| 摘要 |
<p>PURPOSE:To provide the circulation type sewage purifying device of a compact constitution, which can display a sufficient purification treatment capacity in conformity with a degree of sewage without executing a design change of the whole purifying equipment. CONSTITUTION:The circulation type sewage purifying device is provided with a housing 12 installed in a water tank 14 by dipping a part thereof into the water. In the inside of this housing 12, a contact material 24 allowing a microorganism to adhere to the surface and increasing it, and a diffuser tube 30 for exhausting compressed air as small foam are disposed. In such a state, when the diffuser tube 30 exhausts foam, sewage in the water tank 14 flows into the housing from an inflow port 16, passes through the vicinity of the contact material, and thereafter, an ascending water flow which flows out of an outflow port 18 is generated.</p> |
