| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an anaerobic treatment method for an org. waste liquid capable of reducing the volume of the sludge produced in an anaerobic treatment, preventing the degradation in the quality of treated water, such as increase of chromaticity and COD, and obtaining high treated water quality inexpensively and an apparatus therefor. SOLUTION: The in-vessel liquid 11 is withdrawn from an anaerobic treating vessel 1 and is subjected to sepn. of solid from the liquid in a member separator 2, by which the treated liquid is obtd. Part 5 of the thickened sludge is returned to the anaerobic treating vessel 1 and other part 17 is introduced to a reforming vessel 3, such as ozone treating vessel or high-voltage pulse discharge treating vessel by which the sludge is reformed to easily decomposable sludge. This sludge is returned to the anaerobic treating vessel 1 and is subjected to the anaerobic treatment, by which the volume of the generated sludge is reduced.</p> |
