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A further reduction of the sludge weight is possible with the help of sludge drying, by evaporating the remaining bound water in the sludge. However a significant reduction of the sludge volume cannot be reached with this method. Sludge drying procedures are based particularly on contact-, convection or radiation procedures.

It has been shown that Neutralac® reagents improve sludge drying, thus leading to lower energy costs.

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