Membrane bioreactor and method for the biological treatment of oily wastewater

摘要

A biological waste water treatment reactor has an inlet for water effluent containing oil pollution, a reactor chamber for an activated treatment station and an outlet. The reactor outlet has a filter in or alongside the activated treatment stage. The filter is a bio-membrane filter. The filter is a cross-flow suction or pressure micro-filter operated in the pressure differential range 0.1 to 0.3 bar. Water is sucked from the base zone of the reactor by a pump. The filter has a return tube to the reactor for concentrated clear water. An independent claim is included for a commensurate process for operating the reactor.