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Ultrafiltration Plant

In wastewater treatment, ultra-filtration (UF) devices are used to recycle and reuse water that contains virtually no physical solids. Ultra-filtration is a membrane separation process in which hydrostatic pressure forces a liquid against a semi-permeable membrane.

Membrane Separation & Water Reclamation

In wastewater treatment, ultra-filtration (UF) devices are used to recycle and reuse water that contains virtually no physical solids. Ultra-filtration is a membrane separation process in which hydrostatic pressure forces a liquid against a semi-permeable membrane. Suspended solids and solutes of high molecular weight are retained, while water and low molecular weight solutes pass through the membrane.

Ultrafiltration is widely applied downstream of secondary biological treatment systems as an advanced polishing stage, or as effective pre-treatment to Reverse Osmosis (RO) systems, protecting expensive RO membranes from fouling.

Integrated Treatment Trains Designed by EESPL

EESPL engineers turnkey Ultrafiltration systems that integrate seamlessly with various biological and physical treatment processes, including:

  • Extended Aeration
  • Submerged Aeration Fixed Film (SAFF)
  • Anaerobic Treatment
  • Sequencing Batch Reactor (SBR)
  • Moving Bed Bio Reactor / Fluidized Aerobic Bio-Reactor (MBBR/FAB)
  • Membrane Bio-Reactor (MBR)
  • Submerged Biological Treatment (SBT)

Key Features & Engineering Advantages

  • Retention of suspended solids, colloids, bacteria, and macromolecules down to 0.01 to 0.1 microns
  • Hydrostatic pressure driven process with high flux and consistent permeate quality
  • Critical pre-treatment stage protecting Reverse Osmosis (RO) membranes from colloidal fouling
  • Automated backwash and chemical enhanced backwash (CEB) cycles
  • Modular skid-mounted design for rapid on-site erection and commissioning

Treatment Process & Methodology

1. Pre-filtration / Disc Filtration: Removal of particulates larger than 100-150 microns to safeguard UF fibers.

2. Membrane Ultrafiltration: Pressurized crossflow or dead-end filtration through semi-permeable capillary fibers.

3. Permeate Collection: High-clarity, SDI < 3 treated water collected for immediate utility reuse or RO feed.

4. Automated Backwash: High-rate reverse flow cleaning using filtered permeate to dislodge surface cake.

5. Chemical Enhanced Backwash (CEB): Periodic chemical cleaning with dilute chlorine/acid for flux restoration.

Applicable Industries & Sectors

Tertiary Wastewater Reclamation & Polishing Pre-treatment to Reverse Osmosis (RO) Systems Drinking Water Clarification & Disinfection Industrial Process Water Recovery Boiler Feed & Cooling Tower Makeup Water

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