The Industrial Decanter Centrifuge for ZLD Pretreatment continuously removes suspended solids, precipitated salts, metal hydroxides, and dense sludge before evaporation, crystallization, or membrane concentration.

It helps protect downstream MEE, MVR, crystallizers, heat exchangers, and RO systems from blockage, scaling, erosion, and unstable operation.

• High-salinity wastewater pretreatment
• RO concentrate solids removal
• Chemical precipitation sludge separation
• Metal hydroxide sludge dewatering
• Brine clarification before evaporation
• Crystallizer mother-liquor treatment
• Salt-slurry thickening
• Pretreatment before MEE or MVR systems

High Suspended-Solids Load

Fine minerals, precipitated salts, metal hydroxides, and process residues may enter the evaporation system.

Effective solids removal reduces blockage and sediment accumulation.

Scaling and Crystallization

Cooling or concentration may cause calcium salts, silica, sulfates, or other compounds to precipitate.

Stable temperature and controlled feeding help limit deposits.

Variable Feed Composition

Solids concentration, particle size, pH, salinity, and temperature may change during production.

Adjustable bowl speed and differential speed support stable operation.

Corrosive High-Salinity Liquids

Chlorides, sulfates, acids, and alkalis can accelerate corrosion.

SS316L, duplex steel, titanium, or special alloys may be selected.

Dissolved Salt Content

The centrifuge removes suspended and precipitated solids but does not remove dissolved salts.

Evaporation, crystallization, or membrane treatment is still required for ZLD.

Peony provides continuous solid-liquid separation solutions for brine clarification, sludge dewatering, and downstream equipment protection.

High-Salinity Wastewater
→ Screening / Equalization
→ Optional Chemical Precipitation or Flocculation
→ Decanter Centrifuge
→ Clarified Brine + Dewatered Solids

Clarified Brine → RO / MEE / MVR / Crystallizer
Dewatered Solids → Recovery / Filter Press / Disposal

Peony Can Provide

• Wastewater testing and centrifuge selection
• Equalization tank and controlled feed pump
• Optional chemical and flocculant dosing
• Adjustable bowl and differential speed
• Corrosion- and wear-resistant configuration
• Automatic flushing system
• PLC and VFD control
• Integration with evaporation and crystallization systems

Protects Evaporation Equipment

Removes suspended solids before MEE, MVR, heat exchangers, and crystallizers to reduce blockage and erosion.

Reduces Scaling Risk

Separates precipitated salts and metal hydroxides before they accumulate on downstream heat-transfer surfaces.

Continuous Sludge Dewatering

Continuously concentrates solids without the batch cycles of conventional filter presses.

Improves Brine Stability

Produces a more consistent liquid feed for membrane concentration, evaporation, and crystallization.

Corrosion-Resistant Configuration

Materials and seals can be selected according to salinity, pH, chloride content, and operating temperature.

Please provide:

• Flow rate and temperature
• TDS and suspended-solids content
• Particle size and density
• pH and chemical composition
• Target solids concentration
• Downstream ZLD process

Peony welcomes cooperation with ZLD engineering companies, chemical plants, mining and metallurgical projects, high-salinity wastewater contractors, evaporation-system suppliers, distributors, and regional agents.

Send us your wastewater composition, TDS, suspended-solids content, temperature, capacity, corrosion conditions, and downstream ZLD process. Our engineering team will recommend a suitable ZLD pretreatment centrifuge solution.