| 摘要 |
<p>PURPOSE:To reduce the vol. of garbage while purifying waste water by allowing raw water to be treated to flow through a suspended filter bed packed with a suspended filter material to coarsely granulate oil droplets contained in raw water and floating coarse oil particles to separate and recover the same. CONSTITUTION:Waste water discharged from a kitchen flows in a tank 1 through a waste water inflow pipe 4 to be mixed with thrown-in garbage and the resulting mixture is stagnated in the tank to be subjected to anaerobic fermentation due to anaerobic bacteria and the org. matter component in the mixture is decomposed and nitration/denitrification is also performed. By this method, the greater part of the solid org. matter is liquefied to be gradually sent to a tank 2 through the communication pipe 6 provided to the upper part of the tank 1 to be again subjected to anaerobic treatment. A suspended filter bed 10 partitioned by a filter material holding strip 8 and packed with a suspended filter material 9 is formed under the surface of the water in the tank 2 and the coarse granulation of oil droplets is advanced in the upper bed part of the suspended filter bed 10 and a oil component is floated to form an oil layer 11. The mixed soln. treated in the tank 2 is sent to a tank 3 from the communication pipe 13 provided to the bottom part of the tank 2 to be subjected to aerobic treatment.</p> |
