| 摘要 |
<p>PURPOSE:To increase the efficiency of digestion of excess sludge from a sewage treating process by decomposing the sludge by oxidation with ozone. CONSTITUTION:Air is sent to an ozonizer 4 through a compressor 2 and a moisture remover 3. Ozone generated in the ozonizer 4 is sent to an ejector 9. Excess sludge accumulated in a storage tank 6 is fed into the ejector 9 by a sludge feeding pump 7 and introduced into an ozone reaction vessel 5 together with the sent ozone. In the vessel 5, the sludge is brought into contact with the ozone, decomposed by oxidation, subjected to vapor-liq. separation and sent to a post-treating process 13 such as an anaerobic digesting process. Gas obtd. by the separation is fed into an apparatus 12 for treating waste ozone, the residual ozone is treated and the gas is discharged into the air. Thus, secondary pollution is prevented.</p> |
