FIELD: agriculture engineering. SUBSTANCE: apparatus has perforated cylindric case 3 wherein main piston 5 having delivery valve 11 is received for reciprocation. Additional position 4 has suction valve 10 and is mounted for counter reciprocation with respect to main piston 5. When pistons 4 and 5 move toward each other manure is compressed and separated into fractions. A pressure regulator opens delivery valve 11 and solid fraction is displaced to outlet pipe 8. Compression ratio of spring 12 determines compression pressure of manure. EFFECT: enhanced efficiency. 1 dwg
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