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Impact of goethite dosed continuous stirred tank reactor on continuous methane production at different organic loading rates
Author(s) -
Wan Zhanghong,
Peng Shuchuan,
Zhang Xun,
Wang Jin,
Li Xiangming,
Yue Zhengbo
Publication year - 2020
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.1002/wer.1222
Subject(s) - goethite , chemistry , anaerobic digestion , methane , methanogenesis , methanobacterium , methanosaeta , continuous stirred tank reactor , pulp and paper industry , bioreactor , methanosarcina , anaerobic exercise , environmental engineering , waste management , environmental chemistry , environmental science , archaea , adsorption , biochemistry , biology , organic chemistry , engineering , gene , physiology
Iron oxides facilitated anaerobic digestion process has been attracted more and more attention in the renewable energy production area. In the current study, goethite was added into the continuous stirred tank reactor with glucose as the substrate. Effect of the influent organic loading rate (OLR) on the reactor performances was explored. Results showed that goethite promoted the methane production significantly ( p < 0.05) when OLR was changed between 1.20 and 1.80 g glucose L −1 day −1 . Compared to the control reactor, addition of goethite improved the methane production by13.4%–22.9%. The iron reduction rate had a positive correlation with the methane production rate. Microbial community analysis results showed that OLRs influenced the dominant methanogenic species in the both reactors. Methanothrix , Methanobacterium , Methanosarcina, and Methanocella were dominant under various OLR levels. Practitioner points Goethite could promote the methanogenic process of glucose in the CSTRs under certain levels of OLRs. Iron reduction rate had a positive correlation with the methane production rate. OLRs influenced the dominant methanogenic species in the goethite‐dosed reactors.