| 摘要 |
<p>PURPOSE:To increase the amt. of bacteria stuck to carrier granules and to enhance the ability to remove org. matter by introducing waste water at a specified velocity into an anaerobic fluidized bed reactor packed with expanded lightweight aggregate granules having a specified average diameter and a specified oven-dry specific gravity. CONSTITUTION:An anaerobic fluidized bed reactor is formed by packing with expanded lightweight aggregate granules having 0.3-0.6mm average diameter, 1.0-1.2 oven-dry specific gravity and >=5mum average pore diameter. Waste water is introduced into the reactor and treated by passing through the reactor at a velocity between the velocity at which the fluidization of the granules is started and 10m/hr. For example, raw water is fed into fluidized beds 1, 2, 3 and passed through the beds 1, 2, 3 by circulation pumps 4, 5, 6 at 0.5m/hr velocity which is lower than the velocity at which the fluidization of the granules is started, 5m/hr velocity which is slightly higher than the velocity at which the fluidization of the granules is started and 10m/hr velocity, respectively.</p> |
