Treatment of Aquatic Products Processing Wastewater with a Reformative MBR Process

An experiment of a reformative MBR process that a combined process of "biological contact oxidation and micro- filtration (MF) membrane" was conducted for the treatment of aquatic products processing wastewater. The experiment results showed that the combined process for waste water the reduction rates of the COD_Cr reached 95%, and NH₄-N was in the range of 40~50%. HRT played an important part in biological removal of COD_Cr, but when it comes to the whole system, its effect was not too visible. The combined process also performed excellently in the removal of SS and turbidity. In the effluent SS almost can\´t be detected and the turbidity was with a mean value of 2.68 NTU. In addition, compared with the normal MBR, which is combined by activated sludge and membrane, this combination can alleviate the problem of membrane fouling obviously.