Design the primary sedimentation tank, anaerobic and aerobic digestion units and final sedimentation tank of a 3-state system for a swine manure plant. The farm consists of 10,000 swine with average weight of 60kg, and the daily cleaning water is 4 times the amount of raw manure. The swine are raised on traditional flat floor pens, and the wastewater are collected in a ditch outside the pens. The final effluent BOD, COD, and SS should be lower than 80pm, 600pm, and 150ppm respectively.