CN210795996U - Integrated integrated equipment for treating landfill leachate MBR effluent based on membrane Fenton oxidation technology - Google Patents
Integrated integrated equipment for treating landfill leachate MBR effluent based on membrane Fenton oxidation technology Download PDFInfo
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- CN210795996U CN210795996U CN201920685567.5U CN201920685567U CN210795996U CN 210795996 U CN210795996 U CN 210795996U CN 201920685567 U CN201920685567 U CN 201920685567U CN 210795996 U CN210795996 U CN 210795996U
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- 239000012528 membrane Substances 0.000 title claims abstract description 113
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 69
- 230000003647 oxidation Effects 0.000 title claims abstract description 67
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000012028 Fenton's reagent Substances 0.000 claims abstract description 37
- 238000001556 precipitation Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000010354 integration Effects 0.000 claims abstract description 6
- 230000020477 pH reduction Effects 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 55
- 239000002253 acid Substances 0.000 claims description 54
- 239000003513 alkali Substances 0.000 claims description 48
- 238000005192 partition Methods 0.000 claims description 43
- 239000010802 sludge Substances 0.000 claims description 27
- 238000004062 sedimentation Methods 0.000 claims description 26
- 229910052742 iron Inorganic materials 0.000 claims description 25
- 238000005273 aeration Methods 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 238000005189 flocculation Methods 0.000 claims description 7
- 230000016615 flocculation Effects 0.000 claims description 7
- 239000012670 alkaline solution Substances 0.000 claims description 6
- 239000000084 colloidal system Substances 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000000108 ultra-filtration Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 14
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
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- 239000000243 solution Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
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- 238000005345 coagulation Methods 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
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- 239000003344 environmental pollutant Substances 0.000 description 3
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- 239000012141 concentrate Substances 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
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- 238000010979 pH adjustment Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
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- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to an integration integrated equipment based on membrane fenton oxidation technology handles landfill leachate MBR goes out water, its whole appearance is the cuboid box, separate into a plurality of reaction zone in the box, include: the system comprises a first-stage acidification zone, a first-stage Fenton reagent dosing zone, a first-stage oxidation zone, a first-stage alkalifying zone, a first-stage flocculant dosing zone, a first-stage precipitation zone, a first-stage membrane zone, a second-stage acidification zone, a second-stage Fenton reagent dosing zone, a second-stage oxidation zone, a second-stage alkalifying zone, a second-stage flocculant dosing zone, a second-stage precipitation zone and a second-stage membrane zone. The integration equipment combines the traditional advanced oxidation-Fenton technology with a membrane process through improvement to form a novel process, and solves the problem that membrane concentration is difficult to process in the traditional 'pretreatment + biochemical treatment + membrane treatment' process. The technology of the patent has a good COD degradation effect, the effluent quality is stable, no membrane concentrated solution is generated, the process equipment is integrated, the operation cost is low, and the technology has a good application prospect.
Description
Technical Field
This patent is applicable to landfill leachate treatment technical field, in particular to integrated equipment based on membrane fenton oxidation technology handles landfill leachate MBR effluent.
Background
The landfill leachate is high-concentration organic wastewater which is complex in composition and difficult to treat, contains high-concentration pollutants such as ammonia nitrogen, various heavy metals and organic matters, also contains some pathogenic microorganisms and carcinogenic and teratogenic substances, and can cause serious pollution to the environment and harm human health if the treatment effect is not ideal. From 7/1 in 2008, China starts to implement a new emission standard, namely the pollution control standard of a domestic garbage landfill (GBl 6889-2008), which is an important measure for environmental protection in China.
In order to meet the discharge standard, the landfill site in China usually adopts a treatment process of pretreatment, biochemical MBR and membrane advanced treatment (NF-RO), the process can better remove particulate matters, nitrogen-containing nutrients, biodegradable organic matters and pathogenic microorganisms in the leachate, and the leachate can meet the requirement of the discharge environment after membrane treatment technologies such as MBR, NF, RO and the like. However, there are some technical problems in the process: (1) the concentration of biodegradable organic matters in the percolate of the old landfill is low, the nutrition proportion is disordered, and a large amount of carbon sources are required to be added, so that the cost is increased; (2) the investment and operation cost of NF, RO and other deep membrane treatment units are high; (3) the NF and RO units are only membrane filtration, and the pure separation of the refractory organics in the percolate can generate concentrated water with high concentration of the refractory organics, which needs to be thoroughly oxidized and removed. At present, nanofiltration concentrated solution flows back to a regulating reservoir and then enters a biochemical system, reverse osmosis concentrated solution is directly recharged to a landfill site, and the accumulation problems of pollutants, salts and the like are caused by simple recharging, so that the whole biochemical system is paralyzed.
Therefore, aiming at the difficult problem that the membrane concentrated solution is difficult to treat due to the membrane advanced treatment, the advanced treatment method based on the Fenton principle is used for degradation and removal, and MBR effluent is developedAn advanced oxidation technology for COD standard discharge replaces NF-RO and other deep membrane treatment processes, shortens the process flow, reduces the investment and the operation cost, and has better application prospect. The main mechanism of fenton reaction is: under acidic conditions, H2O2In the ferrous ion Fe2+Under the catalytic action of (2), a large amount of hydroxyl free radicals (OH) with strong oxidizability are generated, and macromolecular organic matters are decomposed into micromolecular organic matters or mineralized into CO through combination with pollutants2And H2And O. Concurrent generation of Fe3+Has stronger hydrolytic coagulation capability than other iron salts, and Fe can be mixed by adding flocculating agent PAM under alkaline condition3+Removal in the form of a precipitate can remove a portion of the organics. Because the adoption of traditional gravity precipitation needs a long time, and the effluent quality is unstable, and the impact load resistance is poor, consequently adopt submergence formula milipore filter subassembly to strengthen the settling zone among the traditional technology and carry out solid-liquid separation, use the self priming pump to pump out water, realize mud-water separation, and with the membrane area iron mud backward flow to the oxidation zone, improved the iron mud concentration in the processing procedure, when maintaining high-efficient chemical reaction, make full use of the coagulation adsorption of iron mud, further get rid of COD, ensured up to standard emission of COD. And meanwhile, an aeration pipe is laid under the membrane component for aeration, so that iron mud near the membrane component is in a flowing state, and the pollution of the membrane component can be effectively reduced. The membrane area is provided with a sludge discharge system for discharging the precipitated iron sludge. Therefore, the membrane Fenton oxidation technology has the advantages of thorough degradation of organic matters, high reaction rate, stable effluent quality and the like, and has better popularization prospect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integration equipment based on membrane fenton oxidation technology handles landfill leachate MBR goes out water, and it is high to overcome the running cost who exists among the prior art, and difficult scheduling problem is handled to membrane concentrate.
The utility model discloses realize the technical scheme of purpose as follows: the utility model provides an integration integrated equipment based on membrane fenton oxidation technology handles landfill leachate MBR play water, its whole appearance is the cuboid box, separate into a plurality of reaction zone in the box, include: a first-stage acid adding region, a first-stage Fenton reagent adding region, a first-stage oxidation region, a first-stage alkali adding region, a first-stage flocculant adding region, a first-stage precipitation region, a first-stage membrane region, a second-stage acid adding region, a second-stage Fenton reagent adding region, a second-stage oxidation region, a second-stage alkali adding region, a second-stage flocculant adding region, a second-stage precipitation region and a second-stage membrane region;
the effluent of the landfill leachate MBR firstly enters the primary acid adding area, a dosing pump for adding acid liquor is arranged in the primary acid adding area to enable the pH value of the primary acid adding area to be 2-5, and a water outlet of the primary acid adding area is communicated with a primary Fenton reagent dosing area; the water outlet of the primary Fenton reagent feeding area is communicated with a primary oxidation area, and an aeration pipe is laid at the bottom in the primary oxidation area and is provided with a certain amount of aeration;
the water outlet of the primary oxidation zone is communicated with a primary alkali adding zone, and the pH of the water body is 8-12 when alkaline solution is added into the primary alkali adding zone through a dosing pump; the water outlet of the primary alkali adding area is communicated with a primary flocculant adding area; the water outlet of the first-stage dosing region is communicated with the first-stage sedimentation region, and the bottom of the first-stage sedimentation region is provided with a sludge discharge pipe;
the water outlet of the primary sedimentation area is communicated with a primary membrane area, and a membrane assembly is arranged in the primary membrane area and is used for realizing sludge-water separation; the primary membrane area is provided with a sludge discharge system for discharging precipitated iron sludge out of the system;
the primary membrane area pumps water out through a self-priming pump and enters a secondary acid adding area, and the secondary acid adding area is provided with a dosing pump for adding acid liquor so that the pH value of the secondary acid adding area ranges from 2 to 5;
the outlet water of the secondary acidification zone enters a secondary Fenton reagent dosing zone, and a dosing pump is arranged in the secondary Fenton reagent dosing zone;
the water outlet of the secondary Fenton reagent feeding area is communicated with a secondary oxidation area, and an aeration pipe is laid at the bottom in the secondary oxidation area;
a water outlet of the secondary oxidation area is communicated with a secondary alkali adding area, and a chemical adding pump is arranged in the secondary alkali adding area to add an alkaline solution so that the pH value of water in the secondary alkali adding area is 8-12;
the effluent of the secondary alkali adding area enters a secondary flocculant adding area, and a certain amount of flocculant is added into the secondary flocculant adding area to generate colloid flocculation and precipitation;
the effluent of the secondary flocculant adding area enters a secondary sedimentation area, and a sludge discharge pipe is arranged at the bottom of the secondary sedimentation area to discharge iron sludge;
the effluent of the secondary sedimentation zone enters a secondary membrane zone, a membrane component is arranged in the secondary membrane zone and used for realizing mud-water separation, and a sludge discharge system is arranged in the secondary membrane zone and used for discharging the precipitated iron sludge out of the system; the effluent of the secondary membrane area is clear water.
Further, a stirrer is respectively arranged in the primary acid adding area, the primary Fenton reagent adding area, the primary alkali adding area, the primary flocculant adding area, the secondary acid adding area, the secondary Fenton reagent adding area, the secondary alkali adding area and the secondary flocculant adding area.
The first-stage acid adding area, the first-stage oxidation area, the first-stage alkali adding area, the second-stage acid adding area and the second-stage alkali adding area are respectively provided with an online pH meter;
and online ORP meters are respectively arranged in the first-stage oxidation zone and the second-stage oxidation zone.
And aeration pipes are respectively paved under the membrane components of the first membrane area and the second membrane area for aeration.
Preferably, the membrane modules in the primary membrane area and the secondary membrane area are immersed ultrafiltration membrane modules respectively.
Optimally, the MBR effluent integrated equipment for treating the landfill leachate based on the membrane Fenton oxidation technology is characterized in that five vertical partition plates are arranged in the cuboid box body in the length direction, and the five partition plates and the outer wall of the cuboid box body form six box body sections from first to sixth;
in the first box body section, a sixth partition plate is connected between the first partition plate and the left side wall of the cuboid box body, a part of area partitioned by the sixth partition plate forms a primary oxidation area, and the other part of area is partitioned into a primary acid adding area and a primary Fenton reagent adding area by a seventh partition plate;
in the second box body section, an eighth baffle plate is connected between the first baffle plate and the second baffle plate, a part of area partitioned by the eighth baffle plate forms a primary sedimentation area, and the other part of area is partitioned into a primary alkali adding area and a primary flocculant adding area by a ninth baffle plate;
the third box body section is a primary membrane area;
in the fourth box body section, a tenth partition plate is connected between the third partition plate and the fourth partition plate, a part of area partitioned by the tenth partition plate forms a secondary oxidation area, and the other part of area is partitioned into a secondary acid adding area and a secondary Fenton reagent adding area by the eleventh partition plate;
a twelfth partition plate in the fifth box body section is connected between the fourth partition plate and the fifth partition plate, one part of area partitioned by the twelfth partition plate forms a secondary sedimentation area, and the other part of area is partitioned into a secondary alkali adding area and a secondary flocculant adding area by the thirteenth partition plate;
the sixth tank section is a secondary membrane region.
The utility model has the advantages of a landfill leachate MBR goes out processing integrated equipment and technology of no concentrate, this integration integrated equipment compact structure, area occupied is little, be convenient for integral erection, maintenance, the running cost is low. This equipment combines together fenton technique and membrane technique, can effectively get rid of the difficult degradation organic matter of MBR play aquatic, and fenton iron mud can be held back effectively in traditional precipitation district is reinforceed to the immersed membrane system simultaneously, guarantees that the water is stable up to standard, has solved the problem that the membrane concentration that traditional "preliminary treatment + biochemical treatment + membrane treatment" technology exists is difficult to handle. Compared with membrane processes such as NF nanofiltration, RO (DTRO) reverse osmosis and the like in the traditional process, no concentrated solution is generated, and the effluent stably reaches the standard.
Drawings
Fig. 1 is a layout diagram of an overall structure of an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to fig. 1:
as shown in the attached drawing 1, an integrated device for treating the effluent of a landfill leachate MBR based on a membrane Fenton oxidation technology is provided, the integrated device for treating the effluent of the landfill leachate MBR based on the membrane Fenton oxidation technology is a cuboid box, in the length direction, a first partition plate 15, a second partition plate 16, a third partition plate 17, a fourth partition plate 18 and a fifth partition plate 19 are arranged in the cuboid box, and the five partition plates respectively form a first box body section with the outer wall of the cuboid box, a second box body section, a third box body section, a fourth box body section, a fifth box body section and a sixth box body section.
In the first box body section, a sixth clapboard 20 is connected between the first clapboard 15 and the left side wall of the cuboid box body to divide the first box body section into two partial areas, wherein one partial area is used as a primary oxidation area 3, and the other partial area is divided into a primary acid adding area 1 and a primary Fenton reagent adding area 2 by a seventh clapboard 21;
in the second box body section, an eighth baffle 22 is connected between the first baffle 15 and the second baffle 16, one part of the area partitioned by the eighth baffle 22 is used as a primary sedimentation area 6, and the other part of the area is partitioned by a ninth baffle area 23 into a primary alkali adding area 4 and a primary flocculant adding area 5;
the third box body section is a primary membrane area 7;
in the fourth tank section, a tenth partition plate 24 is connected between the third partition plate 17 and the fourth partition plate 18, and a part of the area partitioned by the tenth partition plate 23 forms a secondary oxidation zone 10, and the other part of the area is partitioned into a secondary acid addition zone 8 and a secondary fenton reagent addition zone 9 by an eleventh partition plate 25;
in the fifth box body section, a twelfth baffle plate 26 is vertically connected between the fourth baffle plate 18 and the fifth baffle plate 19, a part of area separated by the twelfth baffle plate 26 forms a secondary sedimentation area 13, and the other part of area is separated by a thirteenth baffle plate into a secondary alkali adding area 11 and a secondary flocculant adding area 12;
the sixth box section is the secondary membrane region 14.
Effluent of the landfill leachate MBR firstly enters the primary acid adding area, a dosing pump for adding acid liquor is arranged in the primary acid adding area to enable the pH value of the primary acid adding area to be 2-5, and a water outlet of the primary acid adding area is communicated with a primary Fenton reagent dosing area; the water outlet of the primary Fenton reagent feeding area is communicated with a primary oxidation area, and an aeration pipe is laid at the bottom in the primary oxidation area and is provided with a certain amount of aeration;
a water outlet of the primary oxidation area is communicated with a primary alkali adding area, and an alkaline solution is added into the primary alkali adding area through a dosing pump to enable the pH value of the wastewater to be 8-12; the water outlet of the primary alkali adding area is communicated with a primary flocculant adding area; the water outlet of the first-stage dosing region is communicated with the first-stage sedimentation region, and the bottom of the first-stage sedimentation region is provided with a sludge discharge pipe;
the water outlet of the primary sedimentation area is communicated with a primary membrane area, and a membrane component is arranged in the primary membrane area and used for realizing sludge-water separation; the primary membrane area is provided with a sludge discharge system for discharging precipitated iron sludge out of the system;
the primary membrane area pumps water out through a self-priming pump and enters a secondary acid adding area, and a dosing pump is arranged in the secondary acid adding area to add acid liquor so that the pH value of the secondary acid adding area ranges from 2 to 5;
the outlet water of the secondary acid adding area enters a secondary Fenton reagent adding area, and a dosing pump is arranged in the secondary Fenton reagent adding area;
a water outlet of the secondary Fenton reagent feeding area is communicated with a secondary oxidation area, and an aeration pipe is laid at the bottom in the secondary oxidation area;
a water outlet of the secondary oxidation area is communicated with a secondary alkali adding area, and a dosing pump is arranged in the secondary alkali adding area to add an alkaline solution so that the pH value of water in the secondary alkali adding area is 8-12;
the effluent of the second-stage alkali adding area enters a second-stage flocculant adding area, and a certain amount of flocculant is added into the second-stage flocculant adding area to generate colloid flocculation and precipitation;
the effluent of the secondary flocculant adding area enters a secondary sedimentation area, and a sludge discharge pipe is arranged at the bottom of the secondary sedimentation area to discharge iron sludge;
the effluent of the secondary sedimentation zone enters a secondary membrane zone, a membrane component is arranged in the secondary membrane zone and used for realizing mud-water separation, and a sludge discharge system is arranged in the secondary membrane zone and used for discharging the precipitated iron sludge out of the system; the effluent of the secondary membrane area is clear water.
The primary acid adding area, the primary Fenton reagent adding area, the primary alkali adding area, the primary flocculating agent adding area, the secondary acid adding area, the secondary Fenton reagent adding area, the secondary alkali adding area and the secondary flocculating agent adding area are respectively provided with a stirrer. The first-stage acid adding area, the first-stage oxidation area, the first-stage alkali adding area, the second-stage acid adding area and the second-stage alkali adding area are respectively provided with an online pH meter; and online ORP meters are respectively arranged in the first-stage oxidation zone and the second-stage oxidation zone. And aeration pipes are respectively paved under the membrane components of the first membrane area and the second membrane area for aeration.
The membrane components in the first-stage membrane area and the second-stage membrane area are immersed ultrafiltration membrane components respectively.
In order to facilitate understanding of the present invention, the process flow of the integrated apparatus is further described below with reference to fig. 1:
the effluent water of the MBR leachate treatment system enters a first-stage acidification zone 1 through water pump lifting, and as the influent water of the integrated treatment equipment, pH adjustment is carried out in the first-stage acidification zone 1, an online pH meter and a stirrer are arranged in the zone, and the pH value range is controlled to be 2-5 and the stirring is uniform.
The effluent from the primary acid adding zone 1 enters a primary Fenton reagent adding zone 2 as shown by an arrow in figure 1, and a ferrous sulfate solution is added firstly, and then H is added2O2And control of FeSO4/H2O2The dosage ratio of the components is 1: 3-1: 6, and a stirrer is arranged in the region to ensure uniform mixing.
And the effluent of the primary Fenton reagent feeding area 2 enters a primary oxidation area 3, oxidation reaction is carried out in the oxidation area, a certain amount of aeration is arranged in the oxidation area, the oxidation time is ensured to be 2-4 hours, and an online pH meter and an online ORP meter are arranged in the reaction area, and the pH value and the oxidation-reduction potential are displayed.
And the effluent of the primary oxidation zone 3 enters a primary alkali adding zone 4, NaOH solution is added to control the pH value to be 8-12, an online pH meter and a stirrer are arranged in the reaction zone, the pH value range is controlled to be 8-12, and the mixture is uniformly stirred.
The effluent of the first-level alkali adding area 4 enters a first-level flocculating agent PAM adding area 5, certain Polyacrylamide (PAM) is added to promote flocculation and precipitation, part of organic matters are removed, and a stirrer is arranged in the area to ensure uniform mixing.
The effluent of a primary flocculant PAM dosing area 5 enters a primary precipitation area 6, the precipitation time is designed to be 12-24 hours, and Fe (OH) is ensured2，Fe(OH)3The colloid has better flocculation precipitation.
6 play water in one-level precipitation zone gets into one-level membrane district 7, is equipped with submergence formula milipore filter subassembly in the district and has strengthened the precipitation zone among the traditional handicraft and carry out solid-liquid separation, goes out water with self priming pump suction to realize mud-water separation, and flow back membrane district iron mud, improved the iron mud concentration in the processing process, when maintaining high-efficient chemical reaction, make full use of iron mud's the adsorption by coagulation, further get rid of COD, ensured COD's discharge to reach standard. And meanwhile, an aeration pipe is laid under the membrane component for aeration, so that iron mud near the membrane component is in a flowing state, and the pollution of the membrane component can be effectively reduced. The membrane area is provided with a sludge discharge system for discharging precipitated iron sludge out of the system.
And the effluent of the primary membrane area 7 enters a secondary acid adding area 8 for pH adjustment, an online pH meter and a stirrer are arranged in the secondary acid adding area, the pH value range is controlled to be 2-5, and the mixture is uniformly stirred.
The water from the secondary acid adding area 8 enters a secondary Fenton reagent adding area 9, and the ferrous sulfate solution is added firstly, and then H is added2O2And control of FeSO4/H2O2The dosage ratio of the components is 1: 3-1: 6, and a stirrer is arranged in the region to ensure uniform mixing.
And the effluent of the second-stage Fenton reagent feeding area 9 enters a second-stage oxidation area 10, oxidation reaction is carried out in the oxidation area, a certain amount of aeration is arranged in the oxidation area, the oxidation time is ensured to be 2-4 hours, and an online pH meter and an online ORP meter are arranged in the reaction area, and the pH value and the oxidation-reduction potential are displayed.
And the effluent of the secondary oxidation zone 10 enters a secondary alkali adding zone 11, NaOH solution is added to control the pH value to be 8-12, an online pH meter and a stirrer are arranged in the reaction zone, the pH value range is controlled to be 8-12, and the mixture is uniformly stirred.
And the effluent of the secondary alkali adding area 11 enters a secondary flocculating agent PAM adding area 12, certain Polyacrylamide (PAM) is added to promote flocculation and precipitation, part of organic matters are removed, and a stirrer is arranged in the secondary alkali adding area to ensure uniform mixing.
A secondary flocculating agent PAM dosing area 12, a secondary sedimentation area 13, the sedimentation time is designed to be 12-24 hours, and Fe (OH) is ensured2，Fe(OH)3The colloid has better flocculation precipitation.
The second grade is deposited 13 and is gone out water and get into second grade membrane district 14, is equipped with submergence formula milipore filter subassembly in the district and has replaced the settling zone among the traditional handicraft to carry out solid-liquid separation, goes out water with the self priming pump suction to realize mud-water separation to the membrane district iron mud flows back, has improved the iron mud concentration among the processing procedure, when maintaining high-efficient chemical reaction, make full use of iron mud's coagulation and adsorption effect further gets rid of COD, has ensured the discharge to reach standard of COD. And meanwhile, an aeration pipe is laid under the membrane component for aeration, so that iron mud near the membrane component is in a flowing state, and the pollution of the membrane component can be effectively reduced. The membrane area is provided with a sludge discharge system for discharging precipitated iron sludge out of the system.
Finally, it should be noted that the present embodiment is only an exemplary illustration of the present invention and does not limit the protection scope thereof, and those skilled in the art can make insubstantial changes to the present invention, and all that is required is to make modifications to the present invention without creative work, which is within the protection scope of the present patent.
Claims (6)
1. The utility model provides an integration integrated equipment based on membrane fenton oxidation technology handles landfill leachate MBR play water which characterized in that, its whole appearance is the cuboid box, separate into a plurality of reaction zone in the box, include: a first-stage acid adding region, a first-stage Fenton reagent adding region, a first-stage oxidation region, a first-stage alkali adding region, a first-stage flocculant adding region, a first-stage precipitation region, a first-stage membrane region, a second-stage acid adding region, a second-stage Fenton reagent adding region, a second-stage oxidation region, a second-stage alkali adding region, a second-stage flocculant adding region, a second-stage precipitation region and a second-stage membrane region;
the effluent of the landfill leachate MBR firstly enters the primary acid adding area, a dosing pump for adding acid liquor is arranged in the primary acid adding area to enable the pH value of the primary acid adding area to be 2-5, and a water outlet of the primary acid adding area is communicated with a primary Fenton reagent dosing area; the water outlet of the primary Fenton reagent feeding area is communicated with a primary oxidation area, and an aeration pipe is laid at the bottom in the primary oxidation area and is provided with a certain amount of aeration;
a water outlet of the primary oxidation zone is communicated with a primary alkali adding zone, and an alkaline solution is added into the primary alkali adding zone through a dosing pump to enable the pH value of the wastewater to be 8-12; the water outlet of the primary alkali adding area is communicated with a primary flocculant adding area; the water outlet of the first-stage dosing region is communicated with the first-stage sedimentation region, and the bottom of the first-stage sedimentation region is provided with a sludge discharge pipe;
the water outlet of the primary sedimentation area is communicated with a primary membrane area, and a membrane assembly is arranged in the primary membrane area and is used for realizing sludge-water separation; the primary membrane area is provided with a sludge discharge system for discharging precipitated iron sludge out of the system;
the primary membrane area pumps water out through a self-priming pump and enters a secondary acid adding area, and the secondary acid adding area is provided with a dosing pump for adding acid liquor so that the pH value of the secondary acid adding area ranges from 2 to 5;
the outlet water of the secondary acidification zone enters a secondary Fenton reagent dosing zone, and a dosing pump is arranged in the secondary Fenton reagent dosing zone;
the water outlet of the secondary Fenton reagent feeding area is communicated with a secondary oxidation area, and an aeration pipe is laid at the bottom in the secondary oxidation area;
a water outlet of the secondary oxidation zone is communicated with a secondary alkali adding zone, and a chemical adding pump is arranged in the secondary alkali adding zone to add an alkaline solution so that the pH value of wastewater in the secondary alkali adding zone is 8-12;
the effluent of the secondary alkali adding area enters a secondary flocculant adding area, and a certain amount of flocculant is added into the secondary flocculant adding area to generate colloid flocculation and precipitation;
the effluent of the secondary flocculant adding area enters a secondary sedimentation area, and a sludge discharge pipe is arranged at the bottom of the secondary sedimentation area to discharge iron sludge;
the effluent of the secondary sedimentation zone enters a secondary membrane zone, a membrane component is arranged in the secondary membrane zone and used for realizing mud-water separation, and a sludge discharge system is arranged in the secondary membrane zone and used for discharging the precipitated iron sludge out of the system; the effluent of the secondary membrane area is clear water.
2. The integrated equipment for treating the MBR effluent of the landfill leachate based on the membrane Fenton oxidation technology according to claim 1, is characterized in that,
and the primary acid adding area, the primary Fenton reagent adding area, the primary alkali adding area, the primary flocculant adding area, the secondary acid adding area, the secondary Fenton reagent adding area, the secondary alkali adding area and the secondary flocculant adding area are respectively internally provided with a stirrer.
3. The integrated equipment for treating the MBR effluent of the landfill leachate based on the membrane Fenton oxidation technology according to claim 2, is characterized in that,
the first-stage acid adding area, the first-stage oxidation area, the first-stage alkali adding area, the second-stage acid adding area and the second-stage alkali adding area are respectively provided with an online pH meter;
and online ORP meters are respectively arranged in the first-stage oxidation zone and the second-stage oxidation zone.
4. The integrated equipment for treating the MBR effluent of the landfill leachate based on the membrane Fenton oxidation technology according to claim 3, is characterized in that,
and aeration pipes are respectively paved under the membrane components of the first-stage membrane area and the second-stage membrane area for aeration.
5. The integrated equipment for treating the MBR effluent of the landfill leachate based on the membrane Fenton oxidation technology as claimed in claim 4, wherein the membrane modules in the primary membrane area and the secondary membrane area are immersed ultrafiltration membrane modules respectively.
6. The integrated equipment for MBR effluent treatment of landfill leachate based on membrane Fenton oxidation technology as claimed in any one of claims 1 to 5, wherein in the length direction, five vertical partition plates are arranged in the rectangular box body, and the five partition plates respectively form six box body sections from the first to the sixth with the outer wall of the rectangular box body;
in the first box body section, a sixth partition plate is vertically connected with the first partition plate and the left side wall of the cuboid box body, a part of area partitioned by the sixth partition plate forms a primary oxidation area, and the other part of area is partitioned into a primary acid adding area and a primary Fenton reagent adding area by a seventh partition plate;
in the second box body section, an eighth baffle plate is connected between the first baffle plate and the second baffle plate, a part of area partitioned by the eighth baffle plate forms a primary sedimentation area, and the other part of area is partitioned into a primary alkali adding area and a primary flocculant adding area by a ninth baffle plate;
the third box body section is a primary membrane area;
in the fourth box body section, a tenth partition plate is connected between the third partition plate and the fourth partition plate, a part of area partitioned by the tenth partition plate forms a secondary oxidation area, and the other part of area is partitioned into a secondary acid adding area and a secondary Fenton reagent adding area by the eleventh partition plate;
a twelfth partition plate in the fifth box body section is connected between the fourth partition plate and the fifth partition plate, one part of area partitioned by the twelfth partition plate forms a secondary sedimentation area, and the other part of area is partitioned into a secondary alkali adding area and a secondary flocculant adding area by the thirteenth partition plate;
the sixth tank section is a secondary membrane region.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112723653A (en) * | 2020-12-08 | 2021-04-30 | 武汉天源环保股份有限公司 | Garbage leachate full-scale harmless treatment method and system |
| CN113955876A (en) * | 2021-10-28 | 2022-01-21 | 广东台泉环保科技有限公司 | Landfill leachate treatment facility |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112723653A (en) * | 2020-12-08 | 2021-04-30 | 武汉天源环保股份有限公司 | Garbage leachate full-scale harmless treatment method and system |
| CN113955876A (en) * | 2021-10-28 | 2022-01-21 | 广东台泉环保科技有限公司 | Landfill leachate treatment facility |
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