On-site wastewater treatment system

Details On-site wastewater treatment system On-site wastewater treatment system

C - Chemistry, Metallurgy

02

F

362/4

C02F 3/30 (2006.01)

Patent

CA 1152657

21 ON-SITE WASTEWATER TREATMENT SYSTEM Abstract An on-site wastewater treatment system is disclosed suitable for treatment of domestic or other sewage. Incoming wastewater is passed into a septic tank (1) with the effluent then passed into a basin (3) holding particles of a media (5) through which the effluent travels. The media (5) removes a substantial amount of the suspended solids in the effluent and some of the BOD (biological oxygen demand material). The filtrate is collected in a recirculating tank (7) and then pumped by pump 8 for dispersal, preferably by spraying through nozzles placed above the surface of the same media (5) for travel therethrough a second time. The media (5) retains the effluent until the surface tension of the efflu- ent between the particles of the media (5) is overcome by gravity, at which time it is displaced from the media (S) and discharged. During the retention time, aerobic action in the media (5) reduces the bacterial count of the effluent signi- ficantly. The effluent from the septic tank (1) is preferab- ly alternately distributed between a first area (4a) of the media (5) and a separate second area (4b) of the media (5) in order to allow continuous regeneration of the media (5) by avoiding a continuously ponded condition and by the action of the aerated effluent.

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