24945 version 1
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Manage, monitor, and optimise solid waste processes, and dispose of
solid waste, in wastewater treatment
Level
5
Credits
5
Purpose
People credited with this unit standard are able to: manage, monitor, and
optimise, sludge and biosolids processes; and dispose of solid waste, 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 19195.
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
1
Definitions
Biosolids – sewage sludges or sewage sludges mixed with other materials that have
been treated and/or stabilised to the extent that they can be safely returned to the
environment.
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.
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
24945 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.
Sludge – wastewater solids from separation processes including scum.
Wastewater includes stormwater and sewage systems.
2
Reference
New Zealand Water and Wastes Association, Guidelines for the safe application of
biosolids to land in New Zealand. August 2003. ISBN 1-877134-43-0.
Elements and performance criteria
Element 1
Manage sludge and biosolids processes in wastewater treatment.
Performance criteria
1.1
The sludge and biosolids process is optimised in terms of moisture content in
accordance with organisational procedures.
1.2
The sludge and biosolids content is managed in terms of disposal options and
operation flow in accordance with organisational procedures.
Element 2
Monitor sludge and biosolids processes in wastewater treatment.
Performance criteria
2.1
Samples are taken for analysis in accordance with sludge and biosolids
processes and organisational requirements.
2.2
Data is collected and interpreted in accordance with sludge and biosolids
processes and organisational requirements.
Range
heavy metals, micro-organisms.
Element 3
Optimise sludge and biosolids processes in wastewater treatment.
Performance criteria
3.1
The sludge and biosolids process variables and operating factors are adjusted
in accordance with the results of monitoring.
3.2
The critical points in processes are managed in accordance with organisational
procedures.
 New Zealand Qualifications Authority 2016
24945 version 1
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Element 4
Dispose of solid waste in wastewater treatment.
Performance criteria
4.1
Solid waste disposal is 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