A novel approach to evaluate the permeability of cake layer during cross-flow filtration in the flocculants added membrane bioreactors.
In order to obtain a better understanding of the cake layer formation mechanism in the flocculants added MBRs, a model was developed on the basis of particle packing model considering cake collapse effect and a frictional force balance equation to predict the porosity and permeability of the cake layers. The important characteristic parameters of the flocs (e.g., floc size, fractal dimensions) and operating parameters of MBRs (e.g., transmembrane pressure, cross-flow velocity) are considered in this model. With this new model, the calculated results of porosities and specific cake resistances under different MBR operational conditions agree fairly well with the experimental data.
Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
Hanmin
H
Zhang
Jifeng
J
Gao
Tao
T
Jiang
Dawen
D
Gao
Shurong
S
Zhang
Hongyan
H
Li
Fenglin
F
Yang
D057219:Biofouling; D019149:Bioreactors; D003198:Computer Simulation; D005374:Filtration / Q000295:instrumentation* / Q000379:methods*; D005427:Flocculation; D017709:Fractals; D008567:Membranes, Artificial; D008956:Models, Chemical; D010539:Permeability; D016062:Porosity; D013499:Surface Properties
D008567:Membranes, Artificial