| 摘要 |
<p>PURPOSE:To shorten the starting period, promote self-granulating in a tank after start and accelerate waste water treatment by circulating forcibly bio-gas generated in the tank from the upper section to the lower section of the tank. CONSTITUTION:A gas circulating flow pipe 7 is provided above a gas collection wall 5 and connected with an air diffuser 9 provided with said gas circulating flow pipe 7 in the lower section in a tank through an air pump 8. At the starting time of waste water treatment, the gas circulating flow pipe 7 is used, and bio-gas N generated in the tank at the time of treatment is fed forcibly from the air diffusion device 9 by means of the air pump 8, and as the inside of the tank is stirred by the rising flow of bio-gas 11, the formation of self- granulating sludge is accelerated at the starting time to shorten the starting period.</p> |
