CN116081861A - Flexible treatment method for landfill leachate - Google Patents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a flexible treatment method for landfill leachate treatment, which comprises the following steps: the percolate enters an adjusting tank to adjust the PH value; then flows into the biological rotating disc unit to remove organic pollutants and nitrifying; automatically flowing into the bottom of the anoxic denitrification reaction tank to remove nitrate nitrogen and organic pollutants; automatically flowing into a short-cut nitrification reaction tank to convert part of ammonia nitrogen into nitrite nitrogen; the wastewater enters an anaerobic ammonia oxidation reaction tank to convert ammonia nitrogen and nitrate nitrogen into nitrogen; automatically flowing into a primary coagulating sedimentation tank; the wastewater enters a Fenton-persulfate catalytic oxidation pond to degrade organic pollutants in the wastewater; entering an ozone catalytic oxidation reaction tank, and treating organic pollutants by utilizing ozone; and (3) entering a secondary coagulating sedimentation tank, and sequentially using activated carbon for adsorption and coagulant for precipitation separation, thereby obtaining treated effluent. The wastewater can also pass through the coagulation air floatation unit according to the water quality characteristics. The invention can flexibly integrate the percolate according to the water quality characteristics and the treatment requirements to form the flexible treatment process method.
Description
Technical Field
The invention belongs to the field of environmental pollution treatment, and particularly relates to a flexible treatment method of aged leachate/household garbage and kitchen garbage mixed leachate of a household garbage landfill.
Background
The aged percolate generated by sanitary landfill (or landfill of sealed site) contains organic matter with low concentration, but most of the substances are biodegradable, and contain a large amount of biodegradable components such as humic acid and fulvic acid, and BOD 5 /COD cr Low, very poor biodegradability; meanwhile, the concentration of ammonia nitrogen in the percolate is high and is 1000-5000 mg.L -1 Between them; the salinity is high, the content of toxic substances such as heavy metal ions is high, and the heavy metal ions are enriched in the aged leachate after long-time accumulation, so that the environmental impact is great. A large amount of additional carbon source is needed in the traditional denitrification process, and the treatment efficiency is low and the cost is high. The prior treatment technology of the landfill leachate mainly comprises a multistage anoxic-aerobic biochemical-membrane biological reaction tank, and the advanced treatment adopts an ultrafiltration-reverse osmosis or nanofiltration process method. Although the process method obtains better effluent quality, the process methodThe process is complex, the added carbon source amount is large, the microfiltration membrane used in the membrane biological reaction tank, the ultrafiltration membrane used in the ultrafiltration stage and the reverse osmosis membrane have high pollution resistance requirements and short service life. The reverse osmosis stage can produce more concentrated liquor which is very difficult to process, and the evaporation treatment method can reach the relevant emission standard. The conventional process has the disadvantages of high investment cost, high treatment cost and complex facilities and operation management.
Therefore, it is particularly important to develop a flexible treatment process method suitable for treating aged leachate/household garbage and kitchen garbage mixed leachate of a household garbage landfill.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a flexible treatment method suitable for aged (especially sealed) landfill leachate of household garbage or mixed leachate of household garbage and kitchen garbage. The method combines advanced biomembrane anoxic denitrification-biomembrane shortcut nitrification-biomembrane anaerobic ammonia oxidation technology with multistage efficient catalytic oxidation technology, does not adopt membrane treatment technology, effectively removes COD, nitrogen and phosphorus pollutants and heavy metals in the percolate, and is suitable for treatment of low-organic-matter-concentration, high-ammonia-nitrogen-concentration and difficultly biodegradable aged percolate and treatment of oily mixed percolate.
A flexible treatment method for landfill leachate treatment, the treatment method utilizing a wastewater treatment system comprising the following units: the device comprises an adjusting tank, a biological rotating disc unit, an anoxic denitrification reaction tank, a short-cut nitrification reaction tank, an anaerobic ammonia oxidation reaction tank, a primary coagulating sedimentation tank, a Fenton-persulfate catalytic oxidation reaction tank, an ozone catalytic oxidation reaction tank and a secondary coagulating sedimentation tank;
the method comprises the following steps:
step one: pumping the percolate into a regulating tank, regulating the pH value of water, and keeping the percolate in the regulating tank for more than 48 hours; the pH value of the effluent is controlled to be 7-9;
step two: the wastewater discharged from the water outlet at the bottom of the self-regulating tank enters the biological rotating disc unit through a pipeline so as to remove organic pollutants and nitrification of percolate, and the wastewater is positioned on the biological rotating discThe contact time of the oxidation tank in the unit is not less than 6 hours, and the hydraulic load of the surface of the disc is not more than 0.08m 3 /(m 3 D) a step of (d); COD in the wastewater passes through the biological rotating disc unit cr The removal rate is 20-30%, and the degradation rate of ammonia nitrogen is 60-80%;
step three: wastewater discharged from a water outlet of the biological rotating disc unit automatically flows into the bottom of the anoxic denitrification reaction tank through a pipeline so as to remove nitrate nitrogen and organic pollutants in the effluent from the biological rotating disc unit; the hydraulic retention time of the anoxic denitrification reaction tank is more than 3d, and the dissolved oxygen is controlled to be less than 0.5mg/L; COD of the anoxic denitrification reaction tank cr The removal rate is 60%, and the TN removal rate is 60% -70%;
step four: the wastewater discharged from the anoxic denitrification reaction tank automatically flows into a short-cut nitrification reaction tank, the hydraulic retention time of the short-cut nitrification reaction tank is controlled to be 2-3d, and the wastewater is used for converting residual unconverted ammonia nitrogen in the effluent of the anoxic denitrification reaction tank into nitrous acid nitrogen;
step five: the wastewater discharged from the short-cut nitrification reaction tank automatically flows into the bottom of the anaerobic ammonia oxidation reaction tank and is used for converting ammonia nitrogen and nitrate nitrogen in the wastewater into nitrogen under the anaerobic condition; the hydraulic retention time in the anaerobic ammonia oxidation reaction tank is more than 3d, the total nitrogen removal rate reaches 90% through the anaerobic ammonia oxidation reaction tank, and the COD is achieved cr The removal rate reaches 70%;
step six: the wastewater discharged from the anaerobic ammonia oxidation reaction tank automatically flows into a primary coagulating sedimentation tank; the coagulation reaction time is more than 20 minutes, and the surface load of the sedimentation tank of the primary coagulation sedimentation tank is less than 0.5m 3 /(m 2 .h)；
Step seven: the wastewater discharged from the primary coagulating sedimentation tank automatically flows into a Fenton-persulfate catalytic oxidation tank, and organic pollutants in the wastewater are degraded by utilizing a Fenton and persulfate composite oxidation technology;
step eight: wastewater discharged from the Fenton-persulfate catalytic oxidation pond enters an ozone catalytic oxidation reaction pond, and the leachate is subjected to ozone catalytic oxidation to treat refractory organic pollutants; the ozone source adopts an oxygen source or an air source;
step nine: and (3) the wastewater discharged from the ozone catalytic oxidation reaction tank enters a secondary coagulation sedimentation tank for secondary coagulation and sedimentation, and finally water meeting the requirements is discharged through a water outlet, and sludge precipitated at the bottom is discharged through a sludge discharge outlet.
Further, the flexible treatment method is suitable for treatment of aged leachate of a landfill site; COD of the percolate inlet water cr 2000-3000mg/L, ammonia nitrogen concentration 500-1000mg/L; the treated effluent meets the following conditions: COD (chemical oxygen demand) cr Less than or equal to 100mg/L, less than or equal to 25mg/L of ammonia nitrogen, less than or equal to 40mg/L of total nitrogen and less than or equal to 3mg/L of total phosphorus.
Further, the flexible treatment method is suitable for treating mixed leachate of household garbage and kitchen garbage; COD of the mixed percolate inlet water cr 8000-15000mg/L, and ammonia nitrogen concentration 500-1000mg/L; the treated effluent meets the following conditions: COD (chemical oxygen demand) cr Less than or equal to 500mg/L, less than or equal to 400mg/L of Suspended Substances (SS), less than or equal to 35mg/L of ammonia nitrogen, less than or equal to 70mg/L of total nitrogen, and less than or equal to 3mg/L of total phosphorus.
When the mixed percolate of the household garbage and the kitchen garbage is treated, the wastewater treatment system further comprises a coagulation air floatation tank which is respectively communicated with the regulating tank and the biological turntable unit through pipelines; after executing the first step, the method further comprises:
the water from the regulating tank enters a coagulation air floatation tank through a pipeline, the coagulation air floatation tank comprises a coagulation reaction zone, a contact zone and an air floatation tank separation zone, the water from the regulating tank is firstly mixed and reacted with added 100-500mg/L of polymeric ferric chloride and 3-5mg/L of polyacrylamide coagulant in the coagulation reaction zone, then enters the contact zone from the bottom, is contacted with dissolved air and water in a mixing manner, overflows, and then overflows into the air floatation tank separation zone positioned at the upper part of the contact zone; thereby removing suspended matters, colloid pollutants and grease in the wastewater; the concentration of the animal and vegetable oil discharged from the coagulation floatation tank is reduced to below 50mg/L, and the concentration of suspended matters is reduced to below 100 mg/L.
Further, the biological rotating disk unit has an organic pollutant (COD) removing the percolate cr ) And nitrification. The biological rotating disc unit comprises a plurality of axially arranged discs and oxidation tanks, wherein the discs are arranged betweenThe middle shaft is connected with a fixed long screw rod, and the submerged depth of the disc is less than 1/2. The disc adopts porous corrugated plates with the corrugated height of 1-3cm, the corrugations between two adjacent porous corrugated plates are obliquely staggered, the corrugated plates are made of stainless steel or PP and PVC plastic materials, the void ratio of the combined integrated biological rotating disc unit is more than 95%, and the specific surface area is more than 250m 2 /m 3 . The diameter of the disc of the biological rotating disc unit can be designed and selected according to the water treatment amount, and the diameter specification range is as follows: d=1-2.5 m. The biological rotating disc unit is driven by a low-speed motor, and the rotating speed of the rotating disc is controlled to be 2-4rpm.
Further, the anoxic denitrification reaction tank, the short-cut nitrification reaction tank and the anaerobic ammoxidation reaction tank are filled with suspended ball fillers, the fillers are hollow balls with the diameters of 80-100mm, the filling volume ratio of the reaction tank is 40-60%, spiral fiber biomembranes are attached to the surfaces of the suspended ball fillers, and the attachable specific surface area is larger than 4000m 2 /m 3 The void fraction is greater than 95%.
Furthermore, a reflux liquid port is further formed in the bottom of the anaerobic ammonia oxidation reaction tank unit, the reflux liquid port is communicated with a reflux pump through a pipeline, the other end of the reflux pump is connected with the anoxic denitrification reaction tank through a pipeline, and reflux mixed liquid is sent to an inlet of the anoxic denitrification reaction tank, and the internal reflux ratio is 50% -100%.
Further, the bottoms of the primary coagulating sedimentation tank and the secondary coagulating sedimentation tank are respectively provided with a sludge discharge outlet for discharging sludge deposited at the bottom, and sludge is mechanically dehydrated and dried to form a sludge cake for outward transportation.
Furthermore, the primary coagulating sedimentation tank, the Fenton-persulfate catalytic oxidation tank and the secondary coagulating sedimentation tank are respectively provided with a stirrer for quickly mixing the medicament with suspended matters in the sewage so as to facilitate the quick sedimentation of the suspended matters.
Further, the coagulant is 1-5g/L of polymeric ferric chloride, and the coagulant aid is 3-5mg/L of polyacrylamide.
The invention has the advantages and the beneficial effects that:
1. the invention adopts a unit combination mode, and forms a flexible treatment method aiming at the water quality characteristics of the aged (or sealed) percolate of the household garbage landfill and the mixed percolate of the household garbage and the kitchen garbage, namely, the aged percolate of the aged (especially sealed) household garbage landfill is combined by adopting novel biochemical and physicochemical combination and advanced anoxic denitrification-short-cut nitrification-anaerobic ammoxidation-multistage chemical oxidation technologies; aiming at the treatment of the mixed percolate of the household garbage and the kitchen garbage, a coagulation air floatation tank unit is added on the basis of the method so as to remove grease. Thereby flexibly processing the water quality characteristics;
2. the invention does not adopt membrane separation technology to treat landfill leachate; the main body composition form of the treatment method is as follows: the method comprises the steps of a regulating tank, a biological rotating disc, an anoxic denitrification reactor, a short-cut nitrification reactor, an anaerobic ammonia oxidation reactor, a primary coagulation sedimentation tank, a Fenton-persulfate composite catalytic oxidation reactor, an ozone catalytic oxidation reactor and a secondary coagulation sedimentation tank;
3. and adding suspended ball filler with spiral fiber biomembrane attached to the outer surface into the anoxic denitrification reaction tank, the short-cut nitrification reaction tank and the anaerobic ammoxidation reaction tank to form the efficient biomembrane reactor.
Drawings
FIG. 1a is a schematic diagram of a treatment system suitable for treatment of aged (or closed-site) leachate in a landfill according to example 1; FIG. 1b is a schematic diagram of a treatment system for mixed leachate of household garbage and kitchen garbage according to example 2;
fig. 2a is a flow chart of a treatment method for aged (or sealed) leachate of a household garbage landfill according to example 1, and fig. 2b is a flow chart of a treatment method for mixed leachate of household garbage and kitchen garbage according to example 2.
Wherein:
1: regulating tank
2: coagulation air floatation tank
3: biological rotating disc unit with oblique staggered corrugated plates
4: anoxic denitrification reaction tank
5: short-cut nitrification reaction tank
6: anaerobic ammoxidation reaction tank
7: disposable coagulating sedimentation tank
8: fenton-persulfate catalytic oxidation reaction tank
9: ozone catalytic oxidation reaction tank
10: adsorption reaction tank
11: secondary sedimentation tank
12: reflux pump
13: lifting water pump
14: water inlet pump
15: blower fan
16: mixer
17: packing material
18: flowmeter for measuring flow rate
19: motor with a motor housing
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples. The examples of the present invention are intended to provide a better understanding of the present invention to those skilled in the art, and are not intended to limit the present invention in any way. The workflow and working principle of the present invention will be further described with a preferred embodiment of the present invention.
Example 1: aged leachate of household garbage landfill
The embodiment is suitable for treating the aged (or sealed) percolate of the household garbage landfill. COD of the percolate inlet water cr 2000-3000mg/L, ammonia nitrogen concentration 500-1000mg/L; the treated effluent can meet the standard requirements of the pollution control Standard for domestic refuse landfill (GB/T16889-2008), the COD is less than or equal to 100mg/L, the ammonia nitrogen is less than or equal to 25mg/L, the total nitrogen is less than or equal to 40mg/L, and the total phosphorus is less than or equal to 3mg/L.
A flexible treatment method suitable for treating aged (or sealed) percolate of a household refuse landfill, which specifically comprises the following units shown in figure 1 a: the device comprises an adjusting tank 1, an oblique staggered corrugated plate biological rotating disc unit 3, an anoxic denitrification reaction tank 4, a short-cut nitrification reaction tank 5, an anaerobic ammonia oxidation reaction tank 6, a primary coagulating sedimentation tank 7, a Fenton-persulfate catalytic oxidation reaction tank 8, an ozone catalytic oxidation reaction tank 9, an adsorption reaction tank 10 and a secondary sedimentation tank 11 which are connected in sequence; the arrows in the figure show the direction of water flow.
As shown in fig. 2a, the specific processing steps are as follows:
step one: pumping percolate of an aged household garbage landfill into a regulating tank 1, setting aeration stirring equipment in the regulating tank, keeping the percolate in the regulating tank 1 for more than 48 hours, and continuously or intermittently stirring the regulating tank 1 by using a stirrer so as to regulate the pH value of wastewater in the regulating tank, wherein the pH value of effluent is controlled to be 7-9;
step two: the water from the regulating tank 1 flows through a lifting water pump 13 through a pipeline, flows through a flowmeter 18 and flows into the oblique corrugated plate biological rotating disc unit 3;
the reaction tank of the oblique corrugated plate biological rotating disc unit 3 has the function of removing organic pollutants (COD) of percolate cr ) And nitrification. The biological rotating disc unit 3 comprises a plurality of axially arranged discs and oxidation tanks, the discs are connected by adopting a central shaft and a fixed long screw rod, the submerged depth of the discs is less than 1/2, and the water level of the biological rotating disc unit is higher than the water level of the anoxic denitrification reaction tank 4. The disc adopts porous corrugated plates with the corrugated height of 1-3cm, the corrugations between two adjacent porous corrugated plates are obliquely staggered, the corrugated plates are made of stainless steel or PP and PVC plastic materials, the void ratio of the combined integrated oblique staggered corrugated plate biological turntable unit is more than 95%, and the specific surface area is more than 250m 2 /m 3 . The diameter of the disc of the biological rotating disc unit can be designed and selected according to the water treatment amount, and the diameter specification range is as follows: d=1-2.5 m. The contact time of the wastewater in the oxidation tank is not less than 6 hours, and the hydraulic load of the surface of the disc is not more than 0.08m 3 /(m 3 D) a step of. The oxidation tank of the biological rotating disc is made of glass fiber reinforced plastic or stainless steel. And inoculating the denitrifying bacteria agent when the biological rotating disc is started.
The CODcr removal rate of the biological rotating disc unit 3 through the oblique corrugated plates is about 20% -30%, and the degradation rate of ammonia nitrogen is about 80% -90%; when the biological rotating disc unit domesticates strains, and when the biological rotating disc unit is used for treating percolate of a landfill site of aged household garbage, the biological rotating disc unit 3 is started to be inoculated with a denitrifying bacteria agent, the rotating speed is 2-4rpm, and the system is stable after the biological rotating disc unit continuously runs for 3 months.
Aiming at aged percolate, main working condition parameters of the biological rotating disc 3-test experiment stage biochemical system comprise:
high-efficient biological rotating disc: area hydraulic load of biological rotating disc: 0.04-0.06m 3/(m 2. D);
COD load 0.3-0.5kg COD/(m 2. D);
ammonia nitrogen load: 28-45g NH3-N/(m 2. D);
the hydraulic retention time of the oxidation tank is 10-16h.
Step three: wastewater discharged from the water outlet of the self-skew corrugated plate biological rotating disc unit 3 in a self-flowing mode enters a water inlet at the bottom of the anoxic denitrification reaction tank 4 through a pipeline;
the anoxic denitrification reaction tank 4 has the main function of removing nitrate nitrogen and organic pollutants in the effluent from the biological rotating disc unit. The reaction tank is in an open structure, and is divided into a water distribution area at the bottom and a suspension ball filler area at the upper part of the water distribution area from bottom to top, wherein a water inlet of the anoxic denitrification reaction tank 4 is positioned at the bottom of the reaction tank, so that wastewater is in a movement state from bottom to top; the water outlet is provided with a filler interception grid, and the water outlet is positioned on the wall which is 0.2m below the water surface and is connected with the short-cut nitrification tank 5. The suspended ball filler area is filled with suspended ball filler, the filler 17 is hollow sphere with the diameter of 80-100mm, the filling volume ratio of the reaction tank is 40-60%, the spiral fiber biomembrane is attached to the surface of the suspended ball filler, and the attachable specific surface area is larger than 6000m 2 /m 3 The void fraction is greater than 95%. The hydraulic retention time of the anoxic denitrification reaction tank 4 is more than 3d, and the dissolved oxygen is controlled to be less than 0.5mg/L. The amount of additional carbon source is calculated according to the actual value of the carbon-nitrogen ratio of the inlet water, and the carbon-nitrogen ratio is generally required to be controlled to be larger than 4. COD passes through the anoxic denitrification reaction tank 4 cr The removal rate is about 60%, and the TN removal rate is about 60% -70%;
step four: the wastewater automatically flows into the short-cut nitrification reaction tank 5 from an opening arranged on a partition wall which is in butt joint with the short-cut nitrification reaction tank 5;
the short-cut nitrification reaction tank 5 has the main function of converting the effluent of the anoxic denitrification reaction tank 4The remaining ammonia nitrogen of the water is nitrite nitrogen. The reaction tank is formed by adopting a complete mixing reaction tank, a filler interception grid is arranged at the outlet of the water outlet, and an opening on a partition wall where the anoxic denitrification reaction tank 4 and the shortcut nitrification reaction tank 5 are in butt joint is positioned at a position of 0.2m below the water surface. The reaction tank is filled with the same suspended ball filler as that in the anoxic denitrification reaction tank, the filling volume ratio of the filler in the reaction tank is 40-60%, the spiral fiber biomembrane is attached to the outer surface of the suspended ball filler, and the attachable specific surface area is more than 4000m 2 /m 3 The void fraction is greater than 95%. The bottom of the short-cut nitrification reaction tank 5 is provided with a microporous aerator which is connected with a blower 15 positioned outside the reaction tank and used for supplying oxygen and controlling the concentration of dissolved oxygen to be 1-2mg/L. The hydraulic retention time of the short-cut nitrification reaction tank 5 is controlled to be 2-3d. The concentration of ammonia nitrogen and nitrate nitrogen in water is detected on line, the blast aeration quantity is regulated, and the concentration of dissolved oxygen is controlled to be 1-2mg/L. And dissolved oxygen, ORP and nitrate on-line monitors are also arranged in the short-cut nitrification reaction tank 5, and the air supply quantity and the dissolved oxygen are controlled in a feedback manner according to the numerical value monitored by the monitors. The short-cut nitrification reaction tank 5 converts the residual unconverted ammonia nitrogen into nitrous acid nitrogen with a conversion rate of about 50%;
step five: the wastewater automatically flows into the bottom of the anaerobic ammonia oxidation reaction tank 6 from an opening arranged on a partition wall of the short-cut nitrification reaction tank 5 and the anaerobic ammonia oxidation reaction tank 6; the opening on the abutting wall of the short-cut nitrification reaction tank 5 and the anaerobic ammonia oxidation reaction tank 6 is positioned at the bottom. The anaerobic ammonia oxidation reaction tank 6 converts ammonia nitrogen and nitrate nitrogen into nitrogen under anaerobic conditions. The anaerobic ammonia oxidation reaction tank adopts an up-flow hydraulic design, and no stirring equipment is arranged. The reaction tank is of a sealing structure and is divided into a bottom water distribution area, a middle suspended filler reaction area and an upper clear water area, wherein a water inlet is formed in the bottom of the reaction tank, so that wastewater moves from bottom to top and passes through the suspended filler reaction area in an upflow mode; the anaerobic ammonia oxidation reaction tank 6 is started to run and is inoculated with anaerobic ammonia oxidation bacteria (anaerobic ammonia oxidation sludge). The anaerobic ammonia oxidation reaction tank is filled with the same suspended ball filler as the anaerobic denitrification reaction tank, the diameter of the hollow ball is 80-100mm, and the filling volume ratio of the filler in the reaction tank is 40%60 percent of the specific surface area of the spiral fiber biomembrane attached to the outer surface of the suspension ball filler is more than 4000m 2 /m 3 The void fraction is greater than 95%. The hydraulic retention time of the anaerobic ammoxidation reaction tank is more than 3d. The bottom of the anaerobic ammonia oxidation reaction tank 6 is also provided with a reflux liquid port which is communicated with a reflux pump 12 through a pipeline, and the reflux mixed liquid is sent to the inlet of the anoxic denitrification reaction tank 4, and the internal reflux ratio is 50-100%. Through the anaerobic ammonia oxidation reaction tank, the total nitrogen removal rate reaches about 90%, and the COD removal rate reaches about 70%.
Step six: the wastewater enters a primary coagulating sedimentation tank 7 from an opening arranged on the partition wall of the anaerobic ammonia oxidation reaction tank 6 and the primary coagulating sedimentation tank 7; the opening on the partition wall where the anaerobic ammonia oxidation reaction tank 6 and the primary coagulating sedimentation tank 7 are abutted is positioned below the water surface by 0.2m.
The primary coagulation sedimentation tank 7 is an inclined tube sedimentation tank and comprises a coagulation reaction tank and a sedimentation tank which are communicated; the water at the outlet of the anaerobic ammonia oxidation reaction tank 6 firstly enters a coagulation reaction tank, and coagulant aid are added into the coagulation reaction tank; the coagulant adopts 1-5g/L polymeric ferric chloride, and the coagulant aid adopts 3-5mg/L polyacrylamide. The coagulation reaction tank is internally provided with a stirrer 16, the rotation speed of a stirring impeller of the stirrer is 50-100rpm, so that the medicament and suspended matters in sewage are quickly mixed, and sludge is used as a core to form larger and heavier flocs so as to be beneficial to quick sedimentation in a sedimentation tank, and the sedimentation tank is an inclined plate sedimentation tank. The coagulation reaction time is more than 20 minutes, and the surface load of the sedimentation tank is less than 0.5m 3 /(m 2 H) the method comprises the following steps of. The sedimentation tank is filled with honeycomb inclined tube, a wastewater distribution area is arranged below the inclined tube, and a sludge area is arranged below the water distribution area; the wall that once coagulative precipitation tank and sedimentation tank butt is equipped with the opening of intercommunication two, and the opening is located 0.2m below the surface of water department, prevents that the floater from being taken away. In the step, the removal rate of suspended matters in wastewater by coagulating sedimentation is more than 70%, and the removal rate of CODcr is more than 50%. The bottom of the primary coagulating sedimentation tank 7 is also provided with a sludge discharge outlet for discharging sludge deposited at the bottom, and sludge is mechanically dehydrated and dried to form a sludge cake for outward transportation; the liquid produced by dehydration can also be returned to the hypoxiaThe denitrification reaction tank 4 carries out the re-reaction. A pipeline is arranged at the water outlet weir of the sedimentation tank of the primary coagulating sedimentation tank 7, and the other end of the pipeline reaches the bottom of the Fenton-persulfate catalytic oxidation tank 8.
Step seven: the wastewater enters a Fenton-persulfate catalytic oxidation pond 8 from an effluent weir of the primary coagulating sedimentation pond 7:
fenton-persulfate catalytic oxidation pond utilizes Fenton and persulfate composite oxidation technique to degrade organic pollutant in the leachate. The oxidation tank is designed into a multistage continuous mixing-reaction mode, the Fenton-persulfate catalytic oxidation tank is made of glass fiber reinforced plastic or engineering plastic structural materials, and a stirrer 16 is arranged in the reaction tank for stirring, and the rotating speed is 50-100 rpm. According to the water quality concentration and the treatment requirement, the small test is carried out to determine that 500-800 mg/L hydrogen peroxide, 1-1.5 g/L activated persulfate and 0.5-0.8 g/L ferrous sulfate catalyst are added, fenton catalytic oxidation reaction is carried out firstly, and then persulfate oxidation reaction is carried out; the CODcr removal rate through the catalytic oxidation tank was about 70%.
Step eight: the wastewater enters the ozone catalytic oxidation reaction tank 9 from openings arranged on partition walls of the Fenton-persulfate catalytic oxidation tank 8 and the ozone catalytic oxidation reaction tank 9: the opening on the wall where the Fenton-persulfate catalytic oxidation tank 8 and the ozone catalytic oxidation reaction tank 9 are abutted is located at 0.2m below the water surface. The ozone catalytic oxidation reaction tank 9 comprises an ozone aeration zone positioned at the bottom, a catalytic reaction zone positioned at the middle part and a clear water zone positioned at the upper part, and the ozone catalytic oxidation reaction tank 9 utilizes ozone catalytic oxidation percolate to treat refractory organic pollutants. The ozone source can be an oxygen source or an air source. The ozone catalytic oxidation reaction tank 9 is designed to be up-flow (can be in a multi-format according to actual needs), and ozone prepared by the ozone generating system is filled into water in the ozone aeration area through a microporous aeration or jet aeration mode.
Step nine: the wastewater enters the secondary coagulating sedimentation tank from an opening arranged on a partition wall of the ozone catalytic oxidation reaction tank 9 and the secondary coagulating sedimentation tank, and the opening on the wall of the secondary coagulating sedimentation tank, which is abutted to the ozone catalytic oxidation reaction tank 9, is positioned at the bottom. The secondary coagulating sedimentation tank comprises an adsorption reaction tank 10 and a secondary sedimentation tank 11 which are communicated, and an opening for communication is formed in the wall, which is abutted against the adsorption reaction tank 10 and the secondary sedimentation tank 11; the effluent from the ozone catalytic oxidation reaction tank 9 firstly enters an adsorption reaction tank 10, the adsorption reaction tank 10 combines powder activated carbon adsorption with coagulation reaction, the aim of deeply removing organic pollutants in water is fulfilled, the powder activated carbon is firstly put into the adsorption reaction for 1 hour according to the concentration of 50-100mg/L, then coagulant and coagulant aid are put into the adsorption reaction tank for reaction for 15 minutes (the coagulant adopts 1-5g/L of polymeric ferric chloride, the coagulant aid adopts 3-5mg/L of polyacrylamide), and the organic pollutants in water are further removed through precipitation separation; the outlet of the adsorption reaction tank 10 is positioned at the position 0.2m below the water surface, the effluent automatically flows into the inlet at the bottom of the secondary sedimentation tank 11, the secondary sedimentation tank 11 is an inclined plate sedimentation tank, and a coagulation sedimentation method is further used for removing suspended matters in the water; a triangular overflow weir is arranged at the water outlet of the secondary sedimentation tank, and finally, the discharged water after sedimentation and separation is collected by a water outlet area; the bottom of the secondary sedimentation tank 11 is provided with a sludge discharge outlet for discharging sludge deposited at the bottom, and the sludge is mechanically dehydrated and dried between sludge treatments and then is sent to a landfill site for landfill. Finally, the effluent meets the standard requirement that the effluent meets the domestic garbage landfill pollution control standard (GB 16889-2008).
Example 2: is suitable for mixed percolate of household garbage and kitchen garbage
The embodiment is suitable for treating the mixed leachate of the household garbage and the kitchen garbage. COD of the mixed percolate inlet water cr 8000-15000mg/L, and ammonia nitrogen concentration 500-1000mg/L. The effluent reaches the water quality standard of sewage discharged into town sewer
(GBT 31962-2015) standard requirement, main index COD cr Less than or equal to 500mg/L, less than or equal to 400mg/L of Suspended Substances (SS), less than or equal to 35mg/L of ammonia nitrogen, less than or equal to 70mg/L of total nitrogen, and less than or equal to 3mg/L of total phosphorus.
A flexible treatment method suitable for mixed leachate of household garbage and kitchen garbage, as shown in fig. 1b, specifically comprises the following steps: the device comprises an adjusting tank 1, a coagulation air floatation tank 2, an oblique staggered corrugated plate biological turntable unit 3, an anoxic denitrification reaction tank 4, a short-cut nitrification reaction tank 5, an anaerobic ammonia oxidation reaction tank 6, a primary coagulation sedimentation tank 7, a Fenton-persulfate catalytic oxidation reaction tank 8, an ozone catalytic oxidation reaction tank 9, an adsorption reaction tank 10 and a secondary sedimentation tank 11 which are connected in sequence; the components are communicated through pipelines.
The processing steps are similar to those of embodiment 1, and as shown in fig. 2b, only the differences are described below, and the same parts will not be repeated.
In this example, the process unit differs from example 1 in that a coagulation floatation tank 2 is added after the conditioning tank and before the anoxic denitrification tank.
The coagulation air floatation tank 2 comprises a coagulation reaction area, a contact area and an air floatation tank separation area, wherein water from the regulating tank flows through a lifting water pump through a pipeline, flows into the coagulation reaction area of the coagulation air floatation tank through a flowmeter 18, and is mixed and reacted with 100-500mg/L of added polymeric ferric chloride and 3-5mg/L of polyacrylamide coagulant. The effluent from the reaction zone enters the bottom of the contact zone to be mixed and contacted with dissolved air and water, and overflows into an air floatation tank separation zone positioned at the upper part of the contact zone, so that suspended matters, colloidal pollutants and grease in the wastewater are removed. Clear water collecting pipe at the bottom of the separation zone, and clear water is discharged from the bottom. The upper part of the separation area is provided with a slag scraping machine, and the tail end of the separation area is provided with a slag collecting groove. The concentration of the liquid effluent animal and vegetable oil passing through the coagulation floatation tank is reduced to below 50mg/L, and the concentration of suspended matters is reduced to below 100 mg/L; the water discharged from the coagulation air floatation tank 2 flows into or is pumped into the inclined cross corrugated plate biological rotating disc unit 3. The effluent of the biological rotating disc unit 3 with the oblique staggered corrugated plates flows into the anoxic denitrification reaction tank 4.
When the biological rotating disc unit is used for domesticating strains, and when the mixed percolate is treated, the biological rotating disc unit is used for inoculating denitrifying bacteria agent when being started, the rotating speed is 2-4rpm, and the system is stable after the biological rotating disc unit continuously runs for 1 month;
main working condition parameters of main body unit control in test experiment stage aiming at mixed percolate
Coagulation floatation tank: hydraulic retention time is 1h, and dissolved air water reflux ratio is 30%;
high-efficiency biological rotating disc 3: area hydraulic load of biological rotating disc: 0.02-0.05m 3/(m 2. D);
COD load 0.3-0.5kg COD/(m 2. D);
ammonia nitrogen load: 10-30g NH3-N/(m 2. D);
the hydraulic retention time of the oxidation tank is 10-16h.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended to enable those skilled in the art to understand the content of the present invention and to implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention are still within the scope of the present invention.
Claims (8)
1. A flexible treatment method for landfill leachate treatment, characterized in that the treatment method utilizes a wastewater treatment system comprising the following units: the device comprises an adjusting tank, a biological rotating disc unit, an anoxic denitrification reaction tank, a short-cut nitrification reaction tank, an anaerobic ammonia oxidation reaction tank, a primary coagulating sedimentation tank, a Fenton-persulfate catalytic oxidation reaction tank, an ozone catalytic oxidation reaction tank and a secondary coagulating sedimentation tank; the method comprises the following steps:
step one: pumping the percolate into a regulating tank (1), regulating the pH value of water, and keeping the percolate in the regulating tank for more than 48 hours; the pH value of the effluent is controlled to be 7-9;
step two: the wastewater discharged from the water outlet at the bottom of the self-regulating tank flows into the biological rotating disc unit (3) through a pipeline so as to remove organic pollutants and nitrification of percolate, the contact time of the wastewater in an oxidation tank in the biological rotating disc unit (3) is not less than 6 hours, and the hydraulic load on the surface of a disc is not more than 0.08m 3 /(m 3 D) a step of (d); COD in the wastewater passes through the biological rotating disc unit cr The removal rate is 20-30%, and the degradation rate of ammonia nitrogen is 60-80%;
step three: wastewater discharged from a water outlet of the biological rotating disc unit (3) automatically flows into the bottom of the anoxic denitrification reaction tank (4) through a pipeline so as to remove nitrate nitrogen and organic pollutants in the effluent from the biological rotating disc unit; the hydraulic retention time of the anoxic denitrification reaction tank (4) is more than 3d, and the dissolved oxygen is controlled to be less than 0.5mg/L; COD of the anoxic denitrification reaction tank (4) cr The removal rate is 60%, TThe removal rate of N is 60% -70%;
step four: the wastewater automatically flows into the short-cut nitrification reaction tank (5) from an opening arranged on a partition wall of the anoxic denitrification reaction tank (4) and the short-cut nitrification reaction tank (5) and is used for converting residual unconverted ammonia nitrogen in the effluent of the anoxic denitrification reaction tank (4) into nitrous acid nitrogen; a microporous aerator for supplying oxygen is arranged in the bottom gas distribution area of the short-cut nitrification reaction tank (5), and the concentration of dissolved oxygen is controlled to be 1-2mg/L; the hydraulic retention time of the short-cut nitrification reaction tank (5) is controlled to be 2-3d;
step five: the wastewater discharged from the short-cut nitrification reaction tank (5) automatically flows into the bottom of the anaerobic ammoxidation reaction tank (6) and is used for converting ammonia nitrogen and nitrate nitrogen in the wastewater into nitrogen under the anaerobic condition; the retention time of the water in the anaerobic ammonia oxidation reaction tank (6) is more than 3d, the total nitrogen removal rate reaches 90% through the anaerobic ammonia oxidation reaction tank (6), and the COD is achieved cr The removal rate reaches 70%;
step six: the wastewater discharged from the anaerobic ammonia oxidation reaction tank (6) automatically flows into a primary coagulating sedimentation tank (7); the coagulation reaction time is more than 20 minutes, and the surface load of a sedimentation tank of the primary coagulation sedimentation tank (7) is less than 0.5m 3 /(m 2 .h)；
Step seven: the wastewater discharged from the primary coagulating sedimentation tank (7) automatically flows into a Fenton-persulfate catalytic oxidation tank (8), and organic pollutants in the wastewater are degraded by utilizing a Fenton and persulfate composite oxidation technology;
step eight: waste water discharged from the Fenton-persulfate catalytic oxidation pond (8) enters an ozone catalytic oxidation reaction pond (9), and the leachate is subjected to ozone catalytic oxidation to treat refractory organic pollutants; the ozone source adopts an oxygen source or an air source;
step nine: the wastewater discharged from the ozone catalytic oxidation reaction tank (9) enters a secondary coagulation sedimentation tank (10) for secondary coagulation and sedimentation, and finally water meeting the requirements is discharged through a water outlet, and sludge precipitated at the bottom is discharged through a sludge discharge outlet.
2. A flexible treatment process for landfill leachate treatment according to claim 1, wherein the flexibility isThe treatment method is suitable for treating percolate in the landfill of aged household garbage; COD of the percolate inlet water cr 2000-3000mg/L, ammonia nitrogen concentration 500-1000mg/L; the treated effluent meets the following conditions: COD (chemical oxygen demand) cr Less than or equal to 100mg/L, less than or equal to 25mg/L of ammonia nitrogen, less than or equal to 40mg/L of total nitrogen and less than or equal to 3mg/L of total phosphorus.
3. The flexible treatment method for landfill leachate treatment according to claim 1, wherein the flexible treatment method is suitable for treatment of mixed leachate of household garbage and kitchen garbage; COD of the mixed percolate inlet water cr 8000-15000mg/L, and ammonia nitrogen concentration 500-1000mg/L; the treated effluent meets the following conditions: COD (chemical oxygen demand) cr Less than or equal to 500mg/L, less than or equal to 400mg/L of suspended matters, less than or equal to 35mg/L of ammonia nitrogen, less than or equal to 70mg/L of total nitrogen, less than or equal to 3mg/L of total phosphorus;
when the mixed percolate of the household garbage and the kitchen garbage is treated, the wastewater treatment system further comprises a coagulation air floatation tank (2), and the coagulation air floatation tank (2) is respectively communicated with the regulating tank (1) and the biological rotating disc unit (3) through pipelines; after executing the first step, the method further comprises:
the water from the regulating tank (1) enters the coagulation air floatation tank (2) through a pipeline, the coagulation air floatation tank (2) comprises a coagulation reaction zone, a contact zone and an air floatation tank separation zone, the water from the regulating tank is firstly mixed and reacted with added 100-500mg/L of polymeric ferric chloride and 3-5mg/L of polyacrylamide coagulant in the coagulation reaction zone, then enters the contact zone from the bottom, is mixed with dissolved air and water, contacts and overflows, and then overflows into the air floatation tank separation zone positioned at the upper part of the contact zone; thereby removing suspended matters, colloid pollutants and grease in the wastewater; the concentration of the animal and vegetable oil discharged from the coagulation floatation tank (2) is reduced to below 50mg/L, and the concentration of suspended matters is reduced to below 100 mg/L.
4. The flexible treatment method for landfill leachate treatment according to claim 1, wherein the anoxic denitrification reaction tank (4), the short-cut nitrification reaction tank (5) and the anaerobic ammoxidation reaction tank (6) are filled with suspended ball filler (17), the filler is hollow balls with the diameter of 80-100mm, and the filling volume ratio of the reaction tank is 40-60 percent, and the suspended balls are suspendedThe spiral fiber biomembrane is adhered to the outer surface of the ball filler, and the attachable specific surface area is more than 4000m 2 /m 3 The void fraction is greater than 95%.
5. The flexible treatment method for garbage leachate treatment according to claim 1, wherein a reflux liquid port is further arranged at the bottom of the anaerobic ammonia oxidation reaction tank (6), the reflux liquid port is communicated with a reflux pump (12) through a pipeline, the other end of the reflux pump (12) is connected with the anoxic denitrification reaction tank (4) through a pipeline, and reflux mixed liquid is sent to an inlet of the anoxic denitrification reaction tank (4) for filtering, and the internal reflux ratio is 50% -100%.
6. The flexible treatment method for landfill leachate treatment according to claim 1, wherein the bottoms of the primary coagulating sedimentation tank (7) and the secondary coagulating sedimentation tank are provided with a sludge discharge outlet for discharging sludge precipitated at the bottom.
7. The flexible treatment method for landfill leachate treatment according to claim 1, wherein the primary coagulation sedimentation tank (7), the Fenton-persulfate catalytic oxidation tank (8) and the secondary coagulation sedimentation tank are respectively provided with a stirrer (16) for rapidly mixing the medicament and suspended matters in the sewage.
8. The flexible treatment method for landfill leachate treatment according to claim 1, wherein the coagulant is 1-5g/L of polymeric ferric chloride, and the coagulant aid is 3-5mg/L of polyacrylamide.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010133177A1 (en) * | 2009-05-22 | 2010-11-25 | 上海同济建设科技有限公司 | Landfill leachate wastewater treatment system and process thereof |
| CN112661351A (en) * | 2020-12-09 | 2021-04-16 | 重庆杰润科技有限公司 | Biochemical-physical coupling advanced treatment system and method for kitchen waste fermentation wastewater or leachate |
| WO2022242040A1 (en) * | 2021-05-20 | 2022-11-24 | 北京工业大学 | Method and apparatus for treating mid-term and late landfill leachates by process combining endogenous denitrification and autotrophic nitrogen removal |
| CN219689523U (en) * | 2022-12-09 | 2023-09-15 | 天津市政工程设计研究总院有限公司 | Treatment device for aged leachate of household garbage landfill |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010133177A1 (en) * | 2009-05-22 | 2010-11-25 | 上海同济建设科技有限公司 | Landfill leachate wastewater treatment system and process thereof |
| CN112661351A (en) * | 2020-12-09 | 2021-04-16 | 重庆杰润科技有限公司 | Biochemical-physical coupling advanced treatment system and method for kitchen waste fermentation wastewater or leachate |
| WO2022242040A1 (en) * | 2021-05-20 | 2022-11-24 | 北京工业大学 | Method and apparatus for treating mid-term and late landfill leachates by process combining endogenous denitrification and autotrophic nitrogen removal |
| CN219689523U (en) * | 2022-12-09 | 2023-09-15 | 天津市政工程设计研究总院有限公司 | Treatment device for aged leachate of household garbage landfill |
Non-Patent Citations (1)
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| 吴莉娜;彭永臻;刘牡;宋燕杰;张树军;: "晚期垃圾渗滤液两级UASB-A/O-SBR工艺短程深度脱氮", 四川大学学报(工程科学版), no. 03, 20 May 2011 (2011-05-20) * |
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