Szukana fraza: [Abstract = "Exposure of sludge to the ultrasonic field as a disintegrating factor before the mesophilic anaerobic stabilisation directly affects the increase in the susceptibility of sludge on the biochemical process of decomposition in the anaerobic conditions. Thanks to the use of sewage sludge pretreatment, an increase of the disintegration degree of sludge undergoing physical modifications is reached, as well as the intensification of biogas production."]

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