@misc{Sorys_Piotr_Ultrasonic,
 author={Sorys, Piotr and Zielewicz, Ewa},
 howpublished={online},
 publisher={Zielona Góra: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego},
 language={eng},
 abstract={The aerobic stabilization of excess sewage sludge using low frequency ultrasound (25kHz) was investigated. The mechanically thickened excess sludge was obtained from full-scale wastewater treatment plants. The samples of sewage sludge were prepared by dissolving drinking water to obtain initial total solid concentration of 1800 mg/dm3.},
 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.},
 type={artykuł},
 title={Ultrasonic intensification of aerobic stabilization of sewage sludge = Ultradźwiękowa intensyfikacja stabilizacji tlenowej osadów ściekowych},
 keywords={osady ściekowe, biologiczna oczyszczalnia ścieków, sewage sludge, wasterwater treatment plants},
}