Szukana fraza: [Abstract = Five samples were treated with ultrasound of different power per sample volume\: 3,12\; 6,25\; 12,5\; 25,0 and 50,0 Wh\/l. The experiments show that ultrasonic pre\-treatment with 50 Wh\/dm3 power increases the digestion of organic matter in aerobic stabilization of sewage sludge.]

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