低炭素条件下における運転モード転換が強化生物学的リン除去システムの性能に与える影響
Impact of Operational Mode Transition on Enhanced Biological Phosphorus Removal Systems Performance under Low-Carbon Conditions (原題)
Juan MA, Gongqi Shen, Xiaojun YU, Hao YUAN, Yuan ZHOU, Jinyu Chen
🤖 gxceed AI 要約
日本語
カゼイン加水分解物を唯一の炭素源とし、TetrasphaeraとCandidatus Accumulibacterが優占する強化生物学的リン除去(EBPR)システムを低炭素条件下で構築。嫌気相を4時間から2時間に短縮し2時間の無酸素相を追加する運転モード転換の影響を検討した。転換後もリン除去率は80%以上を維持したが、ポリリン酸蓄積菌の相対存在量は減少し、微生物群集が運転モード変化に敏感であることが示された。
English
An enhanced biological phosphorus removal (EBPR) system dominated by Tetrasphaera and Candidatus Accumulibacter was established under low-carbon conditions using casein hydrolysate as the sole carbon source. Shortening the anaerobic phase from 4 h to 2 h and adding a 2 h anoxic phase slightly reduced phosphorus removal but kept it above 80%, with microbial community shifts closely tracking performance. The study shows EBPR microbial communities are sensitive to operational mode changes under low-carbon conditions.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
下水処理場の省エネ・低炭素運転は日本のGX政策(脱炭素社会に向けたインフラ整備)と緩やかに関連するが、SSBJ・有報・投資家対応といった開示文脈との接点は乏しい。水処理インフラの炭素削減に関心を持つ実務者には参考情報となりうる。
In the global GX context
This work sits in wastewater treatment engineering rather than climate disclosure. It offers marginal value to global GX scholarship, though it touches on low-carbon operation of water infrastructure, an area adjacent to corporate Scope 1/2 emissions from treatment facilities.
👥 読者別の含意
🔬研究者:低炭素条件下でのEBPR微生物群集動態と運転制御に関する基礎的知見を提供する。
🏢実務担当者:下水処理施設の低炭素運転における嫌気・無酸素相の設計判断の参考になる。
📄 Abstract（原文）
To elucidate the operational regulation mechanisms of enhanced biological phosphorus removal systems under low-carbon conditions，an enhanced biological phosphorus removal system dominated by Tetrasphaera and Candidatus Accumulibacter was established under low-carbon conditions using casein hydrolysate as the sole carbon source. Furthermore，the effects of operational mode transition on the removal performance of various pollutants were investigated by shortening the anaerobic phase from 4 h to 2 h and introducing an additional 2 h anoxic phase. After 100 days，the system’s overall performance reached full stability；by the end of the first stage，the removal efficiencies of PO43−-P and NH4+-N were both above 85%，and the COD removal efficiency reached approximately 90%. After the operational mode shift，phosphorus removal efficiency decreased slightly but still remained above 80%. In addition，the variations in pollutant removal performance were highly consistent with the succession patterns of the microbial community. After 120 days of enrichment and acclimation，the relative abundances of Tetrasphaera and Candidatus Accumulibacter increased to 2.45% and 3.79%，respectively，while the proportion of the main nitrifying genus Nitrospira rose from 0.02% to 2.79%. Under the A2/O operational mode，the relative abundances of various denitrifying genera increased significantly，with Thauera reaching 12.93%. Due to the shortened anaerobic duration and reduced energy utilization efficiency，the growth of polyphosphate-accumulating organisms was affected，with the relative abundances of Tetrasphaera and Candidatus Accumulibacter declining to 2.03% and 3.03%，respectively. Meanwhile，the denitrifying polyphosphate-accumulating genus OLB12 exhibited strong adaptability to the anoxic environment，while the relative abundance increased further to 4.79%. In summary，under low-carbon conditions，the microbial community is relatively sensitive to changes in operational mode，and with appropriate carbon sources and phase duration configuration，the enhanced biological phosphorus remo3val system has the potential to achieve simultaneous nitrogen and phosphorus removal.
🔗 Provenance — このレコードを発見したソース
- openalex https://doaj.org/article/92001653fb604917909d8a10e89ec8edfirst seen 2026-10-04 04:44:17
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