CS231753B1 - Preparation of volume nourishment from non tradition wood raw material - Google Patents

Description

Ensuring the planned livestock production is primarily dependent on adequate growth of the fodder base. Lack

Table 1

The composition of the classical ration of voluminous feed is replaced by cereal mi (Table 1).

Hay ration [%] Barley [%] Wheat K bran [%] ločovina [%] Beet molasses [%] Classical 35 17 33 - 15 Dec Therefore, methods are sought measures, mainly small-scale assortments of wood that allow you to expand resources vol resulting from mining in industrial feed. One way to solve this problem not yet are still full of consists in more intensive use of meadow grass used, such as e.g. mushrooms, roots, sawdust, fund. Another way is offered in other shavings and the like. similar raw materials lignoceluló- Composition and digestibility wood waste composition such as hay and straw, in comparison with traditional feed- are used alone or as ingredients Table 2 shows. or in granules. He's coming here Table 2 Digestibility of some lignocellulose materials Lignocellulosic material Mainly ingredients Digestibility cellulose hemicelluloses lignin [%] [%] [%] [%] Spruce sawdust 50 19 Dec 28 0— 2 Beech sawdust 47 30 22nd 3— 5 Barley straw 40 30 19 Dec 40—43 Meadow grass 22nd 66 11 60-70

It is believed that the low digestibility of wood mass is due to the high proportion of lignin and its binding to sugars in the lignocellulosic complex, which reduces access to polysaccharides for microbial digestion in ruminants.

To increase the digestibility of wood mass, various treatments are used. In the literature there is data on the possibility of preparing such feeds only from soft deciduous trees, mainly poplar (Timber Producers 1978, No. 4), the process being discontinuous and canonical pulping at a pressure of up to about 7 MPa. Non-pressurized vibration milling experiments have also been performed [Pew J. C. et al., Tappi 1962, 45 (3), 247-256; Mille.tt M. A.] resp. with grinding on a wheel mill, grinding straw. The effect of hydrothermal treatment on digestibility of lignocellulosic raw materials, resp. other chemical treatments.

It has been shown that digestibility of lignocellulosic raw materials increases by autoclave steaming at a pressure of e.g. 0.8 MPa. The lack of steaming of small wastes in the autoclave in a stationary manner is the fact that the wood raw material does not react uniformly, but that it is formed in the layer of wood filling of the canal, through the vapor through the least resistance and a large part of the raw material remains unreacted. This is manifested both in a limited increase in digestibility and in the sintering of the filling due to secondary changes of the resulting carbohydrates into bituminous and humic substances, which are worthless and undesirable in terms of digestibility.

According to the invention, it is a connection of hydrolysis action with continuous defibrillation in coniferous resp. hard deciduous woods (spruce, beech, etc.) under moderate pressure which according to our knowledge has not been solved by the method proposed by us so far.

The essence of the invention is that wood matter (impregnated with chemicals such as acids, bases, sodium sulfite, but such that their residues do not negatively affect the health of the animal in the form of chips or forest waste or wood waste after continuous steaming at saturated steam pressure from 0.6 to 1.4 MPa in time up to 15 min The pulped material obtained is uniformly activated and is perfectly miscible with its other fibrous structure with other components of the feed rations.

231733

Hydrothermal treatment of the wood mass occurs uniformly during continuous steaming and pulping. Organic acids (acetic acid and others) are formed which, at elevated temperature, hydrolyze the saccharide, mainly the hemicellulose and amorinous cellulosic parts of the wood mass, reduce the crystalline proportion of cellulose, partially cleave the lignosaccharide bonds, allowing access for microbial activity.

The hydrolyzed polysaccharide fraction in the form of oligo- and monosaccharides remains on the prepared fiber and plays a role both as an energy source and as an energy source. as an adhesive component necessary for granulation, for which purpose a deficient beet molasses has been added to date.

Exemplary woodworking is impregnated with, for example, acetic acid in an amount of 0.5 to 1%, based on a, s. The acid concentration is chosen such that the moisture in the sawdust is about 50%.

The impregnated sawdust is pulped in a defibrator (eg Asplundj type at a saturated steam pressure of 1.2 MPa. The steaming time in the defibrator preheater is set to about 10 min. The pulped sawdust is collected in a storage tank. compared to 3 to 5% digestibility for untreated beech sawdust), it can be used as a partial substitute for voluminous feed at ruminant feed ration.

Beech sawdust, which is formed by mecua-

Table 3 Compound ration p wood fodder Feeding dose Share Barley Wheat Urea Repná hay defibro- [%] weighted 10 / ol bran [%;] |%! molasses P% l]

sawdust

Proposed 15

The treated disintegrated sawdust may also be used in a granular feed dose.

The method for the continuous preparation of bulk feeds according to the invention makes it possible to economically utilize wood waste and wood chips of every kind and quality in ruminant feed rations.

Claims (1)

Method of preparation of voluminous feed from untraditional wood raw materials, distinguished by the fact that wood material impregnated with chemical hydrolysing substances in the wood and wood or wood waste impregnated is pulverized after a condensation steaming at a saturated steam pressure from 0.6 to 1.4 MPa per time to 15 min.