title: Long-term operation performance and variation of substrate tolerance ability in an anammox attached film expanded bed (AAFEB) reactor.
abstract: An anammox attached film expanded bed (AAFEB) reactor was operated to study the long-term performance and the variation of substrate tolerance ability. The results indicated that the nitrogen loading potential (NLP) was significantly enhanced from 13.56gN·(L·d)(-)(1) to 20.95gN·(L·d)(-)(1) during the stable operation period. The inhibitory concentration of 10% (IC10) for free ammonia (FA), free nitrous acid (FNA) and SNinf (diluted substrate concentration) increased from 18mg/L, 12μgL(-1) and 370mgNL(-)(1) to 31mg/L, 19μgL(-1) and 670mgNL(-)(1), respectively. However, the substrate shock of 2500mgNL(-)(1) for 24h terribly weakened the treatment performance and substrate tolerance ability of the reactor. The results of batch tests indicated that the existence of lag phase made the AAFEB reactor more vulnerable to substrate variation. The SNinf was accurate to be used to monitor the reactor performance and should be maintained below 320mgNL(-)(1) to ensure the absolute stable operation.
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Yanlong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Qigui
authors.initials: Q
authors.lastname: Niu
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Haiyuan
authors.initials: H
authors.lastname: Ma
authors.affiliation: School of Environment Science and Spatial Informatics, CUMT, Xuzhou 221116, China.
authors.forename: Shilong
authors.initials: S
authors.lastname: He
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Kengo
authors.initials: K
authors.lastname: Kubota
authors.affiliation: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan. Electronic address: gyokuyu.ri.a5@tohoku.ac.jp.
authors.forename: Yu-You
authors.initials: YY
authors.lastname: Li
mesh_terms: D064751:Ammonium Compounds / Q000737:chemistry / Q000378:metabolism; D000693:Anaerobiosis; D019149:Bioreactors; D009573:Nitrites / Q000737:chemistry / Q000378:metabolism; D009584:Nitrogen / Q000737:chemistry* / Q000378:metabolism; D010084:Oxidation-Reduction; D061328:Planctomycetales / Q000378:metabolism*; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry
chemical_list: D064751:Ammonium Compounds; D009573:Nitrites; D009584:Nitrogen; D012722:Sewage; D062065:Wastewater
keywords: AAFEB; Anammox; Substrate shock; Substrate tolerance ability; Threshold concentration