Sludge Thickener (Water & Wastewater Treatment Systems, WWTS_CAMIX Vietnam)
DESCRIPTION
The main purpose of sludge thickening/dewatering is to minimise the volume of the sludge, thereby reducing the required size and capacity of subsequent treatment processes and equipment. Furthermore, a decrease in water content reduces energy consumption for heating the sludge in the digester. The efficiency of the dewatering depends on the type of equipment and sludge quality.
CAMIX can supply PLC-controlled, fully automatic systems to handle preparation and the reliable dosing of organic coagulants or poly-electrolytes. CAMIX has the specialist knowledge to do this and can tailor a dosing station utilising chemicals as concentrates, ready-to-use solutions or dry chemicals, according to your requirements.
Sludge can be dewatered directly from a concentration tank or sludge storage tank. Usually, sludge is thickened by gravitation in a sludge concentration tank or by mechanical dewatering in simple dewatering units, and quite simply involves removal of water from the sludge. Poly-electrolytes can be added to enhance formation of large sludge-flocs.
Removing the water is handled with the CAMIX ranges of SE/SL and S pumps, which are specifically designed for durable use and flow management, and can be installed dry or submerged.
The tanks can be equipped with a low-speed AMG mixer in order to secure a homogeneous sludge concentration. CAMIX mixers offer a robust design with corrosion resistant materials, easy service and maintenance, and trouble-free operation in difficult environments.
Thickening is the first step for reducing the sludge volume by removal of free sludge water. Thin sludge is concentrated to thick sludge. Thick sludge has a higher viscosity, but must still be pumpable.
Sludge settles in gravity thickeners and is compressed by the weight of its own solids. Due to their higher specific density, primary and digested sludge can be better gravity-thickened than secondary sludge. We supply stainless steel equipment for supernatant removal and liquid sludge filling of tanker vehicles.
Secondary sludge (e.g. waste activated sludge) is preferably thickened mechanically, separate from primary sludge. Polymers are added to the thin sludge for flocculation. Generation of large and strong flocs depends on the right choice and dosage of polymers, and on intensive mixing of polymers and sludge. Sludge water is released between the flocs and drains by gravity through a filter medium (cloth or fine screen) while flocs are retained thereon.
REFERENCE PHOTOS
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