Activated sludge sewage treatment plant Actidyn™

compactcompactfor industrial effluents

Sludge is the name given to the wet solids separated out in the primary stage of wastewater treatment. It requires further processing to reduce the volume, and sludge thickening separates the solid and liquid components. Allowing the particles to settle at the base of a vessel is an effective way of carrying out sludge thickening, and Actidyn™ is a compact lamella sludge thickener that can be used at municipal and industrial water and wastewater treatment facilities, in drinking water applications and other chemical sludge that requires thickening before being dewatered. Sludge treatment, disposal and digestion must be handled carefully to avert the risk of contamination of surface waters and groundwater from chemicals and nutrients contained in the sludge. Sludge also contains pathogenic organisms and can be a source of odors. A high water content makes it uneconomical to transport wet sludge to a landfill site so sludge thickening and sludge dewatering, which take place before disposal or further processing, reduce the volume and therefore associated costs while helping to meet regulatory standards for the disposal and/or facilitating reuse. Actidyn reduces sludge volume as it flows through successive stages: • Coagulation — raw water is thoroughly mixed with a coagulant, a chemical used to remove suspended solids from the water in the first stage of sludge treatment. • Flocculation — a polymer is added to form and develop dense masses of bacteria - also known as flocs - using a dynamic mixer to produce optimum velocity in the sludge settling unit.