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Biochemical disposal method for organic silicone wastewater

A technology of biochemical treatment and organic silicon, which is applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex organic silicon wastewater composition, high treatment cost, difficult biochemical and other problems, and improve the catalytic effect , large processing capacity and low cost

Active Publication Date: 2019-03-01
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a process route and method to overcome the problems of complex composition, high salt, difficult biochemical and high treatment cost of organosilicon wastewater, through iron-carbon micro-electrolysis and Fenton-like pretreatment, and two stages Biochemical and ozone catalytic oxidation combined treatment process to achieve the goal of reducing COD effluent to 100mg / l

Method used

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  • Biochemical disposal method for organic silicone wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Get the water in the homogeneous pool, the water quality table is as follows:

[0056] serial number

index

value

1

pH

8.5

2

COD

1123mg / L

[0057] 1) After the organic silicon wastewater is pretreated, the pH value is adjusted to 2 with acid, so that the COD concentration of the organic silicon wastewater is controlled at 1123 mg / L.

[0058] 2) Put the pretreated wastewater into the iron-carbon micro-electrolysis + Fenton-like advanced oxidation pool, add hydrogen peroxide with a concentration of 25%, and the mass ratio of ferrous iron is twice that of hydrogen peroxide.

[0059] 3) Step 2) After the pH value of the effluent is adjusted to 8, it enters the flocculation and sedimentation tank, and polyacrylamide with a concentration of 5 mg / L is added, and the sedimentation is clarified for 60 minutes, and CODCr is detected. At this time, the detection value of COD was 698mg / L, the average removal rate was 37.8%, and the B...

Embodiment 2

[0069] Get the water in the homogeneous pool, the water quality table is as follows:

[0070] serial number

index

value

1

pH

8.5

2

COD

1123mg / L

[0071] 1) After the organic silicon wastewater is pretreated, the pH value is adjusted to 2.5 with acid, so that the COD concentration of the organic silicon wastewater is controlled at 1123 mg / L.

[0072] 2) Put the pretreated wastewater into the iron-carbon micro-electrolysis + Fenton-like advanced oxidation pool, add hydrogen peroxide with a concentration of 30%, and the mass ratio of ferrous iron is twice that of hydrogen peroxide.

[0073] 3) Step 2) After the effluent water is adjusted to 8.8 after the pH value, it enters the flocculation sedimentation tank, and polyacrylamide with a concentration of 5 mg / L is added, the sedimentation is clarified for 60 minutes, and CODCr is detected. At this time, the detection value of COD was 620mg / L, the average removal rate was 44.8%, and ...

Embodiment 3

[0083] Get the water in the homogeneous pool, the water quality table is as follows:

[0084] serial number

index

value

1

pH

8.5

2

COD

1123mg / L

[0085] 1) After the organic silicon wastewater is pretreated, acid is used to adjust the pH value to 3, so that the COD concentration of the organic silicon wastewater is controlled at 1123 mg / L.

[0086] 2) Put the pretreated wastewater into the iron-carbon micro-electrolysis + Fenton-like advanced oxidation pool, add hydrogen peroxide with a concentration of 35%, and the mass ratio of ferrous iron is twice that of hydrogen peroxide.

[0087] 3) Step 2) After the pH value of the effluent is adjusted to 9, it enters the flocculation sedimentation tank, and polyacrylamide with a concentration of 5 mg / L is added, and the sedimentation is clarified for 70 minutes, and CODCr is detected. At this time, the detection value of COD was 607mg / L, the average removal rate was 46.4%, and the B / C ...

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Abstract

The invention relates to a biochemical disposal method for organic silicone wastewater. The method includes predisposal and combination of iron carbon microelectrolysis and FENTON-like advanced catalytic oxidation in order to increase the B / C value, and effluent water enters a flocculation sedimentation tank after the pH is adjusted and then sequentially enters a first-stage circulated flow biofilm hydrolysis acidification tank, a first-stage bio-multiplying biofilm aerobic reaction tank and a first-stage sedimentation tank; mud and the water in the sedimentation tank are separated from each other, a supernatant liquid enters an ozone catalytic oxidation tower and then sequentially enters a second-stage circulated flow biofilm hydrolysis acidification tank and a second-stage bio-multiplying biofilm aerobic reaction tank for biological disposal, and the effluent water is discharged from a second-stage sedimentation tank and satisfies standards. The method has the advantages that it is greatly ensured that discharge of the wastewater stably satisfies the standards, the cost for traditional physical and chemical disposal is greatly reduced, and a new idea is provided for the disposalof the organic silicon wastewater.

Description

technical field [0001] The invention belongs to the field of industrial sewage treatment, and relates to a method for treating organic silicon wastewater by adopting a two-stage biochemical treatment combined process. Background technique [0002] Silicone material is a new type of material, which belongs to "industrial monosodium glutamate" in the national industrial system, occupies an important position, and is widely used in construction, automobile, daily use, medicine, aerospace, military and other industries. However, with the increasing demand for organosilicon, the production capacity of organosilicon devices is also expanding randomly, and the problem of wastewater treatment is also becoming more and more serious. The main pollutants in organic silicon wastewater are: COD, PH (acid), SS, NH 3 -N, high salt (mainly chlorine salt), etc., in which the main component of COD is siloxane organic matter, molecular formula: (R 2 SiO)x, linear, cyclic or cross-linked poly...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30
CPCC02F9/00C02F1/56C02F1/722C02F1/725C02F1/78C02F1/66C02F1/461C02F1/24C02F2101/30C02F3/1268C02F2301/08C02F2305/026
Inventor 黎剑高占峰刘观称
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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