| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a treatment method of wastewater capable of sufficiently solubilizing sludge when the sludge to be retreated in an aeration tank is solubilized by a weak acidic hypochlorous acid aqueous solution and exerting no effect on the aeration tank. <P>SOLUTION: The weak acidic hypochlorous acid aqueous solution with an effective chlorine concentration of 500-15,000 mg/l and a pH value of 4-7 is added to sludge with a sludge concentration of 2,000-30,000 mg/l in an amount of 100-3,000 mg/l to subject the sludge to solubilization treatment. The solubilized sludge is returned to a flow rate adjusting tank to be diluted by wastewater to be stagnated in the flow rate adjusting tank before sent to the aeration tank. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
