Abstract:The reason of low removal efficiency of total nitrogen in vertical infiltration of subsurface wastewater infiltration system (SWIS) is deficiency of carbon. Three pilot SWISs filled with the same mixed matrix of 5% slag and 95% brown soil were constructed in the laboratory. The experiment results showed that shunt distributing wastewater could significantly improve total nitrogen removal and the average removal rates of total nitrogen increased from 59.37% (without taking distributary measures) to 68.41%, and it had no great influence on the removal of COD and total phosphorus, when distributary ratio was 1:1 and shunt position at the depth of 110 cm. The results suggested that shunt distributing wastewater was simple and effective for nitrogen removal.
潘晶, 孙铁珩, 李海波. 污水地下渗滤系统强化脱氮试验研究[J]. 中国环境科学, 2011, 31(9): 1456-1460.
PAN Jing, SUN Tie-Hang, LI Hai-Bo. Studies on intensified nitrogen removal in subsurface wastewater infiltration system. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(9): 1456-1460.