CN102515399A - Electrochemical treatment method of sewage - Google Patents
Electrochemical treatment method of sewage Download PDFInfo
- Publication number
- CN102515399A CN102515399A CN2011104166996A CN201110416699A CN102515399A CN 102515399 A CN102515399 A CN 102515399A CN 2011104166996 A CN2011104166996 A CN 2011104166996A CN 201110416699 A CN201110416699 A CN 201110416699A CN 102515399 A CN102515399 A CN 102515399A
- Authority
- CN
- China
- Prior art keywords
- sewage
- electrochemical
- electrochemical treatment
- sludge
- liquid separation
- 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.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010802 sludge Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000005273 aeration Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004062 sedimentation Methods 0.000 abstract description 5
- 239000004575 stone Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 4
- 229910001431 copper ion Inorganic materials 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses an electrochemical treatment method of sewage. After sewage passes through a sedimentation basin and an electrochemical reactor successively, water is separated by solid-liquid separation. Sludge after the solid-liquid separation flows back to the sedimentation basin and is stirred and mixed with the sewage to be treated. According to the invention, the sludge flows back to the sedimentation basin, so as to raise the treatment effect and reduce new environmental pressure generated by sludge landfill treatment. That is killing two birds with one stone.
Description
Technical field
The invention belongs to the environment protection sewage process field, particularly relate to the method for electrochemical treatment sewage.
Background technology
Electrochemical treatment is to use water technology more widely in recent years; Electrochemistry main reaction that rises in water treatment has oxidation, reduction, indirect oxidation, indirect reduction, electricity flocculation, electric floating, electric Fenton effect, can reduce the indexs such as colourity, COD of sewage through these electrochemical reactions.On practical applications, generally be to make sewage precipitate for some time at settling tank, be introduced into electrochemical reactor then, carry out solid-liquid separation again through after the electrochemical reaction, supernatant detects qualified back water outlet, landfill disposal behind the sludge press filtration.
Summary of the invention
The objective of the invention is to optimize the flow process of electrochemical treatment, a kind of method of electrochemical treatment sewage of more high-efficiency low-carbon is provided.
The applicant discovers that the solids after the electrochemical treatment in the water outlet generally exists with sludge form, wherein contain more ferrite, and ferrite has good effect of removing to heavy metal ion.
Electrochemistry mud mainly results from the electric coagulation process, and anode reacts:
Under acidic conditions:
4Fe
2++O
2+2H
2O→4Fe
3++4OH
-
2H
2O→O
2+4H
++4e
Under alkaline condition:
Fe
2++2OH
-→Fe(OH)
2
Fe
3++3OH
-→Fe(OH)
3
4OH
--4e→O
2+2H
2O
Ferrite is one type of compound MOX, and chemical general formula is M
xFe
3-xO
4, be spinel shape cube crystalline texture, be magnetic, M is other metals in the formula, maybe be for not having yet, x is the natural number of 0-2.The simplest ferrite is Fe
3O
4, form ferritic essential condition and provide enough Fe
2+, Fe
3+When ferrite mixes with treatment sewage, can utilize its adsorptivity and deposition ability, form the co-precipitation effect with heavy metal ion, thereby effectively reduce heavy metal content in the water.
Based on this research; Technical scheme proposed by the invention is such: a kind of method of electrochemical treatment sewage; Sewage passes through solid-liquid separation water outlet behind settling tank, the electrochemical reactor successively, and it is characterized in that: the mud after the solid-liquid separation is back to settling tank, mixes with treatment sewage.
Different sewage and treatment capacity, its sludge output also are different, and the present invention all is back to settling tank with the mud that produces.Find that through test reflux ratio is at 4-5%, mud that promptly refluxes and the ratio that comes water are 1: in the time of between the 25-20, treatment effect is best.
In addition, under the conventional processing condition, ferritic composition, content etc. all are uncontrollable in the mud, and the applicant discovers that the ferritic mechanism that basically forms can be expressed with following formula:
Therefore, like Fe
2+: Fe
3+Mol ratio then can generate ferrite at normal temperatures less than 2, as follows:
Based on this, as the further technical scheme of the present invention, can be through reactor drum aeration time regulation and control Fe
3+With Fe
2+Ratio, be 15-25 minute when the reactor drum water outlet sludge aeration time, Fe
3+With Fe
2+Ratio be 1: 1.5-2.0, this moment, ferritic magnetic, particle diameter, settling property were best, effect of the present invention is also best.
The present invention is back to settling tank with mud, has not only improved treatment effect, and has reduced the new environmental stress that landfill mud is produced, and is to kill two birds with one stone.
Embodiment
Embodiment one
Certain electroplating wastewater processing engineering, it is 100 tons/hour that design comes the water yield, gets into electrochemical reactor in the settling tank deposition after 20 minutes; Getting into reactor drum water copper ion concentration before is 15mg/L, water outlet after electrochemical reaction is handled, and copper ion concentration is 0.3mg/L; Behind the sedimentation and filtration, the aquifer yield of supernatant is 100 tons/hour, and mud (dried mud meter) output is 0.05 ton/hour; After press filtration, get 0.25 ton/hour of filter residue, landfill separately.
Embodiment two
Go up routine engineering through transforming, coming the water yield is 100 tons/hour, and the mud that is back to settling tank is 0.05 ton/hour; In settling tank, stirred 30 minutes postprecipitations 20 minutes, the water copper ion concentration that gets into before the reactor drum is 5mg/L, water outlet after electrochemical reaction is handled; Behind the sedimentation and filtration, the aquifer yield of supernatant is 100 tons/hour, and copper ion concentration is 0.15mg/L; Sludge yield is 0.05 ton/hour, and this sludge aeration after 20 minutes, all is back to settling tank.
Claims (3)
1. the method for an electrochemical treatment sewage, sewage are passed through solid-liquid separation water outlet behind settling tank, the electrochemical reactor successively, and it is characterized in that: the mud after the solid-liquid separation is back to settling tank, mixes with treatment sewage.
2. the method for electrochemical treatment sewage as claimed in claim 1 is characterized in that: reflux ratio is at 4-5%, and mud that promptly refluxes and the ratio that comes water are between 1:25-20.
3. like the method for claim 1 or 2 described electrochemical treatment sewage, it is characterized in that: the reactor drum water outlet sludge aeration time is 15-25 minute, Fe
3+With Fe
2+Ratio be 1:1.5-2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104166996A CN102515399A (en) | 2011-12-14 | 2011-12-14 | Electrochemical treatment method of sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104166996A CN102515399A (en) | 2011-12-14 | 2011-12-14 | Electrochemical treatment method of sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102515399A true CN102515399A (en) | 2012-06-27 |
Family
ID=46286550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104166996A Pending CN102515399A (en) | 2011-12-14 | 2011-12-14 | Electrochemical treatment method of sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102515399A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106281331A (en) * | 2015-05-18 | 2017-01-04 | 南京凯杰环境技术有限公司 | A kind of manufacture method of ferrum system heavy metal-polluted soil immobilization material |
| CN109626674A (en) * | 2019-01-29 | 2019-04-16 | 清华大学 | A kind of novel electric Fenton water treatment facilities of part acidity and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1252108B1 (en) * | 2000-01-28 | 2004-03-31 | Mckay Creek Technologies Ltd. | Water and wastewater treatment process for contaminant removal |
| US20070256972A1 (en) * | 2003-06-19 | 2007-11-08 | Kansai Paint Co., Ltd. | Process for Purification Treatment of Wastewater Containing Organic Substance |
| CN102101733A (en) * | 2011-01-12 | 2011-06-22 | 中国科学院生态环境研究中心 | Method for treating electroplating comprehensive wastewater by scrap iron electrolysis and electrochemical technology |
| CN102153220A (en) * | 2011-02-21 | 2011-08-17 | 中国科学院生态环境研究中心 | Method for treating and recycling polishing waste water of plated part in electroplating industry |
| CN102267759A (en) * | 2011-02-25 | 2011-12-07 | 江苏大学 | Magnetic spherical filling material and preparation method thereof |
-
2011
- 2011-12-14 CN CN2011104166996A patent/CN102515399A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1252108B1 (en) * | 2000-01-28 | 2004-03-31 | Mckay Creek Technologies Ltd. | Water and wastewater treatment process for contaminant removal |
| US20070256972A1 (en) * | 2003-06-19 | 2007-11-08 | Kansai Paint Co., Ltd. | Process for Purification Treatment of Wastewater Containing Organic Substance |
| CN102101733A (en) * | 2011-01-12 | 2011-06-22 | 中国科学院生态环境研究中心 | Method for treating electroplating comprehensive wastewater by scrap iron electrolysis and electrochemical technology |
| CN102153220A (en) * | 2011-02-21 | 2011-08-17 | 中国科学院生态环境研究中心 | Method for treating and recycling polishing waste water of plated part in electroplating industry |
| CN102267759A (en) * | 2011-02-25 | 2011-12-07 | 江苏大学 | Magnetic spherical filling material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106281331A (en) * | 2015-05-18 | 2017-01-04 | 南京凯杰环境技术有限公司 | A kind of manufacture method of ferrum system heavy metal-polluted soil immobilization material |
| CN109626674A (en) * | 2019-01-29 | 2019-04-16 | 清华大学 | A kind of novel electric Fenton water treatment facilities of part acidity and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102730885B (en) | Efficient flocculent precipitate purification method for polymetallic ore benefication wastewater | |
| CN203904113U (en) | Classified treatment equipment for sewage | |
| CN201678544U (en) | Waste water treatment for coal mine with high content of ferrimanganic | |
| CN101618892B (en) | Recovery and comprehensive utilization method of heavy metals in stainless steel pickling wastewater sludge | |
| CN104478160B (en) | Selecting and purchasing ore deposit contains the method for organism and the process of heavy metal wastewater thereby synergistic oxidation | |
| Ye et al. | Treatment of Ni-EDTA containing wastewater by electrocoagulation using iron scraps packed-bed anode | |
| CN102153217B (en) | Electroplating integrated wastewater treatment method | |
| CN104609615B (en) | A treatment method for surface treatment wastewater containing heavy metals | |
| CN102161543A (en) | Advanced treatment method for well drilling wastewater based on compound catalytic oxidation of ozone | |
| CN102775023A (en) | Treatment process of industrial wastewater of gasoline antiknocks | |
| CN101811795A (en) | Processing method and processing system thereof for acidic waste water containing heavy metals | |
| CN103011464A (en) | Treatment method of stibium-containing wastewater | |
| CN106219806A (en) | A kind of processing method of heavy metal wastewater thereby | |
| CN103112918A (en) | Integrated process for treating heavy metal wastewater | |
| CN106745652A (en) | The processing method of arsenic-containing waste water | |
| CN104973668A (en) | Preparation method of organically modified polymeric ferric sulfate water purification agent | |
| CN118047512A (en) | Method for comprehensively utilizing acid mine wastewater | |
| CN102167436B (en) | Electroplating wastewater treating agent | |
| CN103011360A (en) | Treatment method for industrial wastewater generated by copper wet-process smelting | |
| Jo et al. | Recent Advances in Wastewater Electrocoagulation Technologies: Beyond Chemical Coagulation. | |
| CN101665280A (en) | Method for waste water treatment and preparing magnetic flocculant by reclaimed floc | |
| CN102515399A (en) | Electrochemical treatment method of sewage | |
| CN102757141A (en) | Method for processing heavy metal nickel in stainless steel pickling mixed waste acid | |
| CN105621758A (en) | Method for treating heavy metal wastewater by catalytic internal electrolysis coupling ferrite method | |
| CN106698637A (en) | Treatment method of arsenic-containing wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120627 |