Title:
METHOD FOR OPERATING ANAEROBIC TREATMENT APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/176161
Kind Code:
A1
Abstract:
The present invention provides a method for operating an anaerobic treatment apparatus which introduces a starting waste liquid that is composed of an organic waste liquid into an anaerobic treatment tank, in which a carrier and granule are not present, and performs an organic matter treatment and a methane fermentation treatment. With respect to this method for operating an anaerobic treatment apparatus, if the ratio SS/CODcr of the concentration (mg/L) of suspended solids in the starting waste liquid to the CODcr concentration (mg/L) is 0.4 or less, aerobic sludge from an aerobic biological treatment step is continuously added to the starting waste liquid; and the aerobic sludge is added to the starting waste liquid in such an amount that the ratio SS/CODcr of the concentration of SS derived from the aerobic sludge in the aerobic sludge-added waste liquid, to which the aerobic sludge has been added, to the CODcr concentration in the starting waste liquid is 0.05 or more.
Inventors:
FUJISHIMA SHIGEKI (JP)
Application Number:
PCT/JP2023/002244
Publication Date:
September 21, 2023
Filing Date:
January 25, 2023
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/44; C02F3/28
Foreign References:
| JP2013208556A | 2013-10-10 | |||
| JP2005211727A | 2005-08-11 | |||
| JP2020157221A | 2020-10-01 | |||
| JP2004209479A | 2004-07-29 | |||
| JP2006068632A | 2006-03-16 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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