Decoloring membrane system applied to production of L-homoserine

Abstract

The utility model discloses a decolorizing membrane system applied to production of L-homoserine, and belongs to the technical field of decolorizing membranes. The problems of product loss and high cost in the prior art are solved. According to the technical scheme, the left side of a first pipeline is connected with the bottom of a first ceramic membrane clear liquid tank, and the right side of the first pipeline is connected with a decolorizing membrane system; the left side of a fifth pipeline is connected with the first pipeline, the right side of the fifth pipeline is connected with a thallus storage tank, the left side of a sixth pipeline is connected with a circulating water inlet tank, the right side of the sixth pipeline is connected with a circulating water return tank, and the sixth pipeline is provided with a condenser. After the device is improved, the product separation efficiency is improved, the energy consumption is reduced, energy conservation and emission reduction are facilitated, the occupied area is reduced, efficient production is realized in a limited space, the operation temperature is lower, the device is suitable for temperature-sensitive materials, and the activity and the stability of heat-sensitive substances are protected.

Description

Technical Field

[0001] This utility model relates to the field of decolorization membrane technology, specifically a decolorization membrane system applied to the production of L-homoserine. Background Technology

[0002] In traditional decolorization processes, ceramic membrane technology offers highly efficient separation capabilities. Ceramic membranes possess a uniform microporous structure, allowing for the fabrication of membranes with varying pore sizes to achieve efficient separation. Their uniform pore size distribution effectively separates impurities and particles from solutions, ensuring high-efficiency filtration. They also exhibit excellent high-temperature and high-pressure resistance, enabling operation under extreme conditions. Furthermore, their specially treated surface provides excellent chemical stability, resisting corrosion from various acids, alkalis, salts, and other corrosive substances. Finally, they demonstrate biocompatibility and antifouling properties; the specially treated ceramic membrane surface ensures good biocompatibility, making them suitable for the separation and extraction of biological products. Furthermore, ceramic membranes are not easily corroded by chemical substances and have excellent anti-fouling capabilities, enabling them to maintain high-efficiency separation performance over a long period. They possess high mechanical strength and wear resistance, allowing them to withstand high-pressure and high-intensity operating conditions, ensuring stable operation over extended periods. They are easy to maintain and regenerate; the surface design of ceramic membranes makes them easy to clean, and their performance can be restored and their service life extended through simple cleaning methods. They have wide applicability; whether in vacuum or high-pressure systems, ceramic membranes can meet various separation requirements, demonstrating their broad applicability. The ceramic membrane separation process has low energy consumption and is a dry separation technology that requires no solvents and produces no secondary pollution.

[0003] Existing methods for improving the purity of ceramic membrane cleaning solutions all involve using activated carbon to remove color and impurities from the solution. This is achieved by heating and mixing the ceramic membrane cleaning solution with activated carbon, which then removes impurities and color from the solution. While this method can remove color and impurities from the ceramic membrane cleaning solution, it also causes some homoserine products to be adsorbed onto the activated carbon and cannot be removed, resulting in the loss of the target product. Furthermore, it generates a large amount of waste activated carbon that is not recyclable.

[0004] Therefore, there is an urgent need to propose a decolorization membrane system for the production of L-homoserine in order to solve the problems of product loss and high cost in the existing technology. Utility Model Content

[0005] In view of the above facts, in order to solve the problems of product loss and high cost in the prior art, this utility model designs a decolorization membrane system for the production of L-homoserine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A decolorizing membrane system for L-homoserine production includes: a ceramic membrane clear liquid tank, a decolorizing membrane system, a decolorizing membrane safety filter, a decolorizing membrane feed pump, a condenser, a ceramic membrane clear liquid tank, a bacterial cell storage tank, a circulating water inlet tank, a circulating water return tank, a ceramic membrane clear liquid inlet tank, a decolorizing liquid to concentrate membrane tank, a first drain tank, and a second drain tank.

[0008] The first pipeline connects to the bottom of the ceramic membrane clear liquid tank No. 1 on the left and to the decolorization membrane system on the right. The first pipeline is sequentially equipped with the ceramic membrane clear liquid No. 1 discharge valve, the decolorization membrane pump inlet valve, the decolorization membrane safety filter, the decolorization membrane feed pump, the decolorization membrane pump check valve, the decolorization membrane feed regulating valve, the first decolorization membrane feed valve, the condenser, and the second decolorization membrane feed valve.

[0009] The second pipeline connects to the bottom of the ceramic membrane clear liquid tank No. 2 on the left and to the first pipeline on the right. The right connection point is between the inlet valve of the decolorizing membrane pump and the decolorizing membrane safety filter. The ceramic membrane clear liquid No. 2 discharge valve is installed on the second pipeline.

[0010] The fifth pipe is connected to the first pipe on the left, with the left connection point between the decolorizing membrane feed regulating valve and the first decolorizing membrane feed valve. The fifth pipe is connected to the bacterial storage tank on the right, and a bacterial tank valve is installed on the fifth pipe.

[0011] The sixth pipeline is connected to the circulating water inlet tank on the left and the circulating water return tank on the right. The decolorizing film cooler inlet valve, decolorizing film cooler inlet regulating valve, condenser, and decolorizing film cooler return valve are installed in sequence on the sixth pipeline.

[0012] The seventh pipeline is connected to the ceramic membrane clear liquid supply tank on the left and to the top of the ceramic membrane clear liquid tank No. 2 on the right. The second ceramic membrane clear liquid inlet valve and the second ceramic membrane clear liquid inlet manual valve are installed in sequence on the seventh pipeline.

[0013] The eighth pipe is connected to the seventh pipe on the left. The left connection point is between the ceramic membrane clear liquid inlet tank and the ceramic membrane clear liquid inlet valve. The right side is connected to the top of the ceramic membrane clear liquid tank No. 1. The eighth pipe is installed with the first ceramic membrane clear liquid inlet valve and the first ceramic membrane clear liquid inlet manual valve in sequence.

[0014] The ninth pipeline is connected to the top of the ceramic membrane clear liquid tank No. 1 on the left and to the top of the decolorization membrane system on the right. The ninth pipeline is sequentially equipped with the first decolorization liquid return valve, the second decolorization liquid return valve, and the decolorization membrane pressure regulating valve.

[0015] The tenth pipe is connected to the top of the ceramic membrane clear liquid tank No. 2 on the left and to the ninth pipe on the right. The right connection point is between the second decolorizing liquid reflux valve and the decolorizing membrane pressure regulating valve. The third decolorizing liquid reflux valve and the fourth decolorizing liquid reflux valve are installed on the tenth pipe in sequence.

[0016] The left side of the eleventh pipe connects to the decolorizing membrane system, and the right side connects to the decolorizing solution to the concentration membrane tank.

[0017] The top of the first ceramic membrane clear liquid tank is connected to the first empty tank, and the top of the second ceramic membrane clear liquid tank is connected to the second empty tank.

[0018] Furthermore: The third pipeline is connected to the first pipeline, with the connection point between the ceramic membrane clear liquid tank No. 1 and the ceramic membrane clear liquid discharge valve No. 1. The discharge valve of the ceramic membrane clear liquid tank No. 1 is installed on the third pipeline.

[0019] Furthermore: the fourth pipeline connects to the second pipeline, with the connection point between the ceramic membrane clear liquid tank No. 2 and the ceramic membrane clear liquid discharge valve No. 2. The fourth pipeline is equipped with the discharge valve of the ceramic membrane clear liquid tank No. 2.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model has low energy consumption. Due to the low operating temperature and the fact that it mainly uses pressure as the driving force, the energy consumption of the decolorizing membrane is relatively low. It also solves the problem of solid waste generated by decolorizing with activated carbon, which helps to save energy and reduce emissions.

[0022] 2. This utility model has high separation efficiency, a large effective area of ​​the decolorizing membrane, and fast filtration speed, which can achieve efficient separation and concentration and improve product yield.

[0023] 3. The separation process of this utility model does not involve phase change. During the decolorization and impurity removal process, the liquid does not undergo phase change, that is, the fermentation broth is not heated. This helps to protect the activity and stability of heat-sensitive substances and avoid damage to the materials caused by high temperature.

[0024] 4. The operating conditions of this utility model are mild. The decolorizing membrane is usually operated at room temperature or a low temperature, which is suitable for temperature-sensitive materials, such as biological agents and pharmaceuticals.

[0025] 5. This utility model has a high degree of automation. The decolorization film system is usually equipped with an advanced automatic control system, which can realize remote monitoring and adjustment, improve production efficiency and reduce labor costs.

[0026] 6. This utility model occupies a small area and has a compact decolorization film system, which is conducive to achieving efficient production in a limited space. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] In the diagram: 1-Ceramic membrane clear liquid tank No. 1, 2-Decolorization membrane system, 3-Ceramic membrane clear liquid No. 1 discharge valve, 4-Decolorization membrane pump inlet valve, 5-Decolorization membrane safety filter, 6-Decolorization membrane feed pump, 7-Decolorization membrane pump check valve, 8-Decolorization membrane feed regulating valve, 9-First decolorization membrane feed valve, 10-Condenser, 11-Second decolorization membrane feed valve, 12-Ceramic membrane clear liquid tank No. 2, 13-Ceramic membrane clear liquid No. 2 discharge valve, 14-Ceramic membrane clear liquid tank No. 1 discharge valve, 15-Ceramic membrane clear liquid tank No. 2 discharge valve, 16-Bacterial cell storage tank, 17-Bacterial cell removal tank valve, 18-Circulating water inlet tank, 19-Circulating water storage tank. 20 - Water return tank; 21 - Decolorizing membrane cooler inlet valve; 22 - Decolorizing membrane cooler inlet regulating valve; 23 - Decolorizing membrane cooler return valve; 24 - Ceramic membrane clear liquid inlet tank; 25 - Second ceramic membrane clear liquid inlet valve; 26 - Second ceramic membrane clear liquid inlet manual valve; 27 - First ceramic membrane clear liquid inlet valve; 28 - First decolorizing liquid reflux valve; 29 - Second decolorizing liquid reflux valve; 30 - Decolorizing membrane pressure regulating valve; 31 - Third decolorizing liquid reflux valve; 32 - Fourth decolorizing liquid reflux valve; 33 - Decolorizing liquid to concentration membrane tank; 34 - First vent tank; 35 - Second vent tank. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] In this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0036] Example 1: A decolorizing membrane system for L-homoserine production in this example includes: a ceramic membrane clear liquid tank 1, a decolorizing membrane system 2, a decolorizing membrane safety filter 5, a decolorizing membrane feed pump 6, a condenser 10, a ceramic membrane clear liquid tank 2, a bacterial cell storage tank 16, a circulating water inlet tank 18, a circulating water return tank 19, a ceramic membrane clear liquid inlet tank 23, a decolorizing liquid to concentrate membrane tank 33, a first empty tank 34, and a second empty tank 35.

[0037] The first pipeline connects to the bottom of the ceramic membrane clear liquid tank 1 on the left and to the decolorization membrane system 2 on the right. The first pipeline is sequentially equipped with the following components: ceramic membrane clear liquid discharge valve 3, decolorization membrane pump inlet valve 4, decolorization membrane safety filter 5, decolorization membrane feed pump 6, decolorization membrane pump check valve 7, decolorization membrane feed regulating valve 8, first decolorization membrane feed valve 9, condenser 10, and second decolorization membrane feed valve 11.

[0038] The second pipeline is connected to the bottom of the ceramic membrane clear liquid tank 12 on the left and to the first pipeline on the right. The right connection point is between the decolorizing membrane pump inlet valve 4 and the decolorizing membrane safety filter 5. The ceramic membrane clear liquid discharge valve 13 is installed on the second pipeline.

[0039] The fifth pipeline is connected to the first pipeline on the left side, with the left connection point between the decolorizing membrane feed regulating valve 8 and the first decolorizing membrane feed valve 9. The fifth pipeline is connected to the bacterial storage tank 16 on the right side, and a bacterial tank valve 17 is installed on the fifth pipeline.

[0040] The sixth pipeline is connected to the circulating water inlet tank 18 on the left and the circulating water return tank 19 on the right. The sixth pipeline is installed with the decolorizing film cooler inlet valve 20, the decolorizing film cooler inlet regulating valve 21, the condenser 10, and the decolorizing film cooler return valve 22 in sequence.

[0041] The seventh pipeline is connected to the ceramic membrane clear liquid inlet tank 23 on the left and to the top of the ceramic membrane clear liquid tank No. 2 12 on the right. The seventh pipeline is equipped with the second ceramic membrane clear liquid inlet valve 24 and the second ceramic membrane clear liquid inlet manual valve 25 in sequence.

[0042] The eighth pipeline is connected to the seventh pipeline on the left. The left connection point is between the ceramic membrane clear liquid inlet tank 23 and the ceramic membrane clear liquid inlet valve 24. The right side is connected to the top of the ceramic membrane clear liquid tank 1. The eighth pipeline is installed with the first ceramic membrane clear liquid inlet valve 26 and the first ceramic membrane clear liquid inlet manual valve 27 in sequence.

[0043] The ninth pipeline is connected to the top of the ceramic membrane clear liquid tank 1 on the left and to the top of the decolorizing membrane system 2 on the right. The ninth pipeline is sequentially equipped with the first decolorizing liquid return valve 28, the second decolorizing liquid return valve 29, and the decolorizing membrane pressure regulating valve 30.

[0044] The tenth pipe is connected to the top of the ceramic membrane clear liquid tank No. 2 12 on the left and to the ninth pipe on the right. The right connection point is between the second decolorizing liquid return valve 29 and the decolorizing membrane pressure regulating valve 30. The third decolorizing liquid return valve 31 and the fourth decolorizing liquid return valve 32 are installed on the tenth pipe in sequence.

[0045] The left side of the eleventh pipe is connected to the decolorization membrane system 2, and the right side is connected to the decolorization liquid to the concentration membrane tank 33.

[0046] The top of the ceramic membrane clear liquid tank 1 is connected to the first empty tank 34, and the top of the ceramic membrane clear liquid tank 12 is connected to the second empty tank 35.

[0047] More specifically: the third pipeline is connected to the first pipeline, and the connection point is between the ceramic membrane clear liquid tank 1 and the ceramic membrane clear liquid discharge valve 3. The ceramic membrane clear liquid tank 1 discharge valve 14 is installed on the third pipeline.

[0048] More specifically: the fourth pipe is connected to the second pipe, and the connection point is between the ceramic membrane clear liquid tank No. 2 12 and the ceramic membrane clear liquid discharge valve No. 2 13. The fourth pipe is equipped with the ceramic membrane clear liquid tank No. 2 discharge valve 15.

[0049] Example 2: This example describes a decolorizing membrane system applied to the production of L-homoserine. The specific requirements for the decolorizing membrane are as follows:

[0050] raw material liquid 150 <![CDATA[m 3 / d]]> Filtering time 20 Hour raw material liquid 7.5 <![CDATA[m 3 / h]]> Permeable liquid 6.75 <![CDATA[m 3 / h]]> Design permeation flux 10 LMH Theoretical calculation of total membrane area 675 <![CDATA[m 2 ]]> Single membrane area 33.8 <![CDATA[m 2 ]]> Theoretical calculation of membrane module quantity 20 branch Actual number of membrane modules 20 branch

[0051] More specifically: the temperature of the decolorizing membrane feed tank and the ceramic membrane clear liquid tank is below 40 degrees Celsius, and a lower limit alarm for the liquid level is set. At the same time, the liquid level alarm is interlocked with the decolorizing membrane feed pump and the high-pressure pump to avoid damage to the system.

[0052] More specifically: the equipment's membrane module inlet and outlet pressure detection and control; the membrane module inlet and outlet pressure is displayed using a diaphragm pressure gauge, and the pressure data is transmitted remotely using a pressure transmitter. The pressure signal is uploaded to the PLC system. When the membrane module inlet pressure is high, the system will issue an alarm. If the pressure is severely too high, the equipment will automatically shut down. When the membrane module outlet pressure is low, the system will issue an alarm. If the pressure is severely too low, the equipment will automatically shut down.

[0053] More specifically: the temperature of the main unit is 40-50 degrees Celsius.

[0054] More specifically: interlocking and control of the transfer pump and the high-pressure pump; interlocking the transfer pump and the high-pressure pump, the high-pressure pump can only be started after the transfer pump has been running for a certain period of time, and the high-pressure pump must not be started when the transfer pump is stopped to avoid dry running and damage; frequency conversion regulation of the transfer pump, high-pressure pump and cleaning pump; the cleaning pump can only be started when the transfer pump and the high-pressure pump are stopped.

[0055] More specifically: the system runs for 20 hours, and the cleaning process takes 4 hours.

[0056] More specifically: After the ceramic membrane clear liquid is pumped from the ceramic membrane clear liquid tank into the decolorization membrane system, the decolorization membrane system starts to operate. The material first passes through the safety filter to intercept larger particles of foreign matter remaining in the ceramic membrane clear liquid, protecting the pump blades and the decolorization membrane. Then it enters the decolorization membrane for separation and purification. The decolorization membrane retains pigments and residual proteins and other impurities in the ceramic membrane clear liquid. The decolorized liquid then continues to flow back to the decolorization membrane feed tank and is circulated through the decolorization membrane system for decolorization until the process requirements are met.

[0057] More specifically: By using a decolorizing membrane instead of traditional activated carbon for decolorization, the company's investment in solid waste treatment has been reduced, and the product loss caused by activated carbon adsorption has also been resolved. Based on the calculation that 50 kg of activated carbon is required per cubic meter of ceramic membrane clear liquid to meet the decolorization requirements, 1.75 tons of activated carbon are used per day. At a price of 7,000 yuan per ton of activated carbon, this saves 12,250 yuan per day and 4.471 million yuan per year (the above data does not include the cost of treating waste activated carbon).

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; as long as there is no structural conflict, the features in the specific embodiments disclosed in this application can be combined with each other in any way, and will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

[0059] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A decolorizing membrane system for L-homoserine production, characterized in that, Includes ceramic membrane clear liquid tank No. 1 (1), decolorizing membrane system (2), decolorizing membrane safety filter (5), decolorizing membrane feed pump (6), condenser (10), ceramic membrane clear liquid tank No. 2 (12), bacterial cell storage tank (16), circulating water inlet tank (18), circulating water return tank (19), ceramic membrane clear liquid inlet tank (23), decolorizing liquid to concentrate membrane tank (33), first empty tank (34), and second empty tank (35); The first pipeline is connected to the bottom of the ceramic membrane clear liquid tank (1) on the left and to the decolorization membrane system (2) on the right. The first pipeline is installed with the ceramic membrane clear liquid discharge valve (3), the decolorization membrane pump inlet valve (4), the decolorization membrane safety filter (5), the decolorization membrane feed pump (6), the decolorization membrane pump check valve (7), the decolorization membrane feed regulating valve (8), the first decolorization membrane feed valve (9), the condenser (10), and the second decolorization membrane feed valve (11). The second pipeline is connected to the bottom of the ceramic membrane clear liquid tank No. 2 (12) on the left and to the first pipeline on the right. The right connection point is between the decolorizing membrane pump inlet valve (4) and the decolorizing membrane safety filter (5). The ceramic membrane clear liquid discharge valve No. 2 (13) is installed on the second pipeline. The fifth pipeline is connected to the first pipeline on the left side, with the left connection point between the decolorizing membrane feed regulating valve (8) and the first decolorizing membrane feed valve (9). The fifth pipeline is connected to the bacterial cell storage tank (16) on the right side, and a bacterial cell tank valve (17) is installed on the fifth pipeline. The sixth pipeline is connected to the circulating water inlet tank (18) on the left and the circulating water return tank (19) on the right. The sixth pipeline is installed with the decolorizing film cooler inlet valve (20), the decolorizing film cooler inlet regulating valve (21), the condenser (10), and the decolorizing film cooler return valve (22) in sequence. The seventh pipeline is connected to the ceramic membrane clear liquid inlet tank (23) on the left and to the top of the ceramic membrane clear liquid tank No. 2 (12) on the right. The seventh pipeline is installed with the second ceramic membrane clear liquid inlet valve (24) and the second ceramic membrane clear liquid inlet manual valve (25) in sequence. The eighth pipe is connected to the seventh pipe on the left side. The left connection point is between the ceramic membrane clear liquid inlet tank (23) and the ceramic membrane clear liquid inlet valve (24). The right side is connected to the top of the ceramic membrane clear liquid tank No. 1 (1). The eighth pipe is installed with the first ceramic membrane clear liquid inlet valve (26) and the first ceramic membrane clear liquid inlet manual valve (27) in sequence. The ninth pipeline is connected to the top of the ceramic membrane clear liquid tank (1) on the left and to the top of the decolorization membrane system (2) on the right. The ninth pipeline is installed with the first decolorization liquid return valve (28), the second decolorization liquid return valve (29), and the decolorization membrane pressure regulating valve (30) in sequence. The tenth pipe is connected to the top of the ceramic membrane clear liquid tank No. 2 (12) on the left and to the ninth pipe on the right. The right connection point is between the second decolorizing liquid return valve (29) and the decolorizing membrane pressure regulating valve (30). The third decolorizing liquid return valve (31) and the fourth decolorizing liquid return valve (32) are installed on the tenth pipe in sequence. The left side of the eleventh pipeline is connected to the decolorization membrane system (2), and the right side is connected to the decolorization liquid to the concentration membrane tank (33); The top of the first empty tank (34) of the ceramic membrane clear liquid tank No. 1 is connected to the first empty tank (34), and the top of the second empty tank (35) of the ceramic membrane clear liquid tank No. 2 is connected to the second empty tank (35).

2. The decolorizing membrane system for L-homoserine production according to claim 1, characterized in that: The third pipeline connects to the first pipeline, with the connection point between the ceramic membrane clear liquid tank No. 1 (1) and the ceramic membrane clear liquid discharge valve No. 1 (3). The ceramic membrane clear liquid tank No. 1 discharge valve (14) is installed on the third pipeline.

3. The decolorizing membrane system for L-homoserine production according to claim 1, characterized in that: The fourth pipe is connected to the second pipe, and the connection point is between the ceramic membrane clear liquid tank No. 2 (12) and the ceramic membrane clear liquid discharge valve No. 2 (13). The fourth pipe is equipped with the ceramic membrane clear liquid tank No. 2 discharge valve (15).

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