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Evidence Guide: NWPTRT084 - Assess and improve activated sludge and nutrient removal processes

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!

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NWPTRT084 - Assess and improve activated sludge and nutrient removal processes

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

Assess process

  1. Review existing process performance data.
  2. Review existing operational processes with reference to manufacturer and plant designer specifications.
  3. Identify the impact of influent quality on treatment process.
  4. Identify additional sampling and testing required for valid evaluation of current process performance.
  5. Review existing fault reports and other relevant plant asset information.
  6. Investigate the operational status of plant components.
Review existing process performance data.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Review existing operational processes with reference to manufacturer and plant designer specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify the impact of influent quality on treatment process.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Review existing fault reports and other relevant plant asset information.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate the operational status of plant components.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Improve process

  1. Investigate the cause of effluent quality issues.
  2. Investigate the operational status of the wastewater treatment process.
  3. Assess the effectiveness of process control strategies.
  4. Identify treatment process conditions for optimising the growth of beneficial microorganisms.
Investigate the cause of effluent quality issues.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate the operational status of the wastewater treatment process.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess the effectiveness of process control strategies.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify treatment process conditions for optimising the growth of beneficial microorganisms.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Report on process

  1. Compile report on current status.
  2. Make recommendations on optimisation options.
Compile report on current status.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Make recommendations on optimisation options.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess process

  1. Review existing process performance data.
  2. Review existing operational processes with reference to manufacturer and plant designer specifications.
  3. Identify the impact of influent quality on treatment process.
  4. Identify additional sampling and testing required for valid evaluation of current process performance.
  5. Review existing fault reports and other relevant plant asset information.
  6. Investigate the operational status of plant components.
Review existing process performance data.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Review existing operational processes with reference to manufacturer and plant designer specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify the impact of influent quality on treatment process.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Review existing fault reports and other relevant plant asset information.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate the operational status of plant components.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Improve process

  1. Investigate the cause of effluent quality issues.
  2. Investigate the operational status of the wastewater treatment process.
  3. Assess the effectiveness of process control strategies.
  4. Identify treatment process conditions for optimising the growth of beneficial microorganisms.
Investigate the cause of effluent quality issues.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate the operational status of the wastewater treatment process.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess the effectiveness of process control strategies.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify treatment process conditions for optimising the growth of beneficial microorganisms.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Report on process

  1. Compile report on current status.
  2. Make recommendations on optimisation options.
Compile report on current status.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Make 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. Assess process

1.1 Review existing process performance data.

1.2 Review existing operational processes with reference to manufacturer and plant designer specifications.

1.3 Identify the impact of influent quality on treatment process.

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

1.5 Review existing fault reports and other relevant plant asset information.

1.6 Investigate the operational status of plant components.

2. Improve process

2.1 Investigate the cause of effluent quality issues.

2.2 Investigate the operational status of the wastewater treatment process.

2.3 Assess the effectiveness of process control strategies.

2.4 Identify treatment process conditions for optimising the growth of beneficial microorganisms.

3. Report on process

3.1 Compile report on current status.

3.2 Make 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. Assess process

1.1 Review existing process performance data.

1.2 Review existing operational processes with reference to manufacturer and plant designer specifications.

1.3 Identify the impact of influent quality on treatment process.

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

1.5 Review existing fault reports and other relevant plant asset information.

1.6 Investigate the operational status of plant components.

2. Improve process

2.1 Investigate the cause of effluent quality issues.

2.2 Investigate the operational status of the wastewater treatment process.

2.3 Assess the effectiveness of process control strategies.

2.4 Identify treatment process conditions for optimising the growth of beneficial microorganisms.

3. Report on process

3.1 Compile report on current status.

3.2 Make recommendations on optimisation options.

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. The candidate must be assessed preparing recommendation reports on at least one process listed in the Range of Conditions. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

identifying wastewater microorganisms

selecting measures to optimise the growth of beneficial microorganisms

identifying a range of wastewater microorganisms, and their general characteristics and types of problems caused

identifying effluent quality and selecting process control strategies to optimise the growth of beneficial microorganisms

preparing reports outlining the optimum treatment for various microorganisms including measures to ensure validity

performing various calculations to provide data for the analysis and development of options and solutions, including at least one of F:M ratio, MCRT

return and wasting rates

preparing and applying chemical dosing as required

reviewing existing activated sludge or BNR treatment process performance with reference to historical data, differences in raw water quality and plant configuration

identifying data deficiencies

assessing fault reports and investigating the current operational status of activated sludge or BNR treatment process plant components

investigating current and potential chemical addition practices

planning trials to test the performance of the determined activated sludge or BNR treatment process optimisation options

identifying the general characteristics of different types of microorganisms

identifying wastewater characteristics that impact on microorganism growth

identifying the problems caused by microorganisms in specific wastewater treatment processes

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.

types, lifecycle, characteristics of wastewater microorganisms

operational problems caused by wastewater microorganisms

effluent quality problems caused by wastewater microorganisms

properties and mode of action of chemical additives

principles that form the basis of activated sludge treatment processes

principles that form the basis of BNR-activated sludge treatment processes, including nitrification and de-nitrification, enhanced biological phosphorous removal

types of activated sludge and BNR-activated sludge treatment processes

activated sludge and BNR microbiology

Range Statement

Activated sludge processes include:

sequencing batch reactors (SBR)

intermittent decant extended aeration (IDEA)

Bathurst Box

oxidation ditches

Nutrient removal processes include:

biological nutrients removal

fermentation

pre-fermenters