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

•Pyropia-processing wastewater (PPW) was directly reutilized by Chlorella sp..•Chlorella cells could grow well in concentrated PPW.•Chlorella strains displayed great potential in nutrient removal from undiluted PPW.•Chlorella strains exhibited higher biomass and lipid productivity in undiluted PPW.•...

Full description

Saved in:
Bibliographic Details
Published in:Bioresource technology 2021-02, Vol.321, p.124428, Article 124428
Main Authors: Zheng, Shiyan, Chen, Shanyi, Zou, Shangyun, Yan, Yiwen, Gao, Guang, He, Meilin, Wang, Changhai, Chen, Hui, Wang, Qiang
Format: Article
Language:English
Subjects:
Biodegradation, Environmental
Biofuels
Biomass
Chlorella
Chlorella sp
Lipid production
Lipids
Microalgae
Microalgal biomass
Nitrogen
Nutrient removal
Pyropia-processing wastewater
Waste Water
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Pyropia-processing wastewater (PPW) was directly reutilized by Chlorella sp..•Chlorella cells could grow well in concentrated PPW.•Chlorella strains displayed great potential in nutrient removal from undiluted PPW.•Chlorella strains exhibited higher biomass and lipid productivity in undiluted PPW.•PPW would be an alternatively cost-effective medium for microalgae cultivation. 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.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2020.124428