SEWAGE WATER CLEANING METHOD

摘要

FIELD: cleaning of municipal sewage at small and large plants. SUBSTANCE: method involves treating sewage water with active silt in aeration tanks and secondary settling tanks with following additional cleaning by providing contact with higher aquatic plants available in flow-through channel, with Najas microdon being used as higher aquatic plant. Daily sewage water flow rate is set on condition that about 2.4 g of nitrogenous substances and 0.5 g of phosphates are used per 1 kg of plant weight. Water temperature in channel is maintained within the range of +12 - +20 C. Each 20 days 15% of plant mass is removed from reservoir. EFFECT: increased efficiency in cleaning sewage water by saturating water with oxygen and reduced cost of refinery construction.