TREATMENT METHOD AND TREATMENT APPARATUS FOR ORGANIC WASTE WATER

摘要

PROBLEM TO BE SOLVED: To provide a treatment method capable of highly treating even organic waste water containing sulfate ion or sulfite ion.

SOLUTION: The treatment method includes a 1st step for carrying out an acid formation treatment of the organic waste water containing sulfate ion and/or sulfite ion and for reducing the sulfate ion and/or sulfite ion to form sulfide, a 2nd step for adding an iron salt based inorganic flocculant into the organic waste water obtained by the 1st step and containing the sulfide to flocculate the sulfide to be separated from the organic water water and a 3rd step for anaerobically treating the organic waste water which is obtained in the 2nd step and from which the sulfide is separated. The methane fermentation of organic components in the organic waste water is smoothly carried out in the anaerobic treatment because the sulfate ion and the sulfite ion are removed from the organic waste water before the anaerobic treatment.

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