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The paper presents the need for the purification of polluted air from the highly polluting processing technology of an industrial shop. (paint shops, foundries, welding constructions, forging, etc.). The advantages of using ultrasounds in the pollutant air filtration and purification process and an ultrasonic filter designed are presented. The main computational and construction elements of the ultraacoustic system used in the design of the air filter are presented in the paper. Paper insists in the design of the ...

Water jet technology is friendly and belongs to green technology. Water jet technology is divided depending on whether the water is used only water or a mixture of an abrasive and water to clear water jet and abrasive water jet technology. It is possible to divide as the paper material to the steel. This progressive technology is applied in various sectors of industry. During the cutting operations creates the waste in the forms as used abrasive material, polluted water, sludge, used material and other rest materi...