Application of Anionic Polyacrylamide PRAESTOL DW30 DK

Anionic polyacrylamide PRAESTOL DW30 DK is a high–molecular-weight, water-soluble polymer primarily used as a flocculant, sedimentation accelerator, thickening agent, and sludge dewatering aid. It is specifically engineered for applications requiring strong particle aggregation, fast settling, and efficient solid–liquid separation. Due to its optimized anionic charge density and long molecular chain structure, PRAESTOL DW30 DK provides excellent performance in inorganic, mineral-rich, and high-turbidity water systems. It is widely applied in municipal and industrial wastewater treatment, sludge dewatering, mining and mineral processing, sand washing, papermaking, and various industrial effluent treatment processes.

1. Municipal and Industrial Wastewater Treatment

One of the core applications of PRAESTOL DW30 DK is in municipal and industrial wastewater treatment plants. Wastewater often contains fine suspended solids such as clay, silt, metal hydroxides, fibers, and colloidal organic matter that settle very slowly without chemical assistance. PRAESTOL DW30 DK works through polymer bridging and electrostatic attraction, binding fine particles into large, dense flocs that settle rapidly.

In primary clarification, the product effectively reduces turbidity and total suspended solids (TSS). In secondary biological treatment, it improves sludge settleability and reduces the risk of sludge bulking. In tertiary treatment, PRAESTOL DW30 DK is widely used as a polishing flocculant to further improve effluent clarity before discharge or reuse.

It is commonly applied to wastewater from chemical factories, textile and dyeing plants, electroplating workshops, pharmaceutical producers, food processing plants, steel mills, and electronics manufacturing facilities, helping industries meet increasingly strict environmental discharge regulations.

2. Sludge Dewatering and Conditioning

PRAESTOL DW30 DK is extensively used as a sludge conditioning and dewatering agent in mechanical dewatering equipment such as belt filter presses, centrifuges, screw presses, and plate-and-frame filter presses. When added to sludge prior to dewatering, it converts fine, compressible sludge particles into strong, fast-draining flocs.

Major performance benefits include:

• Higher sludge cake dry solids content

• Faster filtration and dewatering speed

• Reduced sludge volume

• Lower energy consumption in dewatering equipment

• Significant savings in sludge transportation and disposal costs

It performs especially well in dewatering inorganic and mineral-rich sludges, such as those produced from mining wastewater, sand washing plants, coal preparation plants, and metallurgical wastewater treatment systems. It is also highly effective in municipal sewage sludge dewatering, where moisture reduction is critical for landfill disposal, composting, thermal drying, or incineration.

3. Mining and Mineral Processing Industry

In the mining and mineral processing industry, PRAESTOL DW30 DK functions as a thickening, clarification, and tailings treatment flocculant. During ore beneficiation, grinding and flotation processes produce large quantities of fine mineral particles that remain suspended in process water. PRAESTOL DW30 DK rapidly aggregates these particles, enabling fast sedimentation in:

• High-rate thickeners

• Deep-cone thickeners

• Clarifiers

• Tailings ponds

It is widely used in the processing of iron ore, copper ore, gold ore, coal, phosphate, bauxite, and other non-ferrous metals. Its application significantly improves overflow water clarity, enabling efficient water recycling and reducing freshwater consumption. In tailings management, PRAESTOL DW30 DK promotes rapid tailings consolidation, improved dam stability, and higher water recovery, contributing to safer and more environmentally responsible mining operations.

4. Sand Washing and Aggregate Processing

PRAESTOL DW30 DK is widely applied in sand washing plants, quarry operations, and construction aggregate processing facilities. Wash water generated during sand and gravel processing contains large quantities of fine clay, mud, and suspended particulate matter that settle very slowly under natural gravity.

By applying PRAESTOL DW30 DK, these fine particles rapidly flocculate and settle in clarification tanks or thickeners, making it possible to:

• Efficiently recycle process water

• Reduce the size and maintenance of settling ponds

• Produce cleaner, higher-quality sand and aggregates

• Lower the environmental discharge load

This application is especially vital in regions with water scarcity and strict environmental protection regulations.

5. Papermaking and Pulp Processing

In the pulp and paper industry, PRAESTOL DW30 DK is used mainly as a retention aid, drainage aid, and white-water clarification agent. It improves the retention of:

• Cellulose fibers

• Mineral fillers such as calcium carbonate and kaolin

• Fine paper additives and pigments

By increasing retention efficiency, the polymer enhances paper sheet formation, mechanical strength, surface quality, and production yield. In white-water recovery systems, PRAESTOL DW30 DK separates fibers and fines from water, allowing clean water reuse and reducing wastewater generation.

6. Textile and Dyeing Wastewater Treatment

Textile and dyeing wastewater contains high color, surfactants, starch, fibers, and complex organic compounds that place heavy loads on treatment systems. After coagulation, PRAESTOL DW30 DK is added to flocculate these pollutants and promote rapid sedimentation.

This results in:

• Improved color removal

• Reduced turbidity and suspended solids

• Lower COD and BOD loading on biological treatment processes

• Improved stability of downstream treatment units

Its use enables textile plants to achieve consistent discharge compliance while minimizing chemical consumption and operating costs.

7. Food and Beverage Industry Wastewater

In the food and beverage industry, wastewater typically contains proteins, fats, sugars, starches, and fine organic solids. PRAESTOL DW30 DK efficiently flocculates these contaminants and improves clarification, flotation, and sedimentation performance. It is widely applied in:

• Dairy processing plants

• Breweries and beverage factories

• Meat, poultry, and seafood processing facilities

• Sugar and starch manufacturing

Its application reduces the organic load on biological treatment systems and improves sludge dewatering efficiency.

8. Key Performance Advantages

PRAESTOL DW30 DK offers multiple technical and economic advantages:

• High molecular weight for strong and stable floc formation

• Excellent performance in inorganic and mineral suspension systems

• Low dosage requirement with high cost efficiency

• Rapid dissolution and easy preparation

• Wide operating pH range

• Good environmental compatibility and low toxicity