CN102531276B - Method and device for treating organic sewage through nanometer aeration micro-electrolysis combined with molecular sieve - Google Patents
Method and device for treating organic sewage through nanometer aeration micro-electrolysis combined with molecular sieve Download PDFInfo
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Abstract
A method for treating organic sewage through nanometer aeration micro-electrolysis combined with a molecular sieve includes steps of (A) performing closed anaerobic acidizing pretreatment on sewage to be treated; (B) performing micro-electrolysis reaction on the water after the acidizing pretreatment; (C) adjusting the water after the micro-electrolysis reaction into neutral water, and discharging the water after biofiltration; and (D) leading partial nanometer-aerated water discharged after the biofiltration and the water after the acidizing pretreatment to perform micro-electrolysis reaction. The method and a device for treating organic sewage through nanometer aeration micro-electrolysis combined with the molecular sieve have the advantages of being wide in application range, fast in reaction speed, simple in technological process, long in service life, small in investment cost, convenient to operate and maintain, low in operation cost, stable in treatment effect and the like.
Description
Technical field
The present invention relates to a kind of technological method of sewage disposal, relate more specifically to a kind of method for the treatment of organic sewage through nanometer aeration micro-electrolysis combined with molecular sieve.
The invention still further relates to a kind of device of realizing aforesaid method.
Background technology
High concentration organic sewage contains a large amount of larger molecular organicses, and characteristic is that biodegradability is poor, the C/N ratio is low.If directly discharging is large to the water pollution degree, and intractability is high, and environment is caused severe contamination.How to improve processing efficiency, to reduce investment very crucial for high density, hard-degrading high concentrated organic sewage are processed project.Existing treatment technology is processed the high concentration organic sewage effluent quality and is difficult to be up to state standards, even water quality can be up to standard, required investment is also high.Thus, seek a kind of economy, rationally, effectively the high concentration organic sewage treatment process is very urgent.
In the known sewage disposal, micro-electrolysis reactor commonly used difficult prospect ground in long-time running keeps the activity of height, need often to add activator and carry out " activation ", not only processing efficiency is low, treatment time is long, more because filler is prone to and hardens, stops up, affect little electrolysis continue carry out, cause " scabbing ", " passivation ", " dead " problem.Behind reactor operation certain hour, in the situation that the pH value raises to some extent, also can affect the processing efficiency of reactor simultaneously.
And existing treatment efficiency of biological filter is low, and oxygen transfer ability and molten gas efficient are poor, and backwashing period is short, is difficult to the impact load of opposing high density.
Summary of the invention
The object of the present invention is to provide a kind of method for the treatment of organic sewage through nanometer aeration micro-electrolysis combined with molecular sieve.
Another purpose of the present invention is to provide a kind of device of realizing aforesaid method.
For achieving the above object, the method for the treatment of organic sewage through nanometer aeration micro-electrolysis combined with molecular sieve provided by the invention the steps include:
A) treatment sewage seals the anaerobic acidification pre-treatment;
B) the pretreated water of acidifying carries out micro-electrolysis reaction;
C) water behind the micro-electrolysis reaction is adjusted to neutral water, carries out discharging after the biofiltration;
D) the part water of biofiltration discharge carries out micro-electrolysis reaction through nanometer aeration with the pretreated water of acidifying.
Described method, wherein, the pretreated temperature of acidifying is room temperature, pH is 7.5-8.5.
Described method, wherein, micro-electrolysis reaction adopts the iron carbon filler, and iron carbon mass ratio is 2: 3-1: 1, pH is 2.5-4.5.
Described method, wherein, biofiltration adopts the flyash molecular sieve to adsorb and ion-exchange.
Described method, wherein, the water of part water after acidification of discharging after the biofiltration carries out micro-electrolysis reaction.
Device for realizing aforesaid method provided by the invention, it comprises:
Acidification pool, its water outlet connects the water-in of micro cell;
The water outlet of micro cell connects the water-in of biological filter by equalizing tank, the water outlet of biological filter is connected to the water-in of micro cell by a nanometer aeration machine;
Be filled with the iron carbon filler in the described micro cell;
Be filled with the flyash molecular sieve in the described biological filter.
Described device, wherein, the bottom of acidification pool, micro cell and biological filter all respectively is provided with mud discharging mouth.
Described device, wherein, the bottom of acidification pool, micro cell and equalizing tank all respectively is provided with agitator.
Described device wherein, is provided with heating unit and temperature control unit in the acidification pool.
Described device, wherein, the bottom of biological filter is provided with aeration plate, and this aeration plate is connected to an aerator.
The present invention organically is combined as a whole acidification pool, micro cell, three parts in biological filter, acidification pool inner sealing anaerobism is carried out the acidifying pre-treatment to high concentration organic sewage, the preliminary Biodegradability of Wastewater that improves reduces potential of hydrogen, simultaneously for the little electrolysis of ensuing nanometer aeration is prepared; Fill a kind of filler of efficient iron carbon in the micro-electrolysis reactor, use simultaneously high efficiency nanometer aeration device to carry out aeration, can effectively remove the hardly degraded organic substance in the sewage, further improved the biodegradability of sewage, the Pollutants in Wastewater matter that more thoroughly process under microbial process last molecular sieve biological filter improves effluent quality.
The advantages such as that the present invention has is applied widely, speed of reaction is fast, technical process is simple, long service life, investment cost are few, convenient operating maintenance, running cost is low, treatment effect is stable.
Description of drawings
Fig. 1 is the device schematic diagram for the treatment of organic sewage through nanometer aeration micro-electrolysis combined with molecular sieve of the present invention.
Primary clustering nomenclature in the accompanying drawing:
1 acidification pool; 2 micro cells; 3 biological filters; 4 water inlet pipes; 5 nanometer aeration machines; 6 aeration tubes; 7 temperature controllers; 8 warmings probe; 9 heating zones; 10 iron carbon fillers; 11 molecular sieves; 12 mud discharging mouths; 13 water pumps; 14 stirrers; 15 equalizing tanks; 16 aeration plates; 17 aerators.
Embodiment
Acidification pool of the present invention is to utilize the environment of sealing anaerobism that high concentration organic sewage is carried out the acidifying pre-treatment, tentatively improves wastewater biodegradability, reduces simultaneously potential of hydrogen, for the little electrolysis of ensuing nanometer aeration and flyash molecular sieve biological filter preparing.
Micro cell (claiming again internal electrolysis) is in cold situation, utilizes the micro-electrolysis material (iron carbon filler) self that is filled in the sewage to produce the 1.2V potential difference waste water is carried out electrolysis treatment, to reach the purpose of degradable organic pollutant.
The iron carbon filler that uses in the nanometer aeration micro cell of the present invention is known products (it is available from the fertile product that moistens Environmental Protection Technology Co., Ltd of the general mattress in Weifang that the present invention adopts), it is the iron carbon filler that utilizes industrial discarded iron filings to prepare, use nano bubble to hold and improve the micro cell activity, in the biological filter, also used the standby molecular sieve of solid waste coal ash for manufacturing to do carrier.When disposing of sewage, also accomplished " minimizing " of solid waste.
The nascent state ferrous ion that anodic reaction produces has stronger reducing power, can make some organism reduction, (the two keys such as carboxy CO OH, azo-group-N=N-) are opened, and make part difficult degradation ring-type become the small organic molecule of readily biodegradable and improve biodegradability with the long-chain organic substance decomposing also can to make some unsaturated group.In addition, divalence and ferric ion are good flocculation agents, the pH that regulates sewage can make iron ion become the flocks of oxyhydroxide, and the suspension in the absorption sewage or molecule and the organic polymer of colloidal attitude are removed simultaneously some organic pollutants matter sewage is purified.Cathodic reaction produces a large amount of nascent states [H] and [O], under the condition of slant acidity, these activeconstituentss all can with sewage in many component generation redox reactions, make organic macromolecule generation chain-scission degradation, thereby eliminated the colourity of organic sewage, improved the biodegradability of sewage.Can be used as the pre-treating technology of biological treatment, be beneficial to sedimentation and the bio-film colonization of mud.
Use nanometer aeration catalysis and micro-electrolysis reactor to remain high reactivity in long-time running, do not need often " activation ", operating mass is stable, reliable." scabbing ", " passivation ", " dead bed " problem of conventional iron bed have been solved.The little electrolysis process of aeration iron charcoal is the technique of pre-treating high concentration organic waste water of suiting, and present method is applied widely, treatment effect good, with low cost, convenient operating maintenance, does not need the advantages such as power consumption resource.The processing that this technique is used for high concentration organic sewage not only can reduce COD and colourity significantly, and can greatly improve the biodegradability of waste water.
The filler flyash molecular sieve that the biological filter is selected among the present invention is a known products (the present invention adopt be product available from Beijing Dorsun International Technology Development Co., Ltd.), and this flyash molecular sieve is to utilize solid waste flyash as the synthetic molecular sieve of raw material.The flyash molecular sieve has good adsorbed ion switching performance to the pollutent in the micro-polluted water, its exchange capacity is much larger than gac and ion exchange resin, therefore can be used as the efficient adsorption material of advanced treatment of wastewater reuse, thereby provide technical support for advanced treatment of wastewater.Simultaneously the flyash molecular sieve has the characteristic that microorganism easily adheres to, and easy exploiting, price honest and clean, have no side effect.Molecular sieve can promote the transmission of ion ammonium as spherical biofilm carrier, improve denitrification effect; In operational process, bio-regeneration recycles for a long time continuously, can improve the denitrification effect of nitration denitrification system, reduces the turbidity of water outlet, reduces the concentration of water outlet suspended particle.Compare with common biological filter, the molecular sieve biological filter has the advantages such as molten gas efficient is high, and backwashing period is long, and anti-ammonia nitrogen impact load is good, and is easy to operate, all has some superiority at aspects such as investment, occupation of land, operational management, processing cost, power consumptions.
The present invention at first imports treatment sewage in the acidification pool 1, the sealing anaerobism is carried out the acidifying pre-treatment to high concentration organic sewage, the preliminary Biodegradability of Wastewater that improves, reduce simultaneously potential of hydrogen, for the little electrolysis of ensuing nanometer aeration is prepared, be provided with agitator 14 in the lower end of acidification pool 1, prevent the alluvial of bottom mud.Temperature in the acidification pool 1 is controlled at 25 ℃ by temperature controller formula 7, when warming probe 8 temperature that detect acidification pool 1 are higher than when temperature required the heat-processed of temperature controller 7 stopped heating bands 9.The mud that produces in the acidization is discharged by mud discharging mouth 12.The pretreated pH of acidifying is controlled between the 7.5-8.5, and hydraulic detention time is 24h, and acidifying preprocessing part COD, ammonia nitrogen removal frank can reach 30%-50%.
Acidification pool 1 pumps into pretreated supernatant liquor by water pump 13 water-in of micro cell 2, be filled with iron carbon filler 10 in the micro cell, the ratio of iron carbon is 2: 3-1: 1, pH is controlled between the 2.5-4.5, Dissolved Oxygen concentration Control is between 0.025-0.03, hydraulic detention time is 60-100min, and the little electrolysis section COD clearance of nanometer aeration can reach more than 80%.Through micro-electrolysis reaction, the COD concentration in the sewage is by being reduced to 400mg/L more than the former 2000mg/L, and ammonia nitrogen concentration is by being reduced to 50mg/L more than the former 300mg/L.
Water outlet through microelectrolysis processing flows in the equalizing tank 15, adds Na in equalizing tank
2CO
3, regulating under the effect of stirrer 14 becomes neutrality (mud in the micro cell 2 is discharged by mud discharging mouth 12), then pumps into biological filter 3 and make advanced treatment under the effect of water pump 13; Be filled with flyash molecular sieve filling 11 in the biological filter 3, common aerator 17 aerations are used in the below of biological filter 3, utilize under the characterization of adsorption and ion exchange of flyash molecular sieve, first a large amount of gathering pollution substances, then under the effect of microorganism, with the degradation of pollutant of absorption, the pollution substance in the iterative cycles deeply treating wastewater; Hydraulic detention time in the biological filter 3 is that 300-500 divides the second month in a season, and water outlet COD clearance is up to 95-98%, and ammonia nitrogen removal frank can reach more than 90%, basically reaches sewage drainage standard.
Some is as phegma in the process water outlet of depth type filtration that discharge biological filter 3, the aeration tube 6 that connects by nanometer aeration machine 5 is back in the micro cell 2, after mixing under the effect of stirrer 14, carry out micro-electrolysis reaction with the pretreated sewage of acidifying, further improve wastewater biodegradability, since nano bubble in water the residence time above four hours, so that the nanometer aeration micro-electrolysis reactor remains high reactivity in long-time running, do not need often " activation ", not only improve processing efficiency, reduce the treatment time, more can prolong filler work-ing life, avoided filler because harden, latch up phenomenon, affect further carrying out of little electrolysis, operating mass is stable, reliably.In the situation that the pH value raises to some extent, micro cell still can high efficiencyly move simultaneously.The mud that produces is discharged by mud discharging mouth 12.
Claims (10)
1. the method for a treating organic sewage through nanometer aeration micro-electrolysis combined with molecular sieve the steps include:
A) treatment sewage seals the anaerobic acidification pre-treatment;
B) the pretreated water of acidifying carries out micro-electrolysis reaction;
C) water behind the micro-electrolysis reaction is adjusted to neutral water, carries out discharging after the biofiltration;
D) the part water of biofiltration discharge carries out micro-electrolysis reaction through nanometer aeration with the pretreated water of acidifying.
2. method according to claim 1, wherein, the pretreated temperature of acidifying is room temperature, pH is 7.5-8.5.
3. method according to claim 1, wherein, micro-electrolysis reaction adopts the iron carbon filler, and iron carbon mass ratio is 2: 3-1: 1, pH is 2.5-4.5.
4. method according to claim 1, wherein, biofiltration adopts the flyash molecular sieve to adsorb and ion-exchange.
5. method according to claim 1, wherein, the water of part water after acidification of discharging after the biofiltration carries out micro-electrolysis reaction.
6. device of realizing the described method of claim 1, it comprises:
Acidification pool, its water outlet connects the water-in of micro cell;
The water outlet of micro cell connects the water-in of biological filter by equalizing tank, the water outlet of biological filter is connected to the water-in of micro cell by a nanometer aeration machine;
Be filled with the iron carbon filler in the described micro cell;
Be filled with the flyash molecular sieve in the described biological filter.
7. device according to claim 6, wherein, the bottom of acidification pool, micro cell and biological filter all respectively is provided with mud discharging mouth.
8. device according to claim 6, wherein, the bottom of acidification pool, micro cell and equalizing tank all respectively is provided with agitator.
9. device according to claim 6 wherein, is provided with heating unit and temperature control unit in the acidification pool.
10. device according to claim 6, wherein, the bottom of biological filter is provided with aeration plate, and this aeration plate is connected to an aerator.
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| CN103553205B (en) * | 2013-11-01 | 2015-04-22 | 哈尔滨工业大学深圳研究生院 | Ozone micro-electrolysis wastewater treatment device |
| CN104230096B (en) * | 2014-07-25 | 2015-12-09 | 中国环境科学研究院 | A kind of apparatus and method of nanometer aeration iron-carbon micro-electrolysis purification of organic waste water |
| CN104176877B (en) * | 2014-07-25 | 2016-01-20 | 浩蓝环保股份有限公司 | A kind of apparatus and method of three layers of trickling filter advanced treatment waste water of livestock poultry |
| CN104150699B (en) * | 2014-07-25 | 2016-03-16 | 中国环境科学研究院 | A kind of four sections of up soil ooze system Treated sewage reusing treatment unit and treatment process |
| CN104150707B (en) * | 2014-07-25 | 2016-01-20 | 中国环境科学研究院 | The apparatus and method that a kind of blodisc is disposed of sewage |
| CN104402110A (en) * | 2014-11-28 | 2015-03-11 | 黄志红 | Aerobic baffle device |
| CN105016466B (en) * | 2015-06-03 | 2023-08-08 | 福建广汇龙环保科技有限公司 | Vertical multistage AO ecological pool for sewage treatment |
| US11324105B2 (en) * | 2016-06-09 | 2022-05-03 | Charlies Bohdy | Nanoplasmoid suspensions and systems and devices for the generation thereof |
| CN110844980A (en) * | 2019-12-19 | 2020-02-28 | 锦科绿色科技(苏州)有限公司 | Iron-carbon nano electro-catalysis treatment method and equipment for blue-green algae, black and odorous water body and industrial and agricultural sewage |
| CN113233657A (en) * | 2021-04-12 | 2021-08-10 | 常州大学 | Dye wastewater equipment based on micro-electrolysis process |
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