中国・太湖流域の典型的なAAOプロセス下水処理場における温室効果ガス排出と汚泥特性の評価

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides emission factors and correlation analysis for WWTPs, useful for developing GHG accounting models and benchmarking studies.

🏢実務担当者:Offers actionable insights for plant operators: prioritize aeration efficiency and sludge energy recovery to reduce emissions.

🏛政策担当者:Highlights the need for differentiated emission reduction policies for municipal vs. industrial wastewater treatment sectors.

この研究は、中国の太湖流域に位置する16の嫌気‐無酸素‐好気（AAO）プロセス廃水処理場（WWTP）、すなわち11の都市下水処理場と5の産業廃水処理場からの汚泥特性と温室効果ガス（GHG）排出を調査した。流入水・放流水の水質、汚泥特性、運転パラメータ、GHG排出パターン、およびそれらの影響因子を系統的に分析した。結果は、都市下水処理場と産業廃水処理場の間で排出プロファイルに有意な差異があることを明らかにした：両タイプにおいて電力消費が排出を支配していたが、汚泥処理・処分段階は産業廃水処理場の排出に顕著に寄与していた（40.1%）。比較分析により、産業廃水処理場は廃水処理中の単位排出量が都市下水処理場よりも有意に高く（p ≤ 0.01）、一方、都市下水処理場は薬品消費からの排出原単位が有意に高いことを示した（p ≤ 0.05）。蘇州、無錫、常州のWWTP間では、排出原単位と分布に明確な地域差が観察され、運転および管理上の優先事項の違いを反映していた。相関分析により、電力消費が総排出原単位の主要な駆動要因であることがさらに特定され（p ≤ 0.001）、放流水の全窒素（TN）は排出原単位と負の相関、放流水の化学的酸素要求量（COD）は排出原単位と正の相関を示した。さらに、汚泥の発熱量と有機物含有量は、汚泥処理からの正味排出量と有意に負の相関を示した。これらの知見は、WWTPのタイプと地域に合わせた差別化されたGHG削減戦略の必要性を強調し、曝気エネルギー消費の最適化、汚泥脱水プロセスの改善、および汚泥の発熱量とエネルギー回収の向上によるAAOプロセスの低炭素運転の達成を重視している。

AI 翻訳（deepseek-v4-flash）。 正確を期す場合は下の原文を参照してください。

ABSTRACT This study investigated sludge characteristics and greenhouse gas (GHG) emission from 16 anaerobic‐anoxic‐oxic (AAO) process wastewater treatment plants (WWTPs), 11 municipal and 5 industrial WWTPs, located in the Taihu Lake Basin, China. Influent/effluent water quality, sludge properties, operational parameters, GHG emission patterns, and their influencing factors were systematically analyzed. Results revealed significant differences in emission profiles between municipal and industrial WWTPs: Although electricity consumption dominated emission in both types, the sludge treatment and disposal stage contributed notably (40.1%) to industrial WWTP emission. Comparative analysis showed industrial WWTPs had significantly higher unit emission during wastewater treatment than municipal counterparts ( p  ≤ 0.01), whereas municipal WWTPs exhibited significantly higher emission intensity from chemical consumption ( p  ≤ 0.05). Distinct regional variations in emission intensity and distribution were observed among WWTPs in Suzhou, Wuxi, and Changzhou, reflecting differences in operational and management priorities. Correlation analysis further identified electricity consumption as the primary driver of total emission intensity ( p  ≤ 0.001), with effluent total nitrogen (TN) negatively correlated and effluent chemical oxygen demand (COD) positively correlated with emission intensity. Additionally, sludge calorific value and organic matter content were significantly negatively correlated with net emissions from sludge treatment. These findings highlight the need for differentiated GHG mitigation strategies tailored to WWTP type and region, emphasizing optimization of aeration energy consumption, improvement of sludge dewatering processes, and enhancement of sludge calorific value and energy recovery to achieve low‐carbon operation of AAO processes.

• crossref https://doi.org/10.1002/apj.70266first seen 2026-06-06 05:35:00 · last seen 2026-06-19 05:33:13