Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

  1. Plan and prepare for work
  2. Operate and control process
  3. Complete documentation
  4. Plan and prepare for work
  5. Operate and control process
  6. Complete documentation

Performance Evidence

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

identifying reporting faults

completing logs

performing process calculations including:

recycle ratio

hydraulic loading rate

preparing and applying chemical dosing

monitoring test results and processes

conducting routine plant inspections

taking samples, adjusting dosing and performing basic tests, including at least one of:

pH

flotation tests

colour

turbidity

solids

jar testing

making basic process adjustments according to instructions, including at least one of:

saturator pressure

water level and flow rate


Knowledge Evidence

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.

features and components of dissolved air flotation systems, including:

valves

recycle pumps

compressor

saturator

float removal mechanism

dispersion valves

cutting sprays

making basic process adjustments according to instructions, including:

air loading

recycle flow rates

saturated pressure

detention time

float removal frequency

intended plant configuration

water quality impacts or mixed liquor characteristics, including:

turbidity

colour

presence of algae

temperature

suspended solids

types of dissolved air flotation processes, including:

dissolved air flotation

dissolved air flotation filtration (DAFF)

dissolved air flotation sludge thickening

range of appropriate measuring and testing procedures, including:

turbidity

true colour

float solids content

chemicals used for coagulation and flocculation or thickening

theory of process operations, including:

dissolved air flotation/clarification

dissolved air flotation/filtration

dissolved air flotation/sludge thickening

Candidate should demonstrate basic knowledge of all processes listed in Range of Conditions.