| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sludge usage evaluation system for selecting sludge suitable for use from an economical viewpoint when concentrated sludge or dehydrated sludge generated in a sewage treatment plant is used as fuel in a boiler system. Ž<P>SOLUTION: A combustible mixing quantity of concentrated sludge and that of dehydrated sludge combustible with coal in a boiler are found based on an upper limit value of a sludge mixing rate allowing operation of the boiler among sludge mixing rates serving as a rate of the concentrated sludge or the dehydrated sludge in mixed fuel. Based on a treatment cost, which is collected by the boiler system side from the sewage treatment plant side as a cost for treating the concentrated sludge or the dehydrated sludge, a transportation cost that the boiler system side needs for transporting the concentrated sludge or the dehydrated sludge from the sewage treatment plant, and the combustible mixing quantity, a profit amount obtained when the concentrated sludge or the dehydrated sludge is used is calculated for each of the concentrated sludge and the dehydrated sludge, and sludge giving a higher profit amount is displayed as sludge suitable for use. Ž<P>COPYRIGHT: (C)2008,JPO&INPIT Ž</p> |
