Application of PRAESTOL LT27 Anionic Polyacrylamide

PRAESTOL LT27 anionic polyacrylamide is a high-efficiency flocculant widely used in solid–liquid separation processes across municipal, industrial, and mining applications. As a specially engineered anionic polyacrylamide, PRAESTOL LT27 anionic polyacrylamide offers an optimized balance of molecular weight and anionic charge density, enabling effective particle bridging, rapid settling, and excellent clarification performance in systems containing fine suspended solids.

Municipal and Industrial Wastewater Treatment

One of the most significant applications of PRAESTOL LT27 anionic polyacrylamide is in municipal and industrial wastewater treatment plants. In primary and secondary clarification stages, PRAESTOL LT27 anionic polyacrylamide is typically applied after inorganic coagulants such as aluminum sulfate, ferric chloride, or polyaluminum chloride. Once colloidal particles are destabilized, PRAESTOL LT27 anionic polyacrylamide promotes floc growth through polymer bridging, forming large and dense flocs that settle quickly.

In municipal wastewater treatment, PRAESTOL LT27 anionic polyacrylamide improves suspended solids removal, reduces effluent turbidity, and enhances the overall efficiency of clarifiers. In industrial wastewater treatment—such as in chemical manufacturing, metal finishing, food processing, pulp and paper, and textile industries—PRAESTOL LT27 anionic polyacrylamide effectively removes fine organic and inorganic particles that are otherwise difficult to separate. Its stable performance helps treatment facilities maintain compliance with discharge regulations under variable operating conditions.

Sludge Thickening and Mechanical Dewatering

PRAESTOL LT27 anionic polyacrylamide is widely used in sludge thickening and mechanical dewatering processes. It is suitable for gravity thickeners, belt filter presses, centrifuges, screw presses, and chamber filter presses. When dosed correctly, PRAESTOL LT27 anionic polyacrylamide conditions sludge by forming strong, shear-resistant flocs that release water efficiently during mechanical separation.

In activated sludge, primary sludge, and mixed sludge applications, PRAESTOL LT27 anionic polyacrylamide increases cake solids concentration while reducing filtrate turbidity. This leads to lower sludge volumes, reduced transportation and disposal costs, and improved operational efficiency. The robust flocs produced by PRAESTOL LT27 anionic polyacrylamide remain stable even under high shear conditions, ensuring consistent dewatering performance.

Mining and Mineral Processing Applications

In mining and mineral processing operations, PRAESTOL LT27 anionic polyacrylamide plays a crucial role in tailings thickening, slurry clarification, and process water recovery. Fine mineral particles such as clay, silica, and metal oxides often carry negative surface charges and remain suspended for extended periods. PRAESTOL LT27 anionic polyacrylamide effectively aggregates these particles through long-chain polymer bridging.

In tailings thickeners, PRAESTOL LT27 anionic polyacrylamide improves settling rates, increases underflow solids concentration, and produces clear overflow water suitable for reuse in the process circuit. This reduces freshwater demand and supports sustainable mining practices. PRAESTOL LT27 anionic polyacrylamide is also commonly used in high-density and paste thickening applications, where stable floc formation is essential for consistent underflow discharge and safe tailings management.

Alumina Refining and Red Mud Treatment

A key industrial application of PRAESTOL LT27 anionic polyacrylamide is in alumina refining, particularly in red mud settling and washing circuits of the Bayer process. During bauxite digestion, fine red mud particles must be efficiently separated from sodium aluminate liquor. PRAESTOL LT27 anionic polyacrylamide enhances red mud flocculation, resulting in faster settling rates and improved compaction.

The use of PRAESTOL LT27 anionic polyacrylamide leads to clearer overflow liquor, improved washing efficiency, and reduced caustic soda losses. In high-solids red mud thickeners, PRAESTOL LT27 anionic polyacrylamide improves underflow rheology, supporting stable pumping, stacking, or dry disposal of residue.

Sand Washing and Aggregate Processing

PRAESTOL LT27 anionic polyacrylamide is widely applied in sand washing plants and aggregate processing facilities to separate fine silt and clay from process water. By promoting rapid flocculation of fines, PRAESTOL LT27 anionic polyacrylamide enables efficient settling in clarifiers and settling tanks.

This application improves water recycling efficiency, reduces the need for large settling ponds, and minimizes environmental discharge. At the same time, the use of PRAESTOL LT27 anionic polyacrylamide enhances the quality of washed sand and aggregates by reducing residual fines content.

Conclusion

In summary, PRAESTOL LT27 anionic polyacrylamide is a versatile and high-performance flocculant used in wastewater treatment, sludge dewatering, mining, alumina refining, and aggregate processing. Its strong flocculation capability, low dosage requirement, and adaptability to diverse water chemistries make PRAESTOL LT27 anionic polyacrylamide a reliable solution for demanding solid–liquid separation applications.