sedimentation channel bottom. stabilization and aeration of sewage i

aeration biodegradable biology bottom building channel clarifier cleaning clearing construction contaminants degradable drainage effluent engineering environment facility feeder filtration flow grease industry methane plant pollution pool purification purified purity rainwater raw recirculation recycle reservoir residual sanitation screw sediement sediment sedimentation sewage sewer sewerage sludge stabilization station tank technology trap treatment vintage waste wastewater water