| abstract |
(57) [Abstract] [PROBLEMS] To provide an effective dehydration method for organic sludge that is difficult to dehydrate. SOLUTION: An organic sludge washed with an alkaline aqueous solution is neutralized with an acid, a polymer flocculant is added to perform coagulation treatment, and then dehydration is performed. [Effect] Organic sludge, which is difficult to be dehydrated by the conventional technique, can be easily dehydrated, and the water content of the obtained dehydrated cake, the releasability from the filter cloth, and the SS recovery rate can be improved. |