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Method for deep treatment on industrial wastewater discharged by styrene-butadiene rubber production device

A technology for industrial wastewater and advanced treatment, applied in water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. High problems, to achieve the effect of improving COD removal rate, convenient operation and maintenance, and low operating cost

Active Publication Date: 2014-04-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve a satisfactory treatment effect for the final effluent, due to the high concentration of suspended solids in the secondary biochemical effluent, the consumption of catalysts and oxidants is large, resulting in waste of chemicals and increased operating costs.
[0008] In summary, the wastewater treatment method discharged from the styrene-butadiene rubber production plant in the prior art still has the problems of high operating cost and poor quality of the treated effluent, which need to be solved

Method used

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  • Method for deep treatment on industrial wastewater discharged by styrene-butadiene rubber production device
  • Method for deep treatment on industrial wastewater discharged by styrene-butadiene rubber production device
  • Method for deep treatment on industrial wastewater discharged by styrene-butadiene rubber production device

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Experimental program
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Effect test

Embodiment 1

[0117] The COD concentration of a styrene-butadiene rubber production sewage is 1056mg / L, and the sewage is treated with 150m 3 The flow rate of / h enters figure 1 In the treatment process shown, the main process parameters of each treatment unit are: the pretreatment unit adds alkali to adjust the pH value to 9, the content of PAC and PAM is 250mg / L and 5mg / L respectively, and the air flotation residence time is 0.5h. COD: 771mg / L, COD removal rate 27%.

[0118] The sewage enters the sludge adsorption tank to remove the remaining suspended solids and colloidal particles in the pretreatment unit. The temperature in the pool is 35°C, and the residence time is 1h. After adsorption, the COD decreased to 470mg / L, and the COD removal rate reached 39%.

[0119] The wastewater after sludge adsorption enters the first-stage carrier fluidized bed. At this stage, the hydraulic retention time is 6h, the DO is 4.0mg / L, and the MLSS is 3000mg / L; the hydraulic retention time in the activ...

Embodiment 2

[0122] The COD concentration of a styrene-butadiene rubber production sewage is 950mg / L, and the sewage is treated with 200m 3 The flow rate of / h enters figure 1 In the shown treatment process, the main process parameters of each treatment unit are: the pretreatment unit adds alkali to adjust the pH value to 8.5, the contents of flocculant PAC and PAM are 250mg / L and 2mg / L respectively, and the air flotation residence time is 1.0h. The effluent COD of this unit is 741mg / L, and the COD removal rate is 22%.

[0123] The sewage enters the sludge adsorption tank to remove the remaining suspended solids and colloidal particles in the pretreatment unit. The temperature in the pool is 35°C, and the residence time is 1h. After adsorption, the COD dropped to 445mg / L, and the COD removal rate reached 40%.

[0124] The wastewater after sludge adsorption enters the first-stage carrier fluidized bed. At this stage, the hydraulic retention time is 8.0h, DO is 5.5mg / L, and MLSS is 3800mg...

Embodiment 3

[0127] The COD concentration of a styrene-butadiene rubber production sewage is 761mg / L, and the sewage is treated with 120m 3 The flow rate of / h enters figure 1 In the shown treatment process, the main process parameters of each treatment unit are: the pretreatment unit adds alkali to adjust the pH value to 7.5, the contents of flocculant PAC and PAM are 150mg / L and 2mg / L respectively, and the air flotation residence time is 1h. The unit effluent COD is 533mg / L, and the COD removal rate is 30%.

[0128] The sewage enters the sludge adsorption tank to remove the remaining suspended solids and colloidal particles in the pretreatment unit. The temperature in the pool is 30°C, and the residence time is 1h. After adsorption, COD decreased to 373mg / L, and the removal rate of COD reached 30%.

[0129] The wastewater after sludge adsorption enters the first-stage carrier fluidized bed. At this stage, the hydraulic retention time is 6.5h, the DO is 4.0mg / L, and the MLSS is 2500mg / ...

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Abstract

The invention relates to a method for deep treatment on industrial wastewater discharged by a styrene-butadiene rubber production device and belongs to the field of wastewater multilevel treatment. Water treatment devices such as a pre-treatment unit, a sludge adsorption unit, an aerobic biochemical treatment unit, a flocculation and filtration unit and a high-grade oxidation treatment unit are orderly connected and combined; and discharged wastewater treated by the above water treatment devices has COD less than or equal to 40mg / L and NH3-N less than or equal to 5mg / L. The method solves the problem that the prior art has a high treatment cost and poor treatment effects, is a deep treatment method having the advantages of stable, safe and reliable operation, high pollutant removal rate and low operation cost, and realizes stable and standard discharge of industrial wastewater produced by a styrene-butadiene rubber production device. Compared with the prior art, the method reduces a high-grade oxidation phase Fenton's reagent use amount by about 30%, improves treatment depth by 15% and has an industrial application value.

Description

technical field [0001] The invention relates to a method for advanced treatment of industrial wastewater discharged from a styrene-butadiene rubber production device, which belongs to the multi-stage treatment of wastewater. Background technique [0002] As an important chemical raw material, synthetic rubber produces waste water with high organic content, complex components, and difficult treatment, especially the waste water from styrene-butadiene rubber production, which not only contains a high concentration of organic matter, but also contains low-molecular polymers and additives added during production. At present, the treatment methods of synthetic rubber production wastewater mainly include: coagulation sedimentation method, coagulation air flotation method, electrochemical method, biological method, and advanced oxidation method, adsorption method and reverse osmosis method for advanced treatment. Due to the different processing requirements and goals, the processi...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/72C02F1/52C02F1/56
Inventor 邹宗海刘婷婷潘咸峰黄斌李波王建娜
Owner CHINA PETROLEUM & CHEM CORP
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