Szukana fraza: [Abstract = "The aim of the study was to record changes in the structure of excess sludge tested, as well as the determination of disintegration degree \[%\] versus the strength of ultrasound wave \[W\/cm2\]. An ultrasonic disintegrator VCX \? 1500 \(Sonics Company\) was used in the investigation. The test substrate was excess sludge from the Central Wastewater Treatment Plant P.S.W. \"WARTA\" in Czestochowa."]