TERTIARY TREATMENT OF IN-TANK SEPTIC SEWAGE

摘要

The present invention concerns a means of providing tertiary treatment to incoming raw sewage to the septic tank. This is accomplished by providing an improved type sewage treatment container having three tertiary treatment chambers. In a first treatment chamber an artifial turbulent area is created containing therein a quantity of selected sorptive coal fines. Incoming raw sewage if directed towards the turbulent area wherein it is intermixed with the sorptive coal fines. Periodically the effluent from the first chamber is passed into the second chamber wherein second stage sedimentation occurs. The effluent from the second chamber is then passed into a third sedimentation chamber wherein third stage sedimentation occurs, the settled sludge from the third sedimentation chamber is passed by means of a steeply sloped floor down through an opening in the lower portion of the second and third divider wall of the sedimentation chambers, the effluent from the said third sedimentation chamber is then discharged as treated effluent by the outlet means to surface waters.