Sustainable Waste Management: Application of Biotechnology to Reduce Waste

A special issue of Biology (ISSN 2079-7737). This special issue belongs to the section "Biotechnology".

Deadline for manuscript submissions: 1 December 2026 | Viewed by 1030

Special Issue Editors


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Guest Editor
Centre for Applied Bioscience Research, LIFE Health and Biosciences Research Institute, Technological University of the Shannon: Midlands Midwest, Moylish Park, V94 E8YF Limerick, Ireland
Interests: microbiology; microalgal biotechnology; microalgal bioremediation; molecular biology; genetics of cyanobacteria
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Centre for Applied Bioscience Research, LIFE Health and Biosciences Research Institute, Technological University of the Shannon: Midlands Midwest, Moylish Park, V94 E8YF Limerick, Ireland
Interests: algal biotechnology; environmental biotechnology; soil management; sustainablity
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The increasing volume of global waste presents not only an environmental concern but also a biological opportunity to harness living systems for sustainable solutions. This Special Issue, "Sustainable Waste Management: Application of Biotechnology to Reduce Waste," invites contributions that explore the biological mechanisms, organisms, and systems used to reduce, transform, and valorize waste. We particularly welcome studies focusing on microbial consortia, metabolic and enzymatic pathways, genetic and metabolic engineering, and bio-based systems that underpin the bioconversion of waste into valuable products such as biofuels, bioplastics, biofertilizers, and purified water.

Research that elucidates the underlying biology of waste-degrading microbes, the molecular basis of enzyme activity, synthetic biology approaches, and microbial ecology in waste environments is highly encouraged. In addition, integrative studies combining omics technologies, systems biology, and biotechnology to optimize waste valorization processes will be considered.

This Special Issue aims to bring together advances in biological science and biotechnology that contribute to sustainable waste management. Submissions may include original research, reviews, and case studies related to solid waste treatment, wastewater bioremediation, agro-industrial by-product utilization, and biologically driven pollution mitigation. We also welcome interdisciplinary research that links biological processes with circular bioeconomy strategies and sustainable development goals.

Dr. Sushanta Kumar Saha
Dr. Hande Ermis
Guest Editors

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Keywords

  • sustainable waste management
  • environmental biotechnology
  • microbial waste treatment
  • bioresource valorization
  • circular economy
  • waste-to-energy
  • bioreactors and bioprocesses
  • enzymatic degradation
  • industrial and municipal waste treatment

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Published Papers (1 paper)

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Research

16 pages, 602 KB  
Article
Integrated Desalination, Phycoremediation, and Biodiesel Production from Halophilic Microalgae Using Aquaculture Wastewater
by Adel W. Almutairi
Biology 2026, 15(7), 584; https://doi.org/10.3390/biology15070584 - 6 Apr 2026
Viewed by 606
Abstract
Aquaculture wastewater (AWW) contains elevated concentrations of nitrogen, phosphorus, and salts, in addition to many micropollutants that may cause environmental pollution if discharged untreated. This study evaluated the potential of the halophilic microalga Dunaliella salina for simultaneous phycoremediation of AWW and production of [...] Read more.
Aquaculture wastewater (AWW) contains elevated concentrations of nitrogen, phosphorus, and salts, in addition to many micropollutants that may cause environmental pollution if discharged untreated. This study evaluated the potential of the halophilic microalga Dunaliella salina for simultaneous phycoremediation of AWW and production of biodiesel-oriented biomass. Microalgal growth and biochemical composition were compared between AWW and synthetic f/2 medium under controlled laboratory conditions. Results showed that AWW supported efficient microalgal growth, showing a biomass yield of 1.32 g L−1 with a productivity of 0.09 g L−1 d−1, representing 40.88% and 18.42%, respectively, over that obtained in f/2 medium. Cultivation in wastewater also enhanced the volumetric productivity of lipids, proteins, and carbohydrates by 26.20%, 12.46%, and 26.38%, respectively. Significant nutrient removal from AWW was achieved, with high reduction efficiencies for nitrate, nitrite, ammonium, phosphate, and sulfate within the range 76.80–94.10%, along with a decrease in salinity by 29.70%. The lipid fraction was dominated by fatty acid methyl esters suitable for biodiesel production, representing 94.10% of the total lipids. Biodiesel properties met the international fuel standards and were even improved when the microalga was cultivated in AWW. These findings demonstrate that AWW can serve as an effective culture medium for halophilic microalgae, enabling simultaneous wastewater treatment and sustainable biofuel feedstock production. Full article
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