CN104326605A - Method for increasing biodegradability of alcohol waste water - Google Patents
Method for increasing biodegradability of alcohol waste water Download PDFInfo
- Publication number
- CN104326605A CN104326605A CN201410544124.6A CN201410544124A CN104326605A CN 104326605 A CN104326605 A CN 104326605A CN 201410544124 A CN201410544124 A CN 201410544124A CN 104326605 A CN104326605 A CN 104326605A
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- CN
- China
- Prior art keywords
- waste water
- alcohol waste
- biodegradability
- treatment
- iron filings
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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
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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 Sorption (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a method for increasing biodegradability of alcohol waste water, which belongs to the waste water processing method field. The method comprises the following steps: filtering an alcohol waste water grid, adjusting waste water by hydrochloric acid to pH value of 2-5, pumping waste water in a reactor, adding a certain amount of mixture of iron filings and active carbon, introducing air in the reaction for aeration, after reacting for a certain time in the reactor, adjusting pH value of the effluent at a water outlet at the upper end of the reactor to 8-9 by alkali lye, depositing, and discharging an supernatant which is the pretreated waste water, which provides favorable condition for subsequent biochemical treatment. The method for increasing the biodegradability of the alcohol waste water employs an iron filings-active carbon microelectrolysis treatment process to pretreat the alcohol waste water, a degradation-resistant organic matter in the alcohol waste water can be obviously removed, BOD5/COD can be greatly increased, lifting amplitude is increased as high as 67%, biodegradability is obviously increased, and the method provides the favorable condition for subsequent biochemical treatment.
Description
Technical field
The present invention relates to a kind of method improving alcohol waste water biodegradability, belong to method of wastewater treatment field.
Background technology
The waste water that alcohol production process produces is a kind of high concentrated organic wastewater, its COD concentration reaches 20000 ~ 60000mg/L, but BOD5 is generally on the low side, and namely the BOD5/COD of waste water is lower, hardly degraded organic substance residual more in waste water, quite unfavorable to follow-up Aerobic biological process.For better processing such alcohol waste water, pre-treatment need be carried out to such waste water, to improve its biodegradability, for follow-up biochemical treatment provides favourable condition.
Therefore, study a kind for the treatment of effect good, wastewater biodegradability can be improved, run simple and that cost the is low pretreatment process being applicable to alcohol waste water there is very high application prospect.
Summary of the invention
The present invention aim to provide a kind for the treatment of effect good, wastewater biodegradability can be improved, run simple and that cost the is low pretreatment process being applicable to alcohol waste water.
The method of raising alcohol waste water biodegradability of the present invention, comprises the following steps:
After alcohol waste water grid is filtered, waste water hydrochloric acid regulates inlet flow-patterm to 2-5, waste water is pumped in reactor, add a certain amount of iron filings-activated carbon mixture again, pass into air aeration to device in reaction simultaneously, react certain hour in reactor after, the water outlet of reactor upper end water outlet is regulated pH to 8-9 with alkali lye, precipitation is discharged supernatant water and is the good waste water of pre-treatment, for follow-up biochemical treatment provides favourable condition.
Preferably, iron filings-activated carbon mixture that the pre-treatment of iron filings-activated carbon mixture of the present invention to be weight ratio be 2:3 is good, consumption is 10g/L.
Preferred, air aeration of the present invention is liquid-gas ratio is 1:2, and the reaction times is 60min.
Preferred further, iron filings treatment process of the present invention is some for getting waste iron filing, and first with tap water cleaning, the sulfuric acid then adding 6% soaks 30min, firmly stirs simultaneously and removes its surperficial iron rust, soak the some time again after rust cleaning with clear water, for subsequent use.
Further preferred, activated carbon treatment method of the present invention is some for getting granulated active carbon, first adds alcohol waste water and soaks 1h, make gac saturated, lose adsorption.Then gac is put into baking oven and dry 2h at 120 DEG C, for subsequent use.
In method of the present invention, adopt iron filings-activated carbon microelectrolysis processing technique to carry out pre-treatment to alcohol waste water, while removing wherein poisonous and harmful substances, improve the B/C ratio of waste water, will the effect improving follow-up Aerobic biological process be conducive to.The mechanism of the method is: when the light electrolysis drill traverse be made up of iron filings and gac enters in waste water solution, forms numerous corrosion microbattery.Under the condition of slant acidity (pH=2-5), waste water produces a large amount of nascent states [H] and Fe through micro-electrolysis reaction
2+, can with the many component generation redox reaction mouths in alcohol waste water.Such as at negative electrode, electrode reaction produce activity [H] can with many component generation reduction reactions in waste water, make the mass transfer of some bio-refractory become the material of easy biochemical treatment.Meanwhile, iron filings produce Fe in acid condition
2+, can Fe be oxidized to
3+, by adjust pH to alkalescence, generate the Fe (OH) with strong adsorption activity
3.Therefore, the pre-treatment of iron filings-activated carbon light electrolysis groove has the multiple effects such as adsorption-flocculation, redox and complexing, can reach the object removing hardly degraded organic substance and colourity in waste water.
Through a large number of experiments show that, when pH to 2 ~ 4 are adjusted in alcohol waste water water inlet, the micro-electrolysis reaction time is 1h, aeration 1h after electrolysis, and aeration water outlet COD is stabilized in 3000 ~ 3600mg/L, and clearance reaches about 50%. sludge quantity is about 35g/L.The BOD5 of now light electrolysis water outlet is that 1700 ~ 2000mg/L, BOD5/C0D are increased to about 0.55 from 0.33 before light electrolysis, and the amplitude that promotes, up to 67%, proves that the raising of its biodegradability is very remarkable.Analyze from treatment mechanism, the treatment effect of iron chips micro-electrolysis has benefited from the comprehensive action such as absorption and bed filtration of electrochemical redox reaction, the flocculation of microbattery reaction product, the attached collection of the electricity of iron filings to flco, newborn flco.For organism oxidizable in alcohol waste water, as alcohol, aldehyde and phenol etc., anode can occur the oxidizing reaction that similar strong oxidizer causes, and such as phenol can direct oxidized decomposition on anode.In alcohol waste water, tannin hydrolysate gallic acid is polyphenol, decomposes by anodic oxidation.In addition, microbattery reaction is carried out in the electrolytic solution, although brewing wastewater electroconductibility is not strong, constantly carries out in acid condition, Fe with corrosion
2+concentration constantly increases, and solution conductivity strengthens.And as Fe3+ reduction, Fe
2+solution is best solvent, effectively can promote the carrying out of electrochemical reaction.Iron filings are active metals, electropotential less (E0=-O.44v), volatile de-electronation.It can reduce, and some easily obtain the hardly degraded organic substance of electronics, and as nitro-compound, nitroso compound etc., reduction generates the compound of easily degraded, improves the biodegradability of waste water.Owing to having current flowing in microbattery, by its joint effect, there is electrical effect at the surrounding them of microbattery, make the charged particle displacement under electric field action in waste water, the pollutants transfer impelling some charged deposits to two electrodes, thus removes these charged contaminants.
In addition, due to Fe
2+continuous generation, effectively can overcome the polarized action of anode, thus promote the galvanic corrosion of iron, make Fe
2+a large amount of pass into solution.Waste water adds lime slurry after micro cell process, regulates pH to 8 ~ 9, simultaneously under aeration effect, makes Fe in solution
2+form Fe (OH)
2with Fe (OH)
3colloid, the mononuclear complex precipitation of the one-step hydrolysis Cheng Tie that goes forward side by side.It is active that this complex compound has higher adsorption-flocculation, effectively can adsorb the organic substance in waste water, and in addition, under the effect of micro-galvanic cell surrounding electric field, the pollution substance existed with colloidal state in waste water can complete electrophoretic deposition process in very short time.Therefore, iron chips micro-electrolysis pre-treatment alcohol waste water can play the multiple effects such as adsorption-flocculation, redox and complexing, effectively can remove and change the hardly degraded organic substance in water.
The method of raising alcohol waste water biodegradability of the present invention, iron filings-activated carbon microelectrolysis processing technique is adopted to carry out pre-treatment to alcohol waste water, significantly can remove the hardly degraded organic substance in alcohol waste water, greatly improve BOD5/COD simultaneously, lifting amplitude is up to 67%, significantly improve biodegradability, for follow-up biochemical treatment provides favourable condition.
Embodiment
Embodiment one:
Get waste iron filing some, first with tap water cleaning, the sulfuric acid then adding 6% soaks 30min, firmly stirs simultaneously and removes its surperficial iron rust, soak the some time again after rust cleaning with clear water, for subsequent use.
Get granulated active carbon some, first add alcohol waste water and soak 1h, make gac saturated, lose adsorption.Then gac is put into baking oven and dry 2h at 120 DEG C, for subsequent use.
The gac getting the iron filings after cleaning rust cleaning and drying is that 2:3 carries out Homogeneous phase mixing according to weight ratio, obtains iron filings-activated carbon mixture.
After alcohol waste water grid is filtered, waste water hydrochloric acid regulates inlet flow-patterm to 2-5, waste water is pumped in reactor, add the above-mentioned prepared iron filings-activated carbon mixture of 10g/L again, simultaneously passing into liquid-gas ratio to device in reaction is that the air of 1:2 carries out aeration, after reacting 60min, the water outlet of reactor upper end water outlet is being regulated pH to 8-9 with alkali lye in reactor, precipitation is discharged supernatant water and is the good waste water of pre-treatment, for follow-up biochemical treatment provides favourable condition.
Embodiment two: treatment effect
Use the method for raising alcohol waste water biodegradability of the present invention, carry out pre-treatment to the alcohol waste water of certain grain distillery, pretreating effect as shown in Table-1.
Table-1 pretreating effect
As can be seen from table-1, pretreated waste water COD clearance reaches 47.4%, BOD5 clearance reaches 13.0%, significantly can remove the hardly degraded organic substance in alcohol waste water, greatly improve BOD5/COD simultaneously, lifting amplitude, up to 67%, significantly improves biodegradability, for follow-up biochemical treatment provides favourable condition.
Claims (5)
1. improve the method for alcohol waste water biodegradability, comprise the following steps:
After alcohol waste water grid is filtered, waste water hydrochloric acid regulates inlet flow-patterm to 2-5, waste water is pumped in reactor, add a certain amount of iron filings-activated carbon mixture again, pass into air aeration to device in reaction simultaneously, react certain hour in reactor after, the water outlet of reactor upper end water outlet is regulated pH to 8-9 with alkali lye, precipitation is discharged supernatant water and is the good waste water of pre-treatment, for follow-up biochemical treatment provides favourable condition.
2. the as claimed in claim 1 method improving alcohol waste water biodegradability, it is characterized in that described iron filings-activated carbon mixture to be weight ratio be iron filings-activated carbon mixture that the pre-treatment of 2:3 is good, consumption is 10g/L.
3. the as claimed in claim 1 method improving alcohol waste water biodegradability, it is characterized in that described air aeration be liquid-gas ratio is 1:2, the reaction times is 60min.
4. the method improving alcohol waste water biodegradability as claimed in claim 1 or 2, it is characterized in that described iron filings treatment process is some for getting waste iron filing, first clean with tap water, then the sulfuric acid adding 6% soaks 30min, firmly stir simultaneously and remove its surperficial iron rust, the some time is soaked with clear water again after rust cleaning, for subsequent use.
5. the method improving alcohol waste water biodegradability as claimed in claim 1 or 2, is characterized in that described activated carbon treatment method is some for getting granulated active carbon, first adds alcohol waste water and soaks 1h, make gac saturated, lose adsorption; Then gac is put into baking oven and dry 2h at 120 DEG C, for subsequent use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544124.6A CN104326605A (en) | 2014-10-15 | 2014-10-15 | Method for increasing biodegradability of alcohol waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544124.6A CN104326605A (en) | 2014-10-15 | 2014-10-15 | Method for increasing biodegradability of alcohol waste water |
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| CN104326605A true CN104326605A (en) | 2015-02-04 |
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| CN201410544124.6A Pending CN104326605A (en) | 2014-10-15 | 2014-10-15 | Method for increasing biodegradability of alcohol waste water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311273A (en) * | 2017-06-14 | 2017-11-03 | 中国石油化工股份有限公司 | A kind of high-efficiency pretreatment method of Polyester wastewater |
| CN107555701A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | Low-cost coking wastewater treatment method |
| CN114230049A (en) * | 2021-12-31 | 2022-03-25 | 贵州筑信水务环境产业有限公司 | Pretreatment system for white spirit brewing wastewater catalytic oxidation coupling neutralization precipitation and application |
-
2014
- 2014-10-15 CN CN201410544124.6A patent/CN104326605A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107555701A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | Low-cost coking wastewater treatment method |
| CN107555701B (en) * | 2016-06-30 | 2020-09-29 | 鞍钢股份有限公司 | Low-cost coking wastewater treatment method |
| CN107311273A (en) * | 2017-06-14 | 2017-11-03 | 中国石油化工股份有限公司 | A kind of high-efficiency pretreatment method of Polyester wastewater |
| CN114230049A (en) * | 2021-12-31 | 2022-03-25 | 贵州筑信水务环境产业有限公司 | Pretreatment system for white spirit brewing wastewater catalytic oxidation coupling neutralization precipitation and application |
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Application publication date: 20150204 |
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