Disclosed is a method of making capsules of dehydrated sludge which can omit conventionally required unit operations, reduce or eliminate the cost of the equipment and power, heat energy and consumables required for operation, and assures simple operation. The method includes the steps of shaping a steel...http://www.google.es/patents/US5220717?utm_source=gb-gplus-sharePatente US5220717 - Method of making capsules of dehydrated sludge and apparatus therefor
Method of making capsules of dehydrated sludge and apparatus therefor