| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple and low-cost method for disinfecting waste water which is capable of performing sufficient disinfection and an apparatus for the same. SOLUTION: The method for disinfecting the waste water comprises mixing an aqueous sodium hypochlorite solution, an aqueous acid solution, and an aqueous sodium chlorite solution, then injecting a solution mixture to the waste water. The aqueous solution to be mixed is selected from these three aqueous solutions and is changed according to the concentration of the pollutants in the waste water. The apparatus for disinfecting the waste water is equipped with an aqueous sodium hypochlorite solution supplying means, an aqueous acid solution supplying means, and an aqueous sodium chlorite solution supplying means, a mixing means for mixing the aqueous solutions supplied from the three supplying means, and a solution mixture injecting means for injecting the solution mixture mixed by the mixing means into the waste water. The apparatus for disinfecting the waste water is further provided with a pollutant concentration measuring means for directly or indirectly determining the concentration of the pollutants in the waste water and an aqueous solution selecting means for selecting and changing the aqueous solution supplied to the mixing means according to the pollutant concentration obtained by the pollutant concentration measuring means. COPYRIGHT: (C)2004,JPO
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