Apparatus and method for processing of animal manure wastewater

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;
• 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);
• and
• second 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 first filtrate output onto said filtration disks (70) for their cleaning.