CN112479485A - Heavy metal treatment method for landfill leachate - Google Patents
Heavy metal treatment method for landfill leachate Download PDFInfo
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- CN112479485A CN112479485A CN202011230188.0A CN202011230188A CN112479485A CN 112479485 A CN112479485 A CN 112479485A CN 202011230188 A CN202011230188 A CN 202011230188A CN 112479485 A CN112479485 A CN 112479485A
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- leachate
- coagulating sedimentation
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 35
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 21
- 238000004062 sedimentation Methods 0.000 claims abstract description 22
- 230000001112 coagulating effect Effects 0.000 claims abstract description 21
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 241000894006 Bacteria Species 0.000 claims description 9
- 239000000701 coagulant Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000003344 environmental pollutant Substances 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 231100000719 pollutant Toxicity 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002957 persistent organic pollutant Substances 0.000 claims description 6
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims description 5
- 238000005345 coagulation Methods 0.000 claims description 5
- 230000015271 coagulation Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000006722 reduction reaction Methods 0.000 claims description 4
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 4
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 4
- BYGYBSHPLSVNGL-UHFFFAOYSA-K trisodium trithiocyanate Chemical compound [Na+].[Na+].[Na+].[S-]C#N.[S-]C#N.[S-]C#N BYGYBSHPLSVNGL-UHFFFAOYSA-K 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 230000004071 biological effect Effects 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000003301 hydrolyzing effect Effects 0.000 claims description 3
- 229920002521 macromolecule Polymers 0.000 claims description 3
- 244000005700 microbiome Species 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 235000005985 organic acids Nutrition 0.000 claims description 3
- 125000001741 organic sulfur group Chemical group 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 230000029219 regulation of pH Effects 0.000 claims description 3
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 3
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 230000000696 methanogenic effect Effects 0.000 claims description 2
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 2
- 239000013043 chemical agent Substances 0.000 abstract description 5
- 239000010802 sludge Substances 0.000 abstract description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
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
- C02F1/52—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
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- 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
- C02F2101/20—Heavy metals or heavy metal 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- 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
- C02F3/1205—Particular type of activated sludge processes
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
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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)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
In order to overcome the existing problems, the heavy metal treatment method of the landfill leachate provided by the invention adopts a secondary UASB system and an MBR system to treat the leachate, and then the leachate is subjected to coagulating sedimentation treatment, so that the heavy metal removal rate reaches more than 95%, the chemical agent dosage is small, the sludge amount is less, and the secondary pollution caused by the simple biochemical treatment method is effectively avoided. Meanwhile, compared with a method for treating heavy metal by adopting a coagulating sedimentation method, the heavy metal removal rate is about 45 percent higher, the use cost of chemical agents and the cost of sludge treatment are also greatly reduced, the method is economical and practical for removing heavy metal in percolate, and each heavy metal effluent index meets the requirement in table 2 of GB16889-2008 'pollution control Standard for domestic refuse landfill'. Effectively avoiding the influence on the environment caused by the heavy metal in the landfill leachate.
Description
Technical Field
The invention relates to a sewage treatment method, in particular to a heavy metal treatment method for landfill leachate.
Background
The landfill leachate refers to high-concentration organic wastewater generated in the process of stacking and burying the garbage. With the increase of national development and population and the acceleration of urbanization process, the amount of domestic garbage generated is increasing day by day, according to the 8.7 requirement in the standard for controlling pollution of domestic garbage incineration GB18485-2014, after the garbage leachate is treated in a domestic garbage incineration plant, the concentration of pollutants such as total mercury, total cadmium, total chromium, hexavalent chromium, total arsenic, total lead and the like can be conveyed to the municipal sewage treatment plant for treatment until the concentration of the pollutants reaches the requirement specified in the standard for controlling domestic garbage landfill GB16889 table 2. Heavy metals in the landfill leachate are difficult to remove, and are discharged into the environment without treatment, so that the environment and human bodies are seriously affected, and heavy metal ions are difficult to remove after entering the human bodies through the air, water and food chains, are accumulated in human organs, and have great harm to the human bodies and the environment. The current common treatment process methods of the landfill leachate heavy metals include an adsorption method, a coagulating sedimentation method, a membrane separation technology, an ion exchange method, a biochemical treatment method and the like. The respective advantages and disadvantages are as follows:
heavy metal removal process
In the prior art, the above methods are implemented independently, so that the methods have obvious defects respectively.
Disclosure of Invention
In order to solve the problems in the prior art, the heavy metal treatment method of the landfill leachate provided by the invention adopts a secondary UASB system and an MBR system to treat the leachate, and then the leachate is subjected to coagulating sedimentation treatment, so that the heavy metal removal rate reaches over 95%, the chemical agent consumption is low, the sludge production is low, and the secondary pollution caused by the simple biochemical treatment method is effectively avoided. Meanwhile, the removal rate of the heavy metal is about 45% higher than that of the heavy metal treated by a coagulation precipitation method, and the problems in the prior art can be effectively solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a heavy metal treatment method of landfill leachate is characterized by comprising a biochemical treatment step and a coagulating sedimentation step which are sequentially carried out,
the biochemical treatment step comprises the following steps in sequence:
step 1: sequentially carrying out primary UASB anaerobic treatment and secondary UASB anaerobic treatment,
the waste leachate enters an anaerobic reactor, hydrolytic bacteria, acid-producing bacteria and methanogenic bacteria in the reactor perform biological activities by utilizing organic pollutants in water, indissolvable organic pollutants in the water are firstly decomposed into soluble macromolecular substances, then are decomposed into micromolecular organic acids and finally are decomposed into micromolecular substances such as carbon dioxide, methane, water and the like to realize the removal of the pollutants,
step 2: performing membrane treatment on the MBR membrane,
the leachate from the secondary UASB system firstly enters a facultative tank and then enters an MBR system for treatment, the ammonia nitrogen and organic matters in the landfill leachate are removed by aerobic microorganisms,
the coagulating sedimentation step comprises the following steps:
and (4) enabling percolate from the MBR system to sequentially enter a reduction reaction tank and a coagulating sedimentation tank for coagulation treatment.
Preferably, the retention time of the landfill leachate in the biochemical treatment step is 10 days.
Preferably, the retention time of the landfill leachate in the facultative tank is 1 day, and the retention time in the MBR system is 2 days.
Preferably, in the coagulating sedimentation step, the coagulant aid adopts organic sulfur solution, the adding concentration is 70mg/L, sodium metabisulfite is adopted as a reducing agent to mainly reduce hexavalent chromium, the adding ratio is 4:1, and the reaction time is 30 min; the PH regulation adopts diluted sulfuric acid and sodium hydroxide solution, and the dosage is controlled by a PH meter; the coagulant is PAC solution, the adding amount is 140mg/l, the adding amount of the matched PAM is 5mg/l, and the settling time is 20 min.
Preferably, in the coagulating sedimentation step, an aqueous solution of trisodium trithiocyanate, sodium sulfide and calcium hydroxide are used as coagulant aids for capturing other heavy metals.
The invention has the beneficial effects that: according to the heavy metal treatment method for the landfill leachate, the leachate is treated by the two-stage UASB system and the MBR system and then is subjected to coagulating sedimentation treatment, so that the heavy metal removal rate is over 95 percent, the chemical agent consumption is low, the sludge production is low, and the secondary pollution caused by the simple biochemical treatment method is effectively avoided. Meanwhile, compared with a method for treating heavy metal by adopting a coagulating sedimentation method, the heavy metal removal rate is about 45 percent higher, the use cost of chemical agents and the cost of sludge treatment are also greatly reduced, the method is economical and practical for removing heavy metal in percolate, and each heavy metal effluent index meets the requirement in table 2 of GB16889-2008 'pollution control Standard for domestic refuse landfill'. Effectively avoiding the influence on the environment caused by the heavy metal in the landfill leachate.
Drawings
FIG. 1 is a process flow diagram of one embodiment of the present invention.
Detailed Description
FIG. 1 is a process flow diagram of one embodiment of the present invention. In the figure, the heavy metal treatment method of the landfill leachate comprises the steps of biochemical treatment and coagulating sedimentation in sequence,
the biochemical treatment step comprises the following steps in sequence:
step 1: sequentially carrying out primary UASB anaerobic treatment and secondary UASB anaerobic treatment.
The waste leachate enters an anaerobic reactor, hydrolytic bacteria, acid-producing bacteria and methane-producing bacteria in the reactor perform biological activities by utilizing organic pollutants in water, and indissolvable organic pollutants in the water are firstly decomposed into soluble macromolecular substances, then decomposed into micromolecular organic acids and finally decomposed into micromolecular substances such as carbon dioxide, methane, water and the like, so that the pollutants are removed, but indexes of total chromium and total mercury still exceed standards. The designed residence time for this step was 10 days.
Step 2: performing membrane treatment on the MBR membrane,
the effluent of the secondary UASB system firstly enters a facultative tank and then enters an MBR system for treatment, and aerobic microorganisms are utilized to remove ammonia nitrogen and organic matters in the garbage leachate. All pollutants are greatly reduced, but the stability of the total chromium index of MBR effluent is poor, so that the stable standard of the total chromium of the effluent is difficult to ensure. The residence time in the facultative tank is 1 day, and the residence time in the MBR system is 2 days.
The coagulating sedimentation step comprises the following steps:
and (4) enabling percolate from the MBR system to sequentially enter a reduction reaction tank and a coagulating sedimentation tank for coagulation treatment.
In the coagulating sedimentation step, an organic sulfur solution is adopted as a coagulant aid, the adding concentration is 70mg/L, sodium pyrosulfite is adopted as a reducing agent to mainly reduce hexavalent chromium, the adding ratio is 4:1, and the reaction time is 30 min; the PH regulation adopts diluted sulfuric acid and sodium hydroxide solution, and the dosage is controlled by a PH meter; the coagulant is PAC solution (polyaluminium chloride), the dosage is 140mg/l, the dosage of the matched PAM (polyacrylamide) is 5mg/l, and the precipitation time is 20 min.
In the coagulating sedimentation step, trisodium trithiocyanate aqueous solution, sodium sulfide and calcium hydroxide are used as coagulant aids for capturing other heavy metals.
FIG. 1 shows a reduction reaction cell equipped with a pH meter and an ORP meter; adding 15% of H2SO4Adjusting the pH value to 2-3; adding 1g/L sodium pyrosulfite solution (0.5 mg/L), stirring for 10min, and adding agent into the reaction tank to reduce high-valence heavy metal to low-valence (such as reducing hexavalent chromium to trivalent chromium, wherein the toxicity is reduced and the removal is easy).
FIG. 1 shows, in a coagulation sedimentation tank, a pH meter; adding 20% sodium hydroxide solution, and adjusting pH to 9-10; adding 150g/L trisodium trithiocyanate aqueous solution (the adding amount is 70 mg/L), and stirring for 10 min; adding 500mg/L polyacrylamide solution (the adding amount is 5 mg/L), stirring for 10min, and completely precipitating low-valence heavy metal substances by using strong alkaline substances in the tank, thereby effectively removing heavy metal pollutants in the percolate.
Claims (5)
1. A heavy metal treatment method of landfill leachate is characterized by comprising a biochemical treatment step and a coagulating sedimentation step which are sequentially carried out,
the biochemical treatment step comprises the following steps in sequence:
step 1: sequentially carrying out primary UASB anaerobic treatment and secondary UASB anaerobic treatment,
the waste leachate enters an anaerobic reactor, hydrolytic bacteria, acid-producing bacteria and methanogenic bacteria in the reactor perform biological activities by utilizing organic pollutants in water, indissolvable organic pollutants in the water are firstly decomposed into soluble macromolecular substances, then are decomposed into micromolecular organic acids and finally are decomposed into micromolecular substances such as carbon dioxide, methane, water and the like to realize the removal of the pollutants,
step 2: performing membrane treatment on the MBR membrane,
the leachate from the secondary UASB system firstly enters a facultative tank and then enters an MBR system for treatment, the ammonia nitrogen and organic matters in the landfill leachate are removed by aerobic microorganisms,
the coagulating sedimentation step comprises the following steps:
and (4) enabling percolate from the MBR system to sequentially enter a reduction reaction tank and a coagulating sedimentation tank for coagulation treatment.
2. The method as claimed in claim 1, wherein the landfill leachate stays for 10 days in the biochemical treatment step.
3. The method of claim 1, wherein the landfill leachate stays in the facultative tank for 1 day and in the MBR system for 2 days.
4. The method for treating heavy metals in landfill leachate according to claim 1, wherein in the coagulating sedimentation step, the coagulant aid is organic sulfur solution, the adding concentration is 70mg/L, sodium metabisulfite is used as a reducing agent to mainly reduce hexavalent chromium, the adding ratio is 4:1, and the reaction time is 30 min; the PH regulation adopts diluted sulfuric acid and sodium hydroxide solution, and the dosage is controlled by a PH meter; the coagulant is PAC solution, the adding amount is 140mg/l, the adding amount of the matched PAM is 5mg/l, and the settling time is 20 min.
5. The method as claimed in claim 1, wherein in the coagulating sedimentation step, trisodium trithiocyanate aqueous solution, sodium sulfide and calcium hydroxide are used as coagulant aids for capturing other heavy metals.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070003370A1 (en) * | 2005-07-04 | 2007-01-04 | Liao Zhi Min | A method for treating landfill leachate |
| CN102826726A (en) * | 2012-09-25 | 2012-12-19 | 重庆三峰环境产业集团有限公司 | Refuse incineration plant leachate treatment process |
| CN109574372A (en) * | 2017-09-29 | 2019-04-05 | 上海中海龙高新技术研究院 | A kind of processing method of consumer waste infiltration liquid |
| CN209081668U (en) * | 2018-10-24 | 2019-07-09 | 武汉上善清源环保科技有限公司 | Landfill leachate zero-discharge treatment system and organic wastewater treating system |
-
2020
- 2020-11-06 CN CN202011230188.0A patent/CN112479485A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070003370A1 (en) * | 2005-07-04 | 2007-01-04 | Liao Zhi Min | A method for treating landfill leachate |
| CN102826726A (en) * | 2012-09-25 | 2012-12-19 | 重庆三峰环境产业集团有限公司 | Refuse incineration plant leachate treatment process |
| CN109574372A (en) * | 2017-09-29 | 2019-04-05 | 上海中海龙高新技术研究院 | A kind of processing method of consumer waste infiltration liquid |
| CN209081668U (en) * | 2018-10-24 | 2019-07-09 | 武汉上善清源环保科技有限公司 | Landfill leachate zero-discharge treatment system and organic wastewater treating system |
Non-Patent Citations (1)
| Title |
|---|
| 张俊辉等: "生活垃圾沥滤液UASB出水化学沉淀反应中影响总铬去除因素的研究", 《工程建设》 * |
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