DEHYDRATION METHOD AND APPARATUS FOR ORGANIC SLUDGE

PROBLEM TO BE SOLVED: To provide a new dehydration method which employs an inorganic coagulant post-addition method, and by which the moisture content of a finally acquired dehydrated object is more reduced and the amount of waste materials is also reduced.SOLUTION: The dehydration method for organi...

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Main Authors ANDO TAKEHIKO, SATO JUNICHI, KOMIYAMA MASARU, HAGINO TAKAO, KOGA DAISUKE, MORITA TOMOYUKI
Format Patent
LanguageEnglish
Published 07.01.2013
Subjects
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PRESSES
PRESSES IN GENERAL
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PROBLEM TO BE SOLVED: To provide a new dehydration method which employs an inorganic coagulant post-addition method, and by which the moisture content of a finally acquired dehydrated object is more reduced and the amount of waste materials is also reduced.SOLUTION: The dehydration method for organic sludge performs the following steps in order: a coagulation step of adding a polymer coagulant to organic sludge to form the coagulated sludge; a coagulated sludge pressure filtration step of pressurizing the coagulated sludge to compress and dehydrate the coagulated sludge; an inorganic coagulant addition step of adding the inorganic coagulant to a dehydrated cake formed in the coagulated sludge pressure filtration process; and a mechanical dehydration step of mechanically dehydrating the dehydrated cake to which the inorganic coagulant has been added.
Bibliography:Application Number: JP20110137009