title: The bioavailability of the soluble algal products of different microalgal strains and its influence on microalgal growth in unsterilized domestic secondary effluent.
abstract: Soluble algal products (SAPs) accumulated in microalgal culture could be used as carbon source by bacteria, and thus induce serious bacteria contamination. In this study, three freshwater microalgal strains, Scenedesmus sp. LX1 (S. LX1), Chlorella ellipsoidea YJ1 (C. YJ1) and Haematococcus pluvialis (H. pluvialis), were used to investigate the bioavailability of SAPs and its influence on microalgal growth in unsterilized domestic secondary effluent. S. LX1 and H. pluvialis could grow well whether secondary effluent was sterilized or not, while C. YJ1 showed poor growth without sterilization. The assimilable organic carbon (AOC) concentration and AOC content in the SAPs of C. YJ1 was as high as 180μg-CL(-1) and 3.2%, respectively, which induced more serious bacteria contamination and thus inhibited the growth of C. YJ1. Based on the results, in microalgal strain selection for massive cultivation, AOC assays of SAPs could be applied to examine microalgal susceptibility to bacteria contamination.
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
authors.forename: Yin
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Environmental Simulation and Pollution Control State Key Joint Laboratory and State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, PR China.
authors.forename: Yin-Hu
authors.initials: YH
authors.lastname: Wu
authors.affiliation: Environmental Simulation and Pollution Control State Key Joint Laboratory and State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, PR China.
authors.forename: Shu-Feng
authors.initials: SF
authors.lastname: Zhu
authors.affiliation: Environmental Simulation and Pollution Control State Key Joint Laboratory and State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, PR China. Electronic address: hyhu@tsinghua.edu.cn.
authors.forename: Hong-Ying
authors.initials: HY
authors.lastname: Hu
mesh_terms: D001682:Biological Availability; D002244:Carbon / Q000032:analysis / Q000378:metabolism; D002708:Chlorella / Q000254:growth & development / Q000378:metabolism; D058086:Microalgae / Q000254:growth & development* / Q000378:metabolism*; D044444:Scenedesmus / Q000254:growth & development / Q000378:metabolism; D013242:Sterilization; D062065:Wastewater / Q000382:microbiology*; D018508:Water Purification / Q000379:methods
chemical_list: D002244:Carbon; D062065:Wastewater
keywords: Assimilable organic carbon (AOC); Bioavailability; Microalgae; Soluble algal products (SAPs); Wastewater