title: Wastewater recycling technology for fermentation in polyunsaturated fatty acid production.
abstract: To reduce fermentation-associated wastewater discharge and the cost of wastewater treatment, which further reduces the total cost of DHA and ARA production, this study first analyzed the composition of wastewater from Aurantiochytrium (DHA) and Mortierella alpina (ARA) fermentation, after which wastewater recycling technology for these fermentation processes was developed. No negative effects of DHA and ARA production were observed when the two fermentation wastewater methods were cross-recycled. DHA and ARA yields were significantly inhibited when the wastewater from the fermentation process was directly reused. In 5-L fed-batch fermentation experiments, using this cross-recycle technology, the DHA and ARA yields were 30.4 and 5.13gL-1, respectively, with no significant changes (P>0.05) compared to the control group, and the water consumption was reduced by half compared to the traditional process. Therefore, this technology has great potential in industrial fermentation for polyunsaturated fatty acid production.
authors.affiliation: Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China; Qingdao Engineering Laboratory of Single Cell Oil, Qingdao 266101, Shandong, China.
authors.forename: Xiaojin
authors.initials: X
authors.lastname: Song
authors.affiliation: Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China; Qingdao Engineering Laboratory of Single Cell Oil, Qingdao 266101, Shandong, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Zengxin
authors.initials: Z
authors.lastname: Ma
authors.affiliation: Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China.
authors.forename: Yanzhen
authors.initials: Y
authors.lastname: Tan
authors.affiliation: Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China; Qingdao Engineering Laboratory of Single Cell Oil, Qingdao 266101, Shandong, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Huidan
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China; Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China; Qingdao Engineering Laboratory of Single Cell Oil, Qingdao 266101, Shandong, China. Electronic address: cuiqiu@qibebt.ac.cn.
authors.forename: Qiu
authors.initials: Q
authors.lastname: Cui
mesh_terms: D016718:Arachidonic Acid / Q000096:biosynthesis; D005231:Fatty Acids, Unsaturated; D005285:Fermentation; D020094:Mortierella; D062065:Wastewater
chemical_list: D016718:Arachidonic Acid; D005231:Fatty Acids, Unsaturated; D062065:Wastewater
keywords: Aurantiochytrium; Fermentation; Mortierella alpina; Polyunsaturated fatty acid; Wastewater