CN203373214U - Discharge water treatment device - Google Patents
Discharge water treatment device Download PDFInfo
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- CN203373214U CN203373214U CN201320435538.6U CN201320435538U CN203373214U CN 203373214 U CN203373214 U CN 203373214U CN 201320435538 U CN201320435538 U CN 201320435538U CN 203373214 U CN203373214 U CN 203373214U
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Abstract
The utility model discloses a treatment device (1 or 2) for the discharge water containing suspended solids (SS) from a polymer, which is used for obtaining the treated discharge water with few SS and generating recyclable SS, and comprises a floating separation tank (11), a floating separation tank (12), a dryer (13) and a sand filter (14), wherein the floating separation tank (11) is used for performing floating separation on the SS in the discharge water; the floating separation tank (12) is used for performing floating separation on the SS separated in the floating separation tank (11); the dryer (13) is used for performing vacuum drying on the SS separated in the floating separation tank; the sand filter (14) is used for filtering the treated water obtained by the floating separation tank (11).
Description
Technical field
The utility model relates to drainage processing method and drain treatment apparatus, specifically relates to the treatment process and the treatment unit that contain from the draining of the suspended solid of polymkeric substance.
Background technology
A large amount of a lot of situations of draining of discharging while producing polymkeric substance SS(suspended solid of autohemagglutination compound that gets off in chemical plant) many, oxygen required amount that COD(is chemical) and the biochemical oxygen required amount of BOD() height.When such draining is discharged on non-processor ground, inestimable on the impact of surrounding enviroment.Therefore, developed various drainage processing methods.Such as put down in writing following content in patent documentation 1: the draining of the organic substance that contains synthetic resins etc. above separates and is processed by common cohesion is floating.In addition, put down in writing the treatment process of the waste water that comprises following operation in patent documentation 1: add nitrogenous compound and polyacrylamide based polymer in the draining that is containing resin, make it form condensation product, make its separation.
Patent documentation 1: TOHKEMY 2000-84568 communique (on March 28th, 2000 is open).
The utility model content
Utility model problem to be solved
The draining that SS is many is large on the impact of environment, so expect to have the draining less on the impact of environment, processes.
Therefore, the utility model is in view of the above problems and proposes, and its purpose is to provide a kind for the treatment of process and drain treatment apparatus of the draining that can access the processing draining considerably less from the suspended solid of polymkeric substance and raw material that can be using the suspended solid from polymkeric substance that separates as reprocessed plastic(s) and recycle.
For solving the means of problem
Drain treatment apparatus of the present utility model is in order to solve above-mentioned problem, for a kind of drain treatment apparatus that carries out the processing of draining, that when described draining is the manufacture of polymkeric substance, discharges comprises the draining from the suspended solid of polymkeric substance, be configured to and comprise: the above-mentioned suspended solid in above-mentioned draining is floated to the 1st floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 1st is reclaimed floats the 2nd floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 2nd is reclaimed carries out vacuum drying drying machine, and the 1st strainer that the processing water that separator tank obtains from the above-mentioned the 1st floats is filtered.
In addition, the mode of other of drain treatment apparatus of the present utility model is the drain treatment apparatus that carries out the processing of draining in order to solve above-mentioned problem, that when described draining is the manufacture of polymkeric substance, discharges comprises the draining from the suspended solid of polymkeric substance, be configured to and comprise: the above-mentioned suspended solid in above-mentioned draining is floated to the 1st floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 1st is reclaimed floats the 2nd floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 2nd is reclaimed carries out vacuum drying drying machine, in the processing water that separator tank floating from the above-mentioned the 1st is obtained, residual above-mentioned suspended solid carries out separator tank on Pressurized flotation that Pressurized flotation separates, the strainer that the processing water that separator tank from above-mentioned Pressurized flotation is obtained is filtered, filtrate from above-mentioned strainer is carried out to the lonely property biological treating tank of lonely property biological treatment, the aerophilons biological treating tank that the processing water obtained from above-mentioned lonely property biological treating tank is carried out to the aerophilons biological treatment, thereby and the coagulative precipitation groove that the processing water to obtaining from above-mentioned aerophilons biological treating tank is added to the condensation product precipitate and separate of flocculation agent formation.
The effect of utility model
According to drain treatment apparatus of the present utility model, can access the processing draining considerably less from the suspended solid of polymkeric substance, and can recycle by the raw material using the suspended solid from polymkeric substance of separation as reprocessed plastic(s).
The accompanying drawing explanation
Fig. 1 means the drain treatment apparatus of the 1st embodiment and the figure of the technical process that draining is processed.
Fig. 2 means the drain treatment apparatus of the 2nd embodiment and the figure of the technical process that draining is processed.
Description of reference numerals
11 ... floating upper separator tank (the 1st floating upper separator tank)
12 ... floating upper separator tank (the 2nd floating upper separator tank)
13 ... Vacuumdrier (drying machine)
14 ... sand-bed filter (the 1st strainer)
15 ... separator tank on Pressurized flotation
16 ... sand-bed filter (strainer, the 2nd strainer)
17 ... final neutralizing well (neutralizing well)
32 ... lonely property biological treating tank
33 ... the aerophilons biological treating tank
34 ... collection surface
35 ... the coagulative precipitation groove
36 ... pressure filter.
Embodiment
(embodiment 1)
One embodiment of drain treatment apparatus of the present utility model and drainage processing method is described as follows based on Fig. 1.
The schematic diagram of the technical process of the draining processing that Fig. 1 means the drain treatment apparatus 1 of present embodiment and uses drain treatment apparatus 1 to carry out.
The drain treatment apparatus 1 of present embodiment is configured to and comprises separator tank 15, sand-bed filter (the 2nd strainer) 16 and final neutralizing well (neutralizing well) 17 on floating upper separator tank (the 1st floating upper separator tank) 11, floating upper separator tank (the 2nd floating upper separator tank) 12, Vacuumdrier (drying machine) 13, sand-bed filter (the 1st strainer) 14, Pressurized flotation.
The draining 10 of using drain treatment apparatus 1 to be processed comprises the suspended solid (hereinafter referred to as SS) from polymkeric substance, is that (for example, CODcr is that 200mg/L is following, BOD in the draining that COD and BOD are lower
5below 100mg/L).Such draining is for example the polymkeric substance obtained by polyreaction have been carried out to the draining after cleaning repeatedly, has been set as removing polymerization and has started the draining of agent and chain-transfer agent etc.In addition, the polymkeric substance in this specification sheets refers to be included in the particle of water float or the polymer of the particle that swims in water.As such polymkeric substance, illustration ethylene fluoride fork is polymer and heat-expandable microsphere body (for example disclosed polymkeric substance of patent documentation WO2010/070987), but is not limited to these.Below, the flow process of the draining processing of using drain treatment apparatus 1 to carry out and each formation of drain treatment apparatus 1 are described.
(the 1st floating upper separation circuit)
At first draining 10 is sent to floating upper separator tank 11.By making draining 10 be detained in separator tank 11 on floating, make the SS from polymkeric substance that is contained in draining 10 float separation.Can use known general floating upper separator tank in the past as floating upper separator tank 11.For example can use the floating upper separator tank be provided with for the scraper plate of the floating upper dregs of scraping.In addition, floating upper separator tank 11 is without being the floating upper separator tank that possesses the compression type of the pressurized water generating unit that produces micro bubble.Residence time in floating upper separator tank 11, suitable decision got final product corresponding to the proterties of draining 10.
The floating upper SS separated is sent to floating upper separator tank 12 as SS dregs 18.On the other hand, thus having removed the limpid water that SS dregs 18 obtain (processing water) 19 from draining 10 is sent to sand-bed filter 14.
(the 2nd floating upper separation circuit)
On the 2nd floats, in separation circuit, the order SS dregs 18 that separator tank 11 is sent here from floating are detained in separator tank 12 on floating, thereby from SS dregs 18, SS are floated and separates.The floating upper SS separated is recovered as than SS dregs 18, also having concentrated the SS dregs 20 of SS.As floating upper separator tank 12, can use known general floating upper separator tank in the past, with floating upper separator tank 11, be that identical formation gets final product.Residence time in floating upper separator tank 12, suitable decision got final product corresponding to SS dregs 18.
The SS dregs 20 that reclaim are sent to Vacuumdrier 13.On the other hand, thus removing from SS dregs 18 the limpid water 21 that SS obtain is sent to separator tank 15 Pressurized flotation.
(drying process)
In drying process, SS dregs 20 vacuum-dryings that will send here from floating separator tank 12, thus generation is from the SS wet feed 28 of polymkeric substance.For the drying machine that can reduce pressure gets final product, can use known Vacuumdrier in the past as Vacuumdrier 13.Wherein preferably use the Vacuumdrier of the stirring-type of the whipping appts that has configured stirring rake etc.Time of drying and drying temperature are according to the proterties of SS dregs 20 and as the proterties of the SS wet feed of purpose and suitable decision gets final product.The SS from polymkeric substance that comprises various particle diameters in SS dregs 20.Therefore, if carry out the drying of filtering based on strainer, the mesh that easily produces strainer stops up.By using Vacuumdrier, can avoid such problem, so can generate efficiently the SS wet feed.The SS wet feed 28 obtained by this operation can be aptly as the raw material of reprocessed plastic(s) and recycle.
(the 1st filter progress)
Remove SS from draining 10 in separator tank 11 on floating, but in the limpid water 19 obtained the residual SS of having.Therefore, limpid water 19 is sent to sand-bed filter 14 and is filtered.Thus, the SS that residues in limpid water 19 is filtered material capture.Its result, obtain as filtrate the processing water 23 that SS content has reduced.That is, can access SS considerably less (for example 20mg/L is following) and process draining.
As sand-bed filter, according to kind and the formation of filtering material, single layer filter mode and multilayer (2 layers) filter type are arranged.In addition, according to the applying method of filter pressure, gravity filtration mode and filtering under pressure mode are arranged.If consider to filter the water yield and for the proterties of the limpid water 19 filtered, as sand-bed filter 14, consider the efficiency of backwashes and preferably use the gravity filtration mode of individual layer.Filtering material has multiple, and preferably combination is used sand, the gravel of two kinds of hard coal, different-grain diameter.
On the other hand, by the SS of the filtering material of sand-bed filter 14 trapping, by backwash sand-bed filter 14, be recovered.Backwash the sand-bed filter 14 and backwash water 22 that obtains is sent to separator tank 15 on Pressurized flotation.
(separation circuit on Pressurized flotation)
On Pressurized flotation, in separation circuit, make backwash water 22 be stranded in separator tank 15 on Pressurized flotation, separate thereby will be contained on the SS Pressurized flotation of backwash water 22." on Pressurized flotation, separate " on the Pressurized flotation that refers to the pressurized water generating unit with the trickle bubble of generation and float separation in separator tank at this.On Pressurized flotation, separator tank can be used in the past separator tank on known general Pressurized flotation.The following method of the general employing of pressurized water generating unit: make a part of processing water on Pressurized flotation reflux, make pressurized air be dissolved in wherein and inject separator tank on Pressurized flotation, but being not limited to this.
The SS separated on Pressurized flotation is sent to floating upper separator tank 12 as SS dregs 26.Thus, the SS separated on Pressurized flotation in separator tank 15 on Pressurized flotation in the identical enforcement circulation of this treatment process or other circulations the 2nd floating in separation circuit, be supplied to together with SS dregs 18 on floating and separate.Thus, for irretrievable SS in the 1st separation circuit, can make it be contained in the SS dregs that are supplied to the 2nd separation circuit, finally can access more SS wet feed.
On the other hand, remove from backwash water 22 the limpid water 24 obtained by the SS by separating on Pressurized flotation and be sent to sand-bed filter 16.
In addition, on Pressurized flotation in separation circuit, the 2nd limpid water 21 that separator tank 12 is sent here from floating in separation circuit on floating in the identical enforcement circulation of this treatment process or other circulations also is supplied to Pressurized flotation to be separated.Thereby, can by irretrievable SS in the 2nd separation circuit via Pressurized flotation on separation circuit and the separation in wraparound the 2nd separation circuit again.Thus, finally can access more SS wet feed.
(the 2nd filter progress)
Thereby the SS of residual certain degree the limpid water 24 obtained from backwash water 22 removal SS dregs 26 in separation circuit on Pressurized flotation.Therefore, limpid water 24 is sent to sand-bed filter 16 and is filtered.Thus, the SS that residues in limpid water 24 is trapped by the filtering material of sand-bed filter 16.Can use the sand-bed filter of the formation identical with sand-bed filter 14 as sand-bed filter 16.
The SS that is caught to combine in the filtering material of sand-bed filter 16 is recovered by backwash sand-bed filter 16.Backwash the sand-bed filter 16 and backwash water 25 that obtains is sent to separator tank 15 on Pressurized flotation again.Thus, in separation circuit, together with backwash water 22, be supplied on Pressurized flotation and separate on the Pressurized flotation of that trap by sand-bed filter 16, as to be contained in backwash water 25 SS in other the circulation of this treatment process.Its result, can by separation circuit on Pressurized flotation, do not have separated SS finally be sent to floating on separator tank 12.Thus, finally can access more SS wet feed.In addition, owing to again being supplied on Pressurized flotation and separating, so can be sent to the state concentrated floating upper separator tank 12.
The processing water 27 obtained as the filtrate of sand-bed filter 16 carrys out the processing water of backwash water 22 of the sand-bed filter 14 of self-contained SS, by via separation circuit on Pressurized flotation and the 2nd filter progress, becomes the considerably less processing draining of content of SS.Process water 27 and be sent to final neutralizing well 17 in order before discharge, to carry out neutralizing treatment.
(in and operation)
In and in operation, the processing water lacked in order to discharge via a series of operation quantitative change of SS, carry out neutralizing treatment.The final neutralizing well that carries out neutralizing treatment can be used known general neutralizing well in the past.For example, also can possess the acid supplied with for adjusting pH or the feed mechanism of alkali, also can possess for confirming the pH confirming mechanism of the pH in final neutralizing well.Acid and the alkali for neutralizing treatment, supplied with are not particularly limited, and use the bronsted lowry acids and bases bronsted lowry usually used in the neutralizing treatment of hydrochloric acid and sodium hydroxide etc. to get final product.The processing draining 29 of having carried out neutralizing treatment is disposed to outside from discharge point.Utilize above a series of operation, processing draining 29 is the considerably less processing draining of SS, so can make the impact near environment discharge point, is irreducible minimum.
In addition, the handover between the treatment trough of above-mentioned object being treated, the handover from treatment trough to strainer or the handover from strainer to treatment trough are not defined as the situation of direct handover, can be via retention basin that temporarily stores object being treated etc. and transfer yet.In retention basin, can play the amount of the object being treated of regulate transferring, a plurality of object being treateds that will send here from a plurality for the treatment of troughs and converge one effect.In addition, the transfer mechanism the handover between the treatment trough of object being treated, the handover from treatment trough to strainer and the handover from strainer to treatment trough, be not particularly limited, and the general transfer mechanism of use pump etc. gets final product.In addition, the volume of each treatment trough determines to get final product according to the amount that becomes the draining of processing object and proterties aptly.
(embodiment 2)
His embodiment of drain treatment apparatus of the present utility model and drainage processing method is described as follows based on Fig. 2.In addition, for convenience of explanation, for having, mark identical reference marks with the parts of the parts identical function used in aforesaid embodiment and the description thereof will be omitted.
The schematic diagram of the technical process of the draining processing that Fig. 2 means the drain treatment apparatus 2 of present embodiment and uses drain treatment apparatus 2 to carry out.
Drain treatment apparatus 2 in present embodiment is configured to and comprises separator tank 15, sand-bed filter 16, the property biological treating tank 32 of being sick of, aerophilons biological treating tank 33, collection surface 34, coagulative precipitation groove 35, pressure filter 36 and final neutralizing well 17 on floating upper separator tank (the 1st floating upper separator tank) 11, floating upper separator tank 12, Vacuumdrier 13, Pressurized flotation.
Using the processed draining 30 of drain treatment apparatus 2 is SS and the higher drainings (for example, CODcr is average 4300mg/L) of COD that comprise from polymkeric substance.Thereby the draining that the suspension liquid dehydration that such draining is the polymkeric substance that for example will be obtained by polyreaction obtains, be set as more containing the draining that polymerization starts agent and chain-transfer agent etc.Below, the flow process of the draining processing of using drain treatment apparatus 2 to carry out and each formation of drain treatment apparatus 2 are described.
(the 1st floating upper separation circuit)
At first draining 30 is sent to floating upper separator tank 11.By making draining 30 be detained in separator tank 11, the SS from polymkeric substance that is contained in draining 30 is floated to separation on floating.Residence time in floating upper separator tank 11 gets final product according to the suitable decision of proterties of draining 30.
The floating upper SS separated is sent to floating upper separator tank 12 as SS dregs 37.On the other hand, thus SS dregs 37 are removed to the limpid water (processing water) 40 obtained from draining 30 is sent to separator tank 15 Pressurized flotation.
(floating upper separation circuit 2)
On the 2nd floats, in separation circuit, the order SS dregs 37 that separator tank 11 is sent here from floating are detained in separator tank 12 on floating, thereby from SS dregs 37, SS are floated and separates.The SS separated on floating is recovered as than SS dregs 37, having concentrated the SS dregs 38 of SS.Residence time in floating upper separator tank 12, suitable decision got final product corresponding to the proterties of SS dregs 37.
The SS dregs 38 that reclaimed are sent to Vacuumdrier 13.On the other hand, thus removing from SS dregs 37 the limpid water 41 that SS obtain is sent to separator tank 15 Pressurized flotation.
(drying process)
In drying process, SS dregs 38 vacuum-dryings that will send here from floating separator tank 12, thus generation is from the SS wet feed 39 of polymkeric substance.The SS wet feed 39 obtained in this operation can be as the raw material of reprocessed plastic(s) and recycling aptly.
(separation circuit on Pressurized flotation)
On Pressurized flotation, in separation circuit, the order limpid water 40 that separator tank 11 is sent here from floating is detained in separator tank 15 on Pressurized flotation, thereby the SS that residues in limpid water 40 is carried out separating on Pressurized flotation.The SS separated on Pressurized flotation is sent to floating upper separator tank 12 as SS dregs 42.Thus, the SS separated on Pressurized flotation in separator tank 15 on Pressurized flotation in the identical enforcement circulation of this treatment process or other circulations the 2nd floating in separation circuit, be supplied to together with SS dregs 37 on floating and separate.Thus, for the SS that could not reclaim in the 1st separation circuit, also can make it be contained in the SS dregs that are supplied to the 2nd separation circuit, finally can access more SS wet feed.
On the other hand, thus the limpid water 43 that the floating upper SS separated is obtained from limpid water 40 removals is sent to sand-bed filter 16.
In addition, on Pressurized flotation in separation circuit, in the identical enforcement circulation of this treatment process or other circulations the 2nd floating in separation circuit, the limpid water 41 that separator tank 12 is sent here from floating also is supplied to Pressurized flotation to be separated.Thereby, the SS that could not reclaim can be rapped around to again to the separation in the 2nd separation circuit in the 2nd separation circuit.Thus, finally can access more SS wet feed.
(filter progress)
Thereby removed the residual SS of certain degree the limpid water 43 that SS obtains from limpid water 40 in separation circuit on Pressurized flotation.Therefore, limpid water 43 is sent to sand-bed filter 16 and is filtered.Thus, the SS that residues in limpid water 43 is caught to combine in the filtering material of sand-bed filter 16.Its result, can access as filtrate the processing water 45 that SS content has reduced.Process water 45 and be sent to lonely property biological treating tank 32.
The SS that is caught to combine in the filtering material of sand-bed filter 16 is recovered by backwash sand-bed filter 16.Backwash the sand-bed filter 16 and backwash water 44 that obtains is sent to separator tank 15 on Pressurized flotation again.Thus, in separation circuit, together with limpid water 40, be supplied on Pressurized flotation and separate on the Pressurized flotation in other the enforcement circulation of that trap by sand-bed filter 16, as to be contained in backwash water 44 SS in this treatment process.Its result, can will not have separated SS finally to be sent to floating upper separator tank 12 in separation circuit on Pressurized flotation once.Thus, finally can access more SS wet feed.In addition, owing to again being supplied on Pressurized flotation and separating, so can be sent to the state concentrated floating upper separator tank 12.
(the property biologic treatment process of being sick of)
The processing water 45 of sending here from sand-bed filter 16, lonely property biological treating tank 32, is supplied to lonely biological treatment.The property biological treating tank 32 of being sick of is the treatment troughs of being carried out a biological disposal upon for property ground that draining is sick of, so long as the treatment trough of organic decomposition efficiency excellence gets final product, can use the treatment trough of known lonely property biological treatment mode in the past.As lonely property biological treating tank 32, can be 1 slot type that sour formation reaction and biogas formation reaction are carried out in same groove, can be also 2 laminars that each reaction is carried out in minute other groove.In addition, be sick of property biological treating tank 32 for the mode of swimming and Sludge Bed mode etc. arbitrarily mode can, in addition, be to hold the body addition type and granulation mud type can.Residence time in lonely property biological treating tank 32 gets final product corresponding to the suitable decision of proterties of processing water 45.
The processing water 46 obtained processing water 45 to carry out the biological treatment of lonely property is sent to aerophilons biological treating tank 33.
In addition, the biogas of the methane gas produced in the property biologic treatment process of being sick of etc. is disposed to atmosphere carry out in the past known gas processing via thionizer etc. after.
(aerophilons biologic treatment process)
The processing water 46 of sending here from the property biological treating tank 32 of being sick of, aerophilons biological treating tank 33, is supplied to the biological treatment that needs gas.Aerophilons biological treating tank 33 is the treatment troughs for being carried out a biological disposal upon in draining aerophilons ground, so long as the treatment trough of organic decomposition efficiency excellence gets final product, can use the treatment trough of known aerophilons biological treatment mode in the past.As aerophilons biological treating tank 33, such as adopting, active sludge is remained on to the mode of swimming in groove or makes active sludge be attached to microbial film mode that holds body and kept etc. with floating state.As the aerophilons biological treating tank 33 of microorganism property under aerophilons state ground decomposing organic matter, can use be provided with in groove for the aerator tank of the oxygen feed mechanism of the diffuser of oxygen supply (air) and aerator etc.Aerophilons biological treating tank 33 can be that 1 slot type can be also multi-channel, in addition, during 1 slot type, also partition wall can be set in groove.Residence time in aerophilons biological treating tank 33 gets final product corresponding to the suitable decision of proterties of processing water 46.
The processing water 47 obtained processing water 46 to carry out the aerophilons biological treatment is sent to collection surface 34.
(precipitate and separate operation)
Processing water 47 after the aerophilons biological treatment is in order to remove from biological SS, macromolecule organic matter and phosphorus and by agglomeration process.In the agglomeration process of the processing water 47 after the aerophilons biological treatment, use known collection surface 34 in the past.This collection surface 34 can be also only 1 groove, more than also can 2 grooves being set multistagely.
The slow steel basin that collection surface generally comprises the steel basin rapidly for making flocculation agent contact fully with processed water and makes agglomerates grow up.Thereby, by the collection surface more than 2 grooves multistage while arranging, the collection surface that preferably makes leading portion for steel basin rapidly, to make the collection surface of back segment be slow steel basin.
As flocculation agent, as long as have the effect of the turbid matter in trapping, agglomeration process water 47, not limited especially, is flocculation agent such as the inorganic system that can use polymerize aluminum chloride (PAC), Tai-Ace S 150, iron(ic) chloride, ferric sulfate and ferric-polysilicate (PSI) etc. or the organic polymer of inorganic macromolecular flocculation agent or polyacrylamide etc.
In addition, in order to remove phosphorus, the phosphorus remover of interpolation calcium chloride etc.
Add according to necessity the pH that the pH adjusting agent is adjusted into the flocculation agent that is suitable for use during agglomeration process.
The processing water 48 that has carried out cohesion then is sent to coagulative precipitation groove 35.In coagulative precipitation groove 35, agglomerates precipitation and be separated into processing water 49 and the cohesion mud 50 as the top defecation.Coagulative precipitation groove 35 can be used known coagulative precipitation groove in the past, for example, can use cross-flow type settling bath and centre-driven formula settling bath etc.
(dehydration procedure)
In dehydration procedure, the cohesion mud 50 of the coagulative precipitation thing as obtaining in the precipitate and separate operation is carried out to processed, generate the dewatered sludge that water ratio has reduced.In the present embodiment, use pressure filter 36 to carry out processed, as long as but can carry out processed and at this, be not limited to pressure filter.For example, also can use belt press etc. other the adding pressure type water extracter or the dewatering unit of the machinery of centrifuge etc.The cohesion mud 50 that is sent to pressure filter 36 is dehydrated so that water ratio becomes 40～50%.The dewatered sludge 52 obtained by dehydration is transported to outside, is landfilled processing.
(in and operation)
In and in operation, in order to discharge by a series of operation, the quantitative change of SS is few, BODcr and COD
5the processing water that diminishes of value, carry out neutralizing treatment.The processing draining 51 of having carried out neutralizing treatment is disposed to outside from discharge point.Utilize above a series of operation, process draining 51 and be SS considerably less and BODcr and COD
5the very little processing draining of value, so can make the impact near environment discharge point, be irreducible minimum.
In addition, the handover between the treatment trough of above-mentioned object being treated, the handover from treatment trough to strainer or the handover from strainer to treatment trough are not limited to directly situation about transferring, and also can transfer via the retention basin that temporarily stores object being treated etc.In retention basin, can play the amount of the object being treated of regulate transferring, a plurality of object being treateds that will send here from a plurality for the treatment of troughs and converge one effect.In addition, the transfer mechanism the handover between the treatment trough of object being treated, the handover from treatment trough to strainer and the handover from strainer to treatment trough is not particularly limited, and the general transfer mechanism of use pump etc. gets final product.In addition, the volume of each treatment trough determines to get final product according to the amount that becomes the draining of processing object and proterties aptly.
Below embodiment is shown and further describes embodiment of the present utility model.Certainly, the utility model is not limited to following embodiment, for thin section, certainly can adopt variety of way.And then, the utility model is not limited to above-mentioned embodiment, can in the scope shown in claims, carry out various changes, for the disclosed technique means and the embodiment that obtains also is contained in technical scope of the present utility model respectively of combination aptly.In addition, quote as a reference the full content of the document of putting down in writing in this specification sheets.
As mentioned above, drain treatment apparatus of the present utility model is to discharge while carrying out the manufacture of polymkeric substance, comprise the drain treatment apparatus from the processing of the draining of the suspended solid of polymkeric substance, be configured to and comprise: the above-mentioned suspended solid in above-mentioned draining is floated to the 1st floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 1st is reclaimed floats the 2nd floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 2nd is reclaimed carries out vacuum drying drying machine, and the 1st strainer that the processing water that separator tank obtains from the above-mentioned the 1st floats is filtered.
According to above-mentioned formation, after the suspended solid in draining is floated to separation in separator tank on the 1st floats, thereby filtered removing the floating above processing water that the suspended solid of separation obtains, thereby can be removed residual suspended solid.Thus, can access the considerably less processing draining of suspended solid.In addition, by carrying out twice floating upper separation, concentrate suspended solid and carry out vacuum-drying, thereby can generate efficiently the suspended solid that can be used as the hygrometric state that regenerated polymer recycles.Processed the suspended solid reclaimed by recycling by draining, can further reduce the load to environment.
Drain treatment apparatus of the present utility model preferably and then comprise separator tank on Pressurized flotation, above-mentioned suspended solid in its backwash water obtained being contained in above-mentioned the 1st strainer of backwash carries out on Pressurized flotation separating, the above-mentioned the 2nd floating in separator tank, and then the above-mentioned suspended solid that separator tank from above-mentioned Pressurized flotation is reclaimed floats separation.
According to above-mentioned formation, a kind of drain treatment apparatus can be provided, finally can reclaim more suspended solid, can access the suspended solids that can be used as the regenerated polymer recycling more.
Drain treatment apparatus of the present utility model preferably and then comprise the 2nd strainer that filters the processing water that separator tank obtains from above-mentioned Pressurized flotation, on above-mentioned Pressurized flotation in separator tank, and then the above-mentioned suspended solid in the backwash water obtained being contained in above-mentioned the 2nd strainer of backwash carries out separating on Pressurized flotation.
According to above-mentioned formation, a kind of drain treatment apparatus can be provided, finally can reclaim more suspended solid, can access the suspended solids that can be used as the regenerated polymer recycling more.
In drain treatment apparatus of the present utility model, preferably on above-mentioned Pressurized flotation in separator tank so that the above-mentioned suspended solid comprised in the processing water that separator tank floating from the above-mentioned the 2nd is obtained carry out Pressurized flotation and separate.
According to above-mentioned formation, can by the 2nd floating in separator tank irretrievable suspended solid again be supplied to after separator tank on via Pressurized flotation the 2nd floating on separation in separator tank.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
In addition, the other mode of drain treatment apparatus of the present utility model is to discharge while carrying out the manufacture of polymkeric substance, comprise the drain treatment apparatus from the processing of the draining of the suspended solid of polymkeric substance, be configured to and comprise: the above-mentioned suspended solid in above-mentioned draining is floated to the 1st floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 1st is reclaimed floats the 2nd floating upper separator tank separated, the above-mentioned suspended solid that separator tank floating from the above-mentioned the 2nd is reclaimed carries out vacuum drying drying machine, in the processing water that separator tank floating from the above-mentioned the 1st is obtained, residual above-mentioned suspended solid carries out separator tank on Pressurized flotation that Pressurized flotation separates, the strainer that the processing water that separator tank from above-mentioned Pressurized flotation is obtained is filtered, filtrate from above-mentioned strainer is carried out to the lonely property biological treating tank of lonely property biological treatment, the aerophilons biological treating tank that the processing water obtained from above-mentioned lonely property biological treating tank is carried out to the aerophilons biological treatment, thereby and the coagulative precipitation groove that the processing water to obtaining from above-mentioned aerophilons biological treating tank is added to the condensation product precipitate and separate of flocculation agent formation.
According to above-mentioned formation, the suspended solid in draining is floated to separation in separator tank on the 1st floats, thereby in the processing water that the suspended solid of removing floating upper separation is obtained, residual suspended solid carries out in separator tank on Pressurized flotation separating on Pressurized flotation.And then, thereby the processing water that the suspended solid separated on the removal Pressurized flotation is obtained is filtered, thus can further remove residual suspended solid.Thus, during more draining, also can access the considerably less processing draining of suspended solid in the amount of processing suspended solid.In addition, even if the high draining of the value of COD and BOD is carried out the biological treatment of lonely property and aerophilons biological treatment and carries out the coagulative precipitation processing, thereby can access the low-down processing draining of value of COD and BOD.And then, concentrate suspended solid by carrying out twice floating upper separation, and, by vacuum-drying, can generate efficiently the suspended solid of the hygrometric state that can be used as the regenerated polymer recycling.
In drain treatment apparatus of the present utility model, preferably on above-mentioned Pressurized flotation in separator tank, the above-mentioned suspended solid comprised in the backwash water further above-mentioned strainer of backwash obtained carries out separating on Pressurized flotation.
According to above-mentioned formation, can will in separator tank on Pressurized flotation, not have separated suspended solid again to be supplied on Pressurized flotation and to separate.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
In drain treatment apparatus of the present utility model, the above-mentioned suspended solid comprised in the processing water preferably further separator tank from above-mentioned Pressurized flotation obtained in separator tank on the above-mentioned the 2nd floats floats separation.
According to above-mentioned formation, for irretrievable suspended solid in separator tank on the 1st floats, also can make it be contained in the suspended solid that is supplied to the separation in the 2nd floating upper separator tank.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
In drain treatment apparatus of the present utility model, the above-mentioned suspended solid comprised in the processing water preferably further separator tank floating from the above-mentioned the 2nd obtained in separator tank on above-mentioned Pressurized flotation carries out Pressurized flotation to be separated.
According to above-mentioned formation, can by the 2nd floating in separator tank irretrievable suspended solid again be supplied to after separator tank on via Pressurized flotation the 2nd floating on separation in separator tank.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
In drain treatment apparatus of the present utility model, preferably in above-mentioned coagulative precipitation groove to the processing water that obtains from above-mentioned aerophilons biological treating tank and then add the phosphorus remover.
According to above-mentioned formation, can remove the phosphorus in draining and obtain the processing draining that total phosphorus content reduces.
In addition, during manufacture that the treatment process of draining of the present utility model is polymkeric substance, discharge, contain the treatment process from the draining of the suspended solid of polymkeric substance, be configured to and comprise following operation: the above-mentioned suspended solid in above-mentioned draining is floated to the 1st separation circuit separated in separator tank on the 1st floats, the above-mentioned suspended solid that separated float to the 2nd separation circuit of separation on floating in separator tank the 2nd in above-mentioned the 1st separation circuit, the above-mentioned suspended solid separated in above-mentioned the 2nd separation circuit is carried out to vacuum drying drying process, and the 1st filter progress that the processing water obtained in above-mentioned the 1st separation circuit is filtered in the 1st strainer.
According to above-mentioned formation, a kind for the treatment of process of draining can be provided, can access the effect identical with above-mentioned drain treatment apparatus.
The treatment process of draining of the present utility model preferably and then comprise separation circuit on Pressurized flotation, after above-mentioned the 1st filter progress, above-mentioned suspended solid in the backwash water that is contained in above-mentioned the 1st strainer of backwash and obtains is separated on Pressurized flotation in separator tank on Pressurized flotation, the above-mentioned suspended solid after separating is sent to the above-mentioned the 2nd floating upper separator tank.
According to above-mentioned formation, for the suspended solid that could not reclaim in the 1st separation circuit, also can make it be contained in the suspended solid that is supplied to the 2nd separation circuit.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
The treatment process of draining of the present utility model preferably and then comprise the 2nd filter progress, in the 2nd strainer, filter by above-mentioned Pressurized flotation on the processing water that obtains of separation circuit, the backwash water that backwash the 2nd strainer is obtained be sent to separator tank on above-mentioned Pressurized flotation.
According to above-mentioned formation, can will in separation circuit on Pressurized flotation, not have separated suspended solid again to be supplied on Pressurized flotation and to separate.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
In the treatment process of draining of the present utility model, the processing water preferably obtained by above-mentioned the 2nd separation circuit is sent to separator tank on above-mentioned Pressurized flotation.
According to above-mentioned formation, can be by the separation of irretrievable suspended solid in again be supplied to the 2nd separation circuit after separation circuit on Pressurized flotation in the 2nd separation circuit.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as regenerated polymer and recycle can be accessed more.
In addition, during manufacture that other modes of the treatment process of draining of the present utility model are polymkeric substance, discharge, comprise the treatment process from the draining of the suspended solid of polymkeric substance, be configured to and comprise following operation: the above-mentioned suspended solid in above-mentioned draining is floated to the 1st separation circuit separated in separator tank on the 1st floats, the above-mentioned suspended solid separated in above-mentioned the 1st separation circuit is floated to the 2nd separation circuit separated in separator tank on the 2nd floats, the above-mentioned suspended solid separated in above-mentioned the 2nd separation circuit is carried out to vacuum drying drying process, separation circuit on the Pressurized flotation that above-mentioned suspended solid residual in the processing water obtained by above-mentioned the 1st separation circuit is carried out in separator tank separating on Pressurized flotation on Pressurized flotation, the filter progress that the processing water that separation circuit on above-mentioned Pressurized flotation is obtained is filtered in strainer, the filtrate obtained by above-mentioned filter progress is carried out to the lonely property biologic treatment process of lonely property biological treatment, the aerophilons biologic treatment process that processing water after above-mentioned lonely property biologic treatment process is carried out to the aerophilons biological treatment, and the coagulative precipitation operation of the condensation product precipitate and separate that the interpolation flocculation agent of the processing water to after above-mentioned aerophilons biologic treatment process is formed.
According to above-mentioned formation, a kind for the treatment of process of draining can be provided, can access the effect identical with above-mentioned drain treatment apparatus.
The treatment process of draining of the present utility model is preferably after above-mentioned filter progress, and the backwash water that the above-mentioned strainer of backwash is obtained is sent to separator tank on above-mentioned Pressurized flotation.
According to above-mentioned formation, can will in separation circuit on Pressurized flotation, not have separated suspended solid again to be supplied on Pressurized flotation and to separate.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
In the treatment process of draining of the present utility model, preferably on above-mentioned Pressurized flotation, in separation circuit, the suspended solid separated on Pressurized flotation is sent to the above-mentioned the 2nd floating upper separator tank.
According to above-mentioned formation, for irretrievable suspended solid in the 1st separation circuit, also can make it be contained in the suspended solid that is supplied to the 2nd separation circuit.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
In the treatment process of draining of the present utility model, the processing water that preferably will be obtained by above-mentioned the 2nd separation circuit is sent to separator tank on above-mentioned Pressurized flotation.
According to above-mentioned formation, irretrievable suspended solid in the 2nd separation circuit can be supplied to the separation in the 2nd separation circuit after separation circuit on via Pressurized flotation again.Therefore, finally more suspended solid can be reclaimed, the suspended solids that can be used as the regenerated polymer recycling can be accessed more.
Embodiment
(draining of embodiment 1:EWCL is processed)
For the low COD draining comprised from the SS of polymkeric substance, use the drain treatment apparatus with formation identical with above-mentioned drain treatment apparatus 1 to carry out the draining processing.The EWCL processed in the present embodiment discharges when polymers manufacturing, below CODcr:200mg/L, BOD
5: 100mg/L is following, SS: the following draining of average 500mg/L, total phosphorus content (T-P): 2mg/L.
At first, by EWCL with peak flow 80m
3/ h is sent to the 1st floating upper separator tank, and making the residence time is 1 hour, and the SS from polymkeric substance is floated to separation.After reclaiming on floating the SS dregs that separated, these SS dregs are sent to the 2nd floating upper separator tank, making the residence time is 30 minutes and again SS float to separation, thereby concentrates SS.Concentrated SS is sent to Vacuumdrier, utilizes vacuum-drying and obtain the SS wet feed of water ratio 50%.The SS wet feed obtained is as regenerated polymer and recirculation.
, in the limpid water that in separator tank, thereby separation SS obtains on the 1st floats, the concentration of SS is reduced to 100ppm.Make this limpid water with 40m
3the flow of/h is further removed SS by sand-bed filter.Its result, the concentration of the SS in the draining obtained as filtrate becomes below 20ppm.After this draining is neutralized in final neutralizing well, be discharged to outside.
In addition, the SS for the amount by the sand-bed filter trapping, after discharging, be sent to separator tank on Pressurized flotation as backwash water, further carries out separating treatment.
(draining of embodiment 2:EWCH is processed)
For the high COD draining contained from the SS of polymkeric substance, use the drain treatment apparatus with formation identical with above-mentioned drain treatment apparatus 2 to carry out the draining processing.That the EWCH processed in the present embodiment discharges while being polymers manufacturing, CODcr: average 4300mg/L, BOD
5: average 4000mg/L, SS:1000mg/L, total phosphorus content (T-P): the draining of average 70mg/L.
At first, by EWCH with peak flow 80m
3/ h is sent to the 1st floating upper separator tank, and making the residence time is 1 hour, and the SS from polymkeric substance is floated to separation.After reclaiming on floating the SS dregs that separated, these SS dregs are sent to the 2nd floating upper separator tank, making the residence time is 30 minutes and SS float to separation again, thereby concentrates SS.The SS concentrated is sent to Vacuumdrier and vacuum-drying, thereby obtains the SS wet feed of water ratio 50%.The SS wet feed obtained is as regenerated polymer and recirculation.
, in the limpid water that in separator tank, thereby separation SS obtains on the 1st floats, the density loss of SS is to average 400ppm.This limpid water is sent to separator tank on Pressurized flotation, and making the residence time is 30 minutes and SS is carried out separating on Pressurized flotation.The SS dregs that separated on Pressurized flotation are sent to the 2nd floating upper separator tank, and making the residence time is 30 minutes and SS float to separation again, thereby concentrates SS.The SS concentrated is sent to Vacuumdrier and vacuum-drying, thereby obtains the SS wet feed of water ratio 50%.The SS wet feed obtained is as regenerated polymer and recirculation.
, in the limpid water that in separator tank, thereby separation SS obtains on Pressurized flotation, the concentration of SS is reduced to average 100ppm.Make this limpid water with 30m
3the flow of/h, by sand-bed filter, is further removed SS.Its result, the concentration of the SS in the draining obtained as filtrate becomes below 20ppm.By this draining with 25m
3the flow of/h is sent to lonely property biological treating tank.In lonely property biological treating tank, make the residence time be carried out a biological disposal upon in 7.5 hours.Its result, the CODcr of draining and BOD
5be reduced to respectively average 900mg/L and average 850mg/L.And then, by draining with 25m
3the flow of/h is sent to the aerophilons biological treating tank from the property biological treating tank of being sick of, and makes the residence time be carried out a biological disposal upon in 3 hours.Its result, the CODcr of draining and BOD
5be reduced to respectively below 100mg/L and below 100mg/L.Then, draining is sent to collection surface, in collection surface, in draining, adds calcium chloride and polymer coagulant.Thus, make the phosphorus comprised in draining and condense from biological SS.The draining that will contain these is sent to the coagulative precipitation groove, precipitate and separate condensation product in the coagulative precipitation groove.Thus, T-P is reduced to 1.6mg/L.After this draining is neutralized in final neutralizing well, be discharged to outside.
On the other hand, the mud precipitated in the coagulative precipitation groove is sent to pressure filter, after being dewatered to water ratio 75%, is landfilled processing.
Utilize possibility on industry
The utility model can be used in the manufacturing field that produces in large quantities polymkeric substance aptly.
Claims (9)
1. a drain treatment apparatus, during to the manufacture of polymkeric substance, discharge, comprise from the draining of the suspended solid of polymkeric substance and processed, it is characterized in that, comprise:
To the above-mentioned suspended solid in above-mentioned draining float the 1st floating upper separator tank that separates,
To the above-mentioned suspended solid reclaimed from the above-mentioned the 1st floating separator tank float the 2nd of separation float above separator tank,
To the above-mentioned suspended solid from the above-mentioned the 2nd floating separator tank recovery carry out vacuum drying drying machine,
The 1st strainer that the processing water that separator tank floating from the above-mentioned the 1st is obtained is filtered.
2. drain treatment apparatus according to claim 1, is characterized in that,
Also comprise separator tank on Pressurized flotation, the above-mentioned suspended solid comprised in the backwash water that above-mentioned the 1st strainer of backwash is obtained carries out on Pressurized flotation separating,
On the above-mentioned the 2nd floats, in separator tank, the above-mentioned suspended solid further separator tank from above-mentioned Pressurized flotation reclaimed floats separation.
3. drain treatment apparatus according to claim 2, is characterized in that,
Also comprise the 2nd strainer that filters the processing water that separator tank obtains from above-mentioned Pressurized flotation,
On above-mentioned Pressurized flotation, in separator tank, the above-mentioned suspended solid comprised in the backwash water further above-mentioned the 2nd strainer of backwash obtained carries out separating on Pressurized flotation.
4. according to the described drain treatment apparatus of claim 2 or 3, it is characterized in that,
On above-mentioned Pressurized flotation, in separator tank, further the above-mentioned suspended solid comprised in the processing water obtained by the above-mentioned the 2nd floating upper separator tank is carried out separating on Pressurized flotation.
5. a drain treatment apparatus, during to the manufacture of polymkeric substance, discharge, comprise from the draining of the suspended solid of polymkeric substance and processed, it is characterized in that, comprise:
To the above-mentioned suspended solid in above-mentioned draining float the 1st floating upper separator tank that separates,
To the above-mentioned suspended solid reclaimed from the above-mentioned the 1st floating separator tank float the 2nd of separation float above separator tank,
To the above-mentioned suspended solid from the above-mentioned the 2nd floating separator tank recovery carry out vacuum drying drying machine,
In the processing water that separator tank floating from the above-mentioned the 1st is obtained residual above-mentioned suspended solid carry out separator tank on Pressurized flotation that Pressurized flotation separates,
The strainer that the processing water that separator tank from above-mentioned Pressurized flotation is obtained is filtered,
To the filtrate from above-mentioned strainer carry out the biological treatment of lonely property lonely property biological treating tank,
To the processing water obtained from above-mentioned lonely property biological treating tank carry out the aerophilons biological treatment the aerophilons biological treating tank,
Thereby the processing water to obtaining from above-mentioned aerophilons biological treating tank is added to the coagulative precipitation groove of the condensation product precipitate and separate of flocculation agent formation.
6. drain treatment apparatus according to claim 5, is characterized in that,
On above-mentioned Pressurized flotation, in separator tank, the above-mentioned suspended solid comprised in the backwash water further above-mentioned strainer of backwash obtained carries out separating on Pressurized flotation.
7. according to the described drain treatment apparatus of claim 5 or 6, it is characterized in that,
On the above-mentioned the 2nd floats, in separator tank, the above-mentioned suspended solid comprised in the processing water further separator tank from above-mentioned Pressurized flotation obtained floats separation.
8. according to the described drain treatment apparatus of claim 5 or 6, it is characterized in that,
On above-mentioned Pressurized flotation, in separator tank, the above-mentioned suspended solid comprised in the processing water further separator tank floating from the above-mentioned the 2nd obtained carries out Pressurized flotation to be separated.
9. according to the described drain treatment apparatus of claim 5 or 6, it is characterized in that,
In above-mentioned coagulative precipitation groove, the processing water to being obtained by above-mentioned aerophilons biological treating tank, further add the phosphorus remover.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-190236 | 2012-08-30 | ||
| JP2012190236A JP5938304B2 (en) | 2012-08-30 | 2012-08-30 | Waste water treatment method and waste water treatment apparatus |
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| CN203373214U true CN203373214U (en) | 2014-01-01 |
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ID=49835761
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| CN201310307866.2A Pending CN103663755A (en) | 2012-08-30 | 2013-07-22 | Drained water treatment method and drained water treatment device |
| CN201320435538.6U Expired - Fee Related CN203373214U (en) | 2012-08-30 | 2013-07-22 | Discharge water treatment device |
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| CN103663755A (en) * | 2012-08-30 | 2014-03-26 | 株式会社吴羽 | Drained water treatment method and drained water treatment device |
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| CN108435773A (en) * | 2018-04-18 | 2018-08-24 | 河海大学 | A kind of micro- flotation of Plastics separator and its application method |
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| DE2220867A1 (en) * | 1972-04-28 | 1973-11-08 | Kloeckner Humboldt Deutz Ag | PROCESS FOR THE PROCESSING OF WASTE CONTAINING PLASTIC PARTICLES |
| JPS6133285A (en) * | 1984-07-24 | 1986-02-17 | Rasa Shoji Kk | Treatment of sewage |
| JPH0938636A (en) * | 1995-07-28 | 1997-02-10 | Roki Techno:Kk | Method for recovering dispersed material in liquid by flotation |
| JP2000084568A (en) * | 1998-09-11 | 2000-03-28 | Fuji Heavy Ind Ltd | Treatment of resin-containing waste water |
| JP2005040733A (en) * | 2003-07-24 | 2005-02-17 | Hotani:Kk | Oil-containing alkali solution separator |
| CN101870538B (en) * | 2009-04-24 | 2012-02-01 | 天津市润彤磬科技发展有限公司 | Purification method and purification system of kitchen waste water |
| CN101955293A (en) * | 2009-07-11 | 2011-01-26 | 甘肃雪晶生化有限责任公司 | Method for processing high-concentration organic waste water |
| CN201793456U (en) * | 2010-07-07 | 2011-04-13 | 湖南国祯环保科技有限责任公司 | Oily sewage treatment system |
| JP5938304B2 (en) * | 2012-08-30 | 2016-06-22 | 株式会社クレハ | Waste water treatment method and waste water treatment apparatus |
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| CN103663755A (en) * | 2012-08-30 | 2014-03-26 | 株式会社吴羽 | Drained water treatment method and drained water treatment device |
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| JP5938304B2 (en) | 2016-06-22 |
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