CN117142653B - Sulfur-containing wastewater treatment device and sulfur-containing wastewater treatment method - Google Patents
Sulfur-containing wastewater treatment device and sulfur-containing wastewater treatment method Download PDFInfo
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- CN117142653B CN117142653B CN202311422813.5A CN202311422813A CN117142653B CN 117142653 B CN117142653 B CN 117142653B CN 202311422813 A CN202311422813 A CN 202311422813A CN 117142653 B CN117142653 B CN 117142653B
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- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 70
- 239000011593 sulfur Substances 0.000 title claims abstract description 70
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000004065 wastewater treatment Methods 0.000 title claims description 16
- 230000029087 digestion Effects 0.000 claims abstract description 160
- 239000002351 wastewater Substances 0.000 claims abstract description 48
- 238000004062 sedimentation Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 29
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 157
- 238000005273 aeration Methods 0.000 claims description 94
- UEKDBDAWIKHROY-UHFFFAOYSA-L bis(4-bromo-2,6-ditert-butylphenoxy)-methylalumane Chemical compound [Al+2]C.CC(C)(C)C1=CC(Br)=CC(C(C)(C)C)=C1[O-].CC(C)(C)C1=CC(Br)=CC(C(C)(C)C)=C1[O-] UEKDBDAWIKHROY-UHFFFAOYSA-L 0.000 claims description 94
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 64
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 39
- 229910052799 carbon Inorganic materials 0.000 claims description 39
- 229910052757 nitrogen Inorganic materials 0.000 claims description 32
- 239000010802 sludge Substances 0.000 claims description 29
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 27
- 241000894006 Bacteria Species 0.000 claims description 21
- 238000004146 energy storage Methods 0.000 claims description 15
- -1 sulfur ions Chemical class 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 9
- 125000000101 thioether group Chemical group 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 230000001546 nitrifying effect Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000005276 aerator Methods 0.000 claims 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 abstract description 6
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910021529 ammonia Inorganic materials 0.000 abstract description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000005842 biochemical reaction Methods 0.000 abstract 2
- 238000001556 precipitation Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000009388 chemical precipitation Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 241001453382 Nitrosomonadales Species 0.000 description 1
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical class [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
-
- 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
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Removal Of Specific Substances (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a treatment device and a treatment method of sulfur-containing wastewater, comprising the following steps: the device comprises a primary digestion tank, a secondary digestion tank, a deep digestion tank and an upflow sedimentation tank; wherein: the ratio of the sulfide content to the nitrate nitrogen content of the wastewater to be treated can be adjusted to a state which is most suitable for synchronous nitrification-short-range sulfur autotrophic denitrification-anaerobic ammonia oxidation reaction or synchronous nitrification-sulfur autotrophic denitrification reaction in a secondary digestion tank, the biochemical reaction is completed in a primary digestion tank, and the deep digestion tank can continuously remove residual pollutants and adsorb elemental sulfur particles generated in the biochemical reaction process. The treatment device and the treatment method provided by the invention can simultaneously realize the full removal of sulfide, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen, and are highly integrated, small in occupied area and low in operation energy consumption.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a device and a method for treating sulfur-containing wastewater.
Background
The wastewater treatment is to treat the wastewater by physical, chemical, biological and other methods, so that the wastewater is purified, pollution is reduced, the wastewater is recovered and reused, and water resources are fully utilized. According to the source of wastewater, the wastewater can be classified into living wastewater and industrial wastewater, wherein the industrial wastewater comprises electroplating wastewater, heavy metal wastewater and the like, and different treatment modes are needed due to different wastewater components of different sources.
For the industries of oil refining, petrifaction, pharmacy, fuel, leather making and the like, a large amount of wastewater containing sulfur ions, namely sulfur-containing wastewater, is generated in the production process, and the sulfur-containing wastewater is common in industrial production, and has the characteristics of high toxicity and strong corrosiveness. The sulfur element in the wastewater exists in various forms, and the hazard is relatively large hydrogen sulfide. The wastewater with high sulfur content of sulfide can corrode metal pipelines and equipment, so that great economic loss is brought to production; and when microorganisms exist in the sulfur-containing wastewater storage environment, sulfate reducing bacteria are generated, and the microorganisms can reduce sulfate into sulfide or hydrogen sulfide, so that the acidity of the wastewater and the harm to the environment are increased.
At present, common sulfur-containing wastewater treatment methods comprise a chemical precipitation method, an electrochemical oxidation method, a biochemical method and the like, wherein the chemical precipitation method mainly adopts reagents such as quicklime, ferrous sulfate and the like to react with sulfur ions to form precipitation, and finally the precipitation is separated from the wastewater; the electrochemical oxidation method is to oxidize sulfides in sulfur-containing wastewater by using oxygen, hydrogen peroxide and the like in the air to generate sulfate, wherein the sulfate is in a dissolved state and needs to be removed by combining other modes; the biochemical method is a method for oxidizing sulfur ions into sulfur simple substances by sulfur autotrophic denitrifying bacteria in an anaerobic environment and removing the sulfur simple substances by precipitation. The sewage contains not only sulfur but also a large amount of ammonia nitrogen compounds, but no related technology can simply and conveniently realize denitrification and sulfur removal at present.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device and a method for treating sulfur-containing wastewater.
In a first aspect, the present invention provides a treatment apparatus for sulfur-containing wastewater, the treatment apparatus comprising: primary digestion tank, secondary digestion tank, degree of depth digestion tank and upflow sedimentation tank, wherein:
the deep digestion tank and the upflow sedimentation tank are positioned in the primary digestion tank, the upflow sedimentation tank is positioned above the deep digestion tank and is communicated with the deep digestion tank through a three-phase separator, the primary digestion tank is communicated with the deep digestion tank, and the upflow sedimentation tank is provided with an overflow port communicated with the outside of the primary digestion tank;
the top surface of the upflow sedimentation tank is sealed, the diameter of the top surface is larger than that of the bottom surface, aerobic granular sludge is filled in the deep digestion tank, the bottom of the deep digestion tank is communicated with a sludge discharge pipe, and a submersible sewage pump and a sludge discharge valve are arranged on the sludge discharge pipe;
the secondary digestion tank is arranged at the upstream of the primary digestion tank and is communicated with the primary digestion tank through a three-stage water inlet channel;
the primary digestion tank is internally provided with a primary MABR, the primary MABR is arranged in a cavity formed by the inner wall of the primary digestion tank, the outer wall of the deep digestion tank and the outer wall of the upflow sedimentation tank, and the secondary digestion tank is internally provided with a secondary MABR.
In the invention, the sulfur-containing wastewater to be treated can enter a secondary digestion tank and is regulated in the secondary digestion tank, so that the ratio of sulfide to nitrate nitrogen content contained in the wastewater is regulated to a state which is most suitable for synchronous nitrification-short-cut sulfur autotrophic denitrification-anaerobic ammonia oxidation reaction or synchronous nitrification-sulfur autotrophic denitrification reaction, then synchronous nitrification-short-cut sulfur autotrophic denitrification-anaerobic ammonia oxidation reaction or synchronous nitrification-sulfur autotrophic denitrification reaction is carried out in a primary digestion tank, and then the reaction liquid flows into a deep digestion tank, so that residual pollutants can be continuously removed in the deep digestion tank and elemental sulfur particles generated in the primary digestion tank can be adsorbed.
Therefore, the sulfur-containing wastewater treatment device provided by the invention can simultaneously realize the full removal of sulfide, ammonia nitrogen and nitrite nitrogen, not only can realize the removal of partial sulfate on the premise of not generating any byproducts, but also can normally operate on the premise of lower COD value, and has the advantages of small occupied area and low energy consumption and medicine consumption.
As a preferable technical scheme of the invention, the treatment device further comprises an organic carbon source dosing tank, wherein the organic carbon source dosing tank is communicated with the secondary digestion tank through an organic carbon source dosing pipe, and the organic carbon source dosing pipe is provided with an organic carbon source dosing pump and an organic carbon source dosing valve.
As a preferable technical scheme of the invention, the deep digestion tank and the outer wall of the upflow sedimentation tank are provided with energy storage pipes, the water inlet of each energy storage pipe is arranged in a cavity formed by the outer side wall of the upflow sedimentation tank and the inner side wall of the primary digestion tank, the horizontal height of the water inlet is higher than that of an overflow port of the upflow sedimentation tank, and the water outlet of each energy storage pipe is communicated with the bottom of the deep digestion tank.
As a preferable technical scheme of the invention, the primary MABR comprises a top plate and a bottom plate, wherein the bottom plate of the primary MABR is fixed at the bottom of the primary digestion tank, the top plate of the primary MABR is fixed at the top of the primary digestion tank and/or the outer side wall of the deep digestion tank, the inner layer of the primary MABR is inoculated with nitrifying bacteria, and the outer layer of the primary MABR is inoculated with sulfur autotrophic denitrifying bacteria and anammox bacteria.
The secondary MABR comprises a top plate and a bottom plate, the bottom plate of the secondary MABR is fixed at the bottom of the secondary digestion tank, the top plate of the secondary MABR is fixed at the top of the secondary digestion tank, the inner layer of the secondary MABR is inoculated with nitrifying bacteria, and the outer layer of the secondary MABR is inoculated with sulfate reducing bacteria and denitrifying bacteria.
The sulfur-containing wastewater treatment device provided by the invention skillfully utilizes sulfate reducing bacteria, so that the purpose of removing part of sulfate can be achieved, and meanwhile, reaction substrates can be supplemented for sulfur autotrophic denitrifying bacteria.
As a preferable technical scheme of the invention, the treatment device further comprises a primary MABR aeration device, a primary inner cavity aeration device, a secondary MABR aeration device and a secondary inner cavity aeration device.
The primary MABR aeration device is connected with the bottom plate of the primary MABR, and the gas distribution pipeline of the primary inner cavity aeration device is arranged at the bottom of the deep digestion tank.
The secondary MABR aeration device is connected with the bottom plate of the secondary MABR, and the gas distribution pipeline of the secondary inner cavity aeration device is arranged at the bottom of the secondary digestion tank.
As a preferable technical scheme of the invention, the treatment device further comprises a primary water inlet channel connected with the primary digestion tank, and a water outlet of the primary water inlet channel is positioned at the bottom of the primary digestion tank.
The treatment device further comprises a secondary water inlet channel and a tertiary water inlet channel which are connected with the secondary digestion tank, wherein a water inlet of the secondary water inlet channel is communicated with the primary water inlet channel, a water outlet is positioned at the bottom of the secondary digestion tank, a water inlet of the tertiary water inlet channel is positioned at the top of the secondary digestion tank, a water outlet is communicated with the primary water inlet channel, and a communication port of the secondary water inlet channel and the primary water inlet channel is positioned at the upstream of a communication port of the tertiary water inlet channel and the primary water inlet channel.
The primary water inlet channel is provided with a primary control valve, the primary control valve is positioned between the water inlet of the secondary water inlet channel and the water outlet of the tertiary water inlet channel, the secondary water inlet channel is provided with a secondary control valve, the secondary control valve is adjacent to the water inlet of the secondary water inlet channel, the tertiary water inlet channel is provided with a tertiary control valve, and the tertiary control valve is adjacent to the water outlet of the tertiary water inlet channel.
In the invention, the control valve is used for controlling whether water is needed to be drained through a switch.
The treatment device further comprises a four-stage water inlet channel connected with the secondary digestion tank and the three-stage water inlet channel, a communication port of the four-stage water inlet channel and the three-stage water inlet channel is positioned between a water inlet of the three-stage water inlet channel and the three-stage control valve, a four-stage control valve is arranged on the four-stage water inlet channel, and the four-stage control valve is adjacent to a water outlet of the four-stage water inlet channel.
As a preferable technical scheme of the invention, a primary total nitrogen detector, a primary COD detector, a primary sulfide detector and a primary sulfate detector are arranged on the primary water inlet channel, and the primary total nitrogen detector, the primary COD detector, the primary sulfide detector and the primary sulfate detector are positioned between the water inlet of the primary water inlet channel and the water inlet of the secondary water inlet channel.
In the present invention, the primary total nitrogen meter, primary COD meter, primary sulfide meter and primary sulfate meter are used to monitor the total nitrogen concentration (mg/L), COD value (mg/L), sulfur ion concentration (mg/L) and sulfate ion concentration (mg/L) of the initial feed water.
The three-stage water inlet channel is provided with a secondary total nitrogen detector and a secondary sulfide detector, and the secondary total nitrogen detector and the secondary sulfide detector are positioned at the water inlet of the three-stage water inlet channel.
In the invention, the secondary total nitrogen detector and the secondary sulfide detector are used for detecting the total nitrogen concentration (mg/L) and the sulfur ion concentration (mg/L) at the water outlet of the secondary digestion tank.
In a second aspect, the present invention provides a method for treating sulfur-containing wastewater, the method being performed by using the apparatus for treating sulfur-containing wastewater according to the first aspect, the apparatus being controlled by a PLC system, the PLC system operating according to the following formula:
wherein:
s1 is the concentration of sulfur ions in the sulfur-containing wastewater of the initial inflow water, mg/L;
n1 is the total nitrogen concentration of the sulfur-containing wastewater of the initial inflow water, mg/L;
c is the COD value of the sulfur-containing wastewater of the initial inflow water, mg/L;
s2 is the concentration of sulfur ions at the water outlet of the secondary digestion tank, and mg/L;
n2 is the total nitrogen concentration at the water outlet of the secondary digestion tank, and mg/L.
As a preferable technical scheme of the invention, when the PLC system gives an instruction of running a primary program, the primary control valve is opened, the secondary control valve and the tertiary control valve are closed, and the secondary MABR aeration device and the secondary inner cavity aeration device are closed;
when the PLC system gives an instruction for running a secondary program, the primary control valve and the quaternary control valve are closed, the secondary control valve and the tertiary control valve are opened, and the secondary MABR aeration device and the secondary inner cavity aeration device are opened;
when the PLC system gives an instruction for running a three-level program, the primary control valve and the four-level control valve are closed, the secondary control valve and the three-level control valve are opened, the secondary MABR aeration device is opened, and the secondary inner cavity aeration device is closed;
when the PLC system gives an instruction for running a four-stage program, the primary control valve and the three-stage control valve are closed, the secondary control valve and the four-stage control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the aeration rate of the secondary inner cavity aeration device is reduced with a preset slope;
when the PLC system gives an instruction for running a five-stage program, the primary control valve and the three-stage control valve are closed, the secondary control valve and the four-stage control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the aeration rate of the secondary inner cavity aeration device is increased by a preset slope;
when the PLC system gives an instruction of running a six-level program, the primary control valve and the four-level control valve are closed, the secondary control valve and the three-level control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the organic carbon source dosing box is used for dosing the organic carbon source with a preset dosing amount;
when the PLC system gives an instruction for running a seven-level program, the primary control valve and the tertiary control valve are closed, the secondary control valve and the quaternary control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, the aeration rate of the secondary inner cavity aeration device is increased by a preset slope, and the organic carbon source dosing box doses the organic carbon source by a preset dosing amount;
in the treatment method, a primary MABR aeration device and a primary inner cavity aeration device continuously operate, wastewater to be treated directly enters the primary digestion tank or enters the primary digestion tank after being treated by the secondary digestion tank, and then flows through the primary digestion tank, an energy storage pipe, the deep digestion tank, the three-phase separator and the upflow sedimentation tank in sequence under the action of gravity self-flow.
As a preferable technical scheme of the invention, the COD equivalent of the preset dosage of the organic carbon source dosing tank is not lower than (4 XN 1-C) mg/L and not higher than (4 XN 1-C+2 XSP), and SP is the sulfate ion concentration of the initial inflow water and mg/L.
According to the optimal technical scheme, after the aerobic granular sludge contained in the deep digestion tank is intercepted by the three-phase separator, the aerobic granular sludge is settled in a preset period, and is discharged out of the deep digestion tank through the sludge discharge pipe, wherein the preset period is 40-50 days, and elemental sulfur particles attached to the surface of the aerobic granular sludge are separated and recovered.
In the processing method provided by the invention, the processing method is controlled by a PLC system and comprises the following steps:
s1, recording an influent sulfur ion concentration S1 (mg/L) by a primary sulfide detector at a fixed frequency, recording an influent total nitrogen concentration N1 (mg/L) by a primary total nitrogen detector at a fixed frequency, recording an influent COD value C (mg/L) by a primary COD detector at a fixed frequency, recording an influent sulfate ion concentration SP (mg/L) by a primary sulfate detector at a fixed frequency, recording a sulfur ion concentration S2 (mg/L) in a secondary digestion tank by a secondary sulfide detector at a fixed frequency, recording a total nitrogen concentration N2 (mg/L) in a secondary digestion tank by a secondary total nitrogen detector at a fixed frequency, and sending a feedback signal to a PLC system;
s2, after the PLC system receives the signals, a primary program, a secondary program, a tertiary program, a quaternary program, a penta-level program, a hexa-level program and a hepta-level program are respectively operated according to the following formulas:
s3, continuously operating the primary MABR aeration device and the primary inner cavity aeration device, enabling water to be treated to directly enter a primary digestion tank or enter the primary digestion tank after being treated by a secondary digestion tank, and then sequentially flowing through the primary digestion tank, the energy storage pipe, the deep digestion tank, the three-phase separator and the upflow sedimentation tank under the action of gravity self-flowing.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
(1) The treatment device provided by the invention not only can remove total nitrogen contained in sewage, but also can treat sulfur-containing wastewater, can fully remove sulfide in the sulfur-containing wastewater, and realizes comprehensive removal of sulfide, total nitrogen (ammonia nitrogen, nitrite nitrogen and nitrate nitrogen).
(2) The treatment device for the sulfur-containing wastewater provided by the invention not only can remove part of sulfate in the sulfur-containing sewage and wastewater, but also can convert the part of sulfate into sulfide byproducts for application.
(3) The treatment device for the sulfur-containing wastewater provided by the invention can normally operate under the condition that the COD content of the wastewater to be treated is low, does not need to supplement an organic carbon source or only accurately supplement a small amount of organic carbon source under specific conditions, does not need to carry activated sludge to reflux, can realize continuous water outlet, avoids the waste of the activated sludge, and remarkably saves energy consumption and medicine consumption;
(4) The processing device provided by the invention is highly integrated, and the occupied area can be remarkably saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic structural view of a sulfur-containing wastewater treatment device according to an embodiment of the present invention;
FIG. 2 is a program control diagram of the sulfur-containing wastewater treatment device for treating sulfur-containing wastewater according to the embodiment of the invention.
Wherein:
1-a primary digestion tank; 101-primary MABR; 102-a primary MABR aeration device; 103-primary water inlet channel; 1031-a primary control valve; 104-primary total nitrogen monitor; 105-primary COD detector; 106-primary sulfide detector; 107-primary sulfate meter;
2-a secondary digestion tank; 201-secondary MABR; 202-a secondary MABR aeration device; 203-a secondary lumen aeration device; 204-a secondary water inlet channel; 2041-a secondary control valve; 205-three-stage water inlet channels; 2051-three-stage control valve; 206-four-stage water inlet channel; 2061-four-stage control valve; 207-secondary total nitrogen meter; 208-secondary sulphide detector;
3-a depth digestion tank; 301-a mud pipe; 3011-a mud valve; 3012-submersible sewage pump; 302-a primary lumen aeration device;
4-an upflow sedimentation tank;
a 5-three phase separator;
6-an organic carbon source dosing box; 601-an organic carbon source dosing tube; 6011-organic carbon source dosing valve; 6012-organic carbon source dosing pump;
7-energy storage tube.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be made. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the invention.
Example 1
The embodiment provides a treatment device for treating sulfur-containing wastewater.
As shown in fig. 1, the treatment device comprises a primary digestion tank 1, a secondary digestion tank 2, a deep digestion tank 3 and an upflow sedimentation tank 4, wherein:
the deep digestion tank 3 and the upflow sedimentation tank 4 are positioned in the primary digestion tank 1, the upflow sedimentation tank 4 is positioned above the deep digestion tank 3 and is communicated with the deep digestion tank 3 through a three-phase separator 5, and the upflow sedimentation tank 4 is provided with an overflow port which is communicated with the outside of the primary digestion tank 1;
the deep digestion tank 3 and the outer wall of the upflow sedimentation tank 4 are provided with an energy storage pipe 7, a water inlet of the energy storage pipe 7 is arranged in a cavity formed by the outer side wall of the upflow sedimentation tank 4 and the inner side wall of the primary digestion tank 1, the horizontal height of the water inlet is higher than the horizontal height of an overflow port of the upflow sedimentation tank 4, a water outlet of the energy storage pipe 7 is communicated with the bottom of the deep digestion tank 3, in the treatment device, wastewater to be treated can flow into the deep digestion tank from the primary digestion tank through the energy storage pipe, then enters the upflow sedimentation tank through a three-phase separator, and finally flows out of the primary digestion tank through the overflow port;
the top surface of the upflow sedimentation tank 4 is sealed, the diameter of the top surface is larger than that of the bottom surface, the aerobic granular sludge is filled in the deep digestion tank 3, the bottom of the deep digestion tank 3 is communicated with a sludge discharge pipe 301, a sludge discharge valve 3011 and a submersible sewage pump 3012 are arranged on the sludge discharge pipe 301, the aerobic granular sludge filled in the deep digestion tank can be periodically discharged through the sludge discharge pipe, and meanwhile, elemental sulfur particles attached to the surface of the aerobic granular sludge can be separated and recovered;
the primary digestion tank 1 is internally provided with a primary MABR 101, the primary MABR 101 is arranged in a cavity formed by the inner wall of the primary digestion tank 1, the outer wall of the deep digestion tank 3 and the outer wall of the upflow sedimentation tank 4, the primary MABR 101 comprises a top plate, a bottom plate and a plurality of groups of MABR membranes, the bottom plate of the primary MABR 101 is fixed at the bottom of the primary digestion tank 1, the top plate of the primary MABR 101 is fixed at the top of the primary digestion tank 1 and/or the outer side wall of the deep digestion tank 3, the inner layer of the primary MABR 101 is inoculated with nitrifying bacteria, and the outer layer of the primary MABR 101 is inoculated with sulfur autotrophic denitrifying bacteria and anaerobic ammonia oxidizing bacteria;
the secondary digestion tank 2 is arranged at the upstream of the primary digestion tank 1 and is communicated with the primary digestion tank 1 through a three-stage water inlet channel 205, a secondary MABR 201 is arranged inside the secondary digestion tank 2, the secondary MABR 201 comprises a top plate and a bottom plate, the bottom plate of the secondary MABR 201 is fixed at the bottom of the secondary digestion tank 2, the top plate of the secondary MABR 201 is fixed at the top of the secondary digestion tank 2, nitrifying bacteria are inoculated to the inner layer of the secondary MABR 201, sulfate reducing bacteria and denitrifying bacteria are inoculated to the outer layer of the secondary MABR 201;
the treatment device further comprises an organic carbon source dosing tank 6, the organic carbon source dosing tank 6 is communicated with the secondary digestion tank 2 through an organic carbon source dosing pipe 601, and an organic carbon source dosing valve 6011 and an organic carbon source dosing pump 6012 are arranged on the organic carbon source dosing pipe 601;
the treatment apparatus further includes a primary MABR aeration apparatus 102, a primary lumen aeration apparatus 302, a secondary MABR aeration apparatus 202, and a secondary lumen aeration apparatus 203;
the primary MABR aeration device 102 is connected with the bottom plate of the primary MABR 101, and the gas distribution pipeline of the primary inner cavity aeration device 302 is arranged at the bottom of the deep digestion tank 3;
the secondary MABR aeration device 202 is connected with the bottom plate of the secondary MABR 201, and the gas distribution pipeline of the secondary inner cavity aeration device 203 is arranged at the bottom of the secondary digestion tank 2;
the treatment device further comprises a primary water inlet channel 103 connected with the primary digestion tank 1, and a water outlet of the primary water inlet channel 103 is positioned at the bottom of the primary digestion tank 1;
the treatment device further comprises a secondary water inlet channel 204 connected with the secondary digestion tank 2, wherein a water inlet of the secondary water inlet channel 204 is communicated with the primary water inlet channel 103, a water outlet is positioned at the bottom of the secondary digestion tank 2, a water inlet of the tertiary water inlet channel 205 is positioned at the top of the secondary digestion tank 2, a water outlet is communicated with the primary water inlet channel 103, and a communication port of the secondary water inlet channel 204 and the primary water inlet channel 103 is positioned upstream of a communication port of the tertiary water inlet channel 205 and the primary water inlet channel 103;
a primary control valve 1031 is arranged on the primary water inlet channel 103, the primary control valve 1031 is positioned between the water inlet of the secondary water inlet channel 204 and the water outlet of the tertiary water inlet channel 205, a secondary control valve 2041 is arranged on the secondary water inlet channel 204, and a tertiary control valve 2051 is arranged on the tertiary water inlet channel 205;
the treatment device further comprises a four-stage water inlet channel 206 connected with the secondary digestion tank 2 and the three-stage water inlet channel 205, a communication port of the four-stage water inlet channel 206 and the three-stage water inlet channel 205 is positioned between a water inlet of the three-stage water inlet channel 205 and the three-stage control valve 2051, and a four-stage control valve 2061 is arranged on the four-stage water inlet channel 206;
the primary water inlet channel is provided with a primary total nitrogen detector 104, a primary COD detector 105, a primary sulfide detector 106 and a primary sulfate detector 107, and the primary total nitrogen detector 104, the primary COD detector 105, the primary sulfide detector 106 and the primary sulfate detector 107 are positioned between the water inlet of the primary water inlet channel 103 and the water inlet of the secondary water inlet channel 204;
the tertiary water inlet channel 205 is provided with a secondary total nitrogen detector 207 and a secondary sulfide detector 208, and the secondary total nitrogen detector 207 and the secondary sulfide detector 208 are positioned at the water inlet of the tertiary water inlet channel 205.
Example 2
This example provides a method for treating sulfur-containing wastewater using the sulfur-containing wastewater treatment apparatus provided in example 1.
S1, recording an influent sulfide concentration S1 (mg/L) by the primary sulfide detector at a fixed frequency, recording an influent total nitrogen concentration N1 (mg/L) by the primary total nitrogen detector at a fixed frequency, recording an influent COD value C (mg/L) by the primary COD detector at a fixed frequency, recording an influent sulfate ion concentration SP (mg/L) by the primary sulfate detector at a fixed frequency, recording a sulfide concentration S2 (mg/L) at a water outlet of the secondary digestion tank by the secondary sulfide detector at a fixed frequency, recording a total nitrogen concentration N2 (mg/L) at a water outlet of the secondary digestion tank by the secondary total nitrogen detector at a fixed frequency, and sending a feedback signal to a PLC system;
s2, after the PLC system receives the signals, respectively running a first-level program, a second-level program, a third-level program, a fourth-level program, a fifth-level program, a sixth-level program and a seventh-level program according to the programs shown in FIG. 2:
the running method of each program is as follows:
when the PLC system gives an instruction for running a primary program, the primary control valve is opened, the secondary control valve and the tertiary control valve are closed, and the secondary MABR aeration device and the secondary inner cavity aeration device are closed;
when the PLC system gives an instruction for running a secondary program, the primary control valve and the quaternary control valve are closed, the secondary control valve and the tertiary control valve are opened, and the secondary MABR aeration device and the secondary inner cavity aeration device are opened;
when the PLC system gives an instruction for running a three-level program, the primary control valve and the four-level control valve are closed, the secondary control valve and the three-level control valve are opened, the secondary MABR aeration device is opened, and the secondary inner cavity aeration device is closed;
when the PLC system gives an instruction for running a four-stage program, the primary control valve and the three-stage control valve are closed, the secondary control valve and the four-stage control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the aeration rate of the secondary inner cavity aeration device is reduced with a preset slope;
when the PLC system gives an instruction for running a five-stage program, the primary control valve and the tertiary control valve are closed, the secondary control valve and the quaternary control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the aeration rate of the secondary inner cavity aeration device is increased by a preset slope;
when the PLC system gives an instruction for running a six-level program, the primary control valve and the four-level control valve are closed, the secondary control valve and the three-level control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the organic carbon source dosing box doses the organic carbon source with a preset dosing amount;
when the PLC system gives an instruction for running a seven-level program, the primary control valve and the tertiary control valve are closed, the secondary control valve and the quaternary control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, the aeration rate of the secondary inner cavity aeration device is increased by a preset slope, and the organic carbon source dosing tank is used for dosing an organic carbon source by a preset dosing amount, wherein the COD equivalent of the preset organic carbon source dosing amount is not lower than (4 XN 1-C) mg/L and not higher than (4 XN 1-C+2 XSP) mg/L;
in the process of running the program, the primary MABR aeration device and the primary inner cavity aeration device continuously run, waste water to be treated directly enters the primary digestion tank or enters the primary digestion tank after being treated by the secondary digestion tank, and then flows through the primary digestion tank, the energy storage pipe, the deep digestion tank, the three-phase separator and the upflow sedimentation tank in sequence under the action of gravity self-flow;
s3, after the aerobic granular sludge contained in the deep digestion tank is intercepted by the three-phase separator, settling in a preset period and discharging the sludge out of the deep digestion tank through the sludge discharge pipe, wherein the preset period is 40-50 days, and the elemental sulfur particles attached to the surface of the aerobic granular sludge are separated and recovered.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A treatment apparatus for sulfur-containing wastewater, the treatment apparatus comprising: primary digestion tank (1), secondary digestion tank (2), deep digestion tank (3) and upflow sedimentation tank (4), wherein:
the deep digestion tank (3) and the upflow sedimentation tank (4) are positioned inside the primary digestion tank (1), the upflow sedimentation tank (4) is positioned above the deep digestion tank (3) and is communicated with the deep digestion tank (3) through a three-phase separator (5), the primary digestion tank (1) is communicated with the deep digestion tank (3), and the upflow sedimentation tank (4) is provided with an overflow port leading to the outside of the primary digestion tank (1);
the top surface of the upflow sedimentation tank (4) is sealed, the diameter of the top surface is larger than that of the bottom surface, aerobic granular sludge is filled in the deep digestion tank (3), the bottom of the deep digestion tank (3) is communicated with a sludge discharge pipe (301), and a sludge discharge valve (3011) and a submersible sewage pump (3012) are arranged on the sludge discharge pipe (301);
the secondary digestion tank (2) is arranged at the upstream of the primary digestion tank (1) and is communicated with the primary digestion tank (1) through a three-stage water inlet channel (205);
a primary MABR (101) is arranged in the primary digestion tank (1), the primary MABR (101) is arranged in a cavity formed by the inner wall of the primary digestion tank (1), the outer wall of the deep digestion tank (3) and the outer wall of the upflow sedimentation tank (4), and a secondary MABR (201) is arranged in the secondary digestion tank (2);
the treatment device further comprises an organic carbon source dosing tank (6), the organic carbon source dosing tank (6) is communicated with the secondary digestion tank (2) through an organic carbon source dosing pipe (601), and an organic carbon source dosing valve (6011) and an organic carbon source dosing pump (6012) are arranged on the organic carbon source dosing pipe (601);
the deep digestion tank (3) and the outer wall of the upflow sedimentation tank (4) are provided with energy storage pipes (7), the water inlets of the energy storage pipes (7) are arranged in the cavity formed by the outer side wall of the upflow sedimentation tank (4) and the inner side wall of the primary digestion tank (1), the water inlets are higher than the overflow port of the upflow sedimentation tank (4), and the water outlets of the energy storage pipes (7) are communicated with the bottom of the deep digestion tank (3).
2. The sulfur-containing wastewater treatment device according to claim 1, wherein the primary MABR (101) comprises a top plate and a bottom plate, the bottom plate of the primary MABR (101) is fixed at the bottom of the primary digestion tank (1), the top plate of the primary MABR (101) is fixed at the top of the primary digestion tank (1) and/or the outer side wall of the deep digestion tank (3), the inner layer of the primary MABR (101) is inoculated with nitrifying bacteria, and the outer layer of the primary MABR (101) is inoculated with sulfur autotrophic denitrifying bacteria and anammox bacteria;
the secondary MABR (201) comprises a top plate and a bottom plate, the bottom plate of the secondary MABR (201) is fixed at the bottom of the secondary digestion tank (2), the top plate of the secondary MABR (201) is fixed at the top of the secondary digestion tank (2), nitrifying bacteria are inoculated to the inner layer of the secondary MABR (201), and sulfate reducing bacteria and denitrifying bacteria are inoculated to the outer layer of the secondary MABR (201).
3. The sulfur-containing wastewater treatment plant of claim 2, further comprising a primary MABR aeration device (102), a primary lumen aeration device (302), a secondary MABR aeration device (202), and a secondary lumen aeration device (203);
the primary MABR aeration device (102) is connected with the bottom plate of the primary MABR (101), and the gas distribution pipeline of the primary inner cavity aeration device (302) is arranged at the bottom of the deep digestion tank (3);
the secondary MABR aeration device (202) is connected with the bottom plate of the secondary MABR (201), and the gas distribution pipeline of the secondary inner cavity aeration device (203) is arranged at the bottom of the secondary digestion tank (2).
4. The sulfur-containing wastewater treatment device according to claim 1, further comprising a primary water inlet channel (103) connected with the primary digestion tank (1), wherein a water outlet of the primary water inlet channel (103) is positioned at the bottom of the primary digestion tank (1);
the treatment device further comprises a secondary water inlet channel (204) connected with the secondary digestion tank (2), wherein a water inlet of the secondary water inlet channel (204) is communicated with the primary water inlet channel (103), a water outlet is positioned at the bottom of the secondary digestion tank (2), a water inlet of the tertiary water inlet channel (205) is positioned at the top of the secondary digestion tank (2), a water outlet is communicated with the primary water inlet channel (103), and a communication port of the secondary water inlet channel (204) and the primary water inlet channel (103) is positioned at the upstream of a communication port of the tertiary water inlet channel (205) and the primary water inlet channel (103);
a primary control valve (1031) is arranged on the primary water inlet channel (103), the primary control valve (1031) is positioned between a water inlet of the secondary water inlet channel (204) and a water outlet of the tertiary water inlet channel (205), a secondary control valve (2041) is arranged on the secondary water inlet channel (204), and a tertiary control valve (2051) is arranged on the tertiary water inlet channel (205);
the treatment device further comprises a four-stage water inlet channel (206) connected with the secondary digestion tank (2) and the three-stage water inlet channel (205), a communication port of the four-stage water inlet channel (206) and the three-stage water inlet channel (205) is positioned between a water inlet of the three-stage water inlet channel (205) and the three-stage control valve (2051), and the four-stage control valve (2061) is arranged on the four-stage water inlet channel (206).
5. The sulfur-containing wastewater treatment device according to claim 4, wherein a primary total nitrogen detector (104), a primary COD detector (105), a primary sulfide detector (106) and a primary sulfate detector (107) are arranged on the primary water inlet channel, and the primary total nitrogen detector (104), the primary COD detector (105), the primary sulfide detector (106) and the primary sulfate detector (107) are positioned between the water inlet of the primary water inlet channel (103) and the water inlet of the secondary water inlet channel (204);
the three-stage water inlet channel (205) is provided with a secondary total nitrogen detector (207) and a secondary sulfide detector (208), and the secondary total nitrogen detector (207) and the secondary sulfide detector (208) are positioned at the water inlet of the three-stage water inlet channel (205).
6. A method for treating sulfur-containing wastewater, characterized in that the method is performed by the sulfur-containing wastewater treatment apparatus according to any one of claims 1 to 5, the treatment apparatus being controlled by a PLC system that operates according to the following formula:
wherein:
s1 is the concentration of sulfur ions in the sulfur-containing wastewater of the initial inflow water, mg/L;
n1 is the total nitrogen concentration of the sulfur-containing wastewater of the initial inflow water, mg/L;
c is the COD value of the sulfur-containing wastewater of the initial inflow water, mg/L;
s2 is the concentration of sulfur ions at the water outlet of the secondary digestion tank, and mg/L;
n2 is the total nitrogen concentration at the water outlet of the secondary digestion tank, and mg/L.
7. The process of claim 6, wherein when the PLC system issues instructions to run the primary program, the primary control valve is opened, the secondary control valve and the tertiary control valve are closed, and the secondary MABR aerator and the secondary lumen aerator are closed;
when the PLC system gives an instruction for running a secondary program, the primary control valve and the quaternary control valve are closed, the secondary control valve and the tertiary control valve are opened, and the secondary MABR aeration device and the secondary inner cavity aeration device are opened;
when the PLC system gives an instruction for running a three-level program, the primary control valve and the four-level control valve are closed, the secondary control valve and the three-level control valve are opened, the secondary MABR aeration device is opened, and the secondary inner cavity aeration device is closed;
when the PLC system gives an instruction for running a four-stage program, the primary control valve and the three-stage control valve are closed, the secondary control valve and the four-stage control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the aeration rate of the secondary inner cavity aeration device is reduced with a preset slope;
when the PLC system gives an instruction for running a five-stage program, the primary control valve and the three-stage control valve are closed, the secondary control valve and the four-stage control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the aeration rate of the secondary inner cavity aeration device is increased by a preset slope;
when the PLC system gives an instruction of running a six-level program, the primary control valve and the four-level control valve are closed, the secondary control valve and the three-level control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, and the organic carbon source dosing box is used for dosing the organic carbon source with a preset dosing amount;
when the PLC system gives an instruction for running a seven-level program, the primary control valve and the tertiary control valve are closed, the secondary control valve and the quaternary control valve are opened, the secondary MABR aeration device is opened, the secondary inner cavity aeration device is closed, the aeration rate of the secondary inner cavity aeration device is increased by a preset slope, and the organic carbon source dosing box doses the organic carbon source by a preset dosing amount;
in the treatment method, a primary MABR aeration device and a primary inner cavity aeration device continuously operate, wastewater to be treated directly enters the primary digestion tank or enters the primary digestion tank after being treated by the secondary digestion tank, and then flows through the primary digestion tank, an energy storage pipe, the deep digestion tank, the three-phase separator and the upflow sedimentation tank in sequence under the action of gravity self-flow.
8. The method according to claim 7, wherein the COD equivalent of the preset dosage of the organic carbon source chemical tank is not lower than 4 XN 1-Cmg/L and not higher than 4 XN 1-C+2 XSPmg/L, SP is the sulfate ion concentration of the initial feed water, mg/L.
9. The treatment method according to claim 7, wherein after the aerobic granular sludge contained in the deep digestion tank is intercepted by the three-phase separator, the aerobic granular sludge is settled in a preset period and discharged out of the deep digestion tank through the sludge discharge pipe, the preset period is 40-50 days, and elemental sulfur particles attached to the surface of the aerobic granular sludge are separated and recovered.
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| US20180282189A1 (en) * | 2017-03-31 | 2018-10-04 | University Of South Florida | Struvite precipitation and microbial fuel cell for recovery of nutrients and energy from digester effluent |
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