Author Archives: Nadjib Drouiche

About Nadjib Drouiche

Dr. Nadjib Drouiche is a multidisciplinary researcher and policy analyst with an extensive academic background and a strong record of scientific publications across several domains. His research interests span semiconductor technology, energetics, and environmental sciences, with a particular emphasis on desalination, wastewater treatment, and sustainable water management.

Desalination Membranes as RDF: Opportunities and Constraints in Cement Kilns

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The rapid expansion of desalination through reverse osmosis has significantly transformed global water resource management, but it has also created a growing challenge related to the management of end-of-life membranes. These industrial wastes, mainly composed of engineering polymers such as polyamide, polysulfone, and polypropylene, exhibit physicochemical properties that, while initially optimized for filtration, may become an asset within an energy recovery framework [1-2]. The average lifespan of reverse osmosis membranes ranges from five to ten years, generating substantial waste streams worldwide [1]. As an order of magnitude, a desalination plant with a capacity of 100,000 m³/day can generate between 2,000 … Continue reading →

Methane Emissions from Anaerobic Degradation of Organic Matter and Mitigation through Flaring

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Methane (CH₄) is a key product of the anaerobic degradation of organic waste and represents one of the most critical environmental challenges associated with waste management systems, particularly landfills and controlled disposal sites. The formation, emission, and mitigation of methane from such systems have been extensively studied due to its high global warming potential and its significant contribution to anthropogenic greenhouse gas emissions. This work provides a comprehensive discussion of methane generation through anaerobic degradation processes and evaluates mitigation strategies, with a particular focus on flaring, which converts methane into carbon dioxide (CO₂), thereby reducing its climate impact. The biodegradation … Continue reading →

Water-Food-Energy-Ecosystems Nexus in MENA: Role of Startups and Entrepreneurship

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The MENA region stands at the intersection of some of the most acute resource challenges globally. Water scarcity, energy dependency, food insecurity, and ecosystem degradation are not isolated crises; they are deeply interconnected, reinforcing one another in complex and often unpredictable ways. The Water–Energy–Food–Ecosystems (WEFE) Nexus has emerged as a conceptual and operational framework to address these interdependencies, promoting integrated resource management and cross-sectoral coordination. Yet, despite its conceptual maturity and policy recognition, the WEFE Nexus in MENA remains largely under-implemented. The missing link is not knowledge, nor policy ambition, it is execution. Increasingly, startups and entrepreneurship are emerging as … Continue reading →

Decentralized Brackish Water Desalination as a Catalyst for Climate-Resilient and Sustainable Agriculture

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Water scarcity has emerged as one of the most pressing challenges facing the Mediterranean basin, a region characterized by sharp climatic gradients, demographic pressures, and structural inequalities in resource distribution. Agriculture alone accounts for between 64% and 79% of freshwater withdrawals in many Mediterranean countries, particularly in the southern and eastern shores, where irrigation is essential for food security and rural livelihoods [1]. Climate change is intensifying these pressures through increased frequency of droughts, rising temperatures, and declining precipitation, thereby exacerbating groundwater depletion and salinization [2]. In this context, decentralized brackish water desalination is gaining recognition as a promising pathway … Continue reading →

Diversifying Water Resources as a Strategic Risk Management Approach: Case of Algeria’s Integrated Water Supply System

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Water scarcity has emerged as one of the most critical global challenges of the twenty-first century, particularly in arid and semi-arid regions where natural water availability is inherently limited and increasingly threatened by climate change. In such contexts, relying on a single water source is no longer sustainable. Scientific consensus increasingly supports the idea that no single solution can solve water scarcity; instead, diversification of water supply sources represents a robust and adaptive risk management strategy. This approach is particularly relevant for countries like Algeria, where water stress is structural, yet where significant investments have been made to mobilize a … Continue reading →

Aquaculture Using Desalination Brine: Transforming a Waste Stream into Sustainable Food Production

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The rapid expansion of desalination capacity in arid and semi‑arid regions has generated an urgent need to find sustainable uses for the concentrated brine by‑product produced by seawater and brackish water desalination plants. Traditionally, brine has been treated as a waste stream, often discharged into the sea or terrestrial environments with little or no value recovery. Because most desalination technologies, especially reverse osmosis, produce brine with salinities significantly higher than natural seawater, improper disposal of this stream can lead to negative environmental impacts, including increased salinity in coastal zones, benthic ecosystem disruption, and changes in water column chemistry. However, over … Continue reading →

Integration of Renewable Energy and Agriculture for Sustainable Water–Food Systems

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The increasing pressure on water, energy, and food systems in arid and semi-arid regions has accelerated the search for integrated solutions capable of addressing these interconnected challenges. In the MENA region, where water scarcity is structural and climate change is intensifying hydrological variability, the convergence of renewable energy and agriculture has emerged as a strategic pathway toward sustainability. In particular, the coupling of renewable energy technologies with brackish water desalination offers a promising approach to support high-value crop production while minimizing environmental impacts and enhancing resource efficiency. This integrated paradigm aligns with the water–energy–food nexus framework, emphasizing synergies, co-benefits, and … Continue reading →

From Climate Commitments to National Pathways: Why NDCs Must Evolve

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When the Paris Agreement was adopted in 2015 under the auspices of the United Nations Framework Convention on Climate Change (UNFCCC), it marked a major turning point in global climate governance. For the first time, climate action was anchored in a universal yet differentiated mechanism, grounded in national realities: Nationally Determined Contributions (NDCs). The Agreement stipulates that each Party shall prepare, communicate, and maintain successive contributions that represent a progression beyond the previous one and reflect the highest possible level of ambition [1]. Contrary to a still widespread perception, NDCs were never designed as fixed commitments. They constitute an evolving … Continue reading →

Economics of Desalination and Local Integration: Comparative Analysis of CAPEX, OPEX, and Industrial Dynamics in Water-Scarce Regions

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Seawater desalination has established itself as a cornerstone of water security in arid and semi-arid regions. Population growth, rapid urbanization, industrialization, and climate variability have significantly increased pressure on conventional water resources, making the use of non-conventional sources essential. Globally, installed desalination capacity has grown steadily over the past two decades, with tens of thousands of units in operation and daily production exceeding 100 million m³/day [1,2]. This expansion is particularly pronounced in the MENA region, which accounts for a majority of global capacity due to its structural water deficit.   Technological advances have profoundly changed the economics of the … Continue reading →

Artisanal Dyeing and Tanning in Algeria and Mali: Craftsmanship, Gender, and Nature-Based Solutions

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Across North and West Africa, artisanal dyeing and tanning remain deeply embedded in everyday life, shaping local economies, cultural identities, and social relations. In Algeria and Mali, these practices are not marginal activities but living traditions that connect generations, sustain households, and contribute to regional markets. From hand-dyed textiles to traditionally tanned leather goods, color and craftsmanship carry meaning far beyond aesthetics. Yet behind this richness lies a less visible reality: the growing pressure that artisanal production places on water resources and ecosystems, particularly through the discharge of untreated wastewater. In both countries, artisanal dyeing and tanning are typically carried … Continue reading →

Sustainable Management of Desalination Brine: Best Practices, Pilot Studies, and Innovations

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The management of brine generated by desalination plants has become one of the key determinants of the environmental and economic sustainability of this technology, which is now strategic for global water security. The production of desalinated water has increased significantly over the past two decades, particularly in arid regions of the Middle East, North Africa, Australia, and certain coastal areas of Europe and North America. This growth has inevitably been accompanied by a proportional increase in brine volumes. Globally, desalination facilities are estimated to produce more than 140 million cubic meters of brine per day, exceeding the volume of freshwater … Continue reading →

كاربونيفا: إعادة صياغة العمل المناخي من خلال الكربون، والطاقة والتكيف

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بالغالب عندما نقوم بمناقشة التغير المناخي، نقوم بمناقشة مجزأة، حيث نصوّر الطاقة كأداة للتخفيف من آثار هذا التغير وننظر للتكيف على أنه وسيلة للسيطرة على الأضرار الحاصلة، ونقوم باختزال الكربون لمقياس وحيد للانبعاثات. وبالرغم من ان هذه المقاربات ساهمت في تنظيم العمل المناخي عالمياً، إلا أنها تقف عاجزة أمام التسارع الذي يواجه العالم بآثار تغير المناخ ومخاطره وتحديات الموارد المرتبطة به. لا تنقصنا التكنولوجيا أو الطموح، بل التكامل. فالتغير المناخي ليس مجرد مشكلة طاقة، ولا انبعاثات فقط، بل هو تحدٍ لكيفية إدارة الكربون ويمتد هذا التحدي عبر أنظمة الطاقة والنظم البيئية وموارد المياه، والامن الغذائي، والمرونة الاجتماعية، وكذلك الاقتصادية. ولتتم … Continue reading →