SU1641880A1 - Method for beer filtration - Google Patents

Abstract

The invention relates to the brewing industry, in particular to methods for filtering beer. The purpose of the invention is to improve the quality of beer and its durability during storage. The method includes the pre-formation of a precoat layer of silica gel on the filter support wall, introducing into the beer stream before filtering an aqueous suspension of kieselguhr with a particle size of 2-15 μm, seed yeast in an amount that ensures their concentration up to 150-200 thousand yeast cells in 1 ml unfiltered beer, and passing it through the precoat layer. 1 tab.

Description

The invention relates to the brewing industry, in particular, to a method for filtering beer through an alluvial deposit layer.

,, The aim of the invention is to improve the quality of beer and its durability during storage.

The method is carried out as follows.

A filter layer is washed onto the filter base in two stages: the first precoat layer of coarse kieselgur, for example A, at the rate of 0.5-0.8 kg per 1 mA of filter surface area, the second layer is washed at the rate of 0.6-0.9 kg per 1 m2 filter surface area.

After forming the alluvial silica gel in the filter mixer, an aqueous suspension of fine kieselgur is prepared, for example B, with an average equivalent particle diameter of 2-15 μm in a ratio of kieselguhr and water 1: 4, at the rate of adding 100-120 g of kieselgur to 1 ml of unfiltered beer fed to the filter. Thick seed yeast is added to the resulting suspension at the rate of 1.5-5 ml per 1 kg of kieselguhr, which corresponds to a concentration of 150-200 thousand yeast cells in 1 ml. When filtered through the alluvial layer, the flow of unfiltered beer supplied to the filter is pumped. - rum, make kieselguro-yeast suspension at the rate of 100-120 g of kieselgur and 0.15-0.5 ml of thick yeast on the GT of ikn beer. Yeast cells

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together with diatomaceous earth, falling on the filter, form a layer of sediment, which performs an additional filtering function by sorption of finely dispersed protein-colloidal particles on the surface of the yeast cells, while the clarification of the beer improves by 0.3-0.5 units of VVS.

Example 1. For filtering beer containing 20.0 thousand yeast cells in 1 ml, a frame precoat filter with a filtering surface area of 23.5 mg was used. The alluvium layer is formed on the support board in two stages by separating the aqueous suspension of diatomaceous earths A and B.

It is used for the first layer of kieselgur A at the rate of 0.8 kg per 1 m2 of the surface area of the filter. For the second alluding layer (brightening) - diatomaceous earth 0.9 kg / m2. After the precoat layers are formed in the filter mixer, an aqueous kieselguhr-yeast suspension is prepared in a ratio of 240 kg of water, 60 kg of kieselguhr B with an average equivalent particle diameter of 2-15 µm and 270 ml of thick seed yeast, which is consistent with the calculation; 1 kg of kieselguhr - 4.5 ml of thick yeast.

The obtained kieselguro-yeast suspension is injected into the stream of beer fed to the filter from 100 g of kieselguhr and 0.45 kp of thick yeast per 1 ml of beer by means of a dosing pump, and thus the concentration of fractions is brought to a content of 200 thousand cells in 1 ml of beer. As a result of the sorption of fine particles of the solid phase, the clarification of the filtered beer is improved by 0.3 UE.

Example 2. For filtration, take a beer containing in 1 ml 70 thousand yeast cells.

The diatomite diatomite layers are formed on the support cardboard as in Example 1.

After the precoat layers are formed in the mixer, an aqueous kieselguhr-yeast suspension is prepared in a ratio of 240 kg of water, 60 kg of kieselguhr and 192 kg of thick seed yeast, which corresponds to the calculation: per 1 kg of kieselguhr, 3.2 ml of thick yeast.

The obtained kieselguro-yeast suspension is introduced by a dosing pump into the stream of beer supplied to the filter at the rate of 100 g of kieselguhr and

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0.32 ml of thick yeast per 1 ml of beer and thus bring the concentration of yeast to a content of 200 thousand cells per 1 ml of beer. As a result of the sorption of fine particles of the solid phase of beer by yeast cells, the clarification of the filtered beer is improved by 0.3-0.5 UE.

Example 3. For filtration, take a beer containing in 1 ml of 120 thousand yeast cells. The alluvial layers are formed similarly to Example 1. After the alluvial layers are formed in the mixer, an aqueous kieselguro-yeast suspension is prepared: 240 kg of water, 60 kg of kieselguhr and 120 ml of thick yeast, which corresponds to the calculation: for 1 kg of kieselguhr, 2 ml of thick

0 yeast.

The obtained kieselguro-yeast suspension is injected with a dosing pump into the stream of beer supplied to the filter, at the rate of 100 g of kieselguhr and O, 2 ml of thick yeast per 1 ml of beer. Thus, the concentration of yeast in beer is adjusted to a content of 200 thousand cells per ml. As a result of the sorption of fine yeast cells

0 particles of the solid phase of beer (clarification, improved by 0.3-0.5 units of EVS.

Characteristics of beer according to the known and proposed methods are presented in the table.

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The proposed method allows to improve the quality of beer and its storage stability.

Claims (1)

0 claims Sprasob filtering beer, forming the alluvial layer from kieselguhr, the introduction of water 5 suspensions of kieselguhr into the stream of unfiltered beer and passing it through the alluvial deposit, characterized in that, in order to improve the quality of beer and its persistence during storage, an aqueous suspension of diatomaceous earth is mixed with seed yeast in an amount that provides 150 -200 thousand cl. in 1 ml of unfiltered beer, while in the aqueous suspension diatomaceous earth uses an average particle diameter of 2-15 microns. Indicators Beer clarification method Turbidity of beer, unit EVS0,7 Bacteria content, cells / ml1000 Nitrogenous substances of the high molecular weight fraction A (according to Lundin), mg / 100 mg 13.8 Limit of sedimentation, ml (N114) 2804/10 ° Resistance, day 10-12 Filtering through the diatomite diatomaceous earth Proposed 0.4 210 10.3 9.8 14-16