| 摘要 |
<p>PURPOSE:To form efficiently methane with fewer days of retention by cultivating and propagating microbes capable of forming methane and immobilized on a carrier, and then bringing the immobilized microbes into contact with waste water contg. org. materials. CONSTITUTION:A specified amt. of microbes belonging to methanococcus is mixed with an aq. soln. of a gelling base agent, gelated, and molded. Then said microbes are cultivated and propagated. Subsequently, the immobilized microbes embedded in a gelled carrier is brought into contact with waste water contg. org. materials by using a fermenter of batch fermentation or continuous fermentation to form methane. When sludge digested at moderate temps. in a sewage disposal plant is used as seed sludge, said culture and contact with waste water are carried out at 20-45 deg.C, preferably at 35-40 deg.C, and at 6.5-8.5pH, preferably at 7.0-8.0pH. When sludge digested at high temps. is used, said process is carried out at 45-60 deg.C, preferably at 50-55 deg.C, and at 6.5-8.5pH, preferably at 7.0-8.0pH.</p> |
