title: An integrated process of three-dimensional biofilm-electrode with sulfur autotrophic denitrification (3DBER-SAD) for wastewater reclamation.
abstract: A three-dimensional biofilm-electrode reactor (3DBER) was integrated with sulfur autotrophic denitrification (SAD) to improve nitrogen removal performance for wastewater reclamation. The impacts of influent carbon/nitrogen (C/N) ratio, electric current, and hydraulic retention time (HRT) were evaluated. The new process, abbreviated as 3DBER-SAD, achieved a more stable denitrification compared to the recently studied 3DBER in literature. Its nitrogen removal improved by about 45 % as compared to 3DBER, especially under low C/N ratio conditions. The results also revealed that the biofilm bacteria community of 3DBER-SAD contained 21.1 % of the genus Thauera, 19.3 % of the genus Thiobacillus and Sulfuricella, as well as 5.3 % of the genus Alicycliphilus, Pseudomonas, and Paracoccus. The synergy between these heterotrophic, sulfur autotrophic, and hydrogenotrophic denitrification bacteria was believed to cause the high and stable nitrogen removal performance under various operating conditions.
authors.affiliation: Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China. haoruixia@bjut.edu.cn.|College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100124, People's Republic of China. haoruixia@bjut.edu.cn.
authors.forename: Ruixia
authors.initials: R
authors.lastname: Hao
authors.affiliation: Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Chengcheng
authors.initials: C
authors.lastname: Meng
authors.affiliation: Environmental Engineering Program, University of Northern British Columbia (UNBC), V2N 4Z9, Prince George, BC, Canada. Jianbing.Li@unbc.ca.
authors.forename: Jianbing
authors.initials: J
authors.lastname: Li
mesh_terms: D052818:Autotrophic Processes; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology; D002244:Carbon / Q000378:metabolism*; D058440:Denitrification; D004566:Electrodes; D009584:Nitrogen / Q000378:metabolism*; D013455:Sulfur / Q000378:metabolism*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D002244:Carbon; D009584:Nitrogen; D013455:Sulfur; D062065:Wastewater
keywords: 3D biofilm-electrode reactor; Denitrifying bacteria; Heterotrophic denitrification; Hydrogenotrophic denitrification; Sulfur autotrophic denitrification; Wastewater reclamation