Abstract
Investing the effectiveness using sludge incinerator ash for sludge condition and its effective adding methods for improving dehydration in fluoride electrolysis sludge treatment, following items were clarified in this paper: 1) It is found that the sludge dehydration was improved in proportion to the addition of sludge incinerator ash; 2) But, generally sludge incinerator ash itself includes many fine particles with high specific gravity, which may plug filtration. Therefore, the surface reforming was required to improve the dispersibility of particulates. As a result of this, the dehydration (becomes better) in smaller adding volume than previous one; 3) Further, considering ionically the adhesion and combination of the organic fiberizing matters produced by electrolysis with sludge incinerator ash, timely change of addition time does not only decrease the amount of sludge incinerator ash but increases sludge dehydration. From these results, it was concluded that the utilization of the sludge incinerator ash for sewage sludge treatment by electrolysis is very useful.
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