Micropollutants cometabolism of microalgae for wastewater remediation: Effect of carbon sources to cometabolism and degradation products

WATER RESEARCH

卷:183

Article

Hoang Nhat Phong Vo¹  Huu Hao Ngo¹  Guo, Wenshan¹  Khanh Hoang Nguyen²  Chang, Soon Woong³  Dinh Duc Nguyen^3,4  Liu, Yiwen¹  Liu, Yi⁵  Ding, An⁶  Xuan Thanh Bui⁷ 

[1] Univ Technol Sydney, Ctr Technol Water & Wastewater, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia

[2] Tech Univ Denmark, Natl Food Inst, DK-2800 Lyngby, Denmark

[3] Kyonggi Univ, Dept Environm Energy Engn, Suwon 442760, South Korea

[4] Duy Tan Univ, Inst Res & Dev, Da Nang, Vietnam

[5] Fudan Univ, Dept Environm Sci & Engn, 2205 Songhu Rd, Shanghai 200438, Peoples R China

[6] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

[7] Univ Technol, Vietnam Natl Univ Ho Chi Minh, Fac Environm & Nat Resources, 268 Ly Thuong Kiet St,Dist 10, Ho Chi Minh City, Vietnam

关键词: Cometabolism;    Micropollutant;    Microalgae;    Extracellular polymeric substances;    Peroxidase;   

DOI  :  10.1016/j.watres.2020.115974

来源: Elsevier

【 摘 要 】

This study investigated the impacts of selective sole carbon source-induced micropollutants (MPs) cometabolism of Chlorella sp. by: (i) extracellular polymeric substances (EPS), superoxide dismutase and peroxidase enzyme production; (ii) MPs removal efficiency and cometabolism rate; (iii) MPs' potential degradation products identification; and (iv) degradation pathways and validation using the Eawag database to differentiate the cometabolism of Chlorella sp. with other microbes. Adding the sole carbon sources in the presence of MPs increased EPS and enzyme concentrations from 2 to 100-fold in comparison with only sole carbon sources. This confirmed that MPs cometabolism had occurred. The removal efficiencies of tetracycline, sulfamethoxazole, and bisphenol A ranged from 16-99%, 32-92%, and 58-99%, respectively. By increasing EPS and enzyme activity, the MPs concentrations accumulated in microalgae cells also fell 400-fold. The cometabolism process resulted in several degradation products of MPs. This study drew an insightful understanding of cometabolism for MPs remediation in wastewater. Based on the results, proper carbon sources for microalgae can be selected for practical applications to remediate MPs in wastewater while simultaneously recovering biomass for several industries and gaining revenue. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

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