Investigation of the possibility of improving the drainability of co-sludge of oil-emulsion and acid-alkaline wastewater during freezing

The article presents the results on the possibility of improving the water recovery of joint sludge of oil-emulsion and acid-alkali wastewater during their freezing. The data of thermogravimetric method, determining elemental composition and structure of sludge, as well as the results of study of their properties, are given. It has been established that the specific filtration resistance is reduced by up to 8 times and oiling by 8% when the sludge is cryogenically treated in natural conditions.