RO Plant · Reverse Osmosis Systems
Industrial RO Plants — 99% TDS Removal, Engineered for India's Water
Unicare manufactures reverse osmosis plants from 500 LPH to 1,00,000 LPH — removing dissolved salts, heavy metals, bacteria, and biological contaminants from bore well, brackish, and municipal feed water. Engineered in multiple stages (3, 4, 5, 7-pass) to match your source water TDS and product water quality requirement.
- Up to 99% TDS Removal
- 500 LPH – 1,00,000 LPH
- Multi-stage (3–7 pass)
- Drinking Water · Boiler Feed · Pharma
- India-wide AMC
Overview
Membrane-based purification — remove what other technologies miss
A Reverse Osmosis (RO) plant forces pressurised water through a semi-permeable membrane — the pores of which are 0.0001 microns, smaller than a water molecule's contaminants. Dissolved salts, heavy metals, hardness minerals, bacteria, viruses, and organic compounds are rejected by the membrane and discharged as concentrate (reject water). The purified water — permeate — passes through for use.
Unicare designs and manufactures RO plants in multiple stages (3, 4, 5, and 7-pass configurations) depending on your source water TDS and the required product water quality. A bore well in Maharashtra with TDS of 1,500 ppm needs a different membrane configuration and pretreatment train than a municipal water source at 400 ppm. We assess source water before specifying any RO system — oversizing wastes CAPEX, undersizing risks membrane fouling and performance failure.
Our RO plants are used for safe drinking water production, boiler feed water, pharmaceutical process water, food and beverage manufacturing, haemodialysis pre-treatment, ion exchange pre-treatment, and industrial process water. Each plant comes with a complete pretreatment train, high-pressure pump, membrane housing array, instrumentation, and post-treatment where required — skid-mounted and ready for connection.
99%
Typical TDS rejection rate
500 LPH – 1,00,000 LPH
Capacity range
3–7 Pass
Multi-stage configurations
<10 ppm
Achievable product water TDS
Process
How a Unicare RO plant works — stage by stage
Step 01
Raw water intake & screening
Feed water from bore well, municipal supply, surface water, or brackish source enters the system through a raw water tank and intake screen. A raw water pump delivers water at constant pressure to the pre-treatment train. Source TDS, SDI, iron, and turbidity are the key parameters assessed before pre-treatment design.
Step 02
Multi-media pre-filtration (MMF)
Water passes through a multi-media filter vessel containing layers of graded sand, gravel, and anthracite. This removes suspended particles, turbidity, and silt down to 10–20 microns — protecting the downstream cartridge filter and RO membranes from physical fouling.
Step 03
Activated carbon filtration (ACF)
An activated carbon filter removes residual chlorine, chloramines, organic compounds, colour, and odour from the feed water. Chlorine is particularly damaging to thin-film composite (TFC) RO membranes — activated carbon ensures the membrane is protected before the feed water reaches the high-pressure pump.
Step 04
Antiscalant dosing & cartridge filtration
A chemical antiscalant is dosed into the feed line to prevent calcium carbonate, calcium sulphate, and silica scaling on the membrane surface during operation. A 5-micron cartridge filter downstream provides the final particle barrier before the high-pressure pump — protecting pump impellers and membrane elements from fine debris.
Step 05
High-pressure pump & RO membrane array
The high-pressure pump raises feed pressure to 8–15 bar (brackish water) or 55–70 bar (seawater) depending on source TDS. The pressurised feed water is distributed across an array of spiral-wound TFC membrane elements housed in FRP or SS pressure vessels. The membrane rejects dissolved salts, heavy metals, bacteria, and organics — passing only purified permeate water. Reject (concentrate) is discharged to drain or recycled to improve recovery.
Step 06
Post-treatment & product water storage
Depending on application, permeate water may receive post-treatment: UV sterilisation for drinking water, remineralisation for palatability, pH correction (CO2 removal / NaOH dosing), or polishing via mixed-bed deionisation for pharmaceutical or ultrapure applications. Purified water is stored in a food-grade SS or FRP product tank and distributed to point of use via a product water pump.
Models
RO plant configurations — drinking water to industrial process
Packaged Drinking Water RO Plant
- Capacity: 500 LPH – 5,000 LPH
- Feed TDS: Up to 2,000 ppm (bore well / municipal)
- Product TDS: <150 ppm (potable water standard)
- Stages: 3–4 pass configuration
- Best for: Apartments, housing societies, schools, offices, hospitals, restaurants, water ATM feed supply
- Features: Pre-filter + ACF + 5-micron cartridge pre-treatment; High-pressure pump (SS impeller); 4040 or 8040 TFC membrane elements; SS / FRP product tank; UV steriliser post-treatment; Auto flush on shutdown; Digital TDS display & flow meter
Commercial RO Plant
- Capacity: 5,000 LPH – 30,000 LPH
- Feed TDS: Up to 3,000 ppm (brackish bore well)
- Product TDS: <100 ppm
- Stages: 4–5 pass configuration
- Best for: Hotels, hospitals, food processing units, commercial buildings, pharmaceutical facilities (pre-RO), boiler feed water pre-treatment
- Features: MMF + ACF + antiscalant dosing + 5-micron cartridge; High-pressure multistage pump (SS); 8040 TFC membrane elements (Dow/Hydranautics/Toray); Automatic control panel with PLC; Online TDS monitor, flow totaliser, pressure gauges; Auto flush, high-low pressure switches, conductivity meter; Recovery rate: 65–75%; Skid-mounted, SS frame, ready to connect
Industrial RO Plant
- Capacity: 30,000 LPH – 1,00,000+ LPH
- Feed TDS: Up to 5,000+ ppm (high-TDS brackish / surface water)
- Product TDS: <10 ppm (achievable with 2-pass design)
- Stages: 5–7 pass, 2-pass configuration available
- Best for: Power plants (boiler feed), pharmaceutical manufacturing, food & beverage production, semiconductor manufacturing, textile industry, municipal water supply, ETP/STP treated water reuse (tertiary RO)
- Features: Full pre-treatment train: coagulation + MMF + ACF + softener or antiscalant + 5-micron cartridge; High-pressure pump with VFD for energy efficiency; 8040 TFC membrane elements in multi-vessel arrays; SCADA / PLC control with remote monitoring; Online conductivity, pH, flow, and pressure instrumentation; Energy recovery device (ERD) for high-TDS applications; Recovery rate: 70–80% (with recirculation); CIP system for membrane cleaning; Custom skid or containerised configuration
Specifications
Technical specifications — indicative
| Parameter | Packaged (500–5K LPH) | Commercial (5K–30K LPH) | Industrial (30K–1,00,000+ LPH) |
|---|---|---|---|
| Capacity | 500–5,000 LPH | 5,000–30,000 LPH | 30,000–1,00,000+ LPH |
| Feed TDS (max) | 2,000 ppm | 3,000 ppm | 5,000+ ppm |
| Product TDS | <150 ppm | <100 ppm | <10 ppm (2-pass) |
| TDS rejection rate | Up to 97% | Up to 98% | Up to 99%+ |
| Stages / pass | 3–4 pass | 4–5 pass | 5–7 pass / 2-pass |
| Pre-treatment | MMF + ACF + cartridge | MMF + ACF + antiscalant | Coagulation + MMF + ACF + softener + antiscalant |
| Membrane type | 4040 / 8040 TFC | 8040 TFC | 8040 TFC (Dow/Hydranautics/Toray) |
| Membrane housing | FRP | FRP / SS | SS / FRP multi-vessel |
| High-pressure pump | Multistage SS | Multistage SS | VFD-controlled multistage SS |
| Recovery rate | 60–70% | 65–75% | 70–80% (with recirculation) |
| Control system | Manual / basic auto | PLC + HMI panel | SCADA / PLC with remote access |
| Post-treatment | UV steriliser | UV + conductivity monitor | UV + deionisation + CIP |
| Product tank | SS / FRP (included) | SS / FRP (included) | SS / FRP (custom capacity) |
| Frame | SS skid | SS skid | SS skid / containerised |
| Power supply | 230V / 415V AC | 415V AC | 415V AC (VFD) |
| AMC available | Yes | Yes | Yes (comprehensive) |
Specifications are indicative. Final design is validated against source water analysis (TDS, pH, hardness, iron, SDI, turbidity, chlorine), required product quality, and peak flow demand. Submit your water analysis report or request a free site assessment for accurate sizing.
Features
Engineered for India's water — built for continuous operation
Multi-stage configuration (3–7 pass)
Unicare RO plants are available in 3, 4, 5, and 7-pass configurations depending on source water TDS. High-TDS bore well water (1,500–5,000 ppm) requires more membrane stages than municipal feed water (400–800 ppm). We design the correct number of passes — not the cheapest.
Premium TFC membranes (Dow, Hydranautics, Toray)
We specify membranes from globally trusted manufacturers — Dow Filmtec, Hydranautics (Nitto), or Toray — for consistent rejection performance, long service life, and reliable CIP recovery. Membrane brands specified in writing before order confirmation.
Complete pre-treatment train
An RO membrane is only as good as its pre-treatment. Every Unicare RO plant includes a pre-treatment train sized for your feed water: multimedia filtration, activated carbon, antiscalant dosing or softener, and cartridge filtration — protecting membranes from physical, chemical, and biological fouling.
High-pressure SS multistage pump with VFD
Industrial models use Variable Frequency Drive (VFD) controlled pumps for energy efficiency — reducing power consumption at partial load and extending pump life. All pumps are stainless steel for corrosion resistance with Indian bore well water conditions.
Auto-flush on shutdown
Every Unicare RO plant includes automatic flush on shutdown — flushing the membrane with low-pressure feed water to remove concentrated reject and prevent scaling during idle periods. Critical for plants that are not operated 24/7.
Online instrumentation
Feed and product TDS/conductivity meters, flow totaliser, pressure gauges on feed, reject, and permeate lines, and low/high pressure switches are standard. Commercial and industrial plants include PLC control panel with HMI display showing all operating parameters.
CIP (Clean-In-Place) system
Industrial plants include a CIP (Clean-In-Place) system for periodic chemical cleaning of membranes — restoring flux and rejection performance when fouling is detected. Reduces need for membrane replacement and extends plant life.
High recovery rate — 65–80%
Unicare RO systems are designed for 65–80% water recovery — meaning 65–80% of feed water becomes purified permeate and only 20–35% is discharged as reject. Reject recirculation options improve recovery further, reducing water wastage.
Skid-mounted, ready to connect
All plants are assembled and factory-tested on a stainless steel skid before dispatch. Site work is limited to connecting feed inlet, product outlet, reject drain, and power — reducing installation time and civil scope significantly.
Our plants
Unicare RO plants — installed across India
Applications
Where Unicare RO plants are installed
Drinking water — residential & institutional
Safe drinking water production for apartments, housing societies, schools, colleges, offices, and community water supply. Output meets BIS IS 10500 drinking water standard. Typically 500–5,000 LPH packaged configuration.
Hotels, hospitals & commercial buildings
Consistent low-TDS water for kitchens, laundries, HVAC cooling towers, and medical facilities. Hospitals additionally specify RO for haemodialysis pre-treatment and sterile process water. 5,000–30,000 LPH commercial configuration.
Boiler feed water — power & process industries
Hardness and dissolved solids in boiler feed water cause scale and corrosion that reduces boiler efficiency and causes tube failure. RO-treated boiler feed water (TDS <50 ppm) dramatically reduces chemical treatment cost and extends boiler life.
Pharmaceutical & biotechnology
Pharmaceutical manufacturing requires purified water (PW) and water for injection (WFI) meeting USP/IP standards. RO is the primary purification step before polishing with mixed-bed deionisation, electrodeionisation (EDI), and ultrafiltration.
Food & beverage processing
Breweries, dairies, beverage manufacturers, and packaged food plants need process water that meets FSSAI quality specifications. RO removes dissolved solids, organics, and microbial contaminants to deliver consistent process-ready water.
STP & ETP treated water reuse (tertiary RO)
RO is increasingly used as a tertiary treatment step after STP or ETP biological treatment — producing near-potable water from treated sewage for industrial reuse, cooling tower makeup, or irrigation. Combined STP + RO systems offer zero liquid discharge (ZLD) pathways for water-stressed industries.
Source water guide
What RO plant do you need? — source water TDS guide
| Feed water source | Typical TDS (ppm) | Recommended configuration | Recovery |
|---|---|---|---|
| Municipal tap water (city) | 200–500 | 3-pass packaged RO, no softener | 70–75% |
| Bore well — low TDS | 500–1,000 | 3–4 pass RO + antiscalant | 65–70% |
| Bore well — medium TDS | 1,000–2,000 | 4–5 pass RO + softener/antiscalant | 65–70% |
| Bore well — high TDS | 2,000–5,000 | 5–7 pass brackish water RO | 60–65% |
| Surface water (river/lake) | 100–800 + turbidity | RO + coagulation + MMF pre-treatment | 70–75% |
| STP/ETP treated effluent | 500–2,000 | Tertiary RO — 4–5 pass | 60–70% |
| Boiler condensate polishing | <100 | Polishing RO + mixed-bed DI | 80–85% |
TDS alone does not determine RO system design. Iron, silica, hardness, SDI (Silt Density Index), chlorine, pH, and temperature all affect membrane selection and pre-treatment design. Submit your source water analysis report for an accurate system recommendation.
Submit your water analysis for a free assessment →Performance
RO plant performance — at a glance
Up to 99%
TDS rejection from feed water
<10 ppm
Product water TDS achievable (2-pass)
65–80%
Water recovery rate — low waste
3–7 Pass
Configuration options for any feed water
FAQs
RO plant — common questions
1What is an RO plant and how does it work?
2What is the difference between RO plant stages or passes?
3What pre-treatment does an RO plant need?
4What TDS can a Unicare RO plant achieve?
5What is the water recovery rate of an RO plant?
6How often do RO membranes need replacement?
7What is CIP (Clean-In-Place) and when is it needed?
8Can an RO plant treat STP-treated sewage for reuse?
9What capacity RO plant do I need?
10Do you provide installation, commissioning, and AMC for RO plants?
11What is the difference between a packaged RO plant and a skid-mounted plant?
Get the right RO plant for your water and application
Share your source water TDS, feed water source (bore well / municipal / surface), required product flow rate (LPH or KLD), and application (drinking water / boiler feed / pharmaceutical / food processing). Our engineers will design the right multi-stage configuration, pre-treatment train, and membrane specification for your conditions.
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