CN114524536B - Pretreatment process of landfill leachate - Google Patents
Pretreatment process of landfill leachate Download PDFInfo
- Publication number
- CN114524536B CN114524536B CN202210006743.4A CN202210006743A CN114524536B CN 114524536 B CN114524536 B CN 114524536B CN 202210006743 A CN202210006743 A CN 202210006743A CN 114524536 B CN114524536 B CN 114524536B
- Authority
- CN
- China
- Prior art keywords
- treatment device
- fenton
- electro
- landfill leachate
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000008569 process Effects 0.000 title claims abstract description 45
- 239000000149 chemical water pollutant Substances 0.000 title claims description 36
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000005189 flocculation Methods 0.000 claims abstract description 60
- 230000016615 flocculation Effects 0.000 claims abstract description 54
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 41
- 230000003647 oxidation Effects 0.000 claims abstract description 30
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 29
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000004062 sedimentation Methods 0.000 claims abstract description 13
- 230000001112 coagulating effect Effects 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 36
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 239000000701 coagulant Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 12
- 238000001556 precipitation Methods 0.000 claims description 8
- NJFMNPFATSYWHB-UHFFFAOYSA-N ac1l9hgr Chemical compound [Fe].[Fe] NJFMNPFATSYWHB-UHFFFAOYSA-N 0.000 claims description 7
- 238000005345 coagulation Methods 0.000 claims description 5
- 230000015271 coagulation Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 14
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011574 phosphorus Substances 0.000 abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 17
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- -1 suspended matters Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 8
- 238000005273 aeration Methods 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003814 drug Substances 0.000 description 6
- 239000008394 flocculating agent Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000010668 complexation reaction Methods 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 230000010718 Oxidation Activity Effects 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000002639 bone cement Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000010457 zeolite Substances 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F1/5209—Regulation methods for flocculation or precipitation
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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]
-
- 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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- 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
- C02F2209/11—Turbidity
-
- 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
- C02F2209/14—NH3-N
-
- 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
- C02F2209/18—PO4-P
-
- C—CHEMISTRY; METALLURGY
- 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
-
- 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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
Abstract
The invention discloses a garbage leachate pretreatment process, which adopts a combined process of electric flocculation, electro-Fenton, ozone oxidation and coagulating sedimentation to pretreat the garbage leachate, so that not only can synchronous removal of suspended matters, COD, ammonia nitrogen, total phosphorus, turbidity and other pollutants in wastewater be realized, but also the biodegradability of the wastewater can be improved, and the subsequent treatment load is reduced.
Description
Technical Field
The invention relates to a pretreatment process of landfill leachate, and belongs to the technical field of landfill leachate pretreatment.
Background
Household garbage refers to solid garbage generated by people in daily life or in activities for providing services for daily life, and solid waste regarded as household garbage is regulated by laws and administrative laws. The main source of domestic garbage in China is urban domestic garbage, and the production of domestic garbage in China is greatly increased along with the development of town, so that the problems of environmental pollution and the like are brought into wide attention of various social circles. Household garbage is generally divided into four major categories: can recycle garbage, kitchen garbage, harmful garbage and other garbage. At present, common treatment methods of household garbage mainly comprise landfill, incineration, composting and recycling. The first three items occupy a large amount of land resources, and along with infiltration and infiltration of rainwater, a large amount of landfill leachate is generated, so that underground water resources and resident health are seriously endangered. Because the landfill leachate has great harm to the environment, the pollutant blacklist is put into the environment priority control by China, and the treatment and degradation of the landfill leachate also becomes a hot spot for research of various scientific research communities and institutions.
Compared with common urban sewage, the landfill leachate has more complex composition components, more heavy metal types, higher content and high organic matter content, and the water quality of the landfill leachate is greatly changed due to different areas and generated scenes. Therefore, when the garbage leachate treatment process is selected, corresponding countermeasures are formulated according to different component characteristics of the leachate so as to obtain an ideal treatment effect.
At present, the treatment process of the landfill leachate is more, but a biological method is often used, so that the investment and the operation cost are reduced. However, the garbage leachate has the characteristics of complex components, high content of organic pollutants and ammonia nitrogen, high salinity, large water quality change, poor biodegradability and the like, and can be subjected to subsequent biological treatment only by pretreatment. The traditional garbage leachate pretreatment scheme mostly adopts an adsorption method, solid garbage with a certain shape is filtered out through a grid net, and heavy metal ions and partial organic matters in the leachate are adsorbed by using adsorbents such as active carbon, silica gel, zeolite molecular sieve and the like. However, pretreatment of the percolate by the adsorbent can generate a large amount of waste adsorbent, and secondary pollution is easily caused if the secondary harmless treatment is not performed. In addition, the traditional treatment method is relatively high in cost due to large reagent addition amount, and the treated sewage often cannot solve the problems of high salinity and high ammonia nitrogen content and cannot meet the requirements of subsequent biochemical treatment. Therefore, a pretreatment process of landfill leachate needs to be found, so that the pretreated effluent meets the requirement of subsequent biochemical treatment.
Disclosure of Invention
Aiming at the problems existing in the prior art, the first aim of the invention is to provide a landfill leachate treatment process, which adopts the combined process of electric flocculation, ozone oxidation, electro-Fenton and coagulating sedimentation to pretreat the landfill leachate, so that not only can the synchronous removal of pollutants such as suspended matters, COD, ammonia nitrogen, total phosphorus, turbidity and the like in the wastewater be realized, but also the biodegradability of the wastewater can be improved, and the subsequent treatment load can be reduced.
In order to achieve the technical aim, the invention provides a pretreatment process of landfill leachate, which comprises the following steps:
(1) Filtering and pre-separating the landfill leachate, and then entering an electric flocculation treatment device for electric flocculation treatment;
(2) The effluent of the electric flocculation treatment device enters an ozone oxidation treatment device to carry out ozone oxidation reaction;
(3) The effluent of the ozone oxidation treatment device enters an electro-Fenton treatment device for electro-Fenton reaction after the pH value is adjusted;
(4) And (3) enabling the effluent of the electro-Fenton treatment device to enter a flocculation precipitation treatment device to carry out coagulating sedimentation with a coagulant after the pH value is adjusted, wherein the effluent of the flocculation precipitation treatment device is the garbage leachate after pretreatment.
The invention is easy to useThe key point of the pretreatment process of the garbage leachate is that the electric flocculation and the ozone oxidation are combined, ozone has the effect of strengthening the electric flocculation, more hydroxide flocs can be generated, the pollutant adsorption removal effect and the reaction rate are improved, the ozone tail gas and oxygen generated by the decomposition of the ozone tail gas can be utilized to play the roles of aeration stirring and pre-oxidation strengthening coagulation, and ferrous ions generated by the electric flocculation can be used as an ozone oxidation catalyst to promote the generation of hydroxyl free radicals in the ozone oxidation process, so that the ozone oxidation effect is improved. In the electro-Fenton process, residual ozone and oxygen in the ozone tail gas promote hydroxyl free radicals and H by utilizing ferrous ions generated by electro-Fenton 2 O 2 The reaction rate is improved, the oxidability of the electro-Fenton process can be enhanced, and the organic matters are decomposed more thoroughly.
The invention relates to an ozone oxidation treatment device, an electro-Fenton treatment device and a flocculation precipitation treatment device, which are used for intensively treating sediment, scum and other insoluble matters through collection.
As a preferable scheme, the COD concentration of the landfill leachate is 2000-20000 mg/L, the ammonia nitrogen concentration is 500-2000 mg/L, the TP concentration is 20-50 mg/L, and the SS concentration is 1000-4000 mg/L.
As a preferred scheme, the filtering in the pre-separation is at least one of grid filtering, basket filtering and filter screen filtering. The pretreatment adopts physical filtration, mainly removes large-particle garbage and insoluble matters in the percolate, and prevents accumulation and blockage in the subsequent treatment process.
As a preferred embodiment, the electroflocculation process uses an iron-iron electrode, a graphite-iron electrode or an iron-aluminum electrode as the electrode pair.
As a preferable scheme, the electric flocculation process adopts at least one of a direct current power supply, an alternating current power supply and a pulse power supply.
As a preferable scheme, the electric flocculation process has a current density of 5-50 mA/cm 2 The distance between the polar plates is 1-5 cm, and the electrolysis time is 10-120 min.
As a preferable scheme, the solid-liquid separation is carried out by adopting a slag scraping machine.
As a preferred embodiment, the electroflocculation process uses an iron-iron electrode. The electroflocculation has four functions of electrooxidation, electroreduction, electroflotation and electroflocculation, and can remove insoluble impurities such as garbage fragments, suspended matters and the like in the percolate and soluble impurities such as organic matters, heavy metals, phosphorus and the like in the wastewater. In addition, because the salinity in the percolate is higher, the charge density is high, the electric flocculation is facilitated, and the energy consumption for the electric flocculation is reduced. The electric flocculation adopts an iron electrode, and the iron flocs generated in the reaction process not only can play a role in flocculation, but also can enter an electric Fenton device to serve as an iron ion source to promote Fenton reaction.
As a preferable scheme, the ozone required by the ozone oxidation reaction is derived from an ozone generator, and a gas source used by the ozone generator is at least one of air and oxygen.
As a preferable scheme, the ozone oxidation reaction time is 10-120 min, and the ozone addition amount is 0.1-2 g/gCOD. Catalysts such as alumina, molecular sieves, activated carbon, ceramsite and the like can also be added in the ozone oxidation reaction, so that the oxidation rate is accelerated, and the oxidation activity is enhanced. The main purpose of ozone oxidation is to remove substances such as ammonia nitrogen, chromaticity, organic matters and the like. The addition of the catalyst in the ozone oxidation reaction increases the gas-liquid contact area, accelerates the ozone aeration process, can effectively reduce the ozone oxidation reaction time and reduce the ozone consumption. In addition, the ozone tail gas can be directly discharged into the electro-Fenton treatment device without treatment.
As a preferable scheme, the pH of the ozonized effluent is adjusted to 3-5.
As a preferred embodiment, the electro-Fenton process uses an iron-iron electrode, a graphite-iron electrode or an iron-aluminum electrode as the electrode pair.
The electro-Fenton process adopts at least one of a direct current power supply, an alternating current power supply and a pulse power supply as a power supply.
As a preferable scheme, the current density of the electro-Fenton process is 5-50 mA/cm 2 The distance between the polar plates is 1-5 cm, and the electrolysis time is 10-120 min。
As a preferred solution, the electro-Fenton process uses iron-graphite electrodes as electrode pairs. The electro-Fenton can utilize the iron ions generated by the polar plate in the electro-flocculation to react, and meanwhile, the self anode can also generate the iron ions, so that the additional iron ions are not required to be added. Ozone tail gas is directly introduced into the electro-Fenton treatment device, and at the initial stage of the reaction, the ozone and the anode of the device generate Fe 2+ React to generate oxygen and hydroxyl radical, and generate trace H on the cathode 2 O 2 . H generated at the cathode as the reaction proceeds 2 O 2 The accumulation becomes more and the Fenton reaction rate gradually increases. In addition, the continuous stirring reaction liquid of the ozone tail gas objectively accelerates the reaction rate, and ozone in the ozone tail gas can be combined with H 2 O 2 More hydroxyl radicals are generated, and the oxidation efficiency is enhanced, so that hydrogen peroxide and other Fenton reagents are not needed to be added in the electro-Fenton process.
As a preferred embodiment, the electro-Fenton effluent is pH-neutral.
As a preferred scheme, the coagulant comprises a coagulant and a coagulant aid, wherein the preferred coagulant is one of ferric salt, aluminum salt, polyiron and polyaluminum, and the preferred coagulant aid is one of polyacrylamide, sodium alginate, diatomite and bone cement. The coagulant can quickly adsorb decomposed molecular fragments in the electro-Fenton effluent to coagulate the molecular fragments into flocs, but because the flocs are loose and inconvenient for subsequent operation, the flocculation effect is improved by adding the coagulant aid, and the loose flocs are changed into dense large-group sediment, so that the subsequent operation is convenient.
As a preferable scheme, the adding amount of the coagulant is 100-1000 mg/L, and the adding amount of the coagulant aid is 2-20 mg/L.
As a preferable scheme, the mixing process adopts a mode of stirring at a rapid speed and then stirring at a slow speed, wherein the rapid stirring speed is 180-300 r/min, the time is 5-20 min, the slow stirring speed is 90-150 r/min, and the time is 10-30 min.
As a preferable scheme, the standing time is 10-40 min.
The invention also provides a pretreatment system for the landfill leachate pretreatment process, which mainly comprises the following devices: the device comprises an electric flocculation treatment device, an ozone oxidation treatment device, an electric Fenton treatment device and a flocculation precipitation treatment device, wherein the devices are sequentially connected through pipelines, and the electric flocculation treatment device and the electric Fenton treatment device are connected with an external power supply.
As a preferable scheme, the electric flocculation treatment device and the electro-Fenton treatment device share one power supply, and the ozone oxidation treatment device is respectively connected with the electric flocculation treatment device and the ozone oxidation device by adopting distributed control.
The electric flocculation and the electric Fenton treatment processes adopt the same current and voltage specifications, can share the same power supply, reduces the cost investment, and the ozone oxidation treatment device is divided into two parts, so that the ozone oxidation treatment device can be coupled with the electric flocculation to perform the effect of reinforcing coagulation, can be coupled with the electric Fenton to perform the coupling reaction, promote the generation of hydroxyl free radicals, strengthen the treatment effect of the electric Fenton, simultaneously perform the aeration and stirring effects and promote H 2 O 2 Is produced and Fenton reaction is carried out.
The system adopted by the garbage leachate pretreatment process consists of four main parts, namely an electric flocculation treatment device, an ozone oxidation treatment device, an electric Fenton treatment device and a flocculation precipitation treatment device. The ozone oxidation system is in distributed control, the electric flocculation and the electro-Fenton treatment device share the same power supply, the equipment cost is reduced, and the treatment system has the advantages of good treatment effect, low medicament addition amount, strong applicability, low operation cost, simple process and the like.
Compared with the prior art, the technical scheme of the invention has the beneficial technical effects that:
1) The invention adopts the combined technology of electric flocculation, electro-Fenton, ozone oxidation and coagulating sedimentation to pretreat the landfill leachate, improves the biodegradability of the landfill leachate, and reduces the subsequent treatment load. High salinity is extremely disadvantageous for biodegradation, but is indeed advantageous for electroflocculation and electro-Fenton reaction, and the high charge density caused by high salinity can improve the overall conductivity of the percolate and improve the current efficiency.
2) The electro-Fenton method adopted by the invention does not need to add ferrous salt, hydrogen peroxide and other Fenton additives. The iron flocs generated in the electric flocculation process not only play a role in flocculation and precipitation, but also can provide a large amount of iron ions as raw materials for the electro-Fenton reaction. The addition of ozone can also promote the electro-Fenton reaction, promote the generation of hydrogen peroxide and hydroxyl free radicals, strengthen the oxidation efficiency and play a role in stirring and aeration.
3) The floccule and tail gas generated in the previous treatment device can be used as reaction raw materials or accelerators of the next treatment device. The iron flocs generated by the electric flocculation reaction can be used as an electric Fenton reaction raw material, the ozone reaction tail gas can be used as an electric Fenton reaction accelerator, and the electric Fenton iron mud and the iron flocs generated by the electric Fenton reaction can be used as a coagulant for the coagulation deposition reaction. The process has high integration level, simple and convenient flow and easy operation.
4) The percolate pretreatment system provided by the invention adopts a modularized structure, each module has the connection property and the independence, and adopts a distributed control scheme for the ozone treatment device, and the system is respectively connected with the electric flocculation and electro-Fenton reaction device to play a role in strengthening oxidization. The garbage leachate pretreatment process provided by the invention can realize continuous treatment by running the system, and has the advantages of low medicament addition amount, strong adaptability, low cost, good treatment effect and the like.
Drawings
FIG. 1 is a process flow diagram of a landfill leachate pretreatment process according to the present invention.
Detailed Description
The invention is further illustrated by way of example, and it will be apparent that the embodiments described are merely some, but not all, of the embodiments of the invention and are not intended to limit the invention to the embodiments described. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
A pretreatment system for landfill leachate, comprising the steps of:
(1) Electric flocculation: taking garbage percolate with COD concentration of 5000mg/L, ammonia nitrogen concentration of 1000mg/L, TP concentration of 40mg/L and SS concentration of 2000mg/L, firstly, screening the garbage percolate, then, feeding the garbage percolate into an electric flocculation device, wherein the COD concentration of the garbage percolate is 5000mg/L, the ammonia nitrogen concentration of 1000mg/L and the TP concentration of 40mg/L, carrying out electric flocculation treatment under the action of a direct current power supply and an iron-iron cathode-anode plate, removing pollutants such as suspended matters, COD, total phosphorus, heavy metal ions and the like by utilizing flocculating agents generated by hydrolysis, complexation and the like in the electric flocculation process, and the electric flocculation current density is 15mA/cm 2 The distance between the polar plates is 1cm, the electrolytic reaction is carried out for 30min, and the electric flocculation reaction is carried out, and scum is removed by a scum scraper to obtain electric flocculation effluent;
(2) Ozone oxidation: the electric flocculation effluent is subjected to ozone oxidation reaction under the action of an ozone generator and an ozone aeration device, the ozone adding amount is 1g/gCOD, the ozone reaction time is 30min, and substances such as ammonia nitrogen, chromaticity, organic matters and the like are removed by utilizing ozone, so that ozone oxidation effluent is obtained.
The ozone aeration device is divided into two parts for separate control. Part of the wastewater is subjected to coupling reaction with electric flocculation to achieve the effect of strengthening coagulation, and part of the wastewater is subjected to coupling reaction with electric Fenton to promote the generation of hydroxyl free radicals to achieve the effect of strengthening treatment of electric Fenton, and meanwhile, the wastewater can be aerated and stirred without an ozone tail gas treatment system;
(3) Electro Fenton: the pH of ozone oxidation effluent is regulated to 4 by adding hydrochloric acid and sodium hydroxide, wastewater enters an electro-Fenton device to be subjected to electro-Fenton treatment under a direct-current power supply and an iron-graphite cathode-anode plate, the reaction is carried out for 60min, organic matters, ammonia nitrogen and the like of the wastewater are removed by utilizing hydroxyl radicals generated by the electro-Fenton reaction, and iron ions generated by the iron plate and H generated by the graphite plate are utilized 2 O 2 The reaction is carried out without adding ferrous reagent and hydrogen peroxide, and meanwhile, under the condition of electrifying, ozone can play a role in aeration and stirring and promote H 2 O 2 Is also not required to be generatedAdding hydrogen peroxide;
(4) Coagulating sedimentation: firstly, adjusting pH of the electro-Fenton effluent to be neutral, then firstly adding PAC into the electro-Fenton effluent, stirring for 10min under the stirring action of stirring speed of 210r/min to react, then adding PAM, stirring for 20min under the stirring action of stirring speed of 120r/min to react, uniformly mixing the medicament and the wastewater, and removing suspended matters by utilizing the effects of adsorption, bridging and the like of a flocculating agent. In the coagulating sedimentation, the iron flocs generated in the electric flocculation and the electric Fenton can be used as flocculating agents, so that the dosage of the medicament is reduced. Standing for 30min after stirring, and allowing the coagulating sedimentation effluent to enter a biochemical treatment system of the A2O-MBR for subsequent treatment, wherein the sediment, scum and the like in the step (1), the step (3) and the step (4) are subjected to centralized treatment.
Comparative example
A pretreatment system for landfill leachate, comprising the steps of:
(1) Electric flocculation: taking landfill leachate with COD concentration of 5000mg/L, ammonia nitrogen concentration of 1000mg/L and TP concentration of 40mg/L, firstly, screening the landfill leachate, then, feeding the landfill leachate into an electric flocculation device, wherein the COD concentration of the landfill leachate is 5000mg/L, the ammonia nitrogen concentration is 1000mg/L, the TP concentration is 40mg/L, performing electric flocculation treatment under the action of an alternating current power supply and an iron-iron cathode-anode plate, removing pollutants such as suspended matters, COD, total phosphorus, heavy metal ions and the like by utilizing flocculating agents generated by hydrolysis, complexation and the like in the electric flocculation process, and the electric flocculation current density is 15mA/cm 2 The distance between the polar plates is 1cm, the electrolytic reaction is carried out for 30min, and the electric flocculation reaction is carried out, and scum is removed by a scum scraper to obtain electric flocculation effluent;
(2) Electro Fenton: the pH of the electric flocculation effluent is regulated to 4 by adding hydrochloric acid and sodium hydroxide, the wastewater enters an electric Fenton device to be subjected to electric Fenton treatment under an alternating current power supply and an iron-graphite cathode-anode plate, the reaction is carried out for 60min, the hydroxyl radicals generated by the electric Fenton reaction are utilized to remove organic matters, ammonia nitrogen and the like of the wastewater, and the iron ions generated by the iron plate and the H generated by the graphite plate are utilized 2 O 2 The reaction is carried out without adding ferrous reagent and hydrogen peroxide;
(3) Ozone oxidation: and (3) carrying out ozone oxidation reaction on the electro-Fenton effluent under the action of an ozone generator and an ozone aeration device, wherein the ozone adding amount is 1g/gCOD, the ozone reaction time is 30min, and removing substances such as ammonia nitrogen, chromaticity, organic matters and the like by utilizing ozone to obtain ozone oxidation effluent.
(4) Coagulating sedimentation: firstly, adjusting pH of the electro-Fenton effluent to be neutral, then firstly adding PAC into the electro-Fenton effluent, stirring for 10min under the stirring action of 210r/min for reaction, then adding PAM, stirring for 20min under the stirring action of 210r/min for reaction, uniformly mixing the medicament and the wastewater, and removing suspended matters by utilizing the effects of adsorption, bridging and the like of a flocculating agent. In the coagulating sedimentation, the iron flocs generated in the electric flocculation and the electric Fenton can be used as flocculating agents, so that the dosage of the medicament is reduced, and even the coagulant is not required to be added. Standing for 30min after stirring, and allowing the coagulating sedimentation effluent to enter a biochemical treatment system of the A2O-MBR for subsequent treatment, wherein the sediment, scum and the like in the step (1), the step (3) and the step (4) are subjected to centralized treatment.
The coagulating sedimentation water produced in the examples and comparative examples was examined, and the results are shown in the following table. The embodiment 1 has better pretreatment effect on landfill leachate, and can meet the water inlet requirement of a subsequent biochemical treatment system.
Table 1 Water quality conditions of the inlet and outlet waters of each process in examples and comparative examples
The foregoing is only the preferred embodiments of the present invention, and all technical solutions falling under the concept of the present invention fall within the scope of the present invention. It should be noted that variations, modifications and adaptations to the present invention may occur to one skilled in the art without departing from the spirit and scope thereof and are intended to be included within the scope of the present invention.
Claims (7)
1. A pretreatment process of landfill leachate is characterized in that: the method comprises the following steps:
(1) Filtering and pre-separating the landfill leachate, and then entering an electric flocculation treatment device for electric flocculation treatment;
(2) The effluent of the electric flocculation treatment device enters an ozone oxidation treatment device to carry out ozone oxidation reaction;
(3) The effluent of the ozone oxidation treatment device enters an electro-Fenton treatment device for electro-Fenton reaction after the pH value is adjusted;
(4) The effluent of the electro-Fenton treatment device enters a flocculation precipitation treatment device to carry out coagulating sedimentation with a coagulant after the pH value is adjusted, and the effluent of the flocculation precipitation treatment device is the garbage leachate after pretreatment;
the current density in the electric flocculation treatment process is 5-50 mA/cm 2 The distance between the polar plates is 1-5 cm, and the electrolysis time is 10-120 min;
the time of the ozone oxidation reaction is 10-120 min, and the ozone adding amount is 0.1-2 g/gCOD;
the current density in the electro-Fenton reaction process is 5-50 mA/cm 2 The distance between the polar plates is 1-5 cm, and the electrolysis time is 10-120 min;
the coagulation sedimentation process adopts a gradient stirring mode that the stirring speed is firstly high and then low, the rapid stirring speed is 180-300 r/min, the time is 5-20 min, the slow stirring speed is 90-150 r/min, and the time is 10-30 min.
2. A process for the pretreatment of landfill leachate according to claim 1, wherein: the COD concentration of the landfill leachate is 2000-20000 mg/L, the ammonia nitrogen concentration is 500-2000 mg/L, the TP concentration is 20-50 mg/L, and the SS concentration is 1000-4000 mg/L.
3. A process for the pretreatment of landfill leachate according to claim 1, wherein: at least one filtering mode of grid filtering, basket filtering and filter screen filtering is adopted in the filtering and pre-separating process.
4. A process for the pretreatment of landfill leachate according to claim 1, wherein:
the electric flocculation treatment process adopts an iron-iron electrode, a graphite-iron electrode or an iron-aluminum electrode as an electrode pair, and the power supply is a direct current power supply, an alternating current power supply or a pulse power supply.
5. A process for the pretreatment of landfill leachate according to claim 1, wherein:
the pH value of the effluent of the ozone oxidation treatment device is regulated to 3-5.
6. A process for the pretreatment of landfill leachate according to claim 1, wherein:
the electro-Fenton reaction process adopts an iron-iron electrode, a graphite-iron electrode or an iron-aluminum electrode as an electrode pair, and the power supply is a direct current power supply, an alternating current power supply or a pulse power supply.
7. A process for the pretreatment of landfill leachate according to claim 1, wherein:
and the pH of the effluent of the electro-Fenton treatment device is regulated to be neutral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006743.4A CN114524536B (en) | 2022-01-05 | 2022-01-05 | Pretreatment process of landfill leachate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006743.4A CN114524536B (en) | 2022-01-05 | 2022-01-05 | Pretreatment process of landfill leachate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114524536A CN114524536A (en) | 2022-05-24 |
| CN114524536B true CN114524536B (en) | 2023-11-21 |
Family
ID=81621345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210006743.4A Active CN114524536B (en) | 2022-01-05 | 2022-01-05 | Pretreatment process of landfill leachate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114524536B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259487B (en) * | 2022-07-27 | 2024-01-23 | 四川天宇油脂化学有限公司 | Industrial wastewater treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110589938A (en) * | 2019-10-14 | 2019-12-20 | 四川大学 | Method for treating toxic and nondegradable wastewater by coupling electrolysis-ozone-corrosion inhibitor/electrolysis-ozone-hydrogen peroxide-corrosion inhibitor |
| CN210528671U (en) * | 2019-08-30 | 2020-05-15 | 南京友智科技有限公司 | electro-Fenton-electro-flocculation integrated device |
| CN212559577U (en) * | 2020-06-05 | 2021-02-19 | 四川大学 | Electric flocculation-catalysis ozone/hydrogen peroxide water reactor |
| CN113371798A (en) * | 2021-06-10 | 2021-09-10 | 华中师范大学 | Method for removing chemical oxygen demand in wastewater through ozone coupled electro-Fenton catalysis |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3078899B1 (en) * | 2018-03-14 | 2021-03-05 | Univ Paris Est Marne La Vallee | ACTIVATED CARBON REGENERATION PROCESS BY ELECTRO-FENTON PROCESS |
-
2022
- 2022-01-05 CN CN202210006743.4A patent/CN114524536B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210528671U (en) * | 2019-08-30 | 2020-05-15 | 南京友智科技有限公司 | electro-Fenton-electro-flocculation integrated device |
| CN110589938A (en) * | 2019-10-14 | 2019-12-20 | 四川大学 | Method for treating toxic and nondegradable wastewater by coupling electrolysis-ozone-corrosion inhibitor/electrolysis-ozone-hydrogen peroxide-corrosion inhibitor |
| CN212559577U (en) * | 2020-06-05 | 2021-02-19 | 四川大学 | Electric flocculation-catalysis ozone/hydrogen peroxide water reactor |
| CN113371798A (en) * | 2021-06-10 | 2021-09-10 | 华中师范大学 | Method for removing chemical oxygen demand in wastewater through ozone coupled electro-Fenton catalysis |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114524536A (en) | 2022-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2010508135A (en) | Advanced treatment method and apparatus for sewage that does not discharge sludge | |
| CN105906142B (en) | A kind of landfill leachate advanced treatment system and processing method | |
| CN102730862B (en) | Sewage treatment method in synthetic rubber production | |
| CN108996821B (en) | Treatment system and treatment method for landfill leachate | |
| Yu et al. | A review on the landfill leachate treatment technologies and application prospects of three-dimensional electrode technology | |
| CN110002639B (en) | Device and method for treating landfill leachate of middle and late-stage domestic garbage landfill | |
| CN106554126A (en) | A kind of reverse osmosis concentrated water depth standard processing method and system | |
| CN106277555A (en) | The high efficiency, low cost processing method of a kind of coking chemical waste water and system | |
| CN111253016A (en) | Treatment system and method for landfill leachate | |
| CN104478171A (en) | Reusing treatment method and system for municipal wastewater | |
| CN101700949B (en) | Waste leachate purification process method | |
| CN114524536B (en) | Pretreatment process of landfill leachate | |
| CN111606519A (en) | Advanced treatment method for electroplating wastewater | |
| CN111547938B (en) | Electrochemical dephosphorization treatment process for wastewater | |
| CN104787985A (en) | Sewage treatmentmethod | |
| CN205473191U (en) | Domestic waste filtration liquid sewage treatment system | |
| CN112939352A (en) | Treatment method of comprehensive sewage of industrial park | |
| CN112520913A (en) | Pretreatment process for treating refractory organic wastewater by electric flocculation | |
| CN108623096B (en) | Treatment process of high-concentration degradation-resistant sewage | |
| CN111115919A (en) | Pretreatment method of pharmaceutical wastewater | |
| CN116119888A (en) | Combined treatment system and treatment method for post-concentration liquid of landfill leachate membrane | |
| CN111439897B (en) | Economical electrochemical dephosphorization process | |
| CN112390428A (en) | Landfill leachate MBR effluent treatment method | |
| CN105776684A (en) | Urban sewage treatment and resource recycling method | |
| CN106746355B (en) | Method for effectively releasing phosphorus and organic matters from coagulant flocs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |