| 摘要 |
<p>A method of producing fertilizer out of sludge, in which method sludge is heated with superheated steam for achieving hygienization to destroy pathog enic microorganisms. In the method, the sludge is heated to a temperature of 60 to 100 0C with superheated steam having a temperature of 200 to 600 0C t o activate increasing of the amount of soluble carbon in the sludge and to r estart biodegradation of the sludge by using non-pathogenic microorganisms s till remaining in the sludge after the heating.</p> |
