| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the danger of environmental pollution by, in the case the quantity of waste ready-mixed concrete is small, after coarse aggregate and fine aggregate are separated and recovered, leading it to an agitating tank and dehydrating the obtained sludge water by a filter press. SOLUTION: When treating waste ready-mixed concrete, in a small quantity treating process performed in the case the quantity of the waste ready-mixed concrete is small, by feeding washing water 2 into a drum mounted on a concrete mixer truck 1, residual ready-mixed concrete, or the like is washed. The waste water is received by a chute 3 and is fed to a vibrating screen 5 by a fixed quantity feeding device 4, and coarse aggregate 9 is separated there, and sludge 6 containing fine aggregate is caused to flow down to a sludge tank 7 and the coarse aggregate 9 is recovered in a gravel yard 10 by a conveyor 8. On the other hand, sludge water containing cement hydrate is led to an agitating tank 17 provided with an agitator 16 and sludge water 18 settled there is forcibly fed to a filter press 22 by a high pressure pump 21 to dehydrate it and form filter cake 23, and the filter cake 23 is stored in a cake yard 24 to subject it to natural drying.</p> |
