title: Physical characteristics and formation mechanism of denitrifying granular sludge in high-load reactor.
abstract: The physical characteristics of denitrifying granular sludge and their granulation mechanism were investigated in two denitrifying reactors (R1 and R2). The results showed that the denitrifying granular sludge was streamlined in shape with the aspect ratio (AR) of 0.62 ± 0.05, large in size with the diameter of 2.39 ± 0.05 mm, and fast in settlement with the average settling velocity (VS) of 126.36 ± 13.32 m/h at the nitrate loading rate (NLR) of 35.14 ± 0.38 kg/(m(3)d). The dominance of denitrifying granular sludge with good settleability was attributed to the enhanced growth of granular sludge by extracellular polymers (EPS) and the shaping of granular sludge by shear force.
authors.affiliation: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: Zheng
authors.forename: Lan
authors.initials: L
authors.lastname: Wang
authors.forename: Meng
authors.initials: M
authors.lastname: Zhang
authors.forename: Huifeng
authors.initials: H
authors.lastname: Lu
authors.forename: Yajuan
authors.initials: Y
authors.lastname: Xing
authors.forename: Jiqiang
authors.initials: J
authors.lastname: Zhang
authors.forename: Ru
authors.initials: R
authors.lastname: Wang
authors.forename: Ji
authors.initials: J
authors.lastname: Song
authors.forename: Abbas
authors.initials: A
authors.lastname: Ghulam
mesh_terms: D019149:Bioreactors; D058440:Denitrification; D009584:Nitrogen / Q000302:isolation & purification; D010316:Particle Size; D012722:Sewage
chemical_list: D012722:Sewage; D009584:Nitrogen
keywords: Denitrification; Formation mechanism; Granular sludge; High-load; Physical characteristics