| 摘要 |
<p>PURPOSE:To treat effectively an org. waste water with a high concn. at a high vol loading by a method wherein a water to be treated and/or a treated water are aerated and after dissolved hydrogen sulfide is removed, they are introduced into a treating tank. CONSTITUTION:A water to be treated is fed into an adjusting tank 1 from an introducing flow path 20 and during staying there, anaerobic fermentation is performed. An alkali soln. is fed therein from an alkali soln. tank 5 and a metabolic gas is blown therein from an aeration means 6 to remove dissolved hydrogen sulfide. This water to be treated is fed to the lower part of a UASB treating tank 2 by a means 7 for feeding the water to be treated. While it flows upward in a biological sludge bed 30, the ingredients are decomposed with an anaerobic fungus constituting a granular sludge 9. A treated water treated in the biological sludge bed 30 flows into a three phase separating means 10 and is separated into a sludge, a treated water and a metabolic gas. A part of the treated water is fed into a treated water tank 3 and after the dissolved hydrogen sulfide is removed by using the metabolic gas blown from a means 8 for exposing a base sheet, it is fed into a treating tank 2 with the water to be treated.</p> |
