CN111792745A - Landfill leachate treatment system - Google Patents
Landfill leachate treatment system Download PDFInfo
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- CN111792745A CN111792745A CN202010688019.5A CN202010688019A CN111792745A CN 111792745 A CN111792745 A CN 111792745A CN 202010688019 A CN202010688019 A CN 202010688019A CN 111792745 A CN111792745 A CN 111792745A
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- water
- landfill leachate
- treatment system
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- ammonia nitrogen
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 42
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000004062 sedimentation Methods 0.000 claims abstract description 38
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000005188 flotation Methods 0.000 claims abstract description 14
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 13
- 238000007872 degassing Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims description 55
- 238000001223 reverse osmosis Methods 0.000 claims description 37
- XDBZPHDFHYZHNG-UHFFFAOYSA-L disodium 3-[(5-chloro-2-phenoxyphenyl)diazenyl]-4-hydroxy-5-[(4-methylphenyl)sulfonylamino]naphthalene-2,7-disulfonate Chemical compound [Na+].[Na+].C1=CC(C)=CC=C1S(=O)(=O)NC(C1=C2O)=CC(S([O-])(=O)=O)=CC1=CC(S([O-])(=O)=O)=C2N=NC1=CC(Cl)=CC=C1OC1=CC=CC=C1 XDBZPHDFHYZHNG-UHFFFAOYSA-L 0.000 claims description 32
- 238000000108 ultra-filtration Methods 0.000 claims description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 17
- 229910052698 phosphorus Inorganic materials 0.000 claims description 17
- 239000011574 phosphorus Substances 0.000 claims description 17
- 239000010865 sewage Substances 0.000 claims description 13
- 239000006228 supernatant Substances 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 21
- 239000012535 impurity Substances 0.000 abstract description 15
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- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 239000008213 purified water Substances 0.000 abstract description 3
- 229910021529 ammonia Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000000746 purification Methods 0.000 description 4
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- 150000003839 salts Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
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- 239000004743 Polypropylene Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
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- 230000003311 flocculating effect Effects 0.000 description 2
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
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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
-
- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a landfill leachate treatment system, which comprises a garbage storage area, a liquid collecting tank, a first sedimentation tank, an air floatation machine, a second sedimentation tank, a filtering device, an ammonia nitrogen stripping tower, a degassing tower and a clean water tank which are sequentially arranged. The invention utilizes the air flotation machine to remove suspended impurities in the landfill leachate, then removes fine impurities in the water body through the filtering device, removes ammonia gas in the water body through the ammonia nitrogen stripping tower, and finally removes carbon dioxide in the water body through the degassing tower to finally obtain purified water with good water quality.
Description
Technical Field
The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate treatment system.
Background
With the increase of urban population, the enlargement of urban scale and the improvement of the living standard of residents in China, the yield of urban domestic garbage in China is increased sharply. Landfill leachate is a high-concentration organic wastewater that is difficult to treat, and mainly comes from the following three aspects: 1. natural rainfall and runoff in the landfill; 2. the water contained in the waste itself; 3. water produced by anaerobic decomposition of microorganisms after landfills. With precipitation in the landfill being the major component.
The landfill leachate has the characteristics of complex water quality, heavy metal content, poor biodegradability and the like. In the prior art, the landfill leachate is generally discharged to an urban sewage plant for combined treatment, and the method has the advantages that no additional treatment plant is required to be built, and the defects are mainly 2: one is that the investment cost of the pipe network is large, and the landfill site is generally far away from the urban area, so a longer conveying pipe network needs to be laid; and the other is that the unstable factor of the municipal sewage plant is increased, and because the quality of the percolate is complex and unstable, the percolate received by the municipal sewage plant for a long time brings great hidden trouble to the stable operation of the municipal sewage plant, so that the activated sludge is easy to have toxic and other adverse symptoms.
Therefore, the prior art has at least the following technical problems:
because the landfill leachate is discharged to a sewage plant for combined treatment in the prior art, the investment cost is high, and meanwhile, the normal operation of the sewage plant is influenced.
Disclosure of Invention
The invention aims to provide a landfill leachate treatment system, which aims to solve the technical problems that in the prior art, landfill leachate is discharged and put into a sewage plant for combined treatment, the investment cost is high, and meanwhile, the normal operation of the sewage plant is influenced.
Therefore, the technical scheme adopted by the invention for solving the technical problems is as follows: landfill leachate processing system deposits district, collecting tank, first sedimentation tank, air supporting machine, second sedimentation tank, filter equipment, ammonia nitrogen and blows and takes off tower and degasser and clean water basin including rubbish, wherein: the bottom liquid collecting pipe of the garbage storage area is connected with the liquid collecting pool; the supernatant of the liquid collecting tank is pumped into the first sedimentation tank through a first suction pump; the supernatant of the first sedimentation tank is pumped into a water inlet of the air floatation machine through a second suction pump, and a water outlet of the air floatation machine is connected with the second sedimentation tank; the supernatant of the second sedimentation tank is connected with the water inlet of the filtering device through a third suction pump; and a water outlet of the filtering device is pumped into a top water inlet pipe of the ammonia nitrogen stripping tower through a fourth suction pump, a bottom water drain pipe of the ammonia nitrogen stripping tower is pumped into a water inlet pipe of the degassing tower through a fifth suction pump, and a water outlet of the degassing tower is connected with the clean water tank through a sixth suction pump.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, a plurality of air flotation machines are provided, and a plurality of air flotation machines are connected in series.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, the filtering device comprises an SMBR ultrafiltration membrane and an RO reverse osmosis membrane, a water inlet end of the SMBR ultrafiltration membrane is connected with the second sedimentation tank, a water outlet end of the SMBR ultrafiltration membrane is connected with a water inlet end of the RO reverse osmosis membrane, and a water outlet end of the RO reverse osmosis membrane is connected with the ammonia nitrogen stripping tower.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, the SMBR ultrafiltration membranes are connected in parallel, and the RO reverse osmosis membranes are connected in series.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, a third sedimentation tank is further arranged between the SMBR ultrafiltration membrane and the RO reverse osmosis membrane, the water discharge end of the SMBR ultrafiltration membrane is connected with the third sedimentation tank, and the water inlet end of the RO reverse osmosis membrane is connected below the liquid level of the third sedimentation tank through a seventh suction pump.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, an eighth suction pump is further arranged on the drainage pipeline of the SMBR ultrafiltration membrane.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, the SMBR ultrafiltration membrane, the RO reverse osmosis membrane and the sewage discharge port of the air flotation machine are connected to the liquid collecting tank through pipelines.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, the ammonia nitrogen stripping tower adopts a multi-stage ammonia nitrogen stripping tower.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, the landfill leachate treatment system further comprises a filter pressing device, a feed inlet of the filter pressing device is connected with a slurry pump arranged at the bottom of the liquid collecting tank, and a filtrate outlet is connected with the liquid collecting tank.
In a preferred embodiment of the landfill leachate treatment system provided by the invention, the system further comprises a phosphorus removal device, the phosphorus removal device is arranged between the ammonia nitrogen stripping tower and the filtering device, and the phosphorus removal device comprises a water tank and a dosing device.
Compared with the prior art, the garbage leachate treatment system provided by the invention has the beneficial effects that:
the method comprises the steps of removing suspended impurities in landfill leachate by using an air floatation machine, removing fine impurities in a water body by using a filtering device, removing ammonia gas in the water body by using an ammonia nitrogen stripping tower, and removing carbon dioxide in the water body by using a degassing tower to finally obtain purified water with good water quality;
secondly, the phosphorus removal device can remove phosphorus in the water body by adopting a chemical precipitation phosphorus removal mode;
thirdly, the filter pressing device is arranged to pretreat impurities in the liquid collecting tank, so that the purification load of the system can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic structural diagram of a landfill leachate treatment system provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1, the landfill leachate treatment system of the embodiment includes a landfill storage area 1, a liquid collecting tank 2, a first sedimentation tank 3, an air flotation machine 4, a second sedimentation tank 5, a filtering device, an ammonia nitrogen stripping tower 10, a degassing tower 11, and a clean water tank 12.
The bottom liquid collecting pipe of the garbage storage area 1 is connected with the liquid collecting pool 2, and the garbage storage area1 is used for storing garbage, percolate generated by the garbage is collected by a liquid collecting pipe at the bottom and flows into the liquid collecting pool 2, and generally, the liquid collecting pool 2 is usually larger than 100m3. The supernatant of the liquid collecting tank 2 is pumped into the first sedimentation tank 3 through a first suction pump 001, the first sedimentation tank 3 can be used for sedimentation of garbage penetrating fluid, and heavy impurities are settled at the bottom of the tank, so that the load of subsequent treatment can be reduced. The supernatant of the first sedimentation tank 3 is pumped into the water inlet of the air floatation machine 4 through a second suction pump 002, the water outlet of the air floatation machine 4 is connected with the second sedimentation tank 5, and the second sedimentation tank 5 is used for storing the water body of suspended impurities treated by the air floatation machine 4. The supernatant of the second sedimentation tank 5 is connected with the water inlet of the filtering device through a third suction pump 003, and the filtering device is utilized to filter impurities in the water body, so that the water body is purified. The water outlet of the filtering device is pumped into the water inlet pipe at the top of the ammonia nitrogen stripping tower 10 through a fourth suction pump 004, the water outlet pipe at the bottom of the ammonia nitrogen stripping tower 10 is pumped into the water inlet pipe of the degassing tower 11 through a fifth suction pump 005, the water outlet of the degassing tower 11 is connected with the clean water tank 12 through a sixth suction pump 006, the ammonia nitrogen stripping tower 10 is utilized to remove ammonia nitrogen in the water body, the degassing tower 11 is utilized to remove carbon dioxide in the water body, the finally treated water body is sent into the clean water tank 12 to be stored, and the water in the clean water tank 12 can be used for other purposes according to needs.
The embodiment utilizes air supporting machine 4 detach the suspended impurities in landfill leachate, and the rethread filter equipment gets rid of the tiny impurity in the water, by ammonia nitrogen blows off tower 10, degasification tower 11 and gets rid of ammonia nitrogen and carbon dioxide in the water respectively at last, obtains the good purified water of quality of water, and whole processing system investment cost is low, area is little, the play water quality of water is good, is fit for using widely on a large scale.
The ammonia removal principle of the ammonia nitrogen stripping tower 10 is as follows:
the ammonia nitrogen is mainly ammonium ion (NH) in the water body4+) And free ammonia (NH)3) The states exist, with the equilibrium relationship as follows: NH (NH)3+H2O—NH4++OH-This relationship is influenced by the pH, which is balanced when the pH is highMoving to the left, the proportion of free ammonia increases. At normal temperature, most of ammonia nitrogen exists in an ammonium ion state when the pH value is about 7, and the free ammonia accounts for about 98 percent when the pH value is about 11, and the free ammonia is easy to escape from water, if aeration is carried out, the ammonia can be promoted to escape from the water, so that the ammonia nitrogen in the water body mainly adopts NH under the alkaline condition3In the form of volatile NH in water when air is sufficiently contacted3The ammonia nitrogen in the water body is removed by transferring from liquid phase to gas phase.
The ammonia nitrogen stripping tower is usually operated in a countercurrent mode, and a certain height of filler is filled in the tower to increase the gas-liquid mass transfer area, so that ammonia gas can be desorbed from a water body. The ammonia nitrogen stripping tower is filled with Raschig ring, polypropylene pall ring, polypropylene multi-surface hollow ball, etc. The water is lifted to the top of the packed column and distributed over the entire surface of the packing, and flows downward through the packing in countercurrent to the gas, with the partial pressure of ammonia in the air increasing with the degree of ammonia removal and decreasing with the gas-liquid ratio.
Preferably, the number of the air flotation machines 4 is multiple, and a plurality of the air flotation machines 4 are connected in series, as shown in fig. 1, the number of the air flotation machines 4 is 3, and the 3 air flotation machines 4 are connected end to end in series to realize treatment of a water body with suspended impurities, so as to ensure that the suspended impurities in the water body can be completely removed, and specifically, a proper amount of PAM and PAC reagents need to be added to the air flotation machines during the treatment process.
Preferably, the ammonia nitrogen stripping tower 10 of the embodiment adopts a multi-stage ammonia nitrogen stripping tower, as shown in fig. 1, the embodiment adopts a two-stage ammonia nitrogen stripping tower, and the first-stage ammonia nitrogen stripping tower and the second-stage ammonia nitrogen stripping tower are arranged in series, so that ammonia nitrogen in a water body can be removed as much as possible.
Example two
On the basis of embodiment one, filter equipment of this embodiment includes SMBR milipore filter 6 and RO reverse osmosis membrane 8, SMBR milipore filter 6 intake end is connected second sedimentation tank 5, and the end of intaking is connected RO reverse osmosis membrane 8's the end of intaking, RO reverse osmosis membrane 8's the end of intaking is connected ammonia nitrogen blows off tower 10.
The SMBR ultrafiltration membrane only allows water molecules, beneficial mineral substances and trace elements in water to pass through, and bacteria, colloid, rust, suspended matters, silt, macromolecular organic matters and the like which are much larger than the bacteria in volume can be intercepted by the SMBR ultrafiltration membrane, so that the purification process of the water body is realized; water molecules can pass through the RO reverse osmosis membrane, and impurities such as inorganic salts, heavy metal ions, organic matters, viruses and the like in water cannot pass through the RO reverse osmosis membrane, so that the water body is further purified.
Preferably, as shown in fig. 1, in order to increase the purification efficiency and purification effect of the water body, the SMBR ultrafiltration membranes 6 of the present embodiment are provided in parallel, the RO reverse osmosis membranes 8 are provided in series, and preferably, the filtration precision of the RO reverse osmosis membranes 8 is sequentially increased along the flow direction of the water body.
The RO reverse osmosis membrane adopted in the embodiment has low selling price, the running pressure of the RO reverse osmosis membrane is small and is about 10 kilograms, and even if the RO reverse osmosis membrane is broken, water jetted from the RO reverse osmosis membrane can not cause serious damage to a human body or surrounding objects. The DTRO reverse osmosis membrane has high selling price and running pressure of about 65 kilograms, and after the DTRO reverse osmosis membrane is broken, water jetted from the DTRO reverse osmosis membrane can cause serious damage to a human body or surrounding objects, so the RO reverse osmosis membrane is preferably used as the reverse osmosis membrane in the embodiment.
EXAMPLE III
On the basis of embodiment two, this embodiment still be equipped with third sedimentation tank 7 between SMBR milipore filter 6 and the RO reverse osmosis membrane 8, SMBR milipore filter 6's drainage end is connected third sedimentation tank 7, the sedimentation tank is used for storing the water after the SMBR milipore filter is handled, RO reverse osmosis membrane 8's the end of intaking is connected through seventh suction pump 007 below the liquid level of third sedimentation tank 7, reverse osmosis membrane in water is got in the third sedimentation tank, the design of third sedimentation tank can provide the buffering between SMBR milipore filter and the RO reverse osmosis membrane, solves the different problem of SMBR milipore filter and RO reverse osmosis membrane treatment speed.
Preferably, still be equipped with eighth suction pump 008 on SMBR milipore filter 6's the drainage pipe, the suction filtration of water is realized to the setting of eighth suction pump, has improved SMBR milipore filter's treatment effeciency.
Preferably, the SMBR ultrafiltration membrane 6 is further provided with an air pump 60, and the air pump 60 is connected with an aeration port of the SMBR ultrafiltration membrane 6 and can aerate the inside of the SMBR ultrafiltration membrane, as shown in fig. 1.
Example four
On the basis of the first embodiment, the second embodiment or the third embodiment, the landfill leachate treatment system of the embodiment further includes a filter pressing device 13, a feed inlet of the filter pressing device 13 is connected to a slurry pump arranged at the bottom of the liquid collecting tank 2, a filtrate discharge outlet is connected to the liquid collecting tank 2, impurities in the liquid collecting tank 2 are treated through the filter pressing device 13, the impurities in the liquid collecting tank are removed, and meanwhile, filtrate is discharged into the liquid collecting tank.
Preferably, the filter press device 13 of the present embodiment may be a plate and frame filter press.
EXAMPLE five
Based on any one of the above embodiments, the landfill leachate treatment system of this embodiment further includes a phosphorus removal device 9, the phosphorus removal device 9 is disposed between the ammonia nitrogen stripping tower and the filtering device, the phosphorus removal device 9 includes a water tank 901 and a chemical adding device 902, as shown in fig. 1, a water inlet of the water tank 901 is connected to a water outlet of the filtering device, a water outlet of the water tank is connected to the fourth suction pump 004, the chemical adding device 902 is connected to the water tank 901, and a phosphorus removal agent is added into the water tank to realize phosphorus removal on a water body.
In the embodiment, phosphorus is removed by adopting a chemical precipitation method, so that phosphate ions in water generate insoluble salt to form a flocculating constituent and separate the flocculating constituent from the water, thereby removing phosphorus in the sewage. In the embodiment, a metal salt precipitation method can be selected, and alum and ferric trichloride can be added into the water body to remove phosphorus.
In the above embodiment, the sewage discharge ports of the SMBR ultrafiltration membrane 6, the RO reverse osmosis membrane 8, and the air flotation machine 4 are connected to the liquid collecting tank 2 through pipes, so that the sewage treated by the SMBR ultrafiltration membrane, the RO reverse osmosis membrane, and the air flotation machine flows back into the liquid collecting tank for retreatment.
Further, in order to reduce the secondary pollution caused by the ammonia gas blown off by the ammonia nitrogen entering the atmosphere along with the air, the above embodiment may be provided with an absorption tower at the exhaust port of the ammonia nitrogen blowing-off tower for absorbing the exhausted ammonia gas, so that the air exhausted to the atmosphere is purified gas without pollution.
Further, a liquid level sensor (not shown in the figure) is arranged in the liquid collecting tank of the above embodiment, the liquid level sensor is connected with a controller, and the controller is connected with a power supply of the landfill leachate treatment system. When the liquid level sensor detects that the liquid level in the liquid collecting tank is lower than a set value, the controller cuts off the power supply of the garbage leachate treatment system so as to reduce the standby energy consumption of the equipment; when the liquid level sensor detects that the liquid level in the liquid collecting tank is higher than a set value, the power supply normally supplies power to the landfill leachate treatment system.
The above description is only an embodiment of the invention, and not intended to limit the scope of the invention, and all modifications that can be made by using equivalent structures or equivalent processes in the specification of the invention, or directly or indirectly applied to other related technical fields, are also included in the scope of the invention.
Claims (10)
1. The utility model provides a landfill leachate processing system, includes rubbish storage area, its characterized in that: still include collecting tank, first sedimentation tank, air supporting machine, second sedimentation tank, filter equipment, ammonia nitrogen blow-off tower and degasser and clean water basin, wherein:
the bottom liquid collecting pipe of the garbage storage area is connected with the liquid collecting pool;
the supernatant of the liquid collecting tank is pumped into the first sedimentation tank through a first suction pump;
the supernatant of the first sedimentation tank is pumped into a water inlet of the air floatation machine through a second suction pump, and a water outlet of the air floatation machine is connected with the second sedimentation tank;
the supernatant of the second sedimentation tank is connected with the water inlet of the filtering device through a third suction pump;
and a water outlet of the filtering device is pumped into a top water inlet pipe of the ammonia nitrogen stripping tower through a fourth suction pump, a bottom water drain pipe of the ammonia nitrogen stripping tower is pumped into a water inlet pipe of the degassing tower through a fifth suction pump, and a water outlet of the degassing tower is connected with the clean water tank through a sixth suction pump.
2. The landfill leachate treatment system of claim 1, wherein: the air flotation machine is provided with a plurality of air flotation machines which are connected in series.
3. The landfill leachate treatment system of claim 1, wherein: the filter equipment includes SMBR milipore filter and RO reverse osmosis membrane, the end connection of intaking of SMBR milipore filter the second sedimentation tank, the end connection of outlet water the end of intaking of RO reverse osmosis membrane, the end connection of outlet water of RO reverse osmosis membrane the ammonia nitrogen blows and takes off the tower.
4. The landfill leachate treatment system of claim 3, wherein: SMBR milipore filter is equipped with a plurality of parallelly connected, RO reverse osmosis membrane is equipped with a plurality of series connection.
5. The landfill leachate treatment system of claim 3, wherein: still be equipped with the third sedimentation tank between SMBR milipore filter and the RO reverse osmosis membrane, the drainage end of SMBR milipore filter is connected the third sedimentation tank, the end of intaking of RO reverse osmosis membrane passes through the seventh suction pump and connects below the liquid level of third sedimentation tank.
6. The landfill leachate treatment system of claim 5, wherein: and an eighth suction pump is further arranged on the water drainage pipeline of the SMBR ultrafiltration membrane.
7. The landfill leachate treatment system of claim 3, wherein: and the SMBR ultrafiltration membrane, the RO reverse osmosis membrane and the sewage discharge port of the air floatation machine are connected to the liquid collecting tank through pipelines.
8. The landfill leachate treatment system of claim 1, wherein: the ammonia nitrogen stripping tower adopts a multi-stage ammonia nitrogen stripping tower.
9. The landfill leachate treatment system of any one of claims 1 to 8, wherein: the filter pressing device is characterized by further comprising a filter pressing device, a feed inlet of the filter pressing device is connected with a slurry pump arranged at the bottom of the liquid collecting tank, and a filtrate outlet is connected with the liquid collecting tank.
10. The landfill leachate treatment system of any one of claims 1 to 8, wherein: still include phosphorus removal device, phosphorus removal device locates between ammonia nitrogen stripping tower and the filter equipment, phosphorus removal device includes water tank and charge device.
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| CN201921456341 | 2019-09-03 | ||
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112557601A (en) * | 2020-12-15 | 2021-03-26 | 中科建环有限责任公司 | Smart city environment-friendly system and working method thereof |
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| CN107804929A (en) * | 2017-11-13 | 2018-03-16 | 东北石油大学 | A kind of saliferous industrial sewage process method |
| CN208632227U (en) * | 2018-02-10 | 2019-03-22 | 北京合众清源环境科技有限公司 | A kind of landfill leachate treatment equipment |
| CN209210544U (en) * | 2018-12-10 | 2019-08-06 | 北京合众清源环境科技有限公司 | High ammonia nitrogen, high-sulfur compound garbage percolation liquid treating system |
| CN212450986U (en) * | 2019-09-03 | 2021-02-02 | 中科建环有限责任公司 | Landfill leachate treatment system |
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2020
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| CN107804929A (en) * | 2017-11-13 | 2018-03-16 | 东北石油大学 | A kind of saliferous industrial sewage process method |
| CN208632227U (en) * | 2018-02-10 | 2019-03-22 | 北京合众清源环境科技有限公司 | A kind of landfill leachate treatment equipment |
| CN209210544U (en) * | 2018-12-10 | 2019-08-06 | 北京合众清源环境科技有限公司 | High ammonia nitrogen, high-sulfur compound garbage percolation liquid treating system |
| CN212450986U (en) * | 2019-09-03 | 2021-02-02 | 中科建环有限责任公司 | Landfill leachate treatment system |
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