NWP345B – Monitor, operate and control water treatment processes
Tasks
Pre-treatment processes
Chemical dosing processes
Solids separation processes
Disinfection and post-treatment
What to do now
1.
Apply what you have learned in a workplace activity or project.
2.
Have your instructor review your work.
3.
4.
Your instructor will sign this sheet when you have successfully completed the task.
Ask your instructor if you need to submit this sheet as evidence of your learning.
When you close the document you will be prompted to save your changes. Save the document to your computer hard
drive or a removable storage device such as a USB drive.
When finished, print it and keep it with the other forms and records. You may be required to submit this document as
part of your evidence of learning for this task. Please check with your instructor or team leader.
Suggested projects
Suggested project 1
Research how your plant has been designed. What assumptions were made with respect to:
• key treatment processes components
• type of water treated
• fixed components
– chemicals used
– tank volumes
– optimum flow rates
What happens if water characteristics change? How flexible are the treatment processes to changes in source
water characteristics? What other changes could impact on water treatment processes? What strategies are in
place to deal with changes?
Suggested project 2
A plant using DAFF filtration is developing mud balls in the filters and this is impacting on the efficiency of the
treatment processes.
Research how a DAFF plant works. What causes mud balls and how can they by fixed / or avoided.
Suggested project 3
If the coagulation and flocculation processes are not working effectively and turbidity is high through the
sedimentation tanks. How will this extra load impact on the filtration process?
Describe how you would investigate the treatment processes with respect to:
 source water,
 coagulation and flocculation processes,
 sedimentation process,
 filtration process,
Workplace project
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
impact on clarified water quality.
Suggested project 4
Consumers are consistently complaining of taste and odour problems in their water. What effect would
connecting GAC (granulated activated carbon) to the post-treatment processes have? What are the advantages
and disadvantages of this form of post-treatment?
Suggested project 5
There is post-flocculation in your storage tanks. What can cause post-flocculation.
In your answer consider:
 pH,
 residual metals,
 oxidisation of metals,
 excess coagulant.
Describe how you would investigate post-flocculation.
Workplace activities and projects
List the activities and projects you are doing that relate to this unit. Discuss them with your lecturer. Your
lecturer will tell you what to submit as evidence of your learning.
Sign off:
Competency achieved
My name:
My instructor:
Instructor’s signature:
Workplace project
Date:
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