SU1551726A1 - Device for condensation of microorganism suspension - Google Patents

Abstract

The invention relates to the microbiological industry, more specifically to installations for thickening a suspension of microorganisms. The purpose of the invention is to increase the degree of thickening of the suspension. The installation contains piping-connected separators, a centrate collector 3 and a collection of microorganism concentrate. The fungus collector 3 is provided with a microorganism coagulation device installed inside it, consisting of a cone-shaped casing 10 of a non-magnetic material facing vertically down, placed in the case 10 of the electromagnet 11, and a nozzle 12 installed under the cone-shaped case 10. A sleeve 13 is placed around the case 10. changing the direction of flow of the centrifuge, the outer surface of which has a conductive coating 14. The installation provides a more complete isolation of microorganisms from the suspension due to their preliminary coag tion l before separation. 1 Cp, 2 Il.

Description

The invention relates to the microbiological industry, to installations for concentrating a suspension of microorganisms.

The purpose of the invention is to increase the degree of thickening of the suspension of microorganisms.

FIG. 1 shows a diagram of an installation for thickening a suspension of microorganisms; in fig. 2 - node I on a longitudinal section.

The plant for thickening a suspension of microorganisms contains separators 1 and 2, a collector 3 of centrate, connected in the upper part by pipeline 4 with separator 1 and in the lower part - by pipeline 5 with separator 2, collection 6 of suspension concentrate connected by pipeline 7 with separator 1 and pipeline 8 s the separator 2. The fugate collector 3 is equipped with a device 9 installed inside it for coagulation of microorganisms consisting of a cone-shaped casing 10 of a non-magnetic material, turned upside down, placed in the casing 10 of electromagnet 1 1 and a nozzle 12 for the supply of a centrifuge installed below the cone-shaped casing 10, the outlet of which is located coaxially with the top of this casing, and the nozzle 12 is connected by a pipe 4 to a separator 1. A hemispherical guide 13 of non-magnetic material is placed around the casing 10 to change the direction flow of centrate, the outer surface of which has a conductive coating 14, made in the form of a grid.

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Separator 1 is connected by pipeline 15 to fermenters 16. Separator 2 is equipped with pipeline 17 for removal of the clarified suspension from it, and collection 6 of the suspension concentrate has pipeline 18 for removal of condensate of microorganisms for further processing.

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The installation works as follows.

The initial suspension of microorganisms from the fermenters 16 is fed through line 15 to separator 1. in which the suspension is subjected to concentration and flows through line 7 to collection 6 of suspension concentrate.

At this stage of separation, the thickening of the suspension of microorganisms is incomplete, and the clarified suspension, which is removed from the separator 1, contains a significant amount of microorganisms. To improve and more thoroughly thicken the microorganisms in the clarified suspension, the latter is fed through conduit 4 to collector 3 of fugate, to device 9 for coagulation of microorganisms. In the device 9, under the action of an electromagnet 11, a magnetic field is created, which acts on the microorganisms and contains dispersive impurities in the suspension, which leads to coagulation of all particles in the liquid.

The process of coagulation of microorganisms, along with the action of a magnetic field on them, also occurs due to hydrodynamic forces, which arise due to a 180 ° change in the direction of the flow of the suspension When it moves from the outlet nozzle 12 to the cone-shaped casing 10 and further along the inner surface of the spherical direction 13.

When a suspension of an electromagnetic field created by an electromagnet 11 is simultaneously applied so that the direction of the gradient of field strength in the space between the cone-shaped casing 10 and the magnetic conductive coating 14 coincides with the direction of change of the suspension flow i-velocity vector, the microorganisms coagulate.

Due to the fact that the surface area of the end of the core of the electromagnet 11 is less than the area of the coating 14, the intensity of the magnetic field at the point of contact between the flow of the suspension and the top of the cone-shaped casing 10 is much greater than the intensity of the floor near the coating 14.

Thus, when the flow of the suspension flows along the cone-shaped casing 10 and further along the inner surface of the suspension guide 13 passes through a highly stressed and then weakly stressed electromagnetic field, the direction of the gradient of the intensity of the field along the curve from the top of the casing 10 to the peripheral part a guide 13, where the intensity is the smallest, with the direction of change of the suspension flow velocity vector.

Such an organization of simultaneous processing of the suspension in a significant gradient of the magnetic field and the maximum change in the flow velocity vector at the site of action of the magnetic field leads to an intensification of the effect on the suspension of both factors, magnetic and hydrodynamic. As a result, the likelihood of coagulation processes of the dispersion phase in a suspension increases, in which, among other things, the microorganic suspensions contain target microorganisms.

The coagulated processing of the clarified suspension from the centrate of the centrate of the centrifuge is then fed via pipeline 5 to the second separator 2, in which the second stage of concentration of the suspension in the field of centrifugal forces takes place. The concentrate after the second stage of concentration through the pipeline 8 is collected in the collector 6, and the secondary clarified suspension is discharged into the sewage system for transfer to biochemical purification.

The concentrate collected in collector 6 after both stages of concentration

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served on the next stage of the production of the finished product, such as spray drying.

The implementation of the condensation of microbiological suspensions in the proposed installation allows to intensify the process of coagulation of the solid phase in the clarified suspension by organizing the combined effect of several coagulation-stimulating factors on it, resulting in an increased degree of concentration and isolation of the target microorganisms from the clarified suspension, which leads to an increase output of finished products.

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Claims (2)

1. A plant for thickening a suspension of microorganisms, containing separators connected by pipelines, a centrifuge collection and a collection of microorganism concentrate, characterized in that, in order to increase the degree of concentration of the suspension, the collection of centrate is equipped with a microorganism coagulation device installed inside it consisting of a cone-shaped microorganism the casing of a non-magnetic material, facing the top downwards, placed in the casing of the electromagnet and installed under the conical casing of the nozzle for the supply of a centrifuge, the output hole TIFA is disposed coaxially with the apex of the casing, the latter is placed around the guide poJrysfericheska of resilient nonmagnetic material for changing the direction of flow of supernatant, the outer surface of which has a conductive coating, 2. Installation according to claim, characterized in that the conductive coating of the guide is made in the form of a grid. with cs -one t Editor N. Gunko Compiled by N. Osipov Tehred L. Serdyukova Proofreader N. Revska Order 308 Circulation 486 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 g 4J " tt io - & No Subscription