title: An upflow microaerobic sludge blanket reactor operating at high organic loading and low dissolved oxygen levels.
abstract: The activated sludge process (ASP) has high operational costs due to the need for aeration at dissolved O(2) (DO) levels of ≥2 mg l(-1) and high capital costs to construct large reactors due to a low organic loading [typically 1 kg chemical oxygen demand (COD) m(-3) day(-1)]. A novel method for improving the energy use and treatment efficiency of the ASP via limited oxygenation (0.4 mg DO l(-1)) and high organic loading (6.2 kg COD m(-3) day(-1)) is proposed based on a laboratory-scale ASP for ammonia-rich industrial wastewaters. The sludge blanket phenomenon and granulation occurred simultaneously in the upflow microaerobic reactor.
authors.affiliation: MOE Key Laboratory of Water and Sediment Sciences/State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China. zshaokui@yahoo.com.cn
authors.forename: Shaokui
authors.initials: S
authors.lastname: Zheng
authors.forename: Huijun
authors.initials: H
authors.lastname: Li
authors.forename: Cancan
authors.initials: C
authors.lastname: Cui
mesh_terms: D001420:Bacteria, Aerobic; D019149:Bioreactors; D010100:Oxygen / Q000737:chemistry; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid
chemical_list: D012722:Sewage; D010100:Oxygen