Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 324, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2022.116367
Keywords
Microalgae; Lipid production; Micropollutant; Stress enzymes; Chlorella vulgaris; Scenedesmus armatus
Categories
Funding
- National Research Council of Thailand (NRCT) under the Research Grants for Talented Young Re-searchers (YTG)
- [N41A640116]
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This research investigates the effects of landfill leachate effluent concentrations on stress-induced microalgae lipid production and post-treatment micropollutant degradation. The results indicate that the effluent concentration is positively correlated with lipid production and micropollutant degradation. The optimal condition for microalgae cultivation is 50-75% effluent concentration under 18 hours hydraulic retention time.
This research investigates the effects of landfill leachate effluent concentrations from moving bed biofilm reactor (MBBR) on stress-induced Chlorella vulgaris and Scenedesmus armatus lipid production and post-treatment micropollutant degradation. The effluent concentrations were varied between 25%, 50%, 75%, and 100% (v/ v). The landfill leachate influent was treated using two-stage moving bed biofilm reactor under 24 h and 18 h hydraulic retention time (HRT). The results indicated that the effluent concentration was positively correlated with the stress-induced microalgae lipid production in the post-treatment of residual micropollutants. C. vulgaris and S. armatus completely remove residual micropollutants in the effluent. The superoxide dismutase and perox-idase activity were positively correlated with the cellular lipid content. The lipid content of C. vulgaris and S. armatus cultivated in the 18 h HRT effluent were 31-51% and 51-64%, while those in the 24 h HRT effluent were 15-16% and 5-19%. The optimal condition of microalgae cultivation for the post-treatment of residual micropollutants was 50-75% (v/v) effluent concentrations under 18 h HRT, achieving the highest lipid pro-duction of 113-116 mg/L for C. vulgaris and 74-75 mg/L for S. armatus. Essentially, the MBBR landfill leachate effluent holds promising potential as a substrate for microalgae lipid production.
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