A kind of biochemical treatment method of organosilicon wastewater

A biochemical treatment, organosilicon technology, applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex composition of organosilicon wastewater, high treatment cost, difficult biochemical, etc., to improve the catalytic effect , strengthen the treatment effect, the effect of low cost

Active Publication Date: 2022-01-28
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Application Information

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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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  • A kind of biochemical treatment method of organosilicon 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 / C increased to ...

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 the B / C increase...

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 organosilicon wastewater is pretreated, acid is used to adjust the pH value to 3, so that the COD concentration of the organosilicon 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 effluent is adjusted to a pH value of 9, it enters the flocculation sedimentation tank, and polyacrylamide with a concentration of 5mg / 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 increased to 0.327mg / L....

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Abstract

The invention relates to a biochemical treatment method of organic silicon wastewater, including pretreatment, iron-carbon micro-electrolysis + FENTON-like advanced catalytic oxidation to increase the B / C value, and the effluent enters the flocculation sedimentation tank after adjusting the pH, and then enters The first-stage circulating flow biofilm hydrolysis acidification tank, the biomultiplication biofilm aerobic reaction tank, and then enters the sedimentation tank, the mud and water in the sedimentation tank are separated, the supernatant enters the ozone catalytic oxidation tower, and then enters the second-stage circulating flow biofilm hydrolysis acidification tank, two The biological multiplication biofilm aerobic reaction tank is used for biochemical treatment, and the effluent is discharged through the secondary sedimentation tank up to the standard. The invention has the advantages of greatly ensuring the stable and up-to-standard discharge of waste water, and at the same time greatly reducing the cost of traditional physical and chemical treatment, and providing a new idea for the treatment of organic silicon waste water.

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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Patent Type & Authority Patents(China)
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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