Nitrogen and phosphorus removal by GAOs and PAOs using nitrate and limited oxygen as electron acceptors simultaneously and the impact of external carbon source in the anoxic phase
文献类型：期刊论文
| 作者 | Chen, Huanjun2,3; Zhou, Weizheng3; Xu, Zhongbin3 ; Liu, Fen2,3; Feng, Pingzhong3; Su, Lebin1; Xu, Chao2,3; Zhu, Shunni3; Wang, Zhongming3
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| 刊名 | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
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| 出版日期 | 2021-12-01 |
| 卷号 | 9期号:6页码:10 |
| 关键词 | Limited oxygen NO3--N and P removal Microbial community analysis External COD |
| DOI | 10.1016/j.jece.2021.106520 |
| 通讯作者 | Wang, Zhongming(wangzm@ms.giec.ac.cn) |
| 英文摘要 | In this study, the effects of both limited oxygen gradient supplies (0, 0.1-0.3, and 0.3-0.5 mg/L) and nitrate as electron acceptors and an external carbon source in the anoxic phase on nitrogen and phosphorus removal and microbial community structures were investigated. The results demonstrated that more than 90% of the NO3--N and P removal efficiencies were achieved under limited oxygen conditions (0.1-0.5 mg/L). Improved NH4+-N removal and anaerobic COD uptake were achieved under conditions of high oxygen concentrations. The genera of Dechloromonas (DPAOs) and norank _ f _ Bacteroidetes BD2-2 (PAOs) performed P removal without and with oxygen in the reactor, respectively. The genera of Defluviicoccus and Candidatus Competibacter (GAOs) were mainly responsible for NO3--N removal in all phases. It indicated that the GAOs and PAOs were responsible for NO3--N and P removal with a relationship of cooperation besides the competition to carbon source. When there was an external COD in the anoxic phase, the COD and NO3--N could be removed by the genera of Azospira and Thauera thanks to the heterotrophic denitrification. However, the P removal efficiency decreased as the vicious circle that external COD deteriorated the anoxic P removal and polyhydroxyalkanoates (PHAs) consumption, leading to the decrease of the following anaerobic P release and PHAs synthesis, and more remaining COD. Thus, the anaerobic-anoxic-nitrifying (A(2)N) process was suggested to be a promising approach for nutrition removal, considering the negative effects of anoxic external COD. Moreover, the formation of granular sludge was promoted under limited oxygen conditions. |
| WOS关键词 | EXTRACELLULAR POLYMERIC SUBSTANCES ; ENDOGENOUS PARTIAL DENITRIFICATION ; C/N WASTE-WATER ; SIMULTANEOUS NITRIFICATION ; ACCUMULATING ORGANISMS ; NITRITE ACCUMULATION ; SLUDGE ; PERFORMANCE ; ANAMMOX ; DYNAMICS |
| 资助项目 | National Natural Science Foundation of China[51861145103] ; National Natural Science Foundation of China[21878291] ; Natural Science Foundation of Guangdong Province, China[2018A030313883] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515111111] ; Foundation of Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development[Y909JJ1001] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000711637800008 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province, China ; Guangdong Basic and Applied Basic Research Foundation ; Foundation of Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development |
| 源URL | [http://ir.giec.ac.cn/handle/344007/35162]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Wang, Zhongming |
| 作者单位 | 1.Guangzhou Regenerat Med & Hlth Guangdong Lab GRMH, Guangzhou 510530, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Huanjun,Zhou, Weizheng,Xu, Zhongbin,et al. Nitrogen and phosphorus removal by GAOs and PAOs using nitrate and limited oxygen as electron acceptors simultaneously and the impact of external carbon source in the anoxic phase[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2021,9(6):10. |
| APA | Chen, Huanjun.,Zhou, Weizheng.,Xu, Zhongbin.,Liu, Fen.,Feng, Pingzhong.,...&Wang, Zhongming.(2021).Nitrogen and phosphorus removal by GAOs and PAOs using nitrate and limited oxygen as electron acceptors simultaneously and the impact of external carbon source in the anoxic phase.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,9(6),10. |
| MLA | Chen, Huanjun,et al."Nitrogen and phosphorus removal by GAOs and PAOs using nitrate and limited oxygen as electron acceptors simultaneously and the impact of external carbon source in the anoxic phase".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9.6(2021):10. |
入库方式： OAI收割
来源：广州能源研究所
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