Efficient nitrogen removal from synthetic domestic wastewater in a novel step-feed three-stage integrated anoxic/oxic biological aerated filter process through optimizing influent flow distribution ratio.
Abstract In this study, a novel step-feed three-stage integrated anoxic/oxic biological aerated filter (STIAOBAF) process was developed to enhance nitrogen removal from the synthetic domestic wastewater through optimizing influent flow distribution ratio (IFDR) for three stage reactors (R1, R2, R3)....
| Publicado en: | Journal of Environmental Management Vol. 231; pp. 1277 - 1283 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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Academic Press Inc.
Feb2019
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=133750180&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 133750180 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Feb2019 vid: 231 pid: 735 pub: Academic Press Inc. artinfo: ui: 133750180 10.1016/j.jenvman.2018.11.014 ppf: 1277 ppct: 6 formats: tig: atl: Efficient nitrogen removal from synthetic domestic wastewater in a novel step-feed three-stage integrated anoxic/oxic biological aerated filter process through optimizing influent flow distribution ratio. aug: au: Zhou, Xin Zhang, Qi Sun, Hailong Zhao, Qingliang affil: College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China Innovation Center for Postgraduate Education in Municipal Engineering of Shanxi Province, Taiyuan 030024, China State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China su: Nitrogen removal (Water purification) Structural optimization Aerated water flow Denitrification Anoxic zones sug: subj: Nitrogen removal (Water purification) Structural optimization Aerated water flow Denitrification Anoxic zones keyword: Influent flow distribution ratio Microbial community structure Nitrogen removal Step-feed STIAOBAF process Influent flow distribution ratio Microbial community structure Nitrogen removal Step-feed STIAOBAF process ab: Abstract In this study, a novel step-feed three-stage integrated anoxic/oxic biological aerated filter (STIAOBAF) process was developed to enhance nitrogen removal from the synthetic domestic wastewater through optimizing influent flow distribution ratio (IFDR) for three stage reactors (R1, R2, R3). Long-term operation demonstrated that the maximum nitrogen removal efficiency was achieved at the IFDR of 30%:50%:20%. The corresponding effluent total nitrogen (TN) was less than 10 mg/L, superior to the first A grade discharge standard of China (Effluent TN < 15 mg/L). The IFDR was further optimized to 32%:49%:19% by response surface methodology (RSM) model, thus obtaining the highest TN removal efficiency of 81.4%. Nitrogen profiles suggested the 2nd stage reactor was the greatest significant contributor for nitrogen removal of the whole system. Microbial community analysis revealed that Chloroflexi , Bacteroidetes , Firmicutes , and Acidobacteria were abundant in anoxic zones, while Planctomycetes , Bacteroidetes and Verrucomicrobia were rich in oxic zones. Nitrogen removal-associated functional bacterial groups (Nitrospira , Thauera , Azospira and Candidatus Kuenenia) were also identified, supporting high-rate nitrogen removal through the combination of anoxic denitrification with aerobic simultaneous nitrification and denitrification (SND). The STIAOBAF will offer a compact and robust alternative for advanced nitrogen removal from the sewage. Graphical abstract Image Highlights • The STIAOBAF process was successfully developed to enhance TN removal. • The optimal IFDR of the system was 32%:49%:19%. • Nitrogen removal was attributed to anoxic denitrification with aerobic SND. • Variations in microbial community in aerobic and anoxic zones were observed. • Nitrogen removal-associated functional bacterial groups were identified. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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