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Process for treating antibiotic pharmaceutical wastewater

A technology for treating process and pharmaceutical wastewater, applied in water/sewage multi-stage treatment, oxidized water/sewage treatment, illumination water/sewage treatment, etc. Effect

Active Publication Date: 2009-11-04
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-residue antibiotics enter natural water bodies through wastewater discharge. Due to the nature of antibiotics, long-term exposure of organisms in the environment to high concentrations of antibiotics can easily lead to the production of drug-resistant bacteria, which will bring harm to the ecological environment of water bodies and human health. serious damage

Method used

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  • Process for treating antibiotic pharmaceutical wastewater
  • Process for treating antibiotic pharmaceutical wastewater

Examples

Experimental program
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Embodiment 1

[0032] The production wastewater of a domestic oxytetracycline production plant was taken for testing. The raw water quality is shown in Table 2: It can be seen that the sewage has high COD, ammonia nitrogen, sulfate radical and low biodegradability. The waste water is treated by adopting the treatment process for pharmaceutical waste water provided by the invention. First, the residual mycelium is separated by sedimentation in the sedimentation tank. After precipitation, the wastewater is pumped to the first-level biological oxidation tank. The water retention time in this tank is 24 hours. Under the action of mold, part of the organic matter in the sewage is decomposed and oxidized; The effluent stays in the primary sedimentation tank for 8 hours for solid-liquid separation; the separated supernatant enters the Fenton reaction tank, adjusts the pH to 3.5, and the amount of hydrogen peroxide is 1-10% of the concentration of oxytetracycline in the wastewater. Generally speaki...

Embodiment 2

[0038] The production wastewater of a domestic oxytetracycline production plant was taken for testing. The raw water quality is shown in Table 2: It can be seen that the sewage has high COD, ammonia nitrogen, sulfate radical and low biodegradability. The waste water is treated by adopting the treatment process for pharmaceutical waste water provided by the invention. First, the residual mycelium is separated by precipitation in the sedimentation tank. After precipitation, the wastewater is pumped to the first-level biological oxidation tank. The water retention time in this tank is 48 hours. Under the action of yeast, part of the organic matter in the sewage is decomposed and oxidized ; The effluent stays in the primary sedimentation tank for 8 hours for solid-liquid separation; the separated supernatant enters the ozone reactor. Adjust the pH of the wastewater to 7, the dosage of ozone is in the range of 30-120mg / L, and the reaction time of ozone oxidation is 2 hours. Durin...

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Abstract

The invention provides a process for treating antibiotic pharmaceutical wastewater. The process comprises the following steps that: A, pharmaceutical wastewater is subjected to precipitation separation, enters a primary biological oxidation pond, is added with yeast or mould for biochemical treatment, stays in water for 6 to 72 hours, is taken out from the water, and then is subjected to solid-liquid separation; B, the wastewater treated in a step A is oxidized, wherein oxidation conditions are as follows: the pH of the wastewater is regulated to be between 3 and 4.5; hydrogen peroxide and divalent iron reagent are added for oxidation; oxidation time is 1 to 10 hours; the molar ratio of the hydrogen peroxide H2O2 to divalent iron Fe is 1 to 50; and the hydrogen peroxide is 1 to 10 times the concentration of antibiotics in the wastewater; or the oxidation conditions are as follows: the pH of the wastewater is regulated to be between 7 and 11; ozone is supplied for oxidation; the dosage of the ozone is 30 to 120 mg / L; and the oxidation time is 1 to 10 hours; C, the wastewater treated in a step B is subjected to solid-liquid separation, enters a secondary biological oxidation pond, and then is oxidized to remove substances easy to biodegrade; and D, the wastewater treated in a step C is precipitated, and then supernatant is discharged.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a treatment process for pharmaceutical wastewater. Background technique [0002] According to incomplete statistics, the annual discharge of wastewater from the pharmaceutical industry in my country is 2×10 8 ~3×10 8 t, the chemical oxygen demand is about 1.5×10 5 t, the average treatment rate is <30%, especially the waste water from the production of antibiotics. According to the secondary standard of GB8978-1996 "Integrated Wastewater Discharge Standard", the wastewater in the biopharmaceutical industry must meet the following requirements after treatment: COD Cr ≤150mg / L; BOD 5 ≤300mg / L; NH3-N≤50mg / L; SS≤200mg / L. [0003] Antibiotics are produced through microbial fermentation, filtration, extraction and crystallization, chemical extraction, and refining. The composition of its production wastewater is complex, mainly including extraction residual antib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/72C02F1/78C02F1/32
Inventor 杨敏李魁晓张昱曹楠丁然
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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