24941 version 1
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Level 5
Credits 4
Purpose People credited with this unit standard are able to manage, monitor, and optimise, separation processes in wastewater treatment.
Subfield Water Industry
Domain
Status
Status date
Date version published
Wastewater Treatment
Registered
19 September 2008
19 September 2008
Planned review date
Entry information
31 December 2013
Open.
Replacement information
Accreditation
This unit standard replaced unit standard 19191.
Evaluation of documentation and visit by NZQA, industry and teaching professional in the same field from another provider.
Standard setting body (SSB) Primary Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference 0179
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
Definitions
Optimise – adjusting plant input variables to make the process as effective as possible to achieve the desired output, taking into account the constraints of cost, human input, effluent quality, and resource consent requirements.
Organisational procedures – instructions to staff, and procedures which are documented in memo or manual format and are available in the workplace. These requirements include but are not limited to
– site specific requirements, manufacturers’ specifications, product quality specifications, and legislative or regulatory requirements.
Separation processes include both settlement and flotation.
Sludge
– wastewater solids from separation processes including scum.
Wastewater includes stormwater and sewage systems.
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New Zealand Qualifications Authority 2020

24941 version 1
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Element 1
Manage separation processes in wastewater treatment.
Performance criteria
1.1 Sludge withdrawal is managed in terms of solids content and organisational procedures.
Range includes but is not limited to – pumping schedules, scraper sequencing.
Element 2
Monitor separation processes in wastewater treatment.
Range includes but is not limited to – inflow, outflow, Biochemical Oxygen Demand
(BOD), Suspended Solids (SS), solids concentration, sludge solid concentration.
Performance criteria
2.1 Samples are taken for analysis in accordance with separation process requirements and organisational procedures.
2.2 Data is collected and interpreted in accordance with separation process requirements and organisational procedures.
Element 3
Optimise separation processes in wastewater treatment.
Performance criteria
3.1 The separation process controls are adjusted in accordance with the results of monitoring.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.
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New Zealand Qualifications Authority 2020

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Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Primary Industry Training Organisation standards@primaryito.ac.nz if you wish to suggest changes to the content of this unit standard.
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New Zealand Qualifications Authority 2020