CN101941749B - Method for treating high-concentration copper-containing antibiotic wastewater and recovering copper by iron-carbon micro-electrolysis - Google Patents

Abstract

The invention relates to a method for treating high-concentration copper-containing antibiotic waste water and recovering copper by iron-carbon micro-electrolysis, which belongs to the field of water treatment application and resource utilization. This method takes high-concentration copper-containing antibiotic wastewater as the treatment object, and mainly uses cheap iron powder and carbon powder as raw materials. On the one hand, it reduces the organic matter load and the concentration of antibiotics in the wastewater, and on the other hand, it reduces the Cu ²⁺ in the wastewater to transform it from the liquid phase to the solid phase, thereby improving the biodegradability of the wastewater, which is a powerful biochemical method. Replenish. At the same time, press filter the residue after the reaction, incinerate the filter residue, and further purify and acidify to obtain CuCl ₂ finished product. CuCl ₂ is an indispensable catalyst raw material in the production process of the antibiotic berberine, thereby realizing the recycling of copper.

Description

A method for treating high-concentration copper-containing antibiotic wastewater and recovering copper by iron-carbon micro-electrolysis

technical field

The technology of the present invention belongs to the field of environmental protection, and in particular relates to a high-efficiency waste water treatment and recycling technology. The method can improve the biodegradability of waste water. Combining with the biochemical treatment method, it can make up for the deficiencies in the biochemical treatment method, and at the same time As an important link in the treatment process of high-concentration copper-containing antibiotic wastewater, the method can realize resource recovery of copper in wastewater, thereby greatly reducing the cost of wastewater treatment.

Background technique

Copper-containing berberine production wastewater is a typical refractory wastewater in the production of chemical synthesis drugs. It contains high concentrations of Cu ²⁺ , high concentrations of organic matter and suspended matter, large pH fluctuations, and complex components. The wastewater contains high concentrations of Cu ²⁺ and berberine, etc., which have a strong inhibitory effect on microbial activity, and it is difficult to directly carry out biochemical treatment. Appropriate physical and chemical methods must be adopted for pretreatment. Therefore, it is imperative to find a process method that is feasible in practice, relatively low in cost, and can simultaneously reduce the concentration of berberine and Cu ²⁺ .

In recent years, there have been many research reports on the treatment of various wastewater by iron-carbon micro-electrolysis. The iron-carbon micro-electrolysis technology uses iron and carbon with different electrode potentials as electrodes to form countless tiny primary batteries, and electrode reactions occur, thereby producing electrochemical effects to remove pollutants in wastewater. The process of the present invention adopts cheap iron powder and carbon powder, through the synergistic effect of reduction of iron, adsorption of carbon and redox of Fe/C primary battery, etc., simultaneously eliminates high-concentration antibiotics and Cu ²⁺ content in waste water, has It is beneficial to the further biochemical treatment of wastewater. In addition, the generated waste residue is incinerated, purified and acidified to obtain CuCl ₂ finished product, which is an indispensable raw material for the production of berberine, realizes the recycling of copper, and greatly reduces the cost of wastewater treatment.

Contents of the invention

The purpose of the present invention is to propose a treatment method that is simple, feasible, relatively low in cost, can simultaneously reduce high-concentration antibiotics and Cu ²⁺ in wastewater, and can realize resource recovery of copper.

The method for treating high-concentration copper-containing antibiotic wastewater proposed by the present invention is a physicochemical treatment method based on "iron-carbon micro-electrolysis". This method uses cheap iron powder and carbon powder as raw materials, and utilizes the synergistic effects of carbon adsorption, iron reduction, and Fe/C micro-battery redox during the treatment process. On the one hand, it reduces the organic matter load and the concentration of antibiotics in wastewater. On the one hand, the Cu ²⁺ in the wastewater can be removed by reducing the Cu ²⁺ in the wastewater to make it transform from the liquid phase to the solid phase. At the same time, press filter the residue after the reaction, mix the filtrate with domestic sewage and enter the subsequent biochemical treatment process, and incinerate the filter residue, and further purify and acidify to obtain CuCl ₂ finished product, CuCl ₂ is essential in the production process of berberine A less catalyst raw material, and then realize the recycling of copper.

The reaction device of the present invention is as shown in the accompanying drawing. Concrete method of the present invention is as follows:

The method adopts an intermittent method to treat wastewater. The copper-containing antibiotic wastewater in the water storage tank 1 enters the reactor main body 3 through the water pump 2 through the water inlet 5, and a certain amount of iron powder and carbon powder are added, and the system is fully stirred by the electric stirrer 4. After the reaction is completed, it is allowed to stand for precipitation , open the water outlet valve 6, discharge and treat the effluent and enter the further biochemical treatment unit by mixing with domestic sewage, and finally open the mud discharge outlet valve 7, and carry out processes such as pressure filtration, incineration, purification, acidification, etc. Realize the resource utilization of copper.

Features of the present invention are as follows:

1. This method integrates the reduction of iron and the adsorption process of carbon, so that the synergistic effect of iron and carbon is integrated in one system.

2. The method uses cheap iron and charcoal as raw materials, and recycles high-concentration copper in wastewater, thereby greatly reducing the cost of wastewater treatment.

3. The method adopts an intermittent method to treat high-concentration copper-containing wastewater, which makes the system easier to control.

4. The method can greatly reduce the content of antibiotics and Cu ²⁺ in the wastewater, which is beneficial to improve the biodegradability of the wastewater, and is a powerful supplement to the biochemical method.

5. This method uses raw materials that are all in powder state. On the one hand, it prevents the generated copper from being wrapped on the surface of the iron, so that the iron reacts more fully and improves the utilization rate of iron. On the other hand, it can use carbon to treat organic matter in wastewater, especially antibiotics. of adsorption.

6. The method uses a stirrer to realize uniform mixing of waste water, iron and carbon powder, which promotes the reaction and improves the reaction speed and treatment efficiency.

7. The method realizes resource recovery of CuCl ₂ by performing pressure filtration, incineration, purification or acidification on the generated waste residue.

8. The method realizes the recycling of copper by applying the recovered CuCl ₂ to the production process of antibiotics.

9. The method is simple in operation, compact in equipment, easy to operate, and practical.

The method of the invention can be used for the treatment of high-concentration copper-containing antibiotic wastewater, and can also be used for the treatment of other high-concentration copper-containing wastewater and the resource recovery and utilization of copper.

Description of drawings

1. Water storage tank 2. Water pump 3. Reactor main body 4. Electric stirrer

5. Water inlet 6. Water outlet and valve 7. Mud discharge port and valve

Detailed ways

Example 1:

Copper-containing antibiotic wastewater produced in the production process of a pharmaceutical factory. The water quality of the wastewater is: wastewater COD is about 80,000mg/L, Cu ²⁺ concentration is about 20,000mg/L, and antibiotic berberine concentration is 1700-1900mg/L. When the pH value of the wastewater is 2.0-3.0, the dosage of iron and carbon is 25g/L and 30g/L respectively, and after 90 minutes of reaction, the removal rate of berberine in the wastewater can reach more than 70%, and the removal rate of Cu ²⁺ can reach as high as 99.9% %above. The filter residue is incinerated, purified, and acidified to obtain the _CuCl2 finished product. This method and process can realize the recovery of copper 18-19kg (calculated as Cu) per ton of water.

Claims (11)

1. an iron-carbon micro-electrolysis treatment of high concentration cupric antibiotic waste water and reclaim the method for copper; It is characterized in that utilizing the adsorption of charcoal in the process, the reductive action of iron and the redoxomorphism of Fe/C microbattery; Subdue organic loading and antibiotic concentration, the Cu in the reducing waste water on the other hand in the waste water on the one hand ²⁺, make its from the liquid-phase conversion to the solid phase among, and then improved the biodegradability of waste water, reacted residue is carried out press filtration, filter residue is burned, and further purify, acidifying obtains CuCl ₂Finished product, CuCl ₂Be requisite a kind of catalyzer raw material of producing in the microbiotic Umbellatine production process, and then realize the recycle of copper.

2. method according to claim 1, this method is a process object with the cupric antibiotic waste water of high density, reduces microbiotic and Cu in the waste water ²⁺Concentration, improve the biodegradability of waste water.

3. method according to claim 1, adopting iron powder and powdered carbon, activity charcoal powder or granulated active carbon is material.

4. method according to claim 1 need fully stir in the treating processes, and one side is adsorbed microbiotic and removes, and makes the Cu in the waste water on the other hand ²⁺Be reduced into simple substance Cu fully, and then be shifted out from the liquid phase transfer.

5. method according to claim 1 possibly produce certain amount of H in the treating processes ₂, to the H that generates ₂Collect, in order to avoid cause secondary pollution, while H ₂Can be used as green energy resource utilizes again.

6. method according to claim 1 need staticly settle for some time after the iron-carbon micro-electrolysis reaction finishes, and makes solid-liquid separation.

7. method according to claim 4 is handled the back supernatant and should be mixed with the sewage of certain volume, utilizes the Fe that generates ²⁺/ Fe ³⁺Combined sewage is carried out getting into the generate subsequent metallization processes or directly getting into the generate subsequent metallization processes to the combined sewage discharging after the coagulating treatment.

8. method according to claim 1, the generate subsequent metallization processes adopts SBR, MBR, aerobic particle mud method.

9. method according to claim 1, the waste residue that produces in the process need carry out press filtration, and filter residue is collected.

10. method according to claim 1, the filter residue of collection burns, purification and acidifying, can obtain finished product CuCl ₂, realize that the resource utilization of Cu reclaims.

11. method according to claim 1, finished product CuCl ₂Can be applicable to the production technique of microbiotic Umbellatine, and then realize the recycle of Cu.

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