title: Flow patterns of super-high-rate anaerobic bioreactor.
abstract: The super-high-rate anaerobic bioreactor (SAB) possesses outstanding potential to treat concentrated wastewater. The flow patterns of SAB were investigated through tracer pulse stimulus-response technique and cold-model tests. The flow patterns were demonstrated to be analogous to plug flow at low loading rate and to completely mixed flow at super-high loading rate. Mean dead spaces of SAB caused by biomass and hydraulic behavior were 6.98 % and 21.01 %, respectively. The relationship among the hydraulic dead spaces (V(h)), the volumetric hydraulic loading rate (L) and the volumetric biogas production rate (G) was represented by: V(h)=0.7603 L+0.1627 G - 4.0620. The V(h) was greatly influenced by G over L value. The volumetric efficiency could further be improved when SAB was operated at super-high loading rate. The volume ratio of V(N) and V₁ decreased as N increased and the optimum N was 3.00 or so.
authors.affiliation: Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China.
authors.forename: Xiao-guang
authors.initials: XG
authors.lastname: Chen
authors.forename: Ping
authors.initials: P
authors.lastname: Zheng
authors.forename: Yan-jie
authors.initials: YJ
authors.lastname: Guo
authors.forename: Qaisar
authors.initials: Q
authors.lastname: Mahmood
authors.forename: Chong-jian
authors.initials: CJ
authors.lastname: Tang
authors.forename: Shuang
authors.initials: S
authors.lastname: Ding
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D008962:Models, Theoretical