CN209835906U - Nontoxic processing system of landfill leachate - Google Patents

Abstract

The utility model belongs to the technical field of refuse treatment, in particular to nontoxic processing system of landfill leachate is closed, including filter, preliminary sedimentation tank, equalizing basin, anaerobic reactor, AO reaction tank, ultrafiltration pipe, delivery pipe, incineration chamber and air-blower, filter, preliminary sedimentation tank, equalizing basin, anaerobic reactor are connected in series in proper order and all link to each other with the incineration chamber, AO reaction tank connects between anaerobic reactor and ultrafiltration pipe, air-blower connection is in AO reaction tank's one side with air input to AO reaction tank, and filtration liquid is discharged from the delivery pipe after ultrafiltration pipe ultrafiltration. The utility model discloses an adopt closed design, concentrate incineration disposal with the foul smell that landfill leachate self has and the marsh gas that its anaerobic fermentation produced to this avoids during foul smell and marsh gas directly discharge to the air, has reduced and has caused harmful effects to atmospheric environment and crowd.

Description

Nontoxic processing system of landfill leachate

Technical Field

The utility model belongs to the technical field of refuse treatment, in particular to nontoxic processing system of landfill leachate.

Background

The garbage leachate is sewage seeped out by rotting, deteriorating and fermenting animal and plant organic matters in garbage and is a secondary pollutant generated in the garbage treatment process. The water quality characteristics of landfill leachate mainly include complex water quality, high organic matter concentration, high metal content, large water quality change, high ammonia nitrogen content, imbalance of nutrient element proportion (mainly the imbalance of C, N, P proportion), and the like, and the landfill leachate is the most important pollution source of underground water at present.

With the increasing awareness of environmental protection, people prefer to adopt a biological method for treating the landfill leachate, such as a UASB anaerobic process, an A/O process and the like. However, the landfill leachate itself has a strong odor, so that the odor is also generated during the treatment process, and if the landfill leachate is not treated, the landfill leachate may adversely affect the surrounding atmospheric environment and people.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a nontoxic processing system of landfill leachate can reduce landfill leachate to peripheral atmospheric environment and crowd's harmful effects to foul smell centralized processing at the processing landfill leachate in-process.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a nontoxic processing system of landfill leachate, is closed, includes filter, preliminary sedimentation tank, equalizing basin, anaerobic reactor, AO reaction tank, ultrafiltration pipe, delivery pipe, incineration chamber and air-blower, filter, preliminary sedimentation tank, equalizing basin, anaerobic reactor are connected in series in proper order and all link to each other with the incineration chamber, AO reaction tank connects between anaerobic reactor and ultrafiltration pipe, the air-blower is connected in AO reaction tank's one side with air input to AO reaction tank in, and the leachate is discharged from the delivery pipe after the ultrafiltration of ultrafiltration pipe.

By adopting the technical scheme, the garbage leachate firstly passes through a filter to filter large particulate matters and fibrous substances, then enters a primary sedimentation tank to be precipitated, the precipitated sewage enters an adjusting tank to be homogenized and equalized, then enters an anaerobic reactor, the sewage is transported to an A/O reaction tank after most organic pollutants are removed, the sewage firstly enters an A tank (an anoxic tank), denitrifying bacteria reduce nitrates into nitrogen by utilizing organic carbon in the sewage under the anoxic condition, the organic load is reduced while denitrification is performed, the alkalinity of subsequent nitration reaction is supplemented, meanwhile, part of suspended pollutants are adsorbed and decomposed, the biodegradability of the sewage is improved, then the sewage enters an O tank (an aerobic tank) through plug flow, the residual organic matters are further degraded under the aerobic condition, and meanwhile nitrifying bacteria oxidize ammonia nitrogen in the sewage into nitrate nitrogen, and then reflowing to the tank A for denitrification. The effluent after A/O treatment enters an ultrafiltration membrane to further remove pollutants such as macromolecular COD (chemical oxygen demand), suspended matters and the like, and the final effluent reaches the standard of Integrated wastewater discharge Standard.

In the landfill leachate treatment process, the system is of a closed design, and then the odor of the landfill leachate and the methane generated by anaerobic fermentation are conveyed to the incineration chamber in a concentrated mode for combustion to generate carbon dioxide and water with less pollution to the atmosphere, so that the odor and the methane are prevented from being directly discharged to the air, and adverse effects on the atmospheric environment and people are reduced.

The utility model discloses further set up to: an induced draft fan is connected between the filter, the primary sedimentation tank, the regulating tank and the anaerobic reactor and the incineration chamber.

Through adopting above-mentioned technical scheme, the setting up of draught fan makes things convenient for the gas in filter, the preliminary sedimentation pond, equalizing basin and the anaerobic reactor can be quick during the transport to the combustion chamber of leading, has effectively accelerated exhaust-gas treatment's efficiency.

The utility model discloses further set up to: the non-toxic treatment system for the landfill leachate also comprises a sludge storage tank, and the filter, the primary sedimentation tank, the anaerobic reactor and the A/O reaction tank are all connected with the sludge storage tank.

By adopting the technical scheme, the inorganic sludge generated by the primary sedimentation tank, the activated sludge generated in the biodegradation process of the anaerobic system and the aerobic system are discharged into the sludge storage tank, so that the sludge is conveniently and intensively treated, and the sludge treatment efficiency of operators is improved.

The utility model discloses further set up to: one side of the sludge storage pool is connected with a dehydrator.

Through adopting above-mentioned technical scheme, the moisture content of the mud in the mud reservoir is higher usually, and it carries out dehydration after in conveying the hydroextractor through the pump, can reduce the treatment volume of mud to a certain extent, reduces sludge treatment's cost.

The utility model discloses further set up to: one side of the dehydrator is connected with an incinerator for incinerating dehydrated sludge.

By adopting the technical scheme, a small amount of organic matter residues usually exist in the dewatered sludge, the sludge is burnt to promote the full decomposition of the part of organic matter, and the residue generated by burning contains a large amount of mineral substances, so that the sludge can be better applied to plant fertilizers, and the effective utilization rate of resources is improved.

The utility model discloses further set up to: one side of the anaerobic reactor is connected with a biogas torch.

By adopting the technical scheme, the biogas generated by anaerobic fermentation mainly comprises methane, carbon dioxide, nitrogen, hydrogen, oxygen, hydrogen sulfide and other gases, wherein the content of methane is generally 55-75%, the content of carbon dioxide is 25-40%, and the content of other gases is 5-10%; whereby the final gas after combustion is mainly carbon dioxide. The biogas torch is taken as an emergency combustion device, can play a good role in allocating for the incinerator when the anaerobic reaction of the landfill leachate is too fast, and can maintain the balance of the internal air pressure of the system to a certain extent.

The utility model discloses further set up to: one side of the anaerobic reactor is connected with a circulating pipe.

By adopting the technical scheme, the circulating pipe enables the landfill leachate in the anaerobic reactor to realize self-circulation, improves the anaerobic reaction efficiency of the landfill leachate, and has the characteristics of simple structure and convenient operation.

The utility model discloses further set up to: one side of the A/O reaction tank is connected with a cooling tower.

Through adopting above-mentioned technical scheme, landfill leachate can produce certain heat when the fermentation in the AO reaction tank, and the cooling tower can cool off the landfill leachate in the fermentation for landfill leachate's fermentation temperature maintains a stable temperature range, improves the treatment effeciency of AO reaction tank to landfill leachate.

To sum up, the utility model discloses a beneficial technological effect does:

1. the utility model adopts the closed design, the odor of the garbage leachate and the methane generated by the anaerobic fermentation are intensively burned, so that the odor and the methane are prevented from being directly discharged into the air, and the adverse effect on the atmospheric environment and the crowd is reduced;

2. the utility model, through the arrangement of the draught fan, is beneficial to accelerating the processing efficiency of the odor and the methane, and has the characteristics of simple structure and convenient operation;

3. the utility model discloses a setting of mud reservoir, hydroextractor and burning furnace burns, the convenient centralized processing to mud has effectively improved the treatment effeciency of operating personnel to mud.

Drawings

FIG. 1 is a flow diagram of a non-toxic landfill leachate treatment system;

fig. 2 is a schematic structural diagram of a landfill leachate non-toxic treatment system.

In the figure, 1, filter; 2. a primary sedimentation tank; 3. a regulating tank; 4. an anaerobic reactor; 5. an A/O reaction tank; 6. an ultrafiltration tube; 7. a discharge pipe; 8. an incineration chamber; 9. a blower; 10. a sludge storage tank; 11. an induced draft fan; 12. a biogas torch; 13. a circulation pipe; 14. a cooling tower; 15. a dehydrator; 16. an incinerator; 51. a pool A; 52. and (4) an O pool.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a nontoxic processing system of landfill leachate, be closed, including filter 1, primary sedimentation tank 2, equalizing basin 3, anaerobic reactor 4, AO reaction tank 5, ultrafiltration pipe 6, delivery pipe 7, incineration chamber 8, air-blower 9 and sludge storage tank 10.

The filter 1, the primary sedimentation tank 2, the regulating tank 3 and the anaerobic reactor 4 are connected in series in sequence and are connected with the incineration chamber 8, an induced draft fan 11 is connected between the filter 1, the primary sedimentation tank 2, the regulating tank 3, the anaerobic reactor 4 and the incineration chamber 8, and one side of the anaerobic reactor 4 is also connected with a biogas torch 12 and a circulating pipe 13.

The landfill leachate firstly filters large particulate matters and fibrous substances through a filter 1, then enters a primary sedimentation tank 2 for sedimentation, the sewage after sedimentation enters an adjusting tank 3 for homogenization and volume equalization, and then is conveyed to an anaerobic reactor 4, and the denitrifying bacteria in the anaerobic reactor 4 are rapidly fermented under the drive of a circulating pipe 13, so that most organic pollutants in the sewage are removed. The induced draft fan 11 conveys the odor in the filter 1, the primary sedimentation tank 2 and the adjusting tank 3 and the methane in the anaerobic reactor 4 to the incineration chamber 8 for incineration, and the methane torch 12 is used as emergency combustion equipment, so that the odor and the methane are decomposed into products with small influence on the atmospheric environment and the human body, such as carbon dioxide, water and the like.

The A/O reaction tank 5 is connected between the anaerobic reactor 4 and the ultrafiltration tube 6, and includes an A tank 51 and an O tank 52. The A tank 51 is an anoxic tank and is connected to the anaerobic reactor 4, the O tank 52 is an aerobic tank and is connected to the ultrafiltration tube 6, and the blower 9 is connected to the O tank 52 side of the A/O reaction tank 5 and inputs air into the O tank 52. One side of the a/O reaction tank 5 is connected to a cooling tower 14 so that the operating temperatures of the a tank 51 and the O tank 52 are maintained within a stable interval range, contributing to the improvement of the sewage treatment efficiency.

The sewage flowing out of the anaerobic reactor 4 firstly enters the A tank 51, the denitrifying bacteria in the A tank 51 reduce the nitrate into nitrogen by utilizing the organic carbon in the sewage under the anoxic condition, the organic load is reduced while the nitrogen is removed, the alkalinity of the subsequent nitration reaction is supplemented, meanwhile, part of suspended pollutants are adsorbed and decomposed, and the biodegradability of the sewage is improved. Then the sewage enters an O tank 52 through plug flow, the residual organic matters are further degraded under aerobic conditions, meanwhile, the nitrifying bacteria oxidize ammonia nitrogen in the sewage into nitrate nitrogen, and then the nitrate nitrogen flows back to the A tank 51 to be subjected to denitrification.

The ultrafiltration tube 6 is S-shaped, and the discharge tube 7 is connected to one end of the ultrafiltration tube 6. The sewage treated by the a/O reaction tank 5 flows out of the O tank 52, and then the sewage is ultrafiltered by the ultrafiltration tube 6 and discharged from the discharge pipe 7, and the discharged water can be directly discharged to a municipal drainage ditch or recycled.

The filter 1, the primary sedimentation tank 2, the anaerobic reactor 4 and the A/O reaction tank 5 are all connected with a sludge storage tank 10, one side of the sludge storage tank 10 is connected with a dehydrator 15, and one side of the dehydrator 15 is connected with an incinerator 16 for incinerating dehydrated sludge. Therefore, the sludge generated by sewage treatment in the filter 1, the primary sedimentation tank 2, the anaerobic reactor 4 and the A/O reaction tank 5 is concentrated and collected in the sludge storage tank 10, and then the sludge is dehydrated by the dehydrator 15 and burnt by the incinerator 16, so that the odor of the garbage percolate and the methane generated by fermentation are effectively removed, and simultaneously, the generated waste residue can be used as plant fertilizer, and the utilization rate of resources is improved.

The implementation principle of the embodiment is as follows:

the landfill leachate is treated by a filter 1, a primary sedimentation tank 2, an adjusting tank 3, an anaerobic reactor 4, an A/O reaction tank 5 and an ultrafiltration pipe 6 in sequence and then discharged from a discharge pipe 7, the odor of the landfill leachate and the biogas generated by anaerobic fermentation of the landfill leachate are intensively conveyed to an incineration chamber 8 through an induced draft fan 11 to be combusted, meanwhile, the sludge generated by sewage treatment of the primary sedimentation tank 2, the anaerobic reactor 4 and the A/O reaction tank 5 is intensively collected in a sludge storage tank 10 and is treated through a dehydrator 15 and an incinerator 16, so that the odor and the biogas are prevented from being directly discharged into the air, and adverse effects on the atmospheric environment and people are reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a nontoxic processing system of landfill leachate, its characterized in that is closed, including filter (1), primary sedimentation pond (2), equalizing basin (3), anaerobic reactor (4), AO reaction tank (5), ultrafiltration pipe (6), delivery pipe (7), incineration chamber (8) and air-blower (9), filter (1), primary sedimentation pond (2), equalizing basin (3), anaerobic reactor (4) are connected in series in proper order and all link to each other with incineration chamber (8), AO reaction tank (5) are connected between anaerobic reactor (4) and ultrafiltration pipe (6), air-blower (9) are connected in one side of AO reaction tank (5) with air input to AO reaction tank (5) in, the leachate is discharged from delivery pipe (7) after ultrafiltration pipe (6) are ultrafiltrated.

2. The non-toxic treatment system for landfill leachate according to claim 1, wherein an induced draft fan (11) is connected between the filter (1), the primary sedimentation tank (2), the adjusting tank (3) and the anaerobic reactor (4) and the incineration chamber (8).

3. The non-toxic treatment system for landfill leachate according to claim 1, further comprising a sludge storage tank (10), wherein the filter (1), the primary sedimentation tank (2), the anaerobic reactor (4) and the A/O reaction tank (5) are all connected to the sludge storage tank (10).

4. The non-toxic treatment system for landfill leachate according to claim 3, wherein one side of the sludge storage tank (10) is connected with a dewatering machine (15).

5. The non-toxic treatment system for landfill leachate according to claim 4, wherein one side of the dewatering machine (15) is connected with an incinerator (16) for incinerating dewatered sludge.

6. The nontoxic treatment system for landfill leachate according to claim 1, characterized in that one side of the anaerobic reactor (4) is connected with a biogas torch (12).

7. The non-toxic treatment system for landfill leachate according to claim 1, wherein one side of the anaerobic reactor (4) is connected with a circulation pipe (13).

8. The non-toxic landfill leachate treatment system according to claim 1, wherein a cooling tower (14) is connected to one side of the A/O reaction tank (5).