title: [Nitrogen Removal Using ANAMMOX and Denitrification for Treatment of Municipal Sewage].
abstract: In this study, an Anaerobic Baffled Reactor ( ABR) was constructed. The ANAMMOX process was successfully started up using this reactor within 45 days under the following condition: 27 degrees C, pH of 8, HRT of 10 h, and the influent NO2(-) -N/NH4(+) -N was 1.32. At the stable phase, the average TN removal percentages reached 83% and the ΔNH4(+) -N: ΔNO2(-) -N: ΔNO3(-) -N was 1 : 1. 31 : 0.27. In the process of treating municipal sewage, there was inevitably a certain amount of organic carbon in the influent. Organic carbon had no obvious effect on the ANAMMOX process at C/N of 0.5; Nitrogen removal was improved, and the average total nitrogen (TN, including ammonia, nitrite and nitrate nitrogen) removal efficiency of 93% was obtained at C/N of 1. However, at C/N of 2, the TN removal performance reduced due to the suppression of ANAMMOX by organic carbon; the ANAMMOX bacteria could recover their activity in a short period of time by reducing the influent COD concentration. In this work, the performance of the ANAMMOX-denitrification process in the treatment of municipal sewage was investigated, which proved the suitability of ABR-denitrification reactor in treating municipal sewage with low ammonia nitrogen concentration, with an effluent TN concentration of 7.5 mg x L(-1), and the average TN removal percentages reaching 86%.
authors.forename: Shi-ying
authors.initials: SY
authors.lastname: Zhang
authors.forename: Peng
authors.initials: P
authors.lastname: Wu
authors.forename: Yin-ling
authors.initials: YL
authors.lastname: Song
authors.forename: Yao-liang
authors.initials: YL
authors.lastname: Shen
authors.forename: Ting
authors.initials: T
authors.lastname: Zhang
mesh_terms: D000641:Ammonia / Q000737:chemistry; D001419:Bacteria; D019149:Bioreactors; D058440:Denitrification; D009573:Nitrites / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*
chemical_list: D009573:Nitrites; D012722:Sewage; D000641:Ammonia; D009584:Nitrogen