CN111517458A - Centralized treatment device and treatment method for waste gas of sewage treatment plant - Google Patents
Centralized treatment device and treatment method for waste gas of sewage treatment plant Download PDFInfo
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- CN111517458A CN111517458A CN202010381428.0A CN202010381428A CN111517458A CN 111517458 A CN111517458 A CN 111517458A CN 202010381428 A CN202010381428 A CN 202010381428A CN 111517458 A CN111517458 A CN 111517458A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/109—Characterized by the shape
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
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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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a device and a method for centralized treatment of waste gas of a sewage treatment plant.
Description
Technical Field
The invention relates to the field of biological deodorization equipment, in particular to a centralized treatment device and a treatment method for waste gas of a sewage treatment plant.
Background
The sewage treatment plant can generate a large amount of irritant odor and toxic and harmful gas in the process of treating domestic sewage and industrial sewage, the gas has the characteristics of large gas amount, complex components, corrosiveness, foul odor and the like, and the components of the gas mainly comprise ammonia gas, hydrogen sulfide, Volatile Organic Compounds (VOCs) and the like. Odor generated in anaerobic zones, grating rooms, sludge dewatering rooms and the like of sewage treatment plants can greatly affect the surrounding environment and residents of the sewage treatment plants if the odor is discharged without treatment, so that the odor is treated and then discharged.
The existing method has the following defects: the methods such as a dilution diffusion method, an aromatic masking method and the like only reduce the odor of the gas but do not really treat pollutants in the gas, and toxic and harmful substances still exist in the gas; the chemical oxidation method is to oxidize pollutants by a strong oxidant so as to achieve the purpose of treatment, and has the main problems of high cost and secondary pollution; the biological method is to degrade pollutants in the exhaust gas through the metabolism of microorganisms, and needs to establish a separate biological treatment facility near a sewage treatment structure, and the single biological treatment is greatly influenced by temperature and has poor impact resistance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for the centralized treatment of waste gas of a sewage treatment plant, which are used for concentrating the waste gas generated by the sewage treatment plant and then discharging the concentrated waste gas into a closed aeration tank to perform spray deodorization through activated sludge, and performing the centralized treatment of the waste gas while treating the sewage, thereby greatly reducing the waste gas treatment cost and having good treatment effect on the waste gas with large air volume and low concentration.
The technical scheme of the invention is as follows:
the utility model provides a sewage treatment plant waste gas centralized treatment device, including the aeration tank, aeration tank top be the enclosed construction, the top of aeration tank is connected with exhaust passage, the bottom of aeration tank is provided with inlet channel, exhaust passage in be provided with the activated sludge shower towards sewage in the aeration tank, be provided with aeration equipment, activated sludge and sewage pump in the sewage in the aeration tank, the sewage pump promote the sewage that contains activated sludge to the activated sludge shower to spray down through the infusion pipeline, the infusion pipeline on be connected with the bypass inlet tube, the junction of bypass inlet tube and infusion pipeline be provided with the bypass valve, the import department that infusion pipeline and sewage pump are connected be provided with the sewage concentration meter, bypass valve, sewage pump all be connected with the controller.
And a suspended biological filler is arranged in the aeration tank.
The bottom of the aeration tank is provided with two air inlet channels, one air inlet pipeline is communicated into the aeration device in the aeration tank, and the other air inlet pipeline is communicated above sewage in the aeration tank.
The exhaust passage is provided with a porous biological filler area at the position connected with the top end of the aeration tank, and the activated sludge spray pipe is positioned right above the porous biological filler area.
A method for centralized treatment of waste gas of a sewage treatment plant specifically comprises the following steps: firstly, waste gas enters an aeration tank through an air inlet channel and then is discharged through an exhaust channel, meanwhile, a sewage pump lifts sewage containing activated sludge to an activated sludge spray pipe through a liquid conveying pipeline to be sprayed, the sewage containing activated sludge is contacted with the waste gas entering the exhaust channel, microorganisms of the activated sludge adsorb pollutants in the waste gas, and then the sewage containing activated sludge falls into the aeration tank again; in order to ensure the spraying effect of the activated sludge, the spraying structure is prevented from being blocked, when the concentration of the sewage containing the activated sludge is greater than a set value, the bypass valve is opened, and the water in the bypass pipeline enters the liquid conveying pipeline to dilute the sewage and then sprays, so that the normal spraying of the activated sludge is ensured.
The sewage containing the activated sludge is sprayed by the activated sludge spraying pipe, firstly falls into a porous biological filler area in the exhaust channel, and forms a microbial adsorption film on the surface of the porous biological filler area, the waste gas entering the exhaust channel is firstly contacted with the microbial adsorption film in the porous biological filler area, so that pollutants in the waste gas are preliminarily adsorbed by the microbial adsorption film, then the waste gas is contacted with the sprayed activated sludge after passing through the porous biological filler area, and is simultaneously subjected to spraying prewashing and further adsorption treatment of the pollutants, and finally is discharged by the exhaust channel.
One part of the waste gas enters the upper part of the sewage in the aeration tank through the air inlet channel, directly enters the exhaust channel and is subjected to activated sludge spraying treatment, the other part of the waste gas enters the aeration device in the aeration tank through the air inlet channel, auxiliary aeration is carried out, the waste gas is contacted with the suspended biological filler in the aeration tank, and pollutants in the waste gas are adsorbed by microorganisms on the surface of the suspended biological filler.
The dissolved oxygen concentration of the sewage containing the activated sludge in the aeration tank is not less than 2mg O2The volume ratio of the sewage containing the activated sludge to the water is 1000: 1-10: 1, the sludge taking point of the sewage pump is positioned at 1/2 tank lengths of the aeration tank to the water outlet end, or is positioned at 2/3 time points of the duration of an aeration period to the end of the period.
The time of the waste gas in the exhaust passage is 1-10 s.
The pollutant load in the waste gas is controlled within 20 percent of the maximum treatment load of the aeration tank.
The invention has the advantages that:
(1) the invention provides a simple and easy-to-operate low-cost aeration tank waste gas treatment method, and under the condition that the current environmental protection related laws and regulations put higher requirements on waste gas emission of sewage treatment plants, most aeration tanks adopt a mode of covering the tops of the aeration tanks to uniformly collect gas and then treat the gas through a gas treatment structure.
(2) The invention does not need to additionally build a waste gas treatment structure, only needs to add an exhaust channel and an activated sludge spray pipe at the top of the closed aeration tank, and has the advantages of low manufacturing cost, simple operation and maintenance and good treatment effect on gases with large air quantity and low concentration.
(3) The method provided by the invention can be used as a method for treating waste gas generated in anaerobic zones, grid rooms and sludge dewatering rooms of sewage treatment plants, and can also be used for treating waste gas generated in other structures by introducing the waste gas into an aeration tank through a pipeline.
(4) Compared with a simple activated sludge adsorption method, the method provided by the invention has the advantages that the waste gas treatment effect is further improved by fully utilizing the characteristics of higher sulfur and ammonia oxidizing bacteria of the activated sludge with sufficient aerobic reaction, and the two functions of physical adsorption and biotransformation can be greatly improved, so that the optimal treatment effect is achieved.
(5) The invention can be used as a complete waste gas treatment system and can also be used as a pretreatment system for other waste gas treatment, thereby greatly reducing the concentration of pollutants in the waste gas and reducing the operation load of the subsequent treatment process.
(6) The sprayed activated sludge is taken from the aeration tank, the activated sludge circulates in the tank, the activated sludge absorbing pollutants returns to the aeration tank for biological metabolism, the load of the pollutants in the gas is lower than that of the pollutants washed by water treatment, the influence on the operation of the aeration tank is avoided, and the metabolites are non-toxic and odorless inorganic substances and cannot generate secondary pollution.
Drawings
FIG. 1 is a schematic structural diagram of a centralized treatment device for waste gas from a sewage treatment plant according to the present invention.
FIG. 2 is a schematic structural diagram of a simulation experiment apparatus according to the present invention.
FIG. 3 is a bar graph of hydrogen sulfide gas concentrations before and after treatment of the activated sludge group and the clean water group of experiment 1.
FIG. 4 is a line graph of phenol gas concentration with time before and after the treatment of the activated sludge group of experiment 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A sewage treatment plant waste gas centralized treatment device comprises an aeration tank 1, the top end of the aeration tank is of a closed structure, the top end of the aeration tank 1 is connected with an exhaust channel 2, the bottom of the aeration tank 1 is provided with two paths of air inlet channels, one path of air inlet pipeline 3 is introduced into an aeration device in the aeration tank, one path of air inlet pipeline 4 is introduced above sewage in the aeration tank, an activated sludge spray pipe 5 facing the sewage in the aeration tank 1 is arranged in the exhaust channel 2, a porous biological filler area 6 is arranged at the position where the exhaust channel 2 is connected with the top end of the aeration tank 1, the activated sludge spray pipe 5 is positioned right above the porous biological filler area 6, an aeration device 7, activated sludge, suspended biological fillers 8 and a sewage pump 9 are arranged in the sewage in the aeration tank 1, the sewage containing the activated sludge is lifted to the activated sludge spray pipe 5 through a transfusion pipeline 10 to be sprayed, the infusion pipeline 10 is connected with a bypass water inlet pipe 11, a bypass valve 12 is arranged at the joint of the bypass water inlet pipe 11 and the infusion pipeline 10, a sewage concentration meter is arranged at the inlet of the infusion pipeline 10 connected with the sewage pump 9, and the sewage concentration meter, the bypass valve 12 and the sewage pump 9 are all connected with the controller.
A sewage treatment plant waste gas centralized processing method, at first a part of waste gas enters the aeration tank through the inlet channel 4 and then discharges through the exhaust channel 2, meanwhile the sewage pump 9 promotes the sewage containing activated sludge to the activated sludge shower pipe 5 to spray through the infusion pipeline 10, the sewage containing activated sludge falls into the porous biological filler area 6 in the exhaust channel at first, and form the microbial adsorption membrane on the surface of the porous biological filler area 6, the waste gas entering the exhaust channel contacts with microbial adsorption membrane of the porous biological filler area 6 at first, make the pollutant in the waste gas carry on the preliminary adsorption by the microbial adsorption membrane, then the waste gas contacts with active sludge sprayed after passing the porous biological filler area 6 again, carry on spray prewashing and further adsorption treatment of the pollutant at the same time, discharge from the exhaust channel 2 finally; the other part of the waste gas enters an aeration device in the aeration tank through the air inlet channel 3, the waste gas is subjected to auxiliary aeration and is contacted with the suspended biological filler 8 in the aeration tank, and pollutants in the waste gas are adsorbed by microorganisms on the surface of the suspended biological filler 8; in order to ensure the spraying effect of the activated sludge and prevent the spraying structure from being blocked, when the concentration of the sewage containing the activated sludge is greater than a set value, the bypass valve 12 is opened, and the water in the bypass pipeline 11 enters the infusion pipeline 10 to dilute the sewage and then spray, so that the normal spraying of the activated sludge is ensured.
Wherein the dissolved oxygen concentration of the sewage containing the activated sludge in the aeration tank 1 is not less than 2mg O2L; the volume ratio of sewage containing activated sludge to water is 1000: 1-10: 1; the sludge taking point of the sewage pump 9 is positioned from the tank length 1/2 to the water outlet end of the aeration tank, or positioned from the 2/3 time point to the end of the duration of one aeration period; the time of the exhaust gas in the exhaust passage 2 is 1-10 s; the pollutant load in the waste gas is controlled within 20 percent of the maximum treatment load of the aeration tank.
To examine the effect of the present invention in treating exhaust gas, the following experiment was performed:
experiment 1: the experiment is a verification experiment, the waste gas treatment effect is considered by taking hydrogen sulfide as a pollutant, the hydrogen sulfide gas is supplied by adopting the gas generator 13, the reactor of the waste gas centralized treatment device for the sewage treatment plant is simulated to comprise a shell 14, an activated sludge liquid storage layer or a clear water layer 15 arranged at the bottom end of the shell 14 and a spray pipe 16, the additionally treated waste gas is recovered by adopting a tail gas absorption device 17, the adopted activated sludge MLVSS is 3.5g/L, the concentration of the hydrogen sulfide is 27-32ppm, and the specific steps are as follows:
(1) detecting the concentration of the hydrogen sulfide gas output by the gas generator;
(2) and respectively introducing the hydrogen sulfide gas output by the gas generator into the reactor provided with the activated sludge liquid storage layer or the clear water layer, and then detecting the concentration of the hydrogen sulfide gas in the outlet gas of the two experimental devices.
As shown in figure 3, the activated sludge has good adsorbability to hydrogen sulfide, when the inlet gas concentration is 27-32ppm, the outlet gas concentration is 4-8ppm, the removal rate reaches over 75 percent, and the removal rate of clear water is lower than 16 percent. Therefore, the experiment fully verifies the feasibility and the effectiveness of the patent.
Experiment 2: the experiment is a verification experiment, the waste gas treatment effect is investigated by taking phenol gas as a pollutant, the phenol gas is supplied by adopting a gas generator, and the simulation reactor of the waste gas centralized treatment device of the sewage treatment plant comprises a shellAn activated sludge liquid storage layer or a clear water layer arranged at the bottom end of the shell and a spray pipe, wherein the waste gas after the treatment is recovered by a tail gas absorption device, the MLVSS of the activated sludge is 3.5g/L, and the concentration of phenol gas is 0.1-0.12g/m3The gas flow is 2L/min, and the specific steps are as follows:
(1) detecting the concentration of the phenol gas output by the gas generator;
(2) and respectively introducing the phenol gas output by the gas generator into the reactor provided with the activated sludge liquid storage layer or the clear water layer, and then detecting the concentration of the phenol gas in the gas outlet of the two experimental devices.
As can be seen from fig. 4, spraying activated sludge has a good effect of removing phenol, so the test fully verifies the feasibility and effectiveness of the patent.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a sewage treatment plant waste gas centralized processing device which characterized in that: including the aeration tank, the aeration tank top be enclosed construction, the top of aeration tank is connected with exhaust passage, the bottom of aeration tank is provided with inlet channel, exhaust passage in be provided with the activated sludge shower towards sewage in the aeration tank, be provided with aeration equipment, activated sludge and sewage pump in the sewage in the aeration tank, the sewage pump promote the sewage that contains activated sludge to the activated sludge shower through the infusion pipeline and spray and get off, the infusion pipeline on be connected with the bypass inlet tube, the junction of bypass inlet tube and infusion pipeline be provided with the bypass valve, the import department that infusion pipeline and sewage pump are connected be provided with the sewage concentration meter, bypass valve, sewage pump all be connected with the controller.
2. The centralized treatment device for the waste gas of the sewage treatment plant according to claim 1, characterized in that: and a suspended biological filler is arranged in the aeration tank.
3. The centralized treatment device for the waste gas of the sewage treatment plant according to claim 2, characterized in that: the bottom of the aeration tank is provided with two air inlet channels, one air inlet pipeline is communicated into the aeration device in the aeration tank, and the other air inlet pipeline is communicated above sewage in the aeration tank.
4. The centralized treatment device for the waste gas of the sewage treatment plant according to claim 1, characterized in that: the exhaust passage is provided with a porous biological filler area at the position connected with the top end of the aeration tank, and the activated sludge spray pipe is positioned right above the porous biological filler area.
5. The method for treating the centralized treatment device of the waste gas of the sewage treatment plant according to claim 1, which is characterized in that: the method specifically comprises the following steps: firstly, waste gas enters an aeration tank through an air inlet channel and then is discharged through an exhaust channel, meanwhile, a sewage pump lifts sewage containing activated sludge to an activated sludge spray pipe through a liquid conveying pipeline to be sprayed, the sewage containing activated sludge is contacted with the waste gas entering the exhaust channel, microorganisms of the activated sludge adsorb pollutants in the waste gas, and then the sewage containing activated sludge falls into the aeration tank again; in order to ensure the spraying effect of the activated sludge, the spraying structure is prevented from being blocked, when the concentration of the sewage containing the activated sludge is greater than a set value, the bypass valve is opened, and the water in the bypass pipeline enters the liquid conveying pipeline to dilute the sewage and then sprays, so that the normal spraying of the activated sludge is ensured.
6. The processing method according to claim 5, characterized in that: the sewage containing the activated sludge is sprayed by the activated sludge spraying pipe, firstly falls into a porous biological filler area in the exhaust channel, and forms a microbial adsorption film on the surface of the porous biological filler area, the waste gas entering the exhaust channel is firstly contacted with the microbial adsorption film in the porous biological filler area, so that pollutants in the waste gas are preliminarily adsorbed by the microbial adsorption film, then the waste gas is contacted with the sprayed activated sludge after passing through the porous biological filler area, and is simultaneously subjected to spraying prewashing and further adsorption treatment of the pollutants, and finally is discharged by the exhaust channel.
7. The processing method according to claim 5, characterized in that: one part of the waste gas enters the upper part of the sewage in the aeration tank through the air inlet channel, directly enters the exhaust channel and is subjected to activated sludge spraying treatment, the other part of the waste gas enters the aeration device in the aeration tank through the air inlet channel, auxiliary aeration is carried out, the waste gas is contacted with the suspended biological filler in the aeration tank, and pollutants in the waste gas are adsorbed by microorganisms on the surface of the suspended biological filler.
8. The processing method according to claim 5, characterized in that: the dissolved oxygen concentration of the sewage containing the activated sludge in the aeration tank is not less than 2mg O2The volume ratio of the sewage containing the activated sludge to the water is 1000: 1-10: 1, the sludge taking point of the sewage pump is positioned at 1/2 tank lengths of the aeration tank to the water outlet end, or is positioned at 2/3 time points of the duration of an aeration period to the end of the period.
9. The processing method according to claim 5, characterized in that: the time of the waste gas in the exhaust passage is 1-10 s.
10. The processing method according to claim 5, characterized in that: the pollutant load in the waste gas is controlled within 20 percent of the maximum treatment load of the aeration tank.
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| CN201911402413 | 2019-12-30 | ||
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915774A (en) * | 2021-04-06 | 2021-06-08 | 广东省南方环保生物科技有限公司 | Sludge odor and sewage odor co-processing method and device |
| CN114602947A (en) * | 2022-03-18 | 2022-06-10 | 南阳迎盈环保科技有限公司 | Deodorization method for innocent treatment of dead pigs |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433802A (en) * | 2007-11-12 | 2009-05-20 | 中国科学院生态环境研究中心 | Integral baffle bioreactor waste gas treatment equipment and waste gas treatment method |
| CN106552503A (en) * | 2015-09-24 | 2017-04-05 | 魏晓明 | Integral biological oxidative deamination device of air and method |
-
2020
- 2020-05-08 CN CN202010381428.0A patent/CN111517458A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433802A (en) * | 2007-11-12 | 2009-05-20 | 中国科学院生态环境研究中心 | Integral baffle bioreactor waste gas treatment equipment and waste gas treatment method |
| CN106552503A (en) * | 2015-09-24 | 2017-04-05 | 魏晓明 | Integral biological oxidative deamination device of air and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915774A (en) * | 2021-04-06 | 2021-06-08 | 广东省南方环保生物科技有限公司 | Sludge odor and sewage odor co-processing method and device |
| CN112915774B (en) * | 2021-04-06 | 2022-11-29 | 广东省南方环保生物科技有限公司 | Sludge odor and sewage odor co-processing method and device |
| CN114602947A (en) * | 2022-03-18 | 2022-06-10 | 南阳迎盈环保科技有限公司 | Deodorization method for innocent treatment of dead pigs |
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Application publication date: 20200811 |