Effect of Particle Size Distributions of Activated Sludges on Cross-Flow Microfiltration Flux for Submerged Membranes

概要

論文の詳細を見る
The influence of the sludge treatment histories on the cross-flow microfiltration fluxes of submerged membranes was examined using 20 types of sludges such as intermittenlty aerated, continuously aerated activated sludges and anaerobically digested sludges. The fluxes of the sludges varied from 0.5 to 1.7m^3・m^<-2>・d^<-1> under the same MLSS and filtration conditions. The variation of the flux was not explained by the different physical propertes of the sludges such as mean particle sizes, viscosities and specific filtration resistances. Instead, the variation of the flux was quantitatively interpreted by considering the concentration of particles with sizes from 8 to 15 μm, which cause the lowest lift velocity values. The assumption, that the particles of this specific size range controlled the flux, was rationalized by the filtration model proposed for the filtration of the mixture of differently sized particles.
公益社団法人日本生物工学会の論文
1997-06-25