METHOD AND APPARATUS FOR ANAEROBIC DIGESTION TREATMENT OF ORGANIC WASTE LIQUID

WIPO Patent Application WO/2007/083456

A1

An apparatus for the anaerobic digestion treatment of an organic waste liquid which, even under a high organic-matter loading, can reduce the amount of organic substances without the need of increasing a heating energy or the amount of a flocculant to be used and which enables methane gas to be recovered in an increased amount. An organic sludge (organic waste liquid) is introduced into a high-temperature digestion tank (1) and subjected to anaerobic digestion at 45-95°C. The digested sludge in this high-temperature digestion tank (1) is introduced into a medium-temperature digestion tank (2) and subjected to anaerobic digestion at 25-40°C. Part of the digested sludge in this medium-temperature digestion tank (2) is drawn out and concentrated with a solid-liquid separator (3). The liquid separated in the solid-liquid separator (3) is discharged from the system. Part of the sludge concentrated is returned to the medium-temperature digestion tank (2) through a return piping (4). Part of the digested sludge sent from the medium-temperature digestion tank (2) is drawn out through a piping (5) and modified with a modification device (6). The sludge modified is returned to the high-temperature anaerobic digestion tank (1) through a return piping (7).

KOMATSU KAZUYA (JP)
YASUI HIDENARI (JP)

PCT/JP2006/324474

July 26, 2007

December 07, 2006

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KURITA WATER IND LTD (JP)
KOMATSU KAZUYA (JP)
YASUI HIDENARI (JP)

C02F3/28; C02F11/04; C02F11/06; C02F11/121; C02F11/147

JPS5748396A	1982-03-19
JP2002361291A	2002-12-17
JP2003024912A	2003-01-28
JP2001205289A	2001-07-31

SHIGENO, Tsuyoshi (9F 5-10, Shinjuku 2-chome, Shinjuku-k, Tokyo 22, JP)

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