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Manage, monitor, and optimise lagoon processes in wastewater
treatment
Level
5
Credits
3
Purpose
People credited with this unit standard are able to manage, monitor, and
optimise, lagoon processes in wastewater treatment.
Subfield
Water Industry
Domain
Wastewater Treatment
Status
Registered
Status date
19 September 2008
Date version published
19 September 2008
Planned review date
31 December 2013
Entry information
Open.
Replacement information
This unit standard replaced unit standard 19194.
Accreditation
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
Critical points – points in a process or in equipment where failure to function correctly can
lead to adverse affects which may affect the treatment process or other processes in the
treatment plant.
Lagoon – an anaerobic or aerobic detention and treatment basin holding one or more
days’ wastewater flow.
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.
 New Zealand Qualifications Authority 2016
24944 version 1
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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.
Wastewater includes stormwater and sewage systems.
Elements and performance criteria
Element 1
Manage lagoon processes in wastewater treatment.
Performance criteria
1.1
Lagoon loading rate and diurnal biological activity are optimised in terms of
detention times and timing of discharge in accordance with organisational
procedures.
1.2
Lagoon performance is managed in terms of flow variations.
1.3
Lagoon performance is managed in terms of sensory observation in accordance
with organisational procedures.
Range
sensory observation – sight, smell;
observation of – lagoon sludge, hydrogen sulphide, ammonia,
frothing.
Element 2
Monitor lagoon processes in wastewater treatment.
Range
includes but is not limited to – indicator organisms, inflow, outflow, Suspended
Solids (SS), Biochemical Oxygen Demand (BOD), Dissolved Oxygen (DO).
Performance criteria
2.1
Samples are taken for analysis in accordance with lagoon processes and
organisational procedures.
2.2
Data is collected and interpreted in accordance with lagoon processes and
organisational procedures.
Element 3
Optimise lagoon processes in wastewater treatment.
Performance criteria
3.1
The lagoon process variables and operating factors are adjusted in accordance
with the results of monitoring.
 New Zealand Qualifications Authority 2016
24944 version 1
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3.2
The critical points in lagoon processes are managed in accordance with
organisational procedures.
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.
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.
 New Zealand Qualifications Authority 2016