INTEGRATED TREATMENT METHOD OF BIOCHEMICAL SLUDGE IN MUNICIPAL WASTEWATER TREATMENT PLANT AND MUNICIPAL WASTE GREASE

摘要

An integrated treatment method of biochemical sludge in municipal wastewater treatment plant and municipal waste grease includes dry distillation of biochemical sludge and treatment of waste grease. This method includes the following steps: mixing the waste grease from which the impurity has been removed by pressure filtration and diesel oil according to certain ratio to obtain mixed fuel which can be used as the fuel of dry distillation, dry distilling the biochemical sludge under the airproof condition of no oxygen, no combustion and high temperature. The water in the biochemical sludge is transformed to vapor, part of biochemical sludge is transformed to combustible gas and part of biochemical sludge is transformed to biological carbon. This method reduces the cost of dry distillation of biochemical sludge and can make use of waste grease simultaneously.