Method for treating wastewater generated in production of hexabromocyclododecane

A technology for hexabromocyclododecane and production wastewater, which is applied in the fields of natural water body treatment, water/sewage multi-stage treatment, reduced water/sewage treatment, etc. Oxidants or catalysts are expensive, and the treatment effect cannot meet the discharge requirements, so as to improve the effect of wastewater treatment, increase the daily treatment capacity, and improve the flocculation effect.

Active Publication Date: 2013-10-09
山东默锐环境产业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. In terms of physical treatment, either the treatment cost is high and it is difficult to promote, or the treatment effect cannot meet the emission requirements
[0005] 2. In terms of biological treatment, due to the strong biological toxicity of halogenated hydrocarbons, there is no activated sludge that has a good degradation ability for halogenated hydrocarbons. Long-term operation will lead to a decrease in the activity of activated sludge, leading to the collapse of the biochemical system
[0006] 3. In terms of chemical treatment, although the advanced oxidation process (AOPs) has achieved relatively rich results in the treatment of hexabromocyclododecane wastewater, there are still some problems such as harsh treatment process conditions, expensive oxidants or catalysts required for the treatment process , needs to use Cu, Pd, Pt, etc. as reducing agents, and it is easy to cause secondary pollution of heavy metals, etc., so it is difficult to apply industrially, and cannot completely solve the problem of HBCD wastewater treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Discharge the HBCD production wastewater containing chloroform, isobutanol and a small amount of products into the regulating tank. The pH value of the wastewater is 8.5, the COD value is 12000mg / L, the bromide ion content is 6000mg / L, and the ammonia nitrogen content It is 1000mg / L. First adjust the pH value to 3 with waste sulfuric acid, transfer it to the reduction reaction tank, add a mixture of iron powder and aluminum powder with a relative waste water volume of 1Kg / t, and add sodium carbonate and magnesium sulfate with a relative waste water volume of 0.5Kg / t The mixture was reduced under stirring for 3 hours, and then the waste water after the reaction was transferred to the flocculation sedimentation tank, and sodium slag was added to adjust the pH value of the waste water to be neutral, and polyacrylamide with a relative waste water volume of 0.02Kg / t was added to make the catalytic reduction reaction The produced iron and aluminum ions form hydroxides and cau...

Embodiment 2

[0042] Discharge the HBCD production wastewater containing chloroform, isobutanol and a small amount of products into the adjustment tank. The pH of the wastewater is 9.0, the COD value is 12500mg / L, the bromide ion content is about 6350mg / L, and the ammonia nitrogen content It is 1500mg / L. First adjust the pH value to 3.5, transfer to the reduction reaction tank, add a mixture of iron powder and aluminum powder with a relative waste water volume of 2Kg / t, add a mixture of sodium sulfate and magnesium chloride with a relative waste water volume of 0.3Kg / t, and stir The reduction reaction was carried out for 3 hours, and then the waste water after the reaction was transferred to the flocculation sedimentation tank, and the pH value of the waste water was adjusted to be neutral, so that the iron and aluminum ions produced by the catalytic reduction reaction formed hydroxides, resulting in flocculation, and the supernatant after flocculation and precipitation The liquid is discha...

Embodiment 3

[0044]Discharge the HBCD production wastewater containing chloroform, isobutanol and a small amount of products into the adjustment tank. The pH of the wastewater is 9.5, the COD value is 11300mg / L, the bromide ion content is about 5900mg / L, and the ammonia nitrogen content It is 1100mg / L. First use waste sulfuric acid to adjust the pH value to 4, transfer it to the reduction reaction tank, add iron powder with a relative waste water volume of 5Kg / t, add sodium carbonate with a relative waste water volume of 0.1Kg / t, and reduce the reaction for 3-4 hours under stirring. hours, and then the waste water after the reaction is transferred to the flocculation sedimentation tank, and the pH value of the waste water is adjusted to be neutral, so that the iron and aluminum ions generated by the catalytic reduction reaction form hydroxides to produce flocculation, and the supernatant after flocculation and precipitation is discharged into the subsequent In the biochemical treatment sec...

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PUM

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Abstract

The invention discloses a method for treating wastewater generated in production of hexabromocyclododecane. The method comprises the following steps of: performing metal catalytic reduction on the wastewater by using iron powder and / or aluminum powder and adding inorganic sodium salt and / or inorganic magnesium salt which serves as a catalyst; and performing biochemical treatment. When the wastewater generated in the production of the hexabromocyclododecane, after the wastewater is subjected to the metal catalytic reduction and flocculent precipitation treatment, the biodegradability of the hexabromocyclododecane wastewater is greatly improved, the wastewater treatment effect is improved, the chemical oxygen demand (COD) in the treated wastewater is 80-120mg / L, ammonia nitrogen in the treated wastewater is less than 30mg / L, and the daily treatment capacity of a wastewater biochemical system is improved. A reducing agent has the advantages of readily available raw materials and low price, heavy metal pollution is avoided, and the wastewater treatment cost is reduced.

Description

technical field [0001] The invention relates to a technology for treating industrial wastewater, in particular to a method for treating wastewater produced by hexabromocyclododecane. Background technique [0002] Hexabromocyclododecane, referred to as HBCD or HBCDD, is an alicyclic additive flame retardant with high bromine content. The current common production process is mainly composed of 1, 5, 9-cyclododecatriene (CDDT) and bromine in several types of mixed solvents such as alcohol hydrocarbons and alkanes. During the production process, high-concentration refractory wastewater containing alcoholic hydrocarbons and halogenated alkanes and a small amount of products is produced. The existing sewage treatment process has a low treatment effect on the wastewater produced by hexabromocyclododecane, and it is difficult to discharge the sewage up to the standard. Therefore, the treatment of HBCD production wastewater has become a bottleneck in the development of the HBCD ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/70C02F1/56C02F103/36
Inventor 李建业桑强王彦玲杜忠亮周世军闫雪
Owner 山东默锐环境产业股份有限公司
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