Effect of hydraulic loading rate on pollutant removal efficiency in subsurface infiltration system under intermittent operation and micro-power aeration

Bioresource Technology
Yongqiang YangFanrong Chen

Abstract

The low hydraulic loading rate (HLR) greatly restricts the wide application of subsurface wastewater infiltration system (SWIS) in densely populated areas. To increase the HLR, an innovative SWIS was developed using cyclic operation mode. In each cycle, a wastewater feeding period is followed by a drying period, in which the aeration is conducted by a medium-pressure fan. Results indicated that the removal rate of TOC and NH4(+)-N were more than 85% at HLR of 0.5m(3)/m(2)d, whereas the TN removal rate was lower than 20%, indicating that the aeration was efficient and denitrification process was largely limited in the SWIS. When HLR decreased from 0.5 to 0.2m(3)/m(2)d, the pollutant removal efficiency enhanced slightly except for TN. Overall, the intermittent operation and micro-power aeration, combined with shunting the pollutant loading were really helpful for SWIS to achieve higher HLR, which offers a reference for the design of innovative SWIS.

References

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Citations

Aug 14, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Fanping ZhengWanyuan Hou
Aug 14, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Fanping ZhengShiyue Qi
Mar 8, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Dan LiJie Wang
Dec 23, 2017·Environmental Science and Pollution Research International·Amjad Hussein, Miklas Scholz
Jul 15, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yafei SunHexin Fei
Feb 21, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Fanping ZhengLu Xiao
May 28, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Junling PangJing Pan
May 28, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yue ZhaoJing Pan
Dec 14, 2018·International Journal of Environmental Research and Public Health·Xiaorong ZhangJianing Bai
Aug 29, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yafei SunJing Pan
Apr 13, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Jingna ChenJing Pan

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