title: Comparison of nitrogen removal and microbial distribution in wastewater treatment process under different electron donor conditions.
abstract: The applicability of modified spent caustic (MSC) as an electron donor for denitrification was evaluated in a lab-scale reactor for the Bardenpho process under various electron donor conditions: (A) no electron donor, (B) methanol, (C) thiosulfate and (D) MSC conditions. TN removal efficiency varied in each condition, 23.1%, 87.8%, 83.7% and 71.7%, respectively. The distribution ratio of nitrifying bacteria and DGGE profile including sulfur-reducing or oxidizing bacteria also varied depending on the conditions. These results indicated that the MSC would be used as an efficient electron donor for denitrification by autotrophic denitrifier in wastewater treatment process.
authors.affiliation: Department of Civil and Environmental Engineering, Pusan National University, Busan 609-735, Republic of Korea.
authors.forename: Sora
authors.initials: S
authors.lastname: Park
authors.forename: Jiyun
authors.initials: J
authors.lastname: Seon
authors.forename: Imgyu
authors.initials: I
authors.lastname: Byun
authors.forename: Sunja
authors.initials: S
authors.lastname: Cho
authors.forename: Taejoo
authors.initials: T
authors.lastname: Park
authors.forename: Taeho
authors.initials: T
authors.lastname: Lee
mesh_terms: D052818:Autotrophic Processes; D001419:Bacteria / Q000235:genetics / Q000378:metabolism*; D001673:Biodegradation, Environmental; D004583:Electrons; D004587:Electrophoresis, Agar Gel; D017404:In Situ Hybridization, Fluorescence; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D009930:Organic Chemicals / Q000302:isolation & purification; D010100:Oxygen / Q000302:isolation & purification; D010802:Phylogeny; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012722:Sewage / Q000382:microbiology; D013431:Sulfates / Q000032:analysis; D014865:Waste Disposal, Fluid; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D009930:Organic Chemicals; D000644:Quaternary Ammonium Compounds; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D013431:Sulfates; D009584:Nitrogen; D010100:Oxygen