Efficient advanced treatment device for landfill leachate

Abstract

The utility model relates to the technical field of advanced treatment of landfill leachate, in particular to an efficient advanced treatment device for landfill leachate, which adopts the technical scheme that the efficient advanced treatment device comprises an anoxic bioreactor and a nitrogen release tank, the liquid outlet end of the membrane bioreactor is communicated and provided with an ozone contact reactor; the third communicating pipe is communicated with the liquid outlet end of the membrane bioreactor; one end, deviating from the membrane bioreactor, of the third communicating pipe is communicated with a primary filter; the liquid outlet end of the primary filter is communicated with a second communicating pipe; wherein a pH value detection mechanism and a feeding mechanism are fixedly mounted on the second communicating pipe. The problem that a traditional advanced treatment technology for the landfill leachate has certain limitation in the aspect of treating the landfill leachate with high organic matter content and total nitrogen content is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of deep treatment of garbage leachate, in particular to a highly efficient deep treatment device for garbage leachate. Background Art

[0002] Traditional deep treatment technologies for landfill leachate have certain limitations in treating landfill leachate with high organic matter and total nitrogen content. Traditional deep treatment technologies mainly include biochemical, chemical and physical methods. Traditional biochemical treatment methods mainly use microorganisms to degrade organic matter to achieve the purpose of reducing organic matter and total nitrogen content. However, since landfill leachate contains a complex mixture of organic matter, the refractory organic matter and high ammonia nitrogen content make it difficult for microorganisms to effectively degrade it, resulting in limited treatment effects. Traditional chemical treatment methods include oxidation, precipitation and complexation technologies. Although these methods can partially remove organic matter and total nitrogen, a large amount of chemical by-products will be produced during the treatment process, which will increase the treatment cost. Moreover, the treatment efficiency of these methods is still not ideal for landfill leachate with high organic matter and total nitrogen content. Traditional physical treatment technologies mainly include adsorption, reverse osmosis and evaporation. However, physical and mechanical methods can only achieve partial removal of organic matter and total nitrogen, and cannot fundamentally solve the problem of high organic matter and total nitrogen content.

[0003] In summary, the traditional deep treatment technology of landfill leachate has certain limitations in treating high organic matter and total nitrogen content, and cannot achieve effective removal. Therefore, an efficient landfill leachate deep treatment device is proposed to enhance the treatment effect of organic matter and total nitrogen in landfill leachate, improve the removal rate, and meet the requirements of deep treatment. This treatment method can improve the problem that traditional methods are difficult to remove two pollutants at the same time, and achieve efficient and continuous deep treatment of landfill leachate while improving the treatment efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an efficient garbage leachate deep treatment device, which has the advantages of improving the treatment effect of organic matter and total nitrogen in garbage leachate, and improving the removal rate, achieving the advantages of deep treatment, and solving the problem that traditional garbage leachate deep treatment technology has certain limitations in treating garbage leachate with high organic matter and total nitrogen content.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an efficient garbage leachate deep treatment device, comprising an anoxic bioreactor and a nitrogen release tank, wherein the liquid outlet of the anoxic bioreactor is connected to a membrane bioreactor, and the liquid outlet of the membrane bioreactor is connected to an ozone contact reactor, and further comprising a third connecting pipe;

[0006] The third connecting pipe is connected and installed at the liquid outlet of the membrane bioreactor;

[0007] Wherein, one end of the third connecting pipe away from the membrane bioreactor is connected to a primary filter;

[0008] Wherein, the liquid outlet end of the primary filter is connected with a second connecting pipe;

[0009] Wherein, a pH detection mechanism and a feeding mechanism are fixedly installed on the second connecting pipe;

[0010] Wherein, one end of the second connecting pipe away from the primary filter is connected and installed with the liquid inlet end of the ozone contact reactor.

[0011] When using an efficient deep treatment device for landfill leachate in the technical solution, the landfill leachate first enters the anoxic bioreactor. Due to the lack of oxygen in the anoxic bioreactor, anaerobic bacteria are used to degrade and decompose organic matter, part of the organic matter is converted into methane gas, and the concentration of organic matter is reduced. The leachate after anoxic treatment enters the membrane bioreactor, passes through a fine pore filter, intercepts substances and recovers suspended matter and biological particles. In the membrane bioreactor, aerobic microorganisms are used to further degrade and transform organic matter and ammonia nitrogen to improve the treatment effect. After the membrane bioreactor effluent is treated, it enters the ozone contact reactor. In this reactor, ozone gas contacts residual organic matter, chromaticity, suspended solids, etc. in the leachate and undergoes catalytic oxidation reaction. Ozone oxidation can effectively degrade organic matter and reduce residual pollutants. The reflux effluent can provide higher concentrations of organic matter and nutrients, providing additional reactants for the growth and metabolism of microorganisms in the anoxic reaction tank, which helps to promote microbial activity and increase the degradation rate of organic matter. Part of the effluent enters the nitrogen release tank. The purpose of entering the nitrogen release tank is to treat the nitrogen compounds in the treated leachate, especially ammonia nitrogen. Nitrogen release is to convert ammonia nitrogen into nitrogen gas through biological nitrification and denitrification processes, thereby reducing the concentration of nitrogen compounds in the leachate.

[0012] Preferably, the anoxic bioreactor has a built-in reaction tank for containing and treating landfill leachate, and a liquid return pipe is installed on the side of the anoxic bioreactor away from the liquid outlet.

[0013] Preferably, a packing layer is arranged inside the reaction pool built into the anoxic bioreactor to provide a large surface area for fixing and growing anoxic microorganisms, and a feeding device is arranged on the top of the anoxic bioreactor to uniformly feed the incoming garbage leachate into the reaction pool.

[0014] Preferably, the membrane bioreactor is connected and installed with the anoxic bioreactor through a first connecting pipe. A reaction tank is provided inside the membrane bioreactor for accommodating garbage leachate and microorganisms. A membrane separation device is provided inside the membrane bioreactor. The membrane bioreactor transports oxygen to the reaction tank through an aeration system. The membrane bioreactor has a built-in stirring device for mixing the leachate and the microorganisms.

[0015] Preferably, the membrane separation device built into the membrane bioreactor is designed with a microporous membrane or a hollow fiber membrane.

[0016] Preferably, a reaction tank is provided inside the ozone contact reactor for accommodating leachate after ozone catalytic oxidation treatment. The ozone contact reactor is equipped with an ozone supply system. The liquid outlet of the ozone contact reactor is connected to the nitrogen release tank and the liquid return pipe through a three-way pipe. The ozone contact reactor has a built-in stirring device.

[0017] Preferably, the stirring device built into the ozone contact reactor adopts either mechanical or gas stirring.

[0018] Preferably, the nitrogen release pool has a built-in aeration system, the aeration system uses bubbles or gas nozzles to transport oxygen to the bottom of the pool, and the nitrogen release pool has a built-in nitrogen conversion device, which includes an aerobic nitrification zone and an anoxic denitrification zone.

[0019] Preferably, the feeding mechanism is electrically connected to the pH detection mechanism, and the feeding mechanism includes a discharge valve and two storage tanks, the two storage tanks are respectively connected to the feed port at the top of the discharge valve, and the discharge end of the discharge valve is connected to the second connecting pipe.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0021] The utility model sets a third connecting pipe, installs a primary filter on the third connecting pipe, connects the primary filter with the second connecting pipe, and installs a pH detection mechanism and a feeding mechanism on the second connecting pipe, so that the effluent of the membrane bioreactor undergoes a treatment process of filtering and adjusting the pH value. During filtration, larger suspended matter and solid particles are mainly removed through the primary filter to purify the water quality. At the same time, the pH value is adjusted by detecting the pH detection mechanism. When the pH value deviates from the set value, the detector will send a signal to start the feeding mechanism. The feeding mechanism will add an acid or an alkali agent as needed to adjust the pH value in the water. If the pH value is too low, it means that there are too many acidic substances in the water, and the feeding mechanism will add an alkali agent to increase the pH value. On the contrary, if the pH value is too high, it means that there are too many alkaline substances in the water. The feeding mechanism will add acid to lower the pH value. After filtering the effluent and adjusting the acidity and alkali, the water quality can be stabilized to meet the environmental and use requirements and ensure the normal operation of the system. At the same time, the coordinated work of the anoxic bioreactor, membrane bioreactor, ozone contact reactor and nitrogen release tank achieves the purpose of improving the treatment effect of organic matter and total nitrogen in the landfill leachate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the connection structure of the feeding mechanism of the utility model;

[0025] Figure 4 This is a process flow chart of the utility model;

[0026] Figure 5 This is a process flow chart of the feeding structure of the utility model.

[0027] In the figure: 1. anoxic bioreactor; 2. first connecting pipe; 3. membrane bioreactor; 4. pH detection mechanism; 5. second connecting pipe; 6. feeding mechanism; 7. ozone contact reactor; 8. nitrogen release tank; 9. three-way pipe; 10. primary filter; 11. third connecting pipe; 12. liquid return pipe; 13. storage tank; 14. discharge valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the utility model provides an embodiment: an efficient landfill leachate deep treatment device, comprising an anoxic bioreactor 1 and a nitrogen release tank 8, the liquid outlet end of the anoxic bioreactor 1 is connected to a membrane bioreactor 3, the liquid outlet end of the membrane bioreactor 3 is connected to an ozone contact reactor 7, and further comprising a third connecting pipe 11;

[0031] Specifically, the third connecting pipe 11 is connected and installed at the liquid outlet end of the membrane bioreactor 3;

[0032] The end of the third connecting pipe 11 away from the membrane bioreactor 3 is connected to a primary filter 10;

[0033] The liquid outlet of the primary filter 10 is connected to a second connecting pipe 5;

[0034] Wherein, the second connecting pipe 5 is fixedly installed with a pH detection mechanism 4 and a feeding mechanism 6;

[0035] The end of the second connecting pipe 5 away from the primary filter 10 is connected to the liquid inlet end of the ozone contact reactor 7 and installed.

[0036] By setting a third connecting pipe 11, installing a primary filter 10 on the third connecting pipe 11, connecting the primary filter 10 with the second connecting pipe 5, and installing a pH detection mechanism 4 and a feeding mechanism 6 on the second connecting pipe 5, the effluent of the membrane bioreactor 3 is filtered and the pH value is adjusted. During the filtration, the primary filter 10 is mainly used to remove larger suspended matter and solid particles to purify the water quality. At the same time, the pH value is adjusted by the pH detection mechanism 4. When the pH value deviates from the set value, the detector will send a signal to start the feeding mechanism 6. The feeding mechanism 6 will add an acid or alkaline agent as needed to adjust the pH value in the water. If the pH value is too low, it means that there are too many acidic substances in the water, and the feeding mechanism 6 will add an alkaline agent to increase the pH value. On the contrary, if the pH value is too high, it means that there are too many alkaline substances in the water. The feeding mechanism 6 will add an acid to lower the pH value. After filtering the effluent and adjusting the acidity and alkali, the water quality can be stabilized to meet the environmental and use requirements and ensure the normal operation of the system. At the same time, the coordinated work of the anoxic bioreactor 1, the membrane bioreactor 3, the ozone contact reactor 7 and the nitrogen release tank 8 achieves the purpose of improving the treatment effect of organic matter and total nitrogen in the landfill leachate.

[0037] Preferably, the anoxic bioreactor 1 has a built-in reaction tank for containing and treating landfill leachate, and a liquid return pipe 12 is installed on a side of the anoxic bioreactor 1 away from the liquid outlet.

[0038] Preferably, a packing layer is arranged inside the reaction pool built in the anoxic bioreactor 1 to provide a large surface area for fixing and growing anoxic microorganisms, and a feeding device is arranged on the top of the anoxic bioreactor 1 to uniformly feed the incoming landfill leachate into the reaction pool.

[0039] Preferably, the membrane bioreactor 3 is connected and installed with the anoxic bioreactor 1 through the first connecting pipe 2. A reaction tank is provided inside the membrane bioreactor 3 for accommodating garbage leachate and microorganisms. A membrane separation device is provided inside the membrane bioreactor 3. The membrane bioreactor 3 transports oxygen to the reaction tank through an aeration system. The membrane bioreactor 3 has a built-in stirring device for mixing the leachate and the microorganisms.

[0040] Preferably, the membrane separation device built into the membrane bioreactor 3 is designed with a microporous membrane or a hollow fiber membrane.

[0041] Preferably, a reaction tank is provided inside the ozone contact reactor 7 for accommodating leachate after ozone catalytic oxidation treatment. The ozone contact reactor 7 is equipped with an ozone supply system. The liquid outlet of the ozone contact reactor 7 is connected to the nitrogen release tank 8 and the liquid return pipe 12 through a three-way pipe 9. The ozone contact reactor 7 has a built-in stirring device.

[0042] Preferably, the stirring device built into the ozone contact reactor 7 adopts either mechanical or gas stirring.

[0043] Preferably, the nitrogen release pool 8 has a built-in aeration system, which uses bubbles or gas nozzles to transport oxygen to the bottom of the pool. The nitrogen release pool 8 has a built-in nitrogen conversion device, which includes an aerobic nitrification zone and an anoxic denitrification zone.

[0044] Preferably, the feeding mechanism 6 is electrically connected to the pH detection mechanism 4 , and the feeding mechanism 6 includes a discharge valve 14 and two storage tanks 13 , the two storage tanks 13 are respectively connected to the feed port at the top of the discharge valve 14 , and the discharge end of the discharge valve 14 is connected to the second connecting pipe 5 .

[0045] When the utility model is used, the garbage leachate first enters the anoxic bioreactor 1. Due to the lack of oxygen in the anoxic bioreactor, anaerobic bacteria are used to degrade and decompose organic matter, part of the organic matter is converted into methane gas, and the concentration of organic matter is reduced. The leachate after anoxic treatment enters the membrane bioreactor 3, through a fine pore filter, the material is intercepted and the suspended matter and biological particles are recovered. In the membrane bioreactor 3, aerobic microorganisms are used to further degrade and transform organic matter and ammonia nitrogen to improve the treatment effect. After the effluent of the membrane bioreactor 3 is treated, it enters the ozone contact reactor 7. In the reactor, ozone gas contacts residual organic matter, chromaticity, suspended matter, etc. in the leachate, and undergoes catalytic oxidation reaction. Ozone oxidation can effectively degrade organic matter and reduce residual pollutants. The reflux effluent can provide higher concentrations of organic matter and nutrients, and provide additional reactants for the growth and metabolism of microorganisms in the anoxic reaction tank, which helps to promote microbial activity and increase the degradation rate of organic matter. Part of the effluent enters the nitrogen release tank 8. The purpose of entering the nitrogen release tank 8 is to treat the nitrogen compounds in the treated leachate, especially ammonia nitrogen. Nitrogen release is to convert ammonia nitrogen into nitrogen gas through biological nitrification and denitrification processes, thereby reducing the concentration of nitrogen compounds in the leachate.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An efficient landfill leachate deep treatment device, comprising an anoxic bioreactor (1) and a nitrogen release tank (8), wherein the liquid outlet of the anoxic bioreactor (1) is connected to a membrane bioreactor (3), and the liquid outlet of the membrane bioreactor (3) is connected to an ozone contact reactor (7), characterized in that: Also includes: A third connecting pipe (11) connected to the liquid outlet of the membrane bioreactor (3); Wherein, one end of the third connecting pipe (11) away from the membrane bioreactor (3) is connected to a primary filter (10); Wherein, the liquid outlet end of the primary filter (10) is connected to and installed with a second connecting pipe (5); Wherein, a pH detection mechanism (4) and a feeding mechanism (6) are fixedly installed on the second connecting pipe (5); The end of the second connecting pipe (5) facing away from the primary filter (10) is connected to the liquid inlet end of the ozone contact reactor (7).

2. The highly efficient landfill leachate deep treatment device according to claim 1, characterized in that: The anoxic bioreactor (1) has a built-in reaction pool for containing and treating landfill leachate, and a liquid return pipe (12) is installed on the side of the anoxic bioreactor (1) away from the liquid outlet.

3. The highly efficient landfill leachate deep treatment device according to claim 2 is characterized in that: A packing layer is arranged inside the reaction pool built in the anoxic bioreactor (1) to provide a large surface area for fixing and growing anoxic microorganisms. A feeding device is arranged on the top of the anoxic bioreactor (1) to uniformly feed the incoming garbage leachate into the reaction pool.

4. The highly efficient landfill leachate deep treatment device according to claim 1, characterized in that: The membrane bioreactor (3) is connected and installed with the anoxic bioreactor (1) via a first connecting pipe (2); a reaction pool is provided inside the membrane bioreactor (3) for containing garbage leachate and microorganisms; a membrane separation device is provided inside the membrane bioreactor (3); the membrane bioreactor (3) transports oxygen to the reaction pool via an aeration system; and a stirring device is built into the membrane bioreactor (3) for mixing the leachate and the microorganisms.

5. The highly efficient landfill leachate deep treatment device according to claim 4, characterized in that: The membrane separation device built into the membrane bioreactor (3) is designed with a microporous membrane or a hollow fiber membrane.

6. The efficient deep treatment device for landfill leachate according to claim 1 is characterized in that: The ozone contact reactor (7) is provided with a reaction tank inside for containing leachate after ozone catalytic oxidation treatment. The ozone contact reactor (7) is equipped with an ozone supply system. The liquid outlet of the ozone contact reactor (7) is connected to the nitrogen release tank (8) and the liquid return pipe (12) through a three-way pipe (9). The ozone contact reactor (7) has a built-in stirring device.

7. The highly efficient landfill leachate deep treatment device according to claim 6, characterized in that: The stirring device built into the ozone contact reactor (7) adopts either mechanical stirring or gas stirring.

8. The highly efficient landfill leachate deep treatment device according to claim 1, characterized in that: The nitrogen release pool (8) has a built-in aeration system, and the aeration system uses bubbles or gas nozzles to transport oxygen to the bottom of the pool. The nitrogen release pool (8) has a built-in nitrogen conversion device, and the nitrogen conversion device includes an aerobic nitrification zone and an anoxic denitrification zone.

9. The highly efficient landfill leachate deep treatment device according to claim 1, characterized in that: The feeding mechanism (6) is electrically connected to the pH detection mechanism (4). The feeding mechanism (6) comprises a discharge valve (14) and two storage tanks (13). The two storage tanks (13) are respectively connected to the feed port at the top of the discharge valve (14). The discharge end of the discharge valve (14) is connected to the second connecting pipe (5).

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