CN113582412A - Advanced sewage treatment device - Google Patents
Advanced sewage treatment device Download PDFInfo
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- CN113582412A CN113582412A CN202110943627.0A CN202110943627A CN113582412A CN 113582412 A CN113582412 A CN 113582412A CN 202110943627 A CN202110943627 A CN 202110943627A CN 113582412 A CN113582412 A CN 113582412A
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- flat
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- ceramic membrane
- flocculation
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- 239000010865 sewage Substances 0.000 title claims abstract description 24
- 239000012528 membrane Substances 0.000 claims abstract description 66
- 238000005189 flocculation Methods 0.000 claims abstract description 61
- 230000016615 flocculation Effects 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000001914 filtration Methods 0.000 claims abstract description 39
- 239000000919 ceramic Substances 0.000 claims abstract description 36
- 238000005273 aeration Methods 0.000 claims abstract description 25
- 239000010802 sludge Substances 0.000 claims abstract description 23
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims abstract description 3
- 239000013049 sediment Substances 0.000 claims abstract description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000001556 precipitation Methods 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(IV) oxide Inorganic materials O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 3
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims description 3
- 150000001768 cations Chemical class 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000012777 electrically insulating material Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 5
- 241000894006 Bacteria Species 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- -1 aluminum ions Chemical class 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000929 Ru alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- DPGAAOUOSQHIJH-UHFFFAOYSA-N ruthenium titanium Chemical compound [Ti].[Ru] DPGAAOUOSQHIJH-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
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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
-
- 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
- C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46152—Electrodes characterised by the shape or form
-
- 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
- C02F2101/105—Phosphorus 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
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a sewage advanced treatment device, which comprises a suction pump, an electric flocculation device and an ozone-flat ceramic membrane filtering device, wherein the electric flocculation device and the ozone-flat ceramic membrane filtering device are arranged side by side; the anode plate group and the cathode plate group are respectively connected with the anode and the cathode of the power supply and form a loop with the power supply; the sludge settling unit is arranged at the bottom of the flocculation tank and is used for collecting generated sediment; the lower part of the tank wall at one side of the flocculation tank, which is far away from the ozone-flat ceramic membrane filtering device, is provided with a water inlet; the upper end of the tank wall of the flocculation tank close to one side of the ozone-flat ceramic membrane filtering device is provided with a flow guide pipeline; the ozone-flat ceramic membrane filtering device is used for blowing ozone into water, treating the water through aeration and filtering the water through a flat membrane; the suction pump is used for pumping out the water filtered by the flat membrane. The device can get rid of suspended solid, TP, ammonia nitrogen, turbidity, colourity in the aquatic betterly, ensures that the aquatic bacterium is up to standard.
Description
Technical Field
The invention relates to the field of advanced sewage treatment, in particular to an advanced sewage treatment device for removing phosphorus, COD (chemical oxygen demand) and turbidity and meeting the requirements of bacteria in effluent.
Technical Field
With the gradual progress of society, the requirements of people on living level and living environment are gradually increased. Particularly in recent years, the comprehensive treatment strength of the country to the water environment is gradually increased, so that the water environment is obviously improved. In the domestic sewage treatment process, the original effluent standard of a sewage treatment plant is improved from primary B in discharge Standard of pollutants for municipal wastewater treatment plant (GB8918-2002) to primary A. With the stricter comprehensive environmental regulation and the stricter requirements on the water environment in China, the indexes are improved from the original first class A to class four (discharge standard of pollutants in water of municipal wastewater treatment plants (DB11/890-2012)), and the standard requirements in some places are stricter. The existing sewage treatment plants in large and medium-sized cities are basically saturated and mainly face the problem of upgrading and modifying for advanced treatment, while small-sized sewage treatment plants or sewage treatment stations also face certain problems in the aspects of ensuring the effectiveness and the long-term property of the effluent water quality or improving the water quality indexes, and mainly the relevant indexes of COD (chemical oxygen demand), ammonia nitrogen, chromaticity, Total Phosphorus (TP) and the like of the effluent water do not reach the standard.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the sewage advanced treatment device which can effectively ensure that the quality of the effluent water is stable and reaches the standard.
Therefore, the invention adopts the following technical scheme:
the utility model provides a sewage advanced treatment unit, includes suction pump and electric flocculation device and ozone-dull and stereotyped ceramic membrane filter equipment that set up side by side, electric flocculation device includes flocculation tank and sets up anodal polar plate group, negative pole polar plate group and the sludge settling unit in the flocculation tank, positive poleThe electrode plate group and the cathode electrode plate group are respectively connected with the positive electrode and the negative electrode of a power supply to form a loop with the power supply, and metal cations generated by electrolysis and OH in water-Carrying out polymerization reaction to generate floc with strong adsorption capacity, and forming precipitate with impurities in water through the action of electric neutralization and net catching; the sludge settling unit is arranged at the bottom of the flocculation tank and is used for collecting the sediment; a water inlet is formed in the lower part of the tank wall at one side of the flocculation tank, which is far away from the ozone-flat ceramic membrane filtering device, and is used for introducing sewage; a flow guide pipeline is arranged at the upper end of the tank wall of one side of the flocculation tank close to the ozone-flat ceramic membrane filtering device and is used for introducing flocculated water into the ozone-flat ceramic membrane filtering device; the ozone-flat ceramic membrane filtering device is used for blowing ozone into water, treating the water through aeration and filtering the water through a flat membrane; the suction pump is connected with the flat membrane through a pipeline and is used for pumping out the water filtered by the flat membrane.
The anode plate group comprises a flat plate electrode and a plurality of corrugated plate electrodes which are vertically and parallelly arranged, the tops of the flat plate electrode and the corrugated plate electrodes are connected through a plurality of insulated connecting rods and are mounted on the upper part of the flocculation tank in a suspended mode through the connecting rods, and the flat plate electrode is connected with the inner wall of one side, away from the ozone-flat ceramic membrane filtering device, of the flocculation tank in an insulated mode;
the cathode electrode plate group comprises a flat electrode and a plurality of corrugated plate electrodes which are vertically and parallelly arranged, the bottoms of the flat electrode and the corrugated plate electrodes are connected through a plurality of insulating connecting rods and are arranged at the lower part of the flocculation tank through the connecting rods, and the flat electrode is in insulating connection with the inner wall at the other side of the flocculation tank;
the corrugated plate electrodes of the anode electrode plate group and the cathode electrode plate group are arranged in an inserting mode and are not in contact with each other, the end faces of the two sides of each of the corrugated plate electrodes and the end faces of the two sides of each of the corrugated plate electrodes are in insulation connection with the wall surface of the flocculation tank, and the upper space of the flocculation tank is divided into a plurality of chambers with the tops or the bottoms communicated with each other;
a water inlet is arranged at the lower part of the tank wall at one side of the flocculation tank, which is far away from the ozone-flat ceramic membrane filtering device; a flow guide pipeline is arranged at the upper end of the tank wall at one side of the flocculation tank close to the ozone-flat ceramic membrane filtering device and is used for introducing flocculated water into the ozone-flat ceramic membrane filtering device.
The ozone-flat ceramic membrane filtering device comprises a filtering tank, a flat membrane, an aeration pipeline and an aeration disc, wherein the flat membrane is arranged in the filtering tank and above the aeration disc; the aeration pipeline extends into the bottom of the filter tank and is used for conveying ozone to the filter tank; a plurality of aeration discs are arranged on the aeration pipeline 35.
Preferably, the flat membrane is a flat ceramic membrane; the anode plate group is made of aluminum, iron or aluminum-iron alloy; the cathode plate group is made of Ti/RuO2And (4) preparing. The corrugated plate electrodes of the anode plate group and the cathode plate group can be same-wave polar plates or different-wave polar plates.
In one embodiment of the invention, the sludge hopper is in a V-groove shape; the projection distance of two adjacent corrugated plate electrodes is 1-3cm, and the angle of the folded angle of the corrugated plate electrodes is 90 degrees; the distance between the flat plate electrode and the adjacent corrugated plate electrode is 2-3 cm.
For safety reasons, the flocculation vat is preferably made of an electrically insulating material.
The invention has the following beneficial effects:
1. the sewage advanced treatment device can well remove suspended matters, TP, ammonia nitrogen, turbidity and chromaticity in water and ensure that bacteria in the water reach the standard;
2. in the device, an anode plate and a cathode plate are made into same-wave or different-wave plates, and play a role in accelerating flocculation and precipitation in the electrolysis process due to the change of flow velocity;
3. the water treated by the electric flocculation device contains partial aluminum ions and iron ions for flocculation and precipitation, a small amount of aluminum ions and iron ions enter the membrane pool, ozone is introduced into the membrane pool, and the ozone generates OH (hydroxyl radical) under the catalysis of the iron ions and the aluminum ions to further oxidize reducing substances in the water, so that the pollution of a flat membrane can be effectively reduced, the filtration period is prolonged, and the quality of the effluent is effectively ensured.
Drawings
FIG. 1 is a front perspective view of an advanced wastewater treatment apparatus according to the present invention;
FIG. 2 is a schematic top view of the sewage advanced treatment apparatus according to the present invention;
FIG. 3 is a schematic structural view of the anode plate assembly of FIG. 1;
FIG. 4 is a schematic view of the structure of the cathode plate assembly of FIG. 1;
fig. 5 is a schematic top view of the cathode plate assembly of fig. 4.
In the figure:
11. flocculation tank 12, water inlet 13, baffle 14, sludge bucket 15, sludge discharge pipeline
21. Anode plate group 22, cathode plate group 31, flow guide pipeline 32, air bubble 33 and flat membrane
34. A filter tank 35, an aeration pipeline 36, an aeration disc 37, a pipeline 38 and a suction pump
Detailed Description
The structure of the sewage advanced treatment apparatus of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the advanced wastewater treatment apparatus of the present invention comprises a suction pump 38, and an electric flocculation apparatus and an ozone-flat ceramic membrane filtration apparatus which are arranged side by side. In the embodiment shown in the figure, the electroflocculation unit is located on the left side and the ozone-flat ceramic membrane filtration unit is located on the right side.
The electric flocculation device comprises: a flocculation tank 11, and an anode electrode plate group 21, a cathode electrode plate group 22 and a sludge precipitation unit which are arranged in the flocculation tank 11.
The flocculation tank 11 is made of non-conductive materials and has the characteristics of corrosion resistance and high strength.
The sludge precipitation unit is arranged at the bottom of the flocculation tank 11, the periphery of the sludge precipitation unit is hermetically connected with the flocculation tank 11, and the flocculation tank 11 is divided into an upper space and a bottom space which are not communicated with each other. The sludge precipitation unit consists of a plurality of sludge hoppers 14 and partition plates 13, and the plurality of sludge hoppers 14 are arranged side by side and are connected in sequence; the partition plate 13 is horizontally arranged on one side far away from the ozone-flat ceramic membrane filtering device and is connected with an adjacent sludge hopper. The bottom of each sludge hopper 14 is respectively connected with a sludge discharge pipeline 15, and a valve is arranged on the sludge discharge pipeline 15.
The structures of the anode plate group 21 and the cathode plate group 22 are shown in fig. 3 to 5. The anode plate group 21 comprises a flat plate electrode 21b and a plurality of corrugated plate electrodes 21a which are vertically and parallelly arranged, the tops of the flat plate electrode 21b and the corrugated plate electrodes 21a are connected through a plurality of insulating connecting rods 21c and are mounted on the upper portion of the flocculation tank 11 in a suspension mode through the connecting rods 21c, and the flat plate electrode 21b is far away from the flocculation tank 11 and is connected with the inner wall of one side of the ozone-flat ceramic membrane filtering device in an insulating mode. The cathode plate group 22 comprises a flat plate electrode 22b and a plurality of corrugated plate electrodes 22a which are vertically and parallelly arranged, the bottoms of the flat plate electrode 22b and the plurality of corrugated plate electrodes 22a are connected through a plurality of insulating connecting rods 22c and are arranged at the lower part of the flocculation tank 11 through the connecting rods 22c, and the flat plate electrode 22b is connected with the inner wall of the other side of the flocculation tank 11 in an insulating way. The corrugated plate electrodes of the anode electrode plate group 21 and the cathode electrode plate group 22 are arranged in an inserting mode and are not in contact with each other, the end faces of the two sides of the corrugated plate electrodes and the end faces of the two sides of the plate electrodes are connected with the wall surface of the flocculation tank 11 in an insulating mode, and the upper space of the flocculation tank 11 is divided into a plurality of cavities communicated with the top or the bottom. Each polar plate of the anode polar plate group is connected with the positive pole of the power supply, and each polar plate of the cathode polar plate group is connected with the negative pole of the power supply and forms a loop with the power supply.
A water inlet 12 is arranged at the lower part of the tank wall at one side of the flocculation tank 11 far away from the ozone-flat ceramic membrane filtering device; a flow guide pipeline 31 is arranged at the upper end of the tank wall of the flocculation tank 11 close to one side of the ozone-flat ceramic membrane filtering device and is used for introducing flocculated water into the ozone-flat ceramic membrane filtering device.
The ozone-flat ceramic membrane filtering device comprises: a filter tank 34, a flat membrane 33, an aeration pipeline 35 and an aeration disc 36. The flat membrane 33 is arranged in the filter tank 34, and the aeration pipeline 35 extends into the bottom of the filter tank 34 and is used for conveying ozone into the filter tank 34; a plurality of aeration disks 36 are provided on the aeration pipe 35. The flat membrane 33 is arranged above the aeration disc 36, and the flat membrane 33 is preferably a flat ceramic membrane.
The suction pump 38 is connected to the flat membrane 33 via a pipe 37, and is used for pumping out the water filtered by the flat membrane 33.
The anode plate group 21 can be made of aluminum or iron, and is preferably made of aluminum-iron alloy; the cathode plate group can be formed by Ti/RuO2Ti, stainless steel, Pt or carbon plate, preferably Ti/RuO2(titanium ruthenium alloy); the corrugated plate electrodes of the anode plate group 21 and the cathode plate group 22 are identical wave plates or different wave plates (different waves are opposite in wave crest and opposite in wave trough to form staggered arrangement; identical waves are opposite in wave crest and wave trough to form staggered arrangement).
In the embodiment shown in fig. 1, the sludge hopper 14 is in a V-groove shape, the projection distance d between the adjacent corrugated plate electrodes 21a and 22a is 1-3cm, preferably 2cm, and the excessive distance increases the resistance and consumes large power; if the distance is too close, the distance is too small, and the water passing resistance is increased. In addition, the distance between the flat plate electrode 21b and the adjacent corrugated plate electrode 22a, and the distance between the flat plate electrode 22b and the adjacent corrugated plate electrode 21a are 2 to 3 cm. In the same-wave polar plate, the angle of the break angle of each polar plate is 90 degrees, the length and the height of the polar plate are mainly adjusted by the size of the treated water quantity, the retention time is mainly met, and the length of the retention time is determined by the concentration of impurities needing to be removed in the water quality of the inlet water and the removal degree needed.
The process and mechanism of the device for treating sewage are as follows:
referring to fig. 1 and 2, the sewage to be treated enters the flocculation tank 11 from the bottom water inlet 12, the water flow rises along the gap between the corrugated plate electrodes of the leftmost flat plate electrode, turns back after reaching the top, falls along the gap between the two corrugated plate electrodes, and repeatedly rises-falls-rises-falls, so that the sewage flows along the serpentine channel in a propelling manner. Referring to fig. 2, the black solid points in the figure indicate that the water flows from bottom to top, the x points indicate that the water flows from top to bottom, and the whole flow direction is a plug flow type.
Taking the anode plate group 21 as an aluminum plate as an example, since the anode plate group is connected with the positive electrode of the power supply, the anode plate undergoes an oxidation reaction to release Al under the action of an applied current in the flowing process of the sewage3+With OH in water-Polymerization reaction is carried out to generate Al (OH) with strong adsorption capacityn+Floc, suspended substance and colloidal substance in the adhesion aquatic, begin to form less floc, under the impetus of rivers, because every dog-ear of different ripples (or with ripples) folded plate passageway is 90, rivers up-and-down motion simultaneously, can increase the collision probability of aquatic floc like this, make the floc grow gradually of aquatic, simultaneously because fluidic flow direction constantly changes, produce on the surface of negative and positive pole polar plate and erode, the at utmost has alleviateed the concentration polarization phenomenon that produces at the electrolysis in-process, make Al3+The ions are uniformly distributed in the water. The settling velocity gradually increases as the flocs become larger, so that a part of the flocs can settle into the sludge hopper 14 at the bottom of the tank. The deposited flocs can be discharged in the form of sludge through a sludge discharge pipe 15.
The water treated by the flocculation tank 11 contains a part of Al3+It has a certain catalytic action on ozone. The treated water flows into the ozone-flat membrane treatment unit through the diversion pipeline 31. Ozone produced by an ozone generator (not shown) is delivered to the bottom of the ozone-flat membrane treatment unit through an aeration pipe 35, and is aerated through a titanium alloy aeration disk 36 at the bottom. In Al3+Under the catalytic action of the ozone, COD, ammonia, nitrogen and chromaticity in water can be further removed, and simultaneously, the water in the filter tank 34 can be further stirred, so that the thickness of a filter cake layer of the flat membrane 33 is effectively reduced, and the pollution to the flat membrane 33 is delayed. In normal operation, the pump 38 pumps the flat membrane 33 through the pipe 37, so that the flat membrane 33 produces water. The introduction of ozone can further oxidize organic matters adsorbed on the flat membrane, thereby reducing the pollution of pollutants to the flat membrane.
In addition, pretreatment equipment, including settling, desanding, biochemical or other suitable equipment, can be added before the device of the invention as required.
At a current density of 9mA/cm2And the water quality of inlet and outlet water of the device is measured through experiments under the condition that the distance between the polar plates is 2cm as follows:
| water sample | COD | TP | Ammonia nitrogen | Color intensity |
| Inflow (mg/L) | 50 | 2.5 | 8 | 64 |
| Water outlet (mg/L) | 15 | 0.1 | 0 | 4 |
According to the detection results, the device disclosed by the invention can effectively reduce TP, ammonia nitrogen and COD in the sewage, and can effectively reduce the chromaticity of the sewage.
Claims (10)
1. The utility model provides a sewage advanced treatment unit which characterized in that: comprises a suction pump (38), an electric flocculation device and an ozone-flat ceramic membrane filtering device which are arranged side by side,
the electric flocculation device comprises a flocculation tank (11), and an anode plate group (21), a cathode plate group (22) and a sludge precipitation unit which are arranged in the flocculation tank (11), wherein the anode plate group (21) and the cathode plate group (22) are respectively connected with a positive electrode and a negative electrode of a power supply, and metal cations generated by electrolysis and metal cations in waterOH-Carrying out polymerization reaction to generate floc with strong adsorption capacity, and forming precipitate together with suspended substances and colloidal substances in water through the action of electric neutralization and net catching; the sludge settling unit is arranged at the bottom of the flocculation tank (11) and is used for collecting the sediments;
a water inlet (12) is formed in the lower part of the tank wall of the flocculation tank (11) at one side far away from the ozone-flat ceramic membrane filtering device and is used for introducing sewage; a flow guide pipeline (31) is arranged at the upper end of the tank wall of the flocculation tank (11) close to one side of the ozone-flat ceramic membrane filtering device and is used for introducing water subjected to flocculation precipitation into the ozone-flat ceramic membrane filtering device;
the ozone-flat ceramic membrane filter device is used for blowing ozone into water, treating the water through aeration and filtering the water through a flat membrane 33;
the suction pump (38) is connected with the flat membrane (33) through a pipeline (37) and is used for pumping out the water filtered by the flat membrane (33).
2. The advanced wastewater treatment plant according to claim 1, characterized in that: the anode electrode plate group (21) comprises a flat electrode (21b) and a plurality of corrugated plate electrodes (21a) which are vertically and parallelly arranged, the tops of the flat electrode (21b) and the corrugated plate electrodes (21a) are connected through a plurality of insulating connecting rods (21c) and are suspended on the upper part of the flocculation tank (11) through the connecting rods (21c), and the flat electrode (21b) is in insulating connection with the inner wall of one side, away from the ozone-flat ceramic membrane filtering device, of the flocculation tank (11);
the cathode electrode plate group (22) comprises a flat electrode (22b) and a plurality of corrugated plate electrodes (22a) which are vertically and parallelly arranged, the bottoms of the flat electrode (22b) and the corrugated plate electrodes (22a) are connected through a plurality of insulating connecting rods (22c) and are arranged at the lower part of the flocculation tank (11) through the connecting rods (22c), and the flat electrode (22b) is in insulating connection with the inner wall of the other side of the flocculation tank (11);
corrugated plate electrodes of the anode electrode plate group (21) and the cathode electrode plate group (22) are arranged in an inserting mode and are not in contact with each other, end faces of two sides of the corrugated plate electrodes and the end faces of two sides of the flat plate electrodes are in insulation connection with the wall surface of the flocculation tank (11), and the upper space of the flocculation tank (11) is divided into a plurality of chambers with communicated tops or bottoms;
a water inlet (12) is arranged at the lower part of the tank wall at one side of the flocculation tank (11) far away from the ozone-flat ceramic membrane filtering device; the upper end of the tank wall of the flocculation tank (11) close to one side of the ozone-flat ceramic membrane filtering device is provided with a flow guide pipeline (31) for introducing water subjected to flocculation precipitation into the ozone-flat ceramic membrane filtering device.
3. The advanced wastewater treatment plant according to claim 1, characterized in that: the ozone-flat ceramic membrane filtering device comprises a filtering tank (34), a flat membrane (33), an aeration pipeline (35) and aeration discs (36), wherein the flat membrane (33) is arranged in the filtering tank (34) and above the aeration discs (36), the aeration pipeline (35) extends into the bottom of the filtering tank (34) and is used for conveying ozone into the filtering tank (34), and a plurality of aeration discs (36) are arranged on the aeration pipeline (35).
4. The advanced wastewater treatment plant according to claim 1, characterized in that: the flat membrane is a flat ceramic membrane.
5. The advanced wastewater treatment plant according to claim 1, characterized in that: the anode plate group (21) is made of aluminum, iron or aluminum-iron alloy; the cathode plate group is made of Ti/RuO2And (4) preparing.
6. The advanced wastewater treatment plant according to claim 1, characterized in that: the corrugated plate electrodes of the anode plate group (21) and the cathode plate group (22) are identical-wave plates or different-wave plates.
7. The advanced wastewater treatment plant according to claim 1, characterized in that: the sludge hopper (14) is in a V-shaped groove shape.
8. The advanced wastewater treatment plant according to claim 1, characterized in that: the projection distance of the adjacent corrugated plate electrodes (21a) and (22a) is 1-3cm, and the angle of the folding angle of the corrugated plate electrodes is 90 degrees.
9. The advanced wastewater treatment plant according to claim 1, characterized in that: the distance between the flat plate electrode (21b or 22b) and the adjacent corrugated plate electrode (22a or 21a) is 2-3 cm.
10. The advanced wastewater treatment plant according to claim 1, characterized in that: the flocculation tank (11) is made of an electrically insulating material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110943627.0A CN113582412A (en) | 2021-08-17 | 2021-08-17 | Advanced sewage treatment device |
| NL2029219A NL2029219B1 (en) | 2021-08-17 | 2021-09-21 | Apparatus for advanced sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110943627.0A CN113582412A (en) | 2021-08-17 | 2021-08-17 | Advanced sewage treatment device |
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| CN113582412A true CN113582412A (en) | 2021-11-02 |
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| CN202110943627.0A Pending CN113582412A (en) | 2021-08-17 | 2021-08-17 | Advanced sewage treatment device |
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| CN (1) | CN113582412A (en) |
| NL (1) | NL2029219B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116282400A (en) * | 2023-03-15 | 2023-06-23 | 吉林大学 | Double-pulse piezoelectric flocculation method for treating mine acid wastewater containing heavy metals |
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| CN113200583A (en) * | 2021-05-13 | 2021-08-03 | 华北理工大学 | Denitrification treatment device and method for polluted water |
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| JP2002250792A (en) * | 2001-02-26 | 2002-09-06 | Nuclear Services Co | Radioactive waste liquid processor |
| CN101560040B (en) * | 2009-05-08 | 2011-07-13 | 北京清大国华环保科技有限公司 | Method and device for processing pharmaceutical wastewater by pulse electrocoagulation-MBR |
| CN208454703U (en) * | 2018-05-17 | 2019-02-01 | 乌鲁木齐新晟明业环保科技有限公司 | A kind of waste liquid of drilling processing system |
| CN111732295A (en) * | 2020-07-22 | 2020-10-02 | 南京林业大学 | Combined building reclaimed water recycling system |
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| CN106745970A (en) * | 2016-12-07 | 2017-05-31 | 清华大学深圳研究生院 | A kind of processing system and method for removing organic extracts from water and ammonia nitrogen |
| CN209759191U (en) * | 2019-03-08 | 2019-12-10 | 杭州晓水环保技术有限公司 | Device for treating livestock and poultry wastewater by virtue of electric flocculation and ozone nano-bubble air flotation |
| CN113200583A (en) * | 2021-05-13 | 2021-08-03 | 华北理工大学 | Denitrification treatment device and method for polluted water |
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| CN116282400A (en) * | 2023-03-15 | 2023-06-23 | 吉林大学 | Double-pulse piezoelectric flocculation method for treating mine acid wastewater containing heavy metals |
Also Published As
| Publication number | Publication date |
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| NL2029219A (en) | 2021-11-09 |
| NL2029219B1 (en) | 2022-04-29 |
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