Apparatus and method for treating sewage

Abstract From the Canadian patent

An apparatus and method of treating sewage is disclosed. The apparatus includes a modular treating tank which is divided by a perforated baffle or screen into primary and mixing chambers. The mixing zone has a curved or semi-sperical end wall. A mixing and aeration system utilizing a high efficiency ejector withdraws liquid from the mixing chamber and directs the recirculated flow toward the primary chamber across the perforated baffle. In this way, a general circular flow pattern is established from the mixing chamber to the primary chamber across the baffle and return. Thus larger solids are maintained in the primary chamber and are subject to substantially complete organic decomposition …