Biological liq. effluent treatment plant - contg. series of aeration pipes, liq. preheater and premixer or preaerator

摘要

Purification plant, pref. a sedimentation pond for biological effluent purification, in which circulating water which has pref. been premixed with oxygen (or air) in a mixer and pumped into the effluent through pipes and nozzles at a series of positions is supplied.