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Reformation of dairy effluent-a phycoremediation approach
Kanagam Nachiappan1,2, Rajasekaran Chandrasekaran3
1Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India.
Environmental Monitoring and Assessment
|February 15, 2023
Summary
Microalgae effectively treat dairy wastewater, converting nutrients into biomass and removing contaminants. This study highlights algae
Area of Science:
- Environmental Biotechnology
- Microalgal Cultivation
- Wastewater Treatment
Background:
- Microalgae are a valuable renewable resource for metabolite production.
- Dairy wastewater (DWW) presents a nutrient-rich effluent requiring treatment.
- Phycoremediation offers a sustainable approach to wastewater management.
Purpose of the Study:
- To investigate the use of dairy wastewater as a nutrient medium for microalgal cultivation.
- To assess the phycoremediation potential of microalgae in removing contaminants from DWW.
- To evaluate the biomass productivity and growth rates of different microalgal strains in DWW.
Main Methods:
- Cultivation of microalgae, including Desmococcus olivaceous, Scenedesmus dimorphus, and Chlorella vulgaris, in dairy wastewater.
- Monitoring of specific growth rates and biomass productivity.
- Measurement of Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD) removal efficiencies.
Main Results:
- Desmococcus olivaceous exhibited the highest specific growth rate (0.55 day⁻¹) and biomass productivity (1.44 g L⁻¹ day⁻¹).
- High removal percentages for COD (up to 82.85%) and BOD (up to 53.45%) were achieved by different microalgal strains.
- Dairy wastewater proved to be a suitable medium for microalgae cultivation and effluent treatment.
Conclusions:
- Microalgae demonstrate significant potential for the phycoremediation of dairy wastewater.
- The cultivation of microalgae in DWW aligns with circular bio-economy principles by converting waste into valuable biomass.
- This approach offers a sustainable solution for dairy effluent treatment and resource recovery.
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