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Pretreatment method of guanine wastewater

A guanine and pretreatment technology, applied in the field of guanine wastewater pretreatment, can solve the problems of high concentration of organic pollutants, refractory degradation, effluent chemical oxygen demand and total nitrogen compliance, etc., so as to improve the degradation effect and save costs. , Improve the effect of BOD/COD ratio

Inactive Publication Date: 2019-03-08
江苏南大华兴环保科技股份公司
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  • Claims
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Problems solved by technology

[0006] In view of the characteristics of high organic nitrogen acid wastewater produced in the production process of guanine, such as high concentration of organic pollutants, high concentration of ammonia nitrogen, high salt content, strong acidity, refractory degradation, and high toxicity, the existing treatment technology cannot make the effluent For the problem of chemical oxygen demand and total nitrogen reaching the standard, the present invention provides a pretreatment method for guanine wastewater. Through rational design of the process, the coordinated degradation of chemical oxygen demand, total nitrogen and ammonia nitrogen of the wastewater is realized, making the effluent The chemical oxygen demand (COD), total nitrogen and ammonia nitrogen content of the water quality meet the sewage discharge standards, and can create optimal conditions for subsequent high-salt wastewater evaporation and salt treatment or biochemical treatment

Method used

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  • Pretreatment method of guanine wastewater

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Embodiment 1

[0045] The specific steps in this embodiment are as follows:

[0046] The first step: pump the guanine wastewater into the collection tank, enter the pH adjustment tank after homogenization and uniformity, add sodium hydroxide (flake caustic soda), adjust the pH to 7 for neutralization and precipitation, and obtain the first-level effluent;

[0047] The second step: the first-level effluent in the first step enters the coagulation sedimentation tank for coagulation and sedimentation. PAC is a flocculant, and the dosage is 100mg / L; at the same time, PAM is added as a coagulant, and the dosage is 7mg / L. After the coagulation and sedimentation is over, the supernatant is taken to obtain the secondary effluent;

[0048] The third step: pump the secondary effluent in the second step into the catalytic oxidation tower, and add H in an amount of 0.2% of the volume of wastewater 2 O 2 Solution (mass fraction of 30%), add 500mg / L ozone, perform O 3 / H 2 O 2 Catalytic oxidation, the reaction ...

Embodiment 2

[0056] The specific steps in this embodiment are as follows:

[0057] The first step: pump the guanine wastewater into the collection tank, enter the pH adjustment tank after homogenization, add sodium hydroxide (flake caustic soda), adjust the pH to 5 for neutralization and precipitation, and obtain the first-level effluent;

[0058] The second step: the first-level effluent in the first step enters the coagulation sedimentation tank for coagulation and precipitation, PAS is a flocculant, and the dosage is 300mg / L; at the same time, PAM is added as a coagulant, and the dosage is 5mg / L. After the coagulation and sedimentation is over, the supernatant is taken to obtain the secondary effluent;

[0059] The third step: Pump the secondary effluent in the second step into the catalytic oxidation tower, and add H in an amount of 0.5% of the waste water volume 2 O 2 Solution (mass fraction of 30%), add 300mg / L ozone, perform O 3 / H 2 O 2 Catalytic oxidation, the reaction time is controlle...

Embodiment 3

[0067] The specific steps in this embodiment are as follows:

[0068] The first step: pump the guanine wastewater into the collection tank, enter the pH adjustment tank after homogenization, add sodium hydroxide (flake caustic soda), adjust the pH to 6 for neutralization and precipitation, and obtain the first-level effluent;

[0069] The second step: the first-stage effluent in the first step enters the coagulation sedimentation tank for coagulation and sedimentation, PAFC is a flocculant, and the dosage is 500mg / L; at the same time, PAM is added as a coagulant, and the dosage is 10mg / L. After the coagulation and sedimentation is over, the supernatant is taken to obtain the secondary effluent;

[0070] The third step: pump the secondary effluent in the second step into the catalytic oxidation tower, and add H in an amount of 1% of the volume of wastewater 2 O 2 Solution (mass fraction of 30%), add 200mg / L ozone, perform O 3 / H 2 O 2 Catalytic oxidation, the reaction time is control...

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Abstract

The invention discloses a pretreatment method of guanine wastewater and belongs to the field of pharmaceutical wastewater treatment. According to the pretreatment method, neutralized sedimentation, coagulating sedimentation, O3 / H2O2 catalytic oxidation and electrocatalytic oxidation are orderly coupled together, cyclic and macromolecular organic matters can be damaged to open chains and transformed into biodegradable low molecular weight organic matters; part of pollutants is thoroughly mineralized, chemical oxygen demand in the guanine wastewater and synergetic degradation of total nitrogen are realized to the maximum extent, the ratio of BOD to COD is remarkably improved, the chemical oxygen demand and the contents of total nitrogen and ammonia nitrogen in effluent quality are enabled toreach sewage discharge standards and conditions can be created for subsequent treatment. The pretreatment method of the guanine wastewater, disclosed by the invention, has the advantages of high oxidation capacity, good synergistic effect, low consumption and high efficiency, is particularly suitable for pretreating refractory wastewater with low pH value, high salinity and high concentration andis an environment-friendly technology.

Description

Technical field [0001] The invention belongs to the field of medical wastewater treatment, and more specifically, relates to a pretreatment method of guanine wastewater. Background technique [0002] Guanine is an intermediate for the synthesis of drugs for the treatment of hepatitis B, and a necessary intermediate for the development of purine series of anti-herpes drugs with high efficiency and low toxicity, so it has a wide range of uses. Guanine belongs to the purine class of organic compounds. It is formed by the fusion of a pyrimidine ring and an imidazole ring. From the basic structure, it is composed of carbon and nitrogen atoms and has a characteristic bicyclic structure. It is combined with cytosine with three hydrogens. The key is connected. There are many synthetic methods for guanine. The most common synthetic method is the reflux reaction of 2,4,5-triamino-6-hydroxypyrimidine sulfate and sodium formate under the catalysis of formic acid, followed by acidification w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/38C02F101/34C02F101/16
CPCC02F1/467C02F1/5236C02F1/56C02F1/66C02F1/722C02F1/725C02F1/78C02F9/00C02F2101/16C02F2101/34C02F2101/38
Inventor 赵选英杨峰戴建军刘君君卢阳
Owner 江苏南大华兴环保科技股份公司
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