CN109179596A - The processing method of electroplating wastewater - Google Patents
The processing method of electroplating wastewater Download PDFInfo
- Publication number
- CN109179596A CN109179596A CN201811146721.8A CN201811146721A CN109179596A CN 109179596 A CN109179596 A CN 109179596A CN 201811146721 A CN201811146721 A CN 201811146721A CN 109179596 A CN109179596 A CN 109179596A
- Authority
- CN
- China
- Prior art keywords
- electroplating wastewater
- processing method
- electrocatalytic oxidation
- wastewater according
- titanium
- 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
Classifications
-
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
-
- 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
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of processing method of electroplating wastewater, include the following steps: to handle electroplating wastewater raw water using electrocatalytic oxidation.The beneficial effects of the present invention are: simple process, is conducive to control operation.
Description
Technical field
The present invention relates to environmental technology fields, and in particular to a kind of processing method of electroplating wastewater.
Background technique
The ingredient of electroplating wastewater is extremely complex, and in addition to containing cyanogen (CN) waste water, heavy metal wastewater thereby and acidic and alkaline waste water, there are also organic
Waste water (COD) is the great waste water classification of harmfulness.With electroplating industry fast development and environmental requirement increasingly raising,
Electroplating Wastewater Treatment has initially entered process for cleanly preparing, overall control stage, and resource recycling and closed cycle will be hairs
The Main way of exhibition.
The processing method majority of electroplating wastewater is chemical precipitation method, electrolysis method etc. at present, handles heavy metal, the COD of water outlet
Deng difficult up to standard.Contain many organic matters in electroplating wastewater, such as organic amine, organic acid, organic phosphorus, raw water COD is in 300-
800mg/L, after conventional materializing strategy, COD generally in 100-300mg/L, if by biochemical treatment, can be into one
Step is reduced between 40-150mg/L.Because the biodegradability of electroplating wastewater is poor, conventional biochemical process is difficult to be electroplated useless
Water COD is handled to 50mg/L or less.It, can be higher in temperature by being optimized to biochemical process even if parcel plating waste water
When (room temperature>10 DEG C) reach ideal treatment effect (water outlet COD<50mg/L), also can cause to locate under the influence of many factors
Effect is managed to be deteriorated.
It is hydroxyl free that Fenton oxidation, which is that (pH=2~4) are catalyzed decomposing hydrogen dioxide solution using ferrous ion in acid condition,
Base carries out oxygenolysis to various organic matters using hydroxyl radical free radical, waste water is then adjusted to alkaline (pH > 9), coagulation is added
Agent flocculant is separated by solid-liquid separation.
Iron-carbon micro-electrolysis is also the potential difference generated using the micro cell that iron and carbon form, to organic in acid condition
Object carries out oxygenolysis, is then adjusted to alkalinity and is separated by solid-liquid separation.
Fenton oxidation and iron-carbon micro-electrolysis can generate a large amount of sludge during oxygenolysis organic matter.And it is electroplated
Sludge belongs to hazardous waste, will lead to integrated treatment cost and is substantially increased.
On the other hand, it is required to repeatedly adjust soda acid in Fenton oxidation technique, so complex process, needs staff to hold
Continuous operation, cost of labor are very high.
In addition, traditional electricity " catalysis oxidation " technology has a variety of defects: first is using plate electrode, required electricity
Current density is high, and energy consumption is too high；Second is using iron plate as electrode, and the removal to organic matter is also only by absorption, to organic matter
Oxidability it is poor；Third is by increasing catalyst filling between anode and cathode or anode being made into three-dimensional structure, to mention
High catalytic activity, but the manufacturing cost of this structure is high, and electrode surface is easy contaminated object attachment blocking, and catalysis is caused to be lived
Property failure.
Summary of the invention
The purpose of the present invention is to provide a kind of processing method of electroplating wastewater, simple processes.
To achieve the above object, the technical scheme is that
A kind of processing method of electroplating wastewater includes the following steps: to handle electroplating wastewater raw water using electrocatalytic oxidation.
Preferably, include the following steps: that pH is adjusted before electrocatalytic oxidation, electroplating wastewater raw water pH is adjusted to acid
Property.
Preferably, when electrocatalytic oxidation, anode electrophilic from water, cathode gives oxygen molecule supplied for electronic, and water, oxygen molecule are urged
Hydroxyl radical free radical, ozone are turned to, and then the organic matter in electroplating wastewater of degrading.
Preferably, anode is titanium-based ruthenium iridium electrode, and cathode is carbon felt or graphite electrode.
Preferably, titanium-based ruthenium iridium electrode is using titanium as substrate, and substrate surface is coated with the mixed of ru oxide and iridium oxide
Close object.
Preferably, when electrocatalytic oxidation, current density is 150~300A/m2, supply current is direct current.
Preferably, when electrocatalytic oxidation, air is blasted into electroplating wastewater raw water, is stirred electroplating wastewater, is kept liquid uniform
Mixing reduces concentration polarization, while oxygen molecule being made to be reduced into hydrogen peroxide in cathode surface.
Preferably, electrocatalytic oxidation carries out at normal temperature.
The operation principle of the present invention is that:
When electrocatalytic oxidation,
Anode:
H2O→·OH+H++e
Org+·OH→product
2·OH→H2O+1/2O2
3H2O→O3(g)+6e+6H+
O2+H2O→O3(aq)+2e+2H+
Cathode:
It is adsorbed on the O of catalyst surface2By capturing electronics, peroxy example O is formed2, then pass through a system in the solution
Column reaction generates H2O2:
O2+e→O2 -
Or O2+H+→HO2
2HO2→H2O2+O2
O2 -+HO2·→O2+HO2 -
HO2 -+H+→H2O2
H2O2-e→HO·+OH-
Different from Fenton process and Fe-C Micro Electrolysis Method, Electrocatalytic Oxidation does not generate solid waste in use.
Anode used in the present invention is titanium-based ruthenium iridium electrode, i.e., using titanium as substrate, surface coats ru oxide and iridium oxygen
The mixture of change selects the anode to be because the salt content of electroplating wastewater is higher, and especially chloride ion content is also high, and the electricity
Pole is best analysis chloride electrode, chloride ion can be converted to Active Chlorine, to improve oxidation efficiency.In addition, the anode uses
Service life is long, and oxygen evolution potential is high, compares other electrodes, and the oxygen that anode generates will lack, and electric current service efficiency is high.
Current density of the invention is 150~300A/m2.Current density is excessively high to have apparent side effect.When electric current is high,
It can be directly oxygen by hydrogen peroxide oxidation, react as follows:
Anode: H2O2+2e→2H-+O2
The reaction will substantially reduce the utilization rate of hydrogen peroxide.Current density is too small, and the electrocatalytic reaction time will increase, and is unfavorable for
Industrial applications.
Power supply of the invention is DC power supply.
Reaction of the invention generally carries out at normal temperature.Temperature increases, and reaction can accelerate, but temperature is more than 60 DEG C, will be right
The service life of anode adversely affects.So generally carrying out at normal temperature.
Compared with prior art, the beneficial effects of the present invention are:
1) improve the oxidability to organic matter, enhance COD(especially complexing agent) removal rate, improve B/C ratio.
2) in addition do not increase sludge quantity.Other medicaments are not added in catalytic process, therefore will not additionally generate sludge.
3) simple process is conducive to control operation.
4) operating cost is low.The salinity of electroplating wastewater is high, therefore its conductivity is very high, using at electrocatalytic oxidation
When reason, charge utilization efficiency is higher, and cost is lower.
Specific embodiment
With reference to embodiment, the specific embodiment of the present invention is further described.Following embodiment is only used for more
Add and clearly demonstrate technical solution of the present invention, and not intended to limit the protection scope of the present invention.
The technical solution that the present invention embodies is:
A kind of processing method of electroplating wastewater includes the following steps: to handle electroplating wastewater raw water using electrocatalytic oxidation.
Include the following steps: that pH is adjusted before electrocatalytic oxidation, electroplating wastewater raw water pH is adjusted to acid.
When electrocatalytic oxidation, anode electrophilic from water, cathode gives oxygen molecule supplied for electronic, is hydroxyl by water, oxygen muonic catalysis
Base free radical, ozone, and then the organic matter in electroplating wastewater of degrading.
Anode is titanium-based ruthenium iridium electrode, and cathode is carbon felt or graphite electrode.
For titanium-based ruthenium iridium electrode using titanium as substrate, substrate surface is coated with the mixture of ru oxide and iridium oxide.
When electrocatalytic oxidation, current density is 150~300A/m2, supply current is direct current.
When electrocatalytic oxidation, air is blasted into electroplating wastewater raw water, stirs electroplating wastewater, liquid is made uniformly to mix, drop
Low concentration polarization, while oxygen molecule being made to be reduced into hydrogen peroxide in cathode surface.
Electrocatalytic oxidation carries out at normal temperature.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of processing method of electroplating wastewater, which comprises the steps of:
Electroplating wastewater raw water is handled using electrocatalytic oxidation.
2. the processing method of electroplating wastewater according to claim 1, which is characterized in that including such as before electrocatalytic oxidation
Lower step:
PH is adjusted, and electroplating wastewater raw water pH is adjusted to acid.
3. the processing method of electroplating wastewater according to claim 2, which is characterized in that
When electrocatalytic oxidation, anode electrophilic from water, cathode gives oxygen molecule supplied for electronic, certainly for hydroxyl by water, oxygen muonic catalysis
By base, ozone, and then the organic matter in electroplating wastewater of degrading.
4. the processing method of electroplating wastewater according to claim 3, which is characterized in that
Anode is titanium-based ruthenium iridium electrode, and cathode is carbon felt or graphite electrode.
5. the processing method of electroplating wastewater according to claim 4, which is characterized in that
For titanium-based ruthenium iridium electrode using titanium as substrate, substrate surface is coated with the mixture of ru oxide and iridium oxide.
6. the processing method of electroplating wastewater according to claim 5, which is characterized in that
When electrocatalytic oxidation, current density is 150~300A/m2, supply current is direct current.
7. the processing method of electroplating wastewater according to claim 6, which is characterized in that
When electrocatalytic oxidation, blast air into electroplating wastewater raw water, stir electroplating wastewater, mix liquid uniformly, reduce it is dense
Difference polarization, while oxygen molecule being made to be reduced into hydrogen peroxide in cathode surface.
8. the processing method of electroplating wastewater according to claim 7, which is characterized in that
Electrocatalytic oxidation carries out at normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146721.8A CN109179596A (en) | 2018-09-29 | 2018-09-29 | The processing method of electroplating wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146721.8A CN109179596A (en) | 2018-09-29 | 2018-09-29 | The processing method of electroplating wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109179596A true CN109179596A (en) | 2019-01-11 |
Family
ID=64907685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811146721.8A Pending CN109179596A (en) | 2018-09-29 | 2018-09-29 | The processing method of electroplating wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109179596A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109824124A (en) * | 2019-03-29 | 2019-05-31 | 江苏京源环保股份有限公司 | A kind of electroplating wastewater processing electrocatalysis oxidation apparatus |
| CN109825852A (en) * | 2019-03-11 | 2019-05-31 | 深圳市穆尔科技有限公司 | Pesticide removes electrode used therein and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104341063A (en) * | 2013-07-29 | 2015-02-11 | 黄明科 | Efficient treatment technology for electroplating sewage |
| CN105084648A (en) * | 2015-07-21 | 2015-11-25 | 昆山美淼环保科技有限公司 | Treatment method for hardly biodegraded sewage |
| CN105731604A (en) * | 2016-03-30 | 2016-07-06 | 苏州湛清环保科技有限公司 | Advanced treatment method for electroplating wastewater |
-
2018
- 2018-09-29 CN CN201811146721.8A patent/CN109179596A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104341063A (en) * | 2013-07-29 | 2015-02-11 | 黄明科 | Efficient treatment technology for electroplating sewage |
| CN105084648A (en) * | 2015-07-21 | 2015-11-25 | 昆山美淼环保科技有限公司 | Treatment method for hardly biodegraded sewage |
| CN105731604A (en) * | 2016-03-30 | 2016-07-06 | 苏州湛清环保科技有限公司 | Advanced treatment method for electroplating wastewater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825852A (en) * | 2019-03-11 | 2019-05-31 | 深圳市穆尔科技有限公司 | Pesticide removes electrode used therein and preparation method thereof |
| CN109824124A (en) * | 2019-03-29 | 2019-05-31 | 江苏京源环保股份有限公司 | A kind of electroplating wastewater processing electrocatalysis oxidation apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bian et al. | Electrochemical removal of amoxicillin using a Cu doped PbO2 electrode: electrode characterization, operational parameters optimization and degradation mechanism | |
| Li et al. | Evaluation of the technoeconomic feasibility of electrochemical hydrogen peroxide production for decentralized water treatment | |
| CN101838074B (en) | Method for degrading nitrobenzene waste water by polyphase electrocatalytic oxidation-Fenton coupling process and reactor thereof | |
| Guan et al. | Electrooxidation of nickel-ammonia complexes and simultaneous electrodeposition recovery of nickel from practical nickel-electroplating rinse wastewater | |
| CN101734779B (en) | Method for preparing Fenton reagent on site for treating waste water | |
| CN102976451A (en) | Wastewater treatment device and method for in-situ electric generation of H2O2 cooperating with O3 oxidation | |
| CN105084648A (en) | Treatment method for hardly biodegraded sewage | |
| CN201358182Y (en) | Device for carrying out water treatment to field-generated Fenton reagents | |
| CN103693788A (en) | Industrial sewage treatment method and integrated apparatus for same | |
| CN105731604A (en) | Advanced treatment method for electroplating wastewater | |
| CN106379964B (en) | A kind of electro-catalysis-catalytic oxidizing equipment and wastewater treatment method for wastewater from chemical industry advanced treating | |
| CN108585130A (en) | The electric Fenton oxidation processing method of acidity waste water containing DMF | |
| Huang et al. | An electrochemical process intensified by bipolar iron particles for nitrate removal from synthetic groundwater | |
| CN109179596A (en) | The processing method of electroplating wastewater | |
| CN106145483B (en) | Multiple oxidation treatment method and device for wastewater | |
| CN207958009U (en) | A kind of system for handling industrial wastewater with high salt | |
| CN102942243A (en) | Wastewater treatment method combining three-dimensional electrode and electric Fenton | |
| CN112723494B (en) | Water treatment technology for promoting synchronous removal of refractory organic matters and nitrogen elements by electro-activated persulfate | |
| CN104140142A (en) | Coupling treatment method for fracturing flow-back fluid | |
| CN204022601U (en) | The micro-electrolysis advanced oxidation of MEO reactor | |
| CN105198049A (en) | Method of sewage treatment | |
| CN102701336A (en) | Power-saving method for electrolysis treatment of wastewater | |
| JP2003145161A (en) | Water treatment apparatus and water treatment method | |
| CN203728621U (en) | Iron-carbon internal electrolysis and external electrolysis combined wastewater treatment device | |
| CN102718290A (en) | Electricity-saving method for electrolysis waste water treatment according to catalytic oxidation |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |