CN216550047U - Garbage transfer station leachate treatment system - Google Patents
Garbage transfer station leachate treatment system Download PDFInfo
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- CN216550047U CN216550047U CN202220134800.2U CN202220134800U CN216550047U CN 216550047 U CN216550047 U CN 216550047U CN 202220134800 U CN202220134800 U CN 202220134800U CN 216550047 U CN216550047 U CN 216550047U
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Abstract
The utility model designs a garbage transfer station leachate treatment system which sequentially comprises a pretreatment system, a sedimentation treatment system, a multi-effect catalytic oxidation system and an MAO pool degradation system according to a treatment process; the pretreatment system comprises a fine grid tank and a regulating tank; the sedimentation treatment system comprises a pipeline mixer, a primary sedimentation tank and a first intermediate tank; the multi-effect catalytic oxidation system comprises a multi-effect catalytic oxidation tank, a UV generating device, an ozone generating device, an H2O2 feeding device and a second intermediate tank; the MAO pond degradation system comprises a MAO pond and a secondary sedimentation pond; the multi-effect catalytic oxidation tank can generate hydroxyl radicals through a plurality of reaction mechanisms to effectively decompose organic pollutants through a UV/O3/H2O2 combined process, can meet the treatment requirements in a short time, and solves the problem that a plurality of aromatic organic intermediates are generated when a multi-effect catalytic oxidation system treats organic matters through an AO and A2O anaerobic-anoxic-aerobic process, so that the organic matters are not thoroughly degraded.
Description
Technical Field
The utility model relates to the technical field of garbage treatment, in particular to a garbage transfer station leachate treatment system.
Background
The main modes of garbage disposal at present are incineration method and incineration method, and the incineration method is generally adopted in garbage incineration power plants for disposing garbage. Before the garbage is incinerated, the garbage needs to be fermented to remove water in the garbage and improve the heat value and combustion value of the garbage, and a large amount of garbage percolation is generated in the processAnd (4) liquid. The landfill leachate has complex water quality, contains various toxic and harmful inorganic and organic matters, and has the main components of NH3-N, BOD, CODcr, suspended matters and Cl－And other pollutants, wherein the leachate also contains non-chlorinated aromatic compounds such as naphthalene and phenanthrene, chlorinated aromatic compounds, phosphoric acid vinegar, phenolic compounds, aniline compounds and the like which are difficult to biodegrade, and the leachate has high pollution and cannot be directly discharged. The existing technical method for treating the landfill leachate mainly comprises a physical chemical method and a biological method, but the treatment efficiency and the effect of treating corresponding pollutants of the leachate through the metabolism of microorganisms are relatively low. The advanced oxidation technology generates hydroxyl free radicals through reaction, the free radicals have strong oxidizability, organic pollutants can be effectively decomposed through the free radical reaction, the treatment requirement can be met in a short time, the photochemical oxidation method is rapidly developed in recent years due to mild reaction conditions and oxidation capacity, but due to the limitation of the reaction conditions, a plurality of aromatic organic intermediates are generated when organic matters are treated by the photochemical method, so that the organic matters are not completely degraded. Therefore, it is necessary to develop a high-efficiency, fast and thorough garbage transfer station garbage leachate treatment process.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model designs a leachate treatment system of a garbage transfer station.
In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented by the following technical contents:
a garbage transfer station leachate treatment system sequentially comprises a pretreatment system, a sedimentation treatment system, a multi-effect catalytic oxidation system and an MAO pool degradation system according to a treatment process; the pretreatment system comprises a fine grid tank and a regulating tank; the sedimentation treatment system comprises a pipeline mixer, a primary sedimentation tank and a first intermediate tank; the multi-effect catalytic oxidation system comprises a multi-effect catalytic oxidation tank, a UV generating device, an ozone generating device, an H2O2 feeding device and a second intermediate tank; the MAO pond degradation system comprises a MAO pond and a secondary sedimentation pond, wherein the MAO pond consists of a primary A2O pond and a secondary AO pond;
the device comprises a grid pool, an adjusting pool, a pipeline mixer, a primary sedimentation pool, a first intermediate pool, a first lifting pump, a second lifting pump, a multi-effect catalytic oxidation pool, a second intermediate pool, a MAO pool and a secondary sedimentation pool.
Further, the grid spacing of the fine grid pool is 0.5-2 mm.
Further, the pipeline mixer is connected with a pH adjusting dosing pipe, a PAC feeding pipe and a PAM feeding pipe.
Further, the first middle pool is connected with a pH adjusting dosing pump.
Further, a UV generating device and an ozone generating device are installed in the multi-effect catalytic oxidation tank, and the multi-effect catalytic oxidation tank is connected with an H2O2 feeding device and an ozone catalyst feeding device.
The utility model has the beneficial effects that:
(1) the multi-effect catalytic oxidation pond solves the problem that the generation of hydroxyl radicals in leachate with complex components in a system which independently operates when organic matters are treated by the traditional advanced oxidation technology through a UV/O3/H2O2 combined process, can effectively decompose organic pollutants by generating hydroxyl radicals through multiple reaction mechanisms, and can meet the treatment requirements in a short time;
(2) the utility model adds the step of degrading through the MAO pool after the penetrating fluid is treated in the multi-effect catalytic oxidation pool, and solves the problems that various aromatic organic intermediates are generated when organic matters are treated by advanced oxidation technology through AO and A2O anaerobic anoxic aerobic processes, so that the organic matters are not degraded thoroughly, the organic matters, N, P and other pollutants are still remained after treatment, and the water eutrophication is still caused after the discharge;
(3) the utility model combines the PAC and PAM precipitation process, the advanced oxidation process and the anaerobic anoxic and aerobic process, and solves the problems that the leachate of the garbage transfer station contains various toxic and harmful inorganic matters and organic matters which can not be directly discharged, and the effluent has the risk of not reaching the standard.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a flow structure of a leachate treatment system of a refuse transfer station.
In the drawings, the components represented by the respective reference numerals are listed below:
100-pretreatment system, 101-fine grid tank, 102-adjusting tank, 200-sedimentation treatment system, 201-pipeline mixer, 202-primary sedimentation tank, 203-first intermediate tank, 300-multi-effect catalytic oxidation system, 301-multi-effect catalytic oxidation tank, 302-second intermediate tank, 400-MAO tank degradation system, 401-MAO tank and 402-secondary sedimentation tank.
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.
Examples
Referring to fig. 1, a leachate treatment system for a refuse transfer station sequentially comprises a pretreatment system 100 for removing large-particle impurities, a sedimentation treatment system 200 for removing floating oil and suspended matters, a multi-effect catalytic oxidation system 300 for removing macromolecular organic matters and chromaticity, and an MAO pond degradation system 400 for degrading organic matters, N, P and other pollutants in leachate according to a treatment process; the pretreatment system 100 comprises a fine grid tank 101 and a regulating tank 102; the sedimentation treatment system 200 comprises a pipeline mixer 201, a primary sedimentation tank 202 and a first intermediate tank 203; the multi-effect catalytic oxidation system 300 comprises a multi-effect catalytic oxidation tank 301, a UV generating device, an ozone generating device, an H2O2 feeding device and a second intermediate tank 302; the MAO pond degradation system 400 comprises a MAO pond 401 and a secondary sedimentation pond 402, wherein the MAO pond 401 consists of a primary A2O pond and a secondary AO pond; the fine grid pond 101 is communicated with the regulating pond 102, the grid spacing of the fine grid pond 101 is 0.5-2mm, the regulating pond 102 is connected with a pipeline mixer 201 through a first lift pump, percolate is subjected to grid large particle impurity removal and then enters the regulating pond 102 to mix water quality, the pipeline mixer 201 is communicated with a primary sedimentation pond 202, the pipeline mixer 201 is connected with a pH adjusting dosing pipe, a PAC feeding pipe and a PAM feeding pipe, the percolate treated by the pretreatment system 100 is lifted to the pipeline mixer 201 by a pump, NaOH is added through the pH adjusting dosing pipe to adjust the pH, then PAC and PAM are added through the PAC feeding pipe and the PAM feeding pipe to primary sedimentation, the primary sedimentation pond 202 is communicated with a first intermediate pond 203, the first intermediate pond 203 is connected with the pH adjusting dosing pump and is connected with a multi-effect catalytic oxidation pond 301 through a second lift pump, the percolate after floating oil and suspended matters are removed by the sedimentation treatment system 200 is added with alkali through the pH adjusting dosing pump to adjust the pH and then is discharged into the first intermediate pond 203, the multi-effect catalytic oxidation tank 301 is communicated with the second middle tank 302, a UV generating device and an ozone generating device are arranged in the multi-effect catalytic oxidation tank 301, the multi-effect catalytic oxidation tank 301 is connected with an H2O2 feeding device and an ozone catalyst feeding device, the percolate in the first intermediate tank 203 is lifted by a second lift pump and then enters the multi-effect catalytic oxidation tank 301, the percolate is subjected to catalytic oxidation reaction to remove macromolecular organic matters and chromaticity and then enters the second intermediate tank 302 for standing treatment, the second intermediate tank 302 is connected with the MAO tank 401 through a third lift pump, the percolate in the second intermediate tank 302 is lifted by the third lift pump and then enters the MAO tank 401 to degrade pollutants such as organic matters, N, P and the like in the wastewater, the MAO tank 401 is connected with the secondary sedimentation tank 402, and leachate passing through the pretreatment system 100, the sedimentation treatment system 200, the multi-effect catalytic oxidation system 300 and the MAO tank 401 degradation system 400 is settled in the secondary sedimentation tank 402 and then discharged after reaching the standard.
The specific application of the utility model in use is as follows:
(1) the leachate of the garbage transfer station enters a regulating tank 102 to mix water after large-particle impurities are removed by a fine grid tank 101 of a pretreatment system 100.
(2) The leachate treated by the pretreatment system 100 is lifted to a pipeline mixer 201 of a sedimentation treatment system 200 by a first lifting pump, and then PAC and PAM are added to a primary sediment after the pH is adjusted, the PAC and the PAM are subjected to primary sediment treatment to remove floating oil and suspended matters, the PAC has high electric neutralization and bridging effects on colloids and particles in water as a flocculating agent and can strongly remove micro-toxic substances and heavy metal ions, the PAM is used as a coagulant aid to generate substances insoluble in a solution where reactants are located when a chemical reaction occurs, the suspended substances in the wastewater are removed by sedimentation under the action of gravity, and the leachate after the floating oil and the suspended matters are removed by the primary sediment is discharged into a first intermediate water tank to be added with alkali to adjust the pH.
(3) The percolate in the first intermediate tank 203 is lifted by a second lifting pump and then enters a multi-effect catalytic oxidation tank 301 of a multi-effect catalytic oxidation system 300, UV and O3 are produced in a catalytic oxidation pond through a UV generating device, an ozone generating device, an H2O2 feeding device and an ozone catalyst feeding device, H2O2 and an ozone catalyst are added, percolate is subjected to catalytic oxidation reaction to remove macromolecular organic matters and chromaticity, the multi-effect catalytic oxidation pond 301 can rapidly and thoroughly oxidize organic pollutants through a UV/O3/H2O2 advanced oxidation system, the UV/O3/H2O2 advanced oxidation system can at least realize a combined system of three advanced oxidation modes (UV/O3, H2O2/O3 and UV/H2O2), the method has good removal effect on undegradable trace pollutants such as odor substances, disinfection byproducts, pesticide residues, endocrine disruptors and the like in water;
the UV/H2O2 oxidation system is used for processing, the activation effect of UV is utilized to excite H2O2 to generate hydroxyl radicals, the hydroxyl radicals can react with organic matters without selectivity, and the oxidation capability of the hydroxyl radicals to organic pollutants is obviously improved compared with that of the independent UV or H2O2 processing;
the H2O2/O3 oxidation system is used for processing, a synergistic interaction effect exists between O3 and H2O2, and H2O2 can promote O3 to generate hydroxyl free radicals with higher concentration, so that the effect of enhancing the oxidative degradation concentrated solution is achieved. The effect of treating the penetrating fluid by the H2O2/O3 system is far better than that of treating O3 or H2O2 alone. The H2O2/O3 oxidation system can more easily decompose macromolecular HA in the penetrating fluid, and the molecular weight of soluble organic matters in the penetrating fluid is reduced and the humification degree is reduced after the penetrating fluid is treated by the H2O2/O3 oxidation system;
the treatment of a UV/O3 oxidation system, wherein the UV/O3 oxidation utilizes the catalytic action of UV to improve the ozone oxidation capacity and the ozone utilization rate, the UV cannot remain in the treated leachate, the ozone oxidation capacity can be improved, and ozone is directly generated in the leachate or air, so that the ozone utilization rate can be directly or indirectly improved, and the UV can also generate photolysis on a part of organic matters or directly kill microorganisms;
and introducing the sewage treated by the multi-effect catalytic oxidation tank 301 into a second intermediate tank 302 for standing treatment.
(4) The leachate of the second intermediate tank 302 is lifted by a third lift pump and then enters a MAO tank 401 degradation system 400, organic matters, pollutants N, P and the like in the leachate degrade the organic matters, pollutants N, P and the like in the leachate by a multi-stage anoxic-aerobic activated sludge process of the MAO tank 401, and the MAO tank 401 comprises a first-stage A2O tank and a second-stage AO tank;
in the A2O tank, sewage is completely mixed in an anaerobic tank, and after anaerobic decomposition for a certain time, part of BOD is removed, so that part of nitrogen compounds is converted into N2 to be released, phosphorus is released by phosphorus accumulating microorganisms in the returned sludge, and the requirement of bacteria on phosphorus is met. Then the sewage flows into an anoxic tank, denitrifying bacteria in the tank take undecomposed carbon-containing organic matters in the sewage as carbon sources, and nitrate radicals flowing back through internal circulation in the aerobic tank are reduced into N2 to be released. Then the sewage flows into an aerobic tank, NH3-N in the water is subjected to nitration reaction to generate nitrate radicals, meanwhile, organic matters in the water are oxidized and decomposed to supply energy to phosphorus-absorbing microorganisms, the microorganisms absorb phosphorus from the water, the phosphorus enters cell tissues and is enriched in the microorganisms, and the phosphorus-rich sludge is discharged from the system after precipitation and separation;
in the AO pool, heterotrophic bacteria hydrolyze suspended pollutants such as starch, fiber, carbohydrate and the like and soluble organic matters in the sewage into organic acid at an anoxic section, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, and when products after anoxic hydrolysis enter an aerobic pool for aerobic treatment, the biodegradability and the oxygen efficiency of the sewage can be improved; in an anoxic section, heterotrophic bacteria ammoniate pollutants such as protein, fat and the like to free ammonia NH3 and NH4+, under the condition of sufficient oxygen supply, NH3-N (NH4+) is oxidized into NO3 through nitrification of the autotrophic bacteria, and the NO 3-is returned to a pool A through backflow control, and under the anoxic condition, NO 3-is reduced into molecular nitrogen (N2) through denitrification of the heterotrophic bacteria, so that ecological circulation of C, N, O is completed, and sewage harmless treatment is realized. And (3) introducing the sewage treated by the MAO tank 401 into a secondary sedimentation tank 402 to remove suspended matters, and discharging the effluent of the secondary sedimentation tank 402 after reaching the standard.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The utility model provides a rubbish transfer station filtration liquid processing system which characterized in that: the garbage transfer station leachate treatment system sequentially comprises a pretreatment system, a sedimentation treatment system, a multi-effect catalytic oxidation system and a MAO pool degradation system according to the treatment process; the pretreatment system comprises a fine grid tank and an adjusting tank in sequence; the sedimentation treatment system comprises a pipeline mixer, a primary sedimentation tank and a first intermediate tank; the multi-effect catalytic oxidation system comprises a multi-effect catalytic oxidation tank, a UV generating device, an ozone generating device, an H2O2 feeding device and a second intermediate tank; the MAO pond degradation system comprises a MAO pond and a secondary sedimentation pond, wherein the MAO pond consists of a primary A2O pond and a secondary AO pond;
the device comprises a grid pool, an adjusting pool, a pipeline mixer, a primary sedimentation pool, a first intermediate pool, a first lifting pump, a second lifting pump, a multi-effect catalytic oxidation pool, a second intermediate pool, a MAO pool and a secondary sedimentation pool.
2. The leachate treatment system of the refuse transfer station of claim 1, wherein: the grid distance of the fine grid pool is 0.5-2 mm.
3. The leachate treatment system of the refuse transfer station of claim 1, wherein: the pipeline mixer is connected with a pH adjusting dosing pipe, a PAC feeding pipe and a PAM feeding pipe.
4. The leachate treatment system of the refuse transfer station of claim 1, wherein: the first middle pool is connected with a pH adjusting dosing pump.
5. The leachate treatment system of the refuse transfer station of claim 1, wherein: the multi-effect catalytic oxidation pond is internally provided with a UV generating device and an ozone generating device, and is connected with a H2O2 feeding device and an ozone catalyst feeding device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220134800.2U CN216550047U (en) | 2022-01-19 | 2022-01-19 | Garbage transfer station leachate treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220134800.2U CN216550047U (en) | 2022-01-19 | 2022-01-19 | Garbage transfer station leachate treatment system |
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| CN216550047U true CN216550047U (en) | 2022-05-17 |
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| CN202220134800.2U Active CN216550047U (en) | 2022-01-19 | 2022-01-19 | Garbage transfer station leachate treatment system |
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