Human Milk is not simply a food but a complex infant support system
Medicare Colgate Ltd
Post Cross Business Park
Cullompton, Devon, EX15 2BB, England
Tel: +44 (0) 1884 266 666 Fax: +44 (0) 1884 266 333
www.sterifeed.com E-mail: [email protected]
Dear Reader,
We have collated this document to help you with your decision making process when
purchasing an infant feed pasteurizer.
As pasteurization equipment does not come under the FDA umbrella therefore it is vital that your
Bio Medical Engineering and Infection Control Departments vet all equipment prior to
purchasing.
The enclosed information is based on published medical science papers.
We have highlighted the three most important features to consider when pasteurizing:
 Rapid refrigerated cooling with a final milk temperature of 39.2F to ensure the
milk is at a safe temperature to put directly into the fridge or freezer and to
limit the regrowth of bacteria – National Institute of clinical excellence – UK
government - Human Milk Banking guidelines
 Fully submerging bottles during the heating process to ensure the entire bottle
is treated – Human Milk Banking Association of North America guidelines –
HMBANA
 Electronic data verification of the milk temperature to ensure proof of
treatment - Human Milk Banking Association of North America guidelines –
HMBANA - USA
Safe Pasteurization of Mother’s Milk and Special Diets
Contents
Introduction
Why Sterifeed Pasteurizers
How to Choose a Safe Pasteurizer
HMBANA Guidelines – Submerging bottles
HMBANA Guidelines – Data logging of the Milk
Refrigerated Cooling graph
Comparison tap water cooling versus refrigerated cooling
Infant Feed Pasteurization – Line Paper
Three Levels of Safety - Pasteurization Treatment Procedure for the New Millennium
Scientific Report: Affect of Water Level when Pasteurizing Human Milk
Defrost Program/Bottle Warming Program
Data Logging System
Pasteurization Cycle Summary
Data Logger Cycle Profiles
Pasteurizer Position Testing
Pasteurizer Basket Options
Pasteurizer Certification Standards
HMBANA Pasteurizer Installations
Product Leaflets
Pasteurizers Leaflet S90ECO
Pasteurizer Leaflet S180ECO
Pasteurizer Leaflet T30
PP Storage Bottle & Tamper Evident Bottles Leaflet
Printer Leaflet
Medicare Colgate Ltd
Post Cross Business Park
Cullompton, Devon, EX15 2BB, England
Tel: +44 (0) 1884 266 666 Fax: +44 (0) 1884 266 333
www.sterifeed.com
E-mail: [email protected]
Why Sterifeed Pasteurizers
● More than 250 units operating world-wide in over 30 different countries. Half of current
HMBANA milk banks use Sterifeed pasteurizers
● Continuous development since 1977. Sterifeed Pasteurizers use the Holder Method
based on Prof. David J. Baum’s and Co-workers at John Radcliffe’s Hospital invention of
the pasteurizer.
● We pride ourselves on our pasteurizers accuracy, safety and company customer service
and after sales support
● The Baum or Holder method that the Sterifeed pasteurizers are based upon is controlled
heating followed by controlled cooling. Milk temperature pasteurization at 63ºc / 145.4ºF
for 30 minutes followed directly by rapid refrigerated cooling to less than 4ºc / 39.2ºF as
required by all European Guidelines. Rapid refrigerated cooling reduces the window of
opportunity for re-growth of bacteria not destroyed by the pasteurization process.
● Through the use of the Sterifeed ICS Induction Heat Sealer, the whole bottle can be
submerged on the heating cycle as per HMBANA and all major Human Milk Banking
Guidelines.
● Sterifeed pasteurizers monitor Milk Temperature by means of a control bottle probe. It is
the actual milk temperature that is the vital reading on the verification of treatment data,
not the bath temperature.
● Visual monitoring window - every stage of the pasteurization cycle can be observed.
● Temperature can only be adjusted with approval of Infection control, and by strict Milk
Banking protocol.
● Easy to use computerized data logging system for verification of treatment. Complete
proof of treatment and data re-call for the entire heating and cooling cycle should
verification be required. Paper records take up space and are difficult to retrieve.
● On Site training and commissioning 12 months on site parts and labor warranty. Local
distributor for servicing and maintenance.
● Stainless steel construction no rivets, no dirt or water traps.
● CE marking, being the manufacturer’s declaration that the product meets the
requirements of the applicable EC directives and is a worldwide recognized standard
● Energy efficient hot fill, ready to use in approximately ten minutes.
● Uses low cost Sterifeed clear bottles available direct from Sterifeed or from your local
distributor.
● Preferred and approved by Bio Medical Engineering & Infection control Departments.
There are several safety issues when choosing a pasteurizer
Do not take a risk - unless you have extensive Medical Physics
experience, consult your Medical Physics and Infection Control team.
The Safety Issues!
PASTEURIZER WATER LEVELS – Sterifeed pasteurizers have adjustable water levels
Bottles should be fully submerged during the heating process and not submerged during the
rapid cooling process. (Unless Sterifeed foil safety seal bottles are used) HMBANA GUIDELINES 2.a
(please see following pages for guideline reference extract)
The reason why the bottle is required to be submerged is to ensure the entire bottle is treated;
there is a risk that milk droplets adhere to the cap or neck of the bottle as such the entire bottle
is required to be treated.
NB some pasteurizers on the market do not submerge and therefore don’t treat the entire bottle
ELECTRONICALLY RECORDING THE MILK TEMPERATURE - Sterifeed pasteurizers have a bottle probe
and data logger.
It is vital that the Milk temperature as well as the bath temperature is recorded. HMBANA
GUIDELINES 2.f (please see following pages for guideline reference extract)
The water bath temperature does not indicate what the actual milk temperature is, especially
during the cooling process. Proof of treatment for both heating and cooling of the milk is
essential this must be carried out via the use of a control bottle with a probe and data logger. A
data verification system for easy data storage and recall on your PC is vital for your proof of
treatment and professionalism of your milk bank.
NB some pasteurizers on the market do not have a control bottle and do not record the key milk
temperature
RAPID REFRIGERATED COOLING IS ESSENTAIL – Sterifeed pasteurizers have a refrigeration unit to
enable rapid controlled cooling.
All Milk Banking Guidelines recommend rapid cooling of the milk straight after pasteurization.
HMBANA GUIDELINES 3.a (please see following pages for guideline reference extract)
Sterifeed pasteurizers via the use of a refrigeration unit rapidly cool the milk from 63ºC to 25 ºC
(145.4 ºF to 77ºF) in less than 10 minutes. With a final temperature of 4 ºC (39 ºF)
Rapid refrigerated cooling is vital as it limits the re-growth of bacteria in the milk.
NB some pasteurizers on the market do not have a refrigeration unit and therefore without this
cannot meet the rapid cooling requirements
2. Heat Processing
a. Aliquots of milk are processed by completely
submerging the containers in a well-agitated or
shaking water bath preheated to a minimum of
62.5°C / 144.5°F
2. Heat Processing
b. A control bottle containing the same amount of
milk or water as the most filled container of milk in the
batch is fitted with a calibrated thermometer to
register milk temperature during heat processing. The
control bottle follows the same process as the rest of
the batch at all times.
f. Milk temperature and bath temperature are
monitored and recorded.
Comparison between Sterifeed pasteurizers and tap water cooled pasteurizers / water baths
Feature
" STERIFEED"
Refrigerated water
cooled
"Bench Top / Water
bath"
Tap water cooled
Milk Treatment method precise for heating
Yes
Yes
Milk Treatment method precise for cooling
Meets - Baum / Holder Method – The scientific method of automatic
heating followed by refrigerated cooling in one chamber
Yes
No
Yes
No
Method practice proven for more than 35 years
Yes
No
Method "Peer reviewed" in two major studies
Yes
No
Method used in 250 Milk Banks using Sterifeed in 35 different countries
Yes
No
Verifiable milk temperature for entire cycle heating & cooling
Yes
No
Easy access of computerized proof of treatment data
Yes
No
Rapid cooling milk temperature to 77 °F in less than 10 min
Yes
No
Final milk temperature in the same bath of 39.2 °F
Yes
No
Meets all World Milk Banking guidelines
Yes
No
Computerized Data Logging for proof of treatment
Yes
No
Bottles submerged during heating to give 100% treatment of contents
Yes
No
Cooling water recycled for minimum waste
Yes
No
Measure milk temperature not water bath temperature
Milk Temperature controlled by Pasteurizer to ensure no overheating
of the milk
Yes
No
Yes
No
Minimum incoming cold water temperature required (57°F)
No
Yes
High water consumed through running water for cooling
No
Yes
Infant Feed Pasteurisation
A fully referenced evidence based guide to the "practice proven" method for the
Thermal Treatment of Human Milk
By David J. Colgate
S.J.Line Mphil FIBMS CBIOL MIBIOL
Managing risk in feed preparation
In the late 1970's, faced with a growing range of formulae feeds the goal was
to establish an infection control procedure that renders safe donated Human Milk, at the same
time preserving the majority of the immune and nutritional factors.
This paper describes a precise method of treatment that can be repeated at any location.
Risks must be minimised
The established Pasteurisation method raises the temperature of milk in a closed bottle to
62.5°C¹, holding for 30 minutes, then immediately cooled rapidly to > 4°C², within the
Pasteurisation Cycle.
Rapid cooling is described as cooling from 62.5 °C to 25 °C 4 in less than 10 minutes giving a
cooling rate of 3.75 °C per minute 6. If cooling is slow any surviving bacteria will multiply,
therefore the time milk is held between 45oC and 15oC must be minimised.
To achieve rapid cooling a refrigeration plant is essential to remove excess heat. The use of a
cold water supply as a cooling medium is inadequate for two reasons. Firstly the water is
discarded after each flush, therefore an environmentally unfriendly process. In addition the
temperature of the supply water will vary depending on the time of year and the proximity of
the cold water pipe to warm situations.
An air space of about 2 cm should be left below the mouth of each bottle to allow for
expansion during heating and subsequent freezing 6.
Bottles must be submerged during the heating cycle 3 , mandatory in USA 7, to ensure that all
surfaces of the bottle and lid as well as the milk are heat-treated 10.
Bottles should not be submerged during the cooling cycle 5 (unless foil sealed bottles are used)
as a low pressure will be produced in the bottle head space which could cause cooling water
to be drawn into the bottle contaminating the milk.
Comment
The method was developed by the late Professor J David Baum and his co workers at the John
Radcliff Hospital, Oxford in 1977 ¹. Dr J. David Baum personally gave his paper to The American
Academy of Paediatrics at their Annual Conference in New York in 1982.
A comprehensive comparative study at Sorrento Maternity Hospital Birmingham in 1992 ²
became the basis of the first Guideline Published in 1994 by The Royal College of Paediatrics
and Child Health 5.
Almost all studies relating to various aspects of donated Human Milk, particularly if they relate to
the elimination of the H.I.V. will have used the above method of treatment. Users of other
treatment methods cannot draw comfort from these studies.
Precise Equipment
The first patented prototype of an Automatic Pasteuriser with controlled refrigerated cooling
was built in 1977 by the Medical Physics department of John Radcliff Hospital, Oxford ¹. The
patent was licensed to Vickers Medical Ltd. who built the first 20 bottle production model under
the "OXFORD" brand (discontinued in 1982).
In 1978 Colgate Medical Ltd developed in conjunction with Kings College University Hospital 3,
London a semi automatic Pasteuriser based on standard water baths with dip cooled
refrigeration. The Public Health Laboratory was also consulted and their studies found that milk
drops in the cap did not receive the same treatment unless the bottle was submerged during
the heating cycle 3 7.
To precisely achieve the above method a fully automatic Pasteuriser with 42 bottles was
designed by David Colgate in 1980, marketed under the brand "Axicare" and the development
was chosen in 1983 for display by The British Technology Group for the opening of their new
Headquarters by HRH the Prince of Wales.
This model of Pasteuriser built by Scott Weston Ltd was used for the studies by Sorrento
Birmingham in 1992.²
This treatment method is now specified in all other European guidelines. This is apart from Austria
and Italy who specify the final cooling temperature to be 4°C to reduce even further the
window of opportunity for Bacteria re-growth 7 9. In Sweden compliance with the protocol is
mandatory 8.
Technological advances enabled Medicare Colgate Ltd to introduce a compact version with
many additional safety features marketed under the brand "STERIFEED". Namely all water traps
were removed including the secondary cooling tank thus avoiding the need for a sterilisation
cycle.
Verification of Treatment
As with sterilisation equipment, a record of independent verification of satisfactory treatment of
the milk (not the water bath) for the complete cycle (heating & cooling) must be kept for future
reference together with traceability data. This will be required by Infection Control Departments,
Environmental Health Inspectors and a copy for any other Health Care establishment using the
facility must be part of the documentation for the relevant batch. Also Pediatricians prescribing
Donor Human Milk will need to know that their source of supply treats the milk in compliance
with regulatory protocols 6
Typical Human milk temperature curve for satisfactory Pasteurisation
Danger zone
Reducing the bacterial hazard
Rapid cooling provides the following advantages:
• Minimal bacterial growth after pasteurisation
• Minimal toxin production by bacterial growth
• Prevention of spore outgrowth
• Longer milk storage time below 5C due to lower bio burden
• Lower risk to baby
Vegetative bacteria
Bacteria most likely to contaminate breast milk will grow at a temperature between 10C and
50C. Maximum growth will occur at temperatures around 35C. Therefore it is important that
once milk has been pasteurised it is cooled rapidly to 5C to reduce the time it is kept at
temperatures likely to allow growth. Under ideal conditions bacteria can multiply once every
20 minutes, so prolonged storage at temperatures between 10C and 50C could pose a
potential hazard to the baby.
In addition to bacterial growth some bacteria produce toxins, some of which are heat resistant.
Once these toxins are produced they can’t be removed from the milk and will affect the baby.
Bacterial spores
Spore forming bacteria are highly likely to contaminate expressed milk due to their presence on
the skin surface and hands. Spores will survive pasteurisation treatment, but will be heat
shocked. This treatment will promote outgrowth of the spores so they will start to multiply if
allowed to do so. The many spore forming bacteria produce toxins which will affect a baby. To
reduce spore outgrowth and reduce toxin formation processed milk should remain at
temperatures between 10C and 50C for the minimum time possible.
Summary
At the time of preparing this document in 2005 David Baum's method of Pasteurisation has
become standard practice throughout the world with more than 150 installations. The method
has been adopted as a Bench Mark of safety and quality by all reputable equipment
manufactures.
The Human Milk Bank in Umea in the north of Sweden and the one in Athens in the south of
Europe, Pasteurise to exactly the same treatment data (heating & cooling) irrespective of
Ambient temperature and the temperature of their cold water supply.
Users of water baths with a tap water cooling method will find that they are unable to achieve
consistent results, as the incoming water will vary between 10°C and 25 °C (or even higher in the
Summer). Also the influence of how far the water has to travel, the proximity of the hot water
supply and the use of storage tanks will all affect the calorific uptake.
Therefore additional space will be required for Blast Chilling or bespoke refrigeration. The
placement of large volumes of warm milk into a refrigerator already in use may warm the
existing contents and contravene Food Hygiene regulations. Users of ancillary cooling will find it
difficult to provide proof of treatment for the complete cycle.
Conclusion
Purchasers of Pasteurisation equipment must satisfy themselves that it complies with the above
method in all respects and a certificate of conformity obtained. The fact that a manufacturer
may have sold a few is no guarantee. It is the Medical Profession that decide the parametric
requirements not the equipment manufacturer
References
1. Drip Breast milk: its composition, collection, and pasteurisation
(Early Human Development). John Radcliffe Hospital, Oxford Gibbs,J.H.,
Fisher,C., Bhattacharya,S., Goddard,P. and Baum, J.D., 1977
2. Human milk banking at Sorrento Maternity Hospital, Birmingham, S E Balmer,
W A Wharton, Archives of Diseases in Childhood APRIL 1992.
3. Organisation of bank of raw and pasteurised human milk for neonatal intensive care.
S. Williamson, J.H.Hewitt, E. Finucanr, H.R.Gamsu. British Medical Journal, 1978
4. The collection and storage of Human Milk, Department of Health & Social Security
Report on Health and Social Subjects No 22 London 1981
5. Guidelines for the Establishment and Operation of Human Milk Banks in the UK
The Royal College of Paediatrics and Child Health First Edition 1994
6. Guidelines for the Establishment and Operation of Human Milk Banks in the UK
The Royal College of Paediatrics and Child Health Second Edition 1999.
7.USA Guidelines for the Establishment and Operation of a Donor Human Milk Bank.
Human Milk Banking Association of North America written 2003 Revised 2005
8 Sweden THE NATIONAL BOARD OF HEATH AND WELFARE To prevent infection
in the heathcare sector,II 1998:12
9 Italy Linee Guida per la costituzione e l’organizzazione di una Banco del Latte
Umano Donato Societa Italiana di Neonatologia la edizione 2002
10 Affect of Water Level when Pasteurising Human Milk, S.J.Line Mphil FIBMS
CBIOL MIBIOL, Sterilser Consultants Ltd.
11. Donor Breast Milk Banks: the operation of donor milk bank services
N.I.C.E Guidelines – issue dated February 2010
THREE LEVELS OF SAFETY !
1 Pasteurization treatment procedure with hermetic foil seal
Bottles completely immersed during heating and cooling cycle
Foil Safety Seal
Foil Safety Seal
Identical treatment
Identical
Cooling
2 Pasteurization treatment procedure for bottles without foil seal
Bottles completely immersed during
Heating cycle
Water level below cap during
Cooling cycle
Vacuum inlet above water level
Identical treatment
3 Pasteurization treatment procedure abandoned pre 1980
Water level below cap during heating and cooling cycle
NOTE!
"Bottles must be fully
Immersed during the
Heating cycle "(see ref.)
(Williamson S, Hewitt JH, Finucane E, Gamsu HR. Organisation of raw and pasteurized human milk for
neonatal intensive care. British Medical Journal 1978: 1:393- 96 ),
(Public Health Laboratory Service recommendations Hewitt J.H. 1990)
Milk droplets in cap area
receive specified treatment
Milk droplets in cap area
do not receive
specified treatment
Medicare Colgate Ltd, Post Cross Business Park, Cullompton, Devon, EX15 2BB.Tel: 01884 266666
Sterilizer Consultants Ltd
22 Long Park
Woodbury
Devon EX5 1JB
Telephone 01395 232583
Exeter
Email: [email protected]
Our Ref:sf02/02
Report
Affect of Water Level when Pasteurising Human Milk
And Special Diets
By
Stuart J Line
MPhil FIBMS CBIOL MIBIOL
Introduction
The pasteurisation of human milk in milk banks is performed using a water bath. Traditionally the
water level in the bath allowed the bottle to be entirely submerged to allow the process
temperature to be attained both in the milk and headspace of the bottle. The disadvantage
of this process is the reliance of a good watertight seal of the cap and bottle to prevent water
from the bath entering the bottle. An alternative design has now entered the market that uses
a water level just above the level of milk in the bottle. The aim of this paper is to measure the
time/temperature relationship between these two methods and determine if they both allow
reliable pasteurisation of milk and internal bottle surfaces.
Equipment
Water container – Cannon Avent electric baby bottle steriliser with a temperature controller in
line with the heater, able to regulate the water temperature to 63 °C +1/-0 °C and fitted with a
stirrer. IIlustrated in Figure 1.
Bottles - Sterifeed 130ml plastic bottle fitted with a plastic entry port.
Temperature data logger – Chessell 4100G 6 point logger with a set scale 0 – 100 °C Using
0.2mm Cu/Con thermocouple wire,
Milk – UHT low fat cow’s milk.
Protocol
1. The water bath was switched on and allowed to settle to 63 °C with the stirrer in
operation.
2. Thermocouple wires were fitted to the test bottle as listed and one wire free to dip into
the water bath water.
3. The data logger was checked for calibration by placing the all thermocouple wire in the
water together with certificated mercury in glass thermometer. After equilibration of 10
minutes readings were taken of all the probes and the thermometer. The results are listed
in Table 4.
4. The test bottle was filled with milk to the 130ml line and the cap carefully fitted to provide
a good seal.
5. The test bottle was placed into the water bath with the water level to the shoulder for
tests 1 and 2. For test 3 the water level was raised until the cap of the test bottle was
covered.
6. The time was noted when the milk reached 63 °C and 30 minutes was then allowed
before the test ended.
7. On completion of the 30 minutes at 63 °C the test bottle was removed from the heated
bath to cool.
Results
Table 1.
Channel
1
2
3
5
6
Test 1: Water level to top of milk level
Probe site
Inside cap
Head space
Water bath
Shoulder inside bottle
Threaded area inside
bottle
Temperature of milk at start: 23.4 °C
Temperature in °C
when milk at 63 °C
54.4
53.6
65.4
51.7
Temperature at end
of pasteurisation °C
54.0
53.5
63.3
50.8
54.0
54.3
Table 2.
Channel
1
2
3
5
6
Test 2: Water level to top of milk level
Probe site
Inside cap
Head space
Water bath
Shoulder inside bottle
Threaded area inside
bottle
Temperature when
milk at 63 °C
54.5
55.8
64.3
54.5
Temperature at end
of pasteurisation °C
56.5
59.2
64.6
57.8
54.5
56.6
Temperature of milk at start: 25.4 °C
Table 3.
Channel
1
2
3
5
6
Test 3: Water level above top of bottle
Probe site
Inside cap
Head space
Water bath
Shoulder inside bottle
Threaded area inside
bottle
Time delay of probe
reaching 63 oC
6 min 20 sec
5 min 28 sec
7 min 28 sec
First probe to 63 oC
5 min 08 sec
Temperature of milk at start: 17.3 °C
Table 4.
Calibration check on thermocouple probes
Temperature of water bath measured using certificated mercury in glass thermometer:
63.3 °C
Temperature reading of probesProbe
Temperature
error
1
2
3
4
5
6
63.2 °C
63.1°C
62.9 °C
63.4 °C
63.0 °C
63.5 °C
- 0.1°C
- 0.2 °C
- 0.4 °C
+ 0.1°C
- 0.3 °C
+ 0.2 °C
Comments
Test 1. Gave a differential of 8.6 °C to 12.2 °C between the milk temperature and areas
around the bottle headspace and walls. Pasteurisation would not be attained in these
areas thus allowing bacterial survival resulting in contamination of the pasteurised milk
during storage.
Test 2. Gave a differential of 5.2 °C to 8.5 °C which also would cause a failure of
pasteurisation. In addition at the end of 30 minutes exposure time at 63 °C the probes in
and on the surface of the bottle headspace did not rise above 59.2 °C. Therefore at no
time during pasteurisation did any of the headspace probes come within 3.8 °C of the
required minimum temperature during tests 1and 2.
Test 3. Illustrated that when the bottle was heated with a depth of water that covered the
cap the slowest probe to reach 63 °C was in the milk. All the probes in the headspace area
were heated to temperature at least 5 minutes longer than the 30 minutes pasteurisation
time.
The tests prove that it is essential to cover the milk bottles with heated water to ensure that
all surfaces coming in contact with the milk are pasteurised to the required standard. Failure
to heat all internal bottle surfaces will result in the survival of contaminating organisms in the
bottle headspace. After pasteurisation these organisms will re-contaminate the milk and
pose a potential hazard to baby consuming the product.
Stuart J Line
Microbiologist
Date: 13 August 2002
The pasteuriser controlled defrost program facilitates with the Data Logger Probe accurate
details of time and temperature of the defrosting process of the bottles.
It is vital that milk is fully defrosted prior to pasteurizing Human Donor Milk.
For S90 & S180 Models Only
Medicare Colgate Ltd
Post Cross Business Park
Cullompton EX15 2ES England
Tel: 0044 (0) 1884 266 666 Fax: 0044 (0) 1884 266 333
[email protected] www.sterifeed.com
The pasteurizer controlled bottle warming program facilitates with the Data Logger Probe
accurate details of time and temperature of the warming process of the bottles.
For S90 & S180 Models Only
Medicare Colgate Ltd
Post Cross Business Park
Cullompton EX15 2ES England
Tel: 0044 (0) 1884 266 666 Fax: 0044 (0) 1884 266 333
[email protected] www.sterifeed.com
INFANT FEED DATA LOGGING SYSTEM
 Accurate proof of treatment that can be accessed from computerised data by
entering the bottle batch number.
 Reading taken every minute- recording the exact temperature of the milk, time
and date.
 Operates remotely, no direct computer link during recording .
 Information downloaded to the software provided to give a permanent record of
satisfactory treatment.
Recent discussions have shown that many Milk Banks have not realized the
importance of “Rapid Cooling” as part of the overall time & temperature profile
as established in published medical papers for the Thermal Treatment of Mothers
Milk (S.Balmer, W.A. Wharton, Human milk banking at Sorrento Maternity Hospital, Birmingham, archives of
Diseases in Childhood APRIL 1992).
A review of papers has indicated that a final temperature of 4 °C is desirable
to prevent the multiplication of heat resistant organisms not destroyed by
pasteurisation (Department of Microbiology, Bristol University)
The Sterifeed data logging system and bottle probe have been fitted as standard
equipment since April 1998 and is now available to all Hospitals involved in the
high quality thermal treatment of infant feeds including special diets and formula
Medicare Colgate Ltd
Post Cross Business Park
Cullompton, Devon, EX15 2BB, England
Tel: +44 (0) 1884 266 666 Fax: +44 (0) 1884 266 333
www.sterifeed.com
E-mail: [email protected]
SPECIFICATION
Comark Data logger
 Temperature Range (-40°C to +125°C) -104 F -/+ 257F
 Computer connection lead with USB cable supplied
Available with: Comark Software
This can be downloaded from
http://www.comarkinstruments.com/software.tpl?dl_file=EVSW_Std.exe . From
there you will be able to download the latest version.
 Bottle Test Probe & Cable cap fitting, fits most bottles
Datalogger Profile
The list below is an example of the list view print out from the Datalogger
This shows the temperatures that the probe in the milk achieves and the time taken
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Date
Time
Temp C Temp F
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
12.24.41
12.25.41
12:26:41
12:27:41
12:28:41
12:29:41
12:30:41
12:31:41
12:32:41
12:33:41
12:34:41
12:35:41
12:36:41
12:37:41
12:38:41
12:39:41
12:40:41
12:41:41
12:42:41
12:43:41
12:44:41
12:45:41
12:46:41
19.577
25.697
32.350
37.091
40.827
43.886
46.438
48.608
50.491
52.162
53.666
55.035
56.307
57.502
58.612
59.465
60.090
60.555
60.964
61.266
61.548
61.767
61.946
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
67.239
78.255
90.229
98.764
105.489
110.995
115.588
119.494
122.884
125.892
128.598
131.063
133.352
135.504
137.501
139.036
140.162
140.999
141.735
142.280
142.786
143.181
143.502
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
2014-04-16
12:47:41
12:48:41
12:49:41
12:50:41
12:51:41
12:52:41
12:53:41
12:54:41
12:55:41
12:56:41
12:57:41
12:58:41
12:59:41
13:00:41
13:01:41
13:02:41
13:03:41
13:04:41
13:05:41
13:06:41
13:07:41
13:08:41
13:09:41
13:10:41
62.113
62.238
62.323
62.431
62.514
62.572
62.606
62.646
62.705
62.739
62.764
62.767
62.770
62.804
62.838
62.851
62.854
62.851
62.841
62.871
62.941
62.991
63.000
63.000
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
143.803 °F
144.028 °F
144.182 °F
144.375 °F
144.525 °F
144.630 °F
144.691 °F
144.763 °F
144.869 °F
144.930 °F
144.975 °F
144.980 °F
144.986 °F
145.047 F
145.109 °F
145.131 °F
145.137 °F
145.131 °F
145.114 °F
145.167 °F
145.293 °F
145.383 °F
145.400 °F
145.400 °F
Datalogger Profile
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
2014-04-16 13:11:41
2014-04-16 13:12:41
2014-04-16 13:13:41
2014-04-16 13:14:41
2014-04-16 13:15:41
2014-04-16 13:16:41
2014-04-16 13:17:41
2014-04-16 13:18:41
2014-04-16 13:19:41
2014-04-16 13:20:41
2014-04-16 13:21:41
2014-04-16 13:22:41
2014-04-16 13:23:41
2014-04-16 13:24:41
2014-04-16 13:25:41
2014-04-16 13:26:41
2014-04-16 13:27:41
2014-04-16 13:28:41
2014-04-16 13:29:41
2014-04-16 13:30:41
2014-04-16 13:31:41
2014-04-16 13:32:41
2014-04-16 13:33:41
2014-04-16 13:34:41
2014-04-16 13:35:41
2014-04-16 13:36:41
2014-04-16 13:37:41
63.000 °C
63.000 °C
62.991 °C
63.000 °C
63.000 °C
63.994 °C
63.000 °C
62.869 °C
62.813 C
62.755 °C
62.677 °C
58.908 °C
55.800 °C
49.500 °C
44.200 °C
39.567 °C
35.382 °C
31.423 °C
28.143 °C
24.917 °C
22.296 °C
20.072 °C
17.814 °C
16.029 °C
14.314 °C
13.068 °C
11.818 °C
145.400 F
145.400 °F
145.383 °F
145.400 °F
145.400 °F
144.389 °F
145.400 °F
145.232 °F
145.237 °F
145.215 °F
145.165 °F
145.064 °F
144.958 °F
121.100 °F
111.560 °F
103.220 °F
95.687 °F
88.561 °F
82.657 °F
76.850 °F
72.132 °F
68.129 °F
64.065 °F
60.852 °F
57.765 °F
55.522 °F
53.272 °F
75
76
77
78
79
80
81
82
83
84
85
86
2014-04-16 13:38:41
2014-04-16 13:39:41
2014-04-16 13:40:41
2014-04-16 13:41:41
2014-04-16 13:42:41
2014-04-16 13:43:41
2014-04-16 13:44:41
2014-04-16 13:45:41
2014-04-16 13:46:41
2014-04-16 13:47.41
2014-04-16 13:48:41
2014-04-16 13:49:41
10.500°C
9.685°C
8.605°C
7.873°C
7.000°C
6.593°C
6.004°C
5.598°C
5.039°C
4.655°C
4.238°C
3.776°C
50.900 °F
49.433 °F
47.489 °F
46.171 °F
44.600 °F
43.867 °F
42.807 °F
42.076 °F
41.070 °F
40.379 °F
39.628 °F
38.796 °F
Datalogger Graph
This graph shows the temperature and time the feed
takes to pasteurise in F (print out from the Datalogger)
S180 Bottle Position Testing
Introduction
The reason for the test is to show that each individual bottle is pasteurised correctly no matter
where the bottle is positioned in the pasteuriser.
Method
Using a calibrated Tinyview 2 data logger & thermistor probe each basket position is tested. They
should each be pasteurised at 63 °C / 145.4 F +/-5°C for a minimum of 30minutes. Rapid cooled
down to 25°C in approximately 10 minutes and down to below 4.0°C / 39.2 F in approximately 60
minutes.
Results
130ml
Result 250ml Bottles
Conclusion:
All positions on both 130ml & 250ml bottles reached 63°C +/- 0.5°C ( 145.4 F ) for a minimum of 30
minutes, cooled down to 25°C in approximately 10minutes, to below 4.0°C ( 39.2 F) in 60minutes.
Report by: Daniel Hall
Date: 05.04.11
Double storey basket loading options for S180
Double storey baskets are for foil seal bottles only
This basket can only accommodate the 4oz (130ml) bottles
Option A
144 Bottles
CAPACITY
36 x
130ml
Bottles
36 x
130ml
Bottles
Left side of the tank
Basket x 2
Option B
192 Bottles
48 x
50ml
Bottles
36 x
130ml
Bottles
Right side of the tank
Basket x 2
48 x
50ml
Bottles
Basket x 2
48 x 50ml
or 36 x
130ml
Bottles
36 x
130ml
Bottles
48 x
50ml
Bottles
48 x
50ml
Bottles
Basket x 2
48 x 50ml
or 36 x
130ml
Bottles
If less than four baskets are being used they need to be placed into
the tank evenly!
Combination basket loading options for S180
A combination basket is suitable for 130ml and 250ml bottles to be placed into the same basket. The basket consists
of 3 removable spacer bars. When the spacer bars are fitted, the basket can be used for 130ml bottles. When the
spacer bars are removed, they can be used for 250ml bottles. Depending on how many bars you remove this gives
you multiple options on how many 130ml bottles and 250ml bottles you want to be placed into the basket
CAPACITY
Option C
72 Bottles
Left side of the tank
18 x
250ml
Basket
Right side of the tank
Right side of the tank
18 x
250ml
Basket
18 x
250ml
Basket
18 x
250ml
Basket
18 x
130ml
Basket
18 x
130ml
Basket
Basket x 4
Option D
72 Bottles
18 x
130ml
Basket
18 x
130ml
Basket
Basket x 4
Sterifeed Pasteurizer Certification Standards
Directive
Description
BS EN 602041:2006+A1:2009
Safety of machinery. Electrical equipment of machines. General
requirements
BS EN 121001:2003+A1:2009
Safety of machinery. Basic concepts, general principles for design.
Basic terminology, methodology
BS EN 61000-2-2
Electromagnetic compatibility (EMC). Environment. Compatibility
levels for low-frequency conducted disturbances and signaling in
public low-voltage power supply systems
BS EN 61000-2-4
Electromagnetic compatibility (EMC). Environment. Compatibility
levels in industrial plants for low-frequency conducted disturbances
2006/95/EC
The Low Voltage Directive
2004/108/EC
The Electromagnetic Compatibility Directive
2006/42/EC
The Machinery Directive
Sterifeed Pasteurizers are CE marked. CE marking is the
manufacturer’s declaration that the product meets the requirements
of the applicable EC directives and is a worldwide recognized
standard.
HMBANA PASTEURISER INSTALLATIONS
USA & CANADA:
British Colombia Women’s Milk Bank – Vancouver - Canada
Indiana Mothers’ Milk Bank – Indianapolis – USA
Bronson Mothers’ Milk Bank – Michigan – USA
Holston Medical Centre – Tennessee – USA
Rogers Hixon Ontario Human Milk Bank – Ontario - Canada
WakeMed Mothers’ Milk Bank and lactation centre – North Carolina – USA
Inova Fairfax Hospital – Virginia – USA
Calgary Mothers’ Milk Bank – Alberta – Canada
Heart of America Mothers’ Milk Bank – Missouri - USA
The King's Daughters Milk Bank – Virginia – USA
Hema Quebec Mothers Milk Bank – Montreal – Canada
Mothers Milk Bank of South Carolina - USA
PUBLISHED BY:
STERIFEED
Medicare Colgate Ltd
Post Cross Business Park
Cullompton, EX15 2BB, England
 +44 (0) 1884 266 666
Email: [email protected]
Fax: +44 (0) 1884 266 333