SU869740A1 - Method of obtaining food hydrolytic sugar - Google Patents

Description

(54) METHOD FOR OBTAINING STERN HYDROLYSIS The invention relates to hydrolysis production, in particular, to a process for producing feed hydrolysis sugar, and can be used in animal husbandry as a feed product and in hydrolysis industrialization as a basis for growing protein feed yeast. The search for ways to normalize the sugar – protein ratio and the increase in the content of easily digestible carbohydrates in the diet of agricultural animals led to the creation of a basis for the widespread use of feed hydrolysis sugar in animal husbandry. At present, the main source of replenishment of sugar deficiencies in animal feed is fodder roots, which are distinguished by low sugar content (4-6%), poor preservation and high labor intensity during cultivation. In addition, the possibilities for expanding food for root vegetables are limited. When it is introduced into the diets of farm animals, hydrolytic sugar replaces the easily digestible carbohydrates produced in conventional feeds, including root vegetables. SAHARA Wood hydrolysis, which makes it possible to convert cellulose into easily digestible sugars, is a well-developed process and is used in the hydrolysis industry as one of the stages in the production of fodder yeast and alcohol. A known method for producing a fodder sugar-containing product from wood, including acid hydrolysis of wood waste, sludge hydrolyzate for separating impurities, neutralizing it 1. The disadvantage of this method lies in the poor quality of the resulting feed product, since its impurity limits its use for animal feed. Closest to the invention is a method involving the thermo-acid hydrolysis of wood raw material followed by the separation of lignin and the processing of the hydrolyzate by suction of the hydrolyzate to separate the impurities, neutralize it, add an additional residue of neutralization and evaporate it I2. The disadvantage of this method lies in the duration of the process of semi-g

cheni feed product. Sludge hydrolysis of ata before and after neutralization is a very long operation (60-70 hours); At the high temperature of the hydrolyzate, this leads to a loss of sucrose and a deterioration in the quality of the resulting feed product.

The purpose of the invention is to intensify the process of obtaining a feed product and improve its quality by reducing the content of harmful impurities.

This is achieved in that in the method for producing fodder hydrolytic sugars zaklyuchayuschegos in thermoacid hydrolysis of wood waste, cooling gidrrlizata with separation of lignin and treating the wood hydrolyzate, by neutralization of the sludge and evaporation, after cooling was blown steam hydrolyzate, filtering and cooling vadelvniem furfural vapors and an acid condenser, the neutralization of the hydrolyzate being doubled to 3.5–4.0 and after evaporation to a pH of 4.55, 5 with intermediate filtration and evom through the purge vapor, and after evaporation neytralizovannI gydrolizat further decanted.

Selected condensate is washed

lignin and use it for acid hydrolysis acids, and the treated lingin is used as a filtrate

for hydrolysis ..

The proposed method is carried out as follows. Process chips are loaded into the hydrolysis unit, steamed and impregnated with O, 8% sulfuric acid solution. As a result, a hydrolyzate is taken out of the hydrolyzate, i.e. a solution of sugar and acid in water.

The hydrolyzate contains sugars, volatile organic acids, lignohumic substances, furfural and its. derivatives. Therefore, the preparation of susbstrates for obtaining feed sugar, which has a number of specific features, is very important.

The hot hydrolyzate is cooled to prevent the disintegration of the monosaccharides, then a hot purge is carried out to consolidate and coagulate the colloids of lignohumine; substances. After purging, the hydrolyzate is clarified, i.e. suspended impurities precipitate, removing from the solution lignin containing hydrolyzate containing gumin in substances from the solution. Furfural and volatile organic acids are separated from the clarified hydrolyte. The vapors are cooled with their concentration, and furfural is separated from the formed liquid from the aqueous solution of volatile acids. Acidic condensate is fed to the lignin as well as wetted, and the raw material is used as cooking liquid. The hydrolyzate remaining after cooling is subjected to inversion, i.e., exposure at a temperature of 130 ° C with the addition of a 3% evaporated post-yeast mash. Easily hydrolyzed, the polysaccharides in the hydrolyzate process are dissolved and already in solution are hydrolyzed to complete conversion to a monosaccharide. This is often the case, especially with pentose hydrolysis,

A significant part of the dissolved carbohydrates is still in the hydrolyzate in the form of complex sugars. In order to finally transform them into monosacchars, an inversion is necessary, which is the necessary stage of the technological process in the preparation of pentose gcdolysates. Non-inverted carbohydrates (dikstriny) reduce their further processing. In the process of inversion, a precipitate is separated from the hydrolysis.

 hardened resin and weighed dig NIN. 80% of the digstrins are hydrolyzed to monosaccharides, the amount of which increases by 7-8%.

Invert Acid Hydrolyzate

5 served to neutralize. Neutralizing the action of sulfuric acid in, Lu Ug, duct is necessary, because in the digestive tract of animals cellulose-decomposing bacteria die in an acidic environment. In order to obtain unified feed sugar, neutralization and neutralization are carried out with milk of lime (150 g of CaO in 1 liter of water), and for the production of COFFEE sugar

5, only for ruminant animals, neutralization is carried out with lime milk, and the neutralization is carried out with ammonia water.

In order to reduce the dissolved gypsum content, the hydrolyzate is neutralized to a pH of 3.5, corresponding to the complete binding of the gypsum contained in the sulfuric acid hydrolyzate. The seed of small crystals of gypsum eliminates the imbalance of the solution, to

5 waters, kondeitration of gypsum to 1, 8gM.

The neutralizer has a t-80 ° C, pH 3.5 contains suspended particles of gypsum and organic matter, from lignin, coagulated humic substances, resinous substances. Therefore, it is clarified. The precipitate (sludge) is compacted, squeezed out of it to 5% of sugars, which are returned to production. The slurry is purged for oxidation and coag. of the lignohumic complex and the transfer of part of the dissolved gypsum into suspended: the rest ..

The slurried sludge is filtered, the sugar containing solution is returned to it with neutralizing agent, and the sludge is used as fuel for the boiler house. Cloned by her. The tilt is heated by sucker fumes. In the upper part of the hydrolysis apparatus, iTa, where hot ie-5 RBOp is fed, the hydrolysis ends earlier.

than the bottom. When it is necessary to quickly reduce the temperature of the liquid in the apparatus, it is necessary to blow off steam. The liquid boils up in the entire volume of the mass, which promotes the removal of sugars from the particles of the hydrolyzable material into the solution. After deep blows / due to the grouting of the hydrolyzable raw material, the output of the hydrolyzate is usually improved. Two or three blows are carried out during cooking. When steam is supplied to the hydrolysis apparatus for heating the raw material at the initial stage of heating, air and volatile products are blown off.

The heated neutralized acid solution of pH 3.5 with a gypsum content of 1.8 g / l is sent to the residue. After evaporation, the pH in the natural product rises to 27%. Then one stripped off of the neutralization is adjusted to pH 5.0. Up to 15% of sugars are lost during the evaporation after evaporation; it contributes to an increase in the amount of sugars. The resulting syrup is defended and it contains a concentration of Sugars in the dry residue up to 80%. The finished syrup can be used as a feed product.

The introduction of the proposed method of obtaining hydrolytic sugar will reduce the acreage of root crops; increase the productivity of farm animals by reducing the deficiency of sugar in the rations necessary for better absorption of nutrients by animals; use waste, cheap material as a raw material for the production of process chips; keep the environment from clogging; reduce the cost of collecting and burning logging waste and low-value shrub raw materials.

The proposed method provides a gain in cleaning time from harmful impurities. With the new method, the time for hot purging, and, therefore, purification of colloids of luminous substances is 0.5–1 h. The entire volume of the hydrolyzate is uniformly blown, therefore, the harmful substances are enlarged and Coagulated quickly and throughout the volume.

Claims (2)

1. A method of obtaining feed hydrolysis sugar, including. mozakidny hydrolysis of wood waste cooling hydrolyzer with 5 the subsequent separation of lignin and the processing of the hydrolyzate of the paths of neutronization, sludge and evaporation, characterized in that, in order to intensify the process and improve 0 the quality of the feed product obtained, after cooling, purging the hydrolyzate with steam, filtering and cooling with evaporation (furrol and acid condensate vapors), the neutralization of the hydrolyzate is carried out twice with suction to pI 3.54, 0 and after evaporation to pH 4, 5-5,5 with intermediate filtration and heating by blowing off steam, and after evaporation the neutralized hydrolytic acid is additionally defended. 2. The method according to claim 1, which is also distinguished by the fact that the selected condesates conducts the lignin to be permed. follow using it for 5 acid waste hydrolysis, and treated lignin as a filter for the hydrolyzate. I Sources of information, taken into account in the examination- 1. Kotovsky A.V. Wood as a feedstuff. L., 1934, p. 37-38. 2, USSR author's certificate; 698605, class A 23 K 1 / 12,1977 five