BIOLOGICAL MEMBRANE SUPPORT FOR TREATING WASTE WATER

摘要

PURPOSE:To efficiently treat waste water by constructing a support so as to form a membrane on which aerobic bacteria propagate preferentially on the outer surface and a membrane on which anaerobic bacteria propagate preferentially in the hollow part. CONSTITUTION:A biological membrane support 1 made of a hollow said body having an internal space which communicates with the outer surface through many pores 2 is immersed in waste water in a treatment tank under aeration. An aerobic biological membrane is formed in the vicinity of the outer surface of the support 1. Dissolved oxygen in the waste water permeating into the support 1 through the pores 2 is consumed by aerobic bacteria, the hollow 3 in the support 1 becomes an anaerobic state and anaerobic bacteria propagate preferentially in the hollow 3. Biological membranes can stably be formed over a long period by impregnating glucose or heptone into the support.