CHAIHong-xiang,CHENYi-fan,SHAOZhi-yu,et al.Performance of Pyrite Substrate Bioretention System for Treatment of Rainfall Runoff[J].China Water & Wastewater,2022,38(No.3):112-117.
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Performance of Pyrite Substrate Bioretention System for Treatment of Rainfall Runoff

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: No.第3 Page: 112-117 Column: Date of publication: 2022-02-01
Author(s):
CHAI　Hong-xiang1; 2;  CHEN　Yi-fan1; 2;  SHAO　Zhi-yu1; 2;  KONG　Zheng1; 2;  GU　Li1; 2;  YUAN　Yun-song1; 2;  FANG　Jun-hua1; 2
（1. Key Laboratory of the Three Gorges Reservoir Region’s Eco?Environment ， Chongqing University， Chongqing 400045， China； 2. National Centre for International Research of Low?carbon and Green Buildings， Chongqing University， Chongqing 400045， China）
Keywords:
bioretention system;  rainfall runoff;  pyrite;  denitrification;  low impact development
Abstract:
A modified pyrite bioretention system based on autotrophic denitrification was developed to solve the problem of unstable denitrification performance caused by the lack of organic carbon source in traditional biological retention system. The performance of nitrogen and phosphorus removal in rainfall runoff by the bioretention system with pyrite as electron donor was investigated, and the microbial community in the system was analyzed. In the case of no organic carbon source in rainfall runoff, the pyrite substrate bioretention system could still achieve nitrogen removal through denitrification, and the average removal efficiencies of nitrate nitrogen and total nitrogen reached 89% and 86%, respectively. In addition, it also had efficient and stable phosphorus removal ability, and the removal efficiency of total phosphorus reached 81%. Pyrite substrate promoted the denitrification capacity of microorganisms in the bioretention system, and the relative abundance of related denitrifying bacteria Pseudomonas and Thiobacillus was 5.7% and 1.6%, respectively.
Last Update: 2022-02-01