Method for dehydrating sewage sludge without injection of chemical
专利汇可以提供Method for dehydrating sewage sludge without injection of chemical专利检索，专利查询，专利分析的服务。并且PURPOSE: To dehydrate sewage sludge without injection of chemicals and to improve remarkably the filtration rate and the water content in cake by electrolyzing difficult-to-filter sludge generated in a sewage treatment plant, etc., and contg. a large amt. of org. components and then filtering and dehydrating the sludge.
CONSTITUTION: When difficult-to-filter sludge generated in a sewage treatment plant, etc., and contg. a large amt. or org. components is filtered and dehydrated, steel is used as the anodic material and an Al material is used as the cathodic material in an electrical treating vessel. A DC current is loaded in the vessel and the sludge is electrolytically treated for 60W120min. Consequently, the filtrability of sludge is improved and the sludge can be filtered and dehydrated by a pressure dehydrator or a vacuum dehydrator without using chemicals such as a flocculant and a filter aid. Besides, an extremely small amt. of sodium chloride or Ca fluoride, etc., is added and mixed to control the deterioration of the electrodes, the polarities of the electrodes are alternated at an opportune time to prevent the deterioration of the electrodes and restore the conduction of electricity and a continuous operation can be carried out.
COPYRIGHT: (C)1986,JPO&Japio，下面是Method for dehydrating sewage sludge without injection of chemical专利的具体信息内容。
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