Technological and Ecological Aspects of Disposal of Spent Cutting Fluids
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Dnipro National University of Railway Transport named after Academician V. Lazaryan, 49033, Dnirpo, Ukraine
Railway Research Institute, ul. Chłopickiego 50, 04-275 Warsaw, Poland
Valeriy Kuznetsov   

Railway Research Institute
Publication date: 2021-04-01
J. Ecol. Eng. 2021; 22(4):207–212
Processing of metals by cutting under modern conditions becomes impossible without the use of effective cutting fluids. The main purpose of cutting fluids is cooling, lubrication of the workpiece processing area. Spent emulsion is a special type of wastewater, very dangerous to the environment, as it contains a large number of persistently emulsified petroleum products. The methods using various surfactants were tested for the cutting fluid disposal. The obtained results allowed proposing a general flow diagram of treatment of spent cutting fluids, as well as a block diagram of their purification. After processing the spent cutting fluids according to the proposed diagram, two products were obtained, namely water and sludge. This technology can be used in metalworking shops of railway enterprises, as well as the enterprises of machine-building, metallurgical and other industries where CF-effluents are formed within the wastewater complex. It will provide both an economic result through the reuse of water and will give a significant environmental effect by minimizing the amount of hazardous waste.