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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Assess sedimentation and clarification process performance
   • Review existing process performance data.
   • Identify the impact of changing incoming water quality on sedimentation and clarification processes in a range of conditions.
   • Identify any additional sampling and testing required for valid evaluation of current process performance.
2. Investigate sedimentation and clarification assets
   • Review existing fault reports and other plant asset information.
   • Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.
   • Carry out investigations to identify potential deficiencies.
3. Investigate process optimisation
   • Review relevant fault and incident reports and remedial actions taken.
   • Investigate potential changes to operational processes to identify possible optimisation strategies.
4. Plan process optimisation
   • Determine plant configuration and revised operational processes for process optimisation.
   • Plan a trial to test the performance of the determined optimisation options.
   • Compile a report making recommendations on optimisation options.
5. Assess sedimentation and clarification process performance
   • Review existing process performance data.
   • Identify the impact of changing incoming water quality on sedimentation and clarification processes in a range of conditions.
   • Identify any additional sampling and testing required for valid evaluation of current process performance.
6. Investigate sedimentation and clarification assets
   • Review existing fault reports and other plant asset information.
   • Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.
   • Carry out investigations to identify potential deficiencies.
7. Investigate process optimisation
   • Review relevant fault and incident reports and remedial actions taken.
   • Investigate potential changes to operational processes to identify possible optimisation strategies.
8. Plan process optimisation
   • Determine plant configuration and revised operational processes for process optimisation.
   • Plan a trial to test the performance of the determined optimisation options.
   • Compile a report making recommendations on optimisation options.

Performance Evidence

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

conducting investigations and reporting on operational or control system problems

coordinating sedimentation and clarification inspection, sampling and testing

performing calculations to provide data for the analysis and development of options and solutions, including at least one of:

surface loading rate

upflow velocity

detention time

weir loading rate

interpreting a range of complex and technical documents, including at least one of:

regulatory, legislative, licensing and organisational requirements

codes and standards

specifications

organisational policies

articulating complex ideas

analysing problems and recommending appropriate remedial solutions

identifying risks and hazards

reviewing existing sedimentation and clarification process performance with reference to historical data, differences in incoming water quality and plant configuration

identifying data deficiencies and organising additional data collection through appropriate sampling and testing

assessing fault reports and investigating the current operational status of sedimentation and clarification plant components

investigating current and potential chemical addition practices

planning trials to test the performance of the determined sedimentation and clarification optimisation options and compiling recommendation reports

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Knowledge Evidence

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. If not otherwise specified the depth of knowledge demonstrated must be appropriate to the job context of the candidate.

principles that form the basis of sedimentation and clarification processes

types of sedimentation and clarification processes

re-establishing sludge blankets

polymers and weighting agents

principles of sedimentation and clarification system maintenance

system layout

pumping and valving systems

range of appropriate measuring and testing procedures

investigation procedures

risk management principles relating to sedimentation and clarification systems

chemical dosing processes

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