Patent ID: 7252766
Filing Date: 2007-08-07
Classification: C02F,Y02W

Abstract:
1. A wastewater treatment system comprising; a wastewater collection tank comprising a confined volume, said tank including a wastewater inlet for receiving wastewater containing biodegradable material and an outlet for outflow of treated effluent to a disposal site, said outlet defining the liquid level in the tank, said tank providing a first quiescent zone in the general area of said inlet for settling the major portion of solids from the wastewater to form a liquor in the confined volume of said tank and a second mixing zone in the general area of said outlet, a perforated-wall open-ended reactor pod located in said second zone and submerged in said liquor, said pod being provided with a quantity of buoyant aerobic bacterial growth media, an open ended draft tube supported in the central section of said reactor pod, an air pressure conduit extending from a source of air under pressure and connected to the lower portion of the draft tube for introducing an air pressure stream providing a pumping force to pull liquor upwardly therethrough and to expel liquor in an aerating splash pattern from the top of the draft tube, said pumping force being sufficient to form said splash pattern so as to return a first given portion of aerated liquor onto the media within the pod and a second substantial portion to the general area of said second zone adjacent the reactor pod for recirculation by said draft tube, said perforated wall of the pod permitting free exchange of mixed and unmixed liquor between the pod and media and the general volume of the tank, said treated recirculated liquor effluent being allowed to freely flow out of the tank through said outlet to maintain a constant liquid level in the tank.