Reverse Osmosis System
High-Purity Water via Reverse Osmosis — Pharmaceutical to Industrial Grade
Hydro Engineering Solutions designs and installs Reverse Osmosis systems that remove dissolved salts, heavy metals, and micro-contaminants to produce ultra-pure water — from laboratory-scale units to large industrial plants.
Capacity Range
0.5 – 500 m³/hour
Salt Rejection
Up to 99.5%
Applications
Pharma · Food · Industrial
Feed Sources
Groundwater · Surface · Brackish
Membrane Type
TFC polyamide spiral-wound
Support
CIP, membrane replacement AMC
How It Works
The RO treatment train
A well-engineered RO system is far more than a membrane rack. Pre-treatment protects membranes; post-treatment conditions the permeate; monitoring ensures consistent quality and membrane longevity.
Feed Water Pre-treatment
Multimedia filtration removes suspended solids and turbidity that would foul the RO membranes. Iron and manganese are oxidised and filtered where required. A 5-micron cartridge filter is the final barrier before the high-pressure pump.
Antiscalant Dosing
Antiscalant chemicals prevent scaling of calcium carbonate, calcium sulphate, and silica on membrane surfaces. Dosing rate is calculated from the feed water Langelier Saturation Index and system recovery ratio.
High-Pressure Pumping
A high-pressure pump drives the feed water through the RO membrane elements at pressures of 5–15 bar (brackish water) or 50–80 bar (seawater). Energy recovery devices reduce power consumption on large systems.
Reverse Osmosis Membranes
Semi-permeable polyamide membranes reject dissolved salts, heavy metals, bacteria, and organic molecules. The permeate (pure water) passes through; the concentrate (brine) is managed or reused.
Post-treatment Conditioning
RO permeate is slightly acidic and aggressive. pH adjustment (lime or CO₂ dosing) and remineralisation restore stability for potable use. For industrial use, conductivity is verified against the process specification.
CIP System & Monitoring
Clean-in-Place (CIP) systems restore membrane performance by circulating acid or caustic cleaning solutions. Online TDS, conductivity, and flow monitoring detect membrane degradation early and alert the operator.
Applications
Where RO is the right solution
Pharmaceutical GMP
Purified Water (PW) and Water for Injection (WFI) grade production meeting WHO-GMP and Bangladesh Medicines Directorate requirements.
Food & Beverage
Process water for bottling, ingredient mixing, and CIP cleaning where consistent TDS and microbial quality are non-negotiable.
Electronics Manufacturing
Ultra-pure water for semiconductor and electronics cleaning processes where ionic contamination causes product failure.
Boiler Feed Water
Demineralised water for steam boilers prevents scale formation and corrosion, reducing energy consumption and maintenance costs.
Dialysis Water
RO systems certified to AAMI/ISO 13959 standards for haemodialysis water quality in hospitals and dialysis clinics.
Textile Process Water
Soft, low-TDS water for dyeing and finishing lines reduces chemical consumption and improves colour consistency.
Technical Specifications
Design parameters
| Parameter | Typical Range |
|---|---|
| System Capacity | 0.5 – 500 m³/hour |
| Feed TDS | 200 – 5,000 mg/L (brackish) |
| Permeate TDS | < 50 mg/L (typically < 10 mg/L) |
| Salt Rejection | 97 – 99.5% |
| System Recovery | 65 – 80% (feed-water dependent) |
| Operating Pressure | 5 – 15 bar (brackish water) |
| Feed SDI | < 5 (after pre-treatment) |
| Feed Temperature | 15 – 35 °C |
| Membrane Lifespan | 3 – 5 years (with proper CIP) |
| Power Consumption | 0.4 – 1.2 kWh/m³ permeate |
Why Hydro Engineering Solutions
System design that protects your membrane investment
Feed water analysis first
We characterise your source water fully before designing the pre-treatment train — the most common cause of premature membrane failure is pre-treatment undersized for the actual feed water chemistry.
Recovery optimisation
We model recovery ratios against your feed water scaling indices to maximise water production while preventing scaling and fouling — balancing water efficiency with membrane longevity.
CIP-ready design
Every system is designed with a CIP circuit integrated from the outset — not retrofitted. This means membrane cleaning is practical and routine, not an emergency procedure.
Remote monitoring integration
Online TDS, conductivity, flow, and pressure monitoring can be integrated with our SCADA offering so your quality team sees real-time RO performance from any device.
Get Started
Discuss your purity requirements
Share your feed water quality, required output capacity, and purity targets. We'll design a system matched to your process.
- ✓Feed water characterisation and analysis
- ✓System sizing and recovery modelling
- ✓Pre-treatment and CIP circuit design
- ✓Remote monitoring integration options
Request a Free Consultation
No obligation. Our engineering team responds within 1 business day.