Dewatering and
Water Clarification Expertise
Wastewater treatment facilities experience tremendous improvement in throughput and operational stability when solids are accurately measured. Operators are able to regulate solids pumping of primary sludge (PS), return activated sludge (RAS) and waste activated sludge (WAS) to avoid low solids transfer.
This contributes stability to plant operations and induces significant throughput improvement.
Water treatment plants improve performance of their clarification operations by measuring and regulating the removal of sludge residuals from their filtration beds. The desired Cake Density can be achieved by manipulating a number of process variables surrounding the equipment that is used for dewatering.

For municipal sludge the target Dry Cake Total Solids is typically in the range of 25-35%.
The target depends on the type of sludge and its components. Higher solids are better to minimize disposal costs – transport, dumping, incineration. As well, the centrate produced needs to be as low in Total Suspended Solids (TSS) as possible so that the dead-load of solids recirculating in the wastewater treatment process is minimized.
At the same time, there is a need to regulate Polymer addition to minimize those costs while not overdosing and causing foaming problems. Polymer must be added to provide the flocculation of solids in the sludge feed so that dewatering can occur and the capture rate is high.