PURPOSE: To treat sludge efficiently and utilize the resulting reproduced quick lime by mixing sludge and quick lime, dehydrating and drying the mixture, heating the produced solid substances to incinerate organic substances, calcining the slaked lime by the incineration heat of the organic substances to produce the quick lime.
CONSTITUTION: In sludge dehydrating and drying facilities A, B, sewage sludge DM and quick lime S, SS are led to mixers 5a, 5b to react each other, the dehydrated and dried solid components K is further dehydrated and dried completely by maturing apparatuses 6a, 6b, the produced dried powder DK is stored in dry powder hoppers 10a, 10b, and together with the powder in the dried powder hopper 10a, the dried powder DK in the dry powder hopper 10b is stored in a tank lorry TC. In a sludge incinerating facility C, the dried powder KDK is heated to incinerate the organic substances contained in the powder in an incinerating and reproducing furnace 24 and at the same time, the slaked lime is incinerated by the incineration heat of the organic substances to reproduce the quick lime, and the quick lime is stored in a quick lime hopper 31 through a quick lime bag filter 30 and reused in the sludge dehydrating and drying facility B and also used as a raw material of cement.
OGAWA TOSHIO
YASUDA HIROSHI
ONODA ENG