Bioremediation of Pyropia-processing wastewater coupled with lipid production using Chlorella sp

Shiyan Zheng; Shanyi Chen; Shangyun Zou; Yiwen Yan; Guang Gao; Meilin He; Changhai Wang; Hui Chen; Qiang Wang

doi:10.1016/j.biortech.2020.124428

Bioremediation of Pyropia-processing wastewater coupled with lipid production using Chlorella sp

Bioresour Technol. 2021 Feb:321:124428. doi: 10.1016/j.biortech.2020.124428. Epub 2020 Nov 20.

Authors

Shiyan Zheng¹, Shanyi Chen², Shangyun Zou², Yiwen Yan², Guang Gao³, Meilin He⁴, Changhai Wang⁵, Hui Chen⁶, Qiang Wang⁷

Affiliations

¹ Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China; Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China.
² Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China.
³ Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China.
⁴ Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
⁵ Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China.
⁶ Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China.
⁷ Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China. Electronic address: wangqiang@henu.edu.cn.

PMID: 33272824
DOI: 10.1016/j.biortech.2020.124428

Abstract

Pyropia-processing wastewater (PPW) contains diverse organic nutrients and causes environmental pollution. To explore the nutrient removal efficiency and growth performance of Chlorella sp. on PPW, the cultures were conducted in different culture substrates. Results showed that, after 7 days of incubation, the removal rates of total nitrogen (TN), total phosphorus (TP) and phycobiliprotein (PP) all reached more than 90% by cultivating Chlorella sp. C2 and C. sorokiniana F-275 in PPW. The chemical oxygen demand (COD) removal efficiencies could be over 50%. Meanwhile, the increments of biomass in two tested Chlorella strains were 1.39 and 4.89 times higher than those of BG11 and BBM substrates and the increases in lipid productivity were 1.34 and 10.18- fold, respectively. The C18:3 fatty acid proportions were markedly reduced by 27.89% and 29.10%. These results suggest that Chlorella sp. could efficiently reduce various nutrients in PPW and simultaneously accumulate higher biomass with higher biodiesel characteristics.

Keywords: Chlorella sp.; Lipid production; Microalgal biomass; Nutrient removal; Pyropia-processing wastewater.

MeSH terms

Biodegradation, Environmental
Biofuels
Biomass
Chlorella*
Lipids
Microalgae*
Nitrogen
Wastewater

Substances

Biofuels
Lipids
Waste Water
Nitrogen