METHOD AND APPARATUS FOR TREATING ORGANIC WASTE WATER

PROBLEM TO BE SOLVED: To treat organic waste water containing organic matter, nitrogen and phosphorus in consideration of energy saving, the recovery of a useful substance and the utilization of the useful substance as resources. SOLUTION: Initial sedimented sludge separated in a first solid-liquid...

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Bibliographic Details
Main Authors HAGINO TAKAO, WATANABE AKIRA
Format Patent
LanguageEnglish
Published 24.04.2001
Edition7
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PROBLEM TO BE SOLVED: To treat organic waste water containing organic matter, nitrogen and phosphorus in consideration of energy saving, the recovery of a useful substance and the utilization of the useful substance as resources. SOLUTION: Initial sedimented sludge separated in a first solid-liquid separation tank 1 or conc. sludge 11 thereof is dehydrated by a dehydrator 4 and the obtained dehydrated cake is burnt in a cake combustion process 7 and excessive sludge separated in a final solid-liquid separation tank 3 or concentrated sludge 31 thereof is digested in an anaerobic fermentation process 5 and phosphorus and nitrogen are recovered from the digested sludge formed in the anaerobic fermentation process 5 in a form of magnesium ammonium phosphate.
Bibliography:Application Number: JP19990293907