Treatment system for polypeptide product production wastewater

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses a polypeptide product production wastewater treatment system which comprises an anaerobic tank, an aerobic tank, a physicochemical tank, a sedimentation tank, a feeding unit, a conveying assembly, a control unit and a plurality of monitoring assemblies, according to the device disclosed by the utility model, in an anaerobic tank, firstly, amino acid synthetic products and part of chemical reagents are decomposed into salts containing C elements, N elements and Cl elements; in the aerobic tank, salt containing C elements and N elements is oxidized and decomposed into carbon dioxide and nitrogen, pypocholoride is oxidized into chlorine salt, the chlorine salt is precipitated into solid substances in the physicochemical device and the precipitation device, and the solid substances are removed, so that a relatively good treatment effect is achieved; besides, a feeding unit, a conveying assembly, a control unit and a plurality of monitoring assemblies are arranged, monitoring data of each on-line monitoring instrument is timely transmitted back to the control unit, the adding amount of the medicament feeding device is adjusted in real time, the optimization of system operation conditions is realized, wastewater treatment equipment is simplified, and the management cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a treatment system for wastewater produced in the production of polypeptide products. Background Art

[0002] Polypeptide products are widely used in the fields of clinical medicine, health food, beauty and health preservation, etc. Polypeptides are formed by dehydration condensation of multiple amino acid molecules. Therefore, a large amount of wastewater containing amino acid raw materials and other chemical reagents will be discharged during the production process of polypeptides. If this wastewater is not treated, it will pollute the ecological environment and may also threaten the safety and health of humans.

[0003] Currently, the most commonly used methods for treating the above wastewater are biochemical method and membrane separation method. The biological method purifies the wastewater through processes such as bacterial separation, yeast production, anaerobic fermentation, and aerobic aeration. It has the advantages of low cost and no secondary pollution, but the treatment effect is poor, and it contains multiple bacterial components, and the process equipment is cumbersome. Once pollution occurs, the entire process cannot be implemented; while the membrane separation method mainly includes methods such as electrodialysis and ultrafiltration. Due to its advantages of practicality, adjustability, energy saving, and simple process, it has been widely used. However, the investment and operation costs of membrane equipment are relatively high, it is prone to clogging, and requires high-level pretreatment, regular chemical cleaning, and supporting technologies such as concentrate treatment, and it is also prone to secondary pollution.

[0004] Therefore, how to optimize and improve the treatment system for wastewater produced in the production of polypeptide products to reduce the cost of wastewater treatment, simplify the steps of wastewater treatment, and improve the effect of wastewater treatment is one of the technical problems that need to be solved urgently in this field. Content of the Utility Model

[0005] In view of this, the utility model provides a treatment system for amino acid wastewater with low cost of wastewater treatment, simple steps of wastewater treatment, and good effect of wastewater treatment.

[0006] In the first aspect, the utility model provides a treatment system for wastewater produced in the production of polypeptide products, including an anaerobic tank, an aerobic tank, a physicochemical tank, a sedimentation tank, a feeding unit, a conveying component, a control unit, and several monitoring components;

[0007] The feeding unit includes an oxidant feeding device, an alkali solution feeding device, a coagulant feeding device, and a flocculant feeding device. The oxidant feeding device is connected to the anaerobic tank and the aerobic tank, the alkali solution feeding device is connected to the anaerobic tank and the aerobic tank, the coagulant feeding device is connected to the physicochemical tank, and the flocculant feeding device is connected to the sedimentation tank;

[0008] The conveying assembly is connected to the anaerobic tank, the aerobic tank, the physicochemical tank and the sedimentation tank, and is used to make the wastewater for polypeptide product production flow into the anaerobic tank, the aerobic tank, the physicochemical tank and the sedimentation tank in sequence;

[0009] The monitoring assembly includes a pH meter and an oxidation-reduction potential meter, and the monitoring assembly is arranged in each of the anaerobic tank, the aerobic tank, the physicochemical tank and the sedimentation tank;

[0010] The control unit is connected to the monitoring assembly, the conveying assembly, the oxidant feeding device, the lye feeding device, the coagulant feeding device and the flocculant feeding device.

[0011] In an optional embodiment, the oxidant feeding device includes an oxidant storage tank and an oxidant feeding pipeline. One end of the oxidant feeding pipeline is connected to the oxidant storage tank, and the other end of the oxidant feeding pipeline is connected to the anaerobic tank and the aerobic tank; a first solenoid valve is arranged on the oxidant feeding pipeline, and the first solenoid valve is connected to the control unit.

[0012] In an optional embodiment, the lye feeding device includes a lye storage tank and a lye feeding pipeline. One end of the lye feeding pipeline is connected to the lye storage tank, and the other end of the lye feeding pipeline is connected to the anaerobic tank and the aerobic tank; a second solenoid valve is arranged on the lye feeding pipeline, and the second solenoid valve is connected to the control unit.

[0013] In an optional embodiment, the coagulant feeding device includes a coagulant storage tank and a coagulant feeding pipeline. One end of the coagulant feeding pipeline is connected to the coagulant storage tank, and the other end of the coagulant feeding pipeline is connected to the physicochemical tank; a third solenoid valve is arranged on the coagulant feeding pipeline, and the third solenoid valve is connected to the control unit.

[0014] In an optional embodiment, the flocculant feeding device includes a flocculant storage tank and a flocculant feeding pipeline. One end of the flocculant feeding pipeline is connected to the flocculant storage tank, and the other end of the flocculant feeding pipeline is connected to the sedimentation tank; a fourth solenoid valve is arranged on the flocculant feeding pipeline, and the fourth solenoid valve is connected to the control unit.

[0015] In an alternative embodiment, the conveying assembly includes a first conveying pipe connecting the anaerobic tank and the aerobic tank, a second conveying pipe connecting the aerobic tank and the physicochemical treatment tank, and a third conveying pipe connecting the physicochemical treatment tank and the sedimentation tank. A fifth solenoid valve is provided on the first conveying pipe, a sixth solenoid valve is provided on the second conveying pipe, and a seventh solenoid valve is provided on the third conveying pipe. The fifth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve are all connected to the control unit.

[0016] In an alternative embodiment, the treatment system further includes an evaporation and condensation unit, which includes an evaporation and condensation device, a recycled water collection device, and a waste liquid collection device;

[0017] The water inlet of the evaporation and condensation device is connected to the water outlet of the sedimentation tank, the water outlet of the evaporation and condensation device is connected to the recycled water collection device, and the waste liquid outlet of the evaporation and condensation device is connected to the waste liquid collection device.

[0018] In an alternative embodiment, the treatment system further includes a waste residue treatment unit, which includes a filter press device and a waste solid collection device;

[0019] The inlet of the filter press device is connected to the slag discharge port of the sedimentation tank, the slag discharge port of the filter press device is connected to the waste solid collection device, and the water outlet of the filter press device is connected to the anaerobic tank and / or the aerobic tank.

[0020] In an alternative embodiment, the treatment system further includes a wastewater collection tank, and the water outlet of the wastewater collection tank is connected to the water inlet of the anaerobic tank.

[0021] In an alternative embodiment, the conveying assembly further includes a fourth conveying pipe connecting the sedimentation tank and the evaporation and condensation device, a fifth conveying pipe connecting the sedimentation tank and the filter press device, and a sixth conveying pipe connecting the wastewater collection tank and the anaerobic tank. An eighth solenoid valve is provided on the fourth conveying pipe, a ninth solenoid valve is provided on the fifth conveying pipe, and a tenth solenoid valve is provided on the sixth conveying pipe. The eighth solenoid valve, the ninth solenoid valve, and the tenth solenoid valve are all connected to the control unit.

[0022] Compared with the prior art, the technical solution of the present utility model has the following advantages:

[0023] The wastewater treatment system for polypeptide products provided by the present utility model includes an anaerobic tank, an aerobic tank, a physicochemical tank, a sedimentation tank, a feeding unit, a conveying assembly, a control unit, and several monitoring assemblies; the feeding unit includes an oxidant feeding device, an alkali solution feeding device, a coagulant feeding device, and a flocculant feeding device. The oxidant feeding device is connected to the anaerobic tank and the aerobic tank, the alkali solution feeding device is connected to the anaerobic tank and the aerobic tank, the coagulant feeding device is connected to the physicochemical tank, and the flocculant feeding device is connected to the sedimentation tank; the conveying assembly is connected to the anaerobic tank, the aerobic tank, the physicochemical tank, and the sedimentation tank for enabling the wastewater from polypeptide products production to flow into the anaerobic tank, the aerobic tank, the physicochemical tank, and the sedimentation tank in sequence; the monitoring assemblies include a pH meter and an oxidation-reduction potential meter, and monitoring assemblies are arranged in the anaerobic tank, the aerobic tank, the physicochemical tank, and the sedimentation tank; the control unit is connected to the monitoring assemblies, the conveying assembly, the oxidant feeding device, the alkali solution feeding device, the coagulant feeding device, and the flocculant feeding device. By sequentially arranging the anaerobic tank, the aerobic tank, the physicochemical tank, and the sedimentation tank, in the anaerobic tank, first, the amino acid synthesis products and some chemical reagents are decomposed into compounds containing C element, N element, and Cl element, and then further decomposed into salts containing C element, N element, and Cl element; in the aerobic tank, the salts containing C element and N element are further oxidized and decomposed into carbon dioxide and nitrogen, and the hypochlorite is oxidized into chloride salt. Finally, it is precipitated into solid substances in the physicochemical device and the sedimentation device and removed, achieving a better treatment effect; in addition, by setting the feeding unit, the conveying assembly, the control unit, and several monitoring assemblies, the monitoring data of each on-line monitor is immediately transmitted back to the control unit, and the dosing amount of the chemical reagent feeding device is adjusted in real time to optimize the operating conditions of the system, completely solving the drawbacks of manual dosing, simplifying the wastewater treatment equipment, and greatly reducing the management cost. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the system according to an embodiment of the present utility model;

[0026] Description of the Reference Numerals:

[0027] 1. Wastewater collection tank; 2. Anaerobic tank; 3. Aerobic tank; 4. Physicochemical treatment tank; 5. Sedimentation tank; 6. Control unit; 7. Oxidant storage tank; 8. Alkali solution storage tank; 9. Coagulant storage tank; 10. Flocculant storage tank; 11. pH meter; 12. Redox potential meter; 13. First solenoid valve; 14. Second solenoid valve; 15. Third solenoid valve; 16. Fourth solenoid valve; 17. Fifth solenoid valve; 18. Sixth solenoid valve; 19. Seventh solenoid valve; 20. Evaporation and condensation device; 21. Reclaimed water collection device; 22. Waste liquid collection device; 23. Filter press device; 24. Waste solid collection device; 25. Eighth solenoid valve; 26. Ninth solenoid valve; 27. Tenth solenoid valve. Detailed implementation manners

[0028] The following embodiments are provided to better understand the present utility model further, and are not limited to the described optimal implementation manner. They do not limit the content and protection scope of the present utility model. Any product that is the same as or similar to the present utility model obtained by anyone under the inspiration of the present utility model or by combining the features of the present utility model with those of other existing technologies falls within the protection scope of the present utility model.

[0029] For those embodiments where specific experimental steps or conditions are not indicated, the operations or conditions of the conventional experimental steps described in the literature in this field can be followed. For the reagents or instruments whose manufacturers are not indicated, they are all conventional reagent products that can be obtained through commercial purchase.

[0030] Embodiment

[0031] As Figure 1 shown, the present utility model provides a treatment system for the wastewater from the production of polypeptide products, including an anaerobic tank, an aerobic tank, a physicochemical treatment tank, a sedimentation tank, a feeding unit, a conveying assembly, a control unit, and several monitoring components;

[0032] The feeding unit includes an oxidant feeding device, an alkali solution feeding device, a coagulant feeding device, and a flocculant feeding device. The oxidant feeding device is connected to the anaerobic tank and the aerobic tank, the alkali solution feeding device is connected to the anaerobic tank and the aerobic tank, the coagulant feeding device is connected to the physicochemical treatment tank, and the flocculant feeding device is connected to the sedimentation tank;

[0033] The conveying assembly is connected to the anaerobic tank, the aerobic tank, the physicochemical treatment tank, and the sedimentation tank, and is used to make the wastewater from the production of polypeptide products flow into the anaerobic tank, the aerobic tank, the physicochemical treatment tank, and the sedimentation tank in sequence;

[0034] The monitoring components include a pH meter and a redox potential meter, and monitoring components are arranged in the anaerobic tank, the aerobic tank, the physicochemical treatment tank, and the sedimentation tank;

[0035] The control unit includes a control unit which is connected to a monitoring component, a conveying component, an oxidant feeding device, an alkali solution feeding device, a coagulant feeding device, and a flocculant feeding device;

[0036] The on-line detection data from the pH meter and the redox potentiometer are fed back to the control unit, and then the corresponding solenoid valves are controlled by the control unit to adjust the dosing amount of the medicaments in the feeding devices in real time;

[0037] The oxidant feeding device includes an oxidant storage tank and an oxidant feeding pipeline. One end of the oxidant feeding pipeline is connected to the oxidant storage tank, and the other end is connected to the anaerobic tank and the aerobic tank; a first solenoid valve is provided on the oxidant feeding pipeline, and the first solenoid valve is connected to the control unit; among them, there are 2 first solenoid valves, which feed materials to the anaerobic tank and the aerobic tank respectively;

[0038] The alkali solution feeding device includes an alkali solution storage tank and an alkali solution feeding pipeline. One end of the alkali solution feeding pipeline is connected to the alkali solution storage tank, and the other end is connected to the anaerobic tank and the aerobic tank; a second solenoid valve is provided on the alkali solution feeding pipeline, and the second solenoid valve is connected to the control unit; among them, there are 2 second solenoid valves, which feed materials to the anaerobic tank and the aerobic tank respectively;

[0039] The coagulant feeding device includes a coagulant storage tank and a coagulant feeding pipeline. One end of the coagulant feeding pipeline is connected to the coagulant storage tank, and the other end is connected to the physicochemical treatment tank; a third solenoid valve is provided on the coagulant feeding pipeline, and the third solenoid valve is connected to the control unit;

[0040] The flocculant feeding device includes a flocculant storage tank and a flocculant feeding pipeline. One end of the flocculant feeding pipeline is connected to the flocculant storage tank, and the other end is connected to the sedimentation tank; a fourth solenoid valve is provided on the flocculant feeding pipeline, and the fourth solenoid valve is connected to the control unit;

[0041] The conveying component includes a first conveying pipe connecting the anaerobic tank and the aerobic tank, a second conveying pipe connecting the aerobic tank and the physicochemical treatment tank, and a third conveying pipe connecting the physicochemical treatment tank and the sedimentation tank. A fifth solenoid valve is provided on the first conveying pipe, a sixth solenoid valve is provided on the second conveying pipe, and a seventh solenoid valve is provided on the third conveying pipe. The fifth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve are all connected to the control unit;

[0042] The treatment system further includes an evaporation and condensation unit, which includes an evaporation and condensation device, a recycled water collection device, and a waste liquid collection device; the water after evaporation and condensation enters the recycled water collection device and is used as the cooling water for large freeze-drying equipment in the polypeptide industry;

[0043] The water inlet of the evaporation and condensation device is connected to the water outlet of the sedimentation tank, the water outlet of the evaporation and condensation device is connected to the recycled water collection device, and the waste liquid outlet of the evaporation and condensation device is connected to the waste liquid collection device;

[0044] The treatment system further includes a waste residue treatment unit, and the waste residue treatment unit includes a filter press device and a waste solid collection device;

[0045] The inlet of the filter press device is connected to the slag discharge port of the sedimentation tank, the slag discharge port of the filter press device is connected to the waste solid collection device, and the water outlet of the filter press device is connected to the anaerobic tank and / or the aerobic tank;

[0046] The treatment system further includes a wastewater collection tank, and the water outlet of the wastewater collection tank is connected to the water inlet of the anaerobic tank;

[0047] The conveying assembly further includes a fourth conveying pipe connecting the sedimentation tank and the evaporation and condensation device, a fifth conveying pipe connecting the sedimentation tank and the filter press device, and a sixth conveying pipe connecting the wastewater collection tank and the anaerobic tank. An eighth solenoid valve is provided on the fourth conveying pipe, a ninth solenoid valve is provided on the fifth conveying pipe, and a tenth solenoid valve is provided on the sixth conveying pipe. The eighth solenoid valve, the ninth solenoid valve, and the tenth solenoid valve are all connected to the control unit.

[0048] Using the above treatment system, the polypeptide product production wastewater in the wastewater collection tank is pumped to the anaerobic tank through the sixth conveying pipe, and the oxidant sodium hypochlorite and the lye sodium hydroxide solution are respectively added to the anaerobic tank through the oxidant feeding pipe and the lye feeding pipe; wherein, the mass ratio of the oxidant sodium hypochlorite to the lye sodium hydroxide solution is 2:1, making the anaerobic environment alkaline, controlling the pH to be 10 - 11, and an incomplete oxidation reaction occurs in the anaerobic tank at 15°C - 30°C. The amino acid raw materials in the polypeptide production wastewater and the cyanide in other chemical reagents are oxidized into cyanate. The reaction lasts for 10h - 15h, and when the ORP platinum electrode potential detected by the oxidation-reduction potentiometer reaches 300mV, the incomplete oxidation is completed; specifically: CN - reacts with ClO - to first generate CNCl, and then is incompletely oxidized to CNO - ;

[0049] CN - +ClO - +H2O = CNCl + 2OH -

[0050] CNCl + 2OH - = CNO - +Cl - +H2O

[0051] The wastewater after reaction in the anaerobic tank is pumped into the aerobic tank through the first conveying pipeline. Sodium hypochlorite, an oxidant, is added to the aerobic tank through the oxidant feeding pipeline, and a blower is used to ensure sufficient contact. A complete oxidation reaction occurs in the aerobic tank at 15°C - 30°C, further decomposing the cyanate in the organic matter and organic reagents into carbon dioxide and nitrogen. When the pH meter detects that the pH drops from 10 - 11 to 7, the addition of sodium hypochlorite is stopped. If the initial pH is too low, sodium hydroxide solution is added to the anaerobic tank through the lye feeding pipeline to adjust the pH to 10 - 11. After reacting for 10h - 15h and the pH rises to 8, when the ORP platinum electrode potential reaches 650 mV, the oxidation reaction is complete, and the residual chlorine content is 3 ppm - 5 ppm. Specifically:

[0052] 2CNO - +3ClO - +H2O=2CO2+N2+3Cl - +2OH -

[0053] In the stage of incomplete oxidation reaction, the molar ratio of CN - and Cl - is 1:1. In the stage of complete oxidation, the molar ratio of CNO - and Cl - is 2:3. The total molar ratio of CN - 、CNO - and Cl - is 3:2:3.

[0054] The reaction rates of the incomplete oxidation reaction and the complete oxidation reaction depend on the pH value, water temperature, and effective chlorine concentration. The higher the pH value, the higher the water temperature, and the higher the effective chlorine concentration, the faster the hydrolysis rate.

[0055] The wastewater after reaction in the anaerobic tank is conveyed to the physical and chemical treatment tank through the second conveying pipeline. Polyaluminum chloride (PAC), a coagulant, is added to the physical and chemical treatment tank through the coagulant feeding pipeline to lower the pH to 7.5 - 7.8 and the redox potential to 400 mV - 500 mV, enabling the next operation.

[0056] The wastewater after reaction in the physical and chemical treatment tank is conveyed to the sedimentation tank through the third conveying pipeline. Polyacrylamide (PM), a flocculant, is added to the sedimentation tank through the flocculant feeding pipeline to lower the pH to 7 - 7.5 and the redox potential to 350 mV - 450 mV, further precipitating the residual reagents in the waste liquid into solid substances.

[0057] After the waste residue treated by the sedimentation tank is transported to the filter press device through the fifth conveying pipeline for filter pressing, the solid fertilizer sludge is collected into the waste solid collection device, and the waste liquid enters the anaerobic tank and / or aerobic tank for recovery treatment; the liquid treated by the sedimentation tank is transported to the evaporation and condensation device through the fourth conveying pipeline for distillation and condensation treatment. The condensed water fully complies with the national discharge standards, is collected into the recycled water collection device, and is used as the cooling water for the large freeze-drying equipment in the polypeptide industry. The distillation residue is treated as concentrated waste liquid and is collected into the waste liquid collection device. The concentrated waste liquid accounts for less than 1% of the original waste liquid.

[0058] Obviously, the above-mentioned embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A treatment system for the production wastewater of a polypeptide product, characterized in that, It includes an anaerobic tank, an aerobic tank, a physicochemical treatment tank, a sedimentation tank, a feeding unit, a conveying assembly, a control unit and several monitoring assemblies; The feeding unit includes an oxidant feeding device, an alkali solution feeding device, a coagulant feeding device and a flocculant feeding device. The oxidant feeding device is connected to the anaerobic tank and the aerobic tank. The alkali solution feeding device is connected to the anaerobic tank and the aerobic tank. The coagulant feeding device is connected to the physicochemical treatment tank. The flocculant feeding device is connected to the sedimentation tank; The conveying assembly is connected to the anaerobic tank, the aerobic tank, the physicochemical treatment tank and the sedimentation tank, and is used to make the polypeptide product production wastewater flow into the anaerobic tank, the aerobic tank, the physicochemical treatment tank and the sedimentation tank in sequence; The monitoring assemblies include a pH meter and an oxidation-reduction potential meter, and the monitoring assemblies are arranged in the anaerobic tank, the aerobic tank, the physicochemical treatment tank and the sedimentation tank; The control unit is connected to the monitoring assemblies, the conveying assembly, the oxidant feeding device, the alkali solution feeding device, the coagulant feeding device and the flocculant feeding device.

2. The treatment system for the wastewater from the production of polypeptide products according to claim 1, characterized in that The oxidant feeding device includes an oxidant storage tank and an oxidant feeding pipeline. One end of the oxidant feeding pipeline is connected to the oxidant storage tank, and the other end of the oxidant feeding pipeline is connected to the anaerobic tank and the aerobic tank. A first electromagnetic valve is arranged on the oxidant feeding pipeline, and the first electromagnetic valve is connected to the control unit.

3. The treatment system for the wastewater from the production of the polypeptide product according to claim 1, wherein The alkali solution feeding device includes an alkali solution storage tank and an alkali solution feeding pipeline. One end of the alkali solution feeding pipeline is connected to the alkali solution storage tank, and the other end of the alkali solution feeding pipeline is connected to the anaerobic tank and the aerobic tank. A second electromagnetic valve is arranged on the alkali solution feeding pipeline, and the second electromagnetic valve is connected to the control unit.

4. The treatment system for the wastewater from the production of the polypeptide product according to claim 1, characterized in that, The coagulant feeding device includes a coagulant storage tank and a coagulant feeding pipeline. One end of the coagulant feeding pipeline is connected to the coagulant storage tank, and the other end of the coagulant feeding pipeline is connected to the physicochemical treatment tank. A third electromagnetic valve is arranged on the coagulant feeding pipeline, and the third electromagnetic valve is connected to the control unit.

5. The treatment system for the wastewater from the production of polypeptide products according to claim 1, characterized in that The flocculant feeding device includes a flocculant storage tank and a flocculant feeding pipeline. One end of the flocculant feeding pipeline is connected to the flocculant storage tank, and the other end of the flocculant feeding pipeline is connected to the sedimentation tank. A fourth electromagnetic valve is arranged on the flocculant feeding pipeline, and the fourth electromagnetic valve is connected to the control unit.

6. The treatment system for the production wastewater of the polypeptide product according to claim 1, wherein The conveying assembly includes a first conveying pipe connecting the anaerobic tank and the aerobic tank, a second conveying pipe connecting the aerobic tank and the physicochemical treatment tank, and a third conveying pipe connecting the physicochemical treatment tank and the sedimentation tank. A fifth electromagnetic valve is arranged on the first conveying pipe, a sixth electromagnetic valve is arranged on the second conveying pipe, and a seventh electromagnetic valve is arranged on the third conveying pipe. The fifth electromagnetic valve, the sixth electromagnetic valve and the seventh electromagnetic valve are all connected to the control unit.

7. The treatment system for the wastewater from the production of the polypeptide product according to claim 1, characterized in that, The treatment system further includes an evaporation and condensation unit, and the evaporation and condensation unit includes an evaporation and condensation device, a recycled water collection device and a waste liquid collection device; The water inlet of the evaporation and condensation device is connected to the water outlet of the sedimentation tank, the water outlet of the evaporation and condensation device is connected to the reclaimed water collection device, and the waste liquid outlet of the evaporation and condensation device is connected to the waste liquid collection device.

8. The treatment system for the production wastewater of the polypeptide product according to claim 7, characterized in that, The treatment system further includes a waste residue treatment unit, and the waste residue treatment unit includes a filter press device and a waste solid collection device; The inlet of the filter press device is connected to the slag discharge port of the sedimentation tank, the slag discharge port of the filter press device is connected to the waste solid collection device, and the water outlet of the filter press device is connected to the anaerobic tank and / or the aerobic tank.

9. The treatment system for the wastewater from the production of the polypeptide product according to claim 8, wherein, The treatment system further includes a wastewater collection tank, and the water outlet of the wastewater collection tank is connected to the water inlet of the anaerobic tank.

10. The treatment system for the wastewater produced in the production of the polypeptide product according to claim 9, characterized in that, The conveying assembly further includes a fourth conveying pipe connecting the sedimentation tank and the evaporation and condensation device, a fifth conveying pipe connecting the sedimentation tank and the filter press device, and a sixth conveying pipe connecting the wastewater collection tank and the anaerobic tank. An eighth solenoid valve is provided on the fourth conveying pipe, a ninth solenoid valve is provided on the fifth conveying pipe, and a tenth solenoid valve is provided on the sixth conveying pipe. The eighth solenoid valve, the ninth solenoid valve, and the tenth solenoid valve are all connected to the control unit.

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