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Evidence Guide: NWPTRT011 - Assess and improve chemical dosing process

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

NWPTRT011 - Assess and improve chemical dosing process

What evidence can you provide to prove your understanding of each of the following citeria?

Evaluate chemical addition process performance

  1. Review existing process performance data against relevant organisational and legislative requirements.
  2. Identify the impact of changing raw or influent water quality on chemical addition processes.
  3. Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance.
Review existing process performance data against relevant organisational and legislative requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify the impact of changing raw or influent water quality on chemical addition processes.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate chemical addition plant configuration

  1. Review existing fault reports and other plant asset information.
  2. Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.
  3. Carry out plant configuration investigations to identify potential deficiencies.
Review existing fault reports and other plant asset information.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Carry out plant configuration investigations to identify potential deficiencies.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate chemical options for process optimisation

  1. Review current chemical addition practices with reference to organisational procedures to identify potential deficiencies.
  2. Investigate dosing options for current chemicals.
  3. Identify and investigate new or additional chemicals and related dosing options.
Review current chemical addition practices with reference to organisational procedures to identify potential deficiencies.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate dosing options for current chemicals.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and investigate new or additional chemicals and related dosing options.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Develop and record a plan for process optimisation

  1. Determine plant configuration or chemical options for process optimisation.
  2. Plan a trial to test the performance of the determined optimisation options.
  3. Compile report with recommendations on optimisation options.
Determine plant configuration or chemical options for process optimisation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Plan a trial to test the performance of the determined optimisation options.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compile report with recommendations on optimisation options.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Evaluate chemical addition process performance

  1. Review existing process performance data against relevant organisational and legislative requirements.
  2. Identify the impact of changing raw or influent water quality on chemical addition processes.
  3. Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance.
Review existing process performance data against relevant organisational and legislative requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify the impact of changing raw or influent water quality on chemical addition processes.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate chemical addition plant configuration

  1. Review existing fault reports and other plant asset information.
  2. Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.
  3. Carry out plant configuration investigations to identify potential deficiencies.
Review existing fault reports and other plant asset information.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Carry out plant configuration investigations to identify potential deficiencies.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate chemical options for process optimisation

  1. Review current chemical addition practices with reference to organisational procedures to identify potential deficiencies.
  2. Investigate dosing options for current chemicals.
  3. Identify and investigate new or additional chemicals and related dosing options.
Review current chemical addition practices with reference to organisational procedures to identify potential deficiencies.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate dosing options for current chemicals.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and investigate new or additional chemicals and related dosing options.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Develop and record a plan for process optimisation

  1. Determine plant configuration or chemical options for process optimisation.
  2. Plan a trial to test the performance of the determined optimisation options.
  3. Compile report with recommendations on optimisation options.
Determine plant configuration or chemical options for process optimisation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Plan a trial to test the performance of the determined optimisation options.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compile report with recommendations on optimisation options.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the range of conditions section.

1. Evaluate chemical addition process performance

1.1 Review existing process performance data against relevant organisational and legislative requirements.

1.2 Identify the impact of changing raw or influent water quality on chemical addition processes.

1.3 Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance.

2. Investigate chemical addition plant configuration

2.1 Review existing fault reports and other plant asset information.

2.2 Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.

2.3 Carry out plant configuration investigations to identify potential deficiencies.

3. Investigate chemical options for process optimisation

3.1 Review current chemical addition practices with reference to organisational procedures to identify potential deficiencies.

3.2 Investigate dosing options for current chemicals.

3.3 Identify and investigate new or additional chemicals and related dosing options.

4. Develop and record a plan for process optimisation

4.1 Determine plant configuration or chemical options for process optimisation.

4.2 Plan a trial to test the performance of the determined optimisation options.

4.3 Compile report with recommendations on optimisation options.

Required Skills and Knowledge

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the range of conditions section.

1. Evaluate chemical addition process performance

1.1 Review existing process performance data against relevant organisational and legislative requirements.

1.2 Identify the impact of changing raw or influent water quality on chemical addition processes.

1.3 Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance.

2. Investigate chemical addition plant configuration

2.1 Review existing fault reports and other plant asset information.

2.2 Investigate the operational status of plant components with reference to manufacturer and plant designer specifications.

2.3 Carry out plant configuration investigations to identify potential deficiencies.

3. Investigate chemical options for process optimisation

3.1 Review current chemical addition practices with reference to organisational procedures to identify potential deficiencies.

3.2 Investigate dosing options for current chemicals.

3.3 Identify and investigate new or additional chemicals and related dosing options.

4. Develop and record a plan for process optimisation

4.1 Determine plant configuration or chemical options for process optimisation.

4.2 Plan a trial to test the performance of the determined optimisation options.

4.3 Compile report with recommendations on optimisation options.

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 and control system problems

coordinating sampling and testing including at least one of:

jar testing

flocculation growth

mixing energy

UV absorbance

pH

colour

turbidity

residual inorganic compounds

alkalinity

conductivity

assessing quality of treatment chemicals by conducting a full range of jar tests

performing mathematical calculations to provide data for the analysis and development of options and solutions

investigating chemical dosing

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 and evaluating reports and reference materials

analysing problems and recommending appropriate remedial solutions

identifying and responding to risks and hazards

identifying opportunities for improved water treatment

reviewing existing process performance with reference to historical data, differences in raw water quality and plant configuration including at least one of:

pH

turbidity

colour

presence of algae

temperature

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

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

investigating current and potential chemical addition practices

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

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.

the role of chemical addition in water treatment

the principles of chemical addition, including enhanced coagulation

chemical addition plant and equipment and system layout including:

mixing equipment

streaming current detector

dosing pumps

chemical injection equipment

turbidity meter

particle counter

flow meters

chemical concepts and reactions relevant to chemical addition processes, including pH and alkalinity

range and characteristics of chemicals used in chemical addition processes including:

polyaluminium chloride (PACL)

aluminium sulphate

aluminium chlorohydrate (ACH)

ferric chloride

ferric sulphate

polyDADMAC

polyacrylamide

sulphuric acid

hydrated lime

caustic soda

functions of various chemicals in chemical addition processes

factors influencing the effectiveness of chemicals in chemical addition processes

factors affecting the selection of chemicals in chemical addition processes

range of appropriate measuring and testing procedures

investigation procedures

risk management principles

locating chemical dosing points including at least one of:

mixing or reaction detention times

type of mixer or impeller

customer expectations and requirements

dosing pump capacity and calibration chart including:

detention times

mixing intensity for flash or rapid mixing and flocculation