| 摘要 |
<p>PURPOSE:To improve methane production efficiency and decrease the formation of scum by disposing a screen body to the fermentation liquid surface of a methane fermentation tank and confining the solids and scum within the fermentation liquid. CONSTITUTION:A filter medium 10 is mounted above a fermenting material charging opening 2 in a digesting tank 1. Any filter medium 10 may be used as far as it is a three-dimensional net body. It is removably fixed within the digesting tank 11 by means of pawl pieces 12 and receivers 11 and is so disposed as to remain on or under the fermentation liquid level. Organic substances contg. coarse solids such as garbage are charged through the charge port 2 into the tank 1. In the tank 1, the floatable org. substances are captured by the filter medium 10, and all the inflow org. substances are subjected to methane fermentation. The evolved gas is stored in a gas storing tank 7. When pressure above a certain fixed pressure is reached, the gas is used as an energy source. After the use of a fixed period, the filter media 10 is taken out and is washed. Although there are no limits in the material of the filter medium 10, those free from corrosion are desirable.</p> |
