ANAEROBIC DIGESTION OF SLUDGE

PURPOSE:To carry out anaerobic digestion of excessive sludge at high speed and efficiency, by treating with the high electric voltage pulse as a pretreatment of sludge and then treating for anaerobic digestion. CONSTITUTION:In anaerobic digestion of sludge such as excessive sludge formed in sewage t...

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Bibliographic Details
Main Authors OSHIMA YOSHIO, NAKAGAWA TERUO, NONOYAMA NOBORU
Format Patent
LanguageEnglish
Published 23.08.1989
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PURPOSE:To carry out anaerobic digestion of excessive sludge at high speed and efficiency, by treating with the high electric voltage pulse as a pretreatment of sludge and then treating for anaerobic digestion. CONSTITUTION:In anaerobic digestion of sludge such as excessive sludge formed in sewage treatment by activated sludge process, the high electric voltage pulse is applied on the sludge previous to anaerobic digestion. Then the most of the electric energy is applied to the cell walls of microbe in sludge and converted into mechanical membrane-compressing energy and breaks the cell walls. Thus, soluble protein, sugar, etc., of mainly cytoplasm are eluted from the cell and processed for anaerobic digestion. Therefore, anaerobic digestion of excessive sludge is carried out at high speed and efficiency.
Bibliography:Application Number: JP19880025667