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Continuous sulfur biotransformation in an anaerobic-anoxic sequential batch reactor involving sulfate reduction and denitrifying sulfide oxidization
Yuan, Ye; Bian, Aiqin; Chen, Fan; Xu, Xijun; Huang, Cong; Chen, Chuan; Liu, Wenzong; Cheng, Haoyi; Chen, Tianming; Ding, Cheng; Li, Zhaoxia; Wang, Aijie
2019-11-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume234Pages:568-578
AbstractThe pathways and intermediates of continuous sulfur biotransformation in an anaerobic and anoxic sequential batch reactor (AA-SBR) involving sulfate reduction (SR) and denitrifying sulfide oxidization (DSO) were investigated. In the anoxic phase, DSO occurred in two sequential steps, the oxidation of sulfide (S2-) to elemental sulfur (S-0) and the oxidation of S to sulfate (SCOT). The oxidation rate of S2- to S-0 was 3.31 times faster than that of S-0 to SO42-, resulting in the accumulation of S-0 as a desired intermediate under S2--S/NO3--N ratio (molar ratio) of 0.9:1. Although, approximately 60% of generated S-0 suspended in the effluent, about 40% of S-0 retained in the sludge, which could be further oxidized or reduced in anoxic or anaerobic phase. In anoxic, S-0 was subsequently oxidized to SO42- under S2--S/NO3--ratio of 0.5:1. In anaerobic, S-0 coexist with SO42- (in fresh wastewater) were simultaneously reduced to S2-, and the reduction rate of SO42- to S2- was 3.17 times faster than that of S-0 to S2-, resulting in a higher production of S-0 in subsequent anoxic phase. Microbial community analysis indicated that SO42-/S-0-reducing bacteria (e.g. Desulfomicrobium and Desulfuromonas) and S2-/S-0-oxidizing bacteria (e.g. Paracoccus and Thermothrix) co-participated in continuous sulfur biotransformation in the AA-SBR A conceptual model was established to describe these main processes and key intermediates. The research offers a new insight into the reaction processes optimization for S-0 recovery and simultaneous removal of SO42- and NO3- in an AA-SBR. (C) 2019 Elsevier Ltd. All rights reserved.
Department中国科学院环境生物技术重点实验室
KeywordSulfur biotransformation Sulfate reduction Denitrifying sulfide oxidization Elemental sulfur Microbial community analysis
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43347
Collection中国科学院环境生物技术重点实验室
Affiliation1.Yancheng Inst Technol, Sch Environm Sci & Engn, Yancheng 224051, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China
3.Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resources & Environm, Harbin 150090, Heilongjiang, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Ye,Bian, Aiqin,Chen, Fan,et al. Continuous sulfur biotransformation in an anaerobic-anoxic sequential batch reactor involving sulfate reduction and denitrifying sulfide oxidization[J]. CHEMOSPHERE,2019,234:568-578.
APA Yuan, Ye.,Bian, Aiqin.,Chen, Fan.,Xu, Xijun.,Huang, Cong.,...&Wang, Aijie.(2019).Continuous sulfur biotransformation in an anaerobic-anoxic sequential batch reactor involving sulfate reduction and denitrifying sulfide oxidization.CHEMOSPHERE,234,568-578.
MLA Yuan, Ye,et al."Continuous sulfur biotransformation in an anaerobic-anoxic sequential batch reactor involving sulfate reduction and denitrifying sulfide oxidization".CHEMOSPHERE 234(2019):568-578.
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