Evaluation of Greenhouse Gas Emissions and Sludge Characteristics in Typical AAO Process WWTPs in Taihu Lake Basin, China
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 (AI 翻訳)
He Li, Zhirun Liu, Rajendra Prasad Singh
🤖 gxceed AI 要約
日本語
中国太湖流域の16か所のAAOプロセス下水処理場（都市部11、工業5）を調査。電力消費が主な排出源だが、工業処理場では汚泥処理・処分段階の寄与が40.1%と高い。処理場の種類や地域により排出特性が異なり、最適なGHG削減戦略は分別が必要。曝気エネルギー最適化、汚泥の脱水改善、カロリー向上が低炭素運転に有効。
English
This study analyzed 16 AAO process WWTPs in China's Taihu Lake Basin, 11 municipal and 5 industrial. Electricity consumption dominates emissions, but sludge treatment contributes 40.1% in industrial plants. Emission profiles vary by type and region, suggesting differentiated mitigation strategies focusing on aeration optimization, sludge dewatering, and energy recovery.
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
日本でも下水処理場の脱炭素化が進んでおり、曝気エネルギーや汚泥処理の最適化は共通課題。本論文の分析手法と知見は、日本の下水道GX施策（省エネ型処理、汚泥エネルギー活用）に応用可能。ただし、日本の処理場特性（処理方式、流入水質）との違いに留意が必要。
In the global GX context
Wastewater treatment is a significant source of GHG emissions globally, yet detailed empirical data are scarce. This paper provides granular emission factors and driver analysis from Chinese plants, directly relevant to Scope 1 and 2 reporting under frameworks like TCFD and ISSB. It underscores the importance of differentiating mitigation strategies by plant type and region.
👥 読者別の含意
🔬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.
📄 Abstract（原文）
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.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1002/apj.70266first seen 2026-06-06 05:35:00
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