초록 ▼

According to the present invention, there is provided a wastewater processing apparatus and method comprising a rotating filter thickener (20) receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output, a screw press thickener (24) receiving the firs

According to the present invention, there is provided a wastewater processing apparatus and method comprising a rotating filter thickener (20) receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output, a screw press thickener (24) receiving the first sludge output and forming a final sludge output and a second filtrate output, a dissolved air floatator (46) receiving the first filtrate output from the rotating filter thickener (20) and producing a first solid output and a third filtrate output. The wastewater processing apparatus and method further comprising a first conductor (10, 12, 29) for mixing incoming raw manure wastewater and the second filtrate output from the screw press thickener (24) to produce the wastewater mixture for input to the rotating filter thickener (20), and a second conductor (34) for branching off a part of the first filtrate output to a spray cleaner (38) for spraying the part of the first filtrate output onto the filtration disks (70) for their cleaning.

대표청구항 ▼

The invention claimed is: 1. A wastewater processing apparatus comprising: a rotating filter thickening means (20) comprising a number of rotating coaxial filtration disks (70) for receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output; a screw

The invention claimed is: 1. A wastewater processing apparatus comprising: a rotating filter thickening means (20) comprising a number of rotating coaxial filtration disks (70) for receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output; a screw press thickening means (24) comprising a rotating screw (90) for receiving the first sludge output and forming a final sludge output and a second filtrate output; and a dissolved air floatation means (46) for receiving the first filtrate output from the rotating filter thickening means (20) and producing a first solid output and a third filtrate output. 2. The apparatus of claim 1, comprising a first conducting means (10, 12, 29) for mixing incoming raw manure wastewater and the second filtrate output from the screw press thickening means (24) to produce the wastewater mixture for input to the rotating filter thickening means (20). 3. The apparatus of claim 1, comprising a conducting means (34) for branching off part of said first filtrate output to a spray cleaning means (38) for spraying said branched part of said filtrate onto said filtration disks (70) for their cleaning. 4. The apparatus of claim 2, comprising a conduct (47) for feeding the first solid output from said dissolved air floatation means (46) to said first conducting means (10, 12, 29) for mixing said first solid output with said wastewater mixture. 5. The apparatus of claim 1, wherein said coaxial filtration disks (78) of said rotating filter thickening means (20) rotate from about 5 to about 15 revolutions per minute, controlled depending on wastewater level inside said rotating filter thickening means (20). 6. The apparatus of claim 1, wherein said screw thickening means (24) includes swiveling plates (100) actuated by plate actuating means (104) for establishing an adjustable cross section to control the pressure exerted by the screw press thickening means (24) on the first sludge output which is controlled depending on inside substance level at the screw press thickening means (24). 7. The apparatus of claim 1, further comprising a third filtration means (50) that receives and filters the third filtrate output from the dissolved air floatation means (46) to produce a second solid output and a final filtrate output. 8. The apparatus of claim 7, wherein said third filtration means (50) is a sand filter. 9. The apparatus of claim 7, wherein said third filtration means (50) comprises a rotating conical wire basket onto which the incoming third filtrate is sprayed. 10. The apparatus of claim 7, comprising a conduct (52) for feeding said second solid output of said third filtration means (50) to the input of the dissolved air floatation means (46). 11. The apparatus of claim 1, comprising a separation means (16) that receives the wastewater mixture and separates heavy particles therefrom before the wastewater mixture is fed to the rotating filter thickening means (20). 12. The apparatus of claim 11, wherein said separation means (16) comprises tangentially arranged input (14) and output (18) tubing to a basically cylindrical chamber (60) producing a spirally upwardly revolving motion to the wastewater mixture allowing heavy particles to sink to the bottom of said chamber (60). 13. The apparatus of claim 11, comprising a feed tank (12) with a first input tube (10) for the incoming raw manure wastewater and, a second input tube (29) for the second filtrate from said screw press thickening means (24) and an output tube (14, 18) connected to said rotating filter means (20) or said separation means (16). 14. The apparatus of claim 3, comprising a filtrate tank (32) having an input tube (30) for receiving the first filtrate output from said rotating filter thickening means (20) and a first output tube (44) for providing a first portion of the first filtrate output to said dissolved air floatation means (46) and a second output tube (34) for providing a second portion of the first filtrate output to at least one spray nozzle device of the spray cleaning means (38). 15. The apparatus of claim 14, further comprising a fresh water tube (40) connected to the second output tube (34) for introducing fresh water to the at least one spray nozzle device of the spray cleaning means (38). 16. The apparatus of claim 14, wherein said rotating filter thickening means (20) includes 2 to 20 disks (70) each comprising a rigid structure and including a wire mesh of a predetermined mesh size. 17. The apparatus of claim 16, wherein said rotating filter thickening means (20) further includes a spray pipe (84) connected to said at least one spray nozzle device of the spray cleaning means (38), the at least one spray nozzle device directed to the wire mesh for cleaning/rinsing. 18. A method for processing animal manure wastewater into a filtrate and sludge comprising: subjecting a wastewater mixture to a rotating filter thickening means (20) comprising a number of rotating coaxial filtration disks (70), wherein part of the liquid of said wastewater mixture passes through said filtration disks (70) forming a first filtrate output and a first sludge output; compressing said first sludge output in a screw press thickening means (24) comprising a rotating screw to form a second filtrate output and a final sludge output; and subjecting said first filtrate output to a dissolved air floatation process producing a first solid output and a third filtrate output. 19. The method of claim 18, further comprising mixing said second filtrate output with a raw manure wastewater to produce said wastewater mixture. 20. The method of claim 18, further comprising branching off and spraying a part of said first filtrate output onto said filtration disks for their cleaning. 21. The method of claim 18, further comprising filtering the third filtrate output to produce a final filtrate output. 22. The method of claim 18, further comprising collecting the first solid output of said dissolved air floatation process, and mixing the collected first solid output with said wastewater mixture. 23. A wastewater processing apparatus comprising: a rotating filter thickening means (20) comprising a number of rotating coaxial filtration disks (70) for receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output; a screw press thickening means (24) comprising a rotating screw (90) for receiving the first sludge output and forming a final sludge output and a second filtrate output; a dissolved air floatation means (46) for receiving the first filtrate output from the rotating filter thickening means (20) and producing a first solid output and a third filtrate output; and a conducting means (10, 12, 29, 47) for mixing incoming raw manure wastewater, the second filtrate output from the screw press thickening means (24) and the first solid output from the dissolved air floatation means (46) to produce the wastewater mixture for input to the rotating filter thickening means (20).