CN111925008A - Ozone treatment process for advanced sewage treatment - Google Patents
Ozone treatment process for advanced sewage treatment Download PDFInfo
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- CN111925008A CN111925008A CN202010762545.1A CN202010762545A CN111925008A CN 111925008 A CN111925008 A CN 111925008A CN 202010762545 A CN202010762545 A CN 202010762545A CN 111925008 A CN111925008 A CN 111925008A
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- ozone
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- wastewater treatment
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/763—Devices for the addition of such compounds in gaseous form
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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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention is suitable for the technical field of sewage treatment, and provides an ozone treatment process for advanced sewage treatment. The ozone adding device is used for improving the contact surface of ozone and water, improving the utilization rate of ozone, reducing the ozone oxidation time, reducing the tank capacity of the reaction tank and fully utilizing ozone.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an ozone treatment process for advanced sewage treatment.
Background
Municipal sewage includes domestic sewage, industrial wastewater and runoff sewage in the urban area. Domestic sewage is mainly discharged water generated by various kitchen water, washing water and toilet water used in human life, and is mostly nontoxic inorganic salts. The domestic sewage also contains a large amount of organic matters, such as cellulose, starch, sugar, fat protein and the like; also frequently contain pathogenic bacteria, viruses and parasite eggs; chlorides, sulfates, phosphates, bicarbonates, and sodium, potassium, calcium, magnesium, and the like, of inorganic salts. The total characteristics are that the nitrogen and the phosphorus are high, and the malodorous substances are easy to generate under the action of anaerobic bacteria.
At present, most cities are provided with sewage treatment points to treat domestic sewage and then discharge the treated domestic sewage to the outside so as to protect the ecological environment. The domestic sewage of urban residents enters a domestic sewage treatment plant through a pipeline, and is changed into clean and pollution-free water through the processes of oxygenation, stirring, fermentation, precipitation and the like, so that the river channel and urban water sources are protected, and the environment is protected. However, in the process of treating domestic sewage, a large amount of solid impurities are generated due to precipitation, chemical reaction and the like, and the solid impurities are precipitated, so that a large amount of sludge is generated. The sludge contains a large amount of organic matters and nitrogen, phosphorus and potassium elements, and the COD value is higher, so that the sludge can not reach the national emission standard far away.
Disclosure of Invention
The invention provides an ozone treatment process for advanced sewage treatment, and aims to solve the problems in the prior art.
The invention is realized in such a way that an ozone treatment process for advanced wastewater treatment comprises the following steps:
s1, filtering impurities in the sewage through a grating, and inputting the sewage into a sedimentation tank;
s2, precipitating the sewage in a precipitation tank, and inputting the supernatant after precipitation into an ozone oxidation tower;
s3, introducing ozone into the ozone oxidation tower for at least two times to carry out oxidation for at least two times;
s4, inputting the sewage after ozone oxidation into a flocculation tank, adding a flocculating agent into the flocculation tank, and stirring for flocculation;
s5, inputting the sewage in the flocculation tank into a disinfection tank, and introducing chlorine into a disinfection part for disinfection;
and S6, outputting the disinfected sewage as domestic water.
Preferably, the width of the filtration pores of the grid is 10 mm.
Preferably, the pH value of the sewage is adjusted to be 5-6 before the sewage is input into the sedimentation tank.
Preferably, the ozone is introduced into the ozone oxidation tower through an ozone adding device, the ozone is input into the ozone oxidation tower through at least one air outlet pipe immersed in the sewage, and the pipe wall of the air outlet pipe is provided with a plurality of air outlet holes.
Preferably, in step S4, the pressure in the ozone oxidation tower is maintained at 1.05MPa to 1.15PMa while the ozone is introduced, and the time for each oxidation reaction is maintained at 1h to 1.5 h.
Preferably, in step S6, the disinfected sewage is filtered by an activated carbon filter tower before being output.
Preferably, the method further comprises step S7: and taking out sludge in the sedimentation tank and the flocculation tank, and dehydrating and drying.
Preferably, the flocculant is an organic flocculant and is one or more of polyacrylamide, sodium polyacrylate, polyvinyl pyridinium and polyethyleneimine
Compared with the prior art, the invention has the beneficial effects that: the invention relates to an ozone treatment process for advanced sewage treatment, which comprises the steps of sequentially filtering impurities in sewage through a grid, inputting the sewage into a sedimentation tank, precipitating the sewage in the sedimentation tank, inputting precipitated supernatant into an ozone oxidation tower, introducing ozone into the ozone oxidation tower for at least two times for oxidation, inputting the sewage after ozone oxidation into a flocculation tank, adding a flocculating agent into the flocculation tank, stirring and flocculating, inputting the sewage in the flocculation tank into a disinfection tank, introducing chlorine into a disinfection part for disinfection, and finally outputting the disinfected sewage as domestic water, so that the removal rate of COD is improved by inputting ozone for multiple times, the utilization rate of ozone is improved, and the operation cost is also reduced.
Drawings
FIG. 1 is a schematic flow diagram of an ozone treatment process for advanced wastewater treatment according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, the present embodiment provides a technical solution: an ozone treatment process for advanced wastewater treatment, which comprises the following steps:
and S1, filtering impurities in the sewage through a grating and then inputting the sewage into a sedimentation tank. The width of the filtration pores of the grid is 10 mm. And (3) adjusting the pH value of the sewage to 5-6 before the sewage is input into the sedimentation tank. The sedimentation tank is provided with a plurality ofly, and divide into two sets ofly, and use simultaneously, draw at needs and transport before, stop using one of them set of sedimentation tank, and carry out mud to this set of sedimentation tank and draw the fortune, after the mud operation industry of this set of sedimentation tank was accomplished, use this set of sedimentation tank to store sewage, and stop the use of another set of sedimentation tank, carry out mud to another set of sedimentation tank and draw the fortune next, draw and transport the completion back, use two sets of sedimentation tanks to deposit the operation simultaneously.
S2, precipitating the sewage in a precipitation tank, and inputting the supernatant after precipitation into an ozone oxidation tower.
And S3, introducing ozone into the ozone oxidation tower twice to carry out oxidation twice. Ozone is introduced into the ozone oxidation tower through the ozone adding device, and is input through at least one air outlet pipe immersed in the sewage, and the pipe wall of the air outlet pipe is provided with a plurality of air outlet holes. When ozone is introduced, the pressure in the ozone oxidation tower is kept between 1.10MPa and 1.15PMa, and the time of each oxidation reaction is 1 to 1.5 hours. The air outlet pipe is a PVC pipe.
S4, inputting the sewage after ozone oxidation into a flocculation tank, adding a flocculating agent into the flocculation tank, and stirring for flocculation. The flocculating agent adopts an organic flocculating agent and adopts polyacrylamide. In other embodiments, the flocculating agent may also employ one or more of sodium polyacrylate, polyvinyl pyridinium, polyethyleneimine.
The sewage is flocculated in the flocculation tank to generate sludge, the sludge in the flocculation tank is discharged into the transfer sludge tank within a certain period I, and the sludge in the transfer sludge tank is fished out and transported away within a certain period II. Wherein the concentration of the flocculating agent is 5-8 ppm. In this embodiment, the amount of the flocculant is 6ppm, and the flocculant is added to flocculate the dead bacteria, colloids, algae, macromolecular organic substances originally contained in the water, and iron hydroxide colloids generated by oxidation of ozone into large particles. The sedimentation rate of suspended matters in the water body is accelerated through the flocculating agent, the flocculation time is prolonged, the working efficiency of subsequent treatment is improved, and meanwhile, the load of the subsequent treatment is reduced.
S5, inputting the sewage after ozone oxidation into a disinfection tank, and introducing chlorine into the disinfection place for disinfection.
And S6, outputting the disinfected sewage as domestic water. Filtering the disinfected sewage by an active carbon filter tower before outputting.
And S7, taking out the sludge in the sedimentation tank and the flocculation tank, and dehydrating and drying the sludge. And moreover, after being treated by a deodorization device, odor generated in the sewage treatment process is discharged into the atmosphere, the deodorization device adopts an active carbon adsorption tower with a plurality of active carbon adsorption layers to perform gas deodorization, and a gas collection pipeline and a tower body of the active carbon adsorption tower are both made of glass fiber reinforced plastic materials. The activated carbon is a very good adsorbent, has the characteristics of large surface area, strong adsorption, high purity, high filtration speed, stable quality, flocculation effect, filter aid effect and the like, so that the activated carbon layer can adsorb harmful gas, the gas to be exhausted is effectively purified, odor molecules of the gas are reduced, and the pollution to the atmosphere is reduced.
Example 2
The embodiment provides a technical scheme: an ozone treatment process for advanced wastewater treatment, which comprises the following steps:
and S1, filtering impurities in the sewage through a grating and then inputting the sewage into a sedimentation tank. The width of the filtration pores of the grid is 10 mm. And (3) adjusting the pH value of the sewage to 5-6 before the sewage is input into the sedimentation tank. The sedimentation tank is provided with a plurality ofly, and divide into two sets ofly, and use simultaneously, draw at needs and transport before, stop using one of them set of sedimentation tank, and carry out mud to this set of sedimentation tank and draw the fortune, after the mud operation industry of this set of sedimentation tank was accomplished, use this set of sedimentation tank to store sewage, and stop the use of another set of sedimentation tank, carry out mud to another set of sedimentation tank and draw the fortune next, draw and transport the completion back, use two sets of sedimentation tanks to deposit the operation simultaneously.
S2, precipitating the sewage in a precipitation tank, and inputting the supernatant after precipitation into an ozone oxidation tower.
And S3, introducing ozone into the ozone oxidation tower twice to carry out oxidation twice. Ozone is introduced into the ozone oxidation tower through the ozone adding device, and is input through at least one air outlet pipe immersed in the sewage, and the pipe wall of the air outlet pipe is provided with a plurality of air outlet holes. When ozone is introduced, the pressure in the ozone oxidation tower is kept between 1.10MPa and 1.15PMa, and the time of each oxidation reaction is 1 to 1.5 hours. The air outlet pipe is a PVC pipe.
S4, inputting the sewage after ozone oxidation into a flocculation tank, adding a flocculating agent into the flocculation tank, and stirring for flocculation. The flocculant adopts an organic flocculant and adopts 1: 1 and mixing.
The sewage is flocculated in the flocculation tank to generate sludge, the sludge in the flocculation tank is discharged into the transfer sludge tank within a certain period I, and the sludge in the transfer sludge tank is fished out and transported away within a certain period II. Wherein the concentration of the flocculating agent is 5-8 ppm. In the present embodiment, the amount of the flocculant added is 7 ppm.
S5, inputting the sewage after ozone oxidation into a disinfection tank, and introducing chlorine into the disinfection place for disinfection.
And S6, outputting the disinfected sewage as domestic water. Filtering the disinfected sewage by an active carbon filter tower before outputting.
And S7, taking out the sludge in the sedimentation tank and the flocculation tank, and dehydrating and drying the sludge. Moreover, the odor generated in the sewage treatment process is discharged into the atmosphere after being treated by the deodorization device.
In summary, according to the ozone treatment process for advanced wastewater treatment provided by the invention, wastewater is sequentially subjected to impurity filtration through a grating and then is input into a sedimentation tank, the wastewater is precipitated in the sedimentation tank, the precipitated supernatant is input into an ozone oxidation tower, ozone is introduced into the ozone oxidation tower for at least two times for oxidation, the wastewater after ozone oxidation is input into a flocculation tank, a flocculating agent is added into the flocculation tank, stirring and flocculation are performed, the wastewater in the flocculation tank is input into a disinfection tank, chlorine is introduced into a disinfection part for disinfection, and finally the disinfected wastewater is output as domestic water, so that the removal rate of COD is improved through multiple times of ozone input, the utilization rate of ozone is improved, and the operation cost is also reduced. Adopt ozone to throw feeder apparatus and be used for promoting the contact surface of ozone and water, improve the utilization ratio of ozone, reduce ozone oxidation time, reduce the reaction tank pond and hold, ability make full use of ozone reduces the running cost, and it is higher to go out water DO.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An ozone treatment process for advanced wastewater treatment, which is characterized in that: the method comprises the following steps:
s1, filtering impurities in the sewage through a grating, and inputting the sewage into a sedimentation tank;
s2, precipitating the sewage in a precipitation tank, and inputting the supernatant after precipitation into an ozone oxidation tower;
s3, introducing ozone into the ozone oxidation tower for at least two times to carry out oxidation for at least two times;
s4, inputting the sewage after ozone oxidation into a flocculation tank, adding a flocculating agent into the flocculation tank, and stirring for flocculation;
s5, inputting the sewage in the flocculation tank into a disinfection tank, and introducing chlorine into a disinfection part for disinfection;
and S6, outputting the disinfected sewage as domestic water.
2. The ozone treatment process for advanced wastewater treatment as claimed in claim 1, wherein: the width of the filtration pores of the grid is 10 mm.
3. The ozone treatment process for advanced wastewater treatment as claimed in claim 1, wherein: and before the sewage is input into the sedimentation tank, adjusting the pH value of the sewage to 5-6.
4. The ozone treatment process for advanced wastewater treatment as claimed in claim 1, wherein: ozone is introduced into the ozone oxidation tower through the ozone adding device, and is input through at least one air outlet pipe immersed in the sewage, and a plurality of air outlet holes are formed in the pipe wall of the air outlet pipe.
5. The ozone treatment process for advanced wastewater treatment as claimed in claim 1, wherein: in step S4, when ozone is introduced, the pressure in the ozone oxidation tower is kept between 1.05MPa and 1.15PMa, and the time of each oxidation reaction is kept between 1 hour and 1.5 hours.
6. The ozone treatment process for advanced wastewater treatment as claimed in claim 1, wherein: in step S6, the disinfected sewage is filtered by an activated carbon filter tower before being discharged.
7. The ozone treatment process for advanced wastewater treatment as claimed in claim 1, wherein: further comprising step S7: and taking out sludge in the sedimentation tank and the flocculation tank, and dehydrating and drying.
8. The ozone treatment process for advanced wastewater treatment as claimed in claim 1, wherein: the flocculant is an organic flocculant and is one or more of polyacrylamide, sodium polyacrylate, polyvinyl pyridinium and polyethyleneimine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010762545.1A CN111925008A (en) | 2020-07-31 | 2020-07-31 | Ozone treatment process for advanced sewage treatment |
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| CN202010762545.1A CN111925008A (en) | 2020-07-31 | 2020-07-31 | Ozone treatment process for advanced sewage treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417528A (en) * | 2022-09-16 | 2022-12-02 | 安徽亿臻环境工程有限公司 | Combined advanced oxidation sewage treatment method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445288A (en) * | 2017-09-26 | 2017-12-08 | 江苏阿拉丁环保科技有限公司 | A kind of sewage ozone-oxidizing device |
| CN108996836A (en) * | 2018-08-20 | 2018-12-14 | 朱翠帮 | A kind of industrial sewage treatment technology |
| CN111362462A (en) * | 2020-03-26 | 2020-07-03 | 四川恒泰环境技术有限责任公司 | Advanced treatment method for papermaking wastewater |
-
2020
- 2020-07-31 CN CN202010762545.1A patent/CN111925008A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445288A (en) * | 2017-09-26 | 2017-12-08 | 江苏阿拉丁环保科技有限公司 | A kind of sewage ozone-oxidizing device |
| CN108996836A (en) * | 2018-08-20 | 2018-12-14 | 朱翠帮 | A kind of industrial sewage treatment technology |
| CN111362462A (en) * | 2020-03-26 | 2020-07-03 | 四川恒泰环境技术有限责任公司 | Advanced treatment method for papermaking wastewater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417528A (en) * | 2022-09-16 | 2022-12-02 | 安徽亿臻环境工程有限公司 | Combined advanced oxidation sewage treatment method |
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Application publication date: 20201113 |