How Grafil MBR Membrane Works
Grafil MBR (Membrane Bio-Reactor) combines biological treatment with membrane filtration in a single process, replacing the secondary clarifier used in conventional activated sludge systems. Wastewater is treated biologically by activated sludge, then the submerged hollow-fibre membrane physically filters the mixed liquor, producing clear, near-pathogen-free permeate without relying on gravity settling.
Because the membrane provides an absolute physical barrier, Grafil MBR consistently achieves effluent quality that conventional clarifiers cannot match — making it the technology of choice where treated water needs to be reused, not just discharged.
MBR vs MBBR: What's the Difference?
Both add biological treatment capacity, but they solve different problems. MBBR increases the biomass a tank can hold by adding floating plastic media, without changing how the water is separated afterward — you still need a clarifier downstream. MBR replaces the clarifier entirely: a submerged membrane filters the mixed liquor directly, so there is no settling step and no risk of sludge bulking affecting effluent quality. Choose MBBR when you need more biological capacity in an existing tank at lower cost; choose MBR when the treated water needs to be reused or when space for a clarifier is not available. See our detailed comparison guide for the full breakdown.
Technical Specifications
| Parameter | Value |
| Effluent BOD | Below 5 mg/L |
| Effluent TSS | Below 5 mg/L |
| Membrane Type | Submerged hollow fibre |
| Cleaning Cycle | Chemical (CIP) cleaning every 3–6 months |
| Typical Service Life | 5–10 years, depending on treatment conditions |
| Pore Size | 0.04 micron |
| Material | PolyNorbit hydrophilic polymer, hollow fibre |
Applications
- STP/ETP plants requiring treated water reuse
- Space-constrained sites (MBR needs a smaller footprint than clarifier-based systems)
- Hotels, hospitals, and residential complexes with strict discharge norms
- Industrial facilities needing high-quality process water reuse
Why Choose QuaSys Inc. for Grafil MBR Membrane?
QuaSys Inc. is an authorized dealer for Grafil MBR Membrane, supplying complete systems sized to your treatment capacity with full technical documentation, installation support, and ongoing membrane maintenance guidance across India.
Specifications & pricing last verified: 03 Jul 2026
Frequently Asked Questions — Grafil MBR Membrane
Are you an authorized Grafil MBR membrane dealer in India?+
Yes. QuaSys Inc. supplies Grafil MBR membranes across India with sizing support, technical documentation and membrane maintenance guidance. Call +91 95408 15659.
What is the cost of a Grafil MBR membrane system in India?+
QuaSys Inc. does not publish fixed prices online. Grafil MBR membrane cassettes are quoted by plant capacity (KLD), flux design and number of modules. Share your STP capacity and wastewater type. Call +91 95408 15659 for a specification-based quote.
What is the difference between MBR and MBBR technology?+
MBBR uses plastic biofilm carriers in an aeration tank and still needs a secondary clarifier. MBR replaces the clarifier with a hollow-fibre membrane, giving clearer permeate suitable for reuse, at higher capital and energy cost.
What effluent quality does Grafil MBR achieve?+
Grafil MBR systems are designed for effluent BOD below 5 mg/L and TSS below 5 mg/L, with near-complete removal of pathogens and turbidity, subject to a correctly designed biological stage.
How often does an MBR membrane need cleaning or replacement?+
Periodic chemical (CIP) cleaning is done about every 3-6 months to restore flux. Grafil membranes have a service life of 5 to 10 years depending on treatment conditions.
What information do you need to quote an MBR membrane?+
Your plant capacity in KLD, the type of wastewater (sewage or industrial), peak flow, MLSS design, temperature and existing tank sizes. Send these and our team will recommend the module quantity.