PROBLEM TO BE SOLVED: To rcycle most of the waste water in an ash melting furnace waste gas scrubber to suppress the consumption of a large amt. of water. ;SOLUTION: The dust in an ash melting furnace waste gas is received by a dust collector provided in the preceding stage of a device 10a for treating th waste water from a waste gas scrubber for an ash melting furnace, and then the acidic gas in the waste gas is removed by this waste water treating device. The treating device is composed of a solid-liq. separation tank 12 provided on the waste water side of the waste water line 15 of a scrubber 50 and a reverse-osmosis tank 11 as a soluble solid removing tank.;COPYRIGHT: (C)2000,JPO
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