Patent ID: 6488851
Filing Date: 2002-12-03
Classification: C02F,Y02W

Abstract:
A biological reactor for treating sewage, said reactor being void of any artificial aeration or agitation means and comprising:(a) at least one array of successive aerobic and anaerobic compartments having liquid passage therebetween for, respectively, aerobic and anaerobic degradation of biodegradable substances in said sewage, each compartment having a bottom, side walls and an open top area between said side walls; (b) each pair of successive aerobic and anaerobic compartments having a common partition wall via which said liquid passage is provided, wherein i) the liquid passage from an aerobic compartment to its adjacent succeeding anaerobic compartment is provided through a slot at the bottom of their common wall; and ii) the liquid passage from an anaerobic compartment to its adjacent succeeding aerobic compartment is provided by means of gravity-caused liquid flow over their common wall.