Oil Expelling: Crambe Seeds


What does a pelleting system consist of?

Why pellet?

The most obvious reasons are:

•             Better digestibility;

•             Less waste during consumption and transportation & storage;

•             More assured intake of all elements;

•             Conversion of powdery / unpalatable ingredients to concentrated feed and ensuring separated mixed ingredients are all consumed;

•             Higher bulk density and therefore less storage & transportation space;

•             However, the most compelling reason for pelleting is that the gain per kilogram feed increases with pelleted feed vs mash.

•             It has been innumerable times proven that swine specifically gained on average 113 grams per day more weight being fed pellets than the same ration and amount of mash. Poultry, cattle and small stock likewise has similar gain advantages.

•             In the case of sheep and goats, which are notoriously picky eaters, the full ration and waste are also important reasons to pellet feed.

What is the cost of pelleting?

Pelleting should not add more than R103 (US$6-7)  per ton to your feed, which includes electricity, maintenance, wear and tear, and operator cost.

At one pig’s average consumption of 2.5kg feed per day, a ton of feed would last 400 days or would finish approximately 4 pigs to 80-90kg. With 113 grams additional weight per day on pelleted feed, the said pigs would gain 51 additional kilograms, being more than R1,200 higher income at slaughter at R24 per kg live weight.

Therefore a 1,165% gain over the additional operational cost.

Can cost be reduced & efficiency increased by adding steam?

Yes it can. Steam lubricates the product for faster production, the lubrication extends die life, it reduces energy costs and gelatinizes starch for higher nutritional value. Fines also bind better and less pellet breaking occurs.

Heating mash with steam to 75 degrees C will reduce friction heat no less than 30% and reduce motor amps by 20% while increasing capacity fourfold. The amount of roughage vs grain and protein, molasses content etc. would however play a role in these equations.

While steam addition at 50kg per hour or 5% on a 1,000kg/hour mill, an additional electricity cost on around 37kW can be expected. This however would be easily offset by the higher production and lower replacement cost of dies as well as lower electricity per kilogram produced on the pellet mill itself and a payback of less than 6 months.

An electric steam generator can be purchased from ABC Hansen for around R119,400 VAT Included. This steam generator will produce 50kg. of steam at working pressure of 101 PSIG (pounds per square inch guage) operating at 4 – 94 PSIG (or around 7 Bar) with 3 x 12kW = 36kW elements plus a 0.55kW pump and is a perfect match for our MPEL400  and one or two MPEL260 pellet mills.

What does a pelleting system consist of?

1. Supply bins and intake: With free flowing grain and other free flowing materials hopper bins are normally filled by elevator and conveyor from bulk trucks. Bagged free flowing materials may also be discharged into a reception bin and conveyed into a supply bin. Non-flowing items are normally offloaded in heaps and collected with front end loaders into reception bins on load cells prior to conveyance to the pre-blending bin. Should these non-free-flowing materials be loaded into a bin, a roto-flow vibrating device needs to be installed below the bin. The supply bins should have at least 5 times the capacity of the pre-blending bin.

2. A scalper fitted with magnets to screen out large particles and tramp steel should be part of the intake system in order to prevent damage to all equipment down-line.

3. Milling: It is preferable to grind down the raw materials to a size is at most equal to the pellet die aperture and preferably smaller. Particles any larger would imply that the pellet mill would be tasked to grinding these particles resulting in higher wear and tear, higher electricity use and lower capacity. A Hippo hammer mill should be selected in the correct capacity. This range of mills includes

4. Pre-blending bin: This is preferably located over the blender allowing the complete ration to be made up and dumped into the blender once the previous blend has been unloaded. This increases the number of batches to be mixed per hour.

5. The blender: The size of the blender together with the speed of conveyance into the pre-blending bin and the speed of unloading  determines the capacity of the mill. Blender capacity in liters would presume that the blender is filled only to the shaft and the density of the mix is then calculated to determine the kilogram capacity of the blender. A 3,000 liter blender filled to the shaft at around 1,500 liters, with a density of 0.6 would determine a mixing capacity of 900 kilograms per batch.

6.Post blending bin: Where the batch is immediately conveyed to subsequent to mixing, usually at the fastest capacity possible to ready the blender for the next mix and is at least two or three times the capacity of the blender and matching the capacity of the pellet mill times 3 to allow for the clearing of blockages, change of die and other non-scheduled and scheduled break in continuous production.

7. The conveyor feeding the pellet mil, allowing for minute speed selection to allow the mill to operate at most efficient capacity.

8. The steam generator with steam addition to the conveyor feeding the pellet mill or in a special conditioning chamber with feed, is normally in capacity of 5 – 7% of the normal production of the pellet mill without steam having been added. With 3 x the capacity of the pellet mill without steam, at least 2% moisture should be added to the mix containing a minimum of 12% moisture prior to steam addition. Wet molasses addition and further water addition may be used to bring the mix to +- 12% prior to steam addition. The pelleting process would remove around 2% moisture from the mix resulting in neither shrinkage nor gain. Higher moisture addition would result in higher gain but also in more pellet breakage – thus a 2% gain is generally accepted as optimal.

9. Pellet mill: The original pellet mills manufactured and patented in 1931 in California, had a stationary flat die. Today primarily cylindrical as well as flat revolving and stationary dies are used. Smaller mills up to +- 30 kw and 1 ton capacity per hour on dry basis are often flat dies due to its relatively simpler design, faster cleaning (when blockages occur), lower die-, roller- and maintenance cost and generally lower market entrance cost. Speed reduction may be either be V-belt with sprocket and chain and gearbox. Mills are generally driven by electric motors but diesel or petrol engines with gearboxes are often fitted. Ensure the supplier has sufficient dies and rollers and other spare parts in stock and is able to service the mill, before buying it. It is strongly advised not to try and import a pellet press yourself as end user as you will probably end up re-buying this machine several times over.

10 Pellet cooler and grader: Pellets need to be cooled with cold air to avoid sweating which produces cracking and disintegration. Broken pellets are screened out and may be used to either re-introduce into the pellet press or may be crumbled for small sized feed for poultry and birds. The preferred conveyance methods are bucket elevators and belt conveyors to avoid breaking of pellets

11. Crumbler: This is a roller mill through which pellets are run crumbled to the desired size for feeding chicks of various types.

12. Finished products bins are  filled with bucket elevators and  belt conveyors and unloaded the same way into bulk feeding trucks or bagged off for further distribution.

These and many more pelleting facts can be obtained by visiting www.abchansen.co.za.


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By Dr André van der Vyver, University of Pretoria

Grain storage has been a politically sensitive issue since the beginning of the 20th century. In the early 1900s there was hardly any grain storage available in South Africa and the few facilities that existed belonged to milling companies such as Premier Milling in Newtown, Johannesburg which erected some of the first, limited facilities to store flour, imported wheat and grain purchased from local farmers. It was only in the years that followed the promulgation of the South African Marketing Act in 1937, that storage was collectively built by farmer co-operatives who, as agents, stored grain on behalf of the agricultural Control Boards that was established under the same Act.

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ExPress® Soymeal in Swine: New Data

Insta Pro® is constantly evaluating new and existing processing technologies at our Hanson & Said Research and Development Center and testing ingredients through multiple animal feeding trials throughout the year. In 2018, a study was conducted at the University of Illinois to update information on digestibility of amino acids and energy concentrations in ExPress® soymeal with respect to hexane-extracted soybean meal fed to growing pigs. ExPress® soymeal had an advantage of +3.6% improved digestibility of essential amino acids in comparison with the hexane-extracted soybean meal.

Digestibility of all amino acids is enhanced in ExPress® soymeal versus hexane-extracted soybean meals. This includes essential amino acids as well as less recognized amino acids like valine, which can limit production in certain situations like the nursery phase.

ExPress® soymeal contains less moisture (higher dry matter) than most ingredients. Less moisture equals concentrated nutrients and more room in the diet for other ingredients. 

Results from this study demonstrate the proper use of processing temperatures during high-shear dry extrusion (which is the cooking step of the ExPress® process) as a key factor to produce a high-quality feed ingredient and consequently, better digestibility of amino acids and increased energy concentration in one ingredient for proper diet formulations.

Furthermore, pigs not only need amino acids but also energy for normal activities, such as growth and meat production. In the same feeding trial it was shown that ExPress® soymeal has +609 kg/DM of metabolizable energy concentration in comparison to solvent-extracted soymeal which means more energy is available to be used by pigs for productive purposes.

This advantage is due to the nutritional value of ExPress® soymeal, which has more residual oil in the meal when compared to the solvent-extracted soymeal. More residual oil in the meal means no need to add fats or oils of questionable quality to swine diets to provide energy. Knowing the values of metabolizable energy and digestible amino acids of ExPress® soymeal allows more precise diet formulation to assure an adequate balance of amino acids and energy in pig diets.

Nampo 2019 and ABC Hansen

As usual, the ABC Hansen with its Hippo Mills and Scanwood Solution division again has something special to offer our customers at Nampo.

This year our focus is on animal feed production through different routes. Our Danish sister company Cormall has, for many years focussed in straw, hay and silage processing mainly to the biomass energy market but also to the dairy and beef cattle sector. It’s very large spiral mixers in capacities 18m3, 22m3, 30m3, 42m3 and 50 m3 has been the cornerstone of its processing system and we have brought these magnificent mixers to Nampo this year.

The MX30 mixer can handle some 7.5 tons of straw, hay and a higher tonnage of silage in one mix and at 8-15 mixes per 8 hour day, some 60 – 120 tons can be processed in one day. The most remarkable feature however is the low power consumption of only 44kW on the 50 cubic meter mixer versus at least 240 kW on a similar vertical mixer, or just 18% of the vertical mixer’s power. And the high efficiency difference is obvious when considering the following comparative ratios:

  1. Feed variation 16.1% in Cormall vs 41.9% in vertical mixers.
  2. Mix variation 3.7% vs 9.4% in the verticals.
  3. Mineral variation 2.4% in Cormall mixers vs 9.4% in vertical mixers.

The mixer is filled with front end loaders. Bales are added without shredding and the mixed product is overhead discharged on completion in bulk trailers with unload capacity and small tractor driven.

Poultry, swine and other feeds can be mixed with the same efficiency and is easily loaded without additional conveyors into bulk cars.

Hippo Mills exhibits its HayKing hammer mill with matching HayKing hammer mill and paddles mixer in 3,000liter capacity. The landmark silo at the site this year caters for a Fine Milling Accessories and Equipment exhibition inside, well worth having a look and picking up some bargains.

Scanwood will focus on chippers – with an amazingly low priced mobile chipper being a Grizzly 180 chipper converted in-house with petrol engine drive, displaying applied local technology saving our customers thousands with the same prime equipment they are used to. Bushgraze technology will also feature prominently with systems whereby drought stricken farmers can benefit greatly.

ABC Hansen Grain is still our main feature with the 750 ton silo on site, the 100 ton per hour grain pump and the new tractor driven 200 – 240 ton per hour bunker unloader on display.

Visit ABC Hansen and Scanwood Solutions at stands numbers C34A and C3. Looking forward to farm with you.

Moringa Oil Test

The test was started with the worm in the open position, and product was fed into it to start the warm up process. The cake was mixed with the product to speed up the warm up process. This took a while because the product press easily and there are not a lot of resistance from the product side. The worm was closed as the machine warms up. The product with the husk still on was tested first. The product pressed easily and a thin cake could be produced without burning the cake. The oil also came out easily.


While the press was running we changed the product to the product without the husk. The product pressed well but due to the absence of the husk the cake came out to easily from the press and by doing that some amount of oil came out with the cake, that can be because without the husk the resistance inside the press is less, that would cause the oil not to be pressed through the press rings.


The product with the husk on was then introduced into the press again, and everything changed back to where it was before. The cake came out thinner and the oil did not come out of the end with the cake, and the cake came out thin sheets as with the product without the husk the cake was wet and folded up.


The conclusion is that the product with the husk pressed better than the product without the husk.


The whole test was just more than an hour and plus minus 100 kg of product was processed, if the warm up time is deducted from the running time and you will be able to do in the region of 100 kg per hour.


The capacity is dependent on the quality of the seed, moisture and conditioned or not.

Moringa before

Moringa after

Moringa Oil

Moringa Oil after press.




Youtube Video on the Oil Expeller : https://youtu.be/fA_Z08MWg6E

Hippo mills the market leaders in the USA for the production of cannabis/hemp processing and milling.

Our Hippo mills are currently one of the market leaders in the USA for the production of cannabis/hemp processing and milling.


See the testimonial below of one of our happy customers – who bought a Hippo 57 through our dealer Pleasant Hill Grain:


“We got the #69 Hippo to process hemp into a small particle for an ethanol extraction process to extract the cannabinoids (CBD). Using a 10mm screen in a 6-7 hour shift, we’re comfortably processing 3,000 pounds per day. We could easily step up production output if needed.

With one added component, the Hippo is performing very well for us. When we first got it, the 60 HP motor was running at approximately 4,700 RPM’s and grinding finer than we wanted. To control the speed of the motor we installed a variable frequency drive (VFD) and now the mill produces the ideal particle size for ethanol extraction of CBD. The revolutions per minute were reduced to 2,300. We achieved this by reducing the frequency by 50% to 30HZ. Now the size of the particle is similar to that of material you would place in a pre roll cigarette. We normally run dry biomass however if a batch comes through with a slight increase in moisture content we can increase the HZ on the VFD to ensure the material runs through the mill cleanly.

Our milling room is about 1500 square feet, with a 12 foot ceiling. At the end of the shift there’s some fine dust on the floor, which we just mop up. The 8 filter bag system installed on the mill works well in securing the majority of the dust created in processing. We use the tie that comes with the super sacks to secure the bag to the bottom of the cyclone. Once filled, we replace it with a new bag. We use compressed air to clean the internal and external parts of the mill.”



Catnip Milling

Another day, another test. This time we tested the Universal mill for milling Catnip – or also known as catswort or catmint – scientific name is Nepeta Cataria. We ran the catnip through the Universal Mill, using the hammer mill attachment at 2000RPM, and the results speak for themselves. We milled the first batch through a 3mm screen, and the second  batch through a 5mm screen.

Catnip milled trough a 3mm screen.

Catnip milled trough a 5mm screen.


Ascorbic acid (Vitamin C) test with our Universal Mill

Today we tested ascorbic acid (Vitamin C) , for a baking ingredients supplier through our Universal Mill using the pin attachment with great result.


The ascorbic acid was milled through the stainless steel pin mill, running at 4,000RPM, and the result after milling was 87% through a 212micron screen in a single pass at a capacity of nearly 400kg/hr. Higher results can be obtained by running the product through the mill again, or by reducing the capacity slightly.


Just another add on to a long list of applications for the versatile Universal Mill.

Ascorbic acid (Vitamin C) Pre-Milled


Ascorbic acid (Vitamin C) After Milling