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The used liquid wash solutions utilization problem in railway depots of Russian Federation was overviewed. Postulated, that it is important to solve ecological and energy efficiency problem together on railways. Authors shows, that in this moment level of development and using resource saving technology in railway depots is too low. Economical, juridical and technological aspect of this problem was analyzed. Shows, that in present conditions we need to treat wash solutions in the closed water recycling process. Simultaneously waste products must be concentrated and then used, taking into consideration, that concentrated waste products contains flammable oil-products. Proposed to combust it and generate heat energy. Taking review of oil-containing waste products concentration and combustion methods. Shows, that heat energy can be used for grows up energy efficiency of railway depots. Described theoretical basics, results of carried experiments, and economic effect was estimated. It`s proved, that proposed technology is useful and can be realized. Preferred construction of washing machines and waste treatment facilities are recommended. Ways of next research work are selected and proved.