Carbon source-regulated anaerobic phosphate reduction in a bioelectrochemical system for low-carbon wastewater treatment: Process and mechanism
低炭素排水処理のためのバイオ電気化学システムにおける炭素源制御による嫌気性リン酸還元：プロセスとメカニズム (AI 翻訳)
Yuxin Peng, Xiangfen Cui, Shugen Liu, Senlin Tian, Chen Li, Yong Yang
🤖 gxceed AI 要約
日本語
バイオ電気化学システム（BES）を用いて、低炭素排水からのリン除去を促進するため、炭素源（酢酸ナトリウムとグルコース）の種類と濃度がリン酸還元によるホスフィン（PH3）生成に及ぼす影響を調べた。中程度のグルコース添加が最も高いPH3生成を示し、過剰な添加はメタン生成や硫酸還元に電子が消費され低下した。メカニズムとして、グルコース発酵が電子伝達系とアルカリホスファターゼ活性を高め、還元当量を供給することが示された。この知見は、炭素不足排水でのガス状リン除去の実用化に貢献する。
English
This study investigates how carbon source type and dosage affect biological phosphate reduction to phosphine (PH3) in bioelectrochemical systems (BES) for low-carbon wastewater treatment. Moderate glucose supplementation (203 mg COD/L) yielded the highest PH3 production (27.4 μg/m3), while excessive glucose diverted electrons to methanogenesis and sulfate reduction, reducing PH3. Mechanistically, glucose fermentation enhanced electron transport and alkaline phosphatase activity, providing reducing equivalents for phosphate reduction. The findings offer practical guidance for gaseous phosphorus removal in carbon-deficient wastewater.
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
日本の下水処理場では低炭素化とリン回収が課題であり、本研究成果は炭素源管理による省エネ・低炭素処理に示唆を与える。ただし、実用化にはさらなる検証が必要。
In the global GX context
This work contributes to sustainable wastewater treatment by enhancing phosphorus removal with lower carbon footprint, aligning with global goals for resource recovery and energy efficiency in water utilities.
👥 読者別の含意
🔬研究者:Provides mechanistic insights into carbon-source regulation of phosphate reduction in BES, useful for optimizing wastewater treatment processes.
🏢実務担当者:Offers potential operational strategies for improving phosphorus removal in low-carbon wastewater treatment plants.
📄 Abstract（原文）
Gaseous phosphine (PH 3 ) formation via biological phosphate reduction represents a promising pathway for advanced phosphorus removal from wastewater, yet its application in low‑carbon influents is severely constrained by limited electron donor availability. Using raw wastewater with a background COD of 86–102 mg L -1 , sodium acetate (199 mg COD L -1 ) was compared with glucose at two supplementation levels (203 and 366 mg COD L -1 ) in bioelectrochemical systems (BES), alongside a non‑current glucose control (T0). The glucose‑fed systems at moderate dosage (T2, 203 mg COD L -1 ) yielded average PH 3 concentrations of 27.4 μg m -3 , representing 2.01‑ and 1.71‑fold increases over acetate‑fed (T1) and non‑current (T0) systems, respectively, indicating that complex carbon substrates more effectively promote phosphate reduction. However, excessive glucose (T3, 366 mg COD L -1 ) diverted additional electrons toward competitive methanogenesis and sulfate reduction, lowering PH 3 production to 19.8 μg m -3 despite greater organic carbon availability, suggesting that moderate dosage may provide a favorable balance of electron supply to enhance phosphate reduction. Mechanistically, glucose fermentation sustained higher electron transport system and alkaline phosphatase activities, generating abundant reducing equivalents ([H]) that drove enzymatic phosphate reduction, while enriching carbon‑metabolizing genera ( Candidatus Competibacter, Denitratisoma ) and upregulating pst ‑associated phosphate transport genes. This work suggests that carbon‑source regulation may modulate the competitive utilization of reducing power, favoring phosphate reduction over competing pathways, thereby offering practical guidance for achieving gaseous‑phase phosphorus removal in carbon‑deficient wastewater treatment.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.ceja.2026.101422first seen 2026-08-17 04:58:56
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