NIEFang,ZHANGSaihui,LINXiaomin,et al.Project Case of Decentralized Greywater Treatment in Urban Communities[J].China Water & Wastewater,2026,42(10):117-122.
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Project Case of Decentralized Greywater Treatment in Urban Communities

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第42卷 Number: 第10期 Page: 117-122 Column: Date of publication: 2026-05-17
Author(s):
NIE　Fang1; 2;  ZHANG　Saihui1; 3;  LIN　Xiaomin1; 2;  LONG　Huayun1; 3;  LIU　Zhiyong1;  ZHANG　Xi1;  JIANG　Jianhong4;  FAN　Jia4;  LUO　Xuanqi1
（1. Hunan Hengkai Environmental Protection Technology Investment Co. Ltd.， Changsha 410000， China； 2. Hunan Future Vertical Eco?building Engineering Technology Center， Changsha 410000， China； 3. Changsha Technology Innovation Center for Refractory Industrial Wastewater Treatment， Changsha 410000， China； 4. Machinery International Engineering Design & Research Institute Co. Ltd.， Changsha 410000， China）
Keywords:
domestic greywater;  decentralized integrated treatment system;  hydrolysis acidification+A2O+MBR hybrid process
Abstract:
This study presents a decentralized integrated greywater treatment system constructed for 17 households in a residential community of Changsha. The system employs a hydrolysis acidification+A 2O+MBR hybrid process and evaluates its operational performance in 2024 along with the associated construction and maintenance costs. Results demonstrate stable treatment effects and significant economic advantages, providing practical insights for urban residential greywater recycling. Results showed that the system achieved annual average removal rates of 94.02% for COD, 97.71% for BOD5, 96.06% for SS, 94.97% for ammonia nitrogen, 79.49% for total nitrogen, and 96.29% for total phosphorus, consistently meeting the first level A standards of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002). The treated effluent was directly reused for landscape irrigation within the community, contributing to a total carbon sequestration of 2.85 tCO2/a. Compared with conventional approaches, this project reduced construction costs by approximately 30% and operation and maintenance expenses by around 15.6%.
Last Update: 2026-05-17