| 摘要 |
Stabilized and partially dehydrated sewage sludges, with a dry substance content preferably of 20% approximately, are mixed with a porous, mineral, essentially granular support material, preferably oil shale slags which are sieved to a size from 0 to 8mm. A soil improving agent is obtained which may be stored and spread, of which the production enables, in comparison to liquid sludges of agricultural use, to evacuate throughout the year sewage sludges without wasting the fertilizers and the humus contained therein. With respect to the conventional deposition on dumping grounds or to the combustion of sewage sludges, there is obtained in the soil improving agent a product which is technically and economically useful. |
