Effects of ultrasonic disintegration of excess sludge obtained in disintegrators of different constructions

Environmental Technology
Ewa Zielewicz, Malwina Tytła

Abstract

The ultrasonic disintegration of excess sludge is placed after the mechanical thickening but before the digestion tanks in order to intensify the process of sludge stabilization. The effects obtained directly after ultrasonic disintegration depend on many factors and can be grouped in two main categories: factors affecting the quality of sludge and those associated with the construction of disintegrators and its parameters. The ultrasonic disintegration research was carried out using three types of structural solutions of disintegrators. Two of them, that is, WK-2000 ultrasonic generator (P = 400 W) working with a thin sonotrode and WK-2010 ultrasonic generator (P = 100-1000 W) working with a new type construction emitter lens sonotrode, were compared with the influence of a washer with a flat emitter. The investigations have shown that in the same sludge, using the same value of volumetric energy, the resulting effect depends on the construction of the ultrasonic disintegrator, that is, design of the head and the ratio between the field of the emitter and the field of the chamber in sonicated medium.

References

Jul 5, 2005·Journal of Hazardous Materials·Fen WangMin Ji
Feb 10, 2007·Ultrasonics Sonochemistry·Klaus Nickel, Uwe Neis
May 21, 2008·Bioresource Technology·Guangming ZhangHuanzhi Liu
May 18, 2010·Ultrasonics Sonochemistry·Sridhar PilliR Y Surampalli
Aug 17, 2010·Journal of Hazardous Materials·H CarrèreI Ferrer

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Citations

Jan 8, 2020··Mantas AputisRegimantas Dauknys

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