R.O Water Treatment Plant

💧 REVERSE OSMOSIS (R.O.) WATER TREATMENT PLANT

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📘 1. What is an RO Water Treatment Plant?

An RO plant is a multi-stage water purification system that uses semipermeable membranes to remove salts, minerals, bacteria, viruses, and impurities from water by applying pressure.

• RO = Reverse Osmosis, where water moves from high salt concentration to low, across a membrane, under pressure.

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🧩 2. Major Components of an RO Plant

Component	Function
Raw Water Pump	Lifts feed water into the system
Pressure Sand Filter (PSF)	Removes suspended solids
Activated Carbon Filter (ACF)	Removes chlorine, organic impurities, and odors
Micron Cartridge Filter (MCF)	Filters particles >5/10 microns before RO
High-Pressure Pump (HPP)	Increases pressure for RO membrane (up to 10–15 bar)
RO Membrane Housing	Contains spiral-wound membranes
RO Membranes	Removes TDS, bacteria, heavy metals
Product Water Tank	Stores treated water
Reject Line	Discharges concentrated brine
Control Panel	Automates and monitors the process
Dosing Systems (optional)	pH correction, antiscalant, disinfection

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⚙️ 3. Working Process – Step by Step

🟦 Step 1: Feed Water Supply

• Raw water (borewell, municipal, etc.) enters via a feed pump

🟩 Step 2: Pre-treatment

1. Pressure Sand Filter (PSF) – removes mud, turbidity
2. Activated Carbon Filter (ACF) – removes color, odor, chlorine
3. Micron Cartridge Filter (MCF) – removes fine particles ≥5 microns
4. Dosing Pumps (if used) – add antiscalant and pH adjuster

🟥 Step 3: High-Pressure Pump (HPP)

• Increases pressure (typically 10–15 bar) for membrane filtration

🟨 Step 4: RO Membrane Separation

• Pressurized water passes through RO membranes
• Produces:
  • Permeate (Product Water) – 95–99% pure
  • Reject (Brine) – high in salts and contaminants

🟫 Step 5: Post-treatment (if required)

• UV disinfection
• pH correction
• Mineral dosing (for drinking water)

🟧 Step 6: Storage and Distribution

• Treated water stored in tanks
• Used for drinking, industrial use, bottling, etc.

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🧮 4. Design Parameters (Example)

Parameter	Value (Typical)
Input TDS	< 2000 ppm (standard RO), < 5000 ppm (high TDS)
Recovery Rate	50–70% (varies by design)
Operating Pressure	10–15 bar
Permeate TDS	< 50 ppm (ideal for drinking)
Flow Rate	250 LPH to 100 m³/day (based on need)

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🏗️ 5. Installation Procedure

✅ Site Preparation

• Level surface (RCC or steel platform)
• Drainage point for reject/brine
• Electrical connections
• Feed water connection

✅ Mounting Equipment

• Fix filtration units (PSF, ACF)
• Install dosing systems
• Mount RO membranes inside pressure vessels
• Connect piping (SS or UPVC)

✅ Electrical Panel Wiring

• Connect motors, dosing pumps, and sensors to the control panel
• Setup level sensors in tanks

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🔎 6. Testing & Commissioning

• Check all mechanical and electrical connections
• Flush system before use
• Monitor parameters:
  • Inlet TDS, Product TDS
  • Flow rate (permeate and reject)
  • Pressure gauges, pH
• Test product water for compliance with IS 10500 (drinking) or industrial use standards

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🔧 7. Operation & Maintenance (O&M)

Task	Frequency
Backwash PSF & ACF	Daily
Replace micron cartridge	Monthly
Clean RO membranes (CIP)	Every 3–6 months
Check pressure & TDS	Weekly
Dosing chemical top-up	As required
Replace membranes	Every 2–3 years (based on TDS and usage)

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🛡️ 8. Safety & Best Practices

• Install pressure relief valves
• Ensure proper electrical earthing
• Use only RO-compatible chemicals
• Never operate without feed water
• Monitor TDS drift, it can indicate membrane fouling

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📂 9. Documents to Maintain

• Water test reports (raw & product)
• Commissioning checklist
• Equipment warranty and datasheets
• O&M manual
• Daily log sheet (TDS, flow, pressure)

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🏷️ 10. Types of RO Systems by Use

Application	Capacity	Features
Domestic RO	10–25 LPH	Wall-mounted, UV, compact
Commercial RO	50–500 LPH	Used in hotels, schools
Industrial RO	1–100 m³/day	Fully automated, PLC control
Containerized RO	Variable	Portable, skid-mounted
Brackish/Sea Water RO	Specialized	Higher pressure, corrosion-proof