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Evidence Guide: NWPTRT051 - Assess and improve treatment for pathogen removal

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

 

NWPTRT051 - Assess and improve treatment for pathogen removal

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

Assess performance of processes to remove microorganisms

  1. Review existing process performance data.
  2. Review existing operational processes with reference to manufacturer and plant designer specifications.
  3. Identify the impact of raw water quality on water treatment effectiveness for microorganism removal.
  4. Review existing fault reports and other relevant plant asset information.
  5. Investigate the operational status of plant components.
  6. Investigate the cause of treated water quality issues relating to microorganisms.
  7. Assess the effectiveness of process control strategies for microorganism removal.
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 raw water quality on water treatment effectiveness for microorganism removal.

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:

 

 

 

 

 

 

 

Investigate the cause of treated water quality issues relating to microorganisms.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assess the effectiveness of process control strategies for microorganism removal.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Improve process performance for removal of microorganisms

  1. Identify treatment process conditions for optimising microorganism removal.
  2. Determine plant configuration and revised operational processes for process optimisation.
  3. Plan a trial to test the performance of the determined optimisation options.
Identify treatment process conditions for optimising microorganism removal.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine plant configuration and revised operational processes for process optimisation.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report on system performance and improvement

  1. Report on the current operational status of the water treatment process.
  2. Report on effective treatment processes and associated sampling and testing procedures to maintain water quality.
  3. Compile a report making recommendations on optimisation options.
Report on the current operational status of the water treatment process.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report on effective treatment processes and associated sampling and testing procedures to maintain water quality.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Compile a report making recommendations on optimisation options.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assess performance of processes to remove microorganisms

  1. Review existing process performance data.
  2. Review existing operational processes with reference to manufacturer and plant designer specifications.
  3. Identify the impact of raw water quality on water treatment effectiveness for microorganism removal.
  4. Review existing fault reports and other relevant plant asset information.
  5. Investigate the operational status of plant components.
  6. Investigate the cause of treated water quality issues relating to microorganisms.
  7. Assess the effectiveness of process control strategies for microorganism removal.
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 raw water quality on water treatment effectiveness for microorganism removal.

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:

 

 

 

 

 

 

 

Investigate the cause of treated water quality issues relating to microorganisms.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assess the effectiveness of process control strategies for microorganism removal.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Improve process performance for removal of microorganisms

  1. Identify treatment process conditions for optimising microorganism removal.
  2. Determine plant configuration and revised operational processes for process optimisation.
  3. Plan a trial to test the performance of the determined optimisation options.
Identify treatment process conditions for optimising microorganism removal.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine plant configuration and revised operational processes for process optimisation.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report on system performance and improvement

  1. Report on the current operational status of the water treatment process.
  2. Report on effective treatment processes and associated sampling and testing procedures to maintain water quality.
  3. Compile a report making recommendations on optimisation options.
Report on the current operational status of the water treatment process.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report on effective treatment processes and associated sampling and testing procedures to maintain water quality.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Compile a report making 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 performance of processes to remove microorganisms

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 raw water quality on water treatment effectiveness for microorganism removal.

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

1.5 Investigate the operational status of plant components.

1.6 Investigate the cause of treated water quality issues relating to microorganisms.

1.7 Assess the effectiveness of process control strategies for microorganism removal.

2. Improve process performance for removal of microorganisms

2.1 Identify treatment process conditions for optimising microorganism removal.

2.2 Determine plant configuration and revised operational processes for process optimisation.

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

3. Report on system performance and improvement

3.1 Report on the current operational status of the water treatment process.

3.2 Report on effective treatment processes and associated sampling and testing procedures to maintain water quality.

3.3 Compile a report making 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 performance of processes to remove microorganisms

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 raw water quality on water treatment effectiveness for microorganism removal.

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

1.5 Investigate the operational status of plant components.

1.6 Investigate the cause of treated water quality issues relating to microorganisms.

1.7 Assess the effectiveness of process control strategies for microorganism removal.

2. Improve process performance for removal of microorganisms

2.1 Identify treatment process conditions for optimising microorganism removal.

2.2 Determine plant configuration and revised operational processes for process optimisation.

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

3. Report on system performance and improvement

3.1 Report on the current operational status of the water treatment process.

3.2 Report on effective treatment processes and associated sampling and testing procedures to maintain water quality.

3.3 Compile a report making recommendations on optimisation options.

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. Candidate must be assessed operating at least one of the processes, treating at least one of the problems, listed in Range of Conditions. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

identifying a range of waterborne microorganisms

analysing general characteristics caused by waterborne microorganisms, including at least one of:

pathogenicity

virulence

resistance to disinfectants

opportunistic infection capability

analysing types of problems caused by waterborne microorganisms, including at least one of:

nuisance problems

taste and odour

filter clogging

colour

corrosion

toxicity problems

pathogenic problems

identifying pathogenic microorganisms and the diseases they cause, including at least one of:

viruses

bacteria

protozoa

algae

cyanobacteria

helminths

assessing and selecting water or re-use treatment processes for physically removing or deactivating pathogenic microorganisms, including at least one of:

filtration

slow sand filter

granular media filters

membrane filters

disinfection:

chlorination

chloramination

UV

chlorine dioxide

ozone

assessing causes of nuisance and toxicity problems, including at least one of:

micro types:

diatoms

sulphur bacteria

cyanobacteria:

Microcystis aeruginosa

Anabaena circinalis

pathogenic microorganisms:

viruses

enterovirus

hepatitis A

hepatitis E

rotavirus

bacteria:

Campylobacter

Salmonella

Escherichia coli

protozoa species:

Giardia

cryptosporidium

Nagleria

helminths, including Ascaris lumbricoides

selecting pre- or post-treatment processes for removing the causes of nuisance and toxicity problems, including at least one of:

micro-straining

algicides

activated carbon

ozone-biologically activated carbon (BAC)

preparing reports on the optimum treatment for a range of microorganisms, including measures to ensure validity

preparing and applying chemical dosing as required

assessing process performance

reviewing existing process barrier performance with reference to historical data, differences in raw water quality and plant configuration

identifying data deficiencies and additional data collection through sampling and testing

assessing fault reports and investigating current operational status of processes for microorganism removal

investigating current and potential chemical addition practices

planning trials to test the performance of the treatment optimisation options for microorganism removal

preparing recommendation reports

applying calculations to determine log removal values for physical barriers and contact time for disinfection

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 waterborne microorganisms, including:

evolutionary development

source

structure

life cycle

growth rates and requirements

nuisance problems caused by waterborne microorganisms

toxicity and pathogenic problems caused by waterborne microorganisms, including:

typhoid

cholera

ascariasis

hepatitis

giardiasis

cryptosporidiosis

gastroenteritis

tuberculosis

relevant legislation, standards and workplace policies and procedures relating directly to the control and treatment of waterborne microorganisms

principles of water or re-use treatment processes

log removal value concept for physical barriers

Ct concept for disinfection

properties and modes of action of disinfectants

properties and modes of action for physical barriers

Range Statement

Treatment processes include:

source water management

pre-treatment processes to address problems associated with waterborne microorganisms

physical treatment processes to remove waterborne microorganisms

disinfection processes to kill or deactivate waterborne microorganisms

Associated problems with microorganisms include:

algal toxins

taste and odour compounds

disinfection by-products

regrowth, nitrification & disinfection failure