Treatment method of high concentration organophosphorus wastewater

A treatment method, organic phosphorus technology, applied in water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as narrow pH range, high chroma of wastewater, and low utilization rate , to achieve the effect of easy solid-liquid separation, low water content and rapid removal

Active Publication Date: 2017-05-31
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the existing H of the prior art Fenton oxidation 2 o 2 With the defects of low utilization rate, narrow pH application range, large amount of iron sludge, and large wastewater chroma, a treatment method for wastewater containing high concentration of organic phosphorus is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Pipette 120mL of wastewater from a fosfomycin sodium pharmaceutical factory into a conical flask, and use 0.5mol / L NaOH or H 2 SO 4 Adjust the pH to 3, add 2 mL of composite iron-aluminum modified starch flocculant with 2% starch, aluminum sulfate, ferrous sulfate and starch in a mass ratio of 10:1:1, stir well, and let stand for 2 hours.

[0024] 2. Take 100ml of the supernatant in a 250ml three-necked flask, and add 0.5mol / L of NaOH or H 2 SO 4 Adjust the pH to 9, add 4gK successively 2 S 2 o 8 , 1g of activated carbon, put the mixture into a frequency conversion microwave reactor, set the temperature at 85°C, and keep stirring for 30 minutes.

[0025] 3. Take out the mixed solution after the catalytic oxidation reaction, adjust the pH to 11 with a calcium oxide solution with a mass concentration of 50%, and let it stand for 60 minutes to clarify.

[0026] 4. Take the supernatant after calcium oxide precipitation, measure the concentration of COD and TP respe...

Embodiment 2

[0028] 1. Pipette 120ml of wastewater from a fosfomycin sodium pharmaceutical factory into a conical flask, and use 0.5mol / L NaOH or H 2 SO 4 Adjust the pH to 6, add 4ml of composite iron-aluminum modified starch flocculant with 2% starch, aluminum sulfate, ferrous sulfate and starch in a mass ratio of 8:0.5:1, fully stir, and let stand for 1h.

[0029] 2. Take 100ml of the supernatant in a 250ml three-necked flask, and use 0.5mol / L NaOH or H 2 SO 4 Adjust the pH to 3, add 2g K successively 2 S 2 o 8 , 0.5 g of activated carbon, put the mixture into a frequency conversion microwave reactor, set the temperature at 70°C, and continue stirring for 50 minutes.

[0030] 3. Take out the mixed solution after the catalytic oxidation reaction, adjust the pH to 12 with a calcium oxide solution with a mass concentration of 50%, and let it stand for 45 minutes to clarify.

[0031] 4. Take the supernatant after calcium oxide precipitation, measure the concentration of COD and TP resp...

Embodiment 3

[0033] 1. Pipette 120ml of wastewater from a fosfomycin sodium pharmaceutical factory into a conical flask, and use 0.5mol / L NaOH or H 2 SO 4 Adjust the pH to 4, add 3ml of composite iron-aluminum modified starch flocculant with 2% starch, aluminum sulfate, ferrous sulfate and starch in a mass ratio of 10.:1:1, stir well, and let stand for 1h.

[0034] 2. Take 100ml of the supernatant in a 250ml three-necked flask, and use 0.5mol / L NaOH or H 2 SO 4 Adjust the pH to 7, add 4g K successively 2 S 2 o 8 and 1g of activated carbon, put the mixture into a frequency conversion microwave reactor, set the temperature at 80°C, and keep stirring for 30 minutes.

[0035] 3. Take out the mixed solution after the catalytic oxidation reaction, adjust the pH to 11 with a calcium oxide solution with a mass concentration of 50%, and let it stand for 1 hour to clarify.

[0036] 4. Take the supernatant after calcium oxide precipitation, measure the concentration of COD and TP respectively, th...

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Abstract

The invention discloses a treatment method of high concentration organophosphorus wastewater. The total phosphorus content of the high concentration organophosphorus wastewater is in a range of 30 to 150 mg / L. The method uses a flocculation-microwave activated carbon activated potassium persulfate combined method. Through compound aluminum-iron-modified starch enhanced flocculation, microwave activated carbon activated potassium sulfate catalytic oxidation and calcium oxide precipitation treatment, chemical oxygen demand (COD) and total phosphorus content (TP) of high concentration organophosphorus wastewater are fast reduced. The method solves the problem that the traditional Fenton oxidation method has a low H2O2 utilization rate, a narrow pH application range, a large iron mud amount and large wastewater chroma. The method has the advantages of high efficiency, implementation easiness, no secondary pollution and good removal effect.

Description

technical field [0001] The invention belongs to the technical field of organic phosphorus wastewater treatment, and in particular relates to a treatment method for organic phosphorus wastewater containing high concentration. Background technique [0002] At present, there are more than 10,000 organophosphorus compounds produced in the world, mainly including phosphite, phosphate, thiophosphate, halogenated phosphate, etc., which are widely used as flame retardants, antioxidants, plasticizers, etc. Organophosphorus chemical products have become the basic varieties in the chemical industry. According to statistics, organophosphorus chemicals account for more than 40% of the total output of phosphorus chemicals in my country, and organophosphorus chemicals account for 60% of the large-tonnage varieties with an annual output of more than 10,000 tons. During the production process of organic phosphorus chemical industry, high-concentration organic phosphorus wastewater will be d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/30
CPCC02F1/283C02F1/302C02F1/5263C02F1/56C02F1/66C02F1/725C02F9/00C02F2001/007C02F2101/30
Inventor 林亲铁曾令泽姚晓声王孝武张晓峰
Owner GUANGDONG UNIV OF TECH
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