NZQA registered unit standard
21800 version 2
Page 1 of 4
Title
Operate a lactose evaporation, crystallisation and decanting process
in a dairy processing operation
Level
4
Purpose
Credits
5
This unit standard is for people carrying out milk product
processing in a dairy processing operation.
People credited with this unit standard are able to: and
demonstrate knowledge of the evaporation, crystallisation and
decanting process; prepare the evaporation, crystallisation and
decanting process for operation; and operate and monitor the
evaporation, crystallisation and decanting process, in a dairy
processing operation.
Classification
Dairy Processing > Milk Products
Available grade
Achieved
Explanatory notes
1
Legislation
Legislation relevant to this unit standard includes but is not limited to the Animal
Products Act 1999, Health and Safety in Employment Act 1992, and Animal Products
(Dairy) Regulations 2005.
2
Definitions
Control points refer to those key points in a work process which must be monitored
and controlled. This includes food safety (critical), quality and regulatory control
points as well as inspection points
Evaporation, crystallisation and decanting equipment may include but is not limited to
– evaporators, crystallisation tanks, decanting plant, driers, and pumping systems.
Materials – lactose and additives or other agents as required, consistent with the
provisions of the Joint Australian and New Zealand Food Standards and other
organisational requirements.
Monitoring the process – the use of production data such as performance control
charts.
Organisational requirements – instructions to staff on policies and procedures which
are documented in memo, electronic or manual format and are available in the
workplace. These include but are not limited to site-specific and company standard
operating procedures, food safety and quality management requirements.
Workplace information– Standard Operating Procedures (SOPs), specifications,
production schedules and batch and/or recipe instructions.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3
21800 version 2
Page 2 of 4
This unit standard must be assessed in a realistic workplace environment. The
candidate must be under realistic time pressures and use relevant commercial
equipment.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of the lactose evaporation, crystallisation and decanting process
in a dairy processing operation.
Evidence requirements
1.1
The purpose of the lactose evaporation, crystallisation and decanting process
are identified and outlined in terms of the relationships between the milling
process and other related processes.
1.2
The stages and changes which occur during evaporation, crystallisation and
decanting are identified and explained in terms of the effects of process stages
on the end product.
1.3
Materials preparation requirements are identified and explained in terms of the
effect of variation on the process.
1.4
The methods used to evaporate, crystallise, and decant materials are identified
and explained in terms of the variables involved in the process.
Range:
1.5
variables include but are not limited to – plant specifications, raw
materials, product end use.
Methods of monitoring control points, maintaining control of the evaporation,
crystallisation and decanting process are identified and outlined in terms of the
causes of variation and corrective action required.
Range:
methods include but are not limited to – process specifications,
procedures, operating parameters, equipment and instrumentation
components, materials and services, sampling and testing,
recording requirements.
1.6
Shut-down, cleaning and sanitation requirements are identified and explained in
terms of the changeover process and the different types of shutdowns.
1.7
Safety issues related to the evaporation, crystallisation and decanting process
are identified and outlined in terms of organisational requirements.
Range:
safety issues include but are not limited to – health and safety
hazards and controls, lockout and tag procedures, environmental
protection and controls.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
21800 version 2
Page 3 of 4
Outcome 2
Prepare to operate a lactose evaporation, crystallisation and decanting process in a dairy
processing operation.
Evidence requirements
2.1
Workplace information is accessed to identify production requirements for
evaporation, crystallisation and decanting in accordance with organisational
requirements.
2.2
Materials and services necessary to the lactose evaporation, crystallisation and
decanting process are confirmed and available to meet production
requirements.
2.3
Evaporation, crystallisation and decanting equipment is checked to confirm
status, condition and readiness for use in accordance with organisational
requirements.
2.4
The evaporation, crystallisation and decanting process is set to meet production
outputs in accordance with organisational requirements.
Outcome 3
Operate and monitor a lactose evaporation, crystallisation and decanting process in a
dairy processing operation.
Evidence requirements
3.1
The lactose evaporation, crystallisation and decanting process is started up in
accordance with organisational requirements.
3.2
Lactose evaporation, crystallisation and decanting equipment, product and
control points are monitored to confirm that they meet production requirements.
Range
monitoring may include but is not limited to – monitoring control
points and parameters, adjusting operating parameters, plant
checks, identifying sampling and testing requirements, taking
samples, handling samples, dispatch of samples, conducting tests.
3.3
Any out-of-specification product, process and equipment performance is
identified, rectified and/or reported in accordance with organisational
requirements.
3.4
Lactose evaporation, crystallisation and decanting equipment is cleaned and
sanitised in accordance with organisational requirements.
3.5
Waste is collected, treated and disposed of or stored for recycling in
accordance with organisational requirements.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
21800 version 2
Page 4 of 4
3.6
Workplace information is recorded in accordance with organisational
requirements.
3.7
Lactose evaporation, crystallisation and decanting equipment is shut down in
accordance with organisational requirements.
shutdown includes but is not limited to – putting plant on standby,
routine, emergency situation.
Range
Planned review date
31 December 2020
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
27 July 2005
31 December 2016
Review
2
16 July 2015
N/A
Consent and Moderation Requirements (CMR) reference
0022
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 the Primary Industry Training Organisation standards@primaryito.ac.nz if
you wish to suggest changes to the content of this unit standard.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016