WASTE WATER TREATING SYSTEM AND ITS METHOD

摘要

PROBLEM TO BE SOLVED: To provide a waste water treating system and its method capable of neutralizing carbon dioxide in waste gas while suppressing the scatting of the waste to be treated even if the waste gas from a cogeneration of large gas flow rate is used. SOLUTION: In the waste water treating system in which the waste water is subjected to neutralizing treatment by allowing the waste water discharged from a boiler to make it contact with the waste gas discharged from the boiler, the system is provided with a waste water receiving tank 4 for receiving and storing the waste water, a spray nozzle 8 for returning the waste water stored in the waste water receiving tank 4 to the waste water receiving tank 4 while sprinkling the water to the discharged waste gas, a circulation pump 5 for circulating the waste water between the spray nozzle 8 and the waste water receiving tank 4, a pH meter 6 for measuring the neutralization degree of the waste water under circulation and a solenoid valve 7 for discharging the waste water under circulation when the neutralization degree of the waste water becomes within discharging range.