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Digital Re-print - May | June 2012 Mould control in grain and feed preservation

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a widespread application, however, this is not an efficient way to tackle the problem as they damage the nutritional quality of feeds. These toxin binders, which usually contain different types of clay minerals, are not that efficient and may even compromise nutrient digestibility. Moreover, mycotoxin contaminated feeds can impair the animals’ health and productivity due to loss of appetite, feed refusal, allergic reactions, reproductive failure, suppression of the immune system and even mortality.

Contamination by moulds and consequently, the production of mycotoxins, can be greatly reduced by using organic acids as inhibitors. Organic acids effectively inhibit the growth of moulds, yeast and bacteria in different types of feedstuffs and prevent recontamination after production of the compound feed. This extends

Moulds are ubiquitous and unavoida-ble contaminants in all animal feeds. Virtually all animal feeds contain

moulds and viable mould spores which continue to pose a threat to grain quality.

Moulds are fungi which are distinguished by the formation of mycelium (a network of filaments or threads), or by spore masses. Conditions that favour moulds include moisture levels higher than 12 percent, warm tempera-tures, the presence of oxygen, and prolonged storage time.

Many moulds are toxigenic and produce mycotoxins, a secondary metabolite created by moulds that is toxic to organisms other than the mould itself. The growth of moulds and produc-tion of mycotoxins by these moulds in feed ingredients can cause significant eco-nomic losses. They consume valuable feed nutrients such as vitamins and amino acids and they convert energy into water and CO

2 and can cause temperature increase as a result of their carbohydrate metabolism (see below)

C6H12O6 + 6 O2 => 6 CO2 + 6 H2O + Heat

Mould growth depletes the nutri-ent density and affects feed palatabil-ity and consequently decreases feed intake. Moulds cause lipid oxidation and pigment deterioration and are detrimental to animal health, perform-ance and reproduction. The most frequently found mycotoxins are afla-toxins and ochratoxin produced by Aspergillus, the latter are also produced by Penicillium and zearalenone and trichothecenes produced by Fusarium moulds.

Toxin binders vs. organic acids

Animal feed is susceptible to mould growth. The microbiological quality of feed is a comparatively unexplored area but is receiving more attention due to the recognition of mycotoxins as a widespread economic threat.

The use of toxin binders in feed is

shelf life, maintains nutritional value, and prevents formation of mycotoxins.

Mould and moistureDevelopment of moulds in feed depends on

the interaction of several factors, including the presence of spores, the availability of nutrients, storage time, temperature and moisture. Water activity, i.e. the presence of free water, is the most important factor in the growth of moulds. Indeed, microbial spoilage of food and feeds occurs at different levels of moisture and the water activity (a

w) concept describes the water available for microbial growth.

Most feed mills optimise or maximise mois-ture levels during feed production to com-pensate for losses that occur during grinding, pelleting and cooling processes. Moreover, a

sufficient moisture level reduces the energy usage during the pelleting process and results in better pellet quality. The drawback of increasing moisture levels is that increasing levels of free water creates ideal condi-tions for rapid mould growth and the development of mycotoxins. Moulds and yeast grow at a

w > 0.75 and aw > 0.85 respectively.

Products that protect feeds against mould growth and at the same time lower the aw are based on calcium or sodium propionate. Propionic acid is reacted with calcium or sodium to produce a salt with high propionic acid level, 76-78 percent depending on the salt form. The acid is completely buffered, has a good solubility, is safe to use and easy to handle. Their efficiency in shelf life extension when used in feeds is dose related and can be easily demonstrated by an in vitro accelerated method, increasing mois-ture content and storage temperature, by measuring the CO

2 production over time. An efficient preservative effect is obtained up to the moment that CO2 production starts to increase (Figure 1).

Grain preservationAnimal feeds generally contain

MOULD CONTROL

in grain and feed preservation

by André Meeusen, application manager and Yvonne van der Horst, technical manager, Kemira ChemSolutions b.v., The Netherlands

Fig 1: Assessing the activity of Kemira Mould Control SP1 (calcium propionate) using a CO2 test on mash

feed. (Kemira ChemSolutions, Tiel, The Netherlands).

Fig 2: Aspergillus niger growth inhibition efficacies of organic acids on ground whole wheat grains.

Grain&feed millinG technoloGy18 | may - June 2012

FEATURE

GFMT12.03.indd 18 22/06/2012 08:49

a widespread application, however, this is not an efficient way to tackle the problem as they damage the nutritional quality of feeds. These toxin binders, which usually contain different types of clay minerals, are not that efficient and may even compromise nutrient digestibility. Moreover, mycotoxin contaminated feeds can impair the animals’ health and productivity due to loss of appetite, feed refusal, allergic reactions, reproductive failure, suppression of the immune system and even mortality.

Contamination by moulds and consequently, the production of mycotoxins, can be greatly reduced by using organic acids as inhibitors. Organic acids effectively inhibit the growth of moulds, yeast and bacteria in different types of feedstuffs and prevent recontamination after production of the compound feed. This extends

Moulds are ubiquitous and unavoida-ble contaminants in all animal feeds. Virtually all animal feeds contain

moulds and viable mould spores which continue to pose a threat to grain quality.

Moulds are fungi which are distinguished by the formation of mycelium (a network of filaments or threads), or by spore masses. Conditions that favour moulds include moisture levels higher than 12 percent, warm tempera-tures, the presence of oxygen, and prolonged storage time.

Many moulds are toxigenic and produce mycotoxins, a secondary metabolite created by moulds that is toxic to organisms other than the mould itself. The growth of moulds and produc-tion of mycotoxins by these moulds in feed ingredients can cause significant eco-nomic losses. They consume valuable feed nutrients such as vitamins and amino acids and they convert energy into water and CO

2 and can cause temperature increase as a result of their carbohydrate metabolism (see below)

C6H12O6 + 6 O2 => 6 CO2 + 6 H2O + Heat

Mould growth depletes the nutri-ent density and affects feed palatabil-ity and consequently decreases feed intake. Moulds cause lipid oxidation and pigment deterioration and are detrimental to animal health, perform-ance and reproduction. The most frequently found mycotoxins are afla-toxins and ochratoxin produced by Aspergillus, the latter are also produced by Penicillium and zearalenone and trichothecenes produced by Fusarium moulds.

Toxin binders vs. organic acids

Animal feed is susceptible to mould growth. The microbiological quality of feed is a comparatively unexplored area but is receiving more attention due to the recognition of mycotoxins as a widespread economic threat.

The use of toxin binders in feed is

shelf life, maintains nutritional value, and prevents formation of mycotoxins.

Mould and moistureDevelopment of moulds in feed depends on

the interaction of several factors, including the presence of spores, the availability of nutrients, storage time, temperature and moisture. Water activity, i.e. the presence of free water, is the most important factor in the growth of moulds. Indeed, microbial spoilage of food and feeds occurs at different levels of moisture and the water activity (a

w) concept describes the water available for microbial growth.

Most feed mills optimise or maximise mois-ture levels during feed production to com-pensate for losses that occur during grinding, pelleting and cooling processes. Moreover, a

sufficient moisture level reduces the energy usage during the pelleting process and results in better pellet quality. The drawback of increasing moisture levels is that increasing levels of free water creates ideal condi-tions for rapid mould growth and the development of mycotoxins. Moulds and yeast grow at a

w > 0.75 and aw > 0.85 respectively.

Products that protect feeds against mould growth and at the same time lower the aw are based on calcium or sodium propionate. Propionic acid is reacted with calcium or sodium to produce a salt with high propionic acid level, 76-78 percent depending on the salt form. The acid is completely buffered, has a good solubility, is safe to use and easy to handle. Their efficiency in shelf life extension when used in feeds is dose related and can be easily demonstrated by an in vitro accelerated method, increasing mois-ture content and storage temperature, by measuring the CO

2 production over time. An efficient preservative effect is obtained up to the moment that CO2 production starts to increase (Figure 1).

Grain preservationAnimal feeds generally contain

MOULD CONTROL

in grain and feed preservation

by André Meeusen, application manager and Yvonne van der Horst, technical manager, Kemira ChemSolutions b.v., The Netherlands

Fig 1: Assessing the activity of Kemira Mould Control SP1 (calcium propionate) using a CO2 test on mash

feed. (Kemira ChemSolutions, Tiel, The Netherlands).

Fig 2: Aspergillus niger growth inhibition efficacies of organic acids on ground whole wheat grains.

Grain&feed millinG technoloGy18 | may - June 2012

FEATURE

GFMT12.03.indd 18 22/06/2012 08:49

Grain handling systems that you can truly rely onCargotec’s land-based Siwertell ship unloaders and loaders are designed to suit each terminal’s specific

requirements. Siwertell systems use unique enclosed screw conveyor technology to ensure that dry bulk cargo

operations are environment-friendly and efficient.

Let the dry bulk handling experts design a custom-made answer to your particular needs.

Siwertell grain ship unloader at Rizhao Port, China

SIWERTELL IS A CARGOTEC BRANDwww.cargotec.com • www.siwertell.com

GFMT12.03.indd 19 22/06/2012 08:49

mould spores which originate from raw materials used. The three genera of moulds - Aspergillus, Penicillium and Fusarium cause most cases of mycotoxin contamination in many grains and their byproducts and in vegetable proteins. Their optimal growth is mostly influenced by tempera-ture and this determines their global presence.

Aspergillus and Penicillium species will grow better in warmer-tropical climates whereas Fusarium moulds prefer cooler temperate cli-mates. Moulds are obligate aerobe and their proliferation can thus be controlled by oxygen free storage, such as silage. They consume carbohydrates and provoke fat hydrolysis leading to nutritionally low quality grains. Organic acids

are known in the feed industry as an effective and affordable tool to control mould growth in grains and their byproducts during transport and storage.

Anaerobic preservation of grains usually applies when moisture is very high, from 25 – 45 percent. Grains are crimped before ensiling with formic acid based products.

Aerobic preservation is usually done with whole grains with moisture content between 15 – 25 percent. Typically, blends of different acids or acids with other active compounds are used, with propionic acid being the principle active component. The level of propionic acid needed under local conditions depends on kernel quality, initial mould counts, storage con-ditions and time.

Straight vs. buffered acidsThe mechanism of inhibition of growth

of moulds by organic acids is generally not considered a pH phenomenon. It is the propi-onate ion or radical (CH3CH3CO0-) that is the active mould inhibiting ingredient in propionic acid, so attempts have been made to use salts

of propionic acid to overcome the odour and corro-sion problems.

To enter into the mould cell, the acids have to pass a double barrier, the cell membrane and the outer cell wall of these moulds. Inside the moulds the organic acids dissoci-ate decreasing the intracellular pH and compromising the cell metabolism. The three-dimensional

structure and the lipophilic character of propi-onic acid seems to play an important role for the acids to pass through this double barrier.

Kemira has developed several mould con-trol products containing appropriately buffered acids avoiding the typical drawbacks of straight acids. The organic acids in the liquid Kemira Mould Control product range are buffered with ammonium or sodium, ensuring reduced corrosivity and volatility and a long lasting pres-ervation effect.

Ammonium buffering has the advantage of delivering a proton H+ supporting a more effective mould inhibitory effect. The inclusion of a lipophilic compound assures a better surface contact with grains and an easier penetration into meals and feeds. It will also improve the water binding capacity of feed materials and lower the water activity of feeds. This extends the shelf life, maintains the nutritional quality, and prevents the formation of mycotoxins in feeds and feedstuffs.

Formic acid based mould inhibitor Traditionally propionic acid is used against

mould and mycotoxin formation. The relative shelf life depends to a great extent on the pro-pionic acid content. Indeed, the lowest survival rates for Fusarium spp. and Aspergillus niger were achieved with the highest actual propionic acid contribution, irrespective of the type of mould inhibitors tested.

As the leading global producer of formic acid-based products for the animal feed industry, Kemira has developed a new liquid mould inhibi-tor for grain preservation based on formic and propionic acid with an excellent ammonium-sodium buffering system to minimise volatility and corrosivity and ensuring proper handling properties. It is activated by lipophilic com-pounds. Formic acid does not have this lipophilic characteristic but it contains the highest antimi-crobial properties as this is the smallest molecule of all the organic acids and has a > 60 percent higher number of active organic radicals per kilogram of pure substance.

The efficacy of such a novel ammonium-sodium buffered formic acid based product (Kemira Mould Control LF1) on reduction of Aspergillus niger in grinded whole wheat grains was assessed in a laboratory study done in the Kemira R&D center in Espoo-

Finland and compared to ammonium buff-ered propionic acid (Kemira Mould Control LP1 NC). Figure 2 shows that the initial inoculation with Aspergillus niger in grains without preservatives resulted in significant growth during the first week. Both Kemira Mould Control LP1 NC and Kemira Mould Control LF1 at 0.2 w/w-%, inhibited growth of Aspergillus niger in grinded whole wheat grains over a 2 weeks period and total kill off was obtained with both products at 0.4 w/w-%.

The same laboratory tests have been repeated in Wessling Laboratories. Also here the inclusion of 0.4 percent with both products showed to be efficient in killing off both types of moulds during a two weeks incubation period. The Fusarium moulds seemed somewhat more sensitive to the formic acid based mould inhibitor with total kill off at seven days already (Table 1).

The efficacy of Kemira Mould Control LF1 was further assessed in a simulated field trial at Wageningen UR, The Netherlands. The trial measured mould and temperature develop-ment of fresh harvested grains during a four month storage period at ambient temperature and results were compared to Kemira Mould Control LP1nc.

The treatment with the formic acid based Kemira Mould Control LF1 at 0.7 percent showed the biggest effect in preventing the temperature to increase. It was significantly (P<0.05) lower than both the positive control (propionic acid based) and negative control. Moreover, results showed that Kemira Mould Control LF1 at 0.4 percent is as effective in inhibiting mould growth and preventing tem-perature increase in freshly harvested grains with high moisture content (17.6%) as the propionic acid based Kemira Mould Control LP1nc. Mould growth was reduced from 5 log platable fungal colonies per gram in the non-treated grains down to 1.34 log/gram and 1.15 log/gram respectively.

This was also confirmed in a field trial in UK, monitored by Aberystwyth University in which freshly harvested wheat with a moisture content of 17.9 percent was rolled and treated with different dosages of the ammonium-sodium buffered formic-propionic acid based product or with the ammonium buffered propionic acid only and stored for eight months in 10 ton bins.

At nine litres per ton of grains, both products allowed easy storage without any temperature increase in the bins during the eight months. Initial mould counts at three weeks showed both products to be effective, compared to an untreated sample.

This makes Kemira Mould Control LF1, a for-mic acid based blend with a novel ammonium – sodium buffering and activated by lipophilic compounds, an interesting alternative to the traditional propionic acid based products, assur-ing the fast killing of any mould that appears on grains and assuring a save and long preservation.

More inforMation:Kemira ChemSolutions b.v.

Email: feed@kemira.com

Table 1: Mould inhibiting and killing-off effect of Propionic acid (Kemira Mould Control LP1) and formic – propionic (Kemira Mould Control LF1) buffered products in highly challenged conditions (Wessling 2011)

TREATMENTS RESULTS

Name %0.day

Mould cfu/g7.day

Mould cfu/g14.day

Mould cfu/g

Positive control: ASPERGILLUS inoculated 3.5∙104 4.7∙105 2.0∙107

Kemira Mould Control LP1 nc 0,4 1.0∙103 <50 <50

Kemira Mould Control LF1 0,4 8.5∙102 <50 <50

Positive control: FUSARIUM inoculated 2.2∙105 3.6∙105 6.4∙106

Kemira Mould Control LP1nc 0,4 2.0∙104 1.0∙102 <50

Kemira Mould Control LF1 0,4 1.0∙102 <50 <50

Negative control <50 <50 <50

Table 2: Mould counts in freshly harvest rolled wheat after three weeks storage with and without treatment (Aberystwyth University)

TreatmentMould count

(cfu/g)

Kemira Mould Control LP1 nc 227

Kemira Mould Control LF1 40

Untreated >1,500,000

Grain&feed millinG technoloGy20 | may - June 2012

FEATURE

GFMT12.03.indd 20 22/06/2012 08:49

mould spores which originate from raw materials used. The three genera of moulds - Aspergillus, Penicillium and Fusarium cause most cases of mycotoxin contamination in many grains and their byproducts and in vegetable proteins. Their optimal growth is mostly influenced by tempera-ture and this determines their global presence.

Aspergillus and Penicillium species will grow better in warmer-tropical climates whereas Fusarium moulds prefer cooler temperate cli-mates. Moulds are obligate aerobe and their proliferation can thus be controlled by oxygen free storage, such as silage. They consume carbohydrates and provoke fat hydrolysis leading to nutritionally low quality grains. Organic acids

are known in the feed industry as an effective and affordable tool to control mould growth in grains and their byproducts during transport and storage.

Anaerobic preservation of grains usually applies when moisture is very high, from 25 – 45 percent. Grains are crimped before ensiling with formic acid based products.

Aerobic preservation is usually done with whole grains with moisture content between 15 – 25 percent. Typically, blends of different acids or acids with other active compounds are used, with propionic acid being the principle active component. The level of propionic acid needed under local conditions depends on kernel quality, initial mould counts, storage con-ditions and time.

Straight vs. buffered acidsThe mechanism of inhibition of growth

of moulds by organic acids is generally not considered a pH phenomenon. It is the propi-onate ion or radical (CH3CH3CO0-) that is the active mould inhibiting ingredient in propionic acid, so attempts have been made to use salts

of propionic acid to overcome the odour and corro-sion problems.

To enter into the mould cell, the acids have to pass a double barrier, the cell membrane and the outer cell wall of these moulds. Inside the moulds the organic acids dissoci-ate decreasing the intracellular pH and compromising the cell metabolism. The three-dimensional

structure and the lipophilic character of propi-onic acid seems to play an important role for the acids to pass through this double barrier.

Kemira has developed several mould con-trol products containing appropriately buffered acids avoiding the typical drawbacks of straight acids. The organic acids in the liquid Kemira Mould Control product range are buffered with ammonium or sodium, ensuring reduced corrosivity and volatility and a long lasting pres-ervation effect.

Ammonium buffering has the advantage of delivering a proton H+ supporting a more effective mould inhibitory effect. The inclusion of a lipophilic compound assures a better surface contact with grains and an easier penetration into meals and feeds. It will also improve the water binding capacity of feed materials and lower the water activity of feeds. This extends the shelf life, maintains the nutritional quality, and prevents the formation of mycotoxins in feeds and feedstuffs.

Formic acid based mould inhibitor Traditionally propionic acid is used against

mould and mycotoxin formation. The relative shelf life depends to a great extent on the pro-pionic acid content. Indeed, the lowest survival rates for Fusarium spp. and Aspergillus niger were achieved with the highest actual propionic acid contribution, irrespective of the type of mould inhibitors tested.

As the leading global producer of formic acid-based products for the animal feed industry, Kemira has developed a new liquid mould inhibi-tor for grain preservation based on formic and propionic acid with an excellent ammonium-sodium buffering system to minimise volatility and corrosivity and ensuring proper handling properties. It is activated by lipophilic com-pounds. Formic acid does not have this lipophilic characteristic but it contains the highest antimi-crobial properties as this is the smallest molecule of all the organic acids and has a > 60 percent higher number of active organic radicals per kilogram of pure substance.

The efficacy of such a novel ammonium-sodium buffered formic acid based product (Kemira Mould Control LF1) on reduction of Aspergillus niger in grinded whole wheat grains was assessed in a laboratory study done in the Kemira R&D center in Espoo-

Finland and compared to ammonium buff-ered propionic acid (Kemira Mould Control LP1 NC). Figure 2 shows that the initial inoculation with Aspergillus niger in grains without preservatives resulted in significant growth during the first week. Both Kemira Mould Control LP1 NC and Kemira Mould Control LF1 at 0.2 w/w-%, inhibited growth of Aspergillus niger in grinded whole wheat grains over a 2 weeks period and total kill off was obtained with both products at 0.4 w/w-%.

The same laboratory tests have been repeated in Wessling Laboratories. Also here the inclusion of 0.4 percent with both products showed to be efficient in killing off both types of moulds during a two weeks incubation period. The Fusarium moulds seemed somewhat more sensitive to the formic acid based mould inhibitor with total kill off at seven days already (Table 1).

The efficacy of Kemira Mould Control LF1 was further assessed in a simulated field trial at Wageningen UR, The Netherlands. The trial measured mould and temperature develop-ment of fresh harvested grains during a four month storage period at ambient temperature and results were compared to Kemira Mould Control LP1nc.

The treatment with the formic acid based Kemira Mould Control LF1 at 0.7 percent showed the biggest effect in preventing the temperature to increase. It was significantly (P<0.05) lower than both the positive control (propionic acid based) and negative control. Moreover, results showed that Kemira Mould Control LF1 at 0.4 percent is as effective in inhibiting mould growth and preventing tem-perature increase in freshly harvested grains with high moisture content (17.6%) as the propionic acid based Kemira Mould Control LP1nc. Mould growth was reduced from 5 log platable fungal colonies per gram in the non-treated grains down to 1.34 log/gram and 1.15 log/gram respectively.

This was also confirmed in a field trial in UK, monitored by Aberystwyth University in which freshly harvested wheat with a moisture content of 17.9 percent was rolled and treated with different dosages of the ammonium-sodium buffered formic-propionic acid based product or with the ammonium buffered propionic acid only and stored for eight months in 10 ton bins.

At nine litres per ton of grains, both products allowed easy storage without any temperature increase in the bins during the eight months. Initial mould counts at three weeks showed both products to be effective, compared to an untreated sample.

This makes Kemira Mould Control LF1, a for-mic acid based blend with a novel ammonium – sodium buffering and activated by lipophilic compounds, an interesting alternative to the traditional propionic acid based products, assur-ing the fast killing of any mould that appears on grains and assuring a save and long preservation.

More inforMation:Kemira ChemSolutions b.v.

Email: feed@kemira.com

Table 1: Mould inhibiting and killing-off effect of Propionic acid (Kemira Mould Control LP1) and formic – propionic (Kemira Mould Control LF1) buffered products in highly challenged conditions (Wessling 2011)

TREATMENTS RESULTS

Name %0.day

Mould cfu/g7.day

Mould cfu/g14.day

Mould cfu/g

Positive control: ASPERGILLUS inoculated 3.5∙104 4.7∙105 2.0∙107

Kemira Mould Control LP1 nc 0,4 1.0∙103 <50 <50

Kemira Mould Control LF1 0,4 8.5∙102 <50 <50

Positive control: FUSARIUM inoculated 2.2∙105 3.6∙105 6.4∙106

Kemira Mould Control LP1nc 0,4 2.0∙104 1.0∙102 <50

Kemira Mould Control LF1 0,4 1.0∙102 <50 <50

Negative control <50 <50 <50

Table 2: Mould counts in freshly harvest rolled wheat after three weeks storage with and without treatment (Aberystwyth University)

TreatmentMould count

(cfu/g)

Kemira Mould Control LP1 nc 227

Kemira Mould Control LF1 40

Untreated >1,500,000

Grain&feed millinG technoloGy20 | may - June 2012

FEATURE

GFMT12.03.indd 20 22/06/2012 08:49 GFMT12.03.indd 21 22/06/2012 08:49

From February 27 – March 2, 2012, the new Bühler Vega High Performance

Grain Classif ier MTVA was presented to the specialist public at Ipack-Ima in Milan, Italy.

Whether wheat , rye, oats, rice, corn/maize, or barley – the new Performance Grain Classif ier MTVA promises an except iona l l eve l o f performance with minimized energy consumption and a very low space requirement. It owes this performance to its special screen

design and the high kinetic momentum acting upon the screen carrier. The outstanding separation of impurities ensures optimal results for further processing and storage of grain.

Amazing energy savingsT h e n ew B ü h l e r Ve g a Performance Grain Classifier MTVA convinces by its high throughput capacit ies and low energy consumption – up to 50 percent energy savings over comparable machines are

possible. But Vega is also distinguished in many other respects by its exemplary efficiency. The use of high-grade components results in long maintenance i n t e r v a l s . E v e n i n c o n t i n u o u s operation, this keeps maintenance costs low. You can also save time and money when changing its screens, with quick and easy screen changes being p o s s i b l e by o n e person.

Perfectly adaptable to specific needsDepending on the s p e c i f i c d e s i g n version, the new Vega Per formance Grain Classifier MTVA can be applied for cleaning or grading grain. A total of three different cleaner versions have been designed to process a wide range of grain varieties at throughput rates varying between 15 and 200 metric tons per hour. In the product inlet, an optional air-recycling aspirator separates low-density matter and fines from the accept material. The screens can be selected from the screen module to suit a wide range of requirements. A total screen area as high as 28 square meters is available thanks to the horizontal staggering of the screens.

More inforMation :www.buhlergroup.com.

Top-class grain cleaning within the smallest spacePremiere of the new Bühler Vega High Performance Grain Classifier MTVA at Ipack-Ima 2012 in Milan, Italy

SKF has launched new SE bearing housings. The housings are an upgrade

of the SNL housing series, which have been used in many industries for many years.

SKF claim the SE housing is a reliable, versatile solution for mounted bearing applications and is designed to meet the needs of customers across virtually all industrial and processing sectors. The housings, which range from size SE 507-606 to SE 532, are designed to exploit the full service life potential of the incorporated bearings, a n d s i g n i f i c a n t l y reduce maintenance costs and related downtime.

The new design makes it unlikely for the housing to become distorted by over-tightening the attachment bolts A grease guiding system, for relubrication from the side, applies grease directly to t he be ar i ng dur ing relubrication. This greases the bearing more reliably, making it possible to reduce grease quantit ies during relubrication.

C o m p a r e d t o S N L housings, the SE housing improves heat transfer from the bearing outer ring to the support surface, reducing the temperature in the bearing. This makes it possible to extend relubrication intervals whi le increas ing the service life of the bearing and lubricant.T h e se h i g h q u a l i t y housings provide improved rust protection that is in accordance with the C3 corrosivity class ( ISO 12944).

More inforMation:Website: www.skf.com

SKF launches new SE bearing housing series

and is designed to meet the needs of customers across virtually all industrial and processing sectors. The housings, which range from size SE 507-606 to SE 532, are designed to exploit the full service life potential of the incorporated bearings, a n d s i g n i f i c a n t l y reduce maintenance costs and related

making it possible to reduce grease quantit ies during relubrication.

service life of the bearing and lubricant.T h e se h i g h q u a l i t y housings provide improved rust protection that is in accordance with the C3 corrosivity class ( ISO 12944).

More inforMation:Website: www.skf.com

News May - June 2012 NEWS

Grain&feed millinG technoloGy may - June 2012 | 3

THE GLOBAL LEADER

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+44 (0) 870-770-9861VORTEX.EU@VORTEXVALVES.COM

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DUST TIGHTCLEAN IN PLACE

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www.gfmt.co.uk

LINKS• Seethefullissue• VisittheGFMTwebsite

• ContacttheGFMTTeam

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A subscription magazine for the global flour & feed milling industries - first published in 1891

In this issue:

• NIR in practice

• Rice and contract terms

• New weighing software for UK co-operative

May - June 2012

• LC-MS/MS:The New Reference Method for Mycotoxin Analysis

• Fast, reliable and flexible:

the world of modern bulk weighing

• Mould controlin grain and feed preservation

GFMT12.03.indd 1 22/06/2012 08:48

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From February 27 – March 2, 2012, the new Bühler Vega High Performance

Grain Classif ier MTVA was presented to the specialist public at Ipack-Ima in Milan, Italy.

Whether wheat , rye, oats, rice, corn/maize, or barley – the new Performance Grain Classif ier MTVA promises an except iona l l eve l o f performance with minimized energy consumption and a very low space requirement. It owes this performance to its special screen

design and the high kinetic momentum acting upon the screen carrier. The outstanding separation of impurities ensures optimal results for further processing and storage of grain.

Amazing energy savingsT h e n ew B ü h l e r Ve g a Performance Grain Classifier MTVA convinces by its high throughput capacit ies and low energy consumption – up to 50 percent energy savings over comparable machines are

possible. But Vega is also distinguished in many other respects by its exemplary efficiency. The use of high-grade components results in long maintenance i n t e r v a l s . E v e n i n c o n t i n u o u s operation, this keeps maintenance costs low. You can also save time and money when changing its screens, with quick and easy screen changes being p o s s i b l e by o n e person.

Perfectly adaptable to specific needsDepending on the s p e c i f i c d e s i g n version, the new Vega Per formance Grain Classifier MTVA can be applied for cleaning or grading grain. A total of three different cleaner versions have been designed to process a wide range of grain varieties at throughput rates varying between 15 and 200 metric tons per hour. In the product inlet, an optional air-recycling aspirator separates low-density matter and fines from the accept material. The screens can be selected from the screen module to suit a wide range of requirements. A total screen area as high as 28 square meters is available thanks to the horizontal staggering of the screens.

More inforMation :www.buhlergroup.com.

Top-class grain cleaning within the smallest spacePremiere of the new Bühler Vega High Performance Grain Classifier MTVA at Ipack-Ima 2012 in Milan, Italy

SKF has launched new SE bearing housings. The housings are an upgrade

of the SNL housing series, which have been used in many industries for many years.

SKF claim the SE housing is a reliable, versatile solution for mounted bearing applications and is designed to meet the needs of customers across virtually all industrial and processing sectors. The housings, which range from size SE 507-606 to SE 532, are designed to exploit the full service life potential of the incorporated bearings, a n d s i g n i f i c a n t l y reduce maintenance costs and related downtime.

The new design makes it unlikely for the housing to become distorted by over-tightening the attachment bolts A grease guiding system, for relubrication from the side, applies grease directly to t he be ar i ng dur ing relubrication. This greases the bearing more reliably, making it possible to reduce grease quantit ies during relubrication.

C o m p a r e d t o S N L housings, the SE housing improves heat transfer from the bearing outer ring to the support surface, reducing the temperature in the bearing. This makes it possible to extend relubrication intervals whi le increas ing the service life of the bearing and lubricant.T h e se h i g h q u a l i t y housings provide improved rust protection that is in accordance with the C3 corrosivity class ( ISO 12944).

More inforMation:Website: www.skf.com

SKF launches new SE bearing housing series

and is designed to meet the needs of customers across virtually all industrial and processing sectors. The housings, which range from size SE 507-606 to SE 532, are designed to exploit the full service life potential of the incorporated bearings, a n d s i g n i f i c a n t l y reduce maintenance costs and related

making it possible to reduce grease quantit ies during relubrication.

service life of the bearing and lubricant.T h e se h i g h q u a l i t y housings provide improved rust protection that is in accordance with the C3 corrosivity class ( ISO 12944).

More inforMation:Website: www.skf.com

News May - June 2012 NEWS

Grain&feed millinG technoloGy may - June 2012 | 3

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