title: Tolerance to organic loading rate by aerobic granular sludge in a cyclic aerobic granular reactor.
abstract: Sodium acetate as carbon source, tolerance to organic loading rate (OLR) by aerobic granular sludge in a cyclic aerobic granular reactor (CAGR) was investigated by gradually increasing the influent COD. AGS could maintain stability in the continuous flow reactor under OLR⩽15kg/m(3)d in the former 65 days, and SVI, granulation rate, average particle size and water content was 21 ml/g, 98%, 1.8mm and 97.2% on the 65th day. However, AGS gradually disintegrated after the 66 th day when OLR increased to 18 kg/m(3)d, and granules' properties deteriorated rapidly in a short time. High removal rates to pollutants were achieved by CAGR in the former 65 days, but the removal rates of pollutants dropped sharply from the 66 th day. With the increase of OLR and particle size, anaerobic cores inside the granules were formed by massive dead cells, while instability of anaerobic core eventually led to the collapse of the system.
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
authors.forename: Bei
authors.initials: B
authors.lastname: Long
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China. Electronic address: 15007173775@163.com.
authors.forename: Chang-Zhu
authors.initials: CZ
authors.lastname: Yang
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
authors.forename: Wen-Hong
authors.initials: WH
authors.lastname: Pu
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
authors.forename: Jia-Kuan
authors.initials: JK
authors.lastname: Yang
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
authors.forename: Fu-Biao
authors.initials: FB
authors.lastname: Liu
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Cheng
mesh_terms: D000332:Aerobiosis; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D009584:Nitrogen / Q000302:isolation & purification; D010316:Particle Size; D019346:Sodium Acetate / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D009584:Nitrogen; D019346:Sodium Acetate; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Aerobic granular sludge; Continuous flow; Cyclic; Organic loading rate; Tolerance