CN107140785A - The processing method of the high COD chemical production wastewaters of high chloride ion - Google Patents
The processing method of the high COD chemical production wastewaters of high chloride ion Download PDFInfo
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- CN107140785A CN107140785A CN201710297320.1A CN201710297320A CN107140785A CN 107140785 A CN107140785 A CN 107140785A CN 201710297320 A CN201710297320 A CN 201710297320A CN 107140785 A CN107140785 A CN 107140785A
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- 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
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- 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
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
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- 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
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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)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention relates to a kind of processing method of the high COD chemical production wastewaters of high chloride ion.Its purpose is to provide the processing method of a kind of COD that can effectively remove in waste water, the chemical production wastewater of salinity (chlorion).The processing method of the high COD chemical production wastewaters of high chloride ion of the present invention, comprises the following steps：Filtering；Electrocatalytic oxidation；Evaporation is saltoutd；Biochemical treatment.The techniques such as processing method combined filtering, neutralization, electrocatalytic oxidation, evaporation and the biochemical treatment of the high COD chemical production wastewaters of high chloride ion of the present invention, the COD and salinity contained in waste water is removed successively, final outflow water COD contents are not higher than 500mg/L, salt content is not higher than 5000mg/L, COD clearance is more than 95% in processing procedure, and the clearance of salinity is more than 95%.The present invention is used for sewage treatment area.
Description
Technical field
The present invention relates to a kind of sewage water treatment method of at least one physical treatment step, more particularly to one kind is used for
The sewage water treatment method of the high COD chemical production wastewaters of high chloride ion.
Background technology
The COD of the high COD chemical production wastewaters of high chloride ion often in more than 50000mg/L, salinity is more up to 10%~
20%, wherein 30000~60000mg/L of chlorine ion concentration, belong to typical high COD, high-salt wastewater.Usual enterprise uses Fenton
The method for diluting or evaporating after oxidation is pre-processed, and pretreatment water outlet enters anaerobic and aerobic reaction tank and carries out biochemical treatment,
The drawbacks of this method, mainly has：(1) need to consume a large amount of hydrogen peroxide (1~5%)；(2) Fenton oxidation reaction produces a large amount of iron cements；
(3) dilution causes biochemical treatment water to be significantly increased.Therefore, a kind of effective COD removed in waste water, salinity (chlorion) are developed
Processing method be particularly important.Invent CN201210437792 and use Fenton oxidation, micro-filtrate membrane filtration and membrane distillation group
Technique is closed to handle the waste water that pH is 7~10, electrical conductivity 10000~50000 μ S/cm, COD500~1500mg/L or so.
It is of the invention compared with the advantage for inventing CN201210437792 institutes inventive method to be that the higher waste water of COD concentration, salinity is handled,
And iron cement will not be produced.Invention CN201110166215 discloses a kind of processing system of high salinity pharmaceutical wastewater, is specially " to urge
Change light electrolysis+hydrogen peroxide catalytic oxidation+photosynthetic bacteria anaerobic system+photosynthetic bacteria aerobic system+coagulation decoloration pond " handling process, but
It is that the system is less than 60000mg/L to handled waste water requirement COD concentration, total salinity is less than 5%, and to chlorion without removal
Effect.The present invention can be aoxidized using chlorion in electrocatalytic reaction in the Active Chlorine that anode is produced to organic matter, phase
There is the clear superiority for not producing mud for light electrolysis and Fenton oxidation processing.Invention discloses a kind of electro-catalysis in CN105217743A
The method of oxidation processes methanol and formaldehyde industrial wastewater, electricity is carried out using the active oxide coatings electrode with electro-catalysis function
Industrial wastewater of the catalytic oxidation treatment containing methanol and formaldehyde, COD is down to below 300mg/L from 200~300mg/L.And it is of the invention
In the production waste water that electrocatalytic oxidation is placed on to the high COD of high chloride ion, chlorion is made full use of to the favourable effect of electrocatalytic reaction
Fruit is removed to the COD for being up to 60000mg/L.
The side that " chemical oxidation+desalination " and biochemical treatment are combined is used generally for high chloride ion high-COD waste water
Method.
The combination of chemical oxidation and evaporation will often consider sequencing, and first evaporation can be influenceed and make by high organic matter
Into evaporation equipment coking and blocking, and first chemical oxidation needs to adjust pH repeatedly and production mud (such as Fenton's reaction) increase energy consumption and
Oxidation is not thorough (ozone).Degraded of the pretreatment to hardly degraded organic substance and the removal effect to salinity do not reach requirement and can caused
Microbial activity, which is received, substantially to be suppressed to have a strong impact on subsequent biochemical treatment effect.
The content of the invention
The present invention is in order to solve the above technical problems, and there is provided a kind of COD, salinity that can effectively remove in waste water
The processing method of the chemical production wastewater of (chlorion).
The activity of microorganism will be suppressed when chlorion is more than 2000mg/L, and COD clearance is decreased obviously, therefore is removed
Salt is necessary technique, and too high chlorion is often considered as unfavorable factor.But for electrocatalytic oxidation technique, electrochemistry
React the Cl produced2、ClO-COD can be removed as oxidant the efficient oxidation, therefore electrocatalytic oxidation technique is placed in steaming by the present invention
Before hair analysis salt, Coal Gas Washing Cycling Water chlorion can be made full use of, COD, one action two are removed while reduction chlorine ion concentration
.Electrocatalytic oxidation processing simultaneously is easily influenceed by suspended impurity and oil substances, therefore is considered before electrocatalytic oxidation
Increase filtering technique, treatment effect influences of the pH on electrocatalytic oxidation is also very big, it is necessary to find Cl2、ClO-Oxidation effectiveness is preferable
PH value (alkalescent), and electrocatalytic oxidation water outlet is in alkalescent and also has and will not corrode evaporation equipment.By " chemical oxidation+remove
The wastewater biochemical treatment effect of salt " can just access more preferable raising.
The present invention relates to a kind of processing method of the high COD chemical production wastewaters of high chloride ion, methods described includes following step
Suddenly：
(1) filter：Filtering removes the grease of wastewater surface floating；
(2) electrocatalytic oxidation：To by step (1) processing waste water carry out electrocatalytic oxidation processing, make full use of chlorine from
The Cl that son is produced2、ClO-To decompose larger molecular organicses, the biodegradability of waste water is improved；
(3) evaporation is saltoutd：Salinity total amount in evaporation of saltouing, reduction water is carried out to the waste water by step (2) processing；
(4) biochemical treatment：The waste water handled by step (3) is carried out by anaerobic reactor and aerobic reactor technique
Biochemical degradation processing, that is, complete the processing of the high COD chemical production wastewaters of high chloride ion of the present invention.
Preferably, the filtering in the step (1) is using sand filtration filtering, activated carbon filtering, accurate filter filtering or fine
Tie up the filtering of ball filter.
Preferably, water outlet pH value is adjusted to entering electrocatalysis oxidation reaction after 9~11 after the filtering described in the step (1)
Device.
Preferably, the electrode that electric catalysis reactor is used in the step (2) be graphite, stainless steel, Pt/C, Pt/Ti or
RuO2/ Ti electrodes.
Preferably, electric catalysis reactor kinetic current density is 10mA/cm in the step (2)2~40mA/cm2。
Preferably, the evaporation in the step (3) uses MVR evaporators or multi-effect evaporator.
Preferably, the anaerobic reactor in step (4) uses IC reactors, 24~96h of hydraulic detention time.
Preferably, the anaerobic reactor in the step (4) uses IC reactors.
Preferably, the aerobic process in the step (4) is carried out using aerobic fluidized bed reactor.
The processing method of the high COD chemical production wastewaters of high chloride ion of the present invention compared with prior art, with following beneficial
Effect：
(1) the processing method combined filtering of the high COD chemical production wastewaters of high chloride ion of the present invention, neutralization, electrocatalytic oxidation,
The technique such as evaporation and biochemical treatment, removes the COD and salinity contained in waste water successively, and final outflow water COD contents are not higher than
500mg/L, salt content is not higher than the clearance of COD in 5000mg/L, processing procedure more than 95%, and the clearance of salinity exists
More than 95%.
(2) present invention removes the grease that wastewater surface is floated by filtering, and pH is adjusted after filtering to appropriate value, into electricity
Catalyst oxidation reactor is handled, and by electrocatalytic oxidation effect degraded larger molecular organicses, improves wastewater biodegradability；It
Most of salinity in electro-catalysis water outlet is removed by evaporator afterwards, the normal operation for subsequent biochemical processing provides good condition.
Water outlet is after anaerobic and aerobic are handled after evaporation, and COD is further reduced, and can reach what industrial park sewage plant was focused on
Adapter standard.
Embodiment
Pass through the processing method of following examples and checking test to the high COD chemical production wastewaters of high chloride ion of the present invention
It is further described.
Embodiment 1
The processing method of the high COD chemical production wastewaters of certain high chloride ion of the present embodiment is carried out according to the following steps：
(1) filter：The grease that wastewater surface is floated is removed by filtering；
(2) electrocatalytic oxidation：Electrocatalytic oxidation processing is carried out to step (1) water outlet, larger molecular organicses are decomposed, raising can
Biochemical；
(3) evaporation is saltoutd：Salinity in evaporation of saltouing, reduction water is carried out to water outlet obtained by step (2)；
(4) Anaerobic Treatment：Biochemical drop is carried out to water outlet obtained by step (3) as anaerobic reactor and aerobic reactor technique
Solution processing.
The electrocatalysis oxidation reaction device electrode used in the present embodiment is Pt/Ti anodes, and graphite is used as negative electrode, kinetic current
Density is 30mA/cm2, reaction time 4h；Anaerobic reactor uses IC reactor pilot-plants, residence time 72h, aerobic reaction
Device uses aerobic fluidized bed pilot-plant, residence time 48h.
The present embodiment method of wastewater treatment is as shown in table 1 to the treatment effect of the chemical production wastewater：
The treatment effect of table 1
As seen from the above table, the present embodiment method has higher clearance to the COD and salinity in the chemical production wastewater,
Clearance is up to more than 95%.
Embodiment 2
The processing method of the high COD chemical production wastewaters of certain high chloride ion of the present embodiment is carried out according to the following steps：
(1) pH value of waste water is adjusted to 10；
(2) electrocatalytic oxidation：Electrocatalytic oxidation processing is carried out to step (1) water outlet, larger molecular organicses are decomposed, raising can
Biochemical；
(3) evaporation is saltoutd：Salinity in evaporation of saltouing, reduction water is carried out to water outlet obtained by step (2)；
(4) Anaerobic Treatment：Biochemical drop is carried out to water outlet obtained by step (3) as anaerobic reactor and aerobic reactor technique
Solution processing.
The electrocatalysis oxidation reaction device electrode used in the present embodiment is Pt/C anodes, and stainless steel is used as negative electrode, reaction electricity
Current density is 20mA/cm2, reaction time 4h；Anaerobic reactor uses IC reactor pilot-plants, residence time 48h, aerobic anti-
Device is answered to use aerobic fluidized bed pilot-plant, residence time 24h.
The present embodiment method of wastewater treatment is as shown in table 2 to the treatment effect of the chemical production wastewater：
The treatment effect of table 2
As seen from the above table, the present embodiment method has higher clearance to the COD and salinity in the chemical production wastewater,
Clearance is up to more than 95%.
Embodiment 3
The processing method of the high COD chemical production wastewaters of certain high chloride ion of the present embodiment is carried out according to the following steps：
(1) wastewater pH is adjusted to 5；
(2) electrocatalytic oxidation：Electrocatalytic oxidation processing is carried out to step (1) water outlet, larger molecular organicses are decomposed, raising can
Biochemical；
(3) evaporation is saltoutd：Salinity in evaporation of saltouing, reduction water is carried out to water outlet obtained by step (2)；
(4) Anaerobic Treatment：Biochemical drop is carried out to water outlet obtained by step (3) as anaerobic reactor and aerobic reactor technique
Solution processing.
The electrocatalysis oxidation reaction device electrode used in the present embodiment is RuO2/ Ti anodes, graphite is used as negative electrode, reaction electricity
Current density is 40mA/cm2, reaction time 4h；Anaerobic reactor uses IC reactor pilot-plants, residence time 72h, aerobic anti-
Device is answered to use aerobic fluidized bed pilot-plant, residence time 36h.
The present embodiment method of wastewater treatment is as shown in table 3 to the treatment effect of the chemical production wastewater：
The treatment effect of table 3
As seen from the above table, the present embodiment method has higher clearance to the COD and salinity in the chemical production wastewater,
Clearance is up to more than 95%.
Although the foregoing describing the embodiment of the present invention, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
On the premise of principle and essence from the present invention, various changes or modifications can be made to these embodiments, but these are changed
Protection scope of the present invention is each fallen within modification.
Claims (8)
1. a kind of processing method of the high COD chemical production wastewaters of high chloride ion, it is characterised in that：Methods described includes following step
Suddenly：
(1) filter：Filtering removes the grease of wastewater surface floating；
(2) electrocatalytic oxidation：Electrocatalytic oxidation processing is carried out to the waste water by step (1) processing, produced using chlorion
Cl2、ClO-To decompose larger molecular organicses, the biodegradability of waste water is improved；
(3) evaporation is saltoutd：Evaporation of saltouing is carried out to the waste water by step (2) processing；
(4) biochemical treatment：The waste water handled by step (3) is carried out by anaerobic reactor and aerobic reactor technique biochemical
Degradation treatment, that is, complete the processing of the high COD chemical production wastewaters of high chloride ion of the present invention.
2. the processing method of the high COD chemical production wastewaters of high chloride ion according to claim 1, it is characterised in that：It is described
Filtering in step (1) is using sand filtration filtering, activated carbon filtering, accurate filter filtering or fiber ball filter filtering.
3. the processing method of the high COD chemical production wastewaters of high chloride ion according to claim 2, it is characterised in that：It is described
Water outlet pH value is adjusted to entering electrocatalysis oxidation reaction device after 9~11 after filtering described in step (1).
4. the processing method of the high COD chemical production wastewaters of high chloride ion according to claim 3, it is characterised in that：It is described
The electrode that electric catalysis reactor is used in step (2) is graphite, stainless steel, Pt/C, Pt/Ti or RuO2/ Ti electrodes.
5. the processing method of the high COD chemical production wastewaters of high chloride ion according to claim 4, it is characterised in that：It is described
Electric catalysis reactor kinetic current density is 10mA/cm in step (2)2~40mA/cm2。
6. the processing method of the high COD chemical production wastewaters of high chloride ion according to claim 5, it is characterised in that：It is described
Evaporation in step (3) uses MVR evaporators or multi-effect evaporator.
7. the processing method of the high COD chemical production wastewaters of high chloride ion according to claim 6, it is characterised in that：It is described
Anaerobic reactor in step (4) uses IC reactors.
8. the processing method of the high COD chemical production wastewaters of high chloride ion according to claim 7, it is characterised in that：It is described
Aerobic process in step (4) is carried out using aerobic fluidized bed reactor.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108059292A (en) * | 2017-11-28 | 2018-05-22 | 南京环保产业创新中心有限公司 | Lithium ion battery produces the processing method of wastewater zero discharge |
| CN109574386A (en) * | 2018-12-11 | 2019-04-05 | 安徽三江水务工程有限公司 | A kind for the treatment of of Perfume Wastewater processing system |
| CN110540345A (en) * | 2019-09-20 | 2019-12-06 | 段智坤 | Gelatin wastewater treatment process |
| CN113213587A (en) * | 2020-04-26 | 2021-08-06 | 南京理工大学 | Device and method for treating formaldehyde-containing wastewater |
| CN117023854A (en) * | 2023-08-03 | 2023-11-10 | 广东威特雅环境科技有限公司 | Be used for DMM n Degradation method and equipment for pollutant in production wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108059292A (en) * | 2017-11-28 | 2018-05-22 | 南京环保产业创新中心有限公司 | Lithium ion battery produces the processing method of wastewater zero discharge |
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| CN110540345A (en) * | 2019-09-20 | 2019-12-06 | 段智坤 | Gelatin wastewater treatment process |
| CN113213587A (en) * | 2020-04-26 | 2021-08-06 | 南京理工大学 | Device and method for treating formaldehyde-containing wastewater |
| CN117023854A (en) * | 2023-08-03 | 2023-11-10 | 广东威特雅环境科技有限公司 | Be used for DMM n Degradation method and equipment for pollutant in production wastewater |
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Application publication date: 20170908 |