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High-concentration, degradation-resistant chemical synthesis pharmaceutical wastewater treatment method and system

A chemical synthesis and treatment method technology, applied in the field of wastewater treatment, can solve the problems of strong biological toxicity, substandard water quality, complex components, etc., and achieve the effects of poor impact load resistance, COD degradation, and single function

Active Publication Date: 2019-01-01
重庆中标环保集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Chemical synthesis pharmaceutical wastewater has high COD, high salt content, deep color, frequent replacement of pharmaceutical varieties, uncertain discharge rules, wide range of pH fluctuations, and high ammonia nitrogen content. It is a difficult wastewater with complex components and strong biological toxicity.
[0003] Chemical synthesis and pharmaceutical wastewater pollutants contain cyclic and long-chain organic pollutants, which have strong biological toxicity
Wastewater has a high salt content, including monovalent salt and divalent salt. Excessive salt content will affect the osmotic pressure of cells, microorganisms cannot grow, and B / C between 0.1 and 0.2 has low biodegradability. Biochemical treatment of synthetic pharmaceutical wastewater poses great difficulties
[0004] Chemical synthesis of pharmaceutical wastewater, especially pharmaceutical intermediate wastewater, currently uses complex processes, high investment and operating costs, and there are situations where the operation is unstable and the water quality is not up to standard

Method used

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  • High-concentration, degradation-resistant chemical synthesis pharmaceutical wastewater treatment method and system
  • High-concentration, degradation-resistant chemical synthesis pharmaceutical wastewater treatment method and system
  • High-concentration, degradation-resistant chemical synthesis pharmaceutical wastewater treatment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 High concentration, refractory chemical synthesis pharmaceutical wastewater treatment

[0039] For the treatment of high-concentration, refractory chemical synthesis and pharmaceutical wastewater, follow the steps below, and the process flow chart is as follows: figure 1 Shown:

[0040] (1) Since the wastewater discharge cycle of the pharmaceutical factory is uncertain, a large amount of high-concentration wastewater is discharged during the pilot test. The high-concentration pharmaceutical wastewater is input into the pre-aeration regulating tank, and the perforated tube is used to aerate and stir in the tank to make the water quality more uniform. The hydraulic retention time of the pre-aeration regulating tank is 4 days. The pre-aeration system adopts ABS material pipes, and the left and right opening angles are 30°. The fan type is selected according to air:water=10:1.

[0041] (2) Lift the wastewater in the pre-aeration adjustment tank to the coagulatio...

Embodiment 2

[0055] The specific treatment object of the present invention is pharmaceutical intermediate chemical synthesis pharmaceutical wastewater, water volume 500m 3 / d, of which high concentration wastewater 60m 3 / d, low concentration wastewater 440m 3 / d, the effluent is required to meet the standards in Table 2 of the "Discharge Standards for Water Pollutants of Chemical Synthesis Pharmaceutical Industry" (GB21904-2008), and the specific water quality is shown in Table 1:

[0056] Table 1

[0057]

[0058] According to the method of Example 1, the high-concentration wastewater and low-concentration wastewater in Table 1 are treated, wherein the high-concentration wastewater physicochemical system adopts flocculation precipitation + Fenton reactor + nano TiO 2 Photocatalytic. Use flocculation and sedimentation to remove suspended matter, and then enter the Fenton reactor + nano-TiO 2 Photocatalysis produces OH, destroys the structure and stability of molecules, opens rings ...

Embodiment 3

[0061] Example 3 High-concentration, refractory chemical synthesis pharmaceutical wastewater treatment system

[0062] A high-concentration, refractory chemical synthesis pharmaceutical wastewater treatment system used in the treatment methods of Examples 1 and 2, mainly composed of the following components: a pre-aeration adjustment tank 1 and a coagulation sedimentation tank 2 connected in sequence through pipelines , Fenton reactor 3, nano-TiO 2 Photocatalytic reactor 4, buffer sedimentation tank 5, comprehensive adjustment tank 6, forced hydrolysis tank 7, IC water distribution tank 8, IC anaerobic reactor 9, multifunctional biological purification tank 10, secondary sedimentation tank 11 and clear water tank 12. The forced hydrolysis tank 7 is to add a pulse water distribution system to the conventional hydrolysis acidification tank. The pulse water distribution system is composed of a high-efficiency pulse water distribution tank and a spiral umbrella water distributor; ...

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Abstract

The invention discloses a high-concentration, degradation-resistant chemical synthesis pharmaceutical wastewater treatment method. The method comprises the steps of: (1) inputting high concentration wastewater into a pre-aeration regulating tank; (2) upgrading to a coagulation sedimentation tank; (3) discharging water into a Fenton reactor for reaction; (4) entering a nano-TiO2 photocatalytic reactor for reaction; (5) discharging water into a buffer sedimentation tank; (6) entering a comprehensive regulating tank, and introducing low-concentration wastewater into the comprehensive regulating tank; (7) lifting to a forced hydrolysis tank; (8) entering an IC distribution tank; (9) lifting to an IC reactor; (10) entering a multifunctional biological purification tank, a secondary sedimentation tank; (11) discharging water into a clear water tank. The invention also discloses a treatment system, comprising the pre-aeration regulating tank, the coagulation sedimentation tank, the Fenton reactor, the nano-TiO2 photocatalytic reactor, the buffer sedimentation tank, the comprehensive regulating tank, the forced hydrolysis tank, the IC distribution tank, an IC anaerobic reactor, the multifunctional biological purification tank, the secondary sedimentation tank and the clear water tank which are connected in sequence.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a pharmaceutical wastewater treatment device and method, in particular to a high-concentration, refractory chemical synthesis pharmaceutical wastewater treatment method and system. Background technique [0002] Chemical synthesis pharmaceutical wastewater has high COD, high salt content, deep color, frequent changes of pharmaceutical varieties, uncertain discharge rules, wide range of pH fluctuations, and high ammonia nitrogen content. It is a difficult wastewater with complex components and strong biological toxicity. . [0003] Chemical synthesis and pharmaceutical wastewater pollutants contain cyclic and long-chain organic pollutants, which have strong biological toxicity. Wastewater has a high salt content, including monovalent salt and divalent salt. Excessive salt content will affect the osmotic pressure of cells, microorganisms cannot grow, and B / C between 0.1 and 0.2 ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/34
CPCC02F1/32C02F1/5236C02F1/56C02F1/66C02F1/725C02F3/30C02F9/00C02F2001/007C02F2103/343C02F2305/026C02F2305/10
Inventor 文明杰欧媛赵永成赵雪莲
Owner 重庆中标环保集团有限公司
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