CN116803930B - Pig farm effluent disposal system - Google Patents
Pig farm effluent disposal system Download PDFInfo
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- CN116803930B CN116803930B CN202311016821.XA CN202311016821A CN116803930B CN 116803930 B CN116803930 B CN 116803930B CN 202311016821 A CN202311016821 A CN 202311016821A CN 116803930 B CN116803930 B CN 116803930B
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- 239000002351 wastewater Substances 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000005192 partition Methods 0.000 claims abstract description 58
- 239000012528 membrane Substances 0.000 claims abstract description 49
- 238000005273 aeration Methods 0.000 claims abstract description 44
- 239000000919 ceramic Substances 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 238000000926 separation method Methods 0.000 claims abstract description 32
- 238000011282 treatment Methods 0.000 claims abstract description 31
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005188 flotation Methods 0.000 claims abstract description 6
- 239000001301 oxygen Substances 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 239000010802 sludge Substances 0.000 claims description 62
- 230000029087 digestion Effects 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 14
- 238000005191 phase separation Methods 0.000 claims description 11
- 238000011221 initial treatment Methods 0.000 claims description 9
- 238000006460 hydrolysis reaction Methods 0.000 claims description 8
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- 230000007062 hydrolysis Effects 0.000 claims description 7
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- 238000005516 engineering process Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 7
- 239000000706 filtrate Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010794 food waste Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- KMQAPZBMEMMKSS-UHFFFAOYSA-K calcium;magnesium;phosphate Chemical compound [Mg+2].[Ca+2].[O-]P([O-])([O-])=O KMQAPZBMEMMKSS-UHFFFAOYSA-K 0.000 description 2
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- 229920002488 Hemicellulose Polymers 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a pig farm wastewater treatment system. The treatment system comprises an air flotation machine, a complete mixing reactor, an anaerobic ceramic membrane bioreactor and an internal and external partition reactor which are communicated in sequence; the reactor comprises an outer shell, a second separation barrel, a first separation barrel clamped between the outer shell and the second separation barrel, an aeration disc positioned under the second separation barrel and used for exposing oxygen, and a water inlet pipe extending out of the aeration disc, wherein a reaction chamber enclosed by the outer shell is divided into an aerobic zone, an anoxic zone and an anaerobic zone, and under the action of the rising force provided by the aeration disc, wastewater flowing in through the water inlet pipe firstly flows into the aerobic zone, then flows into the anoxic zone and the anaerobic zone and circularly flows. The wastewater treatment system provided by the invention has the advantages of simple and compact structure, easiness in control and high treatment efficiency.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a pig farm wastewater treatment system.
Background
Pig farm wastewater mainly originates from pig manure, pig urine and farm flushing water. The wastewater is rich in nitrogen and phosphorus, organic matters and high suspended matters, is high-concentration organic wastewater, and can cause pollution to water body when being directly discharged.
At present, the treatment process which is more effective for pig farm wastewater comprises a direct SBR process and an Anarwia process, and the Anarwia process is superior to the direct SBR process in operation cost and water outlet effect. COD and NH4 in water treated by two processes + N water meets the pollutant emission standard of livestock and poultry raising industry (GB 18596-2001), but the current increasingly improved environment-friendly requirement cannot be met, and the problems of complex facilities, high energy consumption, large sludge production amount, high subsequent sludge treatment cost and need of professional personnel management still exist.
Disclosure of Invention
The invention aims to provide a pig farm wastewater treatment system which is simple and compact in structure, clean, efficient, environment-friendly, easy to control, convenient and quick.
To achieve the above object, the present invention provides a pig farm wastewater treatment system comprising:
the air floatation machine is used for removing excrement and impurities in the wastewater in a filtering mode to obtain wastewater after primary treatment;
the water inlet of the complete mixing reactor is communicated with the wastewater outlet of the air flotation machine, organic matters in the wastewater after primary treatment are subjected to hydrolysis and acidification reaction through an anaerobic digestion technology to obtain wastewater after secondary treatment, and the complete mixing reactor comprises a reaction tank communicated with the water outlet of the air flotation machine, a stirrer contained in the reaction tank and a three-phase separation assembly contained in the reaction tank and positioned above a stirring paddle of the stirrer;
the liquid inlet of the anaerobic ceramic membrane bioreactor is communicated with the water outlet of the completely mixed reactor, and the wastewater after the secondary treatment is subjected to methanation reaction by an anaerobic digestion technology to obtain wastewater after the tertiary treatment;
the internal and external partition reactor is used for performing denitrification treatment on wastewater after three-stage treatment and comprises a shell, a first partition cylinder, a second partition cylinder, an aeration disc and a water inlet pipe, wherein the first partition cylinder is contained in the shell and is arranged with the shell at intervals, the second partition cylinder is contained in the first partition cylinder and is arranged with the first partition cylinder at intervals, the aeration disc is installed in the shell and is positioned right below the second partition cylinder, one end of the aeration disc is communicated with a liquid outlet of the anaerobic ceramic membrane bioreactor, the other end of the aeration disc extends out of the aeration disc to the position below the second partition cylinder, the aeration disc is used for providing oxygen so that an aerobic zone is formed in a space in the second partition cylinder, an anoxic zone is formed in a zone between the second partition cylinder and the first partition cylinder, and an anaerobic zone is formed in a zone between the first partition cylinder, and wastewater flowing in through the water inlet pipe under the action of lifting force provided by the aeration disc flows into the aerobic zone, then flows into the anoxic zone and the anaerobic zone, and then flows circularly.
In a specific embodiment, the first separation cylinder includes a hollow cylindrical first cylinder body portion, and a first cylinder body extension portion extending from a lower end of the first cylinder body portion toward a central axis direction close to the housing, and the first cylinder body extension portion is in a hollow truncated cone shape.
In a specific embodiment, the second separation cylinder includes a hollow cylindrical second cylinder body portion, and a second cylinder body extension portion extending from a lower end of the second cylinder body portion in a direction away from the central axis of the housing, and the second cylinder body extension portion is in a hollow truncated cone shape.
In a specific embodiment, an end of the second cylinder extension portion away from the second cylinder body portion and an end of the first cylinder body portion close to the first cylinder extension portion are located on the same plane, and a gap for flowing waste water is formed between a bottom end of the second cylinder extension portion and the first cylinder body portion.
In a specific embodiment, the tip of the first barrel body portion remote from the first barrel extension is located above the tip of the second barrel body portion remote from the second barrel extension.
In a specific embodiment, the casing includes a cylindrical casing body portion, a hemispherical casing extension portion extending from one end of the casing body portion, a sludge discharge port formed at the lower end of the casing extension portion, and a water outlet pipe having one end communicated with the anaerobic zone and the other end extending out of the casing body portion, wherein one end of the water outlet pipe extending into the anaerobic zone is slightly lower than a plane where the top end of the first cylinder body portion is located.
In a specific embodiment, the water inlet pipe passes through the shell extension portion and the aeration disc and extends to the position right below the second cylinder extension portion, and the central axis of the water inlet pipe, the central axis of the aeration disc, the central axis of the second separation cylinder, the central axis of the first separation cylinder and the central axis of the shell are all positioned on the same straight line.
In a specific embodiment, the inner and outer zone reactors further comprise a plurality of connecting rods, two ends of which are respectively connected with the inner wall of the shell and the outer wall of the first separation barrel, and a plurality of connecting columns, two ends of which are respectively connected with the inner wall of the first separation barrel and the outer wall of the second separation barrel.
In a specific implementation mode, the reaction tank comprises a tank body with an accommodating space, the three-phase separation assembly comprises an inner cylinder, connecting plates, a guide cylinder and a stirring shaft, wherein the inner cylinder and the tank body are arranged at intervals, the connecting plates are respectively arranged at two ends of the inner cylinder and the tank body, the guide cylinder is positioned in the inner cylinder and is connected with the connecting plates, the stirring shaft of the stirrer penetrates through the guide cylinder and stretches into the tank body, the upper end of the guide cylinder stretches out of a first part of the inner cylinder, the lower end of the guide cylinder extends from the lower end of the first part to a second part which extends in the direction away from the central axis of the first part, the second part is connected with the connecting plates, and a plurality of through holes are formed in the connecting plates.
In a specific embodiment, the anaerobic ceramic membrane bioreactor comprises a reactor shell, a liquid inlet arranged at the lower end of the reactor shell, a liquid outlet arranged at the upper end of the reactor shell, an activated sludge outlet arranged at the lower end of the reactor shell, a ceramic flat membrane contained in the reactor shell, and an aeration component, wherein the activated sludge outlet is communicated with an activated sludge inlet of the reaction tank, and the aeration component is used for enabling the anaerobic ceramic membrane bioreactor to be in an anaerobic state.
The beneficial effects of the invention at least comprise:
1. in the invention, the pig farm wastewater treatment system comprises an air floatation machine, a complete mixing reactor, an anaerobic ceramic membrane bioreactor and an internal and external partition reactor which are communicated in sequence, wherein the air floatation machine is used for removing excrement and impurities of wastewater in a filtering mode to obtain wastewater after primary treatment; the complete mixing reactor is used for completely mixing the anaerobic digestion activated sludge with the wastewater after the primary treatment and then carrying out hydrolysis and acidification reaction to obtain the wastewater after the secondary treatment; the anaerobic ceramic membrane bioreactor enables the anaerobic digestion activated sludge and the wastewater after secondary treatment to undergo methanation reaction so as to obtain wastewater after tertiary treatment, and macromolecule organic matters in the water are trapped through membrane separation; the internal and external partition reactors are used for denitrifying the wastewater after three-stage treatment in two modes of short-cut nitrification-anaerobic ammonia oxidation and short-cut nitrification-denitrification; thus, the complete mixing reactor and the anaerobic ceramic membrane bioreactor remove organic matters in the wastewater through an anaerobic digestion technology, and the internal and external zone reactors are separated through zones to form an aerobic zone, an anoxic zone and an anaerobic zone, so that nitrogen in the wastewater is removed through two modes of short-cut nitrification-anaerobic ammoxidation-short-cut nitrification-denitrification, the removal rate of the organic matters and ammonia nitrogen is over 95%, and the treated wastewater meets the emission standard.
2. The invention provides a complete mixing type reactor which comprises a reaction tank, a stirrer accommodated in the reaction tank and a three-phase separation assembly accommodated in the reaction tank and positioned above a stirring paddle of the stirrer; through setting up three-phase separation subassembly can realize solid-gas-liquid separation, can significantly reduce the mud that gets into in the rear end anaerobic ceramic membrane bioreactor, slow down the membrane pollution by a wide margin.
3. By arranging the ceramic flat membrane in the anaerobic ceramic membrane bioreactor provided by the invention, digested sludge can be intercepted, so that the sludge enters the rear-end internal-external partition reactor to be filtrate, and the usage amount of chemical agents to be added for sludge precipitation is greatly saved; the ceramic flat membrane has the advantages of good pollution resistance, high permeability, good recoverability, good chemical stability, long service life and the like.
4. The invention provides an internal and external partitioned reactor which comprises a shell, a first partition cylinder, a second partition cylinder, an aeration disc and a water inlet pipe, wherein the first partition cylinder is accommodated in the shell and is arranged at intervals with the shell; thus, the arrangement of the reaction chambers of the internal and external partition reactors provides living space for nitrified sludge, denitrified sludge and anaerobic ammonia oxidation sludge, can realize 2 denitrification processes of short-cut nitrification-anaerobic ammonia oxidation and short-cut nitrification-denitrification, and has the advantages of compact structure, small occupied area and good denitrification effect.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of a pig farm wastewater treatment system according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a fully hybrid reactor in the pig farm wastewater treatment system of FIG. 1;
FIG. 3 is an exploded perspective view of the complete mixing reactor of FIG. 2;
FIG. 4 is a schematic view of a partial perspective view of the complete mixing reactor shown in FIG. 2;
FIG. 5 is a schematic perspective view of an internal and external zone reactor in the pig farm wastewater treatment system of FIG. 1;
FIG. 6 is a schematic view of a partial perspective view of the internally and externally partitioned reactor shown in FIG. 5;
FIG. 7 is a schematic diagram of wastewater flow in an internal and external zone reactor in the pig farm wastewater treatment system of FIG. 1.
Reference numerals illustrate:
Detailed Description
The embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be defined and covered in a number of different embodiments according to the claims.
Referring to fig. 1, the present invention provides a pig farm wastewater treatment system 100, which has the advantages of high suspended matter concentration, multiple pollutant types, serious water pollution, compact structure, high treatment efficiency, etc. by adopting the treatment system 100 provided by the present invention to treat pig farm wastewater, the concentration of organic matters and ammonia nitrogen can be greatly reduced, and better water quality can be obtained.
The treatment system provided by the invention removes organic matters in the pig farm wastewater through anaerobic digestion treatment, and removes nitrogen in the pig farm wastewater through two modes of short-cut nitrification-anaerobic ammonia oxidation and short-cut nitrification-denitrification, and phosphorus is precipitated and discharged along with sludge.
Along the flowing direction of the wastewater, the pig farm wastewater treatment system 100 comprises an air floatation machine 10, a complete mixing reactor 20, an anaerobic ceramic membrane bioreactor 30 and an internal and external partition reactor 40 which are sequentially communicated, wherein the air floatation machine 10 is used for removing the excrement and the impurities of the wastewater in a filtering mode to obtain primary treated wastewater; the complete mixing reactor 20 is used for completely mixing anaerobic digestion activated sludge with wastewater after primary treatment and then carrying out hydrolysis and acidification reaction to obtain wastewater after secondary treatment; the anaerobic ceramic membrane bioreactor 30 performs methanation reaction on the anaerobic digestion activated sludge and the wastewater after secondary treatment to obtain wastewater after tertiary treatment, and entraps macromolecular organic matters in the water through membrane separation; the inner and outer zone reactors 40 are used for denitrification of the wastewater after three-stage treatment in two modes of short-cut nitrification-anaerobic ammonia oxidation and short-cut nitrification-denitrification.
The complete mixing reactor 20 mainly performs hydrolysis and acidification reactions, but at the same time, methanation reaction occurs to generate a small amount of biogas.
Referring to fig. 2 to 4, the complete mixing reactor 20 includes a reaction tank 21, a stirrer 22 accommodated in the reaction tank 21, and a three-phase separation assembly 23 installed in the reaction tank 21.
The reaction tank 21 comprises a tank body 211 with an accommodating space, a water inlet 212 formed at the lower end of the tank body 211, a water outlet 213 formed at the upper end of the tank body 211, and an activated sludge inlet 214 formed at the lower end of the tank body 211.
In this embodiment, the tank 211 is a cylindrical tank, and the water inlet 212 and the water outlet 213 are provided on the side wall of the tank 211 and are opposite to each other; the activated sludge inlet 214 is formed on the lower bottom surface of the tank 211.
In this embodiment, the water inlet 212 is communicated with the liquid outlet of the air floatation machine 10, the water outlet 213 is communicated with the water inlet of the anaerobic ceramic membrane bioreactor 30, and the activated sludge inlet 214 is communicated with the activated sludge outlet of the anaerobic ceramic membrane bioreactor 30.
The wastewater after the primary treatment obtained by the solid-liquid separation of the air flotation machine 10 flows into the complete mixing reactor 20 through the water inlet 212, anaerobic digestion activated sludge is inoculated in the tank 211, the anaerobic digestion activated sludge and the wastewater are completely mixed through the stirrer 22, and a sufficient anaerobic digestion reaction is carried out to remove a large amount of organic matters in the wastewater and generate methane and hydrogen; when the sludge concentration of the anaerobic digestion activated sludge in the tank 211 is lower than 15g/L, the activated sludge in the anaerobic ceramic membrane bioreactor 30 is pumped by automatically starting a sludge supply pump to supplement.
It will be appreciated that the tank 211 is further provided with a gas outlet, which is in communication with a water sealed bottle, to ensure that no air is introduced into the fully-mixed reactor 20.
The stirrer 22 is installed in the tank 211, and includes a stirring shaft 221, a stirring paddle 222 installed at the lower end of the stirring shaft 221, and a driving motor for driving the stirring shaft 221.
In this embodiment, the stirring shaft 221 is located at a position where the central axis of the tank 211 is located.
In this embodiment, the stirring paddle 222 includes a plurality of sets of paddles, and a distance between a set of paddles located at the lowest end and the lower bottom surface of the tank 211 is 1/5 of the height of the tank, and a distance between a set of paddles located at the lowest end and the lower bottom surface of the tank 211 is 3/5 of the height of the tank.
The three-phase separation assembly 23 is located above the paddles 222 of the stirrer 22.
The three-phase separation assembly 23 comprises an inner cylinder 231 arranged at intervals with the tank body 211, a connecting plate 232 with two ends respectively connected with the inner cylinder 231 and the tank body 211, a guide cylinder 233 positioned in the inner cylinder 231 and connected with the connecting plate 232, and a plurality of upright posts 234 for connecting the connecting plate 232 and the guide cylinder 233.
Preferably, the central axis of the tank 211, the central axis of the inner cylinder 231, and the central axis of the guide cylinder 233 are located on the same straight line.
In this embodiment, the inner cylinder 231 has a hollow cylindrical shape.
In this embodiment, the water outlet 213 is slightly lower than the top end of the inner cylinder 231.
In this embodiment, the connection plate 232 has a circular ring structure, and a plurality of through holes 2321 are formed in the connection plate 232.
Preferably, the through hole 2321 is a circular through hole, and its aperture is less than 3mm.
In other embodiments, the through holes 2321 may be through holes with other shapes, but the equivalent pore diameters are smaller than 3mm.
Preferably, the plurality of through holes 2321 are uniformly distributed according to a certain rule.
In this embodiment, an end of the guide cylinder 233 facing the water inlet 212 is horn-shaped, specifically, the guide cylinder 233 includes a first portion 2331 with an upper end extending out of the inner cylinder 231, and a second portion 2332 extending from a lower end of the first portion 2331 in a direction away from a central axis of the first portion 2331, and the second portion 2332 is connected to the connecting plate 232.
In this embodiment, the first portion 2331 is hollow cylindrical, the second portion 2332 is hollow truncated cone, and the caliber of the top end of the second portion 2332 is smaller than that of the bottom end.
The top end of the second portion 2332 is an end connected to the first portion 2331, and the bottom end of the second portion 2332 is an end of the second portion 2332 away from the first portion 2331.
Preferably, the second portion 2332 extends out of the inner barrel 231, and the upright 234 is connected at one end to an end of the second portion 2332 remote from the first portion 2331 and at the other end to the connection plate 232.
Preferably, the guide cylinder 233 and the stirring paddle 222 are arranged at intervals, and the distance between the guide cylinder 233 and the stirring paddle is 3/20-1/4 of the height of the tank 211.
More preferably, the height of the guide cylinder 233 is equal to or less than 1/4 of the height of the tank 211, and in particular, the height of the guide cylinder 233 may be 1/4 of the height of the tank 211, or may be 1/5 of the height of the tank 211, etc.
Preferably, a plurality of the posts 234 are evenly distributed.
In this embodiment, the number of the columns 234 is 6 to 8.
In this embodiment, the guide cylinder 233 is designed to be horn-shaped, so that the gas generated by the reaction at the lower part of the tank 211 drives the sludge in the tank 211 to float upwards, the guide cylinder 233 can separate the impurities floating upwards, the gas can flow out from the upper surface of the guide cylinder 233, the separation between the guide cylinder 233 and the inner cylinder 231 can realize solid-liquid-gas separation, the through holes 2321 on the connecting plate 232 can ensure that the internal and external air pressure difference is not too large, and meanwhile, overflowed sludge can be settled down to fall back to the bottom of the tank 211 after the gas is discharged.
The invention improves the reactor by adding the three-phase separation assembly, can realize mud-water separation, can also intercept food residues which are difficult to hydrolyze in the tank body, greatly reduces sludge and impurities entering the rear anaerobic ceramic membrane bioreactor 30, and greatly slows down membrane pollution. The main components of food residues in the waste water are cellulose and hemicellulose polysaccharide organic matters, the hydrolysis period is long (about 30 d), if the food residues are not trapped, irreversible pollution is caused to the membrane in the anaerobic ceramic membrane bioreactor 30, and the service life of the anaerobic ceramic membrane bioreactor 30 is reduced.
The anaerobic ceramic membrane bioreactor 30 is used for fermenting the wastewater after the secondary treatment to generate methane, so that the complete mixing reactor 20 and the anaerobic ceramic membrane bioreactor 30 structurally form front-end hydrolysis acidification and middle-end fermentation, and the reaction efficiency is greatly improved.
The anaerobic ceramic membrane bioreactor 30 comprises a reactor shell 31, a liquid inlet 32 arranged at the lower end of the reactor shell 31, a liquid outlet 33 arranged at the upper end of the reactor shell 31, an activated sludge outlet 34 arranged at the lower end of the reactor shell, a ceramic flat membrane 35 accommodated in the reactor shell 31, and an aeration assembly 36, wherein the aeration assembly 36 is used for enabling the anaerobic ceramic membrane bioreactor 30 to be in an anaerobic state.
The inoculated sludge in the anaerobic ceramic membrane bioreactor 30 is anaerobic digestion activated sludge, specifically middle-upper sludge after impurities are removed by rinsing with clear water, the concentration of the inoculated anaerobic digestion activated sludge is controlled to be 10g/L, and the inoculated sludge is directly discharged after the concentration of the anaerobic digestion activated sludge reaches 50g/L after long-term continuous operation.
In this embodiment, the reactor housing 31 is a cylindrical housing, the liquid inlet 32 is formed on a side wall of the reactor housing 31 and is communicated with the water outlet 213 of the completely mixed reactor 20, and the wastewater treated by the completely mixed reactor flows into the reactor housing 31 through the liquid inlet 32; the liquid outlet 33 is arranged on the upper bottom surface of the reactor shell 31 and is communicated with the filtrate outlet of the ceramic flat membrane 35; the activated sludge outlet 34 is disposed on the bottom surface of the reactor housing 31 and is in communication with the activated sludge inlet of the completely mixed reactor 20.
When the sludge concentration in the complete mixing reactor 20 is lower than 15g/L, the activated sludge in the anaerobic ceramic membrane bioreactor 30 is automatically started and pumped into the complete mixing reactor 20.
The ceramic flat membrane 35 is immersed in the wastewater, and the water quality of the effluent is greatly enhanced through the filtering effect of the membrane, so that anaerobic digestion activated sludge flowing in from the front end is intercepted, and the anaerobic digestion activated sludge enters the inner and outer partition reactors 40 at the rear end and is filtrate, so that the usage amount of chemical agents to be added for sludge precipitation is greatly saved.
The ceramic flat membrane 35 is applied to pig farm wastewater treatment, and the service life of the membrane is greatly prolonged by virtue of the advantages of good pollution resistance, high permeability, good recoverability, good chemical stability, long service life and the like of the ceramic flat membrane.
The aeration assembly 36 comprises a plurality of strip aeration pipes 361, a biogas inlet 362 arranged on the lower bottom surface of the reactor shell 31, a biogas outlet 363 arranged on the upper bottom surface of the reactor shell 31, and an air pump with an air inlet end communicated with the biogas outlet 363 and an air outlet end communicated with the biogas inlet 362, wherein biogas pumped by the air pump is introduced into the plurality of strip aeration pipes 361.
In this embodiment, a plurality of strip-shaped aeration pipes 361 are located below the ceramic flat plate film 35.
The wastewater and the anaerobic digested activated sludge react anaerobically to generate biogas, the biogas is extracted from the upper part of the reactor housing 31 by an air pump, and is introduced into a plurality of strip-shaped aeration pipes 361 to impact the surface of the ceramic flat membrane 35.
Referring to fig. 5 to 7, the internal and external zone reactor 40 includes a housing 41, a first partition cylinder 42 accommodated in the housing 41 and spaced apart from the housing 41, a second partition cylinder 43 accommodated in the first partition cylinder 42 and spaced apart from the first partition cylinder 42, a plurality of connecting rods 44 having one end connected to the housing 41 and the other end connected to the first partition cylinder 42, a plurality of connecting columns 45 having one end connected to the first partition cylinder 42 and the other end connected to the second partition cylinder 43, and an aeration disc 46 installed in the housing 41 and located right below the second partition cylinder 43, wherein the aeration disc 46 is used for providing oxygen to make the space in the second partition cylinder 43 form an aerobic zone.
The housing 41 includes a cylindrical housing body 411, a hemispherical housing extension 412 extending from one end of the housing body 411, a water inlet pipe 413 having one end communicating with the liquid outlet 33 of the anaerobic ceramic membrane bioreactor 30 and the other end extending through the bottom end of the housing extension 412 and extending out of the aeration disc 46, a sludge outlet 414 provided at the lower end of the housing extension 412, and a water outlet pipe 415 having one end communicating with the anaerobic zone and the other end extending out of the housing body 411.
The shell main body 411 and the shell extension 412 together enclose the reaction scheme of the inner and outer zone reactor 40; the water inlet pipe 413 extends out of the aeration disc 46 so that the incoming wastewater can first go into the second separation cylinder under the action of the lifting force provided by the aeration disc 46; the sludge discharge port 414 is used for discharging the sediment of the calcium magnesium phosphate deposited at the bottom; the water discharged through the water outlet pipe 415 is water meeting the discharge standard, and can be directly discharged or used for other purposes.
The first partition cylinder 42 includes a first cylinder body 421 having a hollow cylindrical shape, and a first cylinder extension 422 extending from a lower end of the first cylinder body 421 in a direction toward a central axis of the housing 41; the first cylinder extension 422 is hollow and truncated cone-shaped, and the top caliber of the first cylinder extension 422 is larger than the bottom caliber.
The second partition cylinder 43 includes a second cylinder body 431 having a hollow cylindrical shape, and a second cylinder extension 432 extending from a lower end of the second cylinder body 431 in a direction away from the central axis of the housing 41; the second cylinder extension 432 is hollow and truncated cone, and the diameter of the top end of the second cylinder extension 432 is smaller than that of the bottom end.
In this embodiment, an end of the second cylinder extension 432 away from the second cylinder body 431 is on the same plane as an end of the first cylinder body 421 near the first cylinder extension 422, and a gap for flowing waste water is provided between a bottom end of the second cylinder extension 432 and the first cylinder body 421.
In this embodiment, the top end of the first cylinder body 421 is higher than the top end of the second cylinder body 431, and the end of the water outlet pipe 415 extending into the anaerobic zone is slightly lower than the top end of the first cylinder body 421.
The first separation cylinder 42 is sandwiched between the second separation cylinder 43 and the casing 41, and the three separate the space in the casing 41 into an aerobic zone 40A, an anoxic zone 40B and an anaerobic zone 40C, wherein the space enclosed by the second separation cylinder 43 is the aerobic zone 40A, the area between the second separation cylinder 43 and the first separation cylinder 42 is the anoxic zone 40B, the area between the first separation cylinder 42 and the casing 41 is the anaerobic zone 40C, the wastewater flowing in through the water inlet pipe 413 directly enters the aerobic zone 40A under the action of the rising force provided by the air exposed by the aeration disc 46, then flows out from the top end of the second separation cylinder 43 into the anoxic zone 40B or the anaerobic zone 40C, the water in the anoxic zone flows into the aerobic zone or the anaerobic zone 40C again, the water in the anaerobic zone flows into the aerobic zone or directly flows out, and the wastewater undergoes the shortcut nitrification-anaerobic ammonia oxidation-denitrification-2 denitrification processes in the internal and external zone reactors.
Preferably, the dissolved oxygen concentration of the aerobic zone is controlled to be 0.3-1.0 mg/L.
In the case of wastewater treatment, the inner and outer zone reactors 40 are inoculated with nitrified sludge and anaerobic ammonium oxidation sludge, and in this embodiment, the total concentration of the nitrified sludge and anaerobic ammonium oxidation sludge is 8g/L, and after long-term continuous operation, calcium magnesium phosphate precipitate precipitated at the bottom is discharged through the sludge discharge port 414.
Preferably, the nitrified sludge and anaerobic ammonium oxidation sludge inoculated by the inner and outer partition reactors 40 are crushed by a wall breaking machine, and then are subjected to washing by clean water to remove calcified substances, and then the upper sludge is taken for inoculation.
In the present embodiment, the plurality of connection rods 44 include a plurality of first connection rods 441 having one end connected to the lower end of the first cylinder extension 422 and the other end connected to the bottom of the housing extension 412, and a plurality of second connection rods 442 having one end connected to the inner wall of the housing main body 411 and the other end connected to the outer wall of the first cylinder main body 421, and the first partition cylinder 42 is fixed by the plurality of first connection rods 441 and the plurality of second connection rods 442.
In this embodiment, the number of the first connecting rods 441 is 6 to 8, and the first connecting rods 441 are uniformly spaced.
In this embodiment, the number of the second connecting rods 442 is 4, and they are uniformly spaced.
In this embodiment, one end of the plurality of connection posts 45 is connected to the inner wall of the first cylinder body 421, and the other end is connected to the outer wall of the second cylinder body 431, and the number of the connection posts 45 is 6 to 8, and the connection posts are uniformly spaced. The second partition cylinder 43 is fixed by a plurality of the connecting posts 45.
In this embodiment, the aeration disc 46 is mounted to the housing extension 412 by a bracket, and the gas introduced into the aeration disc 46 is air or oxygen.
Preferably, the diameter of the aeration disc 46 is smaller than or equal to the caliber of the lower end of the second partition cylinder 43.
Preferably, the central axis of the water inlet pipe 413, the central axis of the aeration disc 46, the central axis of the second separation cylinder 43, the central axis of the first separation cylinder 42, and the central axis of the housing 41 are all on the same straight line.
In the invention, the primary treatment wastewater which is filtered by the air floatation machine 10 and is used for removing the excrement and the impurities enters the tank body 211 from the water inlet 212 of the complete mixing reactor, is fully mixed with the anaerobic digestion activated sludge in the tank body 211 to generate hydrolysis reaction and acidification reaction, so as to obtain secondary treatment wastewater, and the solid-liquid-gas full separation is realized through the three-phase separation assembly 23, wherein the gas is directly discharged from the upper part of the tank body 211, the sludge falls back to the bottom of the tank body 211, and the liquid flows out through the water outlet 213 and is conveyed to the anaerobic ceramic membrane bioreactor 30; in the anaerobic ceramic membrane bioreactor 30, the secondary treatment wastewater undergoes methanation reaction to obtain tertiary treatment wastewater by an anaerobic digestion technology, and meanwhile, anaerobic digestion activated sludge is trapped in the reactor by a ceramic flat membrane 35, only filtrate (wastewater) flows out through the liquid outlet and is conveyed to an internal and external partition reactor 40, the internal and external partition reactor 40 divides the reaction chamber into an aerobic zone 40A, an anoxic zone 40B and an anaerobic zone 40C by a first partition cylinder 42 and a second partition cylinder 43, the rising force is increased by an aeration disc, water flowing in through a water inlet pipe firstly directly enters the aerobic zone 40A, then flows into the anoxic zone 40B and the anaerobic zone 40C, and the wastewater circularly flows in the aerobic zone 40A, the anoxic zone 40B and the anaerobic zone 40C, so that the tertiary treatment wastewater generates a nitrogen removal process of short-cut nitrification-anaerobic ammonia oxidation and short-denitrification 2 in the internal and external partition reactor, and the purified water meeting the discharge standard is obtained.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments, and is not intended to limit the practice of the invention to such description. It will be apparent to those skilled in the art that several simple deductions and substitutions can be made without departing from the spirit of the invention, and these are considered to be within the scope of the invention.
Claims (10)
1. A pig farm wastewater treatment system, comprising:
the air floatation machine is used for removing excrement and impurities in the wastewater in a filtering mode to obtain wastewater after primary treatment;
the water inlet of the complete mixing reactor is communicated with the wastewater outlet of the air flotation machine, organic matters in the wastewater after primary treatment are subjected to hydrolysis and acidification reaction through an anaerobic digestion technology to obtain wastewater after secondary treatment, and the complete mixing reactor comprises a reaction tank communicated with the water outlet of the air flotation machine, a stirrer contained in the reaction tank and a three-phase separation assembly contained in the reaction tank and positioned above a stirring paddle of the stirrer;
the liquid inlet of the anaerobic ceramic membrane bioreactor is communicated with the water outlet of the completely mixed reactor, and the wastewater after the secondary treatment is subjected to methanation reaction by an anaerobic digestion technology to obtain wastewater after the tertiary treatment;
the internal and external partition reactor is used for performing denitrification treatment on wastewater after three-stage treatment and comprises a shell, a first partition cylinder, a second partition cylinder, an aeration disc and a water inlet pipe, wherein the first partition cylinder is contained in the shell and is arranged with the shell at intervals, the second partition cylinder is contained in the first partition cylinder and is arranged with the first partition cylinder at intervals, the aeration disc is installed in the shell and is positioned right below the second partition cylinder, one end of the aeration disc is communicated with a liquid outlet of the anaerobic ceramic membrane bioreactor, the other end of the aeration disc extends out of the aeration disc to the position below the second partition cylinder, the aeration disc is used for providing oxygen so that an aerobic zone is formed in a space in the second partition cylinder, an anoxic zone is formed in a zone between the second partition cylinder and the first partition cylinder, and an anaerobic zone is formed in a zone between the first partition cylinder, and wastewater flowing in through the water inlet pipe under the action of lifting force provided by the aeration disc flows into the aerobic zone, then flows into the anoxic zone and the anaerobic zone, and then flows circularly.
2. The pig farm wastewater treatment system according to claim 1, wherein the first partition tube comprises a hollow cylindrical first tube body portion and a first tube body extension portion extending from a lower end of the first tube body portion in a direction close to a central axis of the housing, and the first tube body extension portion is in a hollow truncated cone shape.
3. The pig farm wastewater treatment system according to claim 2, wherein the second partition tube comprises a hollow cylindrical second tube body portion and a second tube body extension portion extending from a lower end of the second tube body portion in a direction away from a central axis of the housing, and the second tube body extension portion is in a hollow truncated cone shape.
4. A pig farm wastewater treatment system according to claim 3, wherein an end of the second barrel extension remote from the second barrel body is co-planar with an end of the first barrel body proximate to the first barrel extension, and wherein a gap is provided between a bottom end of the second barrel extension and the first barrel body for wastewater communication.
5. A pig farm wastewater treatment system according to claim 3, wherein the top end of the first barrel body portion remote from the first barrel extension is located above the top end of the second barrel body portion remote from the second barrel extension.
6. The piggery wastewater treatment system of any one of claims 3 to 5, wherein the housing comprises a cylindrical housing body portion, a hemispherical housing extension extending from one end of the housing body portion, a sludge discharge opening formed at a lower end of the housing extension, and a water outlet pipe having one end in communication with the anaerobic zone and the other end extending out of the housing body portion, the water outlet pipe extending into the anaerobic zone at an end slightly below the plane of the top end of the first barrel body portion.
7. The pig farm wastewater treatment system of claim 6, wherein the water inlet pipe extends through the housing extension and the aeration disc to directly below the second barrel extension, and wherein the central axis of the water inlet pipe, the central axis of the aeration disc, the central axis of the second divider, the central axis of the first divider, and the central axis of the housing are all on a common straight line.
8. The pig farm wastewater treatment system of claim 1, wherein the inner and outer zone reactors further comprise a plurality of connecting rods having both ends connected to the inner wall of the housing and the outer wall of the first separation barrel, respectively, and a plurality of connecting columns having both ends connected to the inner wall of the first separation barrel and the outer wall of the second separation barrel, respectively.
9. The pig farm wastewater treatment system according to claim 1, wherein the reaction tank comprises a tank body with an accommodating space, the three-phase separation assembly comprises an inner cylinder arranged at intervals with the tank body, a connecting plate with two ends respectively connected with the inner cylinder and the tank body, and a guide cylinder positioned in the inner cylinder and connected with the connecting plate, the inner cylinder and the guide cylinder are of hollow structures, a stirring shaft of the stirrer penetrates through the guide cylinder and stretches into the tank body, wherein the guide cylinder comprises a first part with an upper end extending out of the inner cylinder, and a second part extending from a lower end of the first part to a direction away from a central axis of the first part, the second part is connected with the connecting plate, and a plurality of through holes are formed in the connecting plate.
10. The pig farm wastewater treatment system of claim 1, wherein the anaerobic ceramic membrane bioreactor comprises a reactor housing, a liquid inlet arranged at the lower end of the reactor housing, a liquid outlet arranged at the upper end of the reactor housing, an activated sludge outlet arranged at the lower end of the reactor housing, a ceramic flat membrane contained in the reactor housing, and an aeration assembly, wherein the activated sludge outlet is communicated with an activated sludge inlet of the reaction tank, and the aeration assembly is used for enabling the anaerobic ceramic membrane bioreactor to be in an anaerobic state.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1626460A (en) * | 2003-12-09 | 2005-06-15 | 中国科学院成都生物研究所 | Bioreactor for treating wastewater |
| WO2009151190A1 (en) * | 2008-06-12 | 2009-12-17 | Hyung Jong Kim | Combined organic sewage disposal installation using effective microorganism |
| CN101759323A (en) * | 2009-12-24 | 2010-06-30 | 江西省科学院能源研究所 | Treatment combined process for pig farm waste water with high nitrogen content |
| WO2013005913A1 (en) * | 2011-07-05 | 2013-01-10 | 대웅이엔에스 (주) | Composite microorganism reactor, and apparatus and method for water treatment using same |
| CN208916910U (en) * | 2018-07-20 | 2019-05-31 | 深圳清华大学研究院 | A kind of vertical multistage internal circulating anaerobic Anoxic/Aerobic integrated biological reactor |
| CN110217887A (en) * | 2019-05-07 | 2019-09-10 | 华南理工大学 | A kind of the substep water inlet sequencing batch reactor and method of processing waste water of livestock poultry anaerobic digestion solution |
| CN217148724U (en) * | 2022-04-29 | 2022-08-09 | 郑州恒博环境科技股份有限公司 | Sewage treatment integrated biological nitrogen and phosphorus removal device |
-
2023
- 2023-08-14 CN CN202311016821.XA patent/CN116803930B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1626460A (en) * | 2003-12-09 | 2005-06-15 | 中国科学院成都生物研究所 | Bioreactor for treating wastewater |
| WO2009151190A1 (en) * | 2008-06-12 | 2009-12-17 | Hyung Jong Kim | Combined organic sewage disposal installation using effective microorganism |
| CN101759323A (en) * | 2009-12-24 | 2010-06-30 | 江西省科学院能源研究所 | Treatment combined process for pig farm waste water with high nitrogen content |
| WO2013005913A1 (en) * | 2011-07-05 | 2013-01-10 | 대웅이엔에스 (주) | Composite microorganism reactor, and apparatus and method for water treatment using same |
| CN208916910U (en) * | 2018-07-20 | 2019-05-31 | 深圳清华大学研究院 | A kind of vertical multistage internal circulating anaerobic Anoxic/Aerobic integrated biological reactor |
| CN110217887A (en) * | 2019-05-07 | 2019-09-10 | 华南理工大学 | A kind of the substep water inlet sequencing batch reactor and method of processing waste water of livestock poultry anaerobic digestion solution |
| CN217148724U (en) * | 2022-04-29 | 2022-08-09 | 郑州恒博环境科技股份有限公司 | Sewage treatment integrated biological nitrogen and phosphorus removal device |
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