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A method for improving the biodegradability of organosilicon wastewater by two-stage ozone catalytic oxidation

A technology of ozone catalytic oxidation and ozone catalysis, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problem of failure to meet comprehensive wastewater discharge standards, failure to meet primary discharge standards, and increased sludge disposal Cost and other issues, to achieve the effect of improving biodegradability, enhancing catalytic effect, and saving operating costs

Active Publication Date: 2019-09-24
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some organic silicon enterprises basically use physical and chemical treatment of organic silicon wastewater, the treatment cost is extremely high and cannot meet the standard stably, so it is only suitable for small-scale organic silicon production enterprises
A very small number of enterprises using biochemical treatment can only treat COD=300mg / l, which cannot meet the requirements of the "Comprehensive Wastewater Discharge Standard"
[0004] Prior art CN101759329A discloses a treatment method for organosilicon wastewater, which mentions the use of iron-carbon micro-electrolysis, a first-stage aerobic pool, a first-stage aerobic pool, and a second-stage aerobic pool. A large amount of sludge is produced, which needs to be treated as hazardous waste, resulting in an increase in cost, while the result of biochemical treatment can only meet the second-level national comprehensive sewage discharge standard, and cannot meet the first-level discharge standard
CN102001775A discloses a pretreatment process for organosilicon wastewater. It mentions the use of iron-carbon and Fenton processes. Only the pretreatment part produces a large amount of sludge, which increases the disposal cost of sludge and reaches the third-level standard of the national comprehensive sewage discharge standard. , did not continue to reach the first-level emission standard
CN102976537A discloses a comprehensive physical and chemical treatment device and method for organosilicon wastewater. It is mentioned that ultraviolet light irradiation is used in the treatment of large amounts of industrial sewage, which is immature and consumes power, and the cost is high

Method used

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  • A method for improving the biodegradability of organosilicon wastewater by two-stage ozone catalytic oxidation
  • A method for improving the biodegradability of organosilicon wastewater by two-stage ozone catalytic oxidation
  • A method for improving the biodegradability of organosilicon wastewater by two-stage ozone catalytic oxidation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After the organic silicon wastewater is pretreated, the pH value of the wastewater is adjusted to 6.8, so that the COD concentration of the organic silicon wastewater is controlled at 990mg / L;

[0031] serial number index value 1 pH 6 2 COD 990mg / l 3 BOD ≈0

[0032] Raw water with a pH of 6-8 enters the first-stage ozone catalytic oxidation tower, and the effluent is tested for COD. At this time, the detected value of COD is 835 mg / l, the value of BOD is 251 mg / l, the value of B / C is 0.301, and the removal rate of COD is 15.65%.

[0033] Among them, the first-stage ozone catalytic oxidation tower is filled with ozone catalytic oxidizer, which includes ZSM-5 molecular sieve, manganese oxide, copper oxide and ferric oxide with a mass ratio of 1:0.4:0.3:0.15.

[0034] The effluent is introduced into a section of circulating flow biofilm hydrolysis acidification tank and biomultiplication biofilm aerobic reaction tank, wherein the eff...

Embodiment 2

[0041] After the organic silicon wastewater is pretreated, the pH value of the wastewater is adjusted to 6.5, so that the COD concentration of the organic silicon wastewater is controlled at 983mg / L;

[0042]

[0043]

[0044] The raw water pH=6.5 enters the first-stage ozone catalytic oxidation tower, and the effluent is tested for COD. At this time, the detected value of COD is 820mg / l, the value of BOD is 261mg / l, the value of B / C is 0.318, and the removal rate of COD is 16.58%.

[0045] Among them, the first-stage ozone catalytic oxidation tower is filled with ozone catalytic oxidizer, which includes ZSM-5 molecular sieve, manganese oxide, copper oxide and ferric oxide with a mass ratio of 1:0.5:0.35:0.15.

[0046] The effluent is introduced into a section of circulating flow biofilm hydrolysis acidification tank and biomultiplication biofilm aerobic reaction tank, in which effluent COD=128mg / l, COD removal rate is 84.4%, BOD=0, B / C=0.

[0047] The effluent is precip...

Embodiment 3

[0053] 1) After the organic silicon wastewater is pretreated, the pH value of the wastewater is adjusted to 6.8, so that the COD concentration of the organic silicon wastewater is controlled at 976mg / L;

[0054] serial number index value 1 pH 6.8 2 COD 976mg / l 3 BOD 0

[0055] Raw water with a pH of 6.8 enters the first-stage ozone catalytic oxidation tower, and the effluent is tested for COD. At this time, the detected value of COD is 776mg / l, the value of BOD is 295mg / l, the value of B / C is 0.38, and the removal rate of COD is 20.50%.

[0056] Among them, the first-stage ozone catalytic oxidation tower is filled with ozone catalytic oxidizer, which includes ZSM-5 molecular sieve, manganese oxide, copper oxide and ferric oxide with a mass ratio of 1:0.6:0.45:0.15.

[0057] The effluent is introduced into a section of circulating flow biofilm hydrolysis acidification tank and biomultiplication biofilm aerobic reaction tank, in which effl...

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Abstract

The invention discloses a method for improving biodegradability of organic silicon wastewater through two stages of ozone catalytic oxidation. The two stages of ozone catalytic oxidation are adopted for wastewater at different treatment stages, a two-stage biochemical treatment process is adopted, the two stages of ozone catalytic oxidation are set before two stages of biochemical treatment, thusby adopting an ozone catalytic oxidation process before the two stages of biochemical treatment, the biodegradability of the wastewater is improved, the purpose of decreasing effluent COD to 100 mg / lis achieved, the treatment cost is low, and operation is easy.

Description

technical field [0001] The invention belongs to the field of industrial sewage treatment and relates to a method for improving the biodegradability of organic silicon wastewater by adopting two-stage ozone catalytic oxidation. 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, as the demand for organosilicon increases day by day, 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, a linear, cyclic o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F9/14C02F101/30
Inventor 黎剑高占峰刘观称
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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