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Bio-augmentation of the filler-enhanced denitrifying sulfide removal process in expanded granular sludge bed reactors
Liu, Qian; Gao, Shuang; Zhou, Qi; Xu, Ran; Li, Zhiling; Hou, Yanan; Sun, Yilu; Huang, Cong
2022-09-01
Source PublicationENVIRONMENTAL RESEARCH
ISSN0013-9351
Volume212Issue:0Pages:113253
AbstractSulfur- and nitrogen-containing organic industrial wastewaters, which primarily result from several processes, including pharmaceutical, slaughter, papermaking, and petrochemical processes, are typical examples of refractory wastewaters. To ensure resource utilization, sulfur compounds at high concentrations in such wastewaters can be converted to elemental sulfur through specific methods. Specifically, the denitrifying sulfide removal (DSR) process can be employed to effectively recover elemental sulfur via biological sulfide oxidation, and reportedly, bio-augmentation presents as an effective strategy by which the challenges that limit the application of the DSR process can be overcome. However, the bacterial loss resulting from microorganism activity inhibition owing to toxic effect of high sulfide concentration as well as the complexity of the organic matter (carbon source) in actual wastewater environments reduce the actual elemental sulfur production rate. In this regard, the bio-augmentation effect of adding fillers under complex carbon source conditions was studied. The structure and function of the microbial community on the surface of the fillers were also analysed to reveal the internal factors that contributed to the increased efficiency of elemental sulfur generation. The results obtained showed that relative to the control, elemental sulfur generation increased 1.5- and 2-fold following the addition of fillers and fillers with microbial inoculants, respectively. Further, in the reactor with the added filler, the dominant bacteria in the biofilm on the filler surface were Pseudomonas and Azoarcus, while in reactor with added fillers plus microbial inoculates, the dominant bacteria in the biofilm on the filler surface were Pseudomonas and Arcobacter. These findings indicated that bio-augmentation promoted the expression of sulfur oxidation functional genes. Furthermore, adding Pseudomonas sp. gs1 for bio-augmentation improved the impact load resistance of the biofilm on the surface of the filler, leading to the rapid restoration of the elemental sulfur generation rate after the impact.
Department中国科学院环境生物技术重点实验室 ; 中国科学院环境生物技术重点实验室
KeywordWASTE-WATER TREATMENT SIMULTANEOUS DESULFURIZATION DENITRIFICATION PERFORMANCE NITRATE
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47772
Collection中国科学院环境生物技术重点实验室
Corresponding AuthorHuang, Cong
Affiliation1.Dongguan Univ Technol, Res Ctr Ecoenvironm Engn, Dongguan 523808, Peoples R China
2.Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Sch Municipal & Environm Engn, Harbin 150090, Peoples R China
3.Chinese Acad Sci, Tianjin Inst Ind Biotechnol, Tianjin 300308, Peoples R China
4.Tianjin Univ Sci & Technol, Coll Biotechnol, Tianjin 300457, Peoples R China
5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples
Recommended Citation
GB/T 7714
Liu, Qian,Gao, Shuang,Zhou, Qi,et al. Bio-augmentation of the filler-enhanced denitrifying sulfide removal process in expanded granular sludge bed reactors[J]. ENVIRONMENTAL RESEARCH,2022,212(0):113253.
APA Liu, Qian.,Gao, Shuang.,Zhou, Qi.,Xu, Ran.,Li, Zhiling.,...&Huang, Cong.(2022).Bio-augmentation of the filler-enhanced denitrifying sulfide removal process in expanded granular sludge bed reactors.ENVIRONMENTAL RESEARCH,212(0),113253.
MLA Liu, Qian,et al."Bio-augmentation of the filler-enhanced denitrifying sulfide removal process in expanded granular sludge bed reactors".ENVIRONMENTAL RESEARCH 212.0(2022):113253.
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