Polishing Plant Operation And Control Training

Objectives:
• Understand the purpose and principles of polishing plants in water treatment.
• Identify key components and their functions in a polishing plant.
• Recognize safety protocols and environmental considerations.
• Describe the role of polishing plants in achieving final water quality standards.

Topics:
• Overview of water treatment processes and polishing plant position
• Key components: filters, membranes, chemical dosing systems
• Basic principles of filtration and ion exchange
• Safety, health, and environmental regulations (e.g., OHS Act, SANS 241)
• Introduction to process flow diagrams and P&IDs
• Quality parameters: turbidity, TDS, pH, conductivity
• Plant documentation and record-keeping requirements

Objectives:
• Explain critical water quality parameters and their significance.
• Perform basic water sampling and testing procedures.
• Interpret laboratory results and identify deviations.
• Understand chemical reactions involved in polishing processes.

Topics:
• Physical, chemical, and microbiological parameters
• Sampling techniques, frequency, and chain of custody
• On-site testing: pH, conductivity, turbidity, chlorine residual
• Coagulation, flocculation, and precipitation chemistry
• Scaling and corrosion indices (LSI, RSI)
• Interpreting water quality reports and trending data
• Corrective actions for out-of-spec parameters

Objectives:
• Describe the operation and maintenance of key equipment.
• Identify instrumentation used for monitoring and control.
• Calibrate common sensors and analyzers.
• Troubleshoot equipment malfunctions.

Topics:
• Multimedia filters, cartridge filters, and membrane systems (UF, RO)
• Chemical dosing pumps and mixers
• Flow meters, pressure gauges, level transmitters
• Online analyzers: pH, conductivity, turbidity, TOC
• Calibration procedures and frequency
• Common faults: fouling, scaling, membrane damage
• Preventive maintenance schedules

Objectives:
• Understand control loops and PID controllers.
• Interpret SCADA and DCS interfaces.
• Set control parameters for polishing processes.
• Respond to alarms and abnormal conditions.

Topics:
• Open vs. closed loop control
• PID controller principles and tuning
• SCADA/DCS overview: HMI, trends, alarms
• Control of flow, pressure, and chemical dosing
• Setpoint adjustments for quality targets
• Alarm management and response procedures
• Manual override and fail-safe modes

Objectives:
• Execute standard start-up and shutdown sequences.
• Verify system integrity before operation.
• Implement lock-out/tag-out (LOTO) procedures.
• Document start-up and shutdown activities.

Topics:
• Pre-start-up checks: valves, pumps, instrumentation
• Step-by-step start-up sequence for filters and membranes
• Normal shutdown and emergency shutdown procedures
• LOTO procedures and permit-to-work systems
• Flushing, cleaning, and preservation during shutdown
• Logging and reporting requirements
• Case studies: start-up/shutdown incidents

Objectives:
• Develop a monitoring schedule based on plant design.
• Collect and analyze process data for performance trends.
• Use statistical tools to identify variability.
• Optimize chemical dosing based on data.

Topics:
• Monitoring parameters: flow, pressure, differential pressure, quality
• Sampling locations and frequency optimization
• Data logging and trend analysis using spreadsheets
• Statistical process control (SPC) basics
• Chemical dosing optimization using data
• Performance indicators: recovery, rejection, specific flux
• Reporting and corrective action plans

Objectives:
• Diagnose common operational problems.
• Apply systematic troubleshooting methodologies.
• Implement corrective actions safely.
• Evaluate root causes and prevent recurrence.

Topics:
• Systematic troubleshooting: fishbone, 5 whys
• Common issues: low flow, high differential pressure, poor quality
• Membrane fouling types and cleaning strategies
• Chemical dosing problems: over/under dosing
• Instrumentation drift and calibration errors
• Emergency response to critical failures
• Case studies and group problem-solving exercises

Objectives:
• Apply advanced control strategies for efficiency.
• Optimize chemical usage and energy consumption.
• Implement feed-forward and cascade control.
• Evaluate plant performance using KPIs.

Topics:
• Feed-forward control for chemical dosing
• Cascade control for flow and pressure
• Energy optimization: pump scheduling, variable speed drives
• Chemical consumption reduction strategies
• Key performance indicators (KPIs): uptime, quality, cost
• Benchmarking against industry standards
• Introduction to model predictive control (MPC)

Objectives:
• Integrate all plant operations for consistent quality.
• Ensure compliance with SANS 241 and other regulations.
• Prepare for audits and reporting.
• Demonstrate competence through practical assessment.

Topics:
• Integrated plant operation: from intake to final product
• Regulatory compliance: SANS 241, DWAF guidelines
• Audit preparation: documentation, records, procedures
• Environmental management: waste streams, brine disposal
• Practical assessment: start-up, monitoring, troubleshooting
• Review of key concepts and Q&A
• Course evaluation and certification