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Recycling technology for organophosphorus pesticide wastewater

An organophosphorus pesticide and wastewater technology, which is applied in aerobic process treatment, mechanical oscillation water/sewage treatment, water pollutants, etc. efficiency, saving water resources and protecting the environment

Inactive Publication Date: 2018-12-07
ANHUI HUAXING CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unqualified pretreatment technology of the treatment process, the wastewater often needs to be diluted with a large amount of water, resulting in the defects of large treatment equipment, low load, and high operating costs

Method used

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  • Recycling technology for organophosphorus pesticide wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of organophosphorus pesticide waste water reuse process, this process mainly comprises the following steps:

[0020] (1) Concentrate the untreated organophosphorus pesticide wastewater into the sump, pump it into the alkali solution sedimentation tank, and add 200mg / L of calcium oxide for precipitation;

[0021] (2) Put 2000mg / L ferric chloride into the above-mentioned unprecipitated waste liquid, enter the No. 1 pool of ultrasonic air flotation, discharge after air flotation, add 2300mg / L calcium hydroxide and 1500mg / L basic aluminum chloride The mixture enters the No. 2 pool of ultrasonic air flotation, and the waste water is discharged after air flotation;

[0022] (3) Pump the above-mentioned waste liquid into the adjustment tank and mix it with domestic sewage at a ratio of 1:2, pump it into the biological contact oxidation tank for 8 hours for biochemical treatment, and pump the treated waste liquid to the secondary sedimentation Larger particles of sludge...

Embodiment 2

[0024] A kind of organophosphorus pesticide waste water reuse process, this process mainly comprises the following steps:

[0025] (1) Concentrate the untreated organophosphorus pesticide wastewater into the sump, pump it into the alkali solution sedimentation tank, and add 220mg / L of calcium oxide for precipitation;

[0026] (2) Put 2400mg / L ferric chloride into the above-mentioned unprecipitated waste liquid, enter the No. 1 pool of ultrasonic air flotation, discharge after air flotation, add 2200mg / L calcium hydroxide and 1400mg / L basic aluminum chloride The mixture enters the No. 2 pool of ultrasonic air flotation, and the waste water is discharged after air flotation;

[0027] (3) Pump the above-mentioned waste liquid into the adjustment tank and mix it with domestic sewage at a ratio of 1:1.9, pump it into the biological contact oxidation tank for 5 hours for biochemical treatment, and pump the treated waste liquid to the secondary sedimentation Larger particles of slud...

Embodiment 3

[0029] A kind of organophosphorus pesticide waste water reuse process, this process mainly comprises the following steps:

[0030] (1) Concentrate the untreated organophosphorus pesticide wastewater into the sump, pump it into the alkali solution sedimentation tank, and add 180mg / L of calcium oxide for precipitation;

[0031] (2) Put 2800mg / L ferric chloride into the above-mentioned unprecipitated waste liquid, enter the No. 1 pool of ultrasonic air flotation, discharge after air flotation, add 2200mg / L calcium hydroxide and 1600mg / L basic aluminum chloride The mixture enters the No. 2 pool of ultrasonic air flotation, and the waste water is discharged after air flotation;

[0032] (3) Pump the above-mentioned waste liquid into the adjustment tank and mix it with domestic sewage at a ratio of 1:1.8, pump it into the biological contact oxidation tank for 6 hours for biochemical treatment, and pump the treated waste liquid to the secondary sedimentation Larger particles of slud...

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Abstract

The invention discloses a recycling technology for organophosphorus pesticide wastewater and relates to the technical field of wastewater treatment. The technology mainly comprises the following steps: firstly, intensively conveying untreated organophosphorus pesticide wastewater into a water collection tank and then pumping the untreated organophosphorus pesticide wastewater into a sedimentationtank and carrying out precipitation; adding a coagulant I into waste liquid which is not precipitated; conveying the mixture into an ultrasonic air-floating No. I tank; after carrying out air floating, adding a coagulant II and conveying into an ultrasonic air-floating No. II tank; after carrying out the air floating, discharging wastewater; pumping the wastewater into a regulation tank and mixingand blending with domestic sewage; after pumping into a biological contact oxidization tank and carrying out biochemical treatment, pumping into a secondary sedimentation tank and precipitating to remove sludge impurities with relatively large particles; and filtering and recycling waste liquid subjected to secondary sedimentation through a multi-grade membrane separation device. By adopting therecycling technology provided by the invention, the content of phosphorus in the organophosphorus pesticide wastewater is effectively removed, and the removal rate of COD (Chemical Oxygen Demand) andBOD5 (Biochemical Oxygen Demand 5) is improved, so that up-to-standard emission of the sewage is realized and pollution of the sewage to the environment is reduced; and the sewage is recycled and reutilized, so that water resources are saved and the environment is also protected.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a process for recycling organic phosphorus pesticide wastewater. Background technique [0002] At present, my country's pesticide production technology is relatively backward, the product yield is low, the waste water output is large, and there are many toxic substances in the waste water. The discharge of organic phosphorus pesticide wastewater into the environment not only causes water, soil and air pollution. The amount of discharge is generally particularly large. Organophosphorus pesticide wastewater has the characteristics of high chemical oxygen demand, strong toxicity, poor biochemical properties, and complex organizational structure. If it is not treated effectively before discharge, it will have irreversible consequences. Organophosphorus pesticides are currently widely used pesticides at home and abroad, but they have become the focus of attention because o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/24C02F1/36C02F1/441C02F1/442C02F1/5236C02F1/5245C02F3/02C02F9/00C02F2001/007C02F2101/306C02F2301/08
Inventor 尹仕兵李霞赵龙凯金奎汪志稳王玉贵
Owner ANHUI HUAXING CHEM IND CO LTD
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