alexa Components of released liquid from ultrasonic waste activated sludge disintegration.
Environmental Sciences

Environmental Sciences

Hydrology: Current Research

Author(s): Wang F, Lu S, Ji M

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Abstract Ultrasound can be applied as a pretreatment to disintegrate sludge. In this paper, by observing the solution concentration of polysaccharide, protein, DNA, Ca and Mg before and after disintegration, the main components in the released liquid are analyzed. It has been found that the predominant component of the released liquid in this research is protein. Ultrasound can destroy the extracellular polymeric substances (EPS), which is important to the sludge flocs structure. Ca2+ and Mg2+, which play a key role in binding the EPS are released into the aqueous phase. As a result, the sludge flocs are loosened. Under the effect of the hydraulic shear force, the sludge is disintegrated. Then the hydraulic shear forces destroy the cell walls, the substances inside the cells are released into the aqueous phase. This article was published in Ultrason Sonochem and referenced in Hydrology: Current Research

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