Medical Waste Management in MENA

Healthcare sector in MENA region is growing at a very rapid pace, which in turn has led to tremendous increase in the quantity of medical waste generation by hospitals, clinics and other establishments. According to a recent Ministry of State for Environmental Affairs report, Egypt generated 28,300 tons of hazardous medical wastes in 2010. In the GCC region, more than 150 tons of medical waste is generated in GCC countries every day. Saudi Arabia leads the pack with daily healthcare waste generation of more than 80 tons. These figures are indicative of the magnitude of the problem faced by municipal authorities in dealing with medical waste disposal problem across the MENA region. 

Multitude of Problems

The growing amount of medical wastes is posing significant public health and environmental challenges in major cities of the region. The situation is worsened by improper disposal methods, insufficient physical resources, and lack of research on medical waste management. Improper management of medical wastes from hospitals, clinics and other facilities in MENA pose occupational and public health risks to patients, health workers, waste handlers, haulers and general public. It may also lead to contamination of air, water and soil which may affect all forms of life. In addition, if waste is not disposed of properly, ragpickers may collect disposable medical equipment (particularly syringes) and to resell these materials which may cause dangerous diseases.

Improper management of medical wastes from hospitals, clinics and other facilities in MENA pose occupational and public health risks to patients, health workers, waste handlers, haulers and general public. It may also lead to contamination of air, water and soil which may affect all forms of life. In addition, if waste is not disposed of properly, ragpickers may collect disposable medical equipment (particularly syringes) and to resell these materials which may cause dangerous diseases.

Medical waste management method in MENA is limited to either small-scale incineration or landfilling. The practice of landfilling of medical wastes is a matter of serious concern as it poses grave risks to public health, water resources, soil fertility as well as air quality. In many Middle East and North Africa countries, medical wastes is mixed with municipal solid wastes and/or industrial wastes which transforms medical wastes into a cocktail of dangerous substances. 

The WHO policy paper of 2004 and the Stockholm Convention, has stressed the need to consider the risks associated with the incineration of healthcare waste as a typical medical waste incinerator releases a wide variety of pollutants which may include particulate matter, heavy metals, acid gases, carbon monoxide and organic compounds. Sometimes pathogens may also be found in the solid residues and in the exhaust of poorly designed and badly operated incinerators. In addition, leachable organic compounds, like dioxins and heavy metals, are usually present in bottom ash residues. Due to these factors, many industrialized countries are phasing out healthcare incinerators and exploring technologies that do not produce any dioxins. Countries like United States, Ireland, Portugal, Canada and Germany have completely shut down or put a moratorium on medical waste incinerators. 

Promising Treatment Options

The alternative technologies for healthcare waste treatment are steam sterilization, advanced steam sterilization, microwave treatment, dry heat sterilization, alkaline hydrolysis, and biological treatment. Nowadays, steam sterilization (or autoclaving) is the most common alternative treatment method. Advanced autoclaves or advanced steam treatment technologies combine steam treatment with vacuuming, internal mixing or fragmentation, internal shredding, drying, and compaction thus leading to as much as 90% volume reduction. 

Microwave treatment is a promising technology in which treatment occurs through the introduction of moist heat and steam generated by microwave energy. Alkaline digestion is a unique type of chemical process that uses heated alkali to digest tissues, pathological waste, anatomical parts, or animal carcasses in heated stainless steel tanks. Biological processes, like composting and vermicomposting, can also be used to degrade organic matter in healthcare waste such as kitchen waste and placenta.

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Energy Efficiency Perspectives for UAE

With Abu Dhabi alone on track to generate more than 10,000 megawatts of electricity for the first time, discussion about improving energy efficiency in the United Arab Emirates is taking on a more critical tone. Daytime energy use in the hot summer months is still experiencing rampant year-on-year growth, with peak demand this year growing by 12 per cent. Lying at the heart of these consumption levels is the need for air conditioning, which accounts for about half of total electricity demand.

Business and Government Action

At the commercial level, considerable steps are being taken to reduce the Emirate’s carbon footprint. A building insulation program in Dubai has resulted in claims that all buildings there have become twice as energy efficient since completion of the program. Further steps are also underway in other ecological areas such as water efficiency and waste management with the intention of ensuring the green credentials of every building meet international environmental standards and expectations.

At the official level the Emirates’ Authority for Standardization and Metrology continues to implement its Energy Efficiency Standardization and Labelling (EESL) program. This introduced specific efficiency and labelling requirements for non-ducted room air-conditioners in 2011.

These measures were joined this year by requirements under the same program for many other household electrical goods including lamps, washing machines and refrigerating appliances. The labelling requirements under this program will become mandatory by 2013 enabling consumers to see which machines are the most efficient and make sound environmental choices that will also save them money on running costs. The EESL programme will be further extended in 2013 to include ducted air-conditioners and chillers.

The UAE’s oil and gas sector also is recognising the importance of the energy efficiency agenda. It might seem counterintuitive that a sector with oil reserves of about 97 billion barrels and natural gas reserves of six trillion cubic meters should be thinking about how to save energy. The issue is that these reserves, despite their size, are not finite and that oil for export produces greater revenue generation than oil for the domestic market. It is, therefore, in the oil and gas sector’s interest to work with those trying to drive down domestic consumption, as it will maximise the sector’s longer term sustainability.  

The Emirates Energy Award was launched in 2007 to recognize the best implemented practices in energy conservation and management that showcase innovative, cost effective and replicable energy efficiency measures. Such acknowledged practices should manifest a sound impact on the Gulf region to stir energy awareness on a broad level and across the different facets of society.

Significance of Behavioural Change

As much as formal initiatives and programmes have their place in the battle for a more energy efficient UAE, there also needs to be a general shift in culture by the public. Improving public perception of green issues and encouraging behaviours that support energy efficiency can contribute significantly towards the overall goal. As fuel prices increase in the domestic market, the UAE’s citizens are already adding more weight to fuel efficiency when considering what cars they will buy.

SUVs and 4x4s might still be the biggest sellers but household budgets are becoming increasingly stretched and many ordinary citizens are looking for smaller more efficient cars. Perhaps for the first time, the entire running costs of cars are being considered and the UAE’s car dealers and their suppliers are looking to accommodate this change in their customers’ attitudes. This trend is so significant that some car dealerships are seeing large year-on-year increases in sales of their smaller, more efficient models.

Car rental companies are seeing this trend also and in Dubai, at least one is making hiring a car with green credentials more appealing to a wider cross-section of the public – offering everything from the more familiar Chevrolet Volts and Nissan Leafs to the most exotic hybrid and fully electric cars available to hire or lease.

Capitalising on these trends makes both environmental and business sense but economic drivers cannot alone be left to change public behaviour. There are really simple measures that government and business should be encouraging people to take. Some may argue that switching-off computers, lights and air-conditioning at the end of the working day may save energy but is not sufficiently worthwhile promoting – voluntary measures of this sort will not impact on overall energy trends.

There is evidence however that if these behaviours are added to measures like installing energy efficient lighting, lowering thermostats and optimising EESL five-star rated air-conditioners, the energy savings really do become significant – potentially halving a building’s energy consumption.

Conserving energy may not yet be a way of life in the UAE but the rapid changes being seen there are an indicator of what is to come. Formal energy efficiency programs and voluntary measures combined will help the UAE maintain its economic strength in the region and because of this it is one agenda that will not be going away.

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CSP-Powered Desalination Prospects in MENA

Conventional large-scale desalination is cost-prohibitive and energy-intensive, and not viable for poor countries in the MENA region due to increasing costs of fossil fuels. In addition, the environmental impacts of desalination are considered critical on account of GHG emissions from energy consumption and discharge of brine into the sea. The negative effects of desalination can be minimized, to some extent, by using renewable energy to power the plants.

What is Concentrated Solar Power

The core element of Concentrated Solar Power Plant is a field of large mirrors reflecting captured rays of sun to a small receiver element, thus concentrating the solar radiation intensity by several 100 times and generating very high temperature (more than 1000 °C). This resultant heat can be either used directly in a thermal power cycle based on steam turbines, gas turbines or Stirling engines, or stored in molten salt, concrete or phase-change material to be delivered later to the power cycle for night-time operation. CSP plants also have the capability alternative hybrid operation with fossil fuels, allowing them to provide firm power capacity on demand. The capacity of CSP plants can range from 5 MW to several hundred MW.

Three types of solar collectors are utilized for large-scale CSP power generation – Parabolic Trough, Fresnel and Central Receiver Systems. Parabolic trough systems use parabolic mirrors to concentrate solar radiation on linear receivers which moves with the parabolic mirror to track the sun from east to west. In a Fresnel system, the parabolic shape of the trough is split into several smaller, relatively flat mirror segments which are connected at different angles to a rod-bar that moves them simultaneously to track the sun. Central Receiver Systems consists of two-axis tracking mirrors, or heliostats, which reflect direct solar radiation onto a receiver located at the top of a tower.

Theoretically, all CSP systems can be used to generate electricity and heat.  All are suited to be combined with membrane and thermal desalination systems. However, the only commercially available CSP plants today are linear concentrating parabolic trough systems because of lower cost, simple construction, and high efficiency

CSP-Powered Desalination Prospects in MENA

A recent study by International Energy Agency found that the six biggest users of desalination in MENA––Algeria, Kuwait, Libya, Qatar, Saudi Arabia, and United Arab Emirates––use approximately 10 percent of the primary energy for desalination. Infact, desalination accounted for more than 4 percent of the total electricity generated in the MENA region in 2010. With growing desalination demand, the major impact will be on those countries that currently use only a small proportion of their energy for desalination, such as Jordan and Algeria.

The MENA region has tremendous wind and solar energy potential which can be effectively utilized in desalination processes. Concentrating solar power (CSP) offers an attractive option to power industrial-scale desalination plants that require both high temperature fluids and electricity.  CSP can provide stable energy supply for continuous operation of desalination plants based on thermal or membrane processes. Infact, several countries in the region, such as Jordan, Egypt, Tunisia and Morocco are already developing large CSP solar power projects.

Concentrating solar power offers an attractive option to run industrial-scale desalination plants that require both high temperature fluids and electricity.  Such plants can provide stable energy supply for continuous operation of desalination plants based on thermal or membrane processes. The MENA region has tremendous solar energy potential that can facilitate generation of energy required to offset the alarming freshwater deficit. The virtually unlimited solar irradiance in the region will ensure large-scale deployment of eco-friendly desalination systems, thereby saving energy and reducing greenhouse gas emissions.  

Several countries in the MENA region – Algeria, Egypt, Jordan, Morocco and Tunisia – have joined together to expedite the deployment of concentrated solar power (CSP) and exploit the region's vast solar energy resources. One of those projects is a series of massive solar farms spanning the Middle East and North Africa. Two projects under this Desertec umbrella are Morocco’s Ouarzazate Concentrated Solar Power plant, which was approved in late 2011, and Tunisia’s TuNur Concentrated Solar Power Plant, which was approved in January 2012. The Moroccan plant will have a 500-MW capacity, while the Tunisia plant will have a 2 GW capacity. Jordan is also making rapid strides with several mega CSP projects under development in Maa’n Development Area. 

Conclusions

Seawater desalination powered by concentrated solar power offers an attractive opportunity for MENA countries to ensure affordable, sustainable and secure freshwater supply. The growing water deficit in the MENA region is fuelling regional conflicts, political instability and environmental degradation. It is expected that the energy demand for seawater desalination for urban centres and mega-cities will be met by ensuring mass deployment of CSP-powered systems across the region. Considering the severe consequence of looming water crisis in the MENA region it is responsibility of all regional governments to devise a forward-looking regional water policy to facilitate rapid deployment and expansion of CSP and other clean energy resources for seawater desalination.

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Vanishing Aquifers in MENA

aquifer-menaAquifers are of tremendous importance for the MENA as world's most water-stressed countries are located in the region, including Kuwait, Qatar, UAE, Palestine, Saudi Arabia, Oman, Iran, Lebanon and Yemen. However, aquifers in MENA are coming under increasing strain and are in real danger of extinction. Eight aquifers systems, including those in MENA, are categorized as ‘over stressed’ aquifers with hardly any natural recharge to offset the water consumed.

Aquifers in MENA

Aquifers stretched beneath Saudi Arabia and Yemen ranks first among ‘overstressed’ aquifers followed by Indus Basin of northwestern India-Pakistan and then by Murzuk-Djado Basin in North Africa. The Nubian Sandstone Aquifer in the Eastern end of Sahara deserts (parts of Sudan, Chad, Libya and most of Egypt) is the world’s largest known ‘fossil’ aquifer system and Bas Sahara basin (most of Algeria-Tunisian Sahara, Morocco and Libya) encloses whole of the Grand Erg Oriental. The non-renewable aquifers in the Middle East are the Arabian Aquifer and The Mountain Aquifer between Israel and Palestine. Some parts in MENA like Egypt and Iraq rely on major rivers (Nile, Tigris and Euphrates) but these surface water flows does not reach the ocean now. Needless to say, water demand in arid and dry MENA countries is met primarily by aquifers and seawater desalination.

MENA region is the most water-scarce region of the world. The region is home to 6.3 percent of world’s population but has access to measly 1.4 percent of the world’s renewable fresh water. The average water availability per person in other geographical regions is about 7,000 m3/year, whereas water availability is merely 1,200 m3/person/year in the MENA region. The region has the highest per capita rates of freshwater extraction in the world (804 m3/year) and currently exploits over 75 percent of its renewable water resources.

Primarily global exploitation of groundwater is for agricultural irrigation. In Saudi Arabia, during 1970’s, landowners were given free subsidies to pump the aquifers for improvisation of agricultural sectors. Soon the country turned out to be world’s premium wheat exporters. But as years passed, water consumption was high in such a rate that the aquifers approached total depletion. Government announced peoples demand to be met by desalination, which is an expensive approach to meet agricultural sector requirement. By end of 1990’s agricultural land declined to less than half of the country’s farm land. Saudi Arabia is no more a wheat exporter rather relies almost entirely on imported crop from other countries. Unfortunately, country has exploited nonrenewable and ancient ‘fossil’ aquifers which could not be recharged by any form of precipitation.

Key Issues

Stress on a country’s agricultural and water resources majorly cause problems in human health as well as instability and conflicts over shared resources. Climate change has also exacerbated water availability in the Middle East. Infact, water stresses has triggered brutal civil war in Syria and worsened the Palestine-Israel conflicts over sharing aquifers. The key issues, according to World Bank, in water utilization in MENA are as follows:

  • Unsustainable and inefficient use: Middle East countries have the highest per capita consumption of domestic water in the world with 40-50% leakage in the urban systems. And 50% water withdrawn for agriculture does not reach as intended.
  • Ineffective policies: the countries diverts 85% of water to grow crops which would be better importing.
  • Deteriorating water quality: contaminated water systems due to insufficient sanitation infrastructure has caused negative impacts on environment and health issues. Like, in Iran where issues associated with inadequate waste water collection and treatment cost estimated 2.2% of GDP.
  • Excessive reliance on the public investment on water accounts for 1-5 percent of GDP.

In MENA an unexpected climate change is likely to bring 20% rainfall reduction and high rate of evaporation which intensifies water stress. And proportionate climate initiated human behavior, more it gets dry, less water in the river, more tendencies to substitute by groundwater. Also depletion of water below the ground will rise to other disasters like sea water intrusion, land subsidence, especially in Arabian Peninsula, in turn destroys the constructions, infrastructures and developments of the country made-up till date.

Tips to Save Aquifers

We do not know how much water is remaining beneath, but we must understand it is vanishing at a very high rate. MENA must treasure aquifers and natural water resource as same as oil reserves are valued. Individual can play a significant role in saving aquifers in MENA by adopting these simple water conservation guidelines

  • Do not drain cooking oil or grease into sink; use adequate amount, reuse like as a shovel cleaner, polish or donate to machinery shops.
  • Effective use of tap; do not run water while brushing. During winters, store the initial cold water that runs out of the tap prior to the hot water from heater. And also know the convenient tap adjustments.
  • Maintain healthy, hygienic and sanitation practices.
  • Replace conventional water pumps and home appliances with advanced water conservative ones.
  • Avoid unnecessary products, food materials and reduce wastage; water consumed in a diet account’s 92% of water footprint of an individual.
  • Avoid sprinklers for irrigation and in garden use to avoid water loss by evaporation and substitute with efficient water distribution system.

By nature, water is definite in this ‘blue planet’. But when there is no right quantity of water at right quality and time it is called ‘Crisis’.

 

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MSW Generation in the Middle East

The high rate of population growth, urbanization and economic expansion in the Middle East is not only accelerating consumption rates but also increasing the generation rate of all  sorts of waste. Bahrain, Saudi Arabia, UAE, Qatar and Kuwait rank in the top-ten worldwide in terms of per capita solid waste generation. The gross urban waste generation quantity from Middle East countries has crossed 150 million tons per annum.The world’s dependence on Middle East energy resources has caused the region to have some of the largest carbon footprints per capita worldwide. The region is now gearing up to meet the challenge of global warming, as with the rapid growth of the waste management sector. During the last few years, UAE, Qatar and Saudi Arabia have unveiled multi-billion dollar investment plans to Improve waste management scenario in their respective countries. 

Solid Waste Generation Statistics

Saudi Arabia produce more than 15 million tons of garbage each year. With an approximate population of about 28 million, the country produces approximately 1.3 kilograms of waste per person every day. More than 5,000 tons of urban waste is generated in the city of Jeddah alone. 

The per capita MSW generation rate  in the United Arab Emirates ranges from 1.76 to 2.3 kg/day. According to a recent study, the amount of solid waste in UAE totaled 4.892 million tons, with a daily average of 6935 tons in the city of Abu Dhabi, 4118 tons in Al Ain and 2349 tons in the western region.

Qatar's annual waste generation stands at 2.5 million tons while Kuwait produces 2 million tons MSW per annum. Bahrain generates more than 1.5 million tons of municipal waste every year. Countries like Kuwait, Bahrain and Qatar have astonishingly high per capita waste generation rate, primarily because of high standard of living and lack of awarness about sustainable waste management practices.

Country

MSW Generation

(million tons per annum)

Saudi Arabia

13

UAE

5

Qatar

2.5

Kuwait

2

Bahrain

1.5

In addition, huge quantity of sewage sludge is produced on daily basis which presents a serious problem due to its high treatment costs and risk to environment, human health and marine life. On an average, the rate of municipal wastewater generation in the Middle East is 80-200 litres per person per day. Cities in the region are facing increasing difficulties in treating sewage, as has been the case in Jeddah where 500,000 cubic metre of raw sewage is discarded in Buraiman Lake daily. Sewage generation across the region is rising by an astonishing rate of 25 percent every year which is bound to create major headaches for urban planners. 

Waste-to-Energy for the Middle East

Municipal solid waste in the Middle East is comprised of organic fraction, paper, glass, plastics, metals, wood etc which can be managed by making use of recycling, composting and/or waste-to-energy technologies. The composting process is a complex interaction between the waste and the microorganisms within the waste. Central composting plants are capable of handling more than 100,000 tons of biodegradable waste per year, but typically the plant size is about 10,000 to 30,000 tons per year.

Municipal solid waste can be converted into energy by conventional technologies (such as incineration, mass-burn and landfill gas capture) or by modern conversion systems (such as anaerobic digestion, gasification and pyrolysis). The three principal methods of thermochemical conversion are combustion (in excess air), gasification (in reduced air), and pyrolysis (in absence of air). The most common technique for producing both heat and electrical energy from urban wastes is direct combustion. Combined heat and power (CHP) or cogeneration systems, ranging from small-scale technology to large grid-connected facilities, provide significantly higher efficiencies than systems that only generate electricity. 

At the landfill sites, the gas produced by the natural decomposition of MSW can be collected from the stored material and scrubbed and cleaned before feeding into internal combustion engines or gas turbines to generate heat and power. In addition, the organic fraction of MSW can be anaerobically stabilized in a high-rate digester to obtain biogas for electricity or steam generation. 

Anaerobic digestion is the most preferred option to extract energy from sewage, which leads to production of biogas and organic fertilizer. The sewage sludge that remains can be incinerated or gasified/pyrolyzed to produce more energy. In addition, sewage-to-energy processes also facilitate water recycling. Infact, energy recovery from MSW is rapidly gaining worldwide recognition as the 4th R in sustainable waste management system – Reuse, Reduce, Recycle and Recover.

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Medical Waste Management: An Infographic

Healthcare sector in the Middle East is growing at a very rapid pace, which in turn has led to tremendous increase in the quantity of medical waste generation by hospitals, clinics and other establishments. The growing amount of medical waste in Middle East is posing significant public health and environmental challenges across the region. The situation is worsened by improper disposal methods, insufficient physical resources, and lack of research on medical waste management.

This infographic will provide more insights into medical waste management situation in the Middle East.

مستقبل تحلية المياة لمنطقة الشرق الأوسط وشمال أفريقيا

تحلية المياه هي عملية معالجة للمياه يتم فيها فصل الأملاح من المياه المالحة لانتاج مياه صالحة للشرب. عملية التحلية تستهلك كمية كبيرة من الطاقة لانتاج الماء العذب من مصادر المياة المالحة. يتم ضخ الماء المالح في عملية التحلية وتكون المخرجات عبارة عن خط ماء عذب بالاضافة لخط أخر من المياة عالية الملوحه جداً.

يوجد أكثر من 15000 وحدة تنقية مياه على المستوى الصناعي في العالم، بطاقة اجمالية تزيد على 8.5 مليار جالون يومياً. يتفوق أسلوب الترشيح بالأغشية في هذا المجال حيث تبلغ نسبته حوالي 44% من اجمالي الطاقة الاجمالية، يليه التحلية بالتسخين MSF بنسبة حوالي 40 %. وبالنسبة للمصادر، تمثل مياة البحار حوالي 58 % والمياه الجوفية المالحة نسبة 23 % والباقي من مصادر أخرى كالانهار والبحيرات المالحة.

مشاكل المياة في منطقة الشرق الأوسط وشمال افريقيا

الحصول على الماء العذب يعد من أكبر مجالات الاهتمامات الصحية اليوم. فمنطقة الشرق الأوسط وشمال افريقيا من أكثر مناطق العالم جفافا. وتؤدي معدلات زيادة السكان العالية بالاضافة للتمدن والزيادة الصناعية مع ندرة المصادر الطبيعيه للماء العذب الي عجز حقيقي في الماء العذب في هذه المنطقة. مصادر المياه العذبه في منطقة الشرق الأوسط وشمال افريقيا يساء استغلالها دائماً مما يؤدي حتما الي زيادة الطلب على المياه المحلاه للحفاظ على مستوى مقبول من امدادات المياه.

ان محطات التحلية التقليديه كبيرة الحجم عالية التكلفة وشديدة الاستهلاك للطاقة، وليست مناسبة للبلدان الفقيرة في منطقة الشرق الأوسط وشمال افريقيا للزيادة في تكاليف الوقود الأحفوري. بالاضافة لذلك، التأثير البيئي لهذه المحطات يعد خطراً على مستوى الانبعاثات الناتجة من استهلاك الطاقة وصرف المحلول الملحي في البحر. المحلول الملحي الناتج له كثافة ملح عالية جدا ويحتوي ايضاً على بقايا لكيماويات ومعادن ناتجه من عملية التحلية مما يهدد الحياة البحرية.

التأثير السلبي لعمليات التحلية يمكن تقليله الي حد ما عن طريق استخدام الطاقة المتجددة لتغذية المحطات بالطاقة. فالمحطات المداره بالطاقة المتجددة تقدم طريقة مستدامة لزيادة توريد المياه العذبة لدول المنطقة، فدول المنطقة لديها امكانيات كبيرة في طاقة الرياح والطاقة الشمسية، والتي يمكن استخدامها بكفاءة في عمليات التحلية مثل التناضح العكسي، والفصل الكهربي وعمليات الفلتره. ان المحطات المداره بالطاقة المتجددة ستزداد جاذبيتها مع تقدم التكنلوجيات وزيادة اسعار الماء العذب والوقود الأحفوري.

محطات التحلية المدارة بالطاقة الشمسية

يمكن استخدام الطاقة الشمسية مباشرة او بشكل غير مباشر في عملية التحلية. أنظمة التجميع التي تستخدم الطاقة الشمسية للتجميع مباشرة في المجمعات الشمسيه تسمى نظم مباشرة، بينما العمليات التي تستخدم مزيج من الطاقة الشمسية مع الطاقة التقليدية  للتحلية تسمى نظم غير مباشرة. العقبة الرئيسية في استخدام الطاقة الحرارية الشمسية على نطاق محطات التحلية الكبيرة هي قلة معدل الانتاجية، وقلة الكفاءة الحرارية واحتياجها لمساحات واسعة. محطات التحلية المعتمدة على الطاقة الحرارية الشمسية تناسب الاحتياجات الصغيره خصوصا في المناطق البعيده والقاحلة والجزر التي تعاني فقرا في مصادر الطاقة التقليدية.

تقدم الطاقة الشمسية المركزة (CSP) خياراً جذاباً لتزويد مجال التحلية على المستوى الصناعي بالطاقة اللازمة والتي تحتاج الي سوائل عالية الحرارة وطاقة كهربائية. وتوفر الطاقة الشمسية المركزة طاقة مستقرة للاستخدام المستمر لعمليات محطات التحلية المعتمدة على التسخين او الأغشية في عمليتها. في الواقع، بدأت دول كثيرة في المنطقة كالأردن ومصر والمملكة العربية في تطوير مشاريع تحلية ضخمه معتمدة على الطاقة الشمسية المركزة تبشر بعهد جديد في منطقة الشرق الأوسط.

ان منطقة الشرق الأوسط وشمال افريقيا لديها امكانيات ضخمة في مجال الطاقة الشمسية والتي تسهل عملية توليد الطاقة اللازمة لتعويض العجز الظاهر في الماء الصالح للشرب. قد تتعرض المنطقة لأزمة مياه شديدة مع عدد السكان الذي من المتوقع ان يتضاعف بحلول عام 2050. يمكن لمحطات التحلية التي تعمل بالطاقة الشمسية مع الاستعمال السليم لمخزون المياه واعادة استعمال مياه الصرف ان تساعد في التقليل من الأزمة المائية في المنطقة. وسوف تقلل ايضاً من الاعباء المادية على حكومات المنطقة من قطاع المياه والكهرباء، ومن ثم توجيه هذه المخصصات المالية في قطاعات أهم كالتعليم والصحة والقطاع الصناعي.

ترجمة: طه واكد – مهندس مدني مهتم بشؤون البيئة – مصر

شريك مؤسس في مشروع دقيقة خضراء  –  معد وكاتب حلقات دقيقة خضراء عاليوتيوب

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Plastic Upcycling Initiative in Egypt

The sheer volume of plastic waste generated coupled with energy and material resources required for production, as well as emissions resulting from these processes paint a grim picture of the environmental havoc created by plastic bags. Single-use plastic bags are a huge threat to the environment as an estimated 1 trillion such bags are consumed worldwide every year.

Plastic bags are notorious for their interference in natural ecosystems and for causing the death of aquatic organisms, animals and birds. In 2006, The United Nations Environment Programme estimated that there are 46,000 pieces of plastic litter floating in every square mile of ocean and upto 80 percent of marine debris worldwide is plastic which are responsible for the death of a more than a million seabirds and 100,000 marine mammals each year from starvation, choking or entanglement.

Re: Genuine Plastic Bags

The problems associated with single-use plastic bags forced two Egyptian youngsters – Yara Yassin and Rania Rafie – to think of a way of reusing plastic bags. Their upcycling venture, Re: Genuine Plastic Bags, makes innovative handbags sewn from throwaway plastic.  Re: Genuine plastic bag is a start up business that aims to recollect existing plastic bags and re-design them in a form of fashionable bags that can be used in day-to-day life, in order to prolong the life of plastic bags, thus producing lesser amount of wastes. They endeavor to create bags that are self-designed and meant for various kinds of stores, brand names, graphical elements and different lifestyles of consumers

The models are produced through a new technique of fusing plastic bags together. The new fused material becomes dryer and more firm, when left to dry, which takes maximum 40 seconds. The outcome is based on the thickness and type of plastic bags fused; if the plastic bag is too thin (LDPE), then it needs several layers to be fused without completely melting. The outcome is also imprecise, as it may shrink from the heat, and maintaining a straight line is almost impossible.

Yara and Rania feel that the eco-friendly bags are a great way to motivate people towards behavioral change, especially in the Middle East. More information about Re: Genuine Plastic Bags can be found at this link

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Say ‘No’ to Disposables

The waste quantities in all parts of the world are increasing many folds. In the past three decades, the waste quantities have almost been doubled. The per capita waste generation is alarmingly high especially in GCC countries. The municipal and governmental authorities have to spend huge resources in collection, storage, transportation, treatment and disposal of these wastes. With limited recycling facilities and absence of reusing culture, more quantities of the waste is now to be managed.

Major part of our municipal waste is still heading towards our landfill sites where it is being dumped, compacted and covered. The landfills are in quarries areas which are becoming soon filled up with the waste. In Bahrain almost 1.7 cum of space is required to accommodate 1 tons of waste.

Use of disposable cutlery has been increasing exponentially in developing countries

Despite a growing push to recycle and reuse, we must try to correct not the symptoms but the disease, and to do that, we should all avoid and reduce. The use of ‘disposables’ in the Middle East has increased exponentially in recent years and the items and quantities are increasing with each passing day. Here are few suggestions to avoid the use of disposables in our daily lives:

  • Avoid Paper Cups and Plates as paper manufacturing consume trees and are bleached white with chlorine, a process that releases dioxin, one of the most toxic chemicals on the planet, and emit methane, a greenhouse gas when trashed and thrown in a landfill.
  • Avoid Polystyrene & Styrofoam which are hazardous, carcinogens, cause air pollution and can cause nervous system impairments among workers. Styrene can leach from containers into our food. Polystyrene cannot be recycled and never biodegrades; it only breaks down into smaller pieces, polluting the environment and harming the animals that mistake it for food.
  • Avoid Bottled Water and use reusable containers for water storage and drinking.
  • Avoid Plastic and Paper Shopping Bags. Keep your own cloth bag ready for all occasions.
  • Avoid Plastic Utensils, paper napkins, plastic cutlery, forks, spoons and knives. Use chinaware or glassware instead.
  • Avoid Use rechargeable batteries instead of single use batteries. •Avoid using disposable diapers and use cloth diapers.
  • Using ink pen rather than ball points and getting a refillables. •Using handkerchief rather than tissue and paper towels.
  • Avoid using disposable stirrers and individually packaged sugar, milk and creamer. Use a spoon for stirring and place the sugar and milk in reusable containers or jugs.
  • Avoid using individual sachets of chilly, mayonnaise or ketchup sauce. Store the sauce in reusable bottles and dispensers instead.
  • Avoid Gift Wrapping and put the gift in a reusable bag instead..

Each time you throw something in the trash, please consider that you have paid its cost and are contributing towards more waste at the landfill.

Please avoid disposables. Be wise and environmental friendly.

Environment as a Peace-Building Tool

The world is changing demographically, economically, politically and environmentally. The acquisition of natural resources, such as water, can be viewed as a threat to the international security. Severe environmental degradation can deepen regional divisions and trigger social conflicts for communities that depend on these resources for their livelihoods and fulfillment of basic needs. Moreover, the environment itself can be dramatically affected by such conflicts.

The unprecedented demand for natural resources is fuelling ethnic conflicts, causing large-scale displacement and is a severe threat to the lands, livelihoods and the way of life of indigenous people. Infact, many of the bloodiest conflicts in Africa and Asia in recent years have been fuelled by profits from the exploitation of natural resources, including diamonds, timber and minerals. Indigenous communities ranging from the Batwa of Central Africa to hill tribes in northern Thailand, Bedouin in the Middle East and Uighurs in China's Xinjiang province face a grave risk of being forced from their land and resources by activities taking place in the name of industrial development.

Locally, tensions over non-extractive natural resources that have an impact on livelihoods can also drive conflicts. Tension can result from the decline of limited sources and inequitable distribution and utilization within a given context; this may spill over into wider instability and violence. In the case of Darfur, one of the reasons that led to violence is competition between herders and farmers over land; historical ethnic divisions compounded this conflict.

A New Approach to Stability

Recognizing the linkages between the environment and insecurity, former U.N. Secretary-General Kofi Annan called for integrating environmental initiatives to solve conflict and instability into the U.N.’s conflict prevention policy. So, if environmental degradation can trigger conflict and violence, then environmental cooperation initiatives can be used as stability-sustaining tools. This can create a dialogue between parties in conflict. Environmental challenges, such as industrial pollution, are global issues that ignore political boundaries. These challenges require a long-term perspective to achieve sustainable management, encourage local and nongovernmental participation, and extend community building beyond the polarization of economic linkages. Furthermore, environment cooperation can build bridges across boundaries and between people, and enhance building a more sustainable peace and stability.

Environmental cooperation can be initial building blocks for increasing confidence and enhancing trust between communities, hence, reducing uncertainties and mitigating tensions. Cooperative sharing of resources encourages common goals, and establishes recognized rights and expectations. Moreover, initiatives of cooperation to manage environmental resources will promote peace between disputing parties and may establish sustained interaction and long-term relationships, encouraging stability. The more environmental initiatives exist, the more conflicts will be resolved in a non-violent manner. Environmental initiatives can be used to initiate dialogue between disputing parties even for non-ecological conflicts.

Shared water supply is an important domain for environmental conflict resolution. Sharing of water resources represents an opportunity to keep the dialogue alive between disputing parties such as in the Nile river case. Management of biodiversity conservation in disputed areas is a major aspect of environmental peace-building strategies. This may help to achieve win-win solutions between local communities. It is worthy to mention that NGOs can enhance the chances of sustainable peace by promoting awareness and motivation of local community participation. Therefore, their influence must be strengthened in policy decisions that are related to environmental security.

Environment and the Arab Spring

In the wake of historic Arab Spring, a new approach to sustainability is required in the Middle East. The Arab world offers a fertile ground and ample opportunities to prepare a sustainable mechanism for peace and regional security using environment as a tool. Traditional tools of conservation, such as Hima and Haram, produce a promising opportunity for environmental synergies in the region.

In order to protect land, forests and wildlife, Prophet Muhammad (Sallallahu Alaihi Wasallam) created inviolable zones in which resources were to be left untouched. Haram areas were drawn up around wells and water sources to protect the groundwater from overpumping. Hima applied to wildlife and forestry and designated an area of land where grazing and woodcutting was restricted, or where certain animal species (such as camels) were protected.

Adopting natural environmental initiatives, such as Hima and Haram, has multiple direct and indirect benefits for development in West Asia. It can enhance trust, build confidence, and reduce uncertainties in the Arab world, which may help in finding an amicable solution to multiple problems faced by this strategic region.

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What is Waste-to-Energy

Energy is the driving force for development in all countries of the world. The increasing clamor for energy and satisfying it with a combination of conventional and renewable resources is a big challenge. Accompanying energy problems in different parts of the world, another problem that is assuming critical proportions is that of urban waste accumulation.

The quantity of waste produced all over the world amounted to more than 12 billion tons in 2006, which increased to 13 billion tons in 2011. The rapid increase in population coupled with changing lifestyle and consumption patterns is expected to result in an exponential increase in waste generation of upto 18 billion tons by the year 2020.

Waste generation rates are affected by socio-economic development, degree of industrialization, and climate. Generally, the greater the economic prosperity and the higher percentage of urban population, the greater the amount of solid waste produced.

GCC countries are well-known for being the world’s top-ranked per capita waste generators. Reduction in the volume and mass of solid waste is a crucial issue especially in the light of limited availability of final disposal sites in the MENA countries. Millions of tons of waste are generated each year in the Middle East with the vast majority disposed of in open fields or burnt wantonly.

What is Waste to Energy

Waste-to-Energy (or WTE) is the use of modern combustion and biochemical technologies to recover energy, usually in the form of electricity and steam, from urban wastes. These new technologies can reduce the volume of the original waste by 90%, depending upon composition and use of outputs. The main categories of waste-to-energy technologies are physical technologies, which process waste to make it more useful as fuel; thermal technologies, which can yield heat, fuel oil, or syngas from both organic and inorganic wastes; and biological technologies, in which bacterial fermentation is used to digest organic wastes to yield fuel.

 

The three principal methods of thermochemical conversion corresponding to each of these energy carriers are combustion in excess air, gasification in reduced air, and pyrolysis in the absence of air. The most common technique for producing both heat and electrical energy from wastes is direct combustion. Combined heat and power (CHP) or cogeneration systems, ranging from small-scale technology to large grid-connected facilities, provide significantly higher efficiencies than systems that only generate electricity. 

Biochemical processes, like anaerobic digestion, can also produce clean energy in the form of biogas which can be converted to power and heat using a gas engine. In addition, wastes can also yield liquid fuels, such as cellulosic ethanol, which can be used to replace petroleum-based fuels. Cellulosic ethanol can be produced from grasses, wood chips and agricultural residues by biochemical route using heat, pressure, chemicals and enzymes to unlock the sugars in biomass wastes. 

Conclusions

Waste-to-energy systems offer two important benefits of environmentally safe waste management and disposal, as well as the generation of clean electric power in the Middle East. Waste-to-energy is not only a solution to reduce the volume of waste that is and provide a supplemental energy source, but also yields a number of social benefits that cannot easily be quantified. The use of waste-to-energy as a method to dispose of solid and liquid wastes and generate power can significantly reduce environmental impacts of municipal solid waste management in the Middle East. 

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Waste-to-Energy Pathways

Waste-to-energy is the use of modern combustion and biological technologies to recover energy from urban wastes. The conversion of waste material to energy can proceed along three major pathways – thermochemical, biochemical and physicochemical. Thermochemical conversion, characterized by higher temperature and conversion rates, is best suited for lower moisture feedstock and is generally less selective for products. On the other hand, biochemical technologies are more suitable for wet wastes which are rich in organic matter.

Thermochemical Conversion

The three principal methods of thermochemical conversion are combustion (in excess air), gasification (in reduced air), and pyrolysis (in absence of air). The most common technique for producing both heat and electrical energy from wastes is direct combustion. Combined heat and power (CHP) or cogeneration systems, ranging from small-scale technology to large grid-connected facilities, provide significantly higher efficiencies than systems that only generate electricity.

Combustion technology is the controlled combustion of waste with the recovery of heat to produce steam which in turn produces power through steam turbines. Pyrolysis and gasification represent refined thermal treatment methods as alternatives to incineration and are characterized by the transformation of the waste into product gas as energy carrier for later combustion in, for example, a boiler or a gas engine. Plasma gasification, which takes place at extremely high temperature, is also hogging limelight nowadays.

Biochemical Conversion

Biochemical processes, like anaerobic digestion, can also produce clean energy in the form of biogas which can be converted to power and heat using a gas engine. Anaerobic digestion is the natural biological process which stabilizes organic waste in the absence of air and transforms it into biofertilizer and biogas. Anaerobic digestion is a reliable technology for the treatment of wet, organic waste.  Organic waste from various sources is biochemically degraded in highly controlled, oxygen-free conditions circumstances resulting in the production of biogas which can be used to produce both electricity and heat.

In addition, a variety of fuels can be produced from waste resources including liquid fuels, such as ethanol, methanol, biodiesel, Fischer-Tropsch diesel, and gaseous fuels, such as hydrogen and methane. The resource base for biofuel production is composed of a wide variety of forestry and agricultural resources, industrial processing residues, and municipal solid and urban wood residues. Globally, biofuels are most commonly used to power vehicles, heat homes, and for cooking.

Physico-chemical Conversion

The physico-chemical technology involves various processes to improve physical and chemical properties of solid waste. The combustible fraction of the waste is converted into high-energy fuel pellets which may be used in steam generation. The waste is first dried to bring down the high moisture levels. Sand, grit, and other incombustible matter are then mechanically separated before the waste is compacted and converted into pellets or RDF. Fuel pellets have several distinct advantages over coal and wood because it is cleaner, free from incombustibles, has lower ash and moisture contents, is of uniform size, cost-effective, and eco-friendly.

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