QUANXinyu,HUANGXinrui,SHENWu,et al.Purification Efficiency of Novel Passive Aeration Constructed Wetland for Rural Domestic Sewage[J].China Water & Wastewater,2026,42(1):8-14.
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Purification Efficiency of Novel Passive Aeration Constructed Wetland for Rural Domestic Sewage

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第42卷 Number: 第1期 Page: 8-14 Column: Date of publication: 2026-01-01
Author(s):
QUAN　Xinyu1; 2;  HUANG　Xinrui1; 2;  SHEN　Wu3;  GUO　Na4;  ZHOU　Zhenglin5;  LIAO　Bing1; 2
（1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection， Chengdu 610059， China； 2. Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution ， College of Ecology and Environment， Chengdu University of Technology， Chengdu 610059， China； 3. CECEP Construction Engineering Design Institute Co. Ltd.， Chengdu 610052， China； 4. Sichuan Engineering Research Center for Resource Utilization of Municipal Sludge for Building Materials， Sichuan College of Architectural Technology， Deyang 618000， China； 5. Sichuan Top Environmental Protection Co. Ltd.， Chengdu 610052， China）
Keywords:
constructed wetland;  slow?release oxygen material;  nitrogen and phosphorus removal;  rural domestic sewage
Abstract:
To address the challenges of low nitrogen removal efficiency in conventional constructed wetlands (CWs) and limited access to reliable electricity in rural areas, a novel passive aeration constructed wetland system was developed. This system features maifanite and activated alumina balls (10∶1) as the phosphorus removal substrate and CaO2?based slow-release oxygen materials (with an oxygen release period of approximately 125 days) as its core component. Under the influent conditions with COD of (180.24±3.59) mg/L, TP of (2.88±0.11) mg/L, NH4+-N of (25.85±0.48) mg/L, and TN of (34.02±1.29) mg/L, the system achieved removal efficiencies of (89.65±1.89)%, (77.68±2.46)%, (79.44±0.63)% and (64.35±2.23)% for COD, TP, NH4+-N and TN, respectively. The effluent quality consistently met the first level B standard specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). Cost analysis revealed a first-year construction and operation cost of approximately CNY 35 500. This study provides a practical and economically viable alternative for efficient nitrogen and phosphorus removal in decentralized rural domestic sewage treatment systems.
Last Update: 2026-01-01