Treatment process and treatment system of pharmaceutical wastewater

Abstract

The invention discloses a treatment process of pharmaceutical wastewater. The treatment process comprises the following steps: performing the Fenton reagent oxidation on to-be-treated pharmaceutical wastewater, settling by virtue of a settling tank, then treating the wastewater in a UASB reactor, a biological contact oxidation tank, and an MBR reaction tank to obtain the water conforming to the pollutant emission standard of an urban sewage treatment factory. The obtained pharmaceutical wastewater treatment process is further combined with the treatment system to efficiently treat the pollutants of the pharmaceutical wastewater, so that the produced water conforms to the pollutant emission standard of the urban sewage treatment factory, the stable and thorough treatment of the pharmaceutical wastewater can be realized, and the economic and environmental protection significance is remarkable.

Description

technical field

[0001] The invention relates to the technical field of pharmaceutical wastewater treatment, in particular to a treatment process for pharmaceutical wastewater and a treatment system used in the treatment process. Background technique

[0002] Pharmaceutical wastewater mainly includes four categories: antibiotic production wastewater, synthetic drug production wastewater, Chinese patent medicine production wastewater, and washing water and flushing wastewater in the production process of various preparations. Among them, chemical pharmaceutical wastewater comes from chemical synthesis and purification, or separation and purification of medicinal plants, and has high content of organic matter and inorganic salts, BOD 5 Low ratio to CODcr and large fluctuations, poor biodegradability, intermittent discharge, water volume fluctuations, etc.; biopharmaceutical wastewater mainly comes from saccharification, fermentation, extraction and other processes, with large w...

Examples

Embodiment 1

[0034] The waste water from the chemical and pharmaceutical production field has a COD of 20000-25000 mg / L, a SS of 1000-1500 mg / L, a B / C<0.1, and a pH of 6.8. The waste water is treated by the following process;

[0035]Choose a simple primary sedimentation tank according to different wastewater quality, remove the large particle pollutants in the wastewater, and then carry out the following treatment procedures in sequence:

[0036] a. Oxidation of Fenton's reagent: first use a sulfuric acid solution with a concentration of 30% to adjust the pH of the pharmaceutical wastewater to be treated to 2.5, and then add Fenton's reagent H 2 o 2 with FeSO 4 , oxidized for 40 minutes after stirring evenly with the long-rod stirring paddle; among them, the dosage of Fenton’s reagent is H 2 o 2 =3g / L, FeSO 4 =1.6g / L;

[0037] b. Sedimentation: the waste water treated in step a is treated with Ca(OH) 2 Adjust the suspension to neutral, then add the coagulant PAM2.5mg / L, stir well an...

Embodiment 2

[0042] Wastewater from the field of biopharmaceutical production, its COD is 8400mg / L, SS is 240mg / L, BOD is 4300mg / L, pH is 8.6, adopt the following process to treat the wastewater;

[0043] Choose simple primary sedimentation according to different wastewater quality, remove the large particle pollutants in the wastewater, and then carry out the following treatment procedures in sequence:

[0044] a. Oxidation of Fenton's reagent: first use a sulfuric acid solution with a concentration of 25% to adjust the pH of the pharmaceutical wastewater to be treated to 3, and then add Fenton's reagent H 2 o 2 with FeSO 4 , after stirring evenly with the long-rod stirring blade, the oxidation treatment was carried out for 30 minutes, wherein the dosage of Fenton’s reagent was H 2 o 2 =2g / L, FeSO 4 =1.2g / L;

[0045] b. Sedimentation: After the wastewater NaOH solution treated in step a is adjusted to neutral, then add coagulant PAM2.5mg / L, stir well and then enter the sedimentation ...

technical field

[0001] The invention relates to the technical field of pharmaceutical wastewater treatment, in particular to a treatment process for pharmaceutical wastewater and a treatment system used in the treatment process. Background technique

[0002] Pharmaceutical wastewater mainly includes four categories: antibiotic production wastewater, synthetic drug production wastewater, Chinese patent medicine production wastewater, and washing water and flushing wastewater in the production process of various preparations. Among them, chemical pharmaceutical wastewater comes from chemical synthesis and purification, or separation and purification of medicinal plants, and has high content of organic matter and inorganic salts, BOD 5 Low ratio to CODcr and large fluctuations, poor biodegradability, intermittent discharge, water volume fluctuations, etc.; biopharmaceutical wastewater mainly comes from saccharification, fermentation, extraction and other processes, with large w...

Examples

Embodiment 1

[0034] The waste water from the chemical and pharmaceutical production field has a COD of 20000-25000 mg / L, a SS of 1000-1500 mg / L, a B / C<0.1, and a pH of 6.8. The waste water is treated by the following process;

[0035]Choose a simple primary sedimentation tank according to different wastewater quality, remove the large particle pollutants in the wastewater, and then carry out the following treatment procedures in sequence:

[0036] a. Oxidation of Fenton's reagent: first use a sulfuric acid solution with a concentration of 30% to adjust the pH of the pharmaceutical wastewater to be treated to 2.5, and then add Fenton's reagent H 2 o 2 with FeSO 4 , oxidized for 40 minutes after stirring evenly with the long-rod stirring paddle; among them, the dosage of Fenton’s reagent is H 2 o 2 =3g / L, FeSO 4 =1.6g / L;

[0037] b. Sedimentation: the waste water treated in step a is treated with Ca(OH) 2 Adjust the suspension to neutral, then add the coagulant PAM2.5mg / L, stir well an...

Embodiment 2

[0042] Wastewater from the field of biopharmaceutical production, its COD is 8400mg / L, SS is 240mg / L, BOD is 4300mg / L, pH is 8.6, adopt the following process to treat the wastewater;

[0043] Choose simple primary sedimentation according to different wastewater quality, remove the large particle pollutants in the wastewater, and then carry out the following treatment procedures in sequence:

[0044] a. Oxidation of Fenton's reagent: first use a sulfuric acid solution with a concentration of 25% to adjust the pH of the pharmaceutical wastewater to be treated to 3, and then add Fenton's reagent H 2 o 2 with FeSO 4 , after stirring evenly with the long-rod stirring blade, the oxidation treatment was carried out for 30 minutes, wherein the dosage of Fenton’s reagent was H 2 o 2 =2g / L, FeSO 4 =1.2g / L;

[0045] b. Sedimentation: After the wastewater NaOH solution treated in step a is adjusted to neutral, then add coagulant PAM2.5mg / L, stir well and then enter the sedimentation ...

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