Abstract：The influential factors of sewage treatment efficiency caused by hydraulic loading and inlet dissolved oxygen are analyzed through an experimental study on the hybrid vertical-flow wetland by a preliminarily system. The research results show that the removal rate of the chemical oxygen demand, total nitrogen and ammonia nitrogen significantly increase with the decrease of the hydraulic loading. The removal rate of the total phosphorus increases with the decrease of hydraulic loading. When the hydraulic loading is lower than 100mm/d, the removal rate of the total phosphorus decreases with the decreasing hydraulic loading. The dissolved oxygen shows no obvious influence on the removal efficiency of the chemical oxygen demand and the total phosphorus, but shows great influence on the removal efficiency of the total nitrogen and ammonia nitrogen, the removal efficiency of which increases significantly with the increase of dissolved oxygen concentration. The results also show that in the wetland system, the removal of the chemical oxygen demand and the total phosphorus mainly occur in the first stage of down-flow wetland, and the removal of the total nitrogen and ammonia nitrogen occur in two stages continuously. The test results show that by optimizing the wetland system structure, hydraulic loading and aeration, the purification effect of the wetland system could be enhanced. Therefore, the hybrid vertical constructed wetland is feasible for the treatment of the sewage in the small and medium-sized railway station.
范英宏. 复合垂直流人工湿地处理生活污水的试验研究[J]. 北京交通大学学报, 2018, 42(6): 41-.
FAN Yinghong. Experimental study on the treatment of sewage by hybrid vertical constructed wetland. Beijing Jiaotong University, 2018, 42(6): 41-.