About this role
The RO Plant Operator is responsible for operating, monitoring, and maintaining the Reverse Osmosis (RO) water treatment plant to ensure a continuous supply of treated water as per required quality specifications.
The operator must monitor raw water quality, chemical dosing, filtration systems, RO membrane performance, operating pressure, flow rates, TDS, conductivity, and other water quality parameters.
The operator is also responsible for routine equipment inspections, preventive maintenance support, water quality testing, chemical handling, maintaining operating records, and following plant safety and environmental procedures.
3. Roles and Responsibilities
A. RO Plant Operation
Operate industrial Reverse Osmosis (RO) water treatment systems.
Start and stop the RO plant according to approved SOPs.
Monitor raw water supply and treated water production.
Check feed water pressure and RO pump discharge pressure.
Monitor permeate flow and reject water flow.
Maintain required operating pressure and flow as per approved operating parameters.
Monitor RO plant performance during operation.
Check automatic and manual valves.
Monitor high-pressure pump operating conditions.
Ensure uninterrupted treated water supply to the utility and production departments.
Report abnormal plant operating conditions to the supervisor.
B. Raw Water Treatment
Monitor raw water storage tank levels.
Check raw water supply quality.
Operate raw water transfer pumps.
Monitor pressure sand filters (PSF).
Monitor activated carbon filters (ACF).
Perform filter backwashing and rinsing according to SOP.
Monitor water turbidity and suspended solids.
Check filter pressure drop.
Ensure proper filtration before RO feed.
C. Chemical Dosing System
Prepare and handle treatment chemicals according to approved procedures.
Monitor antiscalant dosing.
Monitor sodium metabisulphite (SMBS) dosing, where applicable.
Monitor pH correction chemical dosing, where applicable.
Check chemical dosing pump operation.
Monitor chemical tank levels.
Maintain chemical consumption records.
Ensure correct chemical concentration and dosing as per SOP.
Follow chemical handling and PPE requirements.
D. RO Membrane Operation
Monitor RO membrane performance.
Check feed pressure and differential pressure.
Monitor permeate flow rate.
Monitor reject flow rate.
Check permeate conductivity and TDS.
Observe changes in membrane performance.
Identify signs of membrane fouling and scaling.
Monitor membrane cleaning requirements.
Support CIP (Cleaning in Place) activities as per approved procedures.
Maintain RO membrane operating records.
E. Water Quality Testing
The operator should perform routine water quality testing.
Parameter
Purpose
pH
Measures acidity or alkalinity
TDS
Measures total dissolved solids
Conductivity
Indicates dissolved ionic content
Turbidity
Measures water clarity
Hardness
Indicates calcium and magnesium content
Chlorine
Checks residual chlorine, where applicable
SDI
Indicates fouling potential of feed water
Temperature
Monitors water operating conditions
Collect raw water and treated water samples.
Perform routine water quality checks.
Record test results in the logbook.
Compare results against approved specifications.
Immediately report out-of-specification results.
Coordinate with the QC laboratory when required.
F. RO Plant Equipment Monitoring
Inspect high-pressure pumps.
Monitor low-pressure feed pumps.
Check cartridge filter condition.
Inspect pressure gauges and flow meters.
Monitor conductivity meters and pH meters.
Check dosing pumps and chemical tanks.
Monitor pressure vessels and membrane housings.
Inspect pipelines, valves, and flange connections.
Check abnormal vibration, noise, and leakage.
Maintain standby equipment readiness.
G. Preventive Maintenance
Perform routine inspection of RO equipment.
Monitor cartridge filter differential pressure.
Coordinate cartridge filter replacement.
Check pump lubrication and seal leakage.
Inspect dosing pump operation.
Monitor membrane performance trends.
Coordinate RO membrane cleaning activities.
Check instrument calibration status.
Report equipment abnormalities to maintenance.
Maintain preventive maintenance records.
H. Treated Water Storage and Distribution
Monitor treated water storage tank levels.
Operate treated water transfer pumps.
Ensure continuous supply to production and utility departments.