CHAOBo,ZHANGHao-chi,CHENTai-fei,et al.Effect of Feeding Strategy on Purifying Performance of OAO Vegetable Subsurface-flow Wetland[J].China Water & Wastewater,2024,40(1):104-109.
Effect of Feeding Strategy on Purifying Performance of OAO Vegetable Subsurface-flow Wetland
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第1期
Page:
104-109
Column:
Date of publication:
2024-01-01
- Keywords:
- OAO vegetable subsurface-flow wetland; randomly-discharged sewage from village; denitrification; three?point feeding; two-point feeding
- Abstract:
- This paper analyzed the effects of different feeding strategies (one-point feeding, two-point feeding and three-point feeding) on the performance of wetlands for the removal of pollutant in simulated randomly-discharged sewage from a village under field conditions, so as to improve the total nitrogen removal performance of aerobic/anaerobic/aerobic (OAO) vegetable subsurface-flow wetland and maintain its high removal efficiency of organic matter. Compared with one-point feeding strategy, the removal efficiency of total nitrogen in the wetland with three-point feeding strategy was improved, whereas the removal efficiencies of COD and total phosphorus were not significantly improved. Under the optimal flow distribution ratio for nitrogen removal (1∶2∶1), the removal efficiency of total nitrogen increased by 13.56%, the removal rates of ammonia nitrogen, nitrate nitrogen and total nitrogen reached 75.11%, 95.07% and 79.86%, respectively, and the corresponding average concentrations in effluent were 0.65 mg/L, 0.53 mg/L and 1.32 mg/L, respectively. The nitrogen, phosphorus and COD removal rate of the wetland with two-point feeding strategy were higher than those of the wetland with one-point feeding and three-point feeding strategies. The optimal flow distribution ratio for nitrogen removal was 1∶3, the removal rates of ammonia nitrogen, nitrate nitrogen and total nitrogen were 82.10%, 97.71% and 85.59%, and the corresponding average concentrations in effluent were 0.92 mg/L, 0.09 mg/L and 0.93 mg/L, respectively.
Last Update:
2024-01-01