ZETAG 4139 DK is a high-molecular-weight anionic polyacrylamide designed for challenging solid–liquid separation tasks, particularly where wastewater or slurry contains a large proportion of fine, negatively charged particles. As part of the ZETAG series, it is engineered for excellent floc formation, fast settling, and high mechanical strength during dewatering. These properties make it a preferred polymer in wastewater treatment, sludge conditioning, mining tailings management, pulp and paper processes, and potable water clarification.

1. Municipal Wastewater Treatment

1.1 Sludge Dewatering

A key application of ZETAG 4139 DK is sludge dewatering in municipal wastewater treatment plants. Waste-activated sludge tends to be hydrophilic, making water difficult to remove. The polymer improves dewatering by:

• Increasing floc size and density

• Enhancing cake dryness on belt filter presses, decanter centrifuges, and chamber filter presses

• Reducing polymer consumption while delivering stronger, more stable flocs

• Boosting equipment throughput and shortening dewatering cycles

Because ZETAG 4139 DK produces shear-resistant flocs, it performs exceptionally well in high-shear equipment such as centrifuges.

1.2 Clarification and Settling

In primary and secondary clarifiers, ZETAG 4139 DK helps settle suspended solids and biological flocs. This results in:

• Enhanced overflow water clarity

• Improved solid capture efficiency

• Reduced sludge blanket height

• Better overall plant stability during hydraulic load fluctuations

Treatment plants use this grade to manage seasonal variation, shock loads, or periods of high turbidity.

2. Industrial Wastewater Treatment

ZETAG 4139 DK is widely adopted in multiple industrial sectors because industrial waste streams often contain complex mixtures of solids and colloids. Its main roles include flocculation, clarification, thickening, and sludge conditioning.

2.1 Key Industries Using ZETAG 4139 DK

• Petrochemical and refinery wastewater

• Textile dyeing and printing effluent

• Steel and metal finishing wastewater

• Chemical and pharmaceutical industries

• Food and beverage processing

• Electronics and semiconductor wastewater

• Leather tanning wastewater

• Power plant ash water handling

2.2 Clarification of Industrial Effluents

ZETAG 4139 DK is applied after coagulants like alum, PAC, or ferric chloride to bridge destabilized particles into large, rapid-settling flocs. It improves:

• Suspended solids removal

• COD and turbidity reduction

• Effluent quality for discharge or reuse

2.3 Sludge Thickening and Dewatering

Industries generate sludge with high water content and difficult-to-filter solids. ZETAG 4139 DK enhances dewatering performance, reduces sludge volume, and lowers disposal cost.

3. Mining and Mineral Processing

Mining operations generate huge volumes of tailings and mineral suspensions that require efficient thickening and water recovery. ZETAG 4139 DK is widely recognized in mineral-processing plants due to its strong bridging capability and high molecular weight.

3.1 Tailings Thickening

It improves settling in thickeners processing:

• Coal fines

• Iron ore tailings

• Copper, nickel, and cobalt tailings

• Gold and silver mining slurries

• Bauxite and alumina refinery residues

• Phosphate, potash, and other non-ferrous minerals

By accelerating sedimentation, it helps operators:

• Increase underflow density

• Reduce overflow turbidity

• Improve water recycling efficiency

• Boost throughput in constrained thickening circuits

3.2 Filtration and Dewatering

ZETAG 4139 DK forms durable flocs that resist shear, making filtration easier and faster. It benefits vacuum filters, belt filters, and pressure filters by enhancing cake formation and reducing moisture.

4. Paper and Pulp Industry

In the pulp and paper sector, ZETAG 4139 DK is applied as:

4.1 Retention Aid

The polymer improves retention of:

• Fine fibers

• Fillers such as clay, talc, and calcium carbonate

• Pigments and sizing agents

This leads to improved paper uniformity and production stability.

4.2 Drainage Improver

By accelerating water removal during sheet formation, it increases machine speed and reduces energy consumption.

4.3 Effluent Treatment Polymer

Paper mill wastewater contains lignin, fibers, solids, and organic residues. ZETAG 4139 DK accelerates clarification and sludge settlement, ensuring clean discharge water.

5. Potable Water and Surface Water Treatment

ZETAG 4139 DK is suitable for raw water clarification, especially where water sources contain high levels of suspended solids due to rainfall, flooding, or seasonal algae blooms.

Its benefits include:

• Faster formation of settleable flocs

• Lower turbidity in clarifiers and sedimentation basins

• Improved filtration performance downstream

• Reduced coagulant requirements

Water treatment plants choose this grade for its ability to treat fine clays, organic matter, and silt in river or reservoir water.

6. Environmental Engineering and Construction Applications

ZETAG 4139 DK also plays an important role in controlling turbidity in environmental and civil engineering operations.

6.1 Sediment Control

Used for sediment ponds, excavation water, tunneling, and soil-washing systems, it stabilizes suspended solids and accelerates settling.

6.2 Stormwater Management

It clarifies stormwater runoff at construction sites, quarries, and infrastructure development projects.

6.3 River, Lake, and Reservoir Clarification

The polymer is used in environmental remediation to reduce suspended solids and restore water clarity.

7. Agriculture and Aquaculture

In irrigation systems, the polymer improves water clarity and reduces sediment load. In aquaculture ponds, it helps settle fine solids, improving water quality for fish and shrimp.