| 摘要 |
<p>PURPOSE:To perform enough methane fermentation without using a tank or device for trace elements by adding sludge to org. waste water containing no trace element and producing methane by fermentation. CONSTITUTION:In a process of treating org. waste water containing no inorg. trace element such as Fe or Ni, drained from food industry, pulp industry, etc., sludge 3 such as first sludge of sewage or excessive sludge in an activated sludge method is added to the org. waste water 1. Since the sludge contains a certain amt. of metal and org. compd. required for methane fermentation, the sludge sufficiently promotes the fermentation treatment of methane in the succeeding process. Thereby, no dissolution tank for addition of trace elements nor device for weighing is needed and thus, cost of treatment can be reduced.</p> |
