GE Tong-gang,SUN Yong-li,HUANG Peng,et al.Research on Rapid Purification of Low-polluted Water Body by High Hydraulic Load Subsurface Flow Wetland[J].China Water & Wastewater,2021,37(9 9):75-81.
Research on Rapid Purification of Low-polluted Water Body by High Hydraulic Load Subsurface Flow Wetland
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
9 9
Page:
75-81
Column:
Date of publication:
2021-05-01
- Keywords:
- low-polluted water body; bypass circulatory purification system; high hydraulic load subsurface flow wetland; rapid operation
- Abstract:
- In order to improve the operation efficiency of a bypass circulatory purification system, a subsurface flow wetland with matrix layer of large-size pebbles was constructed in the system, and the purification performance of the subsurface flow wetland was tested under high hydraulic load of 0.5-2.0 m3/(m2·d). When the hydraulic load increased from 0.5-2.0 m3/(m2·d), overall profiles of average removal efficiencies of COD, NH3-N, TP and Chl-a all showed decreasing trends, and the removal efficiencies deceased rapidly especially when the hydraulic load increased to more than 1.2 m3/(m2·d). When the hydraulic load increased from 0.5-1.0 m3/(m2·d), reduction of the average load of COD, NH3-N, TP and Chl-a increased rapidly. Then, reduction of the average load was relatively stable when the hydraulic load increased from 1.0-1.5 m3/(m2·d), while reduction of the average load reduced rapidly to a lower level with further increase of the hydraulic load. Therefore, it was basically feasible to increase the hydraulic load of the subsurface flow wetland system to about 1.2 m3/(m2·d) by using large-size pebbles as the matrix layer, so as to improve the overall operational efficiency of the bypass circulatory purification system.
Last Update:
2021-05-01