| 摘要 |
<p>PURPOSE:To improve the efficiency of formed gas as a heat or power source, while contriving miniaturization of a methanation device, in methanating organic waste water by bioreaction, by performing the treatment in a short time regardless of the BOD concentration of said waste water. CONSTITUTION:Metabolic substance containing an oxidizing enzyme in the step 2 of sludge cultivation is sent into the step 1 of bioreaction, and organic waste water such as night soil is agitatively supplied at the same time to convert organic components in the waste water into organic acids and alcohols. A part of the liquid mixture is returned to the step 2 of sludge cultivation, while the remainder is divided into two parts, one of which is sent through the step 3 of concentration to the step 4 of methane reaction and the other of which is sent to the step 5 of methane bacteria cultivation. The volume of metabolic substance is increased by methane bacteria in the step 5 of methane bacteria cultivation and then sent to the step 4 of methane reaction. In the step 4 of methane reaction, CH4 and CO2 are formed by the chemical reaction of the metabolic product formed by methane bacteria with the organic acids and alcohols.</p> |
