High Rate Biological / Chemical Treatment Based on the Moving Bed Biofilm Process Combined with Coagulation

Abstract

A high-rate wastewater treatment process for secondary treatment has been investigated. This process consists of a highly loaded moving bed biofilm reactor directly followed by a coagulation/floc separation step. It is demonstrated that the biofilm in such a process mainly deals with the soluble organic matter while coagulation deals with the particulate/colloidal matter. The bioreactor may, therefore, be designed based on the soluble COD loading only, resulting in a very compact plant, especially when a compact separation reactor (i.e. filtration) is used as well