| 摘要 |
PURPOSE:To obtain sludge treating equipment without increasing the material to be treated due to addition of chemicals by forming the equipment with an external pressure-type filter membrane module arranged respectively in the tank main bodies of the biological treating device and concentrator and a diffuser pipe arranged below the module. CONSTITUTION:Raw water (a) is introduced into a biological treating device 1 and treated with the air supplied from a first diffuser pipe 4. In this case, the water (b) is forcedly drawn off by a first membrane module 3, and the concd. sludge (c) is supplied to a concentrator 5. The sludge (c) is agitated by the air from a second diffuser pipe 10, and the water (d) is drawn off by a second membrane module 9. The highly concentrated sludge (e) is drawn off from the bottom and sent to a dehydrator. As a result, since the sludge is concentrated without adding chemicals, the material to be treated is not increased after concentration, and the succeeding treatment is efficiently performed. |
