Efficacy of zero nitrous oxide emitting aerobic denitrifying bacterium, Methylobacterium gregans DC-1 in nitrate removal with strong auto-aggregation property | |
Hong, Pei1,2; Shu, Yilin3,4; Wu, Xingqiang1,2; Wang, Chunbo1,2; Tian, Cuicui1,2; Wu, Hailong3,4; Donde, Oscar Omondi1,2; Xiao, Bangding1,2 | |
刊名 | BIORESOURCE TECHNOLOGY |
2019-12-01 | |
卷号 | 293期号:1页码:8 |
关键词 | Aerobic denitrification Zero N2O Auto-aggregation EPS Hydrophobicity |
ISSN号 | 0960-8524 |
DOI | 10.1016/j.biortech.2019.122083 |
英文摘要 | A novel aerobic denitrifying strain Methylobacterium gregans DC-1 was isolated and identified. Strain DC-1 removed 98.4% of nitrate-nitrogen (NO3--N) and 80.7% of total organic carbon with initial concentrations of 50 and 2400 mg/1, respectively. The N balance showed that most NO3--N was converted to N-2(62.18%) without nitrous oxide (N2O) emission. Response surface analysis showed that the optimal conditions for total N removal were carbon (C):N ratio of 18.7, temperature of 26.8 degrees C, pH of 6.5 and shaking speed of 180 rpm. In combination with the N balance and successful amplification of napA, nirK and nosZ genes, the metabolic pathway was as follows: NO3-NO2- -> NO -> N-2(O) -> N-2. Strain DC-1 had strong auto-aggregation rate (maximum 38.7%), produced large amounts of extracellular polymeric substances (EPS; maximum of 781.4 mg/g cell dry weight) and had corresponding strong hydrophobicity (maximum 83.2%). Pearson correlation analysis showed that EPS content and hydrophobicity were significantly positively correlated with auto-aggregation. |
资助项目 | National Natural Science Foundation of China[31800112] ; National Natural Science Foundation of China[31800390] ; National Natural Science Foundation of China[31870450] ; National Natural Science Foundation of China[31670465] |
WOS关键词 | EXTRACELLULAR POLYMERIC SUBSTANCES ; HETEROTROPHIC NITRIFICATION ; WASTE-WATER ; DENITRIFICATION ; STRAIN ; SLUDGE ; BIOAUGMENTATION ; EFFICIENCY ; BIOFILM ; BIOREMEDIATION |
WOS研究方向 | Agriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels |
语种 | 英语 |
出版者 | ELSEVIER SCI LTD |
WOS记录号 | WOS:000487836600019 |
资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ihb.ac.cn/handle/342005/33483] |
专题 | 水生生物研究所_藻类生物学及应用研究中心_期刊论文 |
通讯作者 | Xiao, Bangding |
作者单位 | 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Key Lab Conservat & Utilizat Important Biol Resou, Wuhu 241000, Peoples R China 4.Anhui Normal Univ, Coll Life Sci, Wuhu 241000, Peoples R China |
推荐引用方式 GB/T 7714 | Hong, Pei,Shu, Yilin,Wu, Xingqiang,et al. Efficacy of zero nitrous oxide emitting aerobic denitrifying bacterium, Methylobacterium gregans DC-1 in nitrate removal with strong auto-aggregation property[J]. BIORESOURCE TECHNOLOGY,2019,293(1):8. |
APA | Hong, Pei.,Shu, Yilin.,Wu, Xingqiang.,Wang, Chunbo.,Tian, Cuicui.,...&Xiao, Bangding.(2019).Efficacy of zero nitrous oxide emitting aerobic denitrifying bacterium, Methylobacterium gregans DC-1 in nitrate removal with strong auto-aggregation property.BIORESOURCE TECHNOLOGY,293(1),8. |
MLA | Hong, Pei,et al."Efficacy of zero nitrous oxide emitting aerobic denitrifying bacterium, Methylobacterium gregans DC-1 in nitrate removal with strong auto-aggregation property".BIORESOURCE TECHNOLOGY 293.1(2019):8. |
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