title: Feasibility of enhancing the DEnitrifying AMmonium OXidation (DEAMOX) process for nitrogen removal by seeding partial denitrification sludge.
abstract: The recently proposed DEnitrifying AMmonium OXidation (DEAMOX) process combined anaerobic ammonia oxidation (ANAMMOX) with denitrification to convert nitrate to nitrite, which was a promising way for treating wastewater containing nitrate and ammonia. This study investigated the feasibility of establishing DEAMOX process by seeding partial denitrification sludge (NO3(-) → NO2(-)) using sodium acetate as an electron donor in a sequencing batch reactor. Results showed that the DEAMOX process was established successfully and operated stably in 114-days operation. The average effluent total nitrogen concentration was below 5 mg L(-1) and TN removal efficiency reached up to 97% at COD/NO3(-) ratio of 3.0 under initial NH4(+) concentration of 25 mg L(-1) and NO3(-) of 30 mg L(-1). It suggested that the presence of NO2(-) in the system supplied for ANAMMOX and the relatively long sludge retention time (SRT) for denitrifiers were attributed to commendable coexistence of ANAMMOX and denitrifying bacteria.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, PR China.
authors.forename: Shenbin
authors.initials: S
authors.lastname: Cao
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, PR China; Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China. Electronic address: pyz@bjut.edu.cn.
authors.forename: Yongzhen
authors.initials: Y
authors.lastname: Peng
authors.affiliation: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China.
authors.forename: Rui
authors.initials: R
authors.lastname: Du
authors.affiliation: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China.
authors.forename: Shuying
authors.initials: S
authors.lastname: Wang
mesh_terms: D064751:Ammonium Compounds / Q000032:analysis* / Q000737:chemistry; D001421:Bacteria, Anaerobic / Q000254:growth & development; D019149:Bioreactors / Q000382:microbiology; D058440:Denitrification; D005240:Feasibility Studies; D009566:Nitrates / Q000032:analysis; D009573:Nitrites / Q000032:analysis; D009584:Nitrogen / Q000032:analysis* / Q000737:chemistry; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry / Q000382:microbiology*; D019346:Sodium Acetate / Q000737:chemistry; D062065:Wastewater / Q000737:chemistry* / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D064751:Ammonium Compounds; D009566:Nitrates; D009573:Nitrites; D009584:Nitrogen; D012722:Sewage; D019346:Sodium Acetate; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: ANAMMOX; DEnitrifying AMmonium OXidation (DEAMOX); Nitrogen removal; Partial denitrification