CN110655169A - Sewage treatment method for enhancing Fenton reaction by adopting activated carbon - Google Patents

Sewage treatment method for enhancing Fenton reaction by adopting activated carbon Download PDF

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CN110655169A
CN110655169A CN201910986259.0A CN201910986259A CN110655169A CN 110655169 A CN110655169 A CN 110655169A CN 201910986259 A CN201910986259 A CN 201910986259A CN 110655169 A CN110655169 A CN 110655169A
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Prior art keywords
sewage
activated carbon
sewage treatment
fenton reaction
carbon particles
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Inventor
王建
张灿
郑腾
于坤坤
李圣杰
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Weihai Cosco Shipbuilding Technology Co Ltd
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Weihai Cosco Shipbuilding Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent

Abstract

The invention discloses a sewage treatment method for strengthening Fenton reaction by adopting activated carbon, which comprises the following steps: step one, preparing activated carbon, and improving the performance of activated carbon particles; pretreating the sewage to keep the pH of the sewage at 1-4; step three, Fenton reaction treatment; step four, activated carbon strengthening treatment; and step five, measuring the effluent TOC value. The improved active carbon is added into the sewage treatment system, so that the reaction process of sewage treatment can be obviously accelerated, and the effect of sewage treatment is obviously improved.

Description

Sewage treatment method for enhancing Fenton reaction by adopting activated carbon
Technical Field
The invention relates to a sewage treatment method, in particular to a sewage treatment method for strengthening Fenton reaction by adopting activated carbon.
Background
With the rapid development of social economy, the industrialization and urbanization of human society are increasingly intensified, the problem of water pollution is more and more serious, only the waste water generated in the chemical industry every year is hundreds of billions of tons, and the waste water generated in the production of printing, medicines, intermediates and the like becomes a world-recognized difficult problem due to high concentration, high toxicity and difficult degradation, so that the continuous development of a new high-efficiency low-consumption, safe and harmless purification treatment method becomes very critical.
Taking printing and dyeing water and pharmaceutical wastewater as examples, wherein the printing and dyeing wastewater has the characteristics of deep chromaticity, high content of organic pollutants, complex components, high salt content, high biological toxicity, difficult biological degradation, strong photolysis resistance and oxidation resistance of dyes and the like, contains various organic matters with biological toxicity or three-cause (carcinogenesis, teratogenesis and mutation) performance, and has great harm to environmental pollution; the pharmaceutical wastewater has the characteristics of more harmful substances of nonbiodegradable substances, high organic pollutant concentration, large impact load, high chromaticity, heavy odor, high suspended matter concentration and the like. Based on the above characteristics, the conventional sewage treatment method is difficult to make sewage reach the discharge standard, and the amount of ferrous iron added in the fenton reaction is high, so that the yield of sludge is increased, a subsequent treatment process needs to be added, the treatment is more troublesome, and the operation cost is increased, so that the sewage treatment method adopting activated carbon to strengthen the fenton reaction is urgently needed.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a sewage treatment method for strengthening Fenton reaction by adopting activated carbon.
In order to solve the technical problems, the invention adopts the technical scheme that: a sewage treatment method for strengthening Fenton reaction by adopting activated carbon comprises the following steps:
step one, preparing activated carbon: preparing active carbon particles in advance, enabling the active carbon particles to be in a high-temperature condition of 500-1000 ℃ in a high-temperature furnace, and introducing steam to improve the performance of the active carbon particles; at the moment, carboxyl is attached to the internal structure of the activated carbon particles, so that the activated carbon particles have catalytic capacity;
step two, sewage pretreatment: adjusting the pH value of the sewage by adding dilute sulfuric acid, and finishing sewage pretreatment when the pH value of the sewage is within the range of 1-4;
step three, Fenton reaction: sequentially adding 0.01-0.1 mL/L of 30% ferrous solution and 0.01-0.5 mL/L of hydrogen peroxide into the sewage obtained in the second step, and uniformly mixing the sewage, the ferrous solution and the hydrogen peroxide in a stirring manner to obtain a sewage treatment solution;
step four, activated carbon reinforcement: introducing the sewage treatment liquid obtained in the step three into a device filled with the activated carbon particles obtained in the step one, enabling the activated carbon to be in contact with the sewage treatment liquid and react for 5-60 min, and then carrying out aeration treatment;
step five, effluent determination: and (4) determining the TOC value of the sewage after the aeration treatment is finished, and finishing the sewage treatment.
The invention discloses a sewage treatment method for strengthening Fenton reaction by adopting activated carbon, which can obviously accelerate the reaction process of sewage treatment and obviously improve the sewage treatment effect by adding improved activated carbon into a sewage treatment system. Meanwhile, the addition amount of ferrous iron and hydrogen peroxide in the Fenton reaction can be reduced, so that the production amount of iron mud is reduced, the increase of subsequent treatment processes is avoided, the process flow is saved, the sewage treatment efficiency is improved, and the operation cost can be effectively reduced.
Drawings
FIG. 1 is a comparison line graph showing the sewage treatment effect of a certain dyeing mill 1 according to one embodiment of the present invention.
FIG. 2 is a comparison line graph of the sewage treatment effect of a certain dyeing mill 2 in the second embodiment of the present invention.
FIG. 3 is a comparison line graph of the sewage treatment effect of a certain dyeing mill 3 in the second embodiment of the present invention.
FIG. 4 is a comparative line graph showing the sewage treatment effect of a pharmaceutical factory 1 according to the third embodiment of the present invention.
FIG. 5 is a comparative line graph showing the sewage treatment effect of a pharmaceutical factory 2 according to the fourth embodiment of the present invention.
FIG. 6 is a comparison line graph of the sewage treatment effect of a pharmaceutical factory 3 according to the fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A sewage treatment method for strengthening Fenton reaction by adopting activated carbon comprises the following steps:
step one, preparing activated carbon: preparing active carbon particles in advance, enabling the active carbon particles to be in a high-temperature condition of 500-1000 ℃ in a high-temperature furnace, and introducing steam to improve the performance of the active carbon particles; at the moment, carboxyl is attached to the internal structure of the activated carbon particles, so that the activated carbon particles have catalytic capacity;
step two, sewage pretreatment: adjusting the pH value of the sewage by adding dilute sulfuric acid, and finishing sewage pretreatment when the pH value of the sewage is within the range of 1-4;
step three, Fenton reaction: sequentially adding 0.01-0.1 mL/L of 30% ferrous solution and 0.01-0.5 mL/L of hydrogen peroxide into the sewage obtained in the second step, and uniformly mixing the sewage, the ferrous solution and the hydrogen peroxide in a stirring manner to obtain a sewage treatment solution;
step four, activated carbon reinforcement: introducing the sewage treatment liquid obtained in the step three into a device filled with the activated carbon particles obtained in the step one, enabling the activated carbon to be in contact with the sewage treatment liquid and react for 5-60 min, and then carrying out aeration treatment;
step five, effluent determination: and (4) determining the TOC value of the sewage after the aeration treatment is finished, and finishing the sewage treatment.
For the traditional sewage treatment method, a Fenton reagent is mostly adopted to treat the sewage, namely, ferrous sulfate and hydrogen peroxide are added into the sewage, and the reaction equation is as follows: fe2++H2O2→Fe3++(OH)-+ OH. As can be seen from the above formula, 1mol of H2O2With 1mol of Fe2+After the reaction, 1mol of Fe is generated3+Simultaneously with the formation of 1mol of OH-plus 1mol of hydroxyl radicals. It is the presence of hydroxyl radicals that gives the fenton reagent a strong oxidizing power. Taking pH of wastewater as 4 as an example, it is found by calculation that the oxidation potential of OH · radicals is as high as 2.73V. In nature, the oxidizing power is inferior to that of fluorine gas in solution, and therefore, the durability is highOrganic materials, especially aromatic compounds and some heterocyclic compounds, which are difficult to oxidize by common reagents, are all degraded by indiscriminate oxidation in the presence of fenton's reagent. Although the Fenton's reagent has excellent sewage treatment capacity, the addition of a large amount of the Fenton's reagent causes a large amount of iron sludge to be produced during the sewage treatment process, thereby increasing the subsequent treatment process, and causing Fe to be generated3+The stability and the chromaticity of the effluent quality are poor; meanwhile, the sewage which is difficult to treat, such as printing and dyeing water, pharmaceutical wastewater and the like, cannot be well deeply treated. Therefore, the sewage treatment method adopting the activated carbon to strengthen the Fenton reaction can obviously accelerate the reaction process of sewage treatment and obviously improve the sewage treatment effect by adding the activated carbon into the sewage treatment system.
The main advantages are embodied in the following points:
1) the method has the advantages of simple operation and low equipment investment, the amount of the added ferrous solution and hydrogen peroxide is lower than that of the traditional Fenton reaction, the sludge production is effectively reduced, the sewage treatment effect is improved, and the sewage treatment cost is remarkably saved.
2) Due to Fe produced3+The defects of poor water quality stability and poor chromaticity of effluent of the traditional Fenton reaction sewage treatment can be effectively improved.
3) The improved active carbon is added into the sewage treatment system, so that the reaction process of sewage treatment is obviously accelerated, and the sewage treatment effect is obviously improved.
The technical scheme of the invention is further shown by the following specific embodiments:
[ EXAMPLES one ]
The embodiment discloses a sewage treatment method for strengthening Fenton reaction by adopting activated carbon, which is used for treating sewage of a printing and dyeing mill 1, and the specific sewage treatment method comprises the following steps:
step one, preparing activated carbon: preparing active carbon particles in advance, enabling the active carbon particles to be in a high-temperature condition of 500-1000 ℃ in a high-temperature furnace, and introducing steam to improve the performance of the active carbon particles; at the moment, carboxyl is attached to the internal structure of the activated carbon particles, so that the activated carbon particles have catalytic capacity;
step two, sewage pretreatment: adjusting the pH value of the sewage by adding dilute sulfuric acid, and finishing sewage pretreatment when the pH value of the sewage is within the range of 1-4;
step three, Fenton reaction: sequentially adding 0.01-0.1 mL/L of 30% ferrous solution and 0.01-0.5 mL/L of hydrogen peroxide into the sewage obtained in the second step, and uniformly mixing the sewage, the ferrous solution and the hydrogen peroxide in a stirring manner to obtain a sewage treatment solution;
step four, activated carbon reinforcement: introducing the sewage treatment liquid obtained in the step three into a device filled with the activated carbon particles obtained in the step one, enabling the activated carbon to be in contact with the sewage treatment liquid and react for 5-60 min, and then carrying out aeration treatment;
step five, effluent determination: and (4) determining the TOC value of the sewage after the aeration treatment is finished, and finishing the sewage treatment.
According to the above sewage treatment method, the sewage of the printing and dyeing mill 1 is treated once every 7 days, and the TOC measured when the water is discharged is recorded for 10 times (sample 1 to sample 10), meanwhile, the raw water and the water treated by the traditional fenton technology are compared, the TOC values of the discharged water (sample 1 to sample 10) at the same time point are recorded, and the recording results are shown in table 1:
TABLE 1
According to the description in table 1, comparing the TOC values of the effluent of the three, as shown in fig. 1, the effect of the activated carbon enhanced fenton reaction of the present embodiment is significantly better than the effect of the conventional fenton reaction, and the effect of the present embodiment is more stable.
[ example two ]
The embodiment discloses a sewage treatment method for strengthening Fenton reaction by using activated carbon, which is used for treating sewage of a printing and dyeing mill 2, and the specific sewage treatment method is the same as that of the embodiment, similarly, sewage treatment is performed once every 7 days, TOC measured when water is discharged is recorded for 10 times (samples 1 to 10), meanwhile, raw water and water treated by the traditional Fenton technology are compared, TOC values of discharged water at the same time point (samples 1 to 10) are recorded, and the recording results are shown in Table 2:
TABLE 2
Figure BDA0002236788280000061
According to the description in table 2, comparing the TOC values of the effluent of the three, as shown in fig. 2, the effect of the activated carbon enhanced fenton reaction of the present embodiment is significantly better than the effect of the conventional fenton reaction, and the effect of the present embodiment is more stable.
[ EXAMPLE III ]
The embodiment discloses a sewage treatment method for strengthening Fenton reaction by using activated carbon, which is used for treating sewage of a printing and dyeing mill 3, and the specific sewage treatment method is the same as that of the embodiment, similarly, sewage treatment is performed once every 7 days, TOC measured when water is discharged is recorded for 10 times (samples 1 to 10), meanwhile, raw water and water treated by the traditional Fenton technology are compared, TOC values of discharged water at the same time point (samples 1 to 10) are recorded, and the recording results are shown in Table 3:
TABLE 3
Figure BDA0002236788280000062
Figure BDA0002236788280000071
According to the descriptions in table 3, comparing the TOC values of the effluent of the three, as shown in fig. 3, the effect of the activated carbon enhanced fenton reaction of the present embodiment is significantly better than the effect of the conventional fenton reaction, and the effect of the present embodiment is more stable.
[ EXAMPLE IV ]
The embodiment discloses a sewage treatment method for enhancing Fenton reaction by using activated carbon, which is used for treating sewage of a pharmaceutical factory 1, and the specific sewage treatment method is the same as that of the embodiment, in the same way, sewage treatment is performed every 7 days, TOC measured when water is discharged is recorded for 10 times (from a sample 1 to a sample 10), meanwhile, the TOC values of discharged water at the same time point (from the sample 1 to the sample 10) are recorded by comparing raw water and water treated by the traditional Fenton technology, and the recording results are shown in Table 4:
TABLE 4
Figure BDA0002236788280000072
According to the descriptions in table 4, comparing the TOC values of the effluent of the three, as shown in fig. 4, the effect of the activated carbon enhanced fenton reaction of the present embodiment is significantly better than the effect of the conventional fenton reaction, and the effect of the present embodiment is more stable.
[ EXAMPLE V ]
The embodiment discloses a sewage treatment method for enhancing Fenton reaction by using activated carbon, which is used for treating sewage of a pharmaceutical factory 2, and the specific sewage treatment method is the same as that of the embodiment, in the same way, sewage treatment is performed every 7 days, TOC measured when water is discharged is recorded for 10 times (samples 1 to 10), meanwhile, raw water and water treated by the traditional Fenton technology are compared, TOC values of discharged water at the same time point (samples 1 to 10) are recorded, and the recording results are shown in Table 5:
TABLE 5
Figure BDA0002236788280000081
According to the descriptions in table 5, comparing the TOC values of the effluent of the three, as shown in fig. 5, the effect of the activated carbon enhanced fenton reaction of the present embodiment is significantly better than the effect of the conventional fenton reaction, and the effect of the present embodiment is more stable.
[ EXAMPLE six ]
The embodiment discloses a sewage treatment method for enhancing Fenton reaction by using activated carbon, which is used for treating sewage of a pharmaceutical factory 3, and the specific sewage treatment method is the same as that of the embodiment, in the same way, sewage treatment is performed every 7 days, TOC measured when water is discharged is recorded for 10 times (samples 1 to 10), meanwhile, raw water and water treated by the traditional Fenton technology are compared, TOC values of discharged water at the same time point (samples 1 to 10) are recorded, and the recording results are shown in Table 6:
TABLE 6
Figure BDA0002236788280000082
According to the descriptions in table 6, comparing the TOC values of the effluent of the three, as shown in fig. 6, the effect of the activated carbon enhanced fenton reaction of the present embodiment is significantly better than the effect of the conventional fenton reaction, and the effect of the present embodiment is more stable.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.

Claims (1)

1. A sewage treatment method for strengthening Fenton reaction by adopting activated carbon is characterized by comprising the following steps: the sewage treatment method comprises the following steps:
step one, preparing activated carbon: preparing active carbon particles in advance, enabling the active carbon particles to be in a high-temperature condition of 500-1000 ℃ in a high-temperature furnace, and introducing steam to improve the performance of the active carbon particles; at the moment, carboxyl is attached to the internal structure of the activated carbon particles, so that the activated carbon particles have catalytic capacity;
step two, sewage pretreatment: adjusting the pH value of the sewage by adding dilute sulfuric acid, and finishing sewage pretreatment when the pH value of the sewage is within the range of 1-4;
step three, Fenton reaction: sequentially adding 0.01-0.1 mL/L of 30% ferrous solution and 0.01-0.5 mL/L of hydrogen peroxide into the sewage obtained in the second step, and uniformly mixing the sewage, the ferrous solution and the hydrogen peroxide in a stirring manner to obtain a sewage treatment solution;
step four, activated carbon reinforcement: introducing the sewage treatment liquid obtained in the step three into a device filled with the activated carbon particles obtained in the step one, enabling the activated carbon to be in contact with the sewage treatment liquid and react for 5-60 min, and then carrying out aeration treatment;
step five, effluent determination: and (4) determining the TOC value of the sewage after the aeration treatment is finished, and finishing the sewage treatment.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN88101457A (en) * 1988-03-17 1988-10-12 河南省新乡县中原化工厂 The corn cob furfural dregs is made granulated active carbon
JPH10277568A (en) * 1997-04-02 1998-10-20 Kurita Water Ind Ltd Treatment of organic matter-containing waste water
KR20000065511A (en) * 1999-04-06 2000-11-15 박창호 Disposal method dyeing wastewater
CN109019962A (en) * 2018-08-16 2018-12-18 北方工程设计研究院有限公司 A kind of processing method of refinery alkaline sewage
CN109835897A (en) * 2019-04-02 2019-06-04 四川轻化工大学 Modified distillers ' grains matrix activated carbon of a kind of metal/hetero atom and preparation method thereof
CN110182988A (en) * 2019-04-22 2019-08-30 上海老港废弃物处置有限公司 A kind of method of Fenton and activated carbon combined processing treatment of advanced stage landfill leachate

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Application publication date: 20200107