Sewage treatment system

Claim 2

A PORTABLE, SMALL VOLUME SEWAGE PROCESSING SYSTEM ADAPTED FOR USE IN WATERCRAFT, MOBILE EQUIPMENT AND WHERE SEWAGE TREATMENT FACILITIES ARE NOT AVAILABLE COMPRISING, IN COMBINATION, MEANS FOR RECEIVING, MACERATING AND DELIVERING SEWAGE TO A MIXING TANK, AT LEAST ONE MIXING TANK DISPOSED AND CONNECTED TO RECEIVE MACERATED SEWAGE WHICH INCLUDES OPPOSING GENERALLY VERTICAL WALLS, SAID WALLS HAVING A PLURALITY OF DOWNWARDLY SLOPING VANES EXTENDING THEREFROM AT A PREDETERMINED ANGLE WITH RESPECT TO THE VERTICAL IN ALTERNATING DISPOSITION SUCH THAT MATERIAL FALLING FROM ONE VANE IMPINGES UPON AN ALTERNATE LOWER VANE EXTENDING FROM AN OPPOSING WALL, AT LEAST ONE SETTLING TANK DISPOSED AND CONNECTED TO RECEIVE SEWAGE FROM THE MIXING TANK FOR PERMITTING THE SEPARATION OF SOLID SEWAGE COMPONENTS FROM LIQUID SEWAGE COMPONENTS, THE SETTLING TANK INCLUDING OPPOSED UPRIGHT WALLS HAVING A PLURALITY OF DOWNWARDLY SLOPING VANES EXTENDING THEREFROM AT A PREDETERMINED ANGLE WITH RESPECT TO VERTICAL IN ALTERATION DISPOSITION SUCH THAT MATERIAL FALLING FROM ONE VANE IMPINGES UPON A LOWER ALTERNATE VANE EXTENDING FROM THE OPPOSING WALL, WITH SOLID MATERIAL FALLING FROM THE BOTTOM OF SUCH VANES AND BEING COLLECTED IN THE BOTTOM OF THE SETTLING TANK FOR PERIODIC REMOVAL, A FILTER TANK CONNECTED FOR RECEIVING CLARIFIED SEWAGE FROM THE SETTLING TANK THE FILTER TANK INCLUDING AN INPUT FILTER THROUGH WHICH THE CLARIFIED SEWAGE FLOWS INTO THE FILTER TANK AND AN OUTPUT FILTER THROUGH WHICH CLARIFIED AND DISINFECTED SEWAGE FLOWS FROM THE FILTER TANK, MEANS FOR INJECTING COAGULENT INTO THE SEWAGE IN THE MIXING TANK AND IN THE SETTLING TANK, MEANS FOR INJECTING OXYGEN INTO THE MIXIN AND SETTLING TANKS AT A POINT BELOW THE ALTERNATING VANES THEREIN, AN MEANS FOR INJECTING BACTERICIDE INTO THE FILTER TANK, THE OUTPUT FILTER IN SAID TANK BEING SO COMPOSSED AND CONSTRUCTED AS TO ABSORB BACTERICIDE THUS PROVIDING A LARGE SURFACE CONTACT AREA BETWEEN THE BACTERICIDE AND THE SEWAGE AND A RESERVOIR OF BACTERICIDE IN THE FILTER TANK, THE VANES IN THE MIXING TANK BEING SO SPACED AND ANGULARLY DISPOSED AS TO CAUSE TRUBULENT FLOW AT THE POINT OF WHICH THE SEWAGE FLO TURNS TO DIRECT HEAVY SOLID PARTICLES TO THE BOTTOM OF THE TANK FOR BACTERIAL DIGESTION, TO DIRECT A CLOUD OF FLOCULATED SEWAGE TO THE BOTTOM OF THE TANK, AND TO FORM POCKETS OF OXYGEN BENEATH SAID VANES TO PROVIDE CONSTANT CONTACT BETWEEN OXYGEN AND THE SEWAGE UNDER TREATMENT.

Claim 3

The sewage processing system as set forth in claim 1 wherein the vanes in the mixing tank extend downwardly from the walls at an angle with respect to vertical walls from about 60* to about 25* and wherein the means for delivering the sewage to the mixing tank injects the sewage into the tank at a rate to cause the sewage to flow across the vanes at a velocity of from about 0.08 feet per second to about 2.1 feet per second.

Claim 4

The sewage processing system as set forth in claim 2 wherein the input filter is a coarse filter for preventing passage of particles greater than about 20 microns in size and is so constructed as to provide a surface on which biodegradable materials accumulate and continue to digest.

Claim 5

The sewage process system as set forth in claim 3 wherein; the input filter is constructed of alternate layers of activated charcoal and foraminous material; and the second filter is constructed of alternate layers of activated charcoal and foraminous material.

Claim 6

A portable, small volume sewage processing system adapted for use in watercraft, mobile equipment and where sewage treatment facilities are not available comprising, in combination: means for receiving, macerating and delivering sewage to a mixing tank at a predetermined rate; a plurality of mixing tanks connected in series for receiving macerated sewage at a predetermined rate, said mixing tanks having two chambers separated by generally vertical divider wall and defined by opposing generally vertical side walls with a plurality of at least four vanes sloping downwardly at an angle from about 60* to about 25* from the divider wall and from the side walls in alternating disposition such that material falling from the vane impinges onto the next lower vane which extends from an opposing wall, the walls being so spaced and the vanes being so constructed and spaced as to result in strongly turbulent flow in the area where the sewage is forced by the vanes and the walls to turn, the predetermined rate being such as to cause the sewage to flow over the vanes at a velocity of from about 0.08 feet per second to about 2.1 feet per second, the dividing wall being so constructed as to permit flow from the lower portion of of the first chamber to the lower portion of the second chamber, tHe sewage being delivered into the top portion of the first chamber, flowing downwardly over the vanes at said velocity and the first chamber, flowing to the second chamber and upwardly over the vanes at the velocity in the second chamber and flowing from the upper portion of the second chamber; a settling tank connected to receive sewage from the last mixing tank, to separate solid sewage components from liquid sewage components; a filter tank connected for receiving clarified sewage from the settling tank, the filter tank including an input filter through which the clarified sewage flows into the filter tank and an output filter through which clarified and disinfected sewage flows from the filter tank; means for injecting coagulent into the sewage in the mixing tank and in the settling tank; means for injecting oxygen into the mixing and settling tanks at a point below the alternating vanes therein; and means for injecting bactericide into the filter tank; the output filter in said tank being so composed and constructed as to absorb bactericide thus providing a large surface contact area between the bactericide and the sewage and a reservoir of bactericide in the filter tank; the vanes in the mixing tank being so spaced and angularly disposed as to cause turbulent flow at the point at which the sewage flow turns, to direct heavy solid particles to the bottom of the tank for bacterial digestion, to direct a cloud of floculated sewage to the bottom of the tank, and to form pockets of oxygen beneath said vanes to provide constant contact between oxygen and the sewage under treatment.

Claim 7

A portable, small volume sewage processing system adapted for use in watercraft, mobile equipment and where sewage treatment facilities are not available comprising, in combination: means for receiving, macerating and delivering sewage to a mixing tank at a predetermined rate; a plurality of mixing tanks connected in series for receiving macerated sewage at a predetermined rate, said mixing tanks having two chambers separated by generally vertical divider wall and defined by opposing generally vertical side walls with a plurality of at least four vanes sloping downwardly at an angle from about 60* to about 25* from the divider wall and from the side walls in alternating disposition such that material falling from the vane impinges onto the next lower vane which extends from an opposing wall, the walls being so spaced and the vanes being so constructed and spaced as to result in strongly turbulent flow in the area where the sewage is forced by the vanes and the walls to turn, the predetermined rate being such as to cause the sewage to flow over the vanes at a velocity of from about 0.08 feet per second to about 2.1 feet per second, the dividing wall being so constructed as to permit flow from the lower portion of of the first chamber to the lower portion of the second chamber, tHe sewage being delivered into the top portion of the first chamber, flowing downwardly over the vanes at said velocity and the first chamber, flowing to the second chamber and upwardly over the vanes at the velocity in the second chamber and flowing from the upper portion of the second chamber; a settling tank connected to receive sewage from the last mixing tank, to separate solid sewage components from liquid sewage components; a filter tank connected for receiving clarified sewage from the settling tank, the filter tank including an input filter through which the clarified sewage flows into the filter tank and an output filter through which clarified and disinfected sewage flows from the filter tank; means for injecting coagulent into the sewage in the mixing tank and in the settling tank; means for injecting oxygen into the mixing and settling tanks at a point below the alternating vanes therein; and means for injecting bactericide into the filter tank; the output filter in said tank being so composed and constructed as to absorb bactericide thus providing a large surface contact area between the bactericide and the sewage and a reservoir of bactericide in the filter tank; the vanes in the mixing tank being so spaced and angularly disposed as to cause turbulent flow at the point at which the sewage flow turns, to direct heavy solid particles to the bottom of the tank for bacterial digestion, to direct a cloud of floculated sewage to the bottom of the tank, and to form pockets of oxygen beneath said vanes to provide constant contact between oxygen and the sewage under treatment.

Claim 8

The sewage processing system as set forth in claim 5 wherein the input filter is a coarse filter for preventing passage of particles greater than about 20 microns in size and is so constructed as to provide a surface on which biodegradable materials accumulate and continue to digest.

Claim 9

The sewage process system as set forth in claim 6 wherein; the input filter and output filter are constructed of alternate layers of activated charcoal and foraminous material and wherein; the filter tank includes a removable top and the input and output filters are so constructed and attached as to be removable with the top for cleaning and replacement.