| 摘要 |
<p>PURPOSE:To make it possible to store in a stable condition in quality by partially liquidizing and fermenting an org. waste material slurry prior to the main fermentation process. CONSTITUTION:An org. waste material slurry is preliminarily subjected to the liquidizing treatment in an anaerobic condition until pH reaches to 2-4.5 while stirred in the presence of liquidizing bacteria capable of decomposing starch, protein, or fat and forming a volatile fatty acid and, thereafter, subjected to the gas treatment by using liquidizing bacteria and gasifying bacteria having methane fermenting property. Moreover, by carrying out a partially liquidizing process of the former stage in a temp. range lower than that of a main fermenting process of the latter stage, the heat loss during a storage period can be reduced. Moreover, an amount of partially liquidized org. waste material slurry of the former stage is changed in a 20-100% range of a volume of a partially liquidizing tank to cope with a wide variation in quantitative load.</p> |
