Colsen International b.v.

UNAS : The key to energy-positive sewage treatment


Water boards are looking for more cost effective ways to operate their WWTP’s and produce clean effluent in an energy neutral manner. As part of that strategy the maximum recovery of energy and nutrients becomes a major objective. A technology upgrade of existing installations reveals possible, whereby cold anammox plays a key role. The recently developed Upflow New Activated Sludge (UNAS) technology facilitates the future revamp of many WWTP's towards energy neutral water treatment.

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