EFFECT OF SHOAL WETLAND WATER DEPTH ON NITROGEN AND PHOSPHORUS REMOVAL AND ITS APPLICATION IN RIVER REGULATION

FENG Xiao-hua

doi:10.13205/j.hjgc.202009009

Volume 38 Issue 9

Nov. 2020

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FENG Xiao-hua. EFFECT OF SHOAL WETLAND WATER DEPTH ON NITROGEN AND PHOSPHORUS REMOVAL AND ITS APPLICATION IN RIVER REGULATION[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 53-58,223. doi: 10.13205/j.hjgc.202009009

Citation:

FENG Xiao-hua. EFFECT OF SHOAL WETLAND WATER DEPTH ON NITROGEN AND PHOSPHORUS REMOVAL AND ITS APPLICATION IN RIVER REGULATION[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 53-58,223. doi: 10.13205/j.hjgc.202009009

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EFFECT OF SHOAL WETLAND WATER DEPTH ON NITROGEN AND PHOSPHORUS REMOVAL AND ITS APPLICATION IN RIVER REGULATION

doi: 10.13205/j.hjgc.202009009

FENG Xiao-hua

The 3rd Engineering Co., Ltd, China Railway 17 Bureau Group Corporation, Shijiazhuang 050081, China

Received Date: 2019-12-09

Abstract

Abstract

The removal efficiency of reed wetland under different water depth conditions (5, 10, 15, 20, 25 cm) to nitrogen and phosphorus in Yitong River was studied. The results showed that shallow water was conducive to the nitrification and volatilization of NH₄⁺-N. The removal efficiency of TN and NH₄⁺-N was much higher when water depth was 5 cm, and that of NO₃^--N was much better when water depth was 10 cm. However, the removal efficiency of TN and NH₄⁺-N was significantly reduced when water depth was 25 cm. The adsorption and transformation of NH₄⁺-N played a dominant role in the attenuation of TN. The correlation between phosphorus removal rate and water depth was relatively lower, indicating that phosphorus removal was mainly through chemical transformation and adsorption. According to the influence of water depth on pollutant removal in wetlands, a floating wetland with automatic depth adjustment was designed. The concentrations of TN, NH₄⁺-N and TP in the river in the study area were obviously reduced by the floating wetlands, thus the water quality was improved.
- wetland,
- reed,
- water depth,
- nitrogen,
- phosphorus,
- removal

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References(27)

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