Guwahati: Researchers at Nagaland University have developed an innovative, nature-inspired technology that enables the recovery of valuable resources, such as nutrients, biofuels, biogas, and clean water, from wastewater. This development marks a significant step toward sustainable wastewater management and supports India’s broader circular economy and climate resilience objectives.
The team has advanced the concept of bio-based soft technologies, a class of energy-efficient, ecologically inspired systems that utilise plants, algae, microbes, and natural ecological interactions to simultaneously treat wastewater and recover high-value resources.
Led by Prof. Prabhakar Sharma, Head of the Department of Agricultural Engineering and Technology, the study outlines a roadmap for future applied research, pilot implementations, and integration with national sanitation and water reuse programs. According to Prof. Sharma, the research represents a transformative shift in how wastewater is perceived—not as a waste product but as a hub of valuable resources. He emphasised that adopting these soft technologies can help reduce environmental pollution, improve water quality, and enable sustainable agriculture through nutrient recovery. They also support decentralised, low-cost treatment options in rural and peri-urban areas, making them accessible and scalable for diverse communities.
The findings, published in the peer-reviewed journal Current Opinion in Environmental Science & Health (https://doi.org/10.1016/j.coesh.2024.100587), synthesise recent innovations such as algae-based systems, microbial fuel cells, and constructed wetlands. These technologies demonstrate strong potential for integration into India’s environmental and water management frameworks, while also addressing urgent challenges posed by pollution and water scarcity.
Prof. Jagadish K. Patnaik, Vice Chancellor of Nagaland University, highlighted the urgency and relevance of the research by pointing to the global wastewater burden from domestic, agricultural, and industrial sources. He noted that conventional treatment systems typically focus on pollutant removal but overlook the opportunity to extract valuable resources, creating sustainability challenges and leading to resource depletion. This research, he said, addresses those challenges by demonstrating new opportunities for resource recovery.
Bio-based soft technologies function by emphasizing natural processes—such as microbial action, plant uptake, and ecological interactions—to break down pollutants and extract nutrients and energy-rich compounds. While the current research demonstrates technical feasibility in laboratory settings, moving toward practical, real-world application requires the development of pilot-scale systems. Prof. Sharma noted that the next steps include creating decentralized treatment units in collaboration with local communities and industry partners, conducting long-term studies on system stability and resource recovery effectiveness, and pursuing cost optimization and standardization to enable broader adoption.
The research stands out for several reasons. It presents a holistic integration of resource recovery with pollutant removal, addressing both environmental sustainability and public health. It emphasizes the use of hybrid systems—such as combining microbial fuel cells with algae-based systems—for improved synergy and efficiency. It also accounts for emerging contaminants like microplastics, highlighting possible mechanisms for their capture and degradation. Importantly, the study focuses on practical implementation by stressing the need for scalability, techno-economic evaluation, and targeted future research to overcome deployment barriers.
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