High biomass yields of Chlorella protinosa with efficient nitrogen removal from secondary effluent in a membrane photobioreactor  

作　　者：Min Yang Zhen Liu Aijie Wang Ingmar Nopens Hairong Hu Hong Chen 

机构地区：[1]School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China [2]Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province,Changsha 410114,China [3]BIOMATH,Department of Data Analysis and Mathematical Modelling,Ghent University,Gent B 9000,Belgium [4]Key Laboratory of Environmental Biotechnology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [5]School of Materials Science and Engineering,Hunan University of Science and Technology,Xiangtan 411201,China

出　　处：《Journal of Environmental Sciences》2024年第12期272-282,共11页环境科学学报（英文版）

基　　金：supported by the China Hunan Provincial Science&Technology Department(Nos.2022SK2091 and 2019JJ50646);the Hunan Provincial Department of Education(Nos.18C0206 and 19B040).

摘　　要：Further treatment of secondary effluents before their discharge into the receiving water bodies could alleviate water eutrophication.In this study,the Chlorella proteinosa was cultured in a membrane photobioreactor to further remove nitrogen from the secondary effluents.The effect of hydraulic retention time(HRT)on microalgae biomass yields and nutrient removal was studied.The results showed that soluble algal products concentration reduced in the suspension at low HRT,thereby alleviating microalgal growth inhibition.In addition,the lower HRT reduced the nitrogen limitation for Chlorella proteinosa’s growth through the phase-out of nitrogen-related functional bacteria.As a result,the productivity for Chlorella proteinosa increased from 6.12 mg/L/day at an HRT of 24 hr to 20.18 mg/L/day at an HRT of 8 hr.The highest removal rates of 19.7 mg/L/day,23.8 mg/L/day,and 105.4 mg/L/day were achieved at an HRT of 8 hr for total nitrogen(TN),ammonia,and chemical oxygen demand(COD),respectively.However,in terms of removal rate,TN and COD were the largest when HRT is 24 hr,which were 74.5%and 82.6%respectively.The maximum removal rate of ammonia nitrogen was 99.2%when HRT was 8 hr.

关 键 词：CHLORELLA MPBR FOULING HRT SAP NUTRIENT 

分 类 号：X703[环境科学与工程—环境工程]