Distinguish scaling, biofouling, colloidal and organic fouling mechanisms from performance and chemistry data.
Engineering & Maintenance
Reverse Osmosis Membrane Maintenance and Fouling Control in Desalination Plants
Diagnose and control reverse osmosis membrane fouling in desalination plants through performance normalisation, membrane autopsy, cleaning-in-place programmes and dosing control.
🗓️Duration5 training days
📚Content4 modules · 8 sessions
🎓On completionAccredited attendance certificate
About the programme
Course Overview
A reverse osmosis train that loses permeate flow or salt rejection is rarely broken in any single obvious way; the cause is usually a fouling mechanism that built up quietly in the pretreatment stage or the first metres of membrane. This course teaches how to diagnose and control that fouling before it drives up energy cost or forces early membrane replacement. Participants distinguish scaling, biofouling, colloidal and organic fouling using feedwater chemistry and performance symptoms, monitor pretreatment and Silt Density Index results, and normalise permeate flow and salt rejection data to separate genuine decline from seasonal noise. Further sessions cover membrane autopsy technique, differential pressure diagnostics, cleaning-in-place protocols and chemical selection, and antiscalant and biofouling dosing programmes. The final module addresses the mechanical side - high-pressure pump and energy recovery device maintenance - and closes with membrane replacement planning based on normalised lifecycle data. Teaching uses feedwater and performance datasets, autopsy case evidence and dosing calculations worked through as plant-realistic exercises. Participants leave able to turn a performance trend into a specific, correctly targeted maintenance response.
Expected Learning Outcomes
Monitor pretreatment performance and Silt Density Index results to protect membrane trains.
Normalise permeate flow and salt rejection data to detect genuine membrane performance decline.
Interpret membrane autopsy and differential pressure findings to select the correct corrective action.
Plan cleaning-in-place programmes and chemical selection matched to identified fouling types.
Set antiscalant dosing and biofouling control programmes for feedwater conditions.
Schedule membrane replacement using normalised performance and lifecycle data.
Who Should Attend
Process and maintenance engineers at desalination and water treatment plants.
Membrane system operators responsible for cleaning and fouling control programmes.
Plant reliability engineers monitoring reverse osmosis train performance.
Water treatment chemists managing pretreatment and dosing programmes.
Asset managers planning membrane replacement and lifecycle budgets.
Commissioning engineers bringing new reverse osmosis trains into stable operation.
Course Modules
Select any module to see its sessions and points.
01Membrane Fouling Mechanisms and Feedwater Quality
2 sessions · 8 points
Session 1Identifying Scaling, Biofouling, Colloidal and Organic Fouling
- Distinguish scaling, biofouling, colloidal and organic fouling using feedwater chemistry and membrane performance symptoms.
- Interpret Langelier Saturation Index results to assess scaling risk in the concentrate stream.
- Trace a sudden differential pressure rise to a likely fouling mechanism using stage-by-stage data.
- Assess seasonal feedwater changes, such as temperature or algae bloom, for their effect on fouling risk.
Session 2Pretreatment Performance and SDI Monitoring
- Monitor Silt Density Index results to judge whether pretreatment is conditioning feedwater adequately.
- Diagnose a media filtration or ultrafiltration performance drop using backwash and turbidity trend data.
- Assess cartridge filter differential pressure trends to set an appropriate replacement interval.
- Adjust pretreatment chemical dosing in response to a feedwater quality change before it reaches the membranes.
02Membrane Performance Monitoring and Diagnostics
2 sessions · 8 points
Session 1Normalising Permeate Flow and Salt Rejection Data
- Normalise permeate flow and salt rejection data to remove temperature and pressure effects from trend analysis.
- Distinguish a genuine membrane performance decline from a normalisation calculation error.
- Use normalised trend data to forecast when cleaning-in-place will be required for a given train.
- Present normalised performance trends to plant management to justify a cleaning or replacement decision.
Session 2Membrane Autopsy and Differential Pressure Analysis
- Plan a membrane autopsy sampling strategy that captures representative fouling evidence from a failing element.
- Interpret membrane autopsy findings to confirm or rule out a suspected fouling or scaling mechanism.
- Read differential pressure data across pressure vessel stages to localise a fouling or channelling problem.
- Recommend a corrective action, such as cleaning, pretreatment adjustment or replacement, based on autopsy evidence.
03Cleaning and Chemical Control Programmes
2 sessions · 8 points
Session 1Cleaning-in-Place Protocols and Chemical Selection
- Select acid or alkaline cleaning chemistry appropriate to the fouling type identified in prior diagnostics.
- Sequence a cleaning-in-place cycle through soak, circulation and rinse stages to protect membrane integrity.
- Verify cleaning effectiveness by comparing normalised performance before and after a cleaning-in-place cycle.
- Decide when repeated cleaning has reached diminishing returns and replacement should be considered instead.
Session 2Antiscalant Dosing and Biofouling Control Programmes
- Set antiscalant dosing rates matched to feedwater hardness and recovery ratio targets.
- Plan a chlorination and dechlorination sequence that controls biofouling without damaging membrane elements.
- Assess biocide dosing programmes for their effectiveness against biofilm formation in pretreatment and membrane trains.
- Adjust dosing strategy in response to a membrane autopsy or performance trend indicating fouling recurrence.
04Mechanical Systems and Membrane Lifecycle Management
2 sessions · 8 points
Session 1High-Pressure Pump and Energy Recovery Device Maintenance
- Inspect high-pressure pump seals, bearings and impellers for wear affecting plant energy efficiency.
- Diagnose an energy recovery device performance drop using pressure and flow instrumentation data.
- Plan a high-pressure pump maintenance outage that minimises disruption to plant production targets.
- Interpret vibration and performance data to schedule energy recovery device maintenance before failure.
Session 2Membrane Replacement Planning and Plant Performance Normalisation
- Plan a membrane replacement schedule using normalised performance decline and warranty considerations.
- Sequence element replacement across pressure vessels to restore train performance efficiently.
- Use plant performance normalisation software output to compare trains and prioritise replacement budget.
- Report membrane lifecycle and fouling control performance to plant management using normalised trend evidence.
What the participant receives
4 course modules
A structured syllabus
8 training sessions
across 5 days
32 detailed points
Applied, detailed content
Accredited attendance certificate
On completing the programme
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