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A treatment method and system for high-concentration refractory pharmaceutical wastewater

A technology for pharmaceutical wastewater and treatment methods, which is applied in the fields of natural water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of high reliability requirements of automatic control systems, high equipment idle rate, and increased operating costs, etc. To achieve the effect of stable residual pollutants, reduced labor intensity, and small footprint

Active Publication Date: 2020-09-18
BEIJING ANYUTONG ENVIRONMENT ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biological treatment process is widely used in pharmaceutical wastewater. The CASS process integrates reaction, precipitation, and drainage, making the degradation of pollutants a push-flow process in time, resulting in low volume utilization and high equipment idle rates. The control method is relatively simple, and the reliability of the automatic control system is high.
When the biological activated carbon method is used, since a large amount of activated carbon in the system is easily carried out of the system when the water is discharged, even if a large amount of flocculant is added, there will still be some loss, resulting in an increase in operating costs

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  • A treatment method and system for high-concentration refractory pharmaceutical wastewater

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Embodiment 1

[0038] combine figure 1 , the present embodiment provides a method for treating high-concentration refractory pharmaceutical wastewater, comprising the following steps:

[0039] Step 1) The high-concentration refractory pharmaceutical wastewater enters the adjustment tank for mixing adjustment of water volume and water quality: the residence time in the adjustment tank is 12-24 hours, adjust the pH between 4-7, and enter the electrolytic tank after adjustment;

[0040] The high-concentration pharmaceutical wastewater passes through the mechanical rotary grille to intercept the suspended solids and large floating solids in the wastewater to prevent the pipes and pumps from being blocked, and then enters the regulating pool. The residence time of the regulating pool is set to 12 to 24 hours. Mixing regulation to reduce the impact of water quality on the system. A submersible mixer is installed in the pool for mixing to prevent sedimentation and corrosion. An aeration mixing sys...

Embodiment 2

[0072] This embodiment provides a method for treating high-concentration refractory pharmaceutical wastewater, comprising the following steps:

[0073] Step 1) The high-concentration refractory pharmaceutical wastewater enters the adjustment tank for mixing adjustment of water volume and water quality: the residence time in the adjustment tank is 12 hours, the pH is 4, and after adjustment, it enters the electrolytic tank;

[0074] The high-concentration pharmaceutical wastewater is intercepted by the mechanical rotary grille to intercept the suspended solids and large floating solids in the wastewater to prevent the clogging of pipes and pumps, and then enters the regulating pool, and fully mixes and adjusts the volume and quality of the wastewater to reduce the impact of the water quality on the system. A submersible mixer is installed in the pool for mixing to prevent sedimentation and corrosion. An aeration mixing system is not used to prevent the toxic gas in the wastewate...

Embodiment 3

[0088] This embodiment provides a method for treating high-concentration refractory pharmaceutical wastewater, comprising the following steps:

[0089] Step 1) The high-concentration refractory pharmaceutical wastewater enters the adjustment tank for mixing adjustment of water volume and water quality: the residence time in the adjustment tank is 24 hours, the pH is 7, and after adjustment, it enters the electrolytic tank;

[0090] Step 2) Perform electrolysis in the electrolytic cell: in the electrolytic cell, a Ti-based PbO 2 plated electrode is used as the anode, and a stainless steel electrode is used as the cathode to electrodeposit heavy metals in the wastewater. The electrolysis time is 4 hours, the voltage is 4V, and the current is 6A. The COD of this embodiment The removal rate can reach 45%, remove cyanide, and heavy metals copper, lead and zinc, enter the micro-electrolysis reaction tower after electrolysis;

[0091] Step 3) Carry out micro-electrolysis reaction in ...

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Abstract

The application discloses a high-concentration difficult-to-degrade pharmaceutical wastewater treatment method and a high-concentration difficult-to-degrade pharmaceutical wastewater treatment system.The treatment method is provided with a pretreatment section and a biological reaction section, the pretreatment section adopts a dual-electrolysis process of an electrolytic cell plus a micro-electrolysis reaction tower to partially decompose and partially directly degrade difficult-to-degrade pollutants, and to remove toxic substances, and thereby a foundation is laid for biological reaction; the biological reaction section adopts a hydrolytic acidification unit, an anaerobic reactor, a high-rate aerobic tank and a P-MBR deep aerobic biochemical section. Because a P-MBR (pressurized membrane bioreactor) is adopted in the application, the pollutant retention time can be prolonged, stubborn COD (chemical oxygen demand) can be removed, the influence of toxic and harmful substances can be decreased, and the system has high impact resistance, high flexibility and good decoloration and deodorization effects.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method and system for treating high-concentration refractory pharmaceutical wastewater. Background technique [0002] The existing pharmaceutical wastewater is pretreated by advanced oxidation technology to reduce the content of organic matter, and then enters biochemical treatment, degrades COD through anaerobic reaction, enters the aerobic biological pool for further degradation of COD, and then discharges. [0003] Now the components of pharmaceutical wastewater are becoming more and more complex, the structure of pollutants is becoming more and more stable, and at the same time, the requirements for effluent are constantly increasing. The existing pretreatment process has a large amount of dosing and a large amount of sludge, which leads to a significant increase in operating costs. Subsequent Conventional biological treatment processes cannot meet the effluent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/461C02F103/34C02F101/30
CPCC02F1/46109C02F1/46176C02F1/56C02F1/66C02F3/121C02F3/284C02F3/2846C02F3/286C02F9/00C02F2001/46138C02F2101/30C02F2103/343
Inventor 宣颖邹洪波邹亚波
Owner BEIJING ANYUTONG ENVIRONMENT ENG & TECH
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