new dimension in the production of hygienised feed meal
TRANSCRIPT
8/8/2019 New dimension in the production of hygienised feed meal
http://slidepdf.com/reader/full/new-dimension-in-the-production-of-hygienised-feed-meal 1/4
NEXT PAGE
Grain & Feed Milling Technology is published six times a year by Perendale Publishers Ltd of the United Kingdom. All data is published in good faith, based on information received, and while every care is taken to prevent inaccuracies,
the publishers accept no liability for any errors or omissions or for the consequences of action taken on the basis of information published.©Copyright 2010 Perendale Publishers L td. All rights reserved. No par t of this publication may be reproduced in any formor by any means without prior permission of the copyright owner. Printed by Perendale Publishers Ltd. ISSN: 1466-3872
Digital Re-print - November | December 2010New dimension in the production of hygienised feed meal
www.gfmt.co.uk
8/8/2019 New dimension in the production of hygienised feed meal
http://slidepdf.com/reader/full/new-dimension-in-the-production-of-hygienised-feed-meal 2/4
Pathogenic bacteria in feed meal
are a major risk factor for animal
health and performance.
Thermal meal treatment significantly
reduces microorganisms in feed, but requires
a subsequent cooler after the hygienising
section. Difficult to clean, conventional meal
coolers can be a potential source for cross-
and re-contamination.
A new process solution has been devel-
oped by Buhler Group, Switzerland, utilizing
thermopneumatic conveying for drying and
cooling as a smart alternative to meal coolers.
Contaminated raw materialsAgricultural products are a natural source
of microorganisms such as bacteria, yeasts
and molds.
The degree of contamination is subject
to parameters such as type of raw mate-
rial, origin, transport and storage conditions
and the season. Whereas, most of the
microorganisms are harmless, some species
like enterobacteriaceae show pathogenic
potential, with salmonella being the most
common subspecies of enterobacteriaceae
in animal feed.
Infection doses for salmonella are com-
paratively low, with an incubation period of a
few hours to two days, depending on animal
species and age.
Salmonella can cause serious animal dis-
ease like diarrhea, reducing feed digestibility
and conversion, impairing animal growth and
performance.
Hygienising by heat treatmentSensitive to heat, salmonella are usually
killed at temperatures above 55°C.
However, high concentrations of fat, pro-
tein or starch in formulated feed may form a
protective colloid layer and thus increase the
heat resistance of bacteria.
Hence, a hygienising temperature of
about 85°C has become common practice
in the feed industry to ensure that virtually
all pathogenic bacteria are destroyed. The
temperature is achieved by the addition of
steam into the conditioner and retained
for a certain dwell time in the subsequent
retentioner to guarantee a reliable decon-
tamination process.
Recontamination afterhygienising
After the hygienising process, the hot
and moist feed has to be cooled and dried
to prevent recontamination and growth of
microorganisms.
This usually takes place in conventional
meal coolers utilizing the principle of fluid
bed cooling. Ambient air enters the cooler at
the bottom side, flows through t he perfora-
tion and fluidizes the meal.
Even though providing efficient cooling,
New dimension in theproduction of hygienisedfeed meal by Stefan Hoh, Buhler Group, Switzerland
Gain&fd illinG thnlGy14 | november - december 2010
FeatureFeed meal
meal coolers are often described as a ‘five
star hotel’ for microorganisms: The handling
of hot and moist feed meal can cause con-
densation in the meal cooler, with f ree water
being a major growth factor for bacteria
which has resist the hygienising process or
airborne bacteria from the high air volumes
applied.
Furthermore, cross- and re-contamina-
tion can occur due to product residues in
the system, which are difficult to remove and
require tremendous cleaning effort.
Thermal meal treatment
The Buhler Group has developed a new
process solution utilising thermopneumatic
conveying for drying and cooling of hygien-
ised feed meal. The thermal meal treatment
process is divided into the sub-processes of
hygienising and thermopneumatic drying/
cooling.
Hygienising is carried out by the HYMIX
and HYTHERM modules.
In the HYMIX, the compound feed
particles can be heated to a temperature
of 80 to 90 degrees C by the addition
of steam. The heated formulated feed is
then retained in one or optionally two
HYTHERM modules.
This allows retention times between 60
and 240 seconds to be achieved as a func-
tion of the throughput rate. In addition, the
HYTHERM system is characterised by its
very narrow dwell time distribution, thus get-
ting very close to the ‘first in – first out’ prin-
ciple, which ensures reliable hygienisation.
In a second process step, the hygienised
feed enters the Triple Air Control (TAC)
system for drying and cooling. In the first
stage, pre-heated air is applied for drying and
cooling, utilising the effect of evaporation.
Final product temperature is achieved in
the subsequent two pneumatic conveying
lines, utilizing ambient air for cooling.
The optimised concept of HYMIX and
Hytherm ensures low product residues and
easy cleaning.
Thanks to the high air velocities applied,
Gain&fd illinG thnlGy november - december 2010 | 15
Feature Feed meal
SEPARATING
Harlaxton Road, GranthamLincolnshire NG31 7SF, England
Tel: +44 (0)1476 566301
Fax: +44 (0)1476 590145
E-mail: [email protected]
CONVEYING
www.mogensen.co.uk
SIZING
Processing& recycling…
SPREADING
For all your COMPACTING
and other vibratory equipment needs – whether you’re
specifying, purchasing or installing – make sure
it’s a MOGENSEN!
SCREENING
FEEDING
8/8/2019 New dimension in the production of hygienised feed meal
http://slidepdf.com/reader/full/new-dimension-in-the-production-of-hygienised-feed-meal 3/4
ability of the feed. Thermally treated swine
feed may thus have a positive influence on
the animal’s appetite and – according to
feedback Amrein received from its custom-
ers – results in outstanding feed acceptance.
Moreover, thermal meal treatment
improves the water solubility of the
feed. Product lumps in the feed slurry
are effectively prevented, as well as
deposits of high-density particles in the
feed trough.
Last, the heat and steam treatment causes
fines to agglomerate on coarser particles,
which reduces dust generation and improves
flowability. Choke-ups during discharge from
storage bins and silos are greatly reduced
compared to untreated feed meal.
needs or adjusted to feed recipes for other
animal species, e.g. layer and breeder feed.
This is made possible by the following
options: microfiltration of the air for top
sanitation standards; addition of solid and
liquid microingredients; post-mixing applica-
tion for unsurpassed product homogeneity;
and monitoring of the steam quality and/or
of the moisture content.
Improved feedThe pig feed produced by the new
process is characterized by its extremely low
count of microorganisms such as bacteria,
molds, and yeast fungi.
Pathogenic bacteria such as salmonella
are virtually destroyed, which significantly
reduces the incidence and severity of diar-
rhea disorders in the animals.
Besides improving the animals’ health, this
also enhances feed digestibility, which in turn
has a positive impact on the weight increase
of the animals.
The Maillard reaction occurring during the
thermal treatment process creates a bundle
of roast flavours, which improve the palat-
the TAC system is self-cleaning, which pre-
vents product deposits. Cooling by a ther-
mopneumatic conveyor greatly reduces the
risk of cross-contamination and recontami-
nation in comparison to conventional meal
coolers.
Thanks to its flexible design, the new
thermal meal treatment system has a small
installation footprint. This enables the space
available in existing feed production plants to
be utilised in the best possible way.
The system was installed at the Amrein
Futtermühle AG, Switzerland, which pro-
duces hygienised swine feed.
Operation of the new facility is fully
automated and is controlled exclusively
from the control room. This cuts labour
costs and allows just-in-time production.
The new process increases the uptime
of the processing lines thanks to reduced
downtimes when formulations are changed
in comparison with hygienising systems
consisting of pellet mills and conventional
meal coolers.
The new thermal meal treatment system
can be easily tailored to specific customer
More inforMation:
Buhler Group
Uzwil, CH-9240 SWITZERLANDWebsite: www.buhlergroup.com
Gain&fd illinG thnlGy16 | november - december 2010
FeatureFeed meal
www.viv.net
VIVAsia2011
V isit w w w .v i v .net f or mor e inf or mat ion!
March 9 - 11, 2011
Presenting worldwide innovations andnumerous technical best practices
BITEC Bangkok, Thailand
1 1 . 1 1 - -1 1 :
.
L ,
i l i l ,
i i i
l ili . - i i
i il l
l.
i
i i i l l
i i i ,
l , i.
i i l ll
i ll , i i i i l
i i i i -
i i i l .
i i i i l ’ l , i
l i i ili , i i
i i i i i
i l .
ill i i i
l l
l , i i l -
ili i i l .
i ll i
l , i l , i -
i i i .
i ili i ll
i ll l i l
l . i l
ll -i - i i .
i i
i li
i l i
i i i i i i
i i l l ill i l
l l .
l l
il il i i
,: . .
-1 1 . 1 1 - -1 1 :
We manufacture a comprehensive range of quality machinery suitable forall areas of the Grain, Feed and Milling industries.
Using advanced technology the Jiangsu Hualing Machinery Co uses state of theart computer assisted design technologies to build bespoke engineering systems.Working through from conception to completion we also provide lo ng term trainingand back up facilities.
With over 30 years experience we have the knowledge to produce turnkeysolutions for companies and organisations of any size.
www.hualiang.com.cn/english
Tel:+86-515-85315666 • +8613905110028 • Fax:+86-515-85314485 • [email protected]
12 Weiyi Rd, Economy Development District Dongtai,Jiangsu Prov.,China, 224200
Jiangsu Hualiang Machinery Co., Ltd
IndentedCylinder Separator
Rice Selecting Grader(Length Grader)
Conveyor
1 . 1 1 1 1 :
8/8/2019 New dimension in the production of hygienised feed meal
http://slidepdf.com/reader/full/new-dimension-in-the-production-of-hygienised-feed-meal 4/4
PREVIOUS PAGE
www.gfmt.co.uk
LINKS• Seethefullissue
• VisittheGFMTwebsite
• ContacttheGFMTTeam
• SubscribetoGFMTAsubscriptionmagazine for the global flour &feedmillingindustries-first publishedin1891
In this issue:
• ‘Profiling’FloursAndTheir Value
ToEnd Users
• G loba l gr ain&feedmarkets
• Companyprofiles2010/11
November 2010
• Newdimensionintheproductionofhygienisedfeedmeal
• Insect-resistantpackaging:
- Thelast lineof
defense
• Low-costNearInfraredTransmissiongrainanalysersforfarmers
ThisdigitalRe-printispartoftheNovember|December2010editionofGrain&FeedMillingTechnologymagazine.
Contentfromthemagazineisavailabletoviewfree-of-charge,bothasafullonlinemagazineonourwebsite,andas
anarchiveofindividualfeaturesonthedocstocwebsite.
Pleaseclickheretoviewourotherpublicationsonwww.docstoc.com.
Topurchaseapapercopyofthemagazine,ortosubscribetothepapereditionpleasecontact
ourCirculationandSubscriptionsManageronthelinkadove.
INFORMATIONFORADVERTISERS-CLICKHERE
Article reprints
All Grain & Feed Milling Tecchnology feature articles can be re-printed as a 4 or 8 page booklets (these have been used as point of sale materials, promotional materials for shows and exhibitions etc).
If you are interested in getting this article re-printed please contact the GFMT team for more information on - Tel: +44 1242 267707 - Email: [email protected] or visit www.gfmt.co.uk/reprints