Intensified organics and nitrogen removal in the intermittent-aerated constructed wetland using a novel sludge-ceramsite as substrate

Bioresource Technology
Haiming WuSuqing Wu

Abstract

In this study, a novel sludge-ceramsite was applied as main substrate in intermittent-aerated subsurface flow constructed wetlands (SSF CWs) for treating decentralized domestic wastewater, and intensified organics and nitrogen removal in different SSF CWs (with and without intermittent aeration, with and without sludge-ceramsite substrate) were evaluated. High removal of 97.2% COD, 98.9% NH4(+)-N and 85.8% TN were obtained simultaneously in the intermittent-aerated CW system using sludge-ceramsite substrate compared with non-aerated CWs. Moreover, results from fluorescence in situ hybridization (FISH) analysis revealed that the growth of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) in the intermittent-aerated CW system with sludge-ceramsite substrate was enhanced, thus indicating that the application of intermittent aeration and sludge-ceramsite plays an important role in nitrogen transformations. These results suggest that a combination of intermittent aeration and sludge-ceramsite substrate is reliable to enhance the treatment performance in SSF CWs.

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Citations

Feb 12, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Shuaiqi ChenQingjie Hou
May 31, 2020·Environmental Science and Pollution Research International·Shuting ShenXiwu Lu
Jul 8, 2020·International Journal of Environmental Research and Public Health·Qiong WanShan Huang
Sep 18, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Liying GongGuangcan Zhu
Jul 2, 2020·Environmental Science and Pollution Research International·Xiaoshuang LaiYingrui Yuan
Mar 19, 2021·Environmental Science and Pollution Research International·Jing ChengXi Jin
Mar 26, 2021·Journal of Environmental Management·Hanxi WangLianxi Sheng
Apr 10, 2021·Environmental Science and Pollution Research International·Fei-Long YanTian Shao
Jul 22, 2021·Environmental Science and Pollution Research International·Liya LiHao Song
Aug 7, 2021·Environmental Science and Pollution Research International·Qiang LiZihao Zhang

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