The foulings of membranes are very serious problem. in activated sludge processes.
In this paper, the extracting and seperation methods of the fouling substances have been examined and discussed when the ultrafilter membrane was applied to the activated sludge process for artificial night soil.
The fouling of membrane occ ured both on the surface and in the pores. The fouling substances were extracted into phosphate buffer solutions or interfacial active agents. Biochemical substances were detected with liquid chromatography at 215 nm of UV. The biochemical substances on the surface of membrane are probably peptides with thousands of molecular weights and the glycoproteins with millions of molecular weights. And the biochemical substances in the pores of membrane may be similar to the peptides on the surface.
