aquaculture scoop may 2013 -

Issue 2 May 2013

ISSUE 2

of Aquaculture Scoop

quarterly magazine

OPTIMIZATION OF MOISTURECONTENT IN FEED

by Olafur H Jonsson, Intelscan ehf, Iceland

WE TAKE A LOOK AT THEINSTITUTE OF AQUACULTURE,

STIRLING, UK

COOLER MAINTENANCE

by John Doud of Insta Pro International

UPCOMING EVENTS FOR 2013

EDITORIAL

Welcome to our second issue of Aquaculture Scoop.

With articles this issue from Geelen Counterflow, Wenger Manufacturing, IntelScan and Insta-Pro International, we look at cooling, drying and moisture control of aquafeeds.

Our news editor Martin Little visited the Institute of Aquaculture in Stirling, in March and gives us an insight into the institute’s background and some of the research they are involved in now.

Keep up to date with all industry events by visitinghttp://aquaculturedirectory.co.uk/aquaculture-events-2/.

If you have a topic that you would like to see covered, why not get in touch with us.

Published byNisa Media Ltd14 Clarke WayCheltenhamGL50 4AXUnited Kingdom

Editorial ManagerNicky BarnesTel: +44 117 2306494Email: [email protected]

International Marketing ManagerSabby MajorTel: +44 117 2306493Email: [email protected]

News EditorMartin LittleEmail: [email protected]

Designed ByAvalon CreativeEmail: [email protected]: avaloncreative.co.uk

Post Conditioning, Drying and

Cooling of Shrimp Feeds 4

Cooling Technology

For Aquatic Feeds 6

Optimization of MoistureContent in Feed 12

Cooler

Maintenance 14

A look at the Institute of

Aquaculture, Stirling 15

Events 2013 17

CONTENTS

www.aquaculturedirectory.co.uk

Geelen Counterflow, world leading manufacturer of vertical counterflow dryers and coolers, has a complete solution for the process from post-conditioning to

drying and cooling of pelleted shrimp feeds. Shrimp require sinking feed and will not consume disintegrated pellets. As a result, shrimp feed should have a high water stability, otherwise too much feed is lost and water pollution becomes an issue.

One solution to increase water stability has been to add more binders to the product. However, binders are expensive ingredients and for over 20 years the post conditioner is a proven technology to improve starch gelatinization.

Post ConditionerAfter leaving the pellet mill, a high temperature environment is preserved for the pellets. As a result, gelatinization and therefore water stability improves considerably. The need for expensive binders is reduced drastically, resulting in short payback time on your Post Conditioner investment.

Together with major shrimp feed manufacturers, Geelen Counterflow has redesigned their original Post Conditioner, with many important detail improvements for the new MkII version. In order to prevent heat loss of product to ambient, the Post Conditioner consists of a double walled insulated and heat traced housing. The new version has electrical heat tracing

as opposed to the previous steam heating, which enables a more uniform heating of the walls, avoiding not only colder spots but also hot spots that burned product laying against the wall. Insulation is much improved in order to utilize as much as possible of the energy (temperature) which the pellets have received during the pelleting process, reducing energy costs of the post conditioner to a bare minimum. Retention time is determined by height and surface of the Post Conditioner, which is chosen to meet your requirements. For very long retention times a double deck version has been developed.

One important lesson has been that leakages in Post Conditioners should be absolutely avoided. First of all, leaking air will reduce the product temperature and hence the conditioning efficiency. Secondly, leakages cause condensation, resulting in wet pellets and product quality problems, as well as water getting trapped between the walls and insulation. Therefore the MkII Post Conditioner has been fully welded from the inside to ensure it is closed. The insulation material has a closed cell structure, that doesn’t absorb water. All product contact parts are minimum stainless steel AISI 304, whereas many contact parts are even in AISI 316.The robust swivel valve discharge system, driven by hydraulic cylinder and power pack, is gentle to the pellets and can handle even sticky products.For customers wanting to further increase temperatures compared to those at the pellet mill exit, there is live steam injection on top of the product layer inside the Post Conditioner. Because this increases the moisture level of the pellets, the product also requires drying.

Counterflow DryerAs documented by extensive field measurements, Counterfow Dryers no doubt offer the best energy efficiency, which is 20-50% better than horizontal dryers. Counterflow not only is the most efficient way to exchange energy between product and air, but Geelen recirculates as much drying air as possible, as well as uses the warm cooler exhaust air for dryer make up air. Drying air can’t take any short cuts in the Counterflow Dryer. Applying counterflow drying technology therefore saves –ever more expensive- energy, but also reduces the total amount of exhaust air into ambient. In those cases where odour treatment of exhaust air is required, the lower air emissions help reducing the investment for such a system.

Due to the vertical gravity product flow, vertical Counterflow Dryers have very few moving parts. As the Geelen dryer also benefits from its simple and sturdy design, down time and costs for maintenance and repairs are extremely limited. All dryer contact parts are stainless steel AISI 304.

More information:Geelen Counterflow

Peter Schreursweg 386081 NX HaelenThe Netherlands

Tel: +31 475 592 315Web: www.geelencounterflow.com

POST CONDITIONING,DRYING AND COOLINGOF SHRIMP FEEDSby Peter Sillen, Geelen Counterflow, The

Netherlands

Aquaculture Scoop Issue 2

In order to ensure a superior control of the drying process, the Geelen Counterflow Dryer offers control of all main parameters involved. These are retention time, drying air temperature and air volume. Air volume control is possible by frequency converters on the air fans, reducing also electrical energy consumption to a minimum.

Counterflow CoolerAfter the shrimp feeds have been dried, they finally require cooling to maximum 5 degrees C above ambient, in order to be stored safely without the risk of mold or other quality problems.

The Counterflow Cooler uses ambient air for cooling the pellets. To guarantee proper cooling, Geelen Counterflow uses proprietary software, as they also have for dryers, to calculate the right machine size and air volumes. Shrimp feed coolers can be supplied with a hydraulic swivel valve system, identical to those on the Post Conditioner and Counterflow Dryer, making fully remote control possible. The swivel valve system allows the handling of pellets as small as 0.8 mm and does not have cross contamination between different pellets or recipes.Alternatively, for bigger pellets, the original grid type counterflow cooler can be offered, providing lower investment costs, but still with the normal efficiency and reliability that are appreciated by Geelen Counterflow customers worldwide.

Finally, the Geelen Counterflow PLC control system ensures that the Post Conditioner, Dryer and Cooler are easy to use in the most efficient and safe way.


Cooling of aquatic feeds is just as important as the other processes in the system and is the one mostly overlooked. Reviewing briefly, the typical system

for extrusion of aquatic feeds included the raw material preparation area, the extrusion cooker, a drying system, cooling and coating. Looking as these independently gives a better understanding of the needs in the cooling area. The raw materials are selected for the animal to be fed and directly affect the final feed. Is the final product a floating feed, sinking feed, semi-moist feed, vacuum coated with high oil levels, ultra small diameter, medium diameter or in some cases very large in diameter or possibly combinations of all of the above which can be usually made on the same production system? The extrusion system is set up to produce the feed selected. One of the overall goals of extrusion in the case of aquatic feeds is to be very exact and consistent. When making floating feeds all of the pellets should float and vice versa when making sinking feeds, all should sink. Evenness in the production process is an advantage and the moisture level in each pellet is one of the critical parameters in making all the pellets with the same characteristics.

Assuming the extruder has produced a volume of pellets and is doing so continuously the stream is then directed to a continuous dryer. The industry standard for drying is such that the moisture of the pellets is +/- 0.5% with regards to the moisture variance at the end of the dryer. This is another critical parameter. When making aquatic feeds if the moisture varies at this point then the ability of the individual pellets to pick up oil in the coating system also varies. If the moisture in each pellet varies the pellet density varies. The evenness or coefficient of variance, of all aspects of the pellets again is an important factor throughout the process. The same relates to the cooling process.

Coating is required in most cases after drying and can be applied at this point, on hot pellets. Sometimes the pellet is cooled before coating, depends on the amount of coating and the coating process. In general, if partial cooling is preferred before coating then the pellets are slightly cooled, coated and then cooled on a final basis. If the pellets are not going to

be heavily coated then total cooling is possible before a light coating is applied. In summary, coating can be done on hot pellets, semi cooled pellets and completely cooled pellets. This depends on the final product characteristics defined for the product.

The art of cooling is generally accepted as the process where the pellets are reduced in heat until the product will not sweat in a bin or sealed package. Typically this state is achieved if the pellets are below 15 degrees F above ambient temperature. As an example if it is 95 degrees F in the plant then the pellets need to be cooled to within 110 degrees F. For most of the world the same example is 35 degrees C in the plant then the pellets need to be cooled to within 43.3 degrees C or a difference of 8.3 degrees C. This is a critical control point as sweating in the bag causes wet spots and possibly mold development. Having stated this it is recommended to do a test to see if this parameter is sufficient for your area.

What are the style coolers available in the industry? There are 3 basic designs used today and they are counter flow coolers with specialized controlled moving grids or other devices which allow for controlled flow or product discharge. Consult with manufacturers of these designs where triple grids or swivel grid discharge systems are used for additional information. Additional styles are the horizontal moving bed style dryer and the counter flow conical design with no moving parts to create fines on discharge. These two will be covered in additional detail.

Horizontal coolers are usually an extension of a horizontal dryer or a stand-alone system. When used as an extension of an existing dryer the cooler can partially reduce the product temperature prior to external coating application. In these cases an additional cooler is used normally a vertical design for final cooling before packaging. The horizontal design cooler consists of a moving tray on conveyor chains with an option for selection of bed styles. Typically you see perforated holes of different diameters, slotted holes with a variation of dimensions and polyester mesh screens with different openings per linear distances.

More information:Wenger Manufacturing, Inc.

714 Main St.Sabetha, KS 66534

USAWeb: www.wenger.com

COOLING TECHNOLOGYFOR AQUATIC FEEDSby Joe Kearns, Wenger Manufacturing, Inc, USA,

Email: [email protected]


Polyester Overlapping Perforated Horizontal Cooler Bed Conveyor Designs

Hinged Slotted

AQUA NOR 2013InternatIOnaL eXHIBItIOn, 13- 16 august, trOndHeIm, nOrWaY

AQUA NOR - the most important international venue for the aquaculture industry.

FOCUS ON THE FUTURE!Get to know the latest and most advanced aquaculture technology.Meet practitioners from over 50 countries and expand your network.

International conferences and seminars before and during Aqua Nor will focus on new research and opportunities in the aquaculture industry.

Exhibitor, visitor or conference participant?www.nor-fishing.no

The Nor-Fishing FoundationTlf +47 73 56 86 40, Fax +47 73 56 86 41, [email protected]

DanAqua is the exhibition of the future for the fi sh farming sector. It offers producers and other suppliers to the aquaculture sector an outstanding opportunity to come into contact with affl uent guests from all corners of the world.

Make the most of the synergy between DanFish and DanAqua and save on your marketing costs, because now it is no longer necessary to take part in several exhibitions - all customer segments will be coming to Aalborg.

PAY

-OFF

.DK

DanFish is one of the world’s most important exhibitions for equip-ment and services for the fi sheries industry and a unique forum for networking among the international exhibitors and visitors.

In 2011, DanFish welcomed 350 exhibitors from 25 countriesand more than 13,000 visitors, including a number of invited key buyers from all corners of the world.

AQUACULTURE EXHIBITION IN DENMARK

”Don’t worry – it’s so easy to get to Aalborg”

danaqua.net · danfi sh.comBook a stand: Lasse H. Jessen, tel. +45 9935 5509, [email protected] Else Herfort, tel. +45 9935 5518, [email protected]

AALBORG CONGRESS & CULTURE CENTRE9, 10 AND 11 OCTOBER 2013


AQUA NOR 2013InternatIOnaL eXHIBItIOn, 13- 16 august, trOndHeIm, nOrWaY

AQUA NOR - the most important international venue for the aquaculture industry.

FOCUS ON THE FUTURE!Get to know the latest and most advanced aquaculture technology.Meet practitioners from over 50 countries and expand your network.

International conferences and seminars before and during Aqua Nor will focus on new research and opportunities in the aquaculture industry.

Exhibitor, visitor or conference participant?www.nor-fishing.no

The Nor-Fishing FoundationTlf +47 73 56 86 40, Fax +47 73 56 86 41, [email protected]

Aquaculture Scoop 6

DanAqua is the exhibition of the future for the fi sh farming sector. It offers producers and other suppliers to the aquaculture sector an outstanding opportunity to come into contact with affl uent guests from all corners of the world.

Make the most of the synergy between DanFish and DanAqua and save on your marketing costs, because now it is no longer necessary to take part in several exhibitions - all customer segments will be coming to Aalborg.

PAY

-OFF

.DK

DanFish is one of the world’s most important exhibitions for equip-ment and services for the fi sheries industry and a unique forum for networking among the international exhibitors and visitors.

In 2011, DanFish welcomed 350 exhibitors from 25 countriesand more than 13,000 visitors, including a number of invited key buyers from all corners of the world.

AQUACULTURE EXHIBITION IN DENMARK

”Don’t worry – it’s so easy to get to Aalborg”

danaqua.net · danfi sh.comBook a stand: Lasse H. Jessen, tel. +45 9935 5509, [email protected] Else Herfort, tel. +45 9935 5518, [email protected]

AALBORG CONGRESS & CULTURE CENTRE9, 10 AND 11 OCTOBER 2013

On this new blog we will be looking at all aspects of the aquaculture industry, as well as covering news from the fishing industry. Read about events, aquafeed, veterinary news, and recirculation’s systems to open ocean pen farming, looking at new technologies, from around the world.

AquaDirect runs side by side with our online resource Aquaculture Directory, publishing press releases form key companies and key figures in the aquaculture industry, book releases and information from global sources. As well as covering stories from countries and companies developing new aquaculture farms and technologies and feed development to deliver, a sustainable food source for the Global

AquaDirectA new blog from NISA Media Ltd, bringing together news stories from around the world.

Keep up to date with the latest news at http://aquaculturedirect.blogspot.co.uk/

Horizontal coolers as well as dryers have the advantage that the horizontal bed has a very exacting retention time control by controlling the bed speed. Bed speed also allows for control in product depth on the conveyor bed. Air flow can be adjusted to increase or decrease the velocity of the air as it passes through the product. Selection of the bed style allows for various amounts of possible open area selection as well as considerations for the style of product. Mesh screens are used for the small diameter products while larger particle products generally use the steel tray design in either galvanized or stainless steel construction. Polyester mesh can be used for all product sizes while perforated or slotted designs would have product diameter limitations. Small diameter pellets can’t be cooled on a bed with perforations larger than the pellet diameter. In general cooler size is an available square foot or meter area versus volume of product per hour calculation therefore they are constructed in various lengths and widths. The product specifications as well as lab tests assists in defining the width and length requirements of the cooler. Various air velocities are used simply based on the density of the product so as to keep it in place on the product bed. Horizontal coolers are also ideal for use on advanced or complex product shapes and semi-moist products due to possible bridging of the product in vertical designs.

Vertical counter flow cooler designs are excellent for reducing overall operating costs while maintaining consistent product cooling. The Extru-Tech, Inc. design features an internal perforated core and external air plenum cone within the double wall, counter-flow construction. Minimal moving parts, reduces downtime and maintenance cost and these units are ideally suited to a wide variety of products and applications and are exceptional for handling of high fat pet food and aquatic feeds of 2.5 mm diameter and above. Vertical coolers require less floor space than that of horizontal tray cooler designs. The conical cone design offers the initial cooling in the larger area

at the top of the cone where the hottest product enters the system. As the product moves to the discharge the conical area is reduced and the cooling effect increases insuring the final discharge of completely cooled product.


View it online at www.aquaculturedirectory.co.uk

Optimizing moisture content in feed is very important from an economic point of view. It is also very important to maintain correct feed quality. However, too much moisture leads to rapid mould development.

Two factors make this optimization process even more important:

- Agricultural prices have not been higher for the last 40 years. The raw material needs to be utilized efficiently in the feed production process.

- Energy prices are continuing to rise. This mans the running configuration of all equipment including the cooler, needs to be optimized to give the correct moisture content of the final feed.

Correct moisture content of feed before the palletizing will reduce energy usage of the press. However, the added bonus of the energy savings is that quality of pellets in terms of pellet hardness has been found to be improved when pressed at the correct moisture level. If the moisture content before the pellet press is too low the result can be:

- Nutrients are lost as a result of the increased heat in the pellet press

- Moisture content is reduced as a result of increased heat in the pellet press

It is therefore important to compensate for loss of moisture that occurs during grinding and cooling process of the feed production, in order to reach the final target moisture content for three reasons:

- Efficient utilization of raw material- Energy savings- Better pellet quality

New technology makes it easier for the feed milling company to control the process better.

The iScan online moisture sensor is a scanner measuring moisture content instantly, using microwave technology.

The advantage of microwave technology compared with near infrared (NIR) systems is that the microwaves are not affected by other constituents such as fat or protein. This means that many different feeds with various recipes can be measure without complicated calibration work. On the other hand, the advantage of NIR systems is that these systems also detect other constituents such as protein and fat, but they need to be calibrated for each recipe. This can of course be laborious for a typical feed plant with over 200 recipes.

The iScan online moisture sensor monitors continuously the moisture content, temperature and in some cases the density of the feed in real time. The results are shown in the feed mill’s control room.

OPTIMIZATION OF MOISTURE CONTENT IN FEED by Olafur H Jonsson, Intelscan ehf, Iceland

More information: Intelscan ehf, Impra, Keldnaholti 112 Reykjavik Iceland Tel: +354 5229000 Web: www.intelscan.is



-‐ Agricultural prices have not been higher for the last 40 years. The raw material needs to be utilized efficiently in the feed production process.

-‐ Energy prices are continuing to rise. This means the running configuration of all equipment including the cooler, needs to be optimized to give the correct moisture content of the final feed.

Correct moisture content of feed before the pelletizing will reduce energy usage of the press. However, the added bonus of energy savings is that quality of pellets in terms of pellet hardness has been found to be improved when pressed at the correct moisture level. If the moisture content before the pellet press is too low the result can be:

-‐ Nutrients are lost as a result of the increased heat in the pellet press

-‐ Moisture content is reduced as a result of increased heat in the pellet press


-‐ Efficient utilization of raw material -‐ Energy savings -‐ Better pellet quality



The advantage of microwave technology compared with near infrared (NIR) systems is that the microwaves are not affected by other constituents such as fat or protein. This means that many different feeds with various recipes can be measured without complicated calibration work. On the other hand, the advantage of NIR systems is that these systems also detect other constituents such as protein and fat, but they need to be calibrated for each recipe. This can of course be laborious for a typical feed plant with over 200 recipes.

The iScan online moisture sensor monitors continuously the moisture content, temperature and in some cases the density of the feed in real time. The results are shown in the feed mill´s control room.

Fig.1. iScan online moisture sensor. Measures moisture content instantly. Can also measure density if calibrated.

Fig. 2. Software interface from the iScan moisture sensor. Graphs in real time of moisture, temperature and density of feed. Measurement location can be in batch mixer or in cooler.

Optimization of moisture content in feed by Olafur H Jonsson, Intelscan ehf, Iceland

Fig.2. Software interface from the iScan moisture sensor. Graphs in real time of moisture, temperature and density of feed. Measurement location can be in batch mixer or in cooler.

More information: Intelscan ehf, Impra, Keldnaholti 112 Reykjavik Iceland Tel: +354 5229000 Web: www.intelscan.is



-‐ Agricultural prices have not been higher for the last 40 years. The raw material needs to be utilized efficiently in the feed production process.

-‐ Energy prices are continuing to rise. This means the running configuration of all equipment including the cooler, needs to be optimized to give the correct moisture content of the final feed.

Correct moisture content of feed before the pelletizing will reduce energy usage of the press. However, the added bonus of energy savings is that quality of pellets in terms of pellet hardness has been found to be improved when pressed at the correct moisture level. If the moisture content before the pellet press is too low the result can be:

-‐ Nutrients are lost as a result of the increased heat in the pellet press

-‐ Moisture content is reduced as a result of increased heat in the pellet press


-‐ Efficient utilization of raw material -‐ Energy savings -‐ Better pellet quality



The advantage of microwave technology compared with near infrared (NIR) systems is that the microwaves are not affected by other constituents such as fat or protein. This means that many different feeds with various recipes can be measured without complicated calibration work. On the other hand, the advantage of NIR systems is that these systems also detect other constituents such as protein and fat, but they need to be calibrated for each recipe. This can of course be laborious for a typical feed plant with over 200 recipes.

The iScan online moisture sensor monitors continuously the moisture content, temperature and in some cases the density of the feed in real time. The results are shown in the feed mill´s control room.


Fig. 2. Software interface from the iScan moisture sensor. Graphs in real time of moisture, temperature and density of feed. Measurement location can be in batch mixer or in cooler.

Optimization of moisture content in feed by Olafur H Jonsson, Intelscan ehf, Iceland


More information:Intelscan ehf,

Impra, Keldnaholti 112Reykjavik

IcelandTel: +354 5229000

Web: www.intelscan.is


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AQ-2013_Sales_Ad05_prtrdy.pdf 29 February 2012 10:46:07

co-located with

The 4th International Pet & Accessories Exhibition

[email protected]

Ms Meiyu Chou

Ms Stella [email protected]

Mr Yoshihiro Tomori

Ms Iman Tam

[email protected]

6 Shenton Way #15-08DBS Building Tower TwoSingapore 068809

Intelscan has installed several systems to optimize moisture content in feed. A typical system setup is shown above.

In the above setup, the iScan sensor measures the moisture content in the mix under the batch mixer. Th information is sent to Intelscan’s AwuaSmart software. Another iScan sensor placed in the cooler will measure the moisture content of the finished pellets. This finished pellet moisture needs to be as close to the target moisture as possible. In order to reach this correct target moisture, the AquaSmart software will control the dosing of water into the steam mixer/conditioner. The amount of water to add is calculated using a mathematical model. The parameters in the model are:

- Moisture content of the meal in mixer

- Mass throughput in kg/hour in pellet press

- Pellet press energy consumption

- Heat in the steam mixer

- Cooler inlet air

- Moisture content of pellets in cooler

The mathematical model then predicts the exact amount of water to dose into the conditioner in litres/ minute.

Many feed mills use an expander after the conditioner and this helps to retain the added water better in the feed.

Further work is ongoing to optimize pellet moisture content. Intelscan is now working on cooler optimization.

By controlling the fan speed in coolers, it is possible to receive an optimal rate of diffusion in the pellets. It should be possible to control the air flow and the bed height inside the cooler to get the final moisture content on target, as well as having the final temperature out of cooler at ambient level.

Intelscan has installed several systems to optimize moisture content in feed. A typical system setup is shown above.

In the above setup, the iScan sensor measures the moisture content in the mix under the batch mixer. The information is sent to Intelscan’s AquaSmart software. Another iScan sensor placed in the cooler will measure the moisture content of the finished pellets. This finished pellet moisture needs to be as close to the target moisture as possible. In order to reach this correct target moisture, the AquaSmart software will control the dosing of water into the steam mixer/conditioner. The amount of water to add is calculated using a mathematical model. The parameters in the model are:

-‐ Moisture content of the meal in mixer -‐ Mass throughput in kg/hour in pellet press -‐ Pellet press energy consumption -‐ Heat in the steam mixer -‐ Cooler inlet air -‐ Moisture content of pellets in cooler

The mathematical model then predicts the exact amount of water to dose into the conditioner in litres/minute.

Many feed mills use an expander after the conditioner and this helps to retain the added water better in the feed.

Further work is ongoing to optimize pellet moisture content. Intelscan is now working on cooler optimization.

Fig.3. Feed production flow chart. Moisture is measured at beginning and end of the process and water addition into the conditioner is regulated in order to reach the optimum pellet moisture content at exit of cooler.

By controlling the fan speed in coolers, it is possible to receive an optimal rate of diffusion in the pellets. It should be possible to control the air flow and the bed height inside the cooler to get the final moisture content on target, as well as having the final temperature out of cooler at ambient level.

Fig.3. Feed production flow chart. Moisture is measured at beginning and end of the process and water addition into the conditioner is regulated in order to reach the optimum pellet moisture content at exit of cooler.

Thank you!

http://www.intelscan.com


More information:

Cooling of post extruded products is very important, especially as it relates to the production of Full Fat and Expelled Soy.

Acceptable levels of urease and trypsin inhibitors, achieved during extrusion, can be reactivated if the product is sent to storage before it is properly cooled. This will result in poor performance, and possible digestive problems in the animals being fed the product. It can also cause storage problems such as steeping, discoloration and flowability.

Proper cooling can be challenging when outside temperatures are over 100˚F. Industry standards say that product going to storage should be less than 120˚F.

To achieve maximum dwell time in the cooler, you should have a minimum 2 inch drop from the inlet to the outlet of the cooler. This adjustment is made by turning the threaded bolts on the bottom of the cooler legs up and down as needed.

It is important to maintain a minimum 2 inch drop. Less than 2 inches can cause overloading, resulting in stress to the center shaft, gear box and drive motor, or meal leakage at the inlet side of the drum.

In case of a power failure, the cooler should be cleaned out before restarting. Starting the cooler under a load can stress the main shaft to the point of breakage.

Airflow is adjusted with a damper that is located in the plenum, positioned behind the meal inlet. Adjust for as much airflow as possible, without sucking meal out of the cooler drum.

Check the cyclone outlet to see how much meal is being pulled through the air ducting. Because of the oily nature of

the product, meal can stick to and build up on the inside of the whole cooling system.

The inside of the cooler drum should be cleaned at least once a week, as should the fan blades of the fan impeller. The ducting should also be inspected regularly for build-‐up, and always make sure the cyclone outlet is open and free flowing.

Proper cooling is critical to maintain quality in the finished product. So, pay close attention!

Cooler Maintenance by John Doud, Insta Pro International, USA

Cooling of post extruded products is very important, especially as it relates to the production of Full Fat and Expelled Soy.

Acceptable levels of urease and trypsin inhibitors, achieved during extrusion, can be reactivated if the product is sent to storage before it is properly cooled. This will result in poor performance, and possible digestive problems in the animals being fed the product. It can also cause storage problems such as steeping, discoloration and flowability.

Proper cooling can be challenging when outside temperatures are over 100˚F. Industry standards say that product going to storage should be less than 120˚F.

To achieve maximum dwell time in the cooler, you should have a minimum 2 inch drop from the inlet to the outlet of the cooler. This adjustment is made by turning the threaded bolts on the bottom of the cooler legs up and down as needed.

It is important to maintain a minimum 2 inch drop. Less than 2 inches can cause overloading, resulting in stress to the center shaft, gear box and drive motor, or meal leakage at the inlet side of the drum.

In case of a power failure, the cooler should be cleaned out before restarting. Starting the cooler under a load can stress the main shaft to the point of breakage.

Airflow is adjusted with a damper that is located in the plenum, positioned behind the meal inlet. Adjust for as much airflow as possible, without sucking meal out of the cooler drum. Check the cyclone outlet to see how much meal is being pulled through the air ducting. Because of the oily nature of the product, meal can stick to and build up on the inside of the whole cooling system.

The inside of the cooler drum should be cleaned at least once a week, as should the fan blades of the fan impeller. The ducting should also be inspected regularly for build-up, and always make sure the cyclone outlet is open and free flowing. Proper cooling is critical to maintain quality in the finished product. So, pay close attention!

COOLER MAINTENANCEby John Doud, Research & Development Extrusion Specialist, Insta-Pro International, USA, Email: [email protected]

More information:Insta- Pro International

4043 120th StreetUrbandale, IA 50323,

USATel: +1 515 254 1260

Web: www.insta-pro.com


A look at the Institute of Aquaculture, StirlingThe University of Stirling was founded in 1967 by Royal Charter, and was the first genuine new university in Scotland for over 400 years. The University itself is set in stunning grounds, with amazing views. The University is ranked number one in Scotland and eighth in the UK.

The Institute of Aquaculture, founded in 1971, is located in what use to be the main building of the university the Pathfoot building, which has been designated a grade A listed building.

I travelled up to Stirling to visit the Institute of Aquaculture, and met with the Institute’s present director Professor Brian Austin. He told me about some of the history of the Institute and about the external facilities. At present the Institute has 110 members of staff, and over 100 postgraduates students. Professor Austin, told me about the cross disciplinary world class research which covers:

ReproductionGeneticsAquatic Animal health and WelfareNutritionProduction SystemsEnvironmentMarketsSocial and economic impacts

The Institute has three other sites located off the campus, the Marine Environmental Research Laboratory, a purpose built aquaculture research facility and fish holding site, located at Machrihanish in Kintyre on the west coast of Scotland for marine fish.

The Niall Bromage Freshwater Research Unit located at Buckieburn just outside Stirling is a temperate and freshwater research unit and Howietoun Fishery which is operated as a commercial fishery with brown trout hatchery and an ongrowing farm providing fish for restocking and has been since 1881, its one of the oldest fish farms in Scotland.

Stirling has been at the forefront of aquaculture research for many years, as well as being one of the worlds leading aquaculture institutes, they are known worldwide for their research in all the fields of aquaculture.

Working with other institutes from Europe, Japan, China, Thailand, Vietnam, Bangladesh, Pakistan, South America, Mexico, USA and Canada. In Malawi, the University of Stirling along with a Scottish business and research consortium bringing together the Scotland Malawi Business Group are working together to develop small-scale commercial aquaculture.

Professor Austin also talked about research the institute is involved in on the sea lice issue, he told us of a trip he made to Tahiti where he saw fish being cleaned by wrasse in a lagoon. The University using species of wrasse caught by lobster fishermen have bred them for placement into the sea cages along with salmon to actively clean the salmon of sea lice.

Professor Austin showed us a new video that had been produced for the National Museum of Scotland called Wrasse and Salmon – A Winning Combination. The video shows how utilising natural methods could be a major advance for the Salmon industry in Scotland and other parts of the world.

A look at the Institute of Aquaculture, Stirling, UK

The University of Stirling was founded in 1967 by Royal Charter, and was the first genuine new university in Scotland for over 400 years. The University itself is set in stunning grounds, with amazing views. The University is

ranked number one in Scotland and eighth in the UK.

The Institute of Aquaculture, founded in 1971, is located in what use to be the main building of the university the

Pathfoot building, which has been

designated a grade A listed building.

I travelled up to Stirling to visit the Institute of Aquaculture, and met with the Institute’s present director Professor Brian Austin. He told me about some of the history of the Institute and about the external facilities.

At present the Institute has 110 members of staff, and over 100 postgraduates students. Professor Austin, told me about the cross disciplinary world class research which covers:

• Reproduction • Genetics • Aquatic Animal health and Welfare • Nutrition • Production Systems • Environment • Markets • Social and economic impacts •

The Institute has three other sites located off the campus, the Marine Environmental Research Laboratory, a purpose

built aquaculture research facility and fish holding site, located at Machrihanish in Kintyre on the west coast of Scotland for marine fish.



Working with other institutes from Europe, Japan, China, Thailand, Vietnam, Bangladesh, Pakistan, South America, Mexico, USA and Canada. In Malawi, the University of Stirling along with a Scottish business and research consortium bringing together the Scotland Malawi Business Group are working together to develop small-‐scale commercial aquaculture.



!The Pathfoot Building

Professor Brian Austin


Also by breeding the wrasse species themselves they are limiting any impact on wild populations in the future and how using this method of treating sea lice infestation there would be little impact on wild salmon or other species in the area of the sea cages.

The Institute of Aquaculture also has direct involvement within the aquaculture industry and they provide disease, nutritional, analytical and environmental services.

The Institute of Aquaculture Stirling has a proud history, and looks to the future working hand in hand with many countries and institutes in developing the tools of the future for the global aquaculture industry. As well as being a major force within the aquaculture industry, it is also a key teaching and research institute.




Machrihanish In Kintyre

Buckieburn

Howietoun Fishery





Buckieburn

Howietoun Fishery





Buckieburn

Howietoun Fishery

A look at the Institute of Aquaculture, Stirling, UK

The University of Stirling was founded in 1967 by Royal Charter, and was the first genuine new university in Scotland for over 400 years. The University itself is set in stunning grounds, with amazing views. The University is

ranked number one in Scotland and eighth in the UK.

The Institute of Aquaculture, founded in 1971, is located in what use to be the main building of the university the

Pathfoot building, which has been

designated a grade A listed building.

I travelled up to Stirling to visit the Institute of Aquaculture, and met with the Institute’s present director Professor Brian Austin. He told me about some of the history of the Institute and about the external facilities.

At present the Institute has 110 members of staff, and over 100 postgraduates students. Professor Austin, told me about the cross disciplinary world class research which covers:

• Reproduction • Genetics • Aquatic Animal health and Welfare • Nutrition • Production Systems • Environment • Markets • Social and economic impacts •

The Institute has three other sites located off the campus, the Marine Environmental Research Laboratory, a purpose

built aquaculture research facility and fish holding site, located at Machrihanish in Kintyre on the west coast of Scotland for marine fish.



Working with other institutes from Europe, Japan, China, Thailand, Vietnam, Bangladesh, Pakistan, South America, Mexico, USA and Canada. In Malawi, the University of Stirling along with a Scottish business and research consortium bringing together the Scotland Malawi Business Group are working together to develop small-‐scale commercial aquaculture.



!The Pathfoot Building

Professor Brian Austin


30th May-2nd JuneAquarama 2013Suntec City, SingaporeWeb: www.aquarama.com.sg

2nd-5th June4Aquaculture Canada 2013Guelph, Ontario, CanadaWeb: www.aquacultureassociation.ca/

3rd-14th JuneShrimp Pathology Short Course-Disease Diagnosis and Control in Marine Shrimp CultureUniversity of Arizona, Tuscan, Arizona, USAWeb: http://microvet.arizona.edu/research/aquapath/index.htm

5th-7th JuneIndo Livestock 2013 Expo & Forum,Bali, IndonesiaWeb: www.indolivestock.com

21st-25th July7th International Symposium on SturgeonNanamo, BC, CanadaWeb: http://iss7.viu.ca/

9th-12th AugustAquaculture Europe 2013,Trondheim, NorwayEmail: [email protected]

13th-16th AugustaquaNor,Trondheim, NorwayWeb: www.nor-fishing.no

4th-6th SeptemberGenomics in Aquaculture Symposium (GIA 2013)Bodo, NorwayWeb: http://gia2013.org

9th-13th September11th Conference of the Aquaculture Association of Southern Africa Aquaculture Conference 2013Stellenbosch, South AfricaWeb: www.aasa-aqua.co.za/site/conference

16th-20th SeptemberFifth International Conference of the Pan African Fish and Fisheries Association (PAFFA5)

23rd-24th SeptemberAquaculture Forum Bremerhaven 2013-2013, WorkshopIV,Bremerhaven, GermanyEmail: [email protected]

6th-10th OctoberTenth International Symposium on Tilapia in Aquaculture,Jerusalem, IsraelWeb: www.ista10.com

7th-9th OctoberFish & Fish Tech ExhibitionCairo, EgyptWeb:www.facebook.com/groups/globalfishconf/

8th-10th October LAQUA13Latin American & Caribbean Aquaculture 2013,Vilavicencio, ColombiaEmail: [email protected]

9th-11th OctoberDanAquaAalborg Congress & Culture Centre,Aalborg, DenmarkWeb: www.danfish.com / www.danaqua.net

3rd-7th NovemberThe Aquaculture Elsevier Conference,Las Palmas, Gran CanariaEmail: [email protected]

7th-9th NovemberExpo Pesca & Acuiperu,Lima, PeruWeb:www.thaiscorp.com/expopesca_new/site/index

20th-22nd NovemberXII International Symposium on Aquaculture Nutrition,Tabasco, MexicoWeb: http://www.ujat.mx/interioradentro.aspx?

10th-13th DecemberAsian Pacific Aquaculture 2013,Ho Chi Minh City, VietnamWeb: www.was.org

EVENTS 2013May

2013

June

2013

July

2013

October

2013

August

2013

September

2013

November

2013

December

2013


ASIAN PACIFIC AQUACULTURE 2013

DECEMBER 10 -13, 2013SAIGON EXHIBITION CONVENTION CENTRE

HO CHI MINH CITY, VIETNAM

The international aquaculture conference and exhibitionorganized by the Asia Pacific Chapter of the World Aquaculture Society.

Hosted by Ministry of Agriculture and Rural Development (MARD)

For More Information Contact:

Conference ManagerEmail: [email protected]

www.was.org

WAS premier sponsor

Featuring:5th International

Oyster Symposium

Silver sponsor

Gold sponsor

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Aquaculture

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Aquaculture Directory aims to become the number one information portal for the industry, providing news, product releases, new appointments and information on upcoming events as well as full company contact details. All our information is checked and verified before being published, as we pride ourselves on accuracy.

A hard copy of the directory will be available at the end of the year, to reserve your free copy visit www.aquaculturedirectory.co.uk

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aquaculture scoop may 2013 -

Documents

cooling of shrimp feeds

issue of aquaculture

original post conditioner

post conditioner investment

theinstitute of aquaculture

sinking feed

post conditionerafter

high water stability