CN1193938C - Catalytic aluminium internally electrolyzing process of treating sewage - Google Patents
Catalytic aluminium internally electrolyzing process of treating sewage Download PDFInfo
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- CN1193938C CN1193938C CN 03115308 CN03115308A CN1193938C CN 1193938 C CN1193938 C CN 1193938C CN 03115308 CN03115308 CN 03115308 CN 03115308 A CN03115308 A CN 03115308A CN 1193938 C CN1193938 C CN 1193938C
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Abstract
The present invention relates to a catalytic aluminium internal electrolysis method of treating sewage, which belongs to the treatment technology of sewage such as domestic sewage and industrial sewage, particularly to a treatment method of colored hardly degradable sewage. Aluminum, copper and zeolite modified by a cationic surface active agent are used as fillings of a catalyst to treat sewerage. The electromotive force of a galvanic cell is very large because the galvanic cell of the present invention is composed of aluminium replacing iron and copper, and lots of heavy metals and organic pollutants can react on the electrodes directly under the anaerobic condition with no aeration. The adopted aluminum and copper can be waste materials of processed work pieces; the zeolite modified by the cationic surface active agent is cheap and can be used for a long time, and the cost of water treatment is low. The sludge quantity of the present invention is less than that of a catalytic iron internal electrolysis method, and the settling property of sludge is good; thus, the method of the present invention and the catalytic iron internal electrolysis method can make mutual supplement to treat colored hardly degradable sewage.
Description
Technical field
The present invention relates to sewage (sanitary sewage, industrial sewage) treatment process, especially relate to treatment process coloured, difficult degradation sewage.
Background technology
Coloured, difficult degradation industrial sewage is the key subjects that ambient water is handled always, for solving this difficult problem, has developed various treatment processs.Internal electrolysis of iron method, iron charcoal internal electrolysis and catalyzed iron internal electrolysis process that the waste material iron filings that wherein utilize metal to process are made filter bed have all played certain effect to the processing of this class sewage.Catalyzed iron internal electrolysis process provides a kind of effective treatment process to coloured, Persistent organic pollutants and deleterious heavy metal industrial sewage, and its ultimate principle adds copper and cats product modification in the internal electrolysis of iron method
Zeolite is as catalyzer, and the charcoal with in the copper replacement iron charcoal method forms iron copper galvanic cell, has enlarged the potential difference between two electrodes, makes more pollution substance play electrochemical reaction on electrode, to improve the water treatment effect.But this method still can not effectively be handled the sewage coloured, difficult degradation of some.
Summary of the invention
The iron that the present invention adopts aluminium to substitute in the catalyzed iron internal electrolysis process carries out sewage disposal, forms filler by the zeolite of aluminium, copper and cats product modification as catalyzer, puts into the filter tank and carries out water treatment.Because aluminium and copper are formed galvanic cell, the electropotential of aluminium is very negative
Therefore two of the aluminum bronze galvanic cell
The potential difference of electrode is very big, has many heavy metals and organic pollutant equally and obtain reduction and removing on electrode.Aluminium is oxidized to Al as anode
3+Enter solution, the Al (OH) that generates in pH6.0～9.0
3With Fe (OH)
3Equally have very strong throwing out, suspended solids, coacervation of colloid precipitation in the sewage can be adsorbed great amount of soluble organic pollutant coprecipitation simultaneously, sewage is further purified.Equally, the zeolite of cats product modification has quickened the mass transfer process of these pollutents to electrode surface to heavy metal and organic pollutant adsorption inrichment, has further improved the water treatment effect.
The inventive method specifically is divided into following a few step:
The first step: copper and aluminium are pressed W
Cu/ W
Al=0.2-1.0 ratio weighing is good, and adding the zeolite of cats product modification according to the situation of sewage, its content is the 0%-10% of aluminium and copper gross weight, and thorough mixing, aluminium, copper and the zeolite of cats product modification are fully contacted, put into the filter tank as filler.Above-mentioned metallic aluminium can be the leftover bits of aluminium flake, aluminium bits, aluminium powder, aluminium ball or aluminium; Metallic copper also can be the leftover bits of sheet, chip, powdery, copper or be processed into tubulose, netted and other shape with copper material.
Second step: transfer pH to arrive suitable value in sewage.The pH scope that the present invention is fit to from acidity to alkalescence all can, but replacement(metathesis)reaction, releasing hydrogen gas take place in aluminium in a large number in strong acid or strong base solution.And copper may be corroded (such as generating ventilation breather) under the highly basic condition, so the present invention adopts pH4.0～10.0 to be advisable.Improve water temperature and help the carrying out that react, the temperature of general water is high more, the water effect is good more, but the large amount of sewage heating can be increased cost of water treatment widely, therefore generally can under the natural temperature of sewage, allow sewage in the filter tank, circulate repeatedly, its reflux ratio was made as 2: 1～5: 1 according to the character of sewage, made sewage that the sufficient reaction times be arranged in the filter tank.Entire reaction course is carried out under the situation of aeration not.
The 3rd step: after reflux finishing, the pH of sewage is transferred to 6.0～9.0, makes the Al that in second step, generates
3+Further generate flocculating agent A l (OH)
3, with suspended solids, coacervation of colloid in the sewage, and the solubility pollutent coprecipitation in the absorption sewage, sewage is further purified.
Advantage of the present invention is as follows:
1. because the present invention substitutes iron with aluminium and copper is formed galvanic cell, the electromotive force of the aluminum bronze galvanic cell of composition is very big, and many heavy metals and organic pollutant can directly be reacted on electrode.And entire reaction is to carry out under the anaerobic conditions of aeration not, do not have dissolved oxygen to participate in the electrode reaction of galvanic cell, more is that pollutent reacts on electrode.Method of the present invention and catalyzed iron internal electrolysis process can complement one another, and some is coloured, difficult degradation sewage is easy to handle with catalyzed iron internal electrolysis process, and some is coloured, the then more easy-to-use Catalyzed Aluminum Internal Electrolysis Process for Treating of difficult degradation sewage.
2. the adsorption and enrichment effect that adds the zeolite of cats product modification has improved treatment effect and speed especially.
3. the pH scope that is suitable for of the present invention is big, and is all suitable from acidity to alkalescence, can carry out under neutral and weak basic condition (handling the pH emission standard of water outlet afterwards) usually.
4. but the waste material of the aluminium metal works that is adopted processing is very cheap; Copper also can be the waste material of metal works processing, and copper it can not consume basically as negative electrode in entire sewage is handled, the expense of copper is disposable investment.The price of the zeolite of cats product modification is also inexpensive, but also life-time service.
The sludge quantity that produces after the electrolysis treatment in the aluminum bronze than catalyzed iron internal electrolysis process lack many, and the settling property of mud is also better than the catalyzed iron internal electrolysis process.
6. the pre-treatment of Chang Zuowei biochemical treatment of the present invention can will remove the poisonous and hazardous hard-degraded substance of microorganism in advance, improved BOD/COD, makes sewage be more suitable for follow-up biochemical treatment, makes the water outlet after the processing reach emission standard.
Embodiment
Embodiment 1: with the inventive method dye wastewater is handled.
Dying of industry sewage is amaranth.pH＝10.0。
The first step: metallic copper and aluminium bits are pressed W
Cu/ W
Al=1.0 ratio weighings are good, add the zeolite of 7% cats product modification of copper and aluminium gross weight, and thorough mixing is formed filler and put into the filter tank.
Second step: the pH that regulates sewage is 6.0, and aeration does not allow sewage at the filter tank internal recycle with 5: 1 reflux ratio at normal temperatures, and hydraulic detention time is 2.5 hours, and sewage is reacted in the filter tank fully.
The 3rd step: quiescent setting 30 minutes, survey its supernatant liquor, handle back B/C and increase, the results are shown in Table shown in 1.
Dying of table 1. sewage treatment effect
| The sewage kind | COD (mg/l) before handling | BOD (mg/l) before handling | Handle back COD (mg/l) | Handle back BOD (mg/l) | Decolorizing effect |
| Dying sewage | 690 | 105 | 430 | 78 | Amaranth → closely colourless |
Embodiment 2: handle dyeing and printing sewage with the inventive method
Dyeing and printing sewage is mazarine, pH ≈ 7.0.
The first step: metallic copper and aluminium bits are pressed W
Cu/ W
Al=0.2 ratio weighing is good, adds the zeolite of 1% cats product modification of copper and aluminium gross weight, and thorough mixing is formed filler and put into the filter tank.
Second step: aeration does not allow sewage at above-mentioned filter tank internal recycle with 2: 1 reflux ratio at normal temperatures, and hydraulic detention time is 1.5 hours, and sewage is reacted in the filter tank fully.
The 3rd step: reflux and finish, quiescent setting 30 minutes is surveyed its supernatant liquor, the results are shown in Table 2.
The treatment effect of table 2. dyeing and printing sewage
| The sewage kind | COD (mg/l) before handling | Handle back COD (mg/l) | Decolorizing effect |
| Dyeing and printing sewage | 366 | 81 | Dark blue → colourless |
Embodiment 3: the inventive method and catalyzed iron internal electrolysis process carry out sewage disposal relatively.
Papermaking wastewater is used catalyzed iron internal electrolysis process and present method parallel test respectively, handles 11 hours, and its result is by shown in the table 3:
Table 3. method of the present invention and catalyzed iron internal electrolysis process are relatively
| Treatment process | COD (mg/l) before handling | Handle back COD (mg/l) | Decolorizing effect |
| Catalyzed iron internal electrolysis process | 800 | 570 | Brownish black → yellowish brown |
| The inventive method | 430 | Brownish black → light brown |
Above-mentioned example is only for the part example among the present invention, and is not as a limitation of the invention.
Claims (1)
1. the method for electrolysis treatment sewage in the Catalyzed Aluminum is characterized in that: adopt the zeolite of aluminium, copper and cats product modification to form filler, by, the first step: copper and aluminium are pressed W
Cu/ W
Al=0.2～1.0 ratio weighings are good, the zeolite that adds the cats product modification according to the situation of sewage, its add-on is 0%～10% of aluminium and a copper gross weight, and thorough mixing, make aluminium, copper fully contacts with the zeolite of cats product modification, put into the filter tank as filler, second step: sewage is transferred pH 4.0～10.0,, make sewage circulation repeatedly in the filter tank under natural temperature according to the character of sewage, reflux ratio is 2: 1～5: 1, make sewage fully reaction in the filter tank, entire reaction course is carried out under the situation of aeration not, the 3rd step: reflux finish after, the pH of sewage is transferred to 6.0～9.0, makes the Al that in second step, generates
3+Further generate flocculating agent A l (OH)
3, with suspended solids, coacervation of colloid in the sewage, and the solubility pollutent coprecipitation in the absorption sewage, make sewage obtain handling and purifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03115308 CN1193938C (en) | 2003-01-31 | 2003-01-31 | Catalytic aluminium internally electrolyzing process of treating sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03115308 CN1193938C (en) | 2003-01-31 | 2003-01-31 | Catalytic aluminium internally electrolyzing process of treating sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1468810A CN1468810A (en) | 2004-01-21 |
| CN1193938C true CN1193938C (en) | 2005-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03115308 Expired - Fee Related CN1193938C (en) | 2003-01-31 | 2003-01-31 | Catalytic aluminium internally electrolyzing process of treating sewage |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303016C (en) * | 2004-04-08 | 2007-03-07 | 同济大学 | Deep treating method of sewage, such as percolate for urban refuse filling area |
| CN100480199C (en) * | 2006-04-27 | 2009-04-22 | 同济大学 | Waste water treatment method by postpositioning catalytic Fe internal electrolysis tank |
| CN100391871C (en) * | 2006-10-19 | 2008-06-04 | 上海交通大学 | Anoxybiotic/aerobic two-section internal electrolysis organic waste water treating method |
| CN102173517B (en) * | 2011-03-10 | 2013-01-16 | 南京大学 | Method for advanced purification of trace amount of thallium in water by using polymer-base nanometer manganese oxide |
| CN102311205A (en) * | 2011-04-04 | 2012-01-11 | 上海丰信环保科技有限公司 | Method for removing organic matters and chrominance in printing and dyeing wastewater |
| KR101458177B1 (en) * | 2013-06-25 | 2014-11-04 | 아산텍 주식회사 | Water-treatment system usning alloy catalyst reactor system |
| CN103708658B (en) * | 2013-12-17 | 2015-08-26 | 绍兴水处理发展有限公司 | Iron aluminium Aerated micro-electrolysis sewage treatment process |
| CN107988529B (en) * | 2017-11-01 | 2019-12-10 | 华南理工大学 | Aluminum alloy strip and application thereof in printing and dyeing sewage treatment |
| CN108609694B (en) * | 2018-04-03 | 2021-03-26 | 浙江师范大学 | Preparation method of iron-carbon micro-electrolysis filler |
| CN117138658B (en) * | 2023-10-31 | 2024-02-09 | 南通华新环保科技股份有限公司 | Micro-electric powder vacuum recovery drying device for odorless treatment |
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2003
- 2003-01-31 CN CN 03115308 patent/CN1193938C/en not_active Expired - Fee Related
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