CN1107443A - Effluent treatment involving iono-oxidation treatment - Google Patents
Effluent treatment involving iono-oxidation treatment Download PDFInfo
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- CN1107443A CN1107443A CN 94103287 CN94103287A CN1107443A CN 1107443 A CN1107443 A CN 1107443A CN 94103287 CN94103287 CN 94103287 CN 94103287 A CN94103287 A CN 94103287A CN 1107443 A CN1107443 A CN 1107443A
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Abstract
The method for purifying waste water features that waste water flows up through plastic column, in which complex electrode of anode made of Fe and Al and cathode made of Fe is immersed in water, and a plastic tank with bottom in shape of funnel is arranged at the top of plastic column. When current flows through electrode, the impurities in waste water is separated out by electrochemical reaction. Then water is filtered, or micro air bubbles are sprayed upward for carrying suspended solid to float, discharging out of column top.
Description
The present invention relates to a kind of waste water is purified and make processing after the method for wastewater treatment of water cycle, this method is particularly useful for removing effectively the dissolved/undissolved impurity in the various industrial waste water that produce, the waste water that produces during for example weaving/chemical technology is produced.
The waste water that produces in the above-mentioned commercial unit, especially weaving/wastewater from chemical industry contain following impurity, need remove these impurity effectively by suitable processing:
Total suspended solid (T.S.S), total dissolved solidss (T.D.S), biochemical oxygen demand (BOD) (B.O.D), chemical oxygen demand (COD) (C.O.D), oil and grease, pigment, washing composition, ammonia nitrogen, sodium percentage composition, heavy metal and toxic compounds, comprising phenols, also need to make pH value reach acceptable level.
Usually adopt coagulation-flocculation-precipitation process to remove these impurity, behind the control pH value, the back is followed the suitable secondary and third stage and is handled.Except pH value, the combination of these processing is not can be with above-mentioned Impurity removal to acceptable tolerable limit, and in addition, they can produce the excessive mud of the impurity that contains very big concentration, and expense is too high.
In addition, for the textile waste of high flow capacity, these methods or system need big space because detention period is long.These methods or system are responsive to the atomic group characteristic in the water.
In traditional coagulation-flocculation-depositing technology, use Tai-Ace S 150, iron(ic) chloride and ferrous sulfate.The chemical mode of removing impurity is as follows:
The flocs unit of aluminium, ferric iron and ferrous oxyhydroxide, when precipitation is insoluble in certain pH value scope, they can remove the impurity in the waste water, aluminum ion, ferrous ion and ferric ion can also and the impurity of band pigment and the throw out generation chemical reaction of final reaction product.This method is with regard to the repetition expense, and expense is very high.
This problem people attempt is solved by adopting traditional dissolved air flotation equipment (DAF system).In known DAF system, the waste water of coagulation pumps in the air dissolves pipeline by a pressure pump with pressurized air, and pressure is 55～85Psig usually, discharges the pressure in the effluent then rapidly, makes excess air become tiny submicroscopic bubble.This traditional very high capital investment of DAF equipment claimed is because it needs special equipment, as high-pressure pump, pipeline, container and analogue.In identical technical field, the patent below also finding, but do not instruct the new technical characterictic of any the present invention:
France: 2488870A
Russia: 1161477A
Russia: 966025A
Japan: 79164761(791220)
Germany: 3830344A
The U.S.: 4540052
European patent: 82810484(821111)
European patent: 82107779(820825)
The applicant had once invented a kind of electrolysis process of handling textile waste, and this method traditional treatment method same as described above is compared to implement and wanted cheap.Above-mentioned electrolysis process comprises waste water (electrolytic solution) is left in the trough, transmits direct current by a sacrifice steel electrode that is arranged in this trough, produces highly active Fe within the predetermined time on the spot
+ 2And Fe
+ 3Ion, with as flocculation agent/ion, they and hydroxide ion (OH) and final suspend/colloidal/dissolved impurity reacts, to form throw out, captures these impurity and remove color.
In above-mentioned electrolytic process, direct current flows through electrode, according to Faraday's law
(Faraday's Law) produced Fe
+ 2, Fe
+ 3And OH
-, consume as the sacrificial electrode of negative electrode.Fe
+ 2, Fe
+ 3With OH
-Ion and other tiny suspension/colloidal/dissolved impurity reaction formation throw out.These throw outs are to bottom settlings or in the buoyant process of top, by absorb and/or adsorption capture suspend and/or colloidal impurity, removed most appearance colors thus.Chemical equation in this process is as follows:
The purpose of this invention is to provide a kind of improved method of wastewater treatment, this method purifies this waste water by means of electrolytic electrochemical reaction, so that from this waste water, remove all dissolved/undissolved impurity effectively, and this waste water can be recycled basically.
The applicant also finds in experiment, after handling waste water by the improved electrolytic process that hereinafter will describe, water after purifying is through filtering, choose wantonly, can also in electrolytic process, in waste water, spray small air bubble if necessary, just can reach the effect that is obtained so far with traditional technology and compare more effectively effect.
Therefore the invention provides a kind of wastewater treatment, the method that purifies, this method comprises that pending waste water is upwards flowed passes the post that plastics are made, the combined electrode that is immersed in is wherein arranged in this post, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, and negative electrode is made of separately iron, this post has a bottom at its top be funnel shaped storage tank made of plastic, giving under the situation of above-mentioned electrifying electrodes, upwards mobile waste water experiences electrochemical reaction, impurity in the waste water is separated, and drain from the top of post, next water is filtered, make through the water after this step purification and pass through a filtration medium, randomly, if desired like this, in the wastewater electrolytic process, pass post and upwards spray submicroscopic air bubble, in order to carry moving upward of suspension in the pending waste water, so that it is discharged by the outlet that is arranged on the column top with the buoyant solid.
The applicant finds can and can reach effective effect by the synergistic processing of the flotation that consists essentially of electrochemical reaction, improved electrolysis, oxidation and dissolved air.
Therefore, the invention provides the method that a kind of wastewater treatment makes its purification and recycles, this method comprises that making waste water pass a post made of plastic upwards flows, this cornice has the combined electrode that soaks in water, the anode of described electrode is made of the mixture of iron and aluminium, negative electrode is made of iron separately, all funnel shaped plastics storage tank at the bottom of the top of above-mentioned post is provided with one, bottom from post under predetermined pressure feeds gasiform oxygen, making oxygen bubble pass waste water upwards flows, make waste water experience electrochemical reaction under the situation of electrifying electrodes, waste water experiences electrochemistry thus, the synergy that oxidation and dissolved air flotation are handled, because this associated treatment is separated impurity from waste water, being deposited in the bottom that is arranged on top of tower is in the funnel shaped storage tank, afterwards, drain from the top of post, the water after the purification is discharged from the top of above-mentioned storage tank.
The applicant had once worked out a kind of with the method for the Impurity removal in the waste water to the safe level scope in early days, these impurity such as phenols, COD, pigment and toxic substance (as the cyanogen class), these waste water are to produce in the production of dyestuff and dyestuff intermediate and the caused by spinning industrial production process, this method comprises that the ozone that makes the amount of pre-determining passes this post with the form of tiny bubble from the bottom of post, contain in the post by highly polluted waste water and granular gac, so that make the active carbon powder fluidization, and formation fluidized-bed, increased area on interface between gac and the waste water for ozone like this, make the impurity in the waste water be oxidized to the biodegradable compound that hangs down molecular polarity thus, these compounds can be adsorbed on the surface of above-mentioned gac, described biodegradable compound keeps contacting with waste water in fluidized-bed within the predetermined time, formed one deck microbial film, to be detained the oxidation products that firmly can not be adsorbed on the above-mentioned gac.
Also find ozone (O
3) when feeding the post that comprises highly polluted waste water (as the waste water from dyestuff and dyestuff intermediate factory and weaving Chemical Manufacture factory etc.) and granular active carbon (GAC), has significant coordination with the synthesis effect, when adopting a sparger to make ozone flow into funnel shaped bottom, it upwards flows, and keeps granular activated carbon bed to be fluidized state.The chemical process that the present invention relates to will be made explanations in conjunction with following different approach, and it comprises:
ⅰ）
A) when ozone when the pillar, a large amount of small bubbles have increased ozone bubbles and have contained interfacial area between the waste water of impurity, have improved the adsorptivity of ozone in waste water thus.The raising of this adsorptivity has increased the oxygenizement of soluble impurity.
B) fluidized-bed of the gac that is provided by the gaseous state bubble has increased ozone O between gac and the waste water
3Interfacial area.This effect has increased the adsorptivity of impurity on activated carbon surface.
C) bubble has also caused the chemisorption of impurity on gac.
D), be difficult to remove or the unmanageable compound of degrading is also can be under this synergy processed falls by ozone oxidation or gac.
ⅱ) the direct reaction of solute (being the waste water dissolved impurity) and ozone; Such reaction can be summarized formulate with one:
M + O
3M’oxid + M”oxid
Wherein M is a solute, M'oxid and M, and " oxid is only very slow or at all can not be by the accurate final oxidation products of the further oxidation of ozone.
ⅲ) solute and scavenging agent material are as HCO
3Humic acids, Cl
-, NH
4Or the like, decompose the OH functional group oxidation of generation automatically by ozone.
The applicant finds in experiment now, with electrolytic process (proposed as this paper) and the same waste water of ozone method combined treatment, can reach goodish effect.
The present invention further also provides a kind of method of wastewater treatment of handling waste water, waste water being purified, this method comprises that the post that waste water is passed be made of plastics upwards flows, this post has the combined electrode that is immersed in the water, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, the negative electrode of above-mentioned electrode is made of iron separately, at the top of above-mentioned post a bottom being arranged is funnel shaped storage tank, and it is made of plastics.This method is included in also that the bottom from pillar feeds ozone under the predetermined pressure, ozone bubbles is upwards flowed pass waste water, make it experience electrochemical reaction under the situation of electrifying electrodes, make waste water experience the synergy that electrochemistry, oxidation and dissolved air flotation are handled thus, because this combined treatment is separated impurity from waste water, when contamination precipitation to the top base that is arranged on post be in the funnel shaped storage tank after, from the column top it is discharged, the water after the purification is discharged from the top of storage tank.
The applicant also further finds in experiment, when adopting improved electrolytic process described herein, when pending waste water also passes through rheomorphism, the synergy of this processing has improved the performance of system, as with purification efficiency, some unmanageable compound such as phenol, dyestuff, the clearance of dyestuff intermediate from waste water, the performance very lower concentration so clearance compound that be difficult to remove is represented, can the surface of electrode be remained upgrade and improve the performance of electrolysis itself without any dirt settling by scraping, can also improve the turbulivity that waste water flows through post, so that improve dispersivity and mass transfer, make system compacter.
Therefore, the present invention also provides a kind of method of wastewater treatment that waste water is purified it of handling, this method comprises that making waste water pass a post that is made of plastics upwards flows, this post has the combined electrode that is immersed in the water, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, negative electrode is made of iron separately, a bottom is arranged at the top of above-mentioned post is the funnel shaped storage tank that is made of plastics, so that giving under the above-mentioned electrifying electrodes state, upwards mobile waste water experiences electrochemical reaction, in above-mentioned post, in pending waste water, also has the gac that exists with particle form, giving the fluidized bed processing that waste water experiences electrochemical treatment and formed by activated carbon granule under the electrifying electrodes situation, impurity in the waste water is separated and is deposited in the bottom funnel of storage tank, drains by outlet.
In another embodiment, the invention provides a kind of method of wastewater treatment that waste water is purified, this method comprises that making waste water pass a post that is made of plastics upwards flows, this post has the combined electrode that is immersed in the water, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, negative electrode is made of iron separately, a bottom is arranged at the top of above-mentioned post is the funnel shaped storage tank that is made of plastics, so that giving the mobile waste water experience electrochemical reaction that makes progress under the situation of above-mentioned electrifying electrodes, above-mentioned post also comprises the ceramic/glass particle that mixes with pending waste water in addition, under the electrifying electrodes situation, waste water experience electrochemical treatment and the fluidized bed processing that constitutes by the ceramic/glass particle, impurity in the waste water is separated and is deposited in the bottom funnel of storage tank, drains by outlet.If necessary, as described herein, optional interchangeable/further the embodiment of present method can also comprise the step of spraying submicroscopic air bubble, spray submicroscopic air bubble in the upward direction, make it pass post, so that the suspended solids that carries in the pending waste water upwards floats, by the outlet that is arranged on the column top it is discharged then.
In preceding method of the present invention, when constituting fluidized-bed by activated carbon granule, because dissolved impurity is adsorbed on the surface of gac by the physical-chemical adsorption, reached effective effect, in addition, owing to make pending waste water produce rheomorphism, and pending waste water experiences improved electrolysis treatment simultaneously, improved the turbulivity of this waste water, the result has increased area between dispersivity and mass transfer and interface.
When fluidized-bed was to use the ceramic/glass bead of special shape to constitute, they were as the inert media of rheomorphism.
As mentioned above, the applicant finds, when adopting improved electrolytic process, when pending waste water also experiences rheomorphism, the synergy of this processing has improved the performance of system, as with purification efficiency, the clearance of some unmanageable compound such as phenols, and those performances of representing of clearances of the compound that therefore is difficult to remove of lower concentration very, can electrode surface be remained upgrade and improve the performance of electrolytic process itself without any dirt settling by scraping, improve waste water and flow through the turbulivity of pillar, make system compact more so that increase dispersivity and mass transfer.
The applicant also further finds, by spray gasiform oxygen/ozone bubble in the waste water of the above-mentioned combination treatment of experience, can surpass some limitation of this combination treatment.
Therefore, the application provides a kind of method of wastewater treatment that waste water is purified, this method comprises that making waste water pass a post that is made of plastics upwards flows, this post has the combined electrode that is immersed in the water, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, negative electrode is made of iron separately, a bottom is arranged at the top of above-mentioned post is the funnel shaped storage tank that has been made of plastics, giving under the above-mentioned electrifying electrodes situation, upwards mobile waste water experiences electrochemical reaction, above-mentioned post further comprises the gac that is present in the particle form in the pending waste water, giving under the electrifying electrodes state, the rheomorphism that waste water just experiences electrochemical treatment and is made up of activated carbon granule under a pressure of being scheduled to, is introduced the gasiform oxygen/ozone from the bottom of post, make waste water experience electrochemistry thus, oxidation, the synergy that fluidisation and dissolved air flotation are handled, impurity is separated from waste water, and is deposited on the bottom in the funnel shaped storage tank, drains by its outlet.
In another embodiment, the invention provides the method for wastewater treatment that another kind makes purification of waste water, this method comprises that making waste water pass a post that is made of plastics upwards flows, this post is not immersed in the combined electrode in the water, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, above-mentioned negative electrode is made of iron separately, a bottom is arranged at the top of above-mentioned post is the funnel shaped storage tank that is made of plastics, giving under the situation of above-mentioned electrifying electrodes, upwards mobile waste water experiences electrochemical reaction, above-mentioned post further comprises the glass/ceramic particle that is present in the pending waste water, when giving electrifying electrodes, waste water experience electrochemical treatment and the fluidized bed processing that is made of the glass/ceramic particle under predetermined pressure, are introduced the gasiform oxygen/ozone from the bottom of post, make waste water experience electrochemistry thus, oxidation, the synergy that fluidisation and dissolved air flotation are handled, impurity is separated from waste water, and is deposited on the bottom in the funnel shaped storage tank, from its outlet it is drained.
The applicant observes the electrochemical treatment of the waste water that proposes as this paper, realizes the purification of waste water by following physical-chemical phenomenon:
(a) electrochemical coagulation of composite electrode generation iron and aluminium and flocculation, the iron of composite anode and aluminium form the oxyhydroxide of iron and aluminium, these oxyhydroxide can capture undissolved impurity, because their volume is bigger, so they can react with some dissolved impurity such as dyestuff, generation is with the insoluble compound of the chelating of " flocs unit " form existence, when the direct current of about 12-16 volt passes through waste water, effect by means of electrode, according to Faraday's law, composite anode enters in the solution, and the result generates aforesaid oxyhydroxide.These oxyhydroxide directly are added to the oxyhydroxide that the dissolving back generates in the water than traditional way with the vitriol of aluminium and iron and have more activity.Therefore the purification efficiency of ' electricity-flocculation ' is more much higher than general flucculation process.Therefore, remove plurality of impurities from waste water aspect, it demonstrates bigger versatility;
(b) by means of Van der Waals (Vanderwal) power, some impurity absorption is on the oxyhydroxide material;
(c) hydrolytic dissociation becomes free functional group, and free functional group and impurity reaction are converted into them harmless compound thus;
(d) electrolytic oxygen is to the oxygenizement of impurity;
(e) some stable compounds are decomposed by the ozone of introducing in this method;
(f) hydrogen reducing that produced of impurity.
(g) gas that sends at electrode, almost with the DAF phenomenon, the impurity that carries flocculation upwards floats to the top of post with them.
As the electrolysis result, the electrochemistry dosage that is added to iron in the waste water and aluminium can be in the scope of about 50mg/l-700mg/l, and this depends on the kind of impurity and the concentration level that will be reduced to, similarly, as required, the electric current that flows through is in the scope of every liter of about 50-650 ampere of waste water.Current density can be chosen in every square metre the electrode total area the 3-40 ampere.For finally removing nearly all impurity such as suspended solids, COD, BOD, color, toxic substance, washing composition, oil and fat, ammonia nitrogen, heavy metal etc. effectively, the hydraulic detention time of waste water in the electrolysis post is preferably big in 1 minute-10 minutes scope.From the angle of energy expenditure and wastewater treatment, interelectrode spacing is crucial, and it should be in the scope of 5mm-10cm.
When the liquid of electrolysis flows into wideer cross section from the top of post bottom is the funnel shaped storage tank time, in the bottom of action of gravity deposit, and is gone out flow liquid and brought into Filter column at storage tank with the impurity of heavy flocs unit form.On the other hand, light impurity is raised to the top with the bubble of rising, and forms one deck " scum silica frost " on the worn-out shape surface of storage tank.Floating scoriform fluid is drained with some " flocs unit ", it is found that when blue green " scum silica frost " and " flocs unit " that will be collected in column top and storage tank bottom mixes with raw waste water, demonstrate significant purifying property, the chances are for this because characterization of adsorption and the cause that wherein also has unreacted metal oxyhydroxide.
Waste water electrolysis, that flocculated of storage tank bottom is flowed in another plastic column that contains the polypropylene filter bag.Waste water passes filter bag and flows through the impurity of having removed all flocculations, and impurity is deposited on the internal surface of sack with the form of filter cake.Subsequently, transparent, purified, the watery flow liquid that goes out flows out from the bottom of Filter column.
As mentioned above, can constitute fluidized-bed by granular gac, the result is owing to the physical-chemical adsorption, and dissolved impurity can be adsorbed on activated carbon surface, can reach treatment effect effectively.Because waste water except the experience fluidized bed processing, also will experience improved electrolysis treatment simultaneously, and the turbulivity of waste water improves, the result has increased the area on dispersivity, mass transfer and the interface in addition.Yet, to purify liquid waste if only use with the gac of " fixed bed " form, it will be subjected to following restriction
ⅰ) owing to be that the fixed bed interfacial area is little;
ⅱ) under state of saturation, the impurity level of the charcoal absorption of unit weight will lack;
ⅲ) high pressure drop that causes of bed obstruction/obstruction and active-carbon bed underutilization;
ⅳ) saturated back activated carbon surface is not reproduced, so the exhausted gac can not be reused; It has to go out of use, and this makes this method very expensive.
Discovery combines fluidized-bed and improved electrolytic process with " DAF ", can remedy these limitation, because:
Because rheomorphism has increased the area on turbulivity and the interface, wherein upwards mobile gas and liquid make activated carbon granule keep continuous vortex motion;
Oxygenizement that is adsorbed impurity and the reductive action that produces by oxygen/ozone and electrolysis respectively; Because activated carbon granule vortex motion constantly, bed obstruction/obstruction can not occur.
Its result, the use gac can obtain higher cost benefit, stronger versatility reaches higher efficient.
According to the following description that proposes with by way of example with reference to accompanying drawing, can understand feature of the present invention better, wherein:
What Fig. 1 represented is the synoptic diagram of realizing an embodiment of the inventive method, and this method is followed filtration procedure after electrolytic process;
Fig. 2 represents is the synoptic diagram of realizing another embodiment of the inventive method, and this method comprises improved electrolytic process, and oxidising process (by oxygen or pass through ozone) and dissolved air floatation process;
What Fig. 3 represented is the synoptic diagram of realizing another embodiment of the inventive method, and this method comprises improves electrolytic process and fluid process (perhaps adopt activated carbon granule, perhaps adopt the ceramic/glass particle);
What Fig. 4 represented is the synoptic diagram of another embodiment of the inventive method, this method comprises and fluidized-bed (perhaps adopts activated carbon granule, perhaps adopt the ceramic/glass particle) the improved electrolytic process that combines, and in pending water, spray into the gasiform oxygen/ozone.
In all these accompanying drawings, what digital 1-9 represented is the same parts that generally adopts among the above-mentioned figure.
As shown in Figure 1, waste water is introduced by inlet 1, this inlet 1 is arranged on the bottom of electrolysis post 2, the electrolysis post is made of plastics, and as polyethylene, this post 2 has a bottom at the top be funnel shaped storage tank 3, it also be by plastics for example polyethylene make, there are 4, one dischargings of outlet of water after the purification to be collected in the outlet 5 of scum silica frost in the storage tank 3 and an outlet 6 that is used to handle back water overflow on the storage tank 3.Also have two combined electrodes that are immersed in wherein in this post 2, wherein anode 7 is made of the mixture of iron and aluminium, and negative electrode 8 is made of iron separately., given under the situation of electrifying electrodes by 9 expressions by direct supply, the waste water that the bottom by post 2 feeds upwards flows, and experiences the electrochemical reaction that is caused by electrolytic process simultaneously.As mentioned above, impurity is separated by electrochemical reaction, be deposited on the bottom of storage tank 3, at any time drain by exporting 5, and the water that purifies through this step enters another by the plastics post 10 made of polyethylene for example by exporting 4, the plastics filter bag of making just like polypropylene in this post 11, so that after water passes above-mentioned filtration medium, the water after the limpid purification can be discharged by the outlet 12 that is arranged on above-mentioned Filter column 10 bottoms.
As shown in Figure 2, waste water is introduced in the electrolysis post 2 by the inlet 1 that is arranged on electrolysis post 2 bottoms, this electrolysis post 2 by plastics for example polyethylene make, it has a bottom at the top be funnel shaped by the plastics storage tank 3 made of polyethylene for example, the outlet 4 of water after the purification is arranged on the storage tank 3, a discharging is collected in the outlet 5 of scum silica frost in the storage tank 3, and the outlet 6 of the water overflow after processing.Submergence has two compound electrodes in this post 2, wherein anode 7 is made of the mixture of iron and aluminium, and negative electrode 8 is made of iron separately, direct supply is by 9 expressions, giving under the situation of electrifying electrodes, the waste water that the bottom by post 2 feeds upwards flows and experiences the electrochemical reaction that is caused by electrolytic process simultaneously.Comprise liquid oxygen, oxygen under certain pressure from basin 10A(or ozone under the pressure of 35-45Psig from ozonizer 10A etc.) feed the posts by post 2 funnel shaped bottom 11A.Waste water has just experienced the synergy that electrochemical reaction, oxidation and dissolved air flotation combine like this, as mentioned above.
As previously mentioned, the impurity of separating by this combination treatment is deposited on the bottom of storage tank 3, and drain at any time by exporting 5, and the water after purifying through this step passes outlet 4 and enters another by the plastics post 12A that makes of polyethylene (as in specific embodiments as shown in the figure) for example, be provided with the plastics filter bag 13A that polypropylene is for example made in the inside of this post 12A, so that after water passes above-mentioned filtration medium, the water discharge of outlet 14A that can be by being arranged on above-mentioned Filter column 12A bottom after with limpid purification.
As shown in Figure 3, waste water is introduced in the electrolysis post 2 by the inlet 1 that is arranged on electrolysis post 2 bottoms, this post 2 by plastics for example polyethylene make, it has a bottom at the top be the funnel shaped storage tank of being made by plastics such as polyethylene 3, the outlet 4 of water after the purification is arranged on this storage tank 3, a discharging is collected in the outlet 5 of scum silica frost in the storage tank 3, and the outlet 6 of water overflow after processing.Two combined electrodes that are immersed in are wherein arranged in this post 2, wherein anode 7 is made of the mixture of iron and aluminium, negative electrode 8 then is made of iron separately, direct supply is by 9 expressions, giving under the situation of electrifying electrodes, pass the waste water of introducing post 2 bottoms and upwards flow, experience the electrochemical reaction that causes by electrolytic process simultaneously.The particle (the perhaps ceramic/glass pearl of particle form) (representing) that also has the gac that mixes with pending waste water in the post 2 by 10B.As mentioned above, this will produce the synergy that electrochemical reaction and fluidized-bed combine, and impurity can be separated from waste water effectively.Be deposited on the bottom of storage tank 3 by electrochemical reaction and the isolated impurity of rheomorphism combined action, and by outlet 5 discharge at any time, and through the water after so purifying preferably by exporting 4(shown in given embodiment) enter the post 11B that another is made by plastics such as polyethylene, in this post 11B, be provided with the plastics filter bag 12B that makes as polypropylene, after water passes above-mentioned filtration medium, the water discharge of the outlet 13B by being arranged on above-mentioned Filter column 11B bottom after with limpid purification.
As shown in Figure 4, waste water is introduced in the electrolysis post 2 by the inlet 1 that is arranged on electrolysis post 2 bottoms, this post 2 by plastics for example polyethylene make, it has a bottom at the top be the funnel shaped storage tank of being made by plastics such as polyethylene 3, the outlet 4 of water after the purification is arranged on this storage tank 3, a discharging is collected in the outlet 5 of scum silica frost in the storage tank 3, and an outlet 6 that allows to handle back water overflow.Go back submergence in this post 2 two combined electrodes are arranged, wherein anode 7 is made up of the mixture of iron and aluminium, negative electrode 8 then is made up of iron separately, direct supply is by 9 expressions, giving under the situation of electrifying electrodes, pass the waste water of introducing post 2 bottoms and upwards flow, experience the electrochemical reaction that causes by electrolytic process simultaneously, the activated carbon granule (or ceramic/glass globule of particle form) (being represented by 10C) that mixes with pending waste water is arranged in post 2.Under certain pressure, the bottom 12C that passes post 2 from source of the gas 11C feeds the gasiform oxygen/ozone, so that make the activated carbon granule (or ceramic/glass bead of particle form) that mixes with pending waste water no longer be maintained fixed bed simultaneously.As mentioned above, this will produce the synergy that electrochemical reaction, rheomorphism, oxidation and dissolved air flotation combine, and impurity can be separated from waste water effectively.The impurity of separating by combination treatment is deposited on the bottom of storage tank 3 as mentioned above, and by outlet 5 discharge at any time, and through the water after so purifying preferably by exporting 4(as shown among the embodiment shown in 15) enter among another post 12C that makes by plastics such as polyethylene, in post 12C, there is not the plastics filter bag 13C that makes as polypropylene, after water passes above-mentioned filtration medium, the water discharge of the outlet 14C by being arranged on above-mentioned Filter column 12C bottom after with limpid purification.
In these embodiment of the inventive method, no matter improved electrolytic process with or do not combine with oxidation/dissolution air flotation method, the preferred size of system and the optimum condition that adopted are as follows among these embodiment:
The height of electrolysis post (cylindrical): 21/2 '～6 '-0 "
The diameter of post: 6 '～4-1/2 '
Sacrifice sun level dosage: 50～700mg/l
The average area flow velocity of water: 0.2～1M/S
Retention time of sewage in the post: 3～15 minutes
In addition, in these embodiment of the inventive method, the improved electrolytic process that combines with bed process with or do not combine with oxidation style (by gasiform oxygen or ozone), the size of this optimum system choosing and the optimum condition that adopted are as follows among these embodiment:
A) voltage: 12～24 volts;
B) electric current: 20～300A/ kilolitre/hour depend on impurity;
C) electrode space: 1 "～3 "
D) based on the current density of electrode total surface area: 0.5～65MA/cm
2;
E) sacrificial anode dosage: 20～250mg/l waste water
F) column diameter: 6 "～5 '-0 ";
G) post height: 21/2 '～5 ';
H) particle diameter of activated carbon granule: 3～8mm;
I) degree of depth of fluidized-bed: 50～70% post height;
J) the average area flow velocity of waste water: 0.15～0.5M/S in the post;
K) hydraulic detention time in the post: 0.25～420S;
L) quantity of solid particulate (activated carbon granule) in the waste water of per unit weight: 20～85gms/100gm waste water
During the performance of different embodiments of the invention relatively is listed in the table below.
Should be understood that in aforesaid scope it is possible that various changes are made in the enforcement of the inventive method, they are all in the scope of appended in the back claim.
Claims (26)
1, a kind ofly purify liquid waste and make its round-robin method of wastewater treatment, this method comprises that making pending waste water pass a post that is made of plastics upwards flows, be provided with in this post and be immersed in combined electrode in the water, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, this post has a bottom at its top be funnel shaped storage tank made of plastic, giving under the situation of above-mentioned electrifying electrodes, upwards mobile waste water experiences electrochemical reaction, impurity in the waste water is separated, and drain from the top of post, then the water that purifies through this step is filtered, make it pass through a filtration medium, selectively, if desired like this, in the wastewater electrolytic process, pass post and upwards spray submicroscopic air bubble, in order in the process of handling, upwards to carry the suspended solids in the pending waste water, so that it is discharged by the outlet that is arranged on the column top.
2, a kind of method of wastewater treatment of purifying liquid waste, this method comprises that making pending waste water pass a post that is made of plastics upwards flows, be provided with the combined electrode that is immersed in the water in this post, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, this post has a bottom at its top be funnel shaped storage tank made of plastic, under predetermined pressure, to water, feed gasiform oxygen from the bottom of post, oxygen bubble passes waste water and upwards flows, giving under the situation of electrifying electrodes, waste water stands electrochemical reaction, thus, make waste water stand electrochemistry, the synergy that combines is handled in oxidation and dissolved air flotation, the impurity of from waste water, separating by this combination treatment, the bottom that is deposited on the top that is arranged on post be in the funnel shaped storage tank after, discharge from the top of post, and the water after the purification is discharged from the top of above-mentioned storage tank.
3, a kind of method of wastewater treatment of purifying liquid waste, this method comprises that making pending waste water pass a post that is made of plastics upwards flows, be provided with the combined electrode that is immersed in the water in this post, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, a bottom is arranged at the top of this post is funnel shaped storage tank made of plastic, under predetermined pressure, to water, feed gasiform ozone from the bottom of post, making ozone bubbles pass waste water upwards flows, giving under the situation of electrifying electrodes, waste water stands electrochemical reaction, thus, waste water stands electrochemistry, the synergy that combines is handled in oxidation and dissolved air flotation, because this combination treatment, it is in the funnel shaped storage tank that the impurity of separating from waste water is deposited on the bottom that is arranged on the column top, afterwards from the top venting of post, and the water after the purification is discharged from the top of above-mentioned storage tank.
4, a kind of method of wastewater treatment of purifying liquid waste, this method comprises that making pending waste water pass a post that is made of plastics upwards flows, be provided with the combined electrode that is immersed in the water in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, a bottom is arranged at the top of this post is funnel shaped storage tank made of plastic, so that giving under the situation of above-mentioned electrifying electrodes, upwards mobile waste water stands electrochemical reaction, in above-mentioned post, in pending waste water, also has the gac that exists with particle form, giving under the situation of above-mentioned electrifying electrodes thus, waste water just stands electrochemical treatment, and by a gac fluidized bed processing that forms, the bottom is separated and deposited to the impurity in the waste water in the funnel shaped storage tank, is discharged from by outlet.
5, a kind of method of wastewater treatment of purifying liquid waste, this method comprises that making pending waste water pass a post that is made of plastics upwards flows, be provided with the combined electrode that is immersed in the water in this post, the anode of above-mentioned electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, a bottom is arranged at the top of this post is funnel shaped storage tank made of plastic, giving under the situation of above-mentioned electrifying electrodes, upwards mobile waste water stands electrochemical reaction, in above-mentioned post, further comprise the ceramic/glass particle that mixes with pending waste water, giving under the situation of above-mentioned electrifying electrodes, waste water just stands electrochemical treatment and by the granuloplastic fluidized bed processing of ceramic/glass, the bottom is separated and deposited to impurity in the waste water in the funnel shaped storage tank, discharges by outlet.
6, a kind of method of wastewater treatment of purifying liquid waste, this method comprises that making pending waste water pass a post that is made of plastics upwards flows, be provided with the combined electrode that is immersed in the water in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, a bottom is arranged at the top of this post is funnel shaped storage tank made of plastic, so that giving under the situation of above-mentioned electrifying electrodes, upwards mobile waste water stands electrochemical reaction, above-mentioned post also further comprises the gac that is present in the particle form in the pending waste water, thus, giving under the situation of above-mentioned electrifying electrodes, the fluidized bed processing that waste water just experiences electrochemical treatment and is made up of active particle is under predetermined pressure, from the bottom feeding gasiform oxygen/ozone of post, the waste water experience is by electrochemistry thus, oxidation, the synergy that fluidized-bed and dissolved air flotation combine, impurity is separated from waste water, and is deposited on the bottom in the funnel shaped storage tank, discharges by outlet.
7, a kind of method of wastewater treatment of purifying liquid waste, this method comprises that making pending waste water pass a post that is made of plastics upwards flows, be provided with the combined electrode that is immersed in the water in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, a bottom is arranged at the top of this post is funnel shaped storage tank made of plastic, so that giving under the situation of above-mentioned electrifying electrodes, upwards mobile waste water stands electrochemical reaction, above-mentioned post also further comprises the glass/ceramic particle that pending waste water mixes, giving under the situation of electrifying electrodes, waste water experience electrochemical treatment and the fluidized bed processing that constitutes by the glass/ceramic particle, under predetermined pressure, introduce the gasiform oxygen/ozone from the bottom of pillar, thus waste water experience electrochemistry, oxidation, the synergy that fluidisation and dissolved air flotation combine is separated impurity from waste water, and be deposited on the bottom in the funnel shaped storage tank, discharge by its outlet.
8, as the described method of arbitrary claim among the claim 2-7, it is characterized in that making water to flow through a filtration medium through after so purifying, this filtration medium constitutes by comprising the post polypropylene filter bag and that made by plastics such as polyethylene.
9, as claim 4 or 5 described methods, it is characterized in that the submicroscopic air bubble that upwards sprays into passes post, the suspended solids that carries in the pending waste water upwards floats, so that from the outlet that is arranged on the column top it is discharged.
10, method as claimed in claim 3 is characterized in that feeding ozone under the pressure of 35～45Psig, and it is by increasing the effect of scavenging process to the oxidation of some impurity and " DAF " phenomenon of passing through to be produced.
11,, it is characterized in that realizing that the condition that these methods adopt is as follows as the described method of arbitrary claim among the claim 1-3:
The height of electrolysis post (garden cylindricality): 21/2 '～6 '-0 "
The diameter of post: 6 '～4-1/2 '
Sacrifice sun level dosage: 50～700mg/l
The equal area flow velocity of level: 0.2～1M/sec
Retention time of sewage in the post: 3～15 minutes
12, method as claimed in claim 11, it is characterized in that interelectrode electric current is in the scope of 50～650A/ kilolitre waste water, current density be selected in 3～40 the peace/square metre the electrode total surface area, interelectrode distance is in the scope of 5mm～10cm, above-mentioned parameter can be selected as required.
13, as the described method of arbitrary claim in the claim 4～7, it is as follows to it is characterized in that implementing the condition that this method adopts:
A) voltage: 12～24 volts;
B) electric current: 20～300A/ kilolitre/hour depend on impurity;
C) electrode space: 1 "～3 "
D) based on the current density of electrode total surface area: 0.5～65MA/cm
2;
E) sacrificial anode dosage: 20～250mg/l waste water;
F) column diameter: 6 "～5 '-0 ";
G) post height: 21/2 '～5 ',
H) particle diameter of activated carbon granule: 3～8mm;
I) degree of depth of fluidized-bed: 50～70% post height;
J) the average area flow velocity of waste water: 0.15～0.5M/S in the post;
K) hydraulic detention time in the post: 0.25～420S;
L) quantity of solid particulate (activated carbon granule) in the waste water of per unit weight: 20～85gms/100gm waste water
14, a kind of sewage treatment equipment of purifying liquid waste, this equipment comprises a post of being made by plastics or other any electrically nonconducting material, one combined electrode that is immersed in the water is arranged in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, negative electrode then is made of iron separately, it is funnel shaped storage tank that the top of above-mentioned post is provided with a bottom, this storage tank is made with plastics or other any non electrically conductive materials, giving under the situation of electrifying electrodes, the upwards mobile waste water that passes the import feeding that the column bottom is set just experiences electrochemical reaction, this bottom is that funnel shaped storage tank has the outlet in order to drain impurity and to be collected at the scum silica frost in the storage tank, the outlet of institute's treating water overflow, and process outlet of purifying waste water after so handling, this treated water outlet is connected with a filtration medium, the bottom of above-mentioned post selectively is provided with one in order to spray into the device of submicroscopic air bubble, in the wastewater electrolytic process, make air bubble pass post and upwards flow.
15, a kind of sewage treatment equipment of purifying liquid waste, this equipment comprises a post of being made by plastics or other any electrically nonconducting material, the combined electrode that is immersed in the water is arranged in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, it is the funnel shaped storage tank made from plastics or other any electrically nonconducting material that the top of above-mentioned post is provided with a bottom, giving under the situation of above-mentioned electrifying electrodes, make the upwards mobile waste water experience electrochemical reaction of passing the import feeding that is located at the column bottom, this bottom has the outlet of draining impurity and pinching scum silica frost in storage tank for funnel shaped storage tank, the outlet of the overflow of institute's treating water, and outlet that is used for through processing after water like this, and comprise a source of oxygen, in the wastewater electrolytic process under predetermined pressure, this source of oxygen feeds gasiform oxygen from the bottom of post to waste water, make oxygen bubble pass waste water and upwards flow.
16, a kind of sewage treatment equipment of purifying liquid waste, this equipment comprises a post of being made by plastics or other any electrically nonconducting material, the combined electrode that is immersed in the water is arranged in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, it is the funnel shaped storage tank made from plastics or other any electrically nonconducting material that the top of above-mentioned post is provided with a bottom, giving under the situation of above-mentioned electrifying electrodes, pass the upwards mobile waste water experience electrochemical reaction of the import feeding that is located at the column bottom, this bottom has the outlet of draining impurity and pinching scum silica frost in storage tank for funnel shaped storage tank, the outlet of the overflow of institute's treating water, with an outlet that is used for through processing after water like this, and comprise an ozone source, in the wastewater electrolytic process, under predetermined pressure, this ozone source feeds gasiform ozone from the bottom of post to waste water, make ozone fill bubble and pass waste water and upwards flow.
17, a kind of sewage treatment equipment of purifying liquid waste, this equipment comprises a post of being made by plastics or other any electrically nonconducting material, the combined electrode that is immersed in the water is arranged in this post, this electric anode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, it is the funnel shaped storage tank made from plastics or other any electrically nonconducting material that the top of above-mentioned post is provided with a bottom, giving under the situation of above-mentioned electrifying electrodes, pass the upwards mobile waste water experience electrochemical reaction of the import feeding that is located at the column bottom, this bottom has the outlet of draining impurity and the scum silica frost of pinching in storage tank for funnel shaped storage tank, the outlet of the overflow of institute's treating water, and outlet that is used for through processing after water like this, in above-mentioned post, in pending waste water, also has the gac that exists with particle form, giving under the situation of above-mentioned electrifying electrodes thus, the fluidized bed processing that waste water just stands electrochemical treatment and formed by activated carbon granule, make the impurity in the waste water separate and deposit to the bottom, discharge by outlet in the funnel shaped storage tank.
18, a kind of sewage treatment equipment of purifying liquid waste, this equipment comprises a post of being made by plastics or other any electrically nonconducting material, the combined electrode that is immersed in the water is arranged in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, it is the funnel shaped storage tank made from plastics or other any electrically nonconducting material that the top of above-mentioned post is provided with a bottom, giving under the situation of above-mentioned electrifying electrodes, pass the upwards mobile waste water experience electrochemical reaction of the import feeding that is located at the column bottom, this bottom has the outlet of draining impurity and the scum silica frost of pinching in storage tank for funnel shaped storage tank, the overflow outlet of institute's treating water, and outlet that is used for through processing after water like this, in above-mentioned post, in pending waste water, also has the ceramic/glass particle, giving under the situation of above-mentioned electrifying electrodes thus, waste water just stands electrochemical treatment and by the granuloplastic fluidized bed processing of ceramic/glass, impurity in the waste water is separated, and be deposited on the bottom in the funnel shaped storage tank, discharge by outlet.
19, a kind of sewage treatment equipment of purifying liquid waste, this equipment comprises a post of being made by plastics or other any electrically nonconducting material, the combined electrode that is immersed in the water is arranged in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, it is the funnel shaped storage tank made from plastics or other any electrically nonconducting material that the top of above-mentioned post is provided with a bottom, giving under the situation of above-mentioned electrifying electrodes, pass the upwards mobile waste water experience electrochemical reaction of the import feeding that is located at the column bottom, this bottom has the outlet of draining impurity and pinching scum silica frost in storage tank for funnel shaped storage tank, institute's treating water overflow head piece, and outlet that is used for through processing after water like this, in above-mentioned post, in pending waste water, also has the gac that exists with particle form, this equipment also comprises a gaseous state oxygen/ozone source, under predetermined pressure, this gaseous state oxygen/ozone source feeds the gasiform oxygen/ozone from the bottom of post to waste water, make waste water experience electrochemistry thus, oxidation, the synergy that combines is handled in fluidisation and dissolved air flotation, impurity is separated from waste water, and be deposited on the bottom in the funnel shaped storage tank, drain by its outlet.
20, a kind of sewage treatment equipment of purifying liquid waste, this equipment comprises a post of being made by plastics or other any electrically nonconducting material, the compound rain utmost point that is immersed in the water is arranged in this post, the anode of this electrode is made of the mixture of iron and aluminium, negative electrode then is made of iron separately, it is the funnel shaped storage tank made from plastics or other any electrically nonconducting material that the top of above-mentioned post is provided with a bottom, giving under the situation of above-mentioned electrifying electrodes, pass the waste water waste water experience electrochemical reaction that upwards flows of the import feeding that is located at the column bottom, this bottom has the outlet of draining impurity and pinching scum silica frost in storage tank for funnel shaped storage tank, the overflow outlet of institute's treating water, and outlet that is used for through processing after water like this, in above-mentioned post, in pending waste water, also has the ceramic/glass particle that exists with particle form, this equipment also comprises a gaseous state oxygen/ozone source, under predetermined pressure, this gaseous state oxygen/ozone source feeds the gasiform oxygen/ozone from the bottom of post to waste water, make waste water experience electrochemistry thus, oxidation, the synergy that combines is handled in fluidisation and dissolved air flotation, impurity is separated from waste water, and be deposited on the bottom in the funnel shaped storage tank, drain by its outlet.
21,, it is characterized in that the outlet of water is connected on the filtration medium after the purification of post as the described equipment of arbitrary claim in the claim 15～20.
22, equipment as claimed in claim 21 is characterized in that this filtration medium is made of the post that contains the polypropylene filter bag and make with plastics such as polyethylene.
23, as the described equipment of arbitrary claim in the claim 14～16, it is characterized in that adopting following parameters:
Electrolysis post height (cylindrical): 21/2 '～6 '-0 "
Column diameter: 6 "～4-1/2 '
24, as the described equipment of arbitrary claim in the claim 17～20, it is characterized in that adopting following parameters:
A) interelectrode distance: 1 "～3 ";
B) column diameter: 6 "～5 '-0 ";
C) post height: 21/2 '～5 ',
25, a kind of method of wastewater treatment of purifying liquid waste is substantially as described with reference to accompanying drawing.
26, a kind of sewage treatment equipment of purifying liquid waste, substantially as with reference to the accompanying drawing description with illustrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94103287 CN1107443A (en) | 1994-02-26 | 1994-02-26 | Effluent treatment involving iono-oxidation treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94103287 CN1107443A (en) | 1994-02-26 | 1994-02-26 | Effluent treatment involving iono-oxidation treatment |
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| CN1107443A true CN1107443A (en) | 1995-08-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612578A (en) * | 2009-08-14 | 2012-07-25 | 汉努·索米宁 | Method for dewatering a fiber and particle suspension in the manufacture of pulp, paper or board |
| CN104302582A (en) * | 2012-04-18 | 2015-01-21 | 埃克森美孚上游研究公司 | Removing carbon nanotubes from a water system |
| CN104671361A (en) * | 2015-02-11 | 2015-06-03 | 清华大学 | Method for removing PPCPs micropollutants in secondary sedimentation tank wastewater |
| CN108423893A (en) * | 2018-03-20 | 2018-08-21 | 武汉轻工大学 | Secondary effluent of municipal sewage plant regeneration treatment system and its secondary effluent regeneration treating method |
-
1994
- 1994-02-26 CN CN 94103287 patent/CN1107443A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612578A (en) * | 2009-08-14 | 2012-07-25 | 汉努·索米宁 | Method for dewatering a fiber and particle suspension in the manufacture of pulp, paper or board |
| CN102612578B (en) * | 2009-08-14 | 2014-12-31 | 汉努·索米宁 | Method for dewatering a fiber and particle suspension in the manufacture of pulp, paper or board |
| CN104302582A (en) * | 2012-04-18 | 2015-01-21 | 埃克森美孚上游研究公司 | Removing carbon nanotubes from a water system |
| US9975793B2 (en) | 2012-04-18 | 2018-05-22 | Exxonmobil Upstream Research Company | Removing carbon nanotubes from a water system |
| CN104671361A (en) * | 2015-02-11 | 2015-06-03 | 清华大学 | Method for removing PPCPs micropollutants in secondary sedimentation tank wastewater |
| CN104671361B (en) * | 2015-02-11 | 2017-05-24 | 清华大学 | Method for removing PPCPs micropollutants in secondary sedimentation tank wastewater |
| CN108423893A (en) * | 2018-03-20 | 2018-08-21 | 武汉轻工大学 | Secondary effluent of municipal sewage plant regeneration treatment system and its secondary effluent regeneration treating method |
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