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Evidence Guide: NWP406A - Investigate and plan the optimisation of granular media filtration 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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NWP406A - Investigate and plan the optimisation of granular media filtration processes

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

Evaluate granular media filtration process performance.

  1. Review existing process performance data against relevant organisational or legislative requirements.
  2. Review existing operational processes with reference to manufacturers' and plant designers' specifications.
  3. Identify the impact of incoming water quality on granular media filtration processes as required.
  4. Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance.
Review existing process performance data against relevant organisational or legislative requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Review existing operational processes with reference to manufacturers' and plant designers' specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify the impact of incoming water quality on granular media filtration processes as required.

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 granular media filtration plant or equipment operation.

  1. Review existing fault reports and other relevant plant asset information.
  2. Investigate the operational status of plant components with reference to manufacturers' and plant designers' specifications.
Review existing fault reports and other relevant plant asset information.

Completed
Date:

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Investigate the operational status of plant components with reference to manufacturers' and plant designers' specifications.

Completed
Date:

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Investigate the operational options for process optimisation.

  1. Review relevant fault and incident reports and remedial actions taken.
  2. Investigate current media status with reference to manufacturers' or plant designers' specifications.
  3. Investigate potential changesto operational processes to identify possible optimisation strategies.
Review relevant fault and incident reports and remedial actions taken.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate current media status with reference to manufacturers' or plant designers' specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate potential changesto operational processes to identify possible optimisation strategies.

Completed
Date:

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Develop and record a plan for process optimisation.

  1. Determine plant configuration or media options and revised operational procedures for process optimisation.
  2. Plan a trial to test the performance of the determined optimisation options.
  3. Compile a report making recommendations on optimisation options.
Determine plant configuration or media options and revised operational procedures for process optimisation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

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Compile a report making recommendations on optimisation options.

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

The candidate should demonstrate the ability to evaluate and report on system performance and process quality control including:

reviewing existing filtration process performance with reference to historical data, initial specifications and differences in incoming water quality

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

assessing faults and incident reports and investigating the status of filtration plant components and media

investigating potential changes to filtration operational processes to identify possible optimisation strategies

planning trials to test the performance of the determined filtration optimisation options and compiling reports making recommendations.

Context of and specific resources for assessment

Access to the workplace and resources, including:

documentation that should normally be available in a water industry organisation

relevant codes, standards and government regulations.

Where applicable, physical resources should include equipment modified for people with disabilities.

Access must be provided to appropriate learning and assessment support when required.

Assessment processes and techniques must be culturally appropriate, and appropriate to the language and literacy capacity of the candidate and the work being performed.

Validity and sufficiency of evidence requires that:

competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace

where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice

a decision of competence only taken at the point when the assessor has complete confidence in the person's competence over time and in various contexts

all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence

where assessment is for the purpose of recognition (RCC/RPL), the evidence provided will need to be authenticated and show that it represents competency demonstrated over a period of time

assessment can be through simulated project-based activity and must include evidence relating to each of the elements in this unit.

In all cases where practical assessment is used it will be combined with targeted questioning to assess the underpinning knowledge. Questioning will be undertaken in a manner appropriate to the skill levels of the operator and cultural issues that may affect responses to the questions, and will reflect the requirements of the competency and the work being performed.

Required Skills and Knowledge

Required skills:

conduct system investigation and report on operational or control system problems

coordinate filter inspection, sampling and testing

conduct trend analysis for long term filter monitoring

perform calculations to provide data for the analysis and development of options and solutions, such as backwash rates and filtration rates

determine filter run and backwash profiles and times

operate control and communication systems

use safety and personal protective equipment

communicate with colleagues, consultants and suppliers

produce optimisation reports

interpret a range of complex and technical documents, including relevant:

regulatory, legislative, licensing and organisational requirements

codes and standards

specifications

organisational policies

articulate complex ideas clearly

work collaboratively with relevant stakeholders and team members

analyse problems and recommend appropriate remedial solutions

identify risks and hazards

identify opportunities for improved water management

participate in the provision of appropriate information to inform workplace processes

manage work priorities

use information effectively to improve work performance.

Required knowledge:

principles that form the basis of granular media filtration processes

environmental legislation requirements for water quality and environmental protection

types of filters and their range of applications, conditions for use and manufacturers' requirements

backwash principles and optimisation

filter run profiles

the range and performance of filter aids

filter media properties and selection

filter inspection and sampling

principles of filter maintenance, including cleaning filters, double backwashes, surface cleaning, lancing, caustic washing

filter ripening and turbidity breakthrough

pilot filters

system layout

pumping and valving systems

control and communication systems

relevant historical records

range of appropriate measuring and testing procedures

investigation procedures

risk management principles

relevant standards and workplace policies and procedures.

Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Organisational or legislative requirements may include:

organisational performance quality standards

standard operating procedures

quality assurance guidelines

federal, state and local environmental and water quality legislation

occupational health and safety requirements

water quality standards and guidelines.

Processes may include:

slow granular media filters

conventional granular media filters

pressure and gravity granular media filters.

Manufacturers' and plant designers' specifications may include:

filtration rates

backwash rate and time

air scour rate and time

media profile

media depth

blower capacity

filter aid addition

intended plant configuration.

Incoming water quality may include:

turbidity

colour

presence of algae

temperature.

Testing may include:

turbidity

true colour

filter run profile

particle counting

headloss

media expansion rates

solids retention profile.

Plant components may include:

valves

blower

wash water troughs

under drain system

nozzles and air scour components

control systems

filter cell

surface washers

turbidity meter

particle counter.

Media status may include:

regularity of surface

media profile

media depth

media uniformity

solids retention profile

presence of contaminants.

Potential changes to operational processes may include:

backwash rates, times and sequence

filtration rates

air scour rate and time

filter aid addition

storage of offline filters.