Advanced treatment method for pesticide industrial wastewater

An advanced treatment and pesticide technology, applied in the field of quinafos pesticide wastewater treatment, can solve the problems of wastewater CODcr difficulty, unable to meet the discharge standards, etc., achieve the effect of no secondary pollution, low labor intensity of workers, and achieve discharge standards

Active Publication Date: 2010-06-23
CEEP CO LTD
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Problems solved by technology

From the point of view of actual effect, the hydrolysis and contact oxidation pretreatment-pre-denitrification A / O biochemical process has the best effluent effect, and can achieve the wastewater ammonia nitrogen treatment up to the standard, but because the wastewater contains soluble, non-biodegradable and refractory organic components, making it difficult It is difficult to reduce the CODcr of wastewater after treatment to below 180-200mg / l, and the discharge cannot meet the standard

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  • Advanced treatment method for pesticide industrial wastewater
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Embodiment Construction

[0009] The steps are as follows: the process flow diagram is as follows figure 1 .

[0010] a) Continuous dynamic adsorption of Quetiafos pesticide production wastewater and magnetic resin after aerobic biochemical treatment. The upflow suspended bed magnetic resin contact reactor is used as the adsorption reactor, and the water is continuously fed in and out. The temperature of the incoming water is controlled at 15-30°C, PH6-9, CODcr≯200mg / l, and the ratio of water flow (inlet and outlet water: of magnetic resin) Weight)≯66.7:1. Effluent, CODcr≤50mg / l, up to standard discharge. Of course, the lower the influent flow rate, the better the effect of water treatment can be guaranteed. After the aerobic biochemical treatment, the wastewater produced by Quetiaphos pesticide is continuously and dynamically adsorbed by the magnetic resin. For example, the wastewater produced by Quetiaphos pesticide is reduced from 180-200 mg / l mg / l CODcr at the influent to 50 mg / l;

[0011] b) P...

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Abstract

The invention relates to an advanced treatment method of pesticide industrial wastewater, particularly advanced treatment of quinalphos pesticide wastewater processed by biochemical treatment technique. The method comprises the following steps: carrying out continuous dynamic adsorption on quinalphos pesticide production wastewater, which is processed by aerobic biochemical treatment, and the magnetic resin: using the upflow type suspension bed magnetic resin contact reactor as the adsorption reactor, and continuously driving the water in and out of the adsorption reactor, wherein the temperature of the inflow water is controlled to be at a range of 15-30 DEG C, the pH value is 6-9, the CODcr is not greater than 200 mg / l, and the water flowing propart is not greater than 66.7:1; discharging water, wherein the CODcr is equal to or smaller than 50 mg / l; and continuously drawing part of the magnetic resin out of the contact reactor for dynamic regeneration, and continuously supplementing the magnetic resin after regeneration. The invention can effectively separate non-biochemical refractory organic matters remaining after biochemical treatment of quinalphos pesticide, so that the CODcr of the discharged water obtained by treating the quinalphos pesticide wastewater is reduced from the routine value 180-200 mg / l to 50 mg / l, which meets the discharge index of reuse water.

Description

technical field [0001] The invention relates to an advanced treatment method for pesticide industrial waste water, in particular to a treatment method for quinthion pesticide waste water. Background technique [0002] Quinthion pesticide production process will produce a large amount of wastewater. The current industrial treatment process includes physical and chemical pretreatment and biochemical treatment, of which biochemical treatment includes tower biofilter, A / O biochemical process, pure oxygen aeration biochemical process, membrane contact Oxidation biochemical process, hydrolysis and contact oxidation pretreatment - pre-denitrification A / O biochemical process. From the point of view of actual effect, the hydrolysis and contact oxidation pretreatment-pre-denitrification A / O biochemical process has the best effluent effect, and can achieve the wastewater ammonia nitrogen treatment up to the standard, but because the wastewater contains soluble, non-biodegradable and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/02C02F1/28C02F1/52C02F103/36
CPCY02W10/10
Inventor 刘海洪周桃红
Owner CEEP CO LTD
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