Apparatus for treating and purifying waste water

Claim 1

An inexpensive, compact, and easily maintained apparatus comprising; means for treating and purifying waste water containing organic pollutants generated by a residential dwelling and for prevents siphoning of effluent from the apparatus and reduces the chance of floating particles from entering the stream of effluent discharged from the apparatus including a. a vertical tank having a closed top end for receiving and containing said waste water and discharging said waste water; b. a vertical clarifying means connected to said vertical tank and located in said vertical tank having said walls which diverge from a bottom opening to a top opening, said bottom opening being smaller than said top opening, said top opening being located above said water level in said vertical tank and beneath said closed top end of said vertical tank; c. air injector means connected to said vertical tank between said vertical tank and said clarifier means for injecting air into the lower portion of said vertical tank to aerate said waste water in said tank, said air injector means including air pump means for supplying air to said vertical tank, said air injector means including vertical air pipe means extending from the upper portion of said vertical tank into the lower portion of and having a lower end with an opening therein for discharging air into the lower portion of said vertical tank; d. inlet means located in the upper portion of said vertical tank for supplying waste water to said vertical tank, and e. outlet means connected to said vertical tank for removing treated water from said vertical tank, said outlet means being located in said clarifying means in the upper portion thereof, said outlet means comprising a horizontal pipe having an inlet end and a discharge end and having a vertical pipe having a top end and a bottom end connected to the inlet end of said horizontal pipe, said vertical pipe being open at said top end and bottom end, said top end of said vertical pipe extending above the level of said waste water and treated water in said vertical tank to prevent siphoning of said waste water from said vertical tank, the bottom end of said vertical pipe extending beneath said level of said waste water and treated water in said vertical tank, said bottom of said vertical pipe extending beneath said level of said waste water and treated water a distance greater than the depth of any scum blanket of floating particles on said waste water and treated water in said clarifier means to reduce the amount of floating particles discharged from said horizontal pipe.