INFLUENCE OF TYPE AND DOSING LOCATION OF CARBON SOURCE ON WATER QUALITY OF SUBMERGED ZONE IN PYRITE-BASED BIORETENTION SYSTEMS

CHAI Hongxiang; WANG Xinyue; MA Haiyuan; LIU Fujian; XU Yanhong; MA Jingchen; WENG Zhongshuai; SHAO Zhiyu

doi:10.13205/j.hjgc.202312010

Volume 41 Issue 12

Dec. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(12): 82-88

CHAI Hongxiang, WANG Xinyue, MA Haiyuan, LIU Fujian, XU Yanhong, MA Jingchen, WENG Zhongshuai, SHAO Zhiyu. INFLUENCE OF TYPE AND DOSING LOCATION OF CARBON SOURCE ON WATER QUALITY OF SUBMERGED ZONE IN PYRITE-BASED BIORETENTION SYSTEMS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 82-88. doi: 10.13205/j.hjgc.202312010

Citation:

CHAI Hongxiang, WANG Xinyue, MA Haiyuan, LIU Fujian, XU Yanhong, MA Jingchen, WENG Zhongshuai, SHAO Zhiyu. INFLUENCE OF TYPE AND DOSING LOCATION OF CARBON SOURCE ON WATER QUALITY OF SUBMERGED ZONE IN PYRITE-BASED BIORETENTION SYSTEMS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 82-88. doi: 10.13205/j.hjgc.202312010

Citation:

CHAI Hongxiang, WANG Xinyue, MA Haiyuan, LIU Fujian, XU Yanhong, MA Jingchen, WENG Zhongshuai, SHAO Zhiyu. INFLUENCE OF TYPE AND DOSING LOCATION OF CARBON SOURCE ON WATER QUALITY OF SUBMERGED ZONE IN PYRITE-BASED BIORETENTION SYSTEMS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 82-88. doi: 10.13205/j.hjgc.202312010

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INFLUENCE OF TYPE AND DOSING LOCATION OF CARBON SOURCE ON WATER QUALITY OF SUBMERGED ZONE IN PYRITE-BASED BIORETENTION SYSTEMS

doi: 10.13205/j.hjgc.202312010

1. College of Environment and Ecology, Chongqing University, Chongqing 400044, China;
2. China Construction Industrial & Energy Engineering Group Co., Ltd., Nanjing 210023, China

Received Date: 2023-10-26
Available Online: 2024-03-08

Abstract

Abstract

The establishment of submerged zones and the addition of carbon sources in bioretention facilities is a common method for enhancing nitrogen removal at present, which makes the submerged zone the main site for denitrification and an important factor affecting the efficiency of bioretention facilities. However, few researchers have studied the effects of the types and locations of carbon sources in bioretention facilities on water quality of submerged zones. Based on the ability of simultaneous nitrogen and phosphorus removal of pyrite, the effect of carbon source on water quality in the submerged zone was studied by changing the type of carbon sources (corncob, rice husk, woodchips) and dosing locations of carbon source corncob in pyrite-based bioretention facility. The results showed that NO₃^--N removal rate of the three carbon sources was in the order of woodchips > rice husk > corn cob, and the woodchips did not cause a decrease in removal efficiency of NH₄⁺-N. Further study on the water quality of the submerged zone showed that NH₄⁺-N and PO₄^3--P were lower in the submerged zone after the addition of woodchips, and the removal efficiency of NO₃^--N was higher. The carbon source added to the mulching layer led to a better NH₄⁺-N and PO₄^3--P removal performance, but a slightly lower removal performance of NO₃^--N. In the submerged zone, the addition of carbon sources in the mulching layer helped maintain a lower and stable NH₄⁺-N concentration and provided appropriate COD to continuously reduce NO₃^--N. More importantly, when the carbon source was added in the vadose zone and mulching layer, the denitrification mainly occurred during drought, while when the carbon source was added in the submerged zone, the denitrification mainly occurred during rainfall.
- stormwater treatment,
- bioretention,
- submerged zone,
- carbon source,
- pyrite

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References(23)

References

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