Article(id=1314917900905964273, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917704910340427, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736870400000, receivedDateStr=2025-01-15, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1791430457568, onlineDateStr=2026-10-08, pubDate=1755619200000, pubDateStr=2025-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791430457568, onlineIssueDateStr=2026-10-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791430457568, creator=13701087609, updateTime=1791430457568, updator=13701087609, issue=Issue{id=1314917704910340427, tenantId=1146029695717560320, journalId=1234093305789726721, year='2025', volume='45', issue='8', pageStart='4145', pageEnd='4736', issueExtLink='null', onlineDate='null', pubDate='1755619200000', pubDateStr='2025-08-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1791430410840, creator='13701087609', updateTime=1791431909627, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1314923991341555972, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917704910340427, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1314923991345750277, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917704910340427, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=4245, endPage=4255, ext={EN=ArticleExt(id=1314917901107290866, articleId=1314917900905964273, tenantId=1146029695717560320, journalId=1234093305789726721, language=EN, title=Impact of two-stage anaerobic time ratio on simultaneous nitrogen and phosphorus removal in PNPR-SAEPD process, columnId=1234106386360103680, journalTitle=China Environmental Science, columnName=Water Pollution Control, runingTitle=null, highlight=null, articleAbstract=

This study integrated biological phosphorus removal into the PN-SAEPD process, establishing a PNPR-SAEPD system. To allocate the limited carbon source reasonably, the experiment gradually adjusted the two-stage anaerobic time ratio from 3:1 (90min:30min) in the S1stage to 1:1 (60min:60min) in the S2 stage, and then to 1:3 (30min:90min) in the S3stage. The study investigated the impact of the two-stage anaerobic time ratio on the conversion of influent organic matter, nitrogen and phosphorus removal performance, and microbial community structure of the PNPR-SAEPD system. The results showed that in the S2 stage, with a two-stage anaerobic time ratio of 1:1, the allocation of inflow organic carbon sources was most reasonable. The average COD consumed by the SAEPD and PNPR reactors for storing internal carbon sources was (89.3±8.4)mg/L and (82.6±7.7)mg/L, respectively. The phosphorus removal contribution of the PNPR reactor was (79.1%±8.5%), creating phosphorus starvation conditions for the subsequent anaerobic stage of the SAEPD reactor. The contribution of DPAOs in the SAEPD reactor to the storage of internal carbon sources was only 15%, consuming (10.1±4.0)mg/L of COD. The relative abundance of DPAOs dropped to 3.01%, enhancing the synergistic denitrification of DGAOs and AnAOB. Integrating biological phosphorus removal into the PN reactor improved the stability of short-cut nitrification, with the relative abundance of NOB gradually decreasing from 3.86% to 0.64% and NAR maintaining at around (82.1%±4.0%). In the S2stage, the superior PN performance of the PNPR reactor and the EPD pathway dominated by DGAOs in the SAEPD reactor provided sufficient electron acceptors for AnAOB. The anaerobic ammonium oxidation denitrification contribution remained at about (81.8%±3.6%), the total nitrogen removal rate was maintained at around (88.3%±1.6%), and the effluent total nitrogen concentration was below 10mg/L. The TP removal rate could reach up to 93.7%, and the effluent TP concentration was basically reduced to below 0.5mg/L.

, authors=Dong LI^{1, *}, Lu LV¹, Hui-bin LAI¹, Jie ZHANG^{1, 2}, Kai WANG¹, authorsList=Dong LI, Lu LV, Hui-bin LAI, Jie ZHANG, Kai WANG, authorCompany=null, correspAuthors=Dong LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314917901673521908, articleId=1314917900905964273, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=两级厌氧时间比对PNPR-SAEPD工艺同步脱氮除磷的影响, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

本研究将生物除磷结合至PN-SAEPD工艺中，建立了PNPR-SAEPD系统，为了对有限的碳源进行合理分配，实验将两级厌氧时间比由S1阶段3：1（90min：30min）依次调整为S2阶段1：1（60min：60min）、S3阶段1：3（30min：90min），考察了两级厌氧时间比对PNPR-SAEPD系统的进水有机物转化、脱氮除磷性能以及微生物群落结构的影响．结果表明：S2阶段两级厌氧时间比为1：1，对进水有机碳源的分配最为合理，SAEPD、PNPR反应器储存内碳源所消耗的COD分别为（89.3±8.4）mg/L和（82.6±7.7）mg/L，PNPR反应器的除磷贡献度为（79.1%±8.5%），为后续SAEPD反应器缺氧阶段营造了磷饥饿条件．SAEPD反应器DPAOs对内碳源储存的贡献比例仅为15%，储存内碳源所消耗的COD量为（10.1±4.0）mg/L，DPAOs相对丰度降至3.01%．将生物除磷结合到PN反应器中提高了短程硝化的稳定性，NOB相对丰度由3.86%逐渐降至0.64%，NAR保持在（82.1%±4.0%）．S2阶段PNPR反应器优越的PN性能和SAEPD反应器内DGAOs主导的EPD途径为AnAOB提供了充足的电子受体，厌氧氨氧化脱氮贡献度保持在（81.8%±3.6%），总氮去除率保持在（88.3%±1.6%），出水总氮浓度低于10mg/L且未出现硝酸盐积累；TP去除率最高可达93.7%，出水TP浓度基本降低到0.5mg/L以下．

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李冬（1976-），女，辽宁丹东人，教授，博士，主要研究方向为水环境恢复理论及关键技术．发表论文200余篇．lidong2006@bjut.edu.cn.

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李冬（1976-），女，辽宁丹东人，教授，博士，主要研究方向为水环境恢复理论及关键技术．发表论文200余篇．lidong2006@bjut.edu.cn.

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