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Treatment method of bromine-containing organic wastewater

A treatment method and technology for organic waste water are applied in the field of treatment of refractory bromine-containing waste water, which can solve the problems of difficult treatment of catalyst waste residues, large acid/base consumption, large amount of oxidant, etc., so as to improve electrolysis efficiency, oxidation efficiency, and reaction Fast, highly oxidative effect

Pending Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the use of catalytic oxidation process to treat refractory wastewater still has problems such as large amount of oxidizing agent, high cost, high acid / alkali consumption, and difficult disposal of catalyst waste residue.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Treatment of bromine-containing wastewater from a catalyst plant. The COD of the wastewater is 505.1mg / L, the B / C is 0.05, the pH value is 8.6, and the bromide ion concentration is 2000mg / L. The operating conditions are determined as follows: the electrochemical treatment unit uses graphite as the positive electrode, stainless steel as the negative electrode, the current intensity is 30A, the residence time of the wastewater in the reactor is 15 minutes, the COD after treatment is 123.9mg / L, and the B / C of the wastewater is 0.35 .

Embodiment 2

[0037] Treatment of bromine-containing wastewater from a chemical plant. The COD of wastewater is 902.7mg / , B / C is 0.03, pH value: 5.5, bromide ion concentration is 1900mg / L. The operating conditions are determined as follows: the electrochemical treatment unit uses graphite as the positive electrode, stainless steel as the negative electrode, the current intensity is 200A, the residence time of the wastewater in the reactor is 35 minutes, and the B / C of the treated wastewater is 0.32.

Embodiment 3

[0039] Treat a pesticide production wastewater, the COD of the wastewater is 640mg / L, the pH value is 11.2, and the B / C is 0.05. According to the ratio of 1:1, it is mixed with bromine-containing wastewater with a bromine ion concentration of 4455.2mg / L and a pH value of 4.6. The pH value of the wastewater after mixing is 9.0. The operating conditions are determined as follows: graphite is used as the positive electrode, stainless steel is used as the negative electrode, the current intensity is 40A, the residence time of the wastewater in the reactor is 30 minutes, the COD after treatment is reduced to 76.8mg / L, and the B / C is 0.41.

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Abstract

The invention discloses a treatment method of degradation-resistant bromine-containing organic wastewater. The method comprises the following steps: adding bromine-containing organic wastewater into an electrolytic reactor; switching on the power supply connected to positive electrode and negative electrode of the electrolytic reactor, carrying out reactions for a while so that bromine ions in thewastewater are oxidized into bromine, and quickly carrying out reactions between bromine and water to generate strongly oxidative hypobromous acid. Hypobromous acid can oxidize and degrade refractoryorganic matters in the wastewater, so that COD of wastewater is reduced, and biodegradability of wastewater is improved. After the wastewater is treated by the method, refractory organic matters in the wastewater are greatly reduced, B / C is improved, the treated wastewater can independently enter a biochemical system or the treated wastewater can be mixed with other wastewater before entering a biochemical system.

Description

technical field [0001] The invention relates to a treatment method for wastewater, especially a treatment method for refractory bromine-containing wastewater Background technique [0002] In the chemical production process of pharmaceuticals, pesticides, catalysts, etc., high-concentration bromine-containing organic wastewater is often produced. This type of wastewater has high salt and bromine content and poor biodegradability. At present, the treatment of this kind of wastewater usually adopts biochemical treatment after mixing with a large amount of other wastewater. However, due to the high salt content and poor biochemical properties of this type of wastewater, mixing with other wastewater not only affects the reuse of wastewater, but also impacts the biochemical system and affects the treatment effect of the entire sewage treatment plant. Therefore, separate treatment of this type of wastewater is required. [0003] For a long time, the treatment of refractory organi...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/467C02F1/76C02F101/12
CPCC02F1/461C02F1/4674C02F1/766C02F2101/12
Inventor 高峰马欣赵锐
Owner CHINA PETROLEUM & CHEM CORP
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