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A waste-based circular economy approach for phycoremediation of X-ray developer solution
Swati Sharma1, Anil Kant1, Surajbhan Sevda2
1Department of Biotechnology and Bioinformatics, Jaypee University of Information and Technology, Waknaghat, Solan, Himachal Pradesh, 173 234, India.
This study uses food waste and agri-compost to treat X-ray developer solution, removing pollutants and producing lipids. This waste-based approach offers a sustainable method for environmental remediation and resource recovery.
Area of Science:
- Environmental Science
- Biotechnology
- Waste Management
Background:
- X-ray developer solutions pose environmental challenges due to their chemical composition.
- Developing cost-effective and sustainable phycoremediation strategies is crucial for managing hazardous waste.
- Circular economy principles offer innovative solutions for waste valorization and pollution control.
Purpose of the Study:
- To investigate the phycoremediation of X-ray developer (XD) solution using food waste (FW) and agri-compost media (ACM).
- To assess the potential for concomitant lipid production by D. armatus during the bioremediation process.
- To establish a waste-based circular economy approach for treating XD solution.
Main Methods:
- Utilizing D. armatus with FW and ACM as growth media for phycoremediation of diluted XD solution.
- Optimizing the FW/ACM to XD solution ratio for efficient pollutant removal.
- Monitoring the removal of biological oxygen demand (BOD), chemical oxygen demand (COD), and silver.
- Quantifying lipid content in D. armatus biomass.
Main Results:
- A 3:1 dilution (FW/ACM: XD) proved effective for phycoremediation.
- FW medium achieved 74.50% BOD, 81.69% COD, and 54.70% silver removal with 1.37% lipid content.
- ACM medium achieved 83.05% BOD, 88.88% COD, and 56.30% silver removal with 1.42% lipid content.
- Optimal bioremediation and lipid production occurred by the 19th day of cultivation over 31 days.
Conclusions:
- Waste materials (FW and ACM) can serve as effective nutritive media for phycoremediation of XD solutions.
- The process facilitates significant pollutant removal and co-produces lipids, aligning with circular economy goals.
- This approach presents a sustainable pathway for waste management and the production of valuable commodities.
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