Our customers try to reduce ...

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Our customers try to reduce by optimal use of polymers to reduce water content of the sludge. Regular testing of dewatering caracteristics is than necessary. The option to use sludge as feedstock for worms is also interesting, but I do not know the economics of this solution.

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Roemer Goossensen The economics are very favourable, with very little power required, it is an aerobic process (with the worms natural burrowing activity providing the aeration for the system). An example (quality wise) a humus sludge from a percolating filter (~1.5% dry solids) as the input would produce an effluent 200 - 300mg/l BOD.  Overall solids to be disposed of would reduce by ~80%, but it would be a solids material ~70 - 80% dry solids - very easy to handle and transport.  N,P & K levels would be determined by the levels within the feed stock.

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