Reverse Osmosis Plants
High-purity water production through pressure-driven membrane separation — for desalination, demineralisation, and industrial process water applications.
High-purity water production through pressure-driven membrane separation — for desalination, demineralisation, and industrial process water applications.
Overview
Reverse Osmosis is the most widely deployed membrane technology for water purification worldwide — and for good reason. By forcing water through a semi-permeable membrane under pressure, RO removes dissolved salts, heavy metals, organics, bacteria, and virtually all contaminants to produce water of exceptional purity.
HPT designs and manufactures RO plants for a broad range of applications — from small industrial skids producing a few hundred litres per hour to large multi-stage plants treating thousands of cubic metres per day. Our systems are engineered around your source water TDS, required output quality, recovery targets, and energy constraints.
How It Works
Feed water passes through multimedia filters and/or UF to remove turbidity and SDI before the membranes.
Chemical dosing prevents scale formation on RO membranes, protecting flux and extending service life.
Feed pump applies operating pressure of 5–80 bar depending on feed TDS and membrane type.
Water permeates through semi-permeable membranes; dissolved solids are concentrated and rejected.
High-purity product water is collected from the permeate side and routed to storage or process.
Reject stream managed by ZLD, evaporator, or site disposal in compliance with discharge norms.
Key Features
Two-pass configurations for ultra-high purity. Staged systems for high recovery rates on challenging feeds.
Suitable for feed TDS from 500 ppm (brackish) up to 45,000 ppm (seawater) with appropriate membrane selection.
Pressure exchangers and energy recovery devices reduce operating costs on high-pressure seawater applications.
Automated flush cycles, high-pressure protection, conductivity monitoring, and remote SCADA connectivity.
Dow, Toray, Hydranautics, and other leading brands selected based on application requirements and longevity.
System design targets maximum recovery to reduce waste, concentrate volume, and disposal costs.
Applications
Industries Served
Wherever the source water contains dissolved solids that cannot be removed by conventional filtration, RO is the technology of choice. HPT's systems are engineered for the full range of source water quality — from mild brackish water to challenging seawater feeds.
Configurations
The most common RO configuration for industrial process water, drinking water schemes, and boiler feed pre-treatment across India.
For high-TDS groundwater, industrial effluent recycle, and applications requiring elevated operating pressure and robust pre-treatment.
Coastal and offshore desalination with energy recovery devices. Designed for minimum OPEX while meeting strict product quality targets.
Our Approach
Complete ionic analysis, TDS, SDI, temperature, pH, and scaling index determination before any system specification.
Membrane selection, staging, recovery target, pre-treatment train, and energy recovery — all balanced against your OPEX constraints.
Skid fabrication, FAT, site installation, commissioning, and handover with performance verification against agreed parameters.
RO system performance is only as good as the engineering behind it. HPT conducts detailed source water analysis before specifying any system — TDS, ionic composition, SDI, temperature, and pH all influence membrane selection, pre-treatment design, and recovery targets. We design systems that optimise the balance between recovery, energy consumption, and membrane life — not systems that just meet minimum specs on paper.
Specifications
Specifications are indicative. Final parameters are determined after source water analysis, recovery study, and application review.
| Parameter | Typical Range | Notes |
|---|---|---|
| Capacity | 100 LPH – 1000 m³/hr | Modular, multi-train |
| Feed TDS | 500 – 45,000 ppm | Application dependent |
| Product TDS | < 50 ppm | Up to <10 ppm (two-pass) |
| Recovery Rate | 35% – 85% | Source water dependent |
| Salt Rejection | 97% – 99.7% | Membrane grade dependent |
| Operating Pressure | 5 – 80 bar | Source TDS dependent |
Related Solutions
Ideal pre-treatment for RO — reduces SDI, protects membranes, and extends service intervals.
Treat and recover the RO concentrate stream — achieving zero liquid waste from your facility.
Conventional clarification and filtration as primary treatment before RO for surface water sources.
Share your source water TDS, required output quality, and daily volume. We'll design a system that hits your targets.
Talk to Our Engineers