JIANGZhi?guo,LIUYuan,JINJing,et al.Application of Hydrogen Peroxide for In?situ Mitigating Media Blockage in Constructed Wetlands[J].China Water & Wastewater,2025,41(11):48-55.
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Application of Hydrogen Peroxide for In?situ Mitigating Media Blockage in Constructed Wetlands

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第11期 Page: 48-55 Column: Date of publication: 2025-06-01
Author(s):
JIANG　Zhi?guo1; 2;  LIU　Yuan3;  JIN　Jing1;  LIAO　Qun1;  ZHANG　Bing3;  ZHOU　Shuai-feng3;  SHI　Wen-xin3
（1. Chizhou Water Environment Investment and Construction Co. Ltd.， Chizhou 247099， China； 2. Shenzhen Water Investment Co. Ltd.， Shenzhen 518000， China； 3. College of Environment and Ecology， Chongqing University， Chongqing 400045， China）
Keywords:
subsurface flow constructed wetland;  media blockage;  hydrogen peroxide;  microbial community structure
Abstract:
Hydrogen peroxide (H2O2) with concentration of 35% was introduced into the experimental cells of a constructed wetland using a combination of forklift lifting and gravity self-flow, to address the issue of media blockage in the constructed wetland caused by the underflow of tailwater from a wastewater treatment plant in City C. After the addition of H2O2, the outflow rate in the test cell increased from (4.90±0.12) m3/h to (6.42±0.25) m3/h. Following the introduction of the chemical, a yellowish-brown mud-water mixture was observed to flow out, suggesting that H2O2 could effectively mitigate the issue of media blockage in the constructed wetland to some extent. The introduction of H2O2 led to a temporary decrease in the treatment efficiency of the constructed wetland. Nevertheless, after dosing for 60 days, the removal efficiencies of NH4+-N and NO2--N reverted to pre-dosing levels, while the removal efficiencies of COD, TP, TN, and NO3--N increased. Analysis of the microbial community structure revealed that the introduction of H2O2 to enhance the aerobic environment provided favorable conditions for the proliferation of aerobic bacteria, yet it suppressed the activity of nitrifying bacteria within the media. After dosing chemical for 60 days, the abundance of the nitrosating bacterium Nitrosomonas and the denitrifying bacterium Arenimonas increased, thereby contributing to the optimization of the microbial community structure within the media to a certain extent.
Last Update: 2025-06-01