A compressing machine includes a press unit 12 for compressing a concentrated sludge within a squeezing chamber to provide a briquette B, and a press control means 13 for controlling the press unit 12. The press control means 13 includes a parameter and compressing speed setting means 26, a parameter measuring means 28, and a compressing speed control means 27. The parameter and compressing speed setting means 26 is a means in which a relation between a predetermined parameter that may affect compression performed by the press unit 12, and a compressing speed of the press unit 12. The predetermined parameter may include a coolant temperature, ambient temperature or a coolant content and others. The parameter measuring means 28 is a means for measuring the predetermined parameter. The compressing speed control means 27 controls, based on a result of measurement by the parameter measuring means 26, the compressing speed of the press unit 12 in accordance with a content set in the parameter and compressing speed setting means 26. IMAGE
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