CN110590079A - Method for treating landfill leachate sewage in full quantity by electron beam irradiation - 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
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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
- C02F1/72—Treatment of water, waste water, or sewage by 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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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Abstract
The invention discloses a method for treating landfill leachate sewage by electron beam irradiation, which comprises the following steps: (A) firstly, adding a polymer into the landfill leachate, and carrying out aeration pretreatment; (B) the garbage percolate after aeration pretreatment enters a mud-water separation device to remove suspended matters; (C) performing secondary A/O biochemical treatment on the landfill leachate after the removal of the suspended matters, and performing primary removal of carbon, nitrogen and phosphorus; (D) the landfill leachate after the secondary A/O biochemical treatment enters electron beam irradiation equipment for irradiation oxidation decomposition; (E) and (4) performing postbiochemical advanced treatment on the garbage percolate subjected to the irradiation oxidation decomposition to further remove pollutants in the garbage percolate. The invention has the advantages of no concentrated water recharge, low operation cost, low investment cost, complete decomposition of pollutants, no risk of newly-increased hazardous waste and salinity, and no need of adding disinfection equipment.
Description
Technical Field
The invention relates to the field of landfill leachate treatment, in particular to a method for treating landfill leachate sewage in a full-scale manner by electron beam irradiation.
Background
The landfill leachate is mainly produced from units such as landfill sites, garbage transfer stations, garbage incineration plants and the like, along with the improvement of the living standard of people, the generated domestic garbage is increased day by day, and the treatment of the landfill leachate is widely concerned by the society.
The landfill leachate has extremely high concentrations of pollutants such as COD, ammonia nitrogen, total phosphorus, chromaticity and the like, particularly, the ammonia nitrogen index basically reaches more than 1000mg/l, which is nearly 30 times of the concentration of the traditional domestic sewage, and the landfill leachate is not effectively treated and can greatly damage the surrounding environment. The garbage percolate has extremely high salinity, has great inhibition effect on biochemical treatment, invisibly increases the difficulty of sewage treatment, leads the garbage percolate sewage treatment station to be difficult to discharge after reaching the standard,
at present, the domestic landfill leachate treatment technology mostly adopts the biochemical treatment, ultrafiltration, nanofiltration and RO treatment processes, the biochemical treatment process adopts the traditional anoxic and aerobic treatment to remove part of C, N, P pollution indexes, the ultrafiltration process is mainly built-in or external, the main principle is that an ultrafiltration membrane separation device is used for intercepting active sludge and macromolecular organic matters in water, an ultrafiltration membrane component is used for replacing a traditional secondary sedimentation tank, the high active sludge concentration can be kept in a front-stage biochemical system, the active sludge (MLSS) concentration can be increased to 8000-10000 mg/L or even higher, the sludge age (SRT) can be prolonged to more than 30 days, and the biological treatment organic load is improved. Nanofiltration and RO membranes are separation processes that function to separate one species from another. The separation of the membrane is simply screening, namely, the separation of substances with different sizes is realized by utilizing the principle of mechanical screening of the pores on the surface of the membrane, so that the separation purpose is achieved. At present, most of membrane separation processes applied to the landfill leachate after ultrafiltration adopt nanofiltration and RO membrane separation technologies.
However, because the membrane separation process is only a pure physical separation process and adopts a concentration separation process, the water yield of nanofiltration is generally about 70%, and the water yield of RO reverse osmosis is also about 70%, so that the treated water yield is about 50% of the water inflow, and the membrane separation process is a non-full treatment process with large investment and small treatment capacity. Because the process is not a process for decomposing pollutants, the water discharged after reaching the standard is only clear water after membrane separation, and the other part of concentrated water can still be recharged to garbage dumps such as garbage landfills and the like, so that the concentration of sewage inlet water is higher and higher, the treatment difficulty is more and more difficult, especially the salinity of the raw water of the garbage percolate can play an accumulative effect, at present, for example, in large cities such as wide and deep in the north, the running time of the percolate sewage stations is longer, some salinity of the inlet water reaches over 20000mg/l, serious impact is generated on a biochemical system, and many states are close to paralysis states. And too high concentration of intaking, but greatly reduced membrane system life-span, some change one year, even more frequent, greatly increased the working costs. Moreover, the pollutants which can not be biochemically treated after membrane separation can be accumulated, and even if reverse osmosis RO separation is adopted, the emission reaching the standard is more and more difficult.
In recent years, advanced oxidation technology for treating landfill leachate sewage in full amount emerges, and the technology reduces pollution components by adding an oxidant, and is an oxidation process. Compared with the membrane separation process, the method has the advantages that the pollutant is oxidatively decomposed by adding a large amount of oxidant, the investment and operation cost is extremely high, the investment cost can reach more than 2 times, the operation cost is about 4-5 times of the original process, and the construction unit is difficult to bear, and the oxidant added into the sewage is a large amount of oxidant, namely a secondary pollutant, generates a large amount of sludge hazardous waste, increases the treatment cost and the environmental pollution risk, and simultaneously, the dissolved oxidant also increases the salinity of the leachate sewage, and is not suitable for some areas with salinity requirements on the discharged water. In addition, the oxidizing capability of the oxidizing agent has certain limitation, organic pollutants which are difficult to oxidize cannot be decomposed, and the effluent exceeding rate is still high.
In conclusion, the biochemical treatment, ultrafiltration, nanofiltration, RO treatment process and the advanced oxidant treatment process have the following defects:
1. the biochemical treatment, ultrafiltration, nanofiltration and RO treatment process can not reach the full treatment scale of 100 percent, but can only reach the treatment scale of about 50 percent; the investment is large, and the operating cost is high; after the dense water is refilled, the concentration is accumulated in the day and month, so that the sewage station is paralyzed;
2. by adopting a high-grade oxidant treatment process, while the oxidant is added, hazardous waste sludge is generated, the salinity of sewage is increased, and secondary pollution is caused to the environment; and the pollutants which are difficult to degrade can not be completely oxidized, and the emission up to the standard is still difficult to ensure.
Therefore, a new technology for replacing the existing landfill leachate sewage treatment is urgently needed in the field, and a method for treating the landfill leachate sewage in a full amount by electron beam irradiation is designed to ensure the stable, long-term and economic full amount treatment of the landfill leachate sewage.
Disclosure of Invention
The invention aims to provide a method for treating garbage leachate sewage by electron beam irradiation, which has the advantages of no concentrated water recharge, low operation cost, low investment cost, thorough decomposition of pollutants, no risk of newly-increased hazardous waste and salinity and no need of adding disinfection equipment, and solves the problem that the total treatment scale of 100 percent cannot be reached and only about 50 percent can be reached by adopting biochemical treatment, ultrafiltration, nanofiltration and RO treatment processes; the investment is large, and the operating cost is high; after the dense water is refilled, the concentration is accumulated in the day and month, so that the sewage station is paralyzed; by adopting a high-grade oxidant treatment process, while the oxidant is added, hazardous waste sludge is generated, the salinity of sewage is increased, and secondary pollution is caused to the environment; and the pollutants which are difficult to degrade can not be completely oxidized, and the emission up to the standard is still difficult to ensure.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for treating landfill leachate sewage by electron beam irradiation in full quantity comprises the following steps:
(A) firstly, adding a polymer into the landfill leachate, and carrying out aeration pretreatment;
(B) the garbage percolate after aeration pretreatment enters a mud-water separation device to remove suspended matters;
(C) performing secondary A/O biochemical treatment on the landfill leachate after the removal of the suspended matters, and performing primary removal of carbon, nitrogen and phosphorus;
(D) the landfill leachate after the secondary A/O biochemical treatment enters electron beam irradiation equipment for irradiation oxidation decomposition;
(E) performing postbiochemical advanced treatment on the garbage percolate subjected to irradiation, oxidation and decomposition to further remove pollutants in the garbage percolate;
(F) and finally, automatically flowing the landfill leachate after the post-biochemical advanced treatment into a sedimentation tank for mud-water separation, and discharging the supernatant after reaching the standard.
Further, the polymer added in the step (A) is iron-aluminum polymer, the iron-aluminum polymer adopts PAC or PAFC, the added polymer concentration range is 100ppm-300ppm, and the retention time of the landfill leachate in the aeration tank ranges from 8 hours to 36 hours.
Further, the mud-water separation device in the step (B) adopts a precipitation, air flotation, centrifugation or filter pressing mode.
Further, in the step (C), the biochemical treatment of the second-level A/O is carried out, wherein the biochemical retention time of the first-level A is 10-36 hours, the biochemical retention time of the first-level O is 12-48 hours, the biochemical retention time of the second-level A is 10-48 hours, and the biochemical retention time of the second-level O is 10-48 hours.
Furthermore, the two internal reflux ratios of the secondary A/O biochemical treatment in the step (C) are both 50-300%, and a contact oxidation method is adopted.
Further, the electron beam irradiation equipment in the step (D) performs thin film type irradiation oxidative decomposition, and the irradiation dose range of the electron beam is 1-50 kGy.
Further, the post-biochemical advanced treatment in the step (E) adopts an anoxic-aerobic, SBR or MBR treatment process, and the filler in the treatment equipment adopts combined filler, elastic filler, suspended filler or spherical filler.
Further, the internal and external reflux ratios of the postbiochemical advanced treatment in the step (E) are both 100 to 900 percent.
Further, in the secondary A/O biochemical treatment in the step (C) and the biochemical deep treatment after the step (E), the reflux ratio is adjusted by a pump and a valve.
Further, the electron beam irradiation equipment in the step (D) is connected with the front and rear processes through pressurizing and lifting by a water inlet and outlet lifting pump.
Compared with the prior art, the invention has the beneficial effects that:
1. and (3) no-concentrated water recharging: the pollutant is thoroughly decomposed by the integral process treatment method, all the sewage reaches the standard and is discharged, and concentrated water like RO membrane treatment cannot be generated;
2. the operation cost is low: the main process adopts an electron beam irradiation technology, almost no other cost is needed except for newly increased electricity charge, compared with the traditional RO membrane treatment technology and no membrane replacement cost, the actual operation cost is greatly reduced, and as the irradiation technology decomposes most macromolecular organic matters, the carbon source is increased, and the carbon source adding cost can also be greatly reduced;
3. the investment cost is low: the process avoids the investment cost of RO membrane deep treatment and the investment cost of concentrated water evaporation, and the investment cost is about 50 percent of the investment cost;
4. complete decomposition of the pollutants: hydroxyl free radicals in molecules can be excited through irradiation oxidation, oxidation is carried out from inside to outside, and pollutants are hardly decomposed in a reserved mode;
5. no risk of newly-increased hazardous waste and salinity: the whole system adopts an irradiation oxidation technology, is in an electricity utilization mode, and does not increase the salinity in sludge hazardous waste and sewage as the advanced oxidation processes such as micro-electrolysis, Fenton and the like;
6. no additional disinfection equipment is required: the irradiation system can be used as a disinfection function, can kill basically all bacteria, algae, ovaries and the like during irradiation, is many times stronger than the traditional ultraviolet and chlorine disinfection, and does not generate secondary pollutants.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the method for treating landfill leachate sewage by electron beam irradiation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a method for treating landfill leachate sewage by electron beam irradiation, comprising the steps of:
(A) firstly, adding an iron-aluminum polymer into the landfill leachate, and carrying out aeration pretreatment;
(B) the garbage percolate after aeration pretreatment enters a mud-water separation device to remove suspended matters;
(C) performing secondary A/O biochemical treatment on the landfill leachate after the removal of the suspended matters, and performing primary removal of carbon, nitrogen and phosphorus;
(D) the landfill leachate after the secondary A/O biochemical treatment enters electron beam irradiation equipment for irradiation oxidation decomposition;
(E) performing postbiochemical advanced treatment on the garbage percolate subjected to irradiation, oxidation and decomposition to further remove pollutants in the garbage percolate;
(F) and finally, automatically flowing the landfill leachate after the post-biochemical advanced treatment into a sedimentation tank for mud-water separation, and discharging the supernatant after reaching the standard.
The polymer added in the step (A) is an iron-aluminum polymer, the iron-aluminum polymer adopts PAC or PAFC, the concentration range of the added polymer is 100ppm-300ppm, and the retention time of the landfill leachate in the aeration tank is 8 hours-36 hours.
The PAC is a new water purifying material, an inorganic high-molecular coagulant, polyaluminium chloride for short, PAC (poly aluminum chloride) for short, is a water-soluble inorganic high-molecular polymer between AlCI3 and Al (OH)3, and has a chemical general formula of [ Al2(OH) nCl6-nLm ], wherein m represents the polymerization degree, and n represents the neutral degree of the PAC product. In m products, n is 1-5 which is a high-charge polymerization ring chain body with a Keggin structure, has high electric neutralization and bridging effects on colloids and particles in water, can strongly remove micro-toxicants and heavy metal ions, and has stable properties.
The PAFC is a novel efficient coagulant prepared by adding ferric ions or ferric trioxide and other iron-containing compounds into polymeric aluminum ferric chloride and carrying out coagulation hydrolysis on aluminum salt and ferric salt to prepare an inorganic high-molecular coagulant according to a synergistic principle.
And (B) adopting a sedimentation, air flotation, centrifugation or filter pressing mode for the mud-water separation device, and preferably adopting a high-speed centrifuge separation mode for the mud-water separation device.
And (C) performing secondary A/O biochemical treatment, wherein the primary A biochemical residence time is 10-36 hours, the primary O biochemical residence time is 12-48 hours, the secondary A biochemical residence time is 10-48 hours, and the secondary O biochemical residence time is 10-48 hours.
The two internal reflux ratios of the secondary A/O biochemical treatment in the step (C) are both 50-300 percent, and a contact oxidation method is adopted; in the secondary A/O biochemical treatment in the step (C), a contact oxidation method is adopted in an O tank; the contact oxidation method is preferably combined with filling.
Performing thin film type irradiation oxidative decomposition on the electron beam irradiation equipment in the step (D), wherein the irradiation dose range of the electron beam is 1-50 kGy; the electron beam irradiation adopts a film type mode, and a film type realization method adopts a high-pressure pump combined with a multi-layer flat nozzle to realize the irradiation.
The post-biochemical advanced treatment in the step (E) adopts anoxic-aerobic, SBR or MBR treatment process, and the filler in the treatment equipment adopts combined filler, elastic filler, suspended filler or spherical filler; the combined filler adopts phi 150-phi 200 type elastic filler, the suspended filler adopts k1, k2 and k3 type suspended filler, and the spherical filler adopts phi 50-phi 150 type spherical filler; the post-biochemical system preferably adopts an anoxic-aerobic mode or adopts a PVDF material MBR process.
The internal and external reflux ratio of the postbiochemical advanced treatment in the step (E) is 100 to 900 percent.
In the secondary A/O biochemical treatment in the step (C) and the biochemical deep treatment after the step (E), the reflux ratio is adjusted by a pump and a valve.
And (D) connecting the front process and the rear process by pressurizing and lifting the electron beam irradiation equipment through a water inlet lifting pump and a water outlet lifting pump.
The step (F) automatically flows into a sedimentation tank for mud-water separation, the supernatant reaches the standard and is discharged, and the sedimentation tank adopts a vertical flow type, a horizontal flow type or a horizontal flow type; preferably, a vertical sedimentation tank is used.
The front end of the iron-aluminum polymer aeration pretreatment is regulated by adopting a regulating reservoir, and the retention time of the regulating reservoir is 1-4 days.
The iron-aluminum polymer aeration pretreatment and the mud-water separation device are connected through a UPVC or galvanized pipe.
In the second-stage A/O biochemical treatment, the reflux ratio is adjusted by a pump and a valve. The water pump adopts frequency conversion to control flow, and the valve adopts a pneumatic valve type.
When the electron beam irradiation equipment carries out irradiation oxidation, the front and the back processes are connected by pressurizing and lifting through a water inlet and outlet lifting pump. Buffer pool in the middle of the water inlet and outlet design, multiple sets of lift pumps are adopted, 1 standby pump is designed, and PLC automatic program control is used.
In the post biochemical deep treatment, the internal and external reflux ratio is adjusted by a pump and a valve. The water pump adopts frequency conversion to control flow, and the valve adopts a pneumatic valve type.
By arranging the iron-aluminum polymer pre-aeration treatment, a large amount of mineral slag and sulfides are removed, and the load of SS and subsequent treatment is reduced; by setting two-stage A/O biochemical treatment and carrying out nitrification and denitrification treatment, most of COD and NH can be removed3N, TP, etc. By setting electron beam irradiation and post-biochemical treatment, pollutants which are difficult to be biochemically decomposed can be continuously decomposed, the B/C ratio is improved, the treatment efficiency is improved, and the pollutants are deeply decomposed. The sedimentation tank is arranged, so that mud and water can be separated, and sewage can be thoroughly clarified and discharged in full standard.
Experimental data testing table of the following process
In conclusion, the method for treating the garbage leachate sewage in full quantity by electron beam irradiation can ensure that the garbage leachate is treated and discharged in full quantity, has low operation cost and investment cost, can completely oxidize and decompose refractory pollution components, has no newly increased risk of salinity hazardous waste, and does not need to increase disinfection equipment. Can achieve the purpose of stable, long-term and economic full-scale treatment of the landfill leachate sewage
The invention is not described in detail, but is well known to those skilled in the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for treating landfill leachate sewage by electron beam irradiation full dose is characterized by comprising the following steps:
(A) firstly, adding a polymer into the landfill leachate, and carrying out aeration pretreatment;
(B) the garbage percolate after aeration pretreatment enters a mud-water separation device to remove suspended matters;
(C) performing secondary A/O biochemical treatment on the landfill leachate after the removal of the suspended matters, and performing primary removal of carbon, nitrogen and phosphorus;
(D) the landfill leachate after the secondary A/O biochemical treatment enters electron beam irradiation equipment for irradiation oxidation decomposition;
(E) performing postbiochemical advanced treatment on the garbage percolate subjected to irradiation, oxidation and decomposition to further remove pollutants in the garbage percolate;
(F) and finally, automatically flowing the landfill leachate after the post-biochemical advanced treatment into a sedimentation tank for mud-water separation, and discharging the supernatant after reaching the standard.
2. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: the polymer added in the step (A) is an iron-aluminum polymer, the iron-aluminum polymer adopts PAC or PAFC, the concentration range of the added polymer is 100ppm-300ppm, and the retention time of the landfill leachate in the aeration tank is 8 hours-36 hours.
3. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: and (B) adopting a sedimentation, air flotation, centrifugation or filter pressing mode for the mud-water separation device in the step (B).
4. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: and (C) performing secondary A/O biochemical treatment, wherein the primary A biochemical residence time is 10-36 hours, the primary O biochemical residence time is 12-48 hours, the secondary A biochemical residence time is 10-48 hours, and the secondary O biochemical residence time is 10-48 hours.
5. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: the two internal reflux ratios of the secondary A/O biochemical treatment in the step (C) are both 50-300 percent, and a contact oxidation method is adopted.
6. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: and (D) performing thin film type irradiation oxidative decomposition by using the electron beam irradiation equipment in the step (D), wherein the irradiation dose range of the electron beam is 1-50 kGy.
7. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: the post-biochemical advanced treatment in the step (E) adopts anoxic and aerobic, SBR or MBR treatment process, and the filler in the treatment equipment adopts combined filler, elastic filler, suspended filler or spherical filler.
8. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: the reflux ratio of the aerobic reflux to the electron beam irradiation front end of the post-biochemical advanced treatment in the step (E) and the reflux ratio of the external reflux to the electron beam irradiation front end of the sedimentation tank are both 100-900%.
9. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: in the secondary A/O biochemical treatment in the step (C) and the biochemical deep treatment after the step (E), the reflux ratio is adjusted by a pump and a valve.
10. The method for full-scale treatment of landfill leachate sewage through electron beam irradiation according to claim 1, wherein the method comprises the following steps: and (D) connecting the front process and the rear process by pressurizing and lifting the electron beam irradiation equipment through a water inlet lifting pump and a water outlet lifting pump.
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| CN111847797A (en) * | 2020-07-31 | 2020-10-30 | 中节能工程技术研究院有限公司 | Zero-emission treatment system and method for leachate of waste incineration plant |
| CN113772886A (en) * | 2021-09-10 | 2021-12-10 | 中广核达胜科技有限公司 | Full-quantitative treatment method of landfill leachate |
| CN114426376A (en) * | 2021-12-30 | 2022-05-03 | 北京核力同创科技有限公司 | Treatment process for treating organic sewage by virtue of ionizing radiation and catalyst |
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