DONGQian-qian,LIJun-fei,CHUZhen-yu.Treatment Effect of Vertical-horizontal Flow Constructed Wetland System on Rural Wastewater and Its Influencing Factors[J].China Water & Wastewater,2022,38(21):101-106.
Treatment Effect of Vertical-horizontal Flow Constructed Wetland System on Rural Wastewater and Its Influencing Factors
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第21期
Page:
101-106
Column:
Date of publication:
2022-11-01
- Keywords:
- rural wastewater; vertical?horizontal flow; constructed wetland; hydraulic load; pollution load
- Abstract:
- In order to improve the quality of water environment and further improve the discharge standard of treatment facilities, a vertical-horizontal flow wetland system was constructed for advanced treatment of tail wastewater. By setting sampling points along the system, the change of TN, NH3-N, TP and other water quality indicators was analyzed, and the influence of season and hydraulic load on pollutants removal effect was investigated. It was concluded that the removal of nitrogen in the vertical-horizontal flow wetland system mainly occurred in the vertical flow section, with a removal rate of 48.5%; phosphorus was effectively removed in both vertical and horizontal flow sections, with a removal rate of 41.0%. Season affected the removal efficiency of both nitrogen and phosphorus, the removal rates of TN, NH3-N and TP in summer and autumn were as high as 46%, 47% and 42%, respectively. It was suggested that the hydraulic load of the wetland should be less than 0.5 m3 /(m2·d), the nitrogen load of the inlet water should be less than 5 g/(m2·d), which could ensure that the effluent quality basically met the class Ⅴ standard of the surface water. Zeolite and limestone can be used as the filter materials, and plants can be reasonably selected, which also enhances the removal of nitrogen and phosphorus.
Last Update:
2022-11-01