CN112607973B - A vehicle-mounted mobile garbage leachate emergency treatment method and system - Google Patents
A vehicle-mounted mobile garbage leachate emergency treatment method and system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 50
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000001728 nano-filtration Methods 0.000 claims abstract description 68
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 54
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 53
- 230000003647 oxidation Effects 0.000 claims abstract description 46
- 238000005273 aeration Methods 0.000 claims abstract description 45
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000005416 organic matter Substances 0.000 claims abstract description 31
- 238000005345 coagulation Methods 0.000 claims abstract description 29
- 230000015271 coagulation Effects 0.000 claims abstract description 29
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010802 sludge Substances 0.000 claims abstract description 15
- 239000000149 chemical water pollutant Substances 0.000 claims abstract description 14
- 239000006228 supernatant Substances 0.000 claims abstract description 13
- 239000002351 wastewater Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 141
- 238000006243 chemical reaction Methods 0.000 claims description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 48
- 230000001360 synchronised effect Effects 0.000 claims description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- 238000007034 nitrosation reaction Methods 0.000 claims description 12
- 230000009935 nitrosation Effects 0.000 claims description 11
- 229910021536 Zeolite Inorganic materials 0.000 claims description 10
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 10
- 239000010457 zeolite Substances 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000010000 carbonizing Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 239000012528 membrane Substances 0.000 description 7
- 238000001223 reverse osmosis Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
-
- 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
-
- 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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/008—Mobile apparatus and plants, e.g. mounted on a vehicle
-
- 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
- C02F2209/16—Total nitrogen (tkN-N)
-
- 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
- C02F3/02—Aerobic processes
- C02F3/06—Aerobic processes using submerged filters
-
- 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
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- 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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
本发明公开了一种车载移动式垃圾渗滤液应急处理方法，包括以下步骤：设置一移动式车载垃圾渗滤液应急处理系统，将渗滤液首先进行纳滤处理；纳滤出水进入亚硝化‑厌氧氨氧化处理，纳滤浓缩液则经过聚铁混凝处理后，上清液与亚硝化‑厌氧氨氧化处理出水混合进行后续深度处理；在脱氮曝气生物滤室中处理后再进行反硝化处理；进入臭氧曝气生物滤室中，将难降解有机物分解破坏碳化，再将废水中残余的有机物与氨氮进一步去除，最后出水达标外排。本发明还公开了实施该方法的系统，其为一将各组成部分均设置在一集装箱内、便于车载移动和作业的一体化系统。本发明无浓缩液排出，无需外加碳源，节省曝气量，污泥产量少，适用于应急处理。
The present invention discloses a vehicle-mounted mobile emergency treatment method for landfill leachate, comprising the following steps: setting a mobile vehicle-mounted emergency treatment system for landfill leachate, first subjecting the leachate to nanofiltration treatment; the nanofiltration effluent enters the nitrite-anaerobic ammonia oxidation treatment, and the nanofiltration concentrate is subjected to polyferric coagulation treatment, and the supernatant is mixed with the nitrite-anaerobic ammonia oxidation treatment effluent for subsequent deep treatment; after treatment in a denitrification aerated biological filter chamber, denitrification treatment is performed; entering an ozone aerated biological filter chamber, decomposing and destroying the refractory organic matter to carbonize, and then further removing the residual organic matter and ammonia nitrogen in the wastewater, and finally the effluent meets the standards for external discharge. The present invention also discloses a system for implementing the method, which is an integrated system in which all components are arranged in a container, which is convenient for vehicle-mounted movement and operation. The present invention has no concentrated liquid discharge, does not require an external carbon source, saves aeration volume, has a low sludge output, and is suitable for emergency treatment.
Description
Technical Field
The invention relates to the technical field of environmental protection water pollution treatment. In particular to a vehicle-mounted mobile garbage leachate emergency treatment method and system.
Background
The landfill leachate is typical high-concentration wastewater containing high ammonia nitrogen and refractory organics, and the treatment difficulty is extremely high. The key point of the treatment is how to effectively remove ammonia nitrogen, total nitrogen and organic matters difficult to be biologically degraded. The conventional domestic garbage leachate treatment generally adopts a biochemical method and a membrane method process. The biochemical method is to remove ammonia nitrogen and total nitrogen in the percolate by complete nitrification and denitrification, and biochemical effluent is deeply treated by nanofiltration and reverse osmosis membrane processes. The complete nitration of high concentration ammonia nitrogen needs to consume a large amount of dissolved oxygen, the aeration energy consumption is large, and when the carbon nitrogen ratio is insufficient (lower than 5), a large amount of carbon source is needed to be added, so that the operation cost is increased. At present, a conventional garbage leachate emergency treatment device adopts a multi-stage high-pressure reverse osmosis device, a large amount of sulfuric acid is needed to be added to form ammonium sulfate, and the ammonium sulfate is separated through high-pressure reverse osmosis, and an evaporation emergency treatment device also needs a large amount of sulfuric acid to prevent ammonia from escaping.
The membrane method technology only carries out concentration and separation on pollutants, and the discharged high-salt-containing concentrated solution is recycled to a landfill, and the evaporation method is the same as the membrane method, so that the concentrated solution also needs to be recycled, and the salinity of the percolate is increased after long-term operation, so that the whole percolate treatment system cannot normally operate, and the percolate in the landfill is gradually accumulated. The existing garbage emergency treatment engineering vehicle adopts a high-pressure reverse osmosis method, but the concentration of the concentrated solution water is continuously increased due to continuous recharging, so that the leachate is hardly treated further.
When the diversion of rain and sewage is incomplete, the yield of percolate is suddenly increased in stormy weather, the processing capacity of the original processing factory is limited, and emergency processing equipment is also required to be added for processing redundant percolate. With the improvement of the national percolate discharge standard and the increase of the supervision force of environmental protection departments, the frequent occurrence of the problems aggravates the pollutant control and emission reduction pressure of most of the percolate treatment plants in the landfill in China, and the traditional processes such as complete nitrification and denitrification combined ultrafiltration-reverse osmosis treatment and the like are difficult to meet the treatment target requirements. There is an urgent need to develop a set of percolate emergency treatment method and system equipment which are lower in carbon, energy-saving, stable and efficient, so as to meet the requirements.
Disclosure of Invention
The invention aims at improving the domestic garbage leachate discharge standard and solving the problem that the traditional technology such as complete nitrification and denitrification combined ultrafiltration-reverse osmosis treatment is difficult to meet the treatment target requirement, and provides a vehicle-mounted mobile garbage leachate emergency treatment method and system, which can flexibly, low-carbon, energy-saving, stable and efficient carry out emergency treatment of the leachate.
The invention aims at realizing the following technical scheme:
the vehicle-mounted mobile garbage leachate emergency treatment method is characterized by comprising the following steps of:
1) The mobile vehicle-mounted garbage leachate emergency treatment system is arranged in a container, and the container and equipment in the container can be integrally installed on an automobile for emergency treatment operation, and comprises a water inlet pump, a nanofiltration treatment device, a nanofiltration water pump with low organic matter concentration, a nitrosation-anaerobic ammonia oxidation synchronous reaction device, a nitrosation-anaerobic ammonia oxidation synchronous reaction water outlet pump, a denitrification biological filter chamber (DN-BAF), a denitrification water outlet pump, an ozone-aeration biological filter chamber (O 3 -BAF), a nanofiltration water pump with high organic matter concentration, a polyiron coagulation chamber, an air pump and an ozone generator which are connected through pipelines;
2) Inputting the landfill leachate into a nanofiltration treatment device through a water inlet pump, and enabling the landfill leachate to flow into the nanofiltration treatment device for concentration treatment and separation to respectively obtain nanofiltration water with low organic matter concentration and concentrated solution with high organic matter concentration;
3) Introducing nanofiltration water with low organic matter concentration into a nitrosation-anaerobic ammonia oxidation synchronous reaction device filled with ammonia nitrogen adsorption filler through a nanofiltration water pump, aerating, controlling hydraulic retention time to realize nitrosation, introducing the nitrified outlet into an anaerobic ammonia oxidation reactor, aerating, and then performing anaerobic ammonia oxidation reaction to realize denitrification of ammonia nitrogen wastewater;
simultaneously, the nanofiltration concentrated solution with high organic matter concentration enters a polyiron coagulation chamber through a nanofiltration water pump for coagulation and precipitation;
4) Enabling effluent of the anaerobic ammoxidation reaction to enter a denitrification biological filter chamber (DN-BAF) through a nitrosation-anaerobic ammoxidation synchronous reaction effluent pump for denitrification reaction, and removing part of organic matters and total nitrogen;
5) Leading the effluent of the denitrification biological filter chamber (DN-BAF) to enter an ozone-aeration biological filter chamber (O 3 -BAF) through a water pump, leading ozone into the ozone-aeration biological filter chamber (O 3 -BAF) through an air pump by an ozone generator, decomposing, destroying and carbonizing refractory organic matters by utilizing strong oxidizing property of the ozone, and further removing residual organic matters and ammonia nitrogen in the wastewater by utilizing a biological film in the ozone-aeration biological filter chamber (O 3 -BAF);
6) Introducing the supernatant of the polyferric coagulation chamber into a nitrosation-anaerobic ammoxidation synchronous reaction device for treatment, filtering residual water in an ozone-aeration biological filter chamber (O 3 -BAF), refluxing the residual water into a denitrification biological filter chamber (DN-BAF) for total nitrogen removal, and repeating the steps (3) - (5);
7) And (3) discharging the effluent finally reaching the standard after the ozone-aeration biological filter chamber (O 3 -BAF) is treated, and simultaneously compressing and discharging flocculated sludge in the polyiron coagulation chamber.
The ammonia nitrogen inflow load range of the nitrosation-anaerobic ammonia oxidation synchronous reaction device (4) in the step 3) is 1000-2500mg/L.
The nitrosation water temperature in the step 3) is 25-40 ℃, the aeration condition is that the concentration of dissolved oxygen in the device is 1-5mg/L, and the hydraulic retention time is 0.5-12h.
The ammonia nitrogen adsorption filler in the step 3) is one or a mixture of two of natural zeolite and artificial zeolite.
The concentration of dissolved oxygen in the anaerobic ammoxidation reaction is controlled to be 0.1-3mg/L, the reaction temperature is 28+/-5 ℃, and the hydraulic retention time is 12-24h.
Step 3) anaerobic ammoxidation denitrification load is 1.0 KgN/(m 3. D).
The vehicle-mounted mobile garbage leachate emergency treatment system for implementing the method is an integrated system which is formed by arranging all components in a container and is convenient for vehicle-mounted movement and operation, and comprises a water inlet pump, a nanofiltration treatment device, a nanofiltration water pump with low organic matter concentration, a nitrosation-anaerobic ammonia oxidation synchronous reaction device, a nitrosation-anaerobic ammonia oxidation synchronous reaction water outlet pump, a denitrification biological filter chamber (DN-BAF), a denitrification water outlet pump, an ozone-aeration biological filter chamber (O 3 -BAF), a nanofiltration water pump with high organic matter concentration, a polyiron coagulation chamber, an air pump and an ozone generator which are connected through pipelines;
Wherein the water inlet pump is connected with the water inlet of the nanofiltration treatment device through a pipeline, the water outlet at the upper part of the nanofiltration treatment device is connected with the water inlet of a nanofiltration water pump with low organic concentration, the water outlet at the lower part of the nanofiltration treatment device is connected with the water inlet of a nanofiltration water pump with high organic concentration, the water outlet of the nanofiltration water pump with low organic concentration is connected with the water inlet of a nitrosation-anaerobic ammonia oxidation synchronous reaction device, the water outlet of the nitrosation-anaerobic ammonia oxidation synchronous reaction device is connected with the water inlet of a nitrosation-anaerobic ammonia oxidation synchronous reaction water pump, the water outlet of the nitrosation-anaerobic ammonia oxidation synchronous reaction water outlet pump is connected with the water inlet of a denitrification biological filter chamber (DN-BAF), the water outlet of the denitrification biological filter chamber (DN-BAF) is connected with the water inlet of the denitrification water pump, the water outlet of the denitrification water pump is connected with the water inlet of an ozone-aeration biological filter chamber (O 3 -BAF), the water outlet of the ozone-aeration biological filter chamber (O 3 -BAF) is led out of a standard-reaching water outlet system, the water outlet of the nitrosation-anaerobic filter chamber is connected with the water inlet of the water pump with the water inlet of the denitrification biological filter chamber (DN-BAF) through the water inlet of the water pump, the water inlet of the nanofiltration device is connected with the water inlet of the denitrification biological filter chamber (DN-BAF), introducing supernatant in the polyiron coagulation chamber into a nitrosation-anaerobic ammoxidation synchronous reaction device for treatment, connecting a filtered residual water outlet of the ozone-aeration biological filter chamber (O 3 -BAF) with a water inlet of a denitrification biological filter chamber (DN-BAF) to enable filtered residual water to flow back into the denitrification biological filter chamber (DN-BAF) for total nitrogen removal, and compressing flocculated sludge by a sludge outlet of the polyiron coagulation chamber and discharging the flocculated sludge to the outside of the system.
Compared with the prior art, the invention has the following advantages:
1. The invention provides a vehicle-mounted mobile leachate emergency treatment method and system, which are environment-friendly treatment processes based on anaerobic ammonia oxidation and free of concentrated solution discharge, and particularly take the anaerobic ammonia oxidation process as a core, combine nanofiltration, high-efficiency nitrosation-anaerobic ammonia oxidation and chemical oxidation-aeration biological filter chambers, can effectively remove ammonia nitrogen, total nitrogen and refractory organics, and realize the garbage leachate emergency treatment method and system which are truly low-carbon, energy-saving, stable, high-efficiency and free of concentrated solution discharge.
2. The vehicle-mounted mobile leachate emergency treatment system provided by the invention has ingenious structural design, adopts an integrated design, adopts all treatment process units comprising nanofiltration, high-efficiency nitrosation-anaerobic ammonia oxidation, chemical oxidation-aeration biological filter chambers and other main units, and is completely arranged in a container, and the container and the equipment in the container can be integrally arranged on an automobile for emergency treatment operation, so that the vehicle-mounted mobile leachate emergency treatment system is convenient for vehicle-mounted transportation and operation, has strong maneuverability, can be flexibly deployed, and meets the emergency treatment requirement.
3. The invention adopts nanofiltration technology to pretreat the percolate, the nanofiltration water flows into a nitrosation-anaerobic ammoxidation combined reaction tank of the next unit through a pipeline, the nanofiltration concentrated solution for intercepting organic matters and suspended matters particles flows into a polyiron coagulation sedimentation tank to carry out coagulation treatment, the coagulated sludge is transported outwards, and the coagulated supernatant is discharged into a denitrification aeration biological filter chamber (DN-BAF).
4. The stable and efficient nitrosation method based on the ammonia nitrogen adsorption medium provided by the invention is combined with an anaerobic ammonia oxidation process, so that ammonia nitrogen in nanofiltration supernatant is converted into nitrosation nitrogen, the efficient nitrosation anaerobic ammonia oxidation treatment of high ammonia nitrogen wastewater is realized, and the reaction effluent is discharged into a denitrification aeration biological filter chamber (DN-BAF).
5. The anaerobic ammonia oxidation technology provided by the invention is based on anaerobic ammonia oxidation bacteria, and ammonia nitrogen and nitrite in the nitrosation reaction filter chamber and the coagulating supernatant are converted into nitrogen and a very small part of nitrate by the bacteria, so that ammonia nitrogen and total nitrogen in the wastewater are removed.
6. The invention adopts a chemical oxidation-aeration biological filter chamber combined water treatment method to realize the advanced treatment of the hardly biodegradable organic matters of the effluent by the non-membrane method percolate.
7. The invention removes most of organic suspended matters and colloid by selecting a mature polyiron coagulation treatment method, and organic matters remained in coagulating sedimentation supernatant can be connected into anaerobic BAF of a deep treatment section through the supernatant to supplement denitrification carbon sources, thereby avoiding the discharge of concentrated solution.
8. According to the anaerobic ammonia oxidation technology, only about half of ammonia nitrogen is required to be converted into nitrite, compared with complete nitrification reaction, the aeration energy consumption can be saved by about 70%, organic carbon sources are not required to be consumed in the reaction process, the addition of the organic carbon sources can be greatly saved, the multiplication rate of anaerobic ammonia oxidation is reduced, the sludge yield is low in the treatment process, and the sludge treatment cost can be greatly reduced. The technology is used for emergency treatment of the percolate, so that the energy consumption and the medicament cost in the treatment process of the percolate can be greatly reduced, and the economic and efficient denitrification of the percolate can be realized.
9. The ammonia nitrogen wastewater stable nitrosation method based on the ammonia nitrogen adsorption material solves one of application bottlenecks of anaerobic ammonia oxidation technology, and can realize stable ammonia nitrogen nitrosation.
10. The advanced treatment process of the chemical oxidation-aeration biological filter chamber provided by the invention can effectively reduce refractory organic matters and residual ammonia nitrogen and total nitrogen in the biochemical treatment tail water, has no discharge of concentrated solution, and can ensure that the treated effluent reaches the main index of water quality.
Drawings
Fig. 1 is a schematic diagram of a flow and a system composition of a vehicle-mounted mobile landfill leachate emergency treatment method provided by the invention.
In the figure:
1. The device comprises a water inlet pump, a nanofiltration treatment device, a nanofiltration water pump with low organic matter concentration, a nitrosation-anaerobic ammoxidation synchronous reaction device, a nitrosation-anaerobic ammoxidation synchronous reaction water outlet pump, a denitrification biological filter chamber (DN-BAF), a denitrification water outlet pump, an ozone-aeration biological filter chamber (O3-BAF), a nanofiltration water pump with high organic matter concentration, a polyiron coagulation chamber, a ferric chloride coagulation chamber, a gas pump, a ferric hydroxide generator and an ozone generator.
Detailed Description
The present invention will be described in further detail with reference to examples, but the scope of the invention as claimed is not limited to the scope indicated by the examples.
Example 1:
Referring to fig. 1, the vehicle-mounted mobile landfill leachate emergency treatment system provided in this embodiment is an integrated system in which each component is disposed in a container, so as to facilitate vehicle-mounted movement and operation, and the container and equipment in the container may be integrally installed on an automobile to perform emergency treatment operation, specifically, a set of landfill leachate emergency treatment system with a treatment scale of 50m 3/d, a treatment ammonia nitrogen concentration of 1000mg/L and a carbon nitrogen ratio of 2.
The device comprises a water inlet pump 1, a nanofiltration treatment device 2, a nanofiltration water pump 3 with low organic matter concentration, a nitrosation-anaerobic ammonia oxidation synchronous reaction device 4, a nitrosation-anaerobic ammonia oxidation synchronous reaction water outlet pump 5, a denitrification biological filter chamber (DN-BAF) 6, a denitrification water outlet pump 7, an ozone-aeration biological filter chamber (O 3 -BAF) 8, a nanofiltration water pump 9 with high organic matter concentration, a polyiron coagulation chamber 10, an air pump 11 and an ozone generator 12 which are connected through pipelines.
Wherein the water inlet pump 1 is connected with the water inlet of the nanofiltration treatment device 2 through a pipeline, the water outlet of the upper part of the nanofiltration treatment device 2 is connected with the water inlet of a nanofiltration water pump 3 with low organic matter concentration, the water outlet of the lower part of the nanofiltration treatment device 2 is connected with the water inlet of a nanofiltration water pump 9 with high organic matter concentration, the water outlet of the nanofiltration water pump 3 with low organic matter concentration is connected with the water inlet of a nitrosation-anaerobic ammonia oxidation synchronous reaction device 4, the water outlet of the nitrosation-anaerobic ammonia oxidation synchronous reaction device 4 is connected with the water inlet of a nitrosation-anaerobic ammonia oxidation synchronous reaction water pump 5, the water outlet side of the nitrosation-anaerobic ammonia oxidation synchronous reaction water pump 5 is connected with the water inlet of a denitrification biological filter chamber (DN-BAF) 6, the water outlet of the denitrification biological filter chamber (DN-BAF) 6 is connected with the water inlet of a denitrification water pump 7, the water outlet side of the denitrification water pump 7 is connected with the water inlet of an ozone-aeration biological filter chamber (O 3 -BAF) 8, the water outlet of the ozone-aeration biological filter chamber (O 3 - 3) is connected with the water inlet of an ozone generator 10 of an ozone-aeration biological filter chamber (DN-BAF) 8, the water inlet of the denitrification biological filter chamber is connected with the water pump 10, the water inlet of the denitrification biological filter chamber is connected with the water inlet of an ozone pump 10, the water pump is connected with the water inlet of an anaerobic filter chamber (DN-BAF) 6, the water pump is connected with the water inlet of a water pump 6, introducing supernatant in the polyiron coagulation chamber 10 into a nitrosation-anaerobic ammonia oxidation synchronous reaction device 4 for treatment, connecting a filtered residual water outlet of the ozone-aeration biological filter chamber (O 3 -BAF) 8 with a water inlet of a denitrification biological filter chamber (DN-BAF) 6, enabling filtered residual water to flow back into the denitrification biological filter chamber (DN-BAF) 6 for total nitrogen removal, and compressing flocculated sludge by a sludge outlet of the polyiron coagulation chamber 10 and discharging the flocculated sludge to the outside of the system.
A vehicle-mounted mobile garbage leachate emergency treatment method comprises the following steps:
1) A movable vehicle-mounted garbage leachate emergency treatment system is arranged in a container and comprises a water inlet pump 1, a nanofiltration treatment device 2, a nanofiltration water pump 3 with low organic matter concentration, a nitrosation-anaerobic ammonia oxidation synchronous reaction device 4, a nitrosation-anaerobic ammonia oxidation synchronous reaction water outlet pump 5, a denitrification biological filter chamber (DN-BAF) 6, a denitrification water outlet pump 7, an ozone-aeration biological filter chamber (O 3 -BAF) 8, a nanofiltration water pump 9 with high organic matter concentration, a polyiron coagulation chamber 10, an air pump 11 and an ozone generator 12 which are connected through pipelines;
2) Inputting landfill leachate into a nanofiltration treatment device 2 through a water inlet pump 1, and enabling the landfill leachate to flow into the nanofiltration treatment device 2 for concentration treatment and separation to respectively obtain nanofiltration water with low organic matter concentration and concentrated solution with high organic matter concentration;
3) Leading nanofiltration water with low organic matter concentration to enter a nitrosation-anaerobic ammonia oxidation synchronous reaction device 4 filled with ammonia nitrogen adsorption filler through a nanofiltration water pump 3, aerating, controlling hydraulic retention time to realize nitrosation, leading the nitrified outlet into an anaerobic ammonia oxidation reactor, aerating, and then carrying out anaerobic ammonia oxidation reaction to realize denitrification of ammonia nitrogen wastewater;
Specifically, the ammonia nitrogen inflow load range of the nitrosation-anaerobic ammonia oxidation synchronous reaction device 4 is 1000-2500mg/L, the nitrosation water temperature is 25-40 ℃, the aeration condition is that the dissolved oxygen concentration in the device is 1-5mg/L, the hydraulic retention time is 0.5-12h, the ammonia nitrogen adsorption filler is one or a mixture of two of natural zeolite and artificial zeolite, the natural zeolite is adopted in the embodiment, the anaerobic ammonia oxidation reaction dissolved oxygen concentration is controlled to be 0.1-3mg/L, the reaction temperature is 28+/-5 ℃, the hydraulic retention time is 12-24h, and the anaerobic ammonia oxidation reaction denitrification load is 1.0 KgN/(m 3.d);
simultaneously, the nanofiltration concentrated solution with high organic matter concentration enters a polyiron coagulation chamber 10 through a nanofiltration water pump 9 for coagulation and precipitation;
4) Enabling effluent water of the anaerobic ammoxidation reaction to enter a denitrification biological filter chamber (DN-BAF) 6 for denitrification reaction through a nitrosation-anaerobic ammoxidation synchronous reaction water pump 5, and removing part of organic matters and total nitrogen;
5) Leading the effluent of the denitrification biological filter chamber (DN-BAF) 6 to enter an ozone-aeration biological filter chamber (O 3 -BAF) 8 through a water pump 7, leading ozone into the ozone-aeration biological filter chamber (O 3 -BAF) 8 through an air pump 11 by an ozone generator 12, decomposing and destroying and carbonizing refractory organic matters by utilizing strong oxidizing property of the ozone, and further removing residual organic matters and ammonia nitrogen in the wastewater by utilizing a biological film in the ozone-aeration biological filter chamber (O 3 -BAF) 8;
6) Introducing supernatant of the polyferric coagulation chamber 10 into a nitrosation-anaerobic ammoxidation synchronous reaction device 4 for treatment, filtering residual water by an ozone-aeration biological filter chamber (O 3 -BAF) 8, refluxing the residual water into a denitrification biological filter chamber (DN-BAF) 6 for total nitrogen removal, and repeating the steps (3) - (5);
7) Finally, the effluent reaching the standard is discharged after being treated by an ozone-aeration biological filter chamber (O 3 -BAF) 8, and the flocculated sludge in the polyiron coagulation chamber 10 is compressed and discharged.
According to the system and the method for treating the percolate, which are provided by the embodiment, the treatment scale is 50m 3/d, the ammonia nitrogen concentration is 1000mg/L, the carbon-nitrogen ratio is 2, and compared with the conventional percolate emergency treatment equipment and technology, through practical tests, the system and the method for treating the percolate can save engineering investment by 1 ten thousand yuan/m 3 in similar projects, and save the electricity cost of about 8 yuan/m 3 and the additional carbon source cost of 15 yuan/m 3.
Example 2
The vehicle-mounted mobile garbage leachate emergency treatment method and system are basically the same as the embodiment, and are different in that the vehicle-mounted mobile garbage leachate emergency treatment method and system are particularly a set of leachate treatment system with treatment scale of 10m 3/d and anaerobic ammonia oxidation reaction treatment nitrogen load of 1.0 KgN/(m 3. D), ammonia nitrogen removal rate is more than 85%, total nitrogen removal rate is more than 75%, and CODcr is less than or equal to 100mg/L.
In this embodiment, the ammonia nitrogen adsorption filler in step 3) is artificial zeolite. In other embodiments, a mixture of natural zeolite and artificial zeolite can be used to achieve the technical effects of the present invention.
Through practical tests, compared with the conventional leachate emergency treatment equipment and technology, the similar project can save engineering investment by 1.2 ten thousand yuan/m 3, wherein the engineering investment comprises electric charge of 8.5 yuan/m 3 and additional carbon source of 15.5 yuan/m 3, and the like, and has wider application prospect.
The emergency treatment method and the emergency treatment system provided by the invention are characterized in that the landfill leachate is subjected to high-stability treatment process based on an anaerobic ammonia oxidation technology, macromolecule organic matters are concentrated and separated after the leachate is subjected to nanofiltration treatment, nanofiltration water with low organic matter concentration and concentrated solution with high organic matter concentration are obtained, the nanofiltration water enters nitrosation-anaerobic ammonia oxidation treatment, ammonia nitrogen and total nitrogen in the nanofiltration concentrated solution are greatly removed, supernatant fluid and nitrosation-anaerobic ammonia oxidation treatment effluent are mixed for subsequent deep treatment after the nanofiltration concentrated solution is subjected to polyferric coagulation treatment, coagulated sludge is subjected to outward transport treatment, residual organic matters in the coagulation supernatant fluid are utilized in a denitrification aeration biological filter chamber (DN-BAF), the anaerobic ammonia oxidation effluent and nitrate nitrogen which flows back from ozone aeration biological filter chamber (O 3 -BAF) are subjected to denitrification treatment, part of organic matters and total nitrogen are removed, DN-BAF effluent enters O 3 -BAF again, and the hard-degradable organic matters are decomposed and carbonized by utilizing ozone strong oxidizing property, and the residual ammonia nitrogen in the biological membrane is removed after the biological membrane is utilized, and finally the ammonia nitrogen in the residual effluent is subjected to further treatment. The invention uses anaerobic ammonia oxidation technology as a core, combines nanofiltration, high-efficiency nitrosation-anaerobic ammonia oxidation and chemical oxidation-aeration biological filter chamber processes, stably and efficiently removes ammonia nitrogen, total nitrogen and organic matters difficult to biodegrade, improves the reaction volume load, does not generate concentrated solution, does not need additional carbon source, saves aeration quantity and reduces sludge output, thereby realizing vehicle-mounted mobile emergency treatment of landfill leachate.
The method and the system provided by the invention have the advantages that no concentrated solution is discharged, the independently developed nitrosation-anaerobic ammonia oxidation process is adopted for denitrification, and finally ammonia nitrogen and total nitrogen are converted into nitrogen and discharged into the atmosphere, and the nitrogen and total nitrogen can be discharged at normal temperature, so that an additional heating device and a biogas collecting device are not needed, the capital cost and the operation cost are low, the real energy conservation and high efficiency can be realized, and the independently developed integrated ozone-aeration biological filter chamber process is adopted, so that the effluent organic matters can be ensured to be discharged up to the standard, and the system can be stably operated.
The invention can be used for emergency treatment, the system equipment adopts an integrated container design, the occupied area is small, the flexibility is strong, the transportation and operation costs are controllable, the operation effect is reliable, the operation process is stable, the operation can be performed at normal temperature, no carbon source is required to be added, the infrastructure cost is avoided, the invention is integrated vehicle-mounted equipment, the emergency requirement can be met, and the discharge pressure of a storm weather refuse landfill can be relieved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that the system design and method steps similar to or identical to the above embodiments of the present invention are all within the scope of the present invention.
Claims (6)
1. The vehicle-mounted mobile garbage leachate emergency treatment method is characterized by comprising the following steps of:
The system is characterized in that 1) a mobile vehicle-mounted garbage leachate emergency treatment system is arranged in a container and comprises a water inlet pump (1), a nanofiltration treatment device (2), a nanofiltration water pump (3) with low organic matter concentration, a nitrosation-anaerobic ammoxidation synchronous reaction device (4), a nitrosation-anaerobic ammoxidation synchronous reaction water outlet pump (5), a denitrification biological filter chamber (DN-BAF) (6), a denitrification water outlet pump (7), an ozone-aeration biological filter chamber (O 3 -BAF) (8), a nanofiltration water pump (9) with high organic matter concentration, a polyiron coagulation chamber (10), an air pump (11) and an ozone generator (12) which are connected through pipelines;
2) Inputting landfill leachate into a nanofiltration treatment device (2) through a water inlet pump (1), and enabling the landfill leachate to flow into the nanofiltration treatment device (2) for concentration treatment and separation to respectively obtain nanofiltration water with low organic matter concentration and concentrated solution with high organic matter concentration;
3) Leading nanofiltration water with low organic matter concentration to enter a nitrosation-anaerobic ammonia oxidation synchronous reaction device (4) filled with ammonia nitrogen adsorption filler through a nanofiltration water pump (3), aerating, controlling hydraulic retention time to realize nitrosation, leading the nitrified outlet into an anaerobic ammonia oxidation reactor, aerating, and then carrying out anaerobic ammonia oxidation reaction to realize denitrification of ammonia nitrogen wastewater;
simultaneously, the nanofiltration concentrated solution with high organic matter concentration enters a polyiron coagulation chamber (10) through a nanofiltration water pump (9) for coagulation and precipitation;
4) Enabling effluent water of the anaerobic ammoxidation reaction to enter a denitrification biological filter chamber (DN-BAF) (6) for denitrification reaction through a nitrosation-anaerobic ammoxidation synchronous reaction water pump (5) so as to remove part of organic matters and total nitrogen;
5) Leading the effluent of the denitrification biological filter chamber (DN-BAF) (6) to enter an ozone-aeration biological filter chamber (O 3 -BAF) (8) through a water pump (7), leading ozone into the ozone-aeration biological filter chamber (O 3 -BAF) (8) through an air pump (11) by an ozone generator (12), decomposing and destroying and carbonizing refractory organic matters by utilizing strong oxidizing property of the ozone, and further removing residual organic matters and ammonia nitrogen in the wastewater by utilizing a biological film in the ozone-aeration biological filter chamber (O 3 -BAF) (8);
6) Introducing supernatant of the polyferric coagulation chamber (10) into a nitrosation-anaerobic ammoxidation synchronous reaction device (4) for treatment, filtering residual water by an ozone-aeration biological filter chamber (O 3 -BAF) (8), refluxing the filtered residual water into a denitrification biological filter chamber (DN-BAF) (6) for total nitrogen removal, and repeating the steps (3) - (5);
7) And (3) discharging the effluent finally reaching the standard after the treatment of the ozone-aeration biological filter chamber (O 3 -BAF) (8), and simultaneously compressing and discharging the flocculated sludge in the polyiron coagulation chamber (10).
2. The vehicle-mounted mobile garbage leachate emergency treatment method according to claim 1, wherein the ammonia nitrogen inflow load range of the nitrosation-anaerobic ammonia oxidation synchronous reaction device (4) in the step 3) is 1000-2500mg/L.
3. The vehicle-mounted mobile garbage leachate emergency treatment method according to claim 1, wherein the nitrosation water temperature in the step 3) is 25-40 ℃, the aeration condition is that the concentration of dissolved oxygen in the device is 1-5mg/L, and the hydraulic retention time is 0.5-12h.
4. The vehicle-mounted mobile garbage leachate emergency treatment method according to claim 1, wherein the ammonia nitrogen adsorption filler in the step 3) is one or a mixture of two of natural zeolite and artificial zeolite.
5. The vehicle-mounted mobile garbage leachate emergency treatment method according to claim 1, wherein the concentration of dissolved oxygen in the anaerobic ammonia oxidation reaction in the step 3) is controlled to be 0.1-3mg/L, the reaction temperature is 28+/-5 ℃, and the hydraulic retention time is 12-24h.
6. The vehicle-mounted mobile garbage leachate emergency treatment method according to claim 1, wherein the denitrification load of the anaerobic ammoxidation reaction in the step 3) is 1.0 KgN/(m 3. D).
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