CN107162126A - COD removal efficiency, the method for biochemical in a kind of raising organic wastewater - Google Patents
COD removal efficiency, the method for biochemical in a kind of raising organic wastewater Download PDFInfo
- Publication number
- CN107162126A CN107162126A CN201710480393.4A CN201710480393A CN107162126A CN 107162126 A CN107162126 A CN 107162126A CN 201710480393 A CN201710480393 A CN 201710480393A CN 107162126 A CN107162126 A CN 107162126A
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- Prior art keywords
- organic wastewater
- cod
- iron
- carbon
- biochemical
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Classifications
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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
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses COD removal efficiency, the method for biochemical in a kind of raising organic wastewater, methods described comprises the following steps：(1) organic wastewater is passed through in the packed tower equipped with iron carbon filler, controls pH to maintain 34, the 6h of aerated reaction 2 by pH on-line computing models, then solution is adjusted into pH to 8, the filtrate handled by packed tower is made in further flocculating setting, blowing；(2) sodium chloride, MnO are added in filtrate made from step (1), in the case where pH is 8, electrocatalysis oxidation reaction is carried out, so as to remove the pollutant in organic wastewater.The inventive method can repeatedly be aoxidized to organic wastewater, and improve process conditions, improve efficiency, be compensate for the limitation of single method, improved disposal ability.
Description
Technical field
The present invention relates to the processing technology field of organic wastewater, the micro- electricity of iron carbon filler progress is utilized more particularly, to a kind of
COD method in solution-electrocatalytic oxidation, processing waste water.
Background technology
Organic wastewater generally refers to the draining discharged by industries such as papermaking, leather and food.Organic wastewater is with organic dirt
The waste water based on thing is contaminated, organic wastewater easily causes Water Eutrophication, and hazard ratio is larger, if directly discharged, can cause serious
Pollution.Organic pollution contained in easily biological-degradable organic wastewater is not complicated, with aromatic compound and heterocyclic compound
Thing is in the majority, more than contain sulfide, nitride, toxic organic compound.Wastewater biochemical is poor, and toxic to microorganism, it is difficult to use
General biochemical method processing.Common technique has absorption method, extraction, concentration method, burning method, fenton oxidizing process, ozone
Oxidizing process etc., but have its not enough and limitation, therefore the method explored efficiently, economic handles high COD organic wastewater and difficult degradation
Organic wastewater turns into the research topic when previous big hot topic.
Iron-carbon micro-electrolysis is based on the galvanic interaction in electrochemistry.When iron and carbon-impregnated enter in electrolyte solution, due to
There is 1.2V difference in Electrode Potential between Fe and C, thus countless galvanic cells can be formed, an electric field is constituted in its action space
Electrolysis processing is carried out to waste water, to reach the purpose of degradable organic pollutant.
The difficult biochemical organic wastewaters of the high COD of electrochemicial oxidation be pollutant occurs on electrode Direct Electrochemistry react or
The strong oxidizing property active material produced using electrode surface makes pollutant occur redox transformation, is made by anodic oxidation organic
Pollutant and part inorganic pollution are converted into innocuous substance.Electrochemical oxidation can effectively handle the organic of the difficult biochemistry of high COD
Waste water, and it is good with other technical compatibilities, synergy.
Current iron-carbon micro-electrolysis, advanced electrochemical oxidation process have obtained universal application in terms of wastewater treatment, but respectively
From there are some shortcomings, there is certain limitation, such as COD clearances are low, the low problem of electrocatalytic oxidation efficiency, limit waste water
The practical application of processing.The characteristics of for high COD hardly possiblies biochemical waste water, iron-carbon micro-electrolysis and electrocatalytic oxidation are combined,
Learn from other's strong points to offset one's weaknesses, can efficiently handle the difficult biochemical organic wastewaters of high COD.
The content of the invention
In view of the above-mentioned problems existing in the prior art, COD in organic wastewater is improved the applicant provides one kind to go
Except efficiency, the method for biochemical.The inventive method can repeatedly be aoxidized to organic wastewater, and improve process conditions, be carried
High efficiency, compensate for the limitation of single method, improves disposal ability.
Technical scheme is as follows：
COD removal efficiency, the method for biochemical in a kind of raising organic wastewater, methods described comprise the following steps：
(1) organic wastewater is passed through in the packed tower equipped with iron carbon filler, controls pH to maintain by pH on-line computing models
3-4, aerated reaction 2-6h, then solution is adjusted into pH to 8, the filter handled by packed tower is made in further flocculating setting, blowing
Liquid；
(2) sodium chloride, MnO are added in filtrate made from step (1), in the case where pH is 8, electrocatalysis oxidation reaction is carried out,
So as to remove the pollutant in organic wastewater.
COD contents are 10000-70000mg/L in organic wastewater described in step (1), and BOD/COD is less than 0.05.
Iron carbon filler described in step (1) is that carbon is made with iron through oversintering, and wherein the volume ratio of iron and carbon is 8:1~3.
The particle diameter of iron carbon particle is 2~6mm in iron carbon filler described in step (1).
Sodium chloride addition described in step (2) is 15kg/t；The addition of the MnO is 8-30kg/t.
The condition of electrocatalytic oxidation is described in step (2)：Anode is that titanium plates iridium ruthenium, and negative electrode is stainless steel, current density
For 2A/dm2, electrolysis time is 20h, and temperature is room temperature.
The present invention is beneficial to be had technical effect that：
1st, the inventive method first passes through iron-carbon micro-electrolysis to organic waste using iron-carbon micro-electrolysis-electrocatalytic oxidation combination method
Water carries out primary oxidation, then carries out electrocatalytic oxidation under chlorion and MnO co-catalysis oxidation, and two are carried out to waste water
Secondary oxidation, makes the organic pollution in waste water decompose substantially, reaches reduction COD, improves the purpose of biochemical.
2nd, the inventive method uses iron-carbon micro-electrolysis-electrolysis Electrocatalytic Oxidation, at the difficult biochemical organic wastewaters of high COD
Reason effect is good, and non-secondary pollution, COD clearances are up to more than 85%, BOD/COD from 0.05 to be issued to more than 0.35, make to have
The biochemical of machine waste water is greatly improved.
3rd, the inventive method is using two kinds of oxidizing process combinations, and wherein iron-carbon micro-electrolysis is the difference in Electrode Potential by Fe-C,
Countless galvanic cells are formed, the organic matter in substantial amounts of hydroxyl radical free radical, oxidized waste water is produced, organic matter occurred fracture, opened
Ring；During electrocatalytic oxidation, under the co-catalysis oxidation of the strong metal oxide of catalytic performance and chlorion, produce
The hydroxyl radical free radical of Strong oxdiative ability or active free radical, occur electrochemical action with the organic matter in waste water, so that this
Organic matter degradation in class waste water.
4th, the present invention is compared with single method drop COD technologies, and advantage is mainly reflected in：(1) used in iron-carbon micro-electrolysis
The Fe-C ratios of iron carbon filler can farthest produce the organic matter in hydroxyl radical free radical, efficient oxidized waste water, and select
Particle it is smaller, specific surface area is big, can fully be contacted with waste water, improves oxidation efficiency；(2) waste water after iron-carbon micro-electrolysis processing
Adjust after pH, ferric hydroxide precipitate can be produced, play a part of the pH symbols of the organic matter and solution in flocculating setting, absorption waste water
Close the condition of electrocatalytic oxidation；(3) oxidant and catalyst added during electrocatalytic oxidation, price is low, and can significantly carry
High treatment efficiency, can effectively reduce energy consumption, cost-effective；(4) combination of this two methods must be connected according to this order
Connect, handled with specificity, and by the combination of this scheme, efficiency is apparently higher than any single mode；(5) whole reaction
Carried out under normal temperature, condition of normal pressure, energy-conserving and environment-protective.
Embodiment
With reference to embodiment, the present invention is specifically described.
Embodiment 1
It is 15200mg/L by the initial COD of 1L, the waste water that BOD/COD is less than 0.05 is first passed through in iron-carbon micro-electrolysis filler tower
(filler is iron and carbon according to 8:2.6 volume ratio sintering is formed, and particle diameter is 6mm), adjust and tieed up in pH to 3, aeration, processing procedure
PH is held in 3-4, after being disposed；PH to 8 is adjusted, after press filtration, filtrate is taken, adds sodium chloride, dosage is 15kg/t, then is added
MnO, dosage is 10kg/t, iridium ruthenium plate is plated as anode using titanium, using stainless steel plate as negative electrode, using current density as 2A/dm2Carry out
After electrolysis, electrolysis 20h, the COD of water outlet is 2200mg/L, and COD clearances are that 85.5%, BOD/COD is 0.38.
Embodiment 2
It is 26000mg/L by the initial COD of 1L, the waste water that BOD/COD is less than 0.05 is first passed through in iron-carbon micro-electrolysis filler tower
(filler is iron and carbon according to 8:2.2 volume ratio sintering is formed, and particle diameter is 3mm), adjust in pH to 3, aeration, processing procedure
PH is maintained in 3-4, after being disposed；PH to 8 is adjusted, after press filtration, filtrate is taken, adds sodium chloride, dosage is 15kg/t, then is thrown
Plus MnO, dosage is 12kg/t, iridium ruthenium plate is plated as anode using titanium, using stainless steel plate as negative electrode, using current density as 2A/dm2Enter
After row electrolysis, electrolysis 20h, the COD of water outlet is 3380mg/L, and COD clearances are that 87%, BOD/COD is 0.36.
Embodiment 3
It is 43500mg/L by the initial COD of 1L, the waste water that BOD/COD is less than 0.05 is first passed through in iron-carbon micro-electrolysis filler tower
(filler is iron and carbon according to 8:2.4 volume ratio sintering is formed, and particle diameter is 4mm), adjust and tieed up in pH to 3, aeration, processing procedure
PH is held in 3-4, after being disposed；PH to 8 is adjusted, after press filtration, filtrate is taken, adds sodium chloride, dosage is 15kg/t, then is added
MnO, dosage is 16kg/t, iridium ruthenium plate is plated as anode using titanium, using stainless steel plate as negative electrode, using current density as 2A/dm2Carry out
After electrolysis, electrolysis 20h, the COD of water outlet is 5220mg/L, and COD clearances are that 88%, BOD/COD is 0.38.
Embodiment 4
It is 43500mg/L by the initial COD of 1L, the waste water that BOD/COD is less than 0.05 is first passed through in iron-carbon micro-electrolysis filler tower
(filler is iron and carbon according to 8:2.4 volume ratio sintering is formed, and particle diameter is 4mm), adjust and tieed up in pH to 3, aeration, processing procedure
PH is held in 3-4, after being disposed；PH to 8 is adjusted, after press filtration, filtrate is taken, adds sodium chloride, dosage is 15kg/t, then is added
MnO, dosage is 20kg/t, iridium ruthenium plate is plated as anode using titanium, using stainless steel plate as negative electrode, using current density as 2A/dm2Carry out
After electrolysis, electrolysis 20h, the COD of water outlet is 4350mg/L, and COD clearances are that 90%, BOD/COD is 0.38.
Embodiment 5
It is 52480mg/L by the initial COD of 1L, the waste water that BOD/COD is less than 0.05 is first passed through in iron-carbon micro-electrolysis filler tower
(filler is iron and carbon according to 8:1.8 volume ratio sintering is formed, and particle diameter is 2mm), adjust in pH to 3, aeration, processing procedure
PH is maintained in 3-4, after being disposed；PH to 8 is adjusted, after press filtration, filtrate is taken, adds sodium chloride, dosage is 15kg/t, then is thrown
Plus MnO, dosage is 20kg/t, iridium ruthenium plate is plated as anode using titanium, using stainless steel plate as negative electrode, using current density as 2A/dm2Enter
After row electrolysis, electrolysis 20h, the COD of water outlet is 7767mg/L, and COD clearances are that 85.2%, BOD/COD is 0.37.
Embodiment 6
It is 62890mg/L by the initial COD of 1L, the waste water that BOD/COD is less than 0.05 is first passed through in iron-carbon micro-electrolysis filler tower
(filler is iron and carbon according to 8:1.5 volume ratio sintering is formed, and particle diameter is 5mm), adjust and tieed up in pH to 3, aeration, processing procedure
PH is held in 3-4, after being disposed；PH to 8 is adjusted, after press filtration, filtrate is taken, adds sodium chloride, dosage is 15kg/t, then is added
MnO, dosage is 25kg/t, iridium ruthenium plate is plated as anode using titanium, using stainless steel plate as negative electrode, using current density as 2A/dm2Carry out
After electrolysis, electrolysis 20h, the COD of water outlet is 9120mg/L, and COD clearances are that 85.5%, BOD/COD is 0.4.
Claims (6)
1. COD removal efficiency, the method for biochemical in a kind of raising organic wastewater, it is characterised in that methods described includes following step
Suddenly：
(1) organic wastewater is passed through in the packed tower equipped with iron carbon filler, controls pH to maintain 3-4 by pH on-line computing models,
Aerated reaction 2-6h, then solution is adjusted into pH to 8, the filtrate handled by packed tower is made in further flocculating setting, blowing；
(2) sodium chloride, MnO are added in filtrate made from step (1), in the case where pH is 8, electrocatalysis oxidation reaction is carried out, so that
Remove the pollutant in organic wastewater.
2. according to the method described in claim 1, it is characterised in that COD contents are in organic wastewater described in step (1)
10000-70000mg/L, BOD/COD are less than 0.05.
3. according to the method described in claim 1, it is characterised in that iron carbon filler described in step (1) is carbon and iron through oversintering
It is made, wherein the volume ratio of iron and carbon is 8:1~3.
4. according to the method described in claim 1, it is characterised in that described in step (1) in iron carbon filler iron carbon particle particle diameter
For 2~6mm.
5. according to the method described in claim 1, it is characterised in that sodium chloride addition described in step (2) is 15kg/t；Institute
The addition for stating MnO is 8-30kg/t.
6. according to the method described in claim 1, it is characterised in that the condition of electrocatalytic oxidation is described in step (2)：Anode
Iridium ruthenium is plated for titanium, negative electrode is stainless steel, and current density is 2A/dm2, electrolysis time is 20h, and temperature is room temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710480393.4A CN107162126A (en) | 2017-06-22 | 2017-06-22 | COD removal efficiency, the method for biochemical in a kind of raising organic wastewater |
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| CN201710480393.4A CN107162126A (en) | 2017-06-22 | 2017-06-22 | COD removal efficiency, the method for biochemical in a kind of raising organic wastewater |
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| CN107162126A true CN107162126A (en) | 2017-09-15 |
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| CN201710480393.4A Pending CN107162126A (en) | 2017-06-22 | 2017-06-22 | COD removal efficiency, the method for biochemical in a kind of raising organic wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955831A (en) * | 2021-11-26 | 2022-01-21 | 中国人民解放军92609部队 | Electrochemical in-situ purification method and purification device for biochemical wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746912A (en) * | 2008-12-16 | 2010-06-23 | 中山市紫方环保技术有限公司 | Method for treating high-concentration organic industrial waste water and equipment thereof |
| CN201770558U (en) * | 2010-04-15 | 2011-03-23 | 赵立功 | Equipment for deeply treating and recycling coked wastewater |
| CN104496089A (en) * | 2014-12-06 | 2015-04-08 | 中国铝业股份有限公司 | Treatment method for heavy metal wastewater containing degradation-resistant organic matters |
| CN105800862A (en) * | 2014-12-31 | 2016-07-27 | 北京清大国华环境股份有限公司 | Rubber wastewater treatment method and apparatus thereof |
-
2017
- 2017-06-22 CN CN201710480393.4A patent/CN107162126A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746912A (en) * | 2008-12-16 | 2010-06-23 | 中山市紫方环保技术有限公司 | Method for treating high-concentration organic industrial waste water and equipment thereof |
| CN201770558U (en) * | 2010-04-15 | 2011-03-23 | 赵立功 | Equipment for deeply treating and recycling coked wastewater |
| CN104496089A (en) * | 2014-12-06 | 2015-04-08 | 中国铝业股份有限公司 | Treatment method for heavy metal wastewater containing degradation-resistant organic matters |
| CN105800862A (en) * | 2014-12-31 | 2016-07-27 | 北京清大国华环境股份有限公司 | Rubber wastewater treatment method and apparatus thereof |
Non-Patent Citations (1)
| Title |
|---|
| 中国环境科学学会: "《中国环境科学学会学术年会论文集》", 31 August 2010, 中国环境科学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955831A (en) * | 2021-11-26 | 2022-01-21 | 中国人民解放军92609部队 | Electrochemical in-situ purification method and purification device for biochemical wastewater |
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