NZQA registered unit standard
26111 version 2
Page 1 of 3
Title
Describe and explain the role and treatment of microorganisms in
wastewater
Level
5
Credits
Purpose
3
This unit standard is for people who may or intend to analyse
water samples for quality using microbiological techniques in a
laboratory.
People credited with this unit standard are able to describe and
explain: the dynamics of microorganism populations in water;
the processes necessary to produce potable water; and
treatment processes for water.
Classification
Science > Microbiology
Available grade
Achieved
Explanatory notes
1
Water standards are specified in Drinking-water Standards for New Zealand 2005
(Revised 2008) Wellington: Ministry of Health.
http://www.health.govt.nz/publication/drinking-water-standards-new-zealand-2005revised-2008.
2
Glossary
Potable water is water of sufficiently high quality that it can be consumed or used
without risk of immediate or long term harm.
Outcomes and evidence requirements
Outcome 1
Describe and explain the dynamics of microorganism populations in water.
Evidence requirements
1.1
The nutritional requirements of microorganisms found in water are described.
Range
chemolithotrophs, chemoorganotrophs, photolithotrophs,
photoorganotrophs, filamentous bacteria.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.2
26111 version 2
Page 2 of 3
The influences of environmental factors are explained in terms of
microorganism populations in water.
Range
temperature, density of water, pH, pressure, salinity, light, redox
potential.
Outcome 2
Describe and explain the processes necessary to produce potable water.
Evidence requirements
2.1
Suitable water sources are described in terms water standard requirements.
2.2
The effects of treatment processes in the preparation of potable water are
explained in terms of microorganism populations.
Range
sedimentation, coagulation, filtration, disinfection, storage,
reticulation.
Outcome 3
Describe and explain treatment processes for water.
Evidence requirements
3.1
Primary, secondary, and tertiary water treatment processes are described.
3.2
Water treatment processes are explained in terms of microorganism
populations.
Range
anaerobic digestors, activated sludge, trickling filters, oxidation
ponds, wetlands, constructed wetlands, infiltration, irrigation,
disinfection, cesspools, septic tanks.
Replacement information
This unit standard and unit standard 26112 replaced unit
standard 8039.
Planned review date
31 December 2018
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
21 May 2010
N/A
Rollover
2
27 January 2015
N/A
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
26111 version 2
Page 3 of 3
Consent and Moderation Requirements (CMR) reference
0152
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR 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 NZQA National Qualifications Services nqs@nzqa.govt.nz if you wish to
suggest changes to the content of this unit standard.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016