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Sludge dewatering

Sludge is a substance that is difficult to dewater without proper preparation, and the dewatering effects of the sludge and the degree of separation are very low. Dewatering of sludge is a process that allows for their thermal treatment, reduces the costs of further processing and facilitates transport. Sludge management, in particular the issues of dewatering industrial sludge, is a specialty of Watersystem. The company's extensive offer includes devices for thickening and dewatering sludge.

Dewatering of sewage sludge

Dewatering of sewage sludge is a very important element of the sludge treatment process, which facilitates further processing. This is due to the reduction of the mass of the sludge volume. Dewatering separates the sludge into a dry cake and a free, clean filtrate. Due to costs, the sludge dewatering process should be preceded by thickening. This is because the drainage costs decrease significantly with increasing dry weight. in the settlement. The water contained in the sediments is divided into free and bound water. Thanks to the knowledge of the content of individual water fractions in sediments, it is possible to estimate the limit to which a given type of sediment can be dewatered. Research on the sludge dewatering process has shown that a significant number of factors such as initial hydration, solids content, selection of appropriate chemicals and sludge quality have a very significant impact on the course of this process and its final effect.

 

Chemicals for the deodorization process are the most commonly used compounds of iron, aluminum and calcium. Currently, polymerized organic compounds known as polyelectrolytes are preferred. Polyelectrolytes have a high molecular weight due to their chemical structure. A very important factor that determines the final effect of sludge dewatering is the appropriate dose selection. Its selection should be based on experimental experiments. Such experiments should be performed separately in each sewage treatment plant. In the event of an incorrect selection of the polyelectrolyte dose, it is possible to cause an increased cost related to the consumption of the substance. At the same time, it can also significantly worsen the drainage effect.

 

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