CN209759276U - Landfill leachate treatment system - Google Patents
Landfill leachate treatment system Download PDFInfo
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- CN209759276U CN209759276U CN201920472818.1U CN201920472818U CN209759276U CN 209759276 U CN209759276 U CN 209759276U CN 201920472818 U CN201920472818 U CN 201920472818U CN 209759276 U CN209759276 U CN 209759276U
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Abstract
The utility model discloses a landfill leachate treatment system, which comprises a materialization pretreatment subsystem, a biochemical treatment subsystem and a membrane method deep treatment subsystem; the physicochemical pretreatment subsystem comprises a percolate collecting tank, a water inlet lifting pump, a bag filter, a coagulant dosing device, a coagulation reaction tank, a flocculant dosing device, a flocculation reaction tank, a settling tank, a sludge pressurizing pump and a filter press; the biochemical treatment subsystem comprises a conditioning tank, a denitrification carbon source dosing device, a biochemical lift pump, a primary anoxic and aerobic biochemical reactor, a secondary anoxic and aerobic biochemical reactor, a primary reflux pump, a secondary reflux pump and a biochemical water outlet tank, and the membrane-process deep treatment subsystem comprises an MBR subsystem, an NF subsystem, an RO subsystem and a DTRO subsystem. The utility model discloses a tertiary system fine treatment back can effectively purify filtration liquid, reaches relevant emission standard, prevents landfill leachate polluted environment.
Description
Technical Field
The utility model belongs to the technical field of domestic waste handles, concretely relates to landfill leachate processing system.
Background
The domestic refuse landfill is mainly carried out in a refuse mixing collection and mixing landfill mode, the refuse has complex composition components, and the refuse leachate is high-concentration organic wastewater which is formed by deducting the saturated water holding capacity of refuse and a soil covering layer from the moisture contained in the refuse landfill, rain, snow and water entering the landfill and other moisture, and passing through the refuse layer and the soil covering layer.
The landfill leachate not only contains oxygen-consuming organic pollutants, but also contains various metals and plant nutrients (ammonia nitrogen and the like); the BOD5 and COD concentration is high and far higher than that of urban sewage; the organic pollutants are various, and include non-chlorinated aromatic compounds such as naphthalene and phenanthrene, chlorinated aromatic compounds, phosphate esters, phthalate esters, phenolic compounds, aniline compounds and the like which are difficult to biodegrade; the landfill leachate contains more than ten metal ions, and the heavy metal ions can inhibit microorganisms; high content of ammonia nitrogen, imbalance of C/N ratio and lack of phosphorus element. Therefore, the landfill leachate causes great pollution to the environment.
Disclosure of Invention
To the above technical problem, the utility model aims at providing a can effective treatment domestic waste landfill filtration liquid, make its landfill filtration liquid processing system who finally reaches relevant emission standard.
Therefore, the utility model discloses the technical scheme who adopts does: a landfill leachate treatment system comprises a materialization pretreatment subsystem, a biochemical treatment subsystem and a membrane method deep treatment subsystem;
The materialization pretreatment subsystem comprises a percolate collecting tank, a water inlet lifting pump, a bag filter, a coagulant adding device, a coagulation reaction tank, a flocculant adding device, a flocculation reaction tank, a settling tank, a sludge pressurizing pump and a filter press, wherein percolate in the percolate collecting tank is pressurized and lifted by the water inlet lifting pump to enter the bag filter, a water outlet of the bag filter is connected with the coagulation reaction tank, a coagulant is added into the coagulation reaction tank through the coagulant adding device, a water outlet of the coagulation reaction tank is connected with the flocculation reaction tank, a flocculant is added into the flocculation reaction tank through the flocculant adding device, a water outlet of the flocculation reaction tank is connected with the settling tank, sludge precipitated in a sludge hopper at the bottom of the settling tank enters the sludge tank and is conveyed to the filter press through the sludge pressurizing pump for filter press dehydration, and filter press water of the filter press is discharged to a trench, conveying the dewatered sludge to a refuse landfill for treatment;
the biochemical treatment subsystem comprises a tempering tank, a denitrification carbon source dosing device, a biochemical lift pump, a primary anoxic-aerobic biochemical reactor, a secondary anoxic-aerobic biochemical reactor, a primary reflux pump, a secondary reflux pump and a biochemical water outlet tank, supernatant in the sedimentation tank enters the tempering tank, percolate after tempering is lifted by the biochemical lift pump under pressure and enters an anoxic section of the primary anoxic-aerobic biochemical reactor, a water outlet of the anoxic section of the primary anoxic-aerobic biochemical reactor is connected with an aerobic section of the primary anoxic-aerobic biochemical reactor, a water outlet part of the aerobic section of the primary anoxic-aerobic biochemical reactor flows back to the anoxic section of the primary anoxic-aerobic biochemical reactor through the reflux pump, the rest of the water outlet part of the anoxic section of the secondary anoxic-aerobic biochemical reactor enters the anoxic section of the secondary anoxic-aerobic biochemical reactor, and a water outlet of the anoxic section of the secondary anoxic-aerobic biochemical reactor is connected with the aerobic section of the secondary anoxic-aerobic biochemical reactor, the effluent part of the aerobic section of the secondary anoxic and aerobic biochemical reactor flows back to the anoxic section of the secondary anoxic and aerobic biochemical reactor through a reflux pump, the rest part of the effluent part enters a biochemical effluent groove, sludge precipitated in the aerobic section of the secondary anoxic and aerobic biochemical reactor is discharged into a sludge tank, and a denitrification carbon source is added into the anoxic section of the primary anoxic and aerobic biochemical reactor and the anoxic section of the secondary anoxic and aerobic biochemical reactor through a denitrification carbon source dosing device;
the membrane advanced treatment subsystem comprises an MBR subsystem, an NF subsystem, an RO subsystem and a DTRO subsystem, wherein percolate of the biochemical water outlet tank is pressurized and conveyed to the MBR subsystem through a membrane system water inlet pump, outlet water of the MBR subsystem enters an MBR clear liquid tank, clear liquid in the MBR clear liquid tank is pressurized and conveyed to the NF subsystem through the NF water inlet pump, biochemical sludge separated by the MBR subsystem flows back to a primary anoxic aerobic biochemical reactor, clear liquid separated by the NF subsystem enters the NF clear liquid tank, clear liquid in the NF clear liquid tank is pressurized and conveyed to the RO subsystem through the RO water inlet pump, concentrated liquid separated by the NF subsystem enters a concentrated liquid tank, a fresh water outlet of the RO subsystem is connected with a fresh water tank, a concentrated water outlet of the RO subsystem is connected with the concentrated liquid tank, outlet water of the concentrated liquid tank is pressurized and conveyed to the DTRO subsystem through the DTRO water inlet pump, a fresh water outlet of the DTRO subsystem is connected with the fresh water tank, and the concentrated water separated by the DTRO subsystem enters a recharge tank and is pressurized and conveyed to a refuse landfill for recharging treatment through a recharge pump.
Preferably, the aerobic section of the first-stage anoxic and aerobic biochemical reactor is oxygenated by a first-stage jet aeration pump, and the aerobic section of the second-stage anoxic and aerobic biochemical reactor is oxygenated by a second-stage jet aeration pump. By adopting the structure, the gas dissolving efficiency is high, the equipment is simple, and the maintenance is easy.
preferably, the water outlet of the fresh water tank is connected with a discharge tank, a sampling pump is arranged in the discharge tank, and the effluent in the discharge tank can be discharged to a sewage treatment plant for subsequent treatment after reaching the standard through detection. By adopting the structure, whether the treated sewage reaches the discharge standard or not can be rapidly detected, and the treatment effect is checked.
Preferably, the water outlet of the discharge pool is connected with a Parshall flow tank, and the measured water is discharged. By adopting the structure, the discharged water yield can be measured, and statistics and management are facilitated.
Preferably, the filter press is a chamber filter press. By adopting the structure, the filter cloth is convenient to replace and easy to maintain.
The utility model has the advantages that: after the garbage leachate is finely treated by a three-level system of a materialization pretreatment subsystem, a biochemical treatment subsystem and a membrane method advanced treatment subsystem, the garbage leachate can be effectively purified, the treated leachate can reach the control standard of domestic garbage landfill GB16889-2008, and the garbage leachate is prevented from polluting the environment.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention will be further described by way of examples with reference to the accompanying drawings:
As shown in fig. 1, a landfill leachate treatment system comprises a materialization pretreatment subsystem, a biochemical treatment subsystem and a membrane method deep treatment subsystem; the materialization pretreatment subsystem consists of a percolate collecting tank 1, a water inlet lifting pump 2, a bag filter 3, a coagulant adding device 14, a coagulation reaction tank 4, a flocculant adding device 15, a flocculation reaction tank 5, a settling tank 6, a sludge tank 7, a sludge pressure pump 8 and a filter press 9; the biochemical treatment subsystem consists of a conditioning tank 10, a denitrification carbon source dosing device 21, a biochemical lift pump 11, a primary anoxic and aerobic biochemical reactor 12, a secondary anoxic and aerobic biochemical reactor 13, a primary reflux pump 17, a secondary reflux pump 19, a primary jet aeration pump 18, a secondary jet aeration pump 20 and a biochemical water outlet tank 16; the membrane deep treatment subsystem consists of a membrane system water inlet pump 22, an MBR subsystem 23, an MBR clear liquid tank 24, an NF water inlet pump 25, an NF subsystem 26, an NF clear liquid tank 27, an RO water inlet pump 28, an RO subsystem 29, a concentrated liquid tank 30, a DTRO water inlet pump 31, a DTRO subsystem 32, a recharge tank 33, a recharge pump 34, a fresh water tank 35, a discharge pond 36 and a Bashall flow tank 37, wherein the MBR subsystem 23 is an external membrane bioreactor system, the NF subsystem 26 is a nanofiltration system, the RO subsystem 29 is a reverse osmosis system, and the DTRO subsystem 32 is a disc tube type reverse osmosis system.
As shown in figure 1, a physicochemical pretreatment subsystem removes large-particle impurities, suspended matters and the like in garbage percolate through filtration, coagulation reaction, flocculation reaction and precipitation, the percolate in a percolate collecting pool 1 is pressurized and lifted by a water inlet lifting pump 2 and enters a bag filter 3, the large-particle impurities in the percolate are intercepted and removed by a fine filter bag in the bag filter 3, the water outlet of the bag filter 3 is connected with a coagulation reaction tank 4, the water outlet of the coagulation reaction tank 4 is connected with a flocculation reaction tank 5, orange drug is added into the coagulation reaction tank 4 through a coagulant adding device 14 to be used as coagulant, the percolate is subjected to coagulation reaction, suspended pollutants in the percolate and the coagulant generate fine alum flocs together, the water outlet of the coagulation reaction tank 4 is connected with the flocculation reaction tank 5, the percolate automatically flows into the flocculation reaction tank 5 after the coagulation reaction, white drug is added into the flocculation reaction tank 5 through a flocculant device 15 to be used as flocculant, the leachate is subjected to flocculation reaction, previous fine alum flocs and a flocculating agent generate large alum flocs together, a water outlet of a flocculation reaction tank 5 is connected with a precipitation tank 6, the leachate after flocculation reaction automatically flows into the precipitation tank 6 to be precipitated, the sludge precipitated in a bottom mud bucket of the precipitation tank 6 enters a sludge pool 7, the sludge in the sludge pool 7 is conveyed to a filter press 9 through a sludge pressure pump 8 to be subjected to filter pressing and dehydration, in the embodiment, the filter press 9 adopts a box-type filter press, the filter pressing water of the filter press 9 is discharged to a trench, the dehydrated sludge is conveyed to a refuse landfill to be treated, the leachate forms supernatant on the upper part of the precipitation tank 6, and the leachate automatically flows into a biochemical treatment system.
As shown in figure 1, the biochemical treatment subsystem removes most of total nitrogen pollutants and ammonia nitrogen pollutants in the percolate through denitrification and nitrification, the supernatant in the precipitation tank 6 enters the tempering tank 10, the percolate after the homogenization, the uniform tempering and the quality adjustment in the tempering tank 10 is pressurized and lifted by a biochemical lifting pump 11 to enter an anoxic section 12a of the first-stage anoxic and aerobic biochemical reactor, a water outlet of the anoxic section 12a of the first-stage anoxic and aerobic biochemical reactor is connected with an aerobic section 12b of the first-stage anoxic and aerobic biochemical reactor, a water outlet part of the aerobic section 12b of the first-stage anoxic and aerobic biochemical reactor flows back to the anoxic section 12a of the first-stage anoxic and aerobic biochemical reactor through a first-stage reflux pump 17, the rest part enters an anoxic section 13a of the second-stage anoxic and aerobic biochemical reactor, and a denitrification carbon source is added into the anoxic section 12a of the first-stage anoxic and aerobic biochemical reactor through a denitrification chemical adding device 21, denitrifying microorganisms are subjected to a denitrifying denitrification reaction to remove most of total nitrogen pollutants in the leachate, oxygen is filled into the aerobic section 12b of the first-stage anoxic and aerobic biochemical reactor through a first-stage jet aeration pump 18 in the aerobic section 12b of the first-stage anoxic and aerobic biochemical reactor, the ammonia nitrogen pollutants in the leachate are subjected to a nitrification reaction under aerobic conditions by the nitrifying microorganisms to remove most of the ammonia nitrogen pollutants, and the effluent of the aerobic section 12b of the first-stage anoxic and aerobic biochemical reactor is refluxed to the water inlet end of the anoxic section 12a of the first-stage anoxic and aerobic biochemical reactor through a first-stage reflux pump 17 to ensure that the denitrifying reaction is normally carried out; the water outlet of the anoxic section 13a of the second-stage anoxic and aerobic biochemical reactor is connected with the aerobic section 13b of the second-stage anoxic and aerobic biochemical reactor, the water outlet part of the aerobic section 13b of the second-stage anoxic and aerobic biochemical reactor returns to the anoxic section 13a of the second-stage anoxic and aerobic biochemical reactor through a second-stage reflux pump 19, the rest part enters a biochemical water outlet groove 16, the sludge precipitated in the aerobic section 13b of the second-stage anoxic and aerobic biochemical reactor is discharged into a sludge tank 7, a denitrification carbon source is added into the anoxic section 13a of the second-stage anoxic and aerobic biochemical reactor through a denitrification carbon source dosing device 21, denitrification reaction is carried out on denitrification microorganisms, total nitrogen pollutants in the percolate are removed again, oxygen is filled into the aerobic section 13b of the second-stage anoxic and aerobic biochemical reactor 13 through a second-stage jet aeration pump 20, nitrifying microorganisms enable ammonia nitrogen pollutants in the percolate to carry out nitration reaction under aerobic condition, remove the ammonia nitrogen pollutants again, and enable the effluent of the aerobic section 13b of the secondary anoxic and aerobic biochemical reactor to flow back to the water inlet end of the anoxic section 13a of the secondary anoxic and aerobic biochemical reactor in large flow through a secondary reflux pump 19, so that normal denitrification reaction is ensured; the effluent of the aerobic section 13b of the second-stage anoxic-aerobic biochemical reactor automatically flows into a biochemical effluent tank 16.
As shown in fig. 1, the membrane advanced treatment subsystem purifies the percolate step by step through multi-layer filtration, and finally reaches the discharge standard, the percolate in the biochemical effluent tank 16 is pressurized and conveyed to an MBR subsystem 23 through a membrane system water inlet pump 22, biochemical sludge in the percolate is separated by the MBR subsystem 23 and flows back to a first-stage anoxic and aerobic biochemical reactor 12, a water outlet of the MBR subsystem 23 is connected with an MBR clear liquid tank 24, the percolate treated by the MBR subsystem 23 is stored in the MBR clear liquid tank 24, the percolate in the MBR clear liquid tank 24 is pressurized and conveyed to an NF subsystem 26 through an NF water inlet pump 25, and pollutants such as macromolecular organic matters in the percolate are effectively removed through the filtration action of the NF subsystem 26, a concentrated water outlet of the NF subsystem 26 is connected with a concentrated liquid tank 30, a fresh water outlet is connected with an NF clear liquid tank 27, the percolate in the NF clear liquid tank 27 is pressurized and conveyed into, in the RO subsystem 29, pollutants such as residual ammonia nitrogen, total phosphorus, small molecular organic matters and the like in leachate are effectively removed, a fresh water outlet of the RO subsystem 29 is connected with a fresh water tank 35, a concentrated water outlet is connected with a concentrated solution tank 30, concentrated solution in the concentrated solution tank 30 is pressurized and conveyed into a DTRO subsystem 32 through a DTRO water inlet pump 31, the concentrated solution is further concentrated and separated into fresh water and concentrated water in the DTRO subsystem 32, the fresh water outlet of the DTRO subsystem 32 is connected with the fresh water tank 35, the concentrated water outlet is connected with a recharge tank 33, the concentrated water in the recharge tank 33 is conveyed to a landfill site for recharging treatment through the recharge pump 34, a water outlet of the fresh water tank 35 is connected with a discharge tank 36, a sampling pump is arranged in the discharge tank 36, the water quality of the water in the discharge tank 36 is sampled and detected through the sampling pump, the water outlet of the discharge tank 36 is connected with a Baschel flow tank 37, so that the discharge amount can be measured, after the water reaches the standard, the water in the discharge pool 36 can be reserved in the Parshall flow tank 37 for metering and discharging.
Claims (5)
1. The utility model provides a landfill leachate processing system which characterized in that: the system comprises a materialization pretreatment subsystem, a biochemical treatment subsystem and a membrane method deep treatment subsystem;
The materialization pretreatment subsystem comprises a percolate collecting tank, a water inlet lifting pump, a bag filter, a coagulant adding device, a coagulation reaction tank, a flocculant adding device, a flocculation reaction tank, a settling tank, a sludge pressurizing pump and a filter press, wherein percolate in the percolate collecting tank is pressurized and lifted by the water inlet lifting pump to enter the bag filter, a water outlet of the bag filter is connected with the coagulation reaction tank, a coagulant is added into the coagulation reaction tank through the coagulant adding device, a water outlet of the coagulation reaction tank is connected with the flocculation reaction tank, a flocculant is added into the flocculation reaction tank through the flocculant adding device, a water outlet of the flocculation reaction tank is connected with the settling tank, sludge precipitated in a sludge hopper at the bottom of the settling tank enters the sludge tank and is conveyed to the filter press through the sludge pressurizing pump for filter press dehydration, and filter press water of the filter press is discharged to a trench, conveying the dewatered sludge to a refuse landfill for treatment;
The biochemical treatment subsystem comprises a tempering tank, a denitrification carbon source dosing device, a biochemical lift pump, a primary anoxic-aerobic biochemical reactor, a secondary anoxic-aerobic biochemical reactor, a primary reflux pump, a secondary reflux pump and a biochemical water outlet tank, supernatant in the sedimentation tank enters the tempering tank, percolate after tempering is lifted by the biochemical lift pump under pressure and enters an anoxic section of the primary anoxic-aerobic biochemical reactor, a water outlet of the anoxic section of the primary anoxic-aerobic biochemical reactor is connected with an aerobic section of the primary anoxic-aerobic biochemical reactor, a water outlet part of the aerobic section of the primary anoxic-aerobic biochemical reactor flows back to the anoxic section of the primary anoxic-aerobic biochemical reactor through the primary reflux pump, the rest of the water outlet part of the anoxic section of the secondary anoxic-aerobic biochemical reactor enters the anoxic section of the secondary anoxic-aerobic biochemical reactor, and a water outlet of the anoxic section of the secondary anoxic-aerobic biochemical reactor is connected with the aerobic section of the secondary anoxic-aerobic biochemical reactor, the effluent part of the aerobic section of the secondary anoxic and aerobic biochemical reactor flows back to the anoxic section of the secondary anoxic and aerobic biochemical reactor through a secondary reflux pump, the rest part of the effluent part enters a biochemical effluent groove, sludge precipitated in the aerobic section of the secondary anoxic and aerobic biochemical reactor is discharged into a sludge tank, and a denitrification carbon source is added into the anoxic section of the primary anoxic and aerobic biochemical reactor and the anoxic section of the secondary anoxic and aerobic biochemical reactor through a denitrification carbon source dosing device;
the membrane advanced treatment subsystem comprises an MBR subsystem, an NF subsystem, an RO subsystem and a DTRO subsystem, wherein percolate of the biochemical water outlet tank is pressurized and conveyed to the MBR subsystem through a membrane system water inlet pump, outlet water of the MBR subsystem enters an MBR clear liquid tank, clear liquid in the MBR clear liquid tank is pressurized and conveyed to the NF subsystem through the NF water inlet pump, biochemical sludge separated by the MBR subsystem flows back to a primary anoxic aerobic biochemical reactor, clear liquid separated by the NF subsystem enters the NF clear liquid tank, clear liquid in the NF clear liquid tank is pressurized and conveyed to the RO subsystem through the RO water inlet pump, concentrated liquid separated by the NF subsystem enters a concentrated liquid tank, a fresh water outlet of the RO subsystem is connected with a fresh water tank, a concentrated water outlet of the RO subsystem is connected with the concentrated liquid tank, outlet water of the concentrated liquid tank is pressurized and conveyed to the DTRO subsystem through the DTRO water inlet pump, a fresh water outlet of the DTRO subsystem is connected with the fresh water tank, and the concentrated water separated by the DTRO subsystem enters a recharge tank and is pressurized and conveyed to a refuse landfill for recharging treatment through a recharge pump.
2. The landfill leachate treatment system of claim 1, wherein: and respectively oxygenating the aerobic section of the first-stage anoxic and aerobic biochemical reactor by a first-stage jet aeration pump, and oxygenating the aerobic section of the second-stage anoxic and aerobic biochemical reactor by a second-stage jet aeration pump.
3. the landfill leachate treatment system of claim 1, wherein: the fresh water tank is characterized in that a water outlet of the fresh water tank is connected with a discharge tank, a sampling pump is arranged in the discharge tank, and effluent in the discharge tank can be discharged to a sewage treatment plant for subsequent treatment after reaching the standard through detection.
4. The landfill leachate treatment system of claim 3, wherein: and a water outlet of the discharge pool is connected with the Parshall flow tank and is discharged after being metered.
5. The landfill leachate treatment system of claim 1, wherein: the filter press is a chamber filter press.
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| CN201920472818.1U CN209759276U (en) | 2019-04-08 | 2019-04-08 | Landfill leachate treatment system |
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| CN201920472818.1U CN209759276U (en) | 2019-04-08 | 2019-04-08 | Landfill leachate treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526797A (en) * | 2021-07-30 | 2021-10-22 | 青岛科技大学 | System, method and application for treating percolate and flushing water of domestic garbage transfer station |
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2019
- 2019-04-08 CN CN201920472818.1U patent/CN209759276U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526797A (en) * | 2021-07-30 | 2021-10-22 | 青岛科技大学 | System, method and application for treating percolate and flushing water of domestic garbage transfer station |
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Effective date of registration: 20201225 Address after: No.26, Jiulongyuan Avenue, Jiulongpo District, Chongqing 400052 Patentee after: Chongqing GANGLONG Environmental Protection Technology Co.,Ltd. Patentee after: CHONGQING GANGLI ENVIRONMENTAL PROTECTION Co.,Ltd. Address before: 400042 1-6, 88 Huju Road, Yuzhong District, Chongqing Patentee before: CHONGQING GANGLI ENVIRONMENTAL PROTECTION Co.,Ltd. |
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