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Method for pretreating industrial waste water

A technology for industrial wastewater and pretreatment, applied in water/sewage treatment, multi-stage water/sewage treatment, oxidized water/sewage treatment, etc. The effect of reducing sulfate removal rate, improving treatment efficiency and reducing treatment cost

Active Publication Date: 2012-05-23
鲁南新时代生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After reviewing the literature, no economical, effective and systematic method for treating this type of wastewater has been found so far

Method used

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  • Method for pretreating industrial waste water
  • Method for pretreating industrial waste water
  • Method for pretreating industrial waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 4000mL of waste water produced in the production process of 7-ADCA (produced by Shandong New Times Pharmaceutical Co., Ltd., production batch number is 11033130), and divide it evenly into four parts, each part is 1000mL. The experimental parameters and treatment results of each treatment group are shown in Table 1, wherein COD cr Measured by dichromate method (GB 11914-89), BOD 5 Measured by dilution and inoculation method (HJ505-2009).

[0031] Table 1: Comparison of parameters control and treatment results of wastewater produced in the 7-ADCA production process by different processes

[0032]

[0033] As shown in Table 1, the results of different wastewater treatment processes, B / C and COD after wastewater treatment using iron-carbon micro-electrolysis process and ozone oxidation process cr The removal rate is not only significantly different from the experimental raw water, but also significantly different from the wastewater treatment effect of the iron-ca...

Embodiment 2

[0035] Take 3000mL of wastewater generated during the production process of 7-ADCA (produced by Shandong New Times Pharmaceutical Co., Ltd., production batch number is 11033130), and divide it into three parts evenly, each with 1000mL. The experimental parameters and treatment results of each treatment group are shown in Table 2, in which SO before and after treatment 4 2- Measured by gravimetric method (GB 11899-89).

[0036] Table 2: Comparison of parameters control and treatment results of wastewater produced in the 7-ADCA production process by different processes

[0037]

[0038] As shown in Table 2, calcium oxide and calcium chloride are used to process wastewater produced in the 7-ADCA production process, and the SO after treatment 4 2- The content of SO is not only significantly different from the experimental raw water group, but also compared with the SO content of industrial wastewater treated with calcium oxide alone. 4 2- content was also significantly red...

Embodiment 3

[0040] The wastewater indicators discharged from a 7-ADCA production workshop are shown in Table 3. Add the iron carbon after soaking and activation to the micro electrolytic cell, and the amount of iron filings is 0.8kg / m 3 , the mass ratio of iron to carbon is Fe:C=4:1. After the wastewater enters, the aeration is turned on, and after 90 minutes of reaction, it is discharged into the sedimentation tank, and the supernatant enters the ozone oxidation tank, and the amount of ozone is 12g / m 3 , The reaction time is 60min. After the reaction, the effluent enters the desulfurization tank, and the dosage of calcium oxide is 6kg / m 3 , Calcium oxide and calcium chloride are added at a mass ratio of 4:1. After the stirring is started and fully mixed, the effluent enters the advection sedimentation tank, radial flow sedimentation tank, sand filter tank and air flotation tank successively. Add sodium hydroxide solution to fine-tune the pH to 9 after air flotation, and then pump it t...

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Abstract

The invention discloses a method for pretreating industrial waste water. The method comprises the following steps of: performing micro-electrolysis on an iron-carbon alloy, oxidizing the iron-carbon alloy by ozone, chemically precipitating calcium oxide and calcium chloride, stripping off ammonia and absorbing by acid. The BOD5 / CODCr(B / C) of the industrial waste water treated by using the method is increased by over 45 percent, the chemical oxygen demand (COD) removal rate is more than 75 percent, the SO4<2-> removal rate is more than 90 percent, and the (NH3-N) removal rate is more than 93 percent.

Description

technical field [0001] The invention relates to a treatment method for waste water produced in the pharmaceutical industry, in particular to a pretreatment method for waste water produced in the production process of 7-ADCA, and belongs to the field of sewage treatment. Background technique [0002] 7-ADCA is an important semi-synthetic intermediate of cephalosporin antibiotics, used in the pharmaceutical industry to synthesize cephalexin, cephradine and cefadroxil and other drugs. Since the above-mentioned drugs synthesized with 7-ADCA have the characteristics of broad antibacterial spectrum, low toxicity and side effects, low allergic reaction and can be taken orally, they are widely used. Therefore, there is a lot of room for development in the production and application of 7-ADCA . 7-ADCA is synthesized from penicillin potassium salt as raw material through oxidation, silicon esterification, ring expansion, enzymatic cleavage, crystallization and drying. Due to the use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/78C02F1/461
Inventor 苏建文王彩冬朱文杰陈建华
Owner 鲁南新时代生物技术有限公司
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