KAHL Expander: Benefits and advantages in animal nutrition

The KAHL (Process) Technology: Over 30 years of success

In addition to the flat die pellet mill, with which AMANDUS KAHL has made a reputation for itself on the worldwide financial market in varied industries for a number of a long time, the expander can also be a part of the product vary of the German machine producer. With regard to feed manufacturing, the KAHL annular hole expander and the expander know-how are among the many finest and simplest conditioning processes for compound feed and particular person parts.

The KAHL expander is pushed vitality effectively by a gear with built-in most important bearing and consists of a thick-walled, wear-protected tube – geared up with wear-resistant proportioning, mixing and kneading components. Unlike the extruder, which is supplied with a die at its entrance finish, the expander finish is supplied with a hydraulically adjustable cone which varieties an annular hole with the fastened outlet ring. By technique of adjusting the cone throughout operation, stress, depth of kneading, product heating and vitality consumption will be managed and programmed repeatedly and instantaneously. Depending on the product, the stress is between 5 and 120 bar, the working temperatures on the expander outlet are between 90 and 120°C to 130°C for many functions, relying on animal species and feed, however will also be increased for extra particular functions. The conditioned product is discharged from the KAHL expander through the cone. The stress drops, the product expands and a part of the added water evaporates (flash evaporation). Post-drying is often not needed. The particle dimension of the expanded product will be decided by way of the downstream crushing system.

The expander therapy previous to pelleting improves the digestibility of the primary vitality sources within the feed. Photo: Amandus Kahl

Advantages ensuing from using an expander

Which benefits outcome from using an expander within the compound feed trade? Various manufacturing steps are needed to provide compound feed. The expander is commonly put in upstream of the pelleting line. When utilizing the expander, feed producers profit from quite a few benefits with only one machine. In explicit, these are, for instance, the upper output of the pellet mill, often by greater than 25%, generally even 100%, and the improved pellet high quality with considerably lowered abrasion values. The KAHL expander can also be ideally suited to short-term conditioning processes and thus for eliminating pathogenic germs or moulds. It can also be appropriate for mixing and kneading, homogenisation and agglomeration. In addition, using the expander causes the decomposition of plant cells and microorganisms by way of growth. But particularly with regard to profitable and economical animal vitamin, the expander proves to be a key component.

Expander in animal vitamin

Expanded feed offers quite a few benefits within the feeding of poultry, pigs and dairy cattle. The growth course of is characterised by optimistic nutritive results, reminiscent of increased starch modification and better fats and crude fibre digestibility. Antinutritional components are eradicated and metabolisable vitality is elevated.

The hygienisation of feed is especially vital within the manufacturing of layers feed. While poultry fattening feed is often pelleted, this isn’t the case with feed for laying hens. This signifies that there isn’t a hygienisation within the KAHL flat die pellet mill. Instead, that is simply achieved by way of the KAHL annular hole expander.

Pig feeding will also be improved by utilizing the KAHL expander. For similar to poultry, pigs additionally want a rough feed construction to keep away from susceptibility to salmonella and different pathogenic germs. An optimised digestibility results in a greater feed conversion and a big discount in feed prices. In addition, there’s a lowered urine manufacturing because of lowered water absorption throughout feeding.

Starch modification and discount of antinutritive components

KAHL crown expanders, an extra improvement of the confirmed annular hole expanders, can be utilized to extend the digestibility of starch in cereals reminiscent of corn, wheat or barley. Due to the confirmed versatile therapy depth, processing of various merchandise is feasible – from conditioning of compound feed to intensive therapy of mono-components.

Different crown shapes and direct crushing lead to merchandise with an outlined construction and form. Thanks to the hydraulically adjustable cone, the processing will be began and stopped with the machine open and empty.

The clever management system and the hydraulic unit guarantee steady and protected operation even with various working circumstances.

Especially for piglet feed, a particular conditioning of grain is critical to make sure optimum digestion. Research reveals {that a} starch modification between 60 – 70% can enhance the burden acquire of younger piglets. This is especially vital throughout the essential weaning part when piglets are very full of life. Losses can thus be averted.

At the identical time, the expander reduces antinutritive components throughout this course of step. The discount of trypsin inhibitors in soybeans, for instance, results in a rise in nutrient consumption and thus to a lowered quantity of feed required. Trypsin inhibitors impair protein digestion, particularly in younger animals, because the enzyme steadiness of their digestive tract just isn’t but absolutely developed.

Expanded beans and peas as a very good and cost-efficient feed part

By-products from beans and peas are glorious feed parts. These uncooked supplies provide a number of benefits: Expanded husks of legumes reminiscent of peas or soybeans, which nonetheless comprise residual components of the bean, can be utilized as a protein supply in feed mixtures. At the identical time, a by-product reminiscent of seed coats can be utilized as a low-cost crude fibre part to extend the dietary worth in feed manufacturing. Here, too, prior growth is totally advisable so as to obtain optimum utilisation.

Enhancement of protein carriers in dairy cow feeding

The optimisation of nutrient digestion within the particular person intestinal segments of the animal is of nice significance in animal vitamin. Component therapy with the KAHL crown expander allows the manufacturing of ruminally undegraded proteins which may solely be digested within the small gut. This permits increased animal performances to be achieved.

With the KAHL crown expander, proteins reminiscent of these from full-fat soybeans or soybean and rapeseed extraction meal will be handled effectively. The excessive temperatures outcome within the current proteins being modified in such a means that they’re rumen-stable and might solely be digested within the small gut. In this manner, optimum feeding of the dairy cow is ensured, which is mirrored in most milk yield. In addition, expanded feed tastes good to dairy cattle.

Nutritional impact

The expander therapy previous to pelleting improves the digestibility of the primary vitality sources within the feed. The digestibility of starch, crude fibre and crude fats within the components is elevated. This permits the vitality content material within the feed ration to be lowered whereas sustaining the identical animal efficiency. Tests have proven that an expanded and pelleted feed with a decrease vitality content material can guarantee the identical animal efficiency as a pelleted feed with out expander therapy. In broiler fattening a discount of the metabolisable vitality of fifty to 70 kcal/kg of feed is thus doable. This vitality discount produces a price saving of 5 to 7 €/t of compound feed, relying on the uncooked parts chosen.

Heat improvement: Expander and pellet mill

The expander permits exact management of the method parameters. Data reminiscent of “stress” and “temperature”, that are vital for correct course of management, are recorded and displayed. The desired vitality enter will be reliably adjusted through the variable positioning of the cone.

This is the place the information of the expander differ from that of a pellet mill. In the pellet mill, the warmth improvement that invariably takes place within the die is often not recorded. Thus, no precise conclusions will be drawn concerning the impact of temperature on feed and components.

As there isn’t a temperature measurement within the holes of the die, the method temperatures of the expander can’t be in contrast with these of the pellet mill. The present consumed is transformed into warmth through the friction generated when the pellets are fashioned. As an approximation, a temperature enhance within the die of 20°C at an vitality enter of 10 kWh/t will be assumed.

Process and product assessments at KAHL

In the previous, many product and course of assessments had been carried out at AMANDUS KAHL. For this function, KAHL’s personal pilot plant in Reinbek close to Hamburg is on the market to potential prospects. In this manner, quite a few events and later KAHL prospects might already take a look at the optimum processes for his or her future enterprise.

Optimum manufacturing processes have a number of results. Thus, not solely the potentials for optimum product high quality are examined, but additionally the facet of economical manufacturing is taken into account. AMANDUS KAHL additionally offers help concerning doable product tendencies, course of developments, market necessities and the testing of recent mixtures. The animal nutritionists employed by AMANDUS KAHL play an vital position in buyer advisory service, as they supply prospects with detailed data.

The KAHL community doesn’t solely cowl mechanical and plant engineering, but additionally cooperation with famend institutes, analysis services, universities and unbiased consultants. Tests will be carried out with a couple of kilograms as much as a number of tons of product.

AMANDUS KAHL: 140 Years of German engineering

The medium-sized machine and plant producer AMANDUS KAHL can look again on nice success in a number of areas. The owner-managed firm has made a reputation for itself on the worldwide market, notably with its flat die know-how within the subject of “pelleting”. The flat die pellet mill being the center of the corporate, the opposite machines of the intensive portfolio are additionally characterised by high quality “made in Germany”. Not solely pellet mills and expanders are designed and manufactured in Reinbek close to Hamburg, but additionally extruders, crushing curler mills, pan grinder mills, material belt driers, coolers, proportioning items and lots of others. Worldwide prospects and a diversified gross sales community present that AMANDUS KAHL is likely one of the most vital machine and plant producers within the worldwide animal feed trade.


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