title: Intensified organics and nitrogen removal in the intermittent-aerated constructed wetland using a novel sludge-ceramsite as substrate.
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.
authors.affiliation: College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, PR China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Haiming
authors.initials: H
authors.lastname: Wu
authors.affiliation: National Engineering Laboratory of Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, PR China.
authors.forename: Jinlin
authors.initials: J
authors.lastname: Fan
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China. Electronic address: zhangjian00@sdu.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
authors.forename: Huu Hao
authors.initials: HH
authors.lastname: Ngo
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
authors.forename: Wenshan
authors.initials: W
authors.lastname: Guo
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Liang
authors.affiliation: College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, PR China.
authors.forename: Jialong
authors.initials: J
authors.lastname: Lv
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Shaoyong
authors.initials: S
authors.lastname: Lu
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Weizhong
authors.initials: W
authors.lastname: Wu
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Suqing
authors.initials: S
authors.lastname: Wu
mesh_terms: D000332:Aerobiosis; D000538:Aluminum Silicates / Q000737:chemistry*; D057919:Biological Oxygen Demand Analysis; D000077215:Clay; D058440:Denitrification; D017404:In Situ Hybridization, Fluorescence; D009584:Nitrogen / Q000302:isolation & purification*; D009930:Organic Chemicals / Q000302:isolation & purification*; D012212:Rheology; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry; D053833:Wetlands
chemical_list: D000538:Aluminum Silicates; D000077215:Clay; D009584:Nitrogen; D009930:Organic Chemicals; D012722:Sewage; D062065:Wastewater
keywords: Aeration; Domestic wastewater; Nitrogen removal; Subsurface flow constructed wetlands