CN104058550A - Water Processing Method And System - Google Patents
Water Processing Method And System Download PDFInfo
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- CN104058550A CN104058550A CN201410092779.4A CN201410092779A CN104058550A CN 104058550 A CN104058550 A CN 104058550A CN 201410092779 A CN201410092779 A CN 201410092779A CN 104058550 A CN104058550 A CN 104058550A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Activated Sludge Processes (AREA)
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- Treatment Of Water By Oxidation Or Reduction (AREA)
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Abstract
The invention provides a water processing method and system capable of removing COD and BOD in water with high degree. The water processing method comprises the following procedures of introducing processed water (1) into a pre-processing groove (11), leading preprocessed water (2) flowing out of the pre-processed groove (11) into a biological reaction groove (21) to get biological processed water (3), concentrating the biological processed water (3) via a concentration mechanism (31) to get concentrated water (6), leading the concentrated water (6) into an oxidation mechanism (51) to get oxidation resolved water (7) via oxidation treatment and returning the oxidization resolved water (7) to the pre-processing groove (11) to enable the oxidization resolving water (7) to have a contact with the processed water (1).
Description
Technical field
Water treatment method and the water treatment system of biological processes and physical chemistry processing are the present invention relates to combine, even particularly contain the processed water of biological hardly-degradable substance, the water treatment method of also can decompose to heavens, removing and water treatment system.
Background technology
At present, known have the water treatment method and the water treatment system that have combined biological processes and physical chemistry processing, a kind of method is for example disclosed in patent documentation 1, the method comprises: after processed water is carried out a biological disposal upon, use reverse osmosis membrane apparatus etc. is separated into condensed water and sees through water, condensed water is carried out, after oxide treatment, it being recycled in biological treatment.
Look-ahead technique document
Patent documentation
Patent documentation 1:(Japan) JP 2002-306930 communique
Summary of the invention
The problem that invention will solve
According to disclosed method in patent documentation 1, by condensed water is carried out carrying out a biological disposal upon after oxide treatment, can remove COD (chemical oxygen demand (COD)) and BOD (biological oxygen demand).But, in the processing water obtaining condensed water is carried out to oxide treatment, likely remain oxidizing substance, if the processing water that remains oxidizing substance is directly returned to biological reaction tank, oxidizing substance for example works as disinfectant, microorganism in biological reaction tank is brought to disadvantageous effect, likely reduce biological treatment performance.Consequently, may reduce the performance of removing of COD and BOD.
The present invention In view of the foregoing carries out, and its object is to provide a kind of can highly remove COD in processed water and water treatment method and the water treatment system of BOD.
The method of dealing with problems
The water treatment method of the present invention that can solve above-mentioned problem is characterised in that to have following operation: the operation that processed water is imported to pre-treatment groove; The pre-treatment water importing biological reaction tank of the past treatment trough outflow is obtained to the operation of biological treatment of water; By concentrated mechanism, biological treatment of water is concentrated, obtain the operation of condensed water; Condensed water is carried out oxide treatment and obtained the operation of oxygenolysis water; And oxygenolysis water is returned to the operation that pre-treatment groove makes it contact with processed water.According to water treatment method of the present invention, by the biological treatment of water obtaining that processed water is carried out a biological disposal upon is concentrated and oxide treatment, the biological hardly-degradable substance containing can be decomposed and BODization effectively in processed water.And, the oxygenolysis water obtaining by oxide treatment is carried out a biological disposal upon again, can highly be removed thus the biological treatment of water of COD and BOD.Now, do not make oxygenolysis water directly be returned to biological reaction tank, and the pre-treatment groove that is returned to the leading portion of biological reaction tank makes it contact with processed water, thus, the oxidizing substance remaining in oxygenolysis water is reduced by processed water, thereby has suppressed its disadvantageous effect to the biological treatment in biological treating tank.In addition, a part for processed water is left in the oxidizing substance oxygenolysis in oxygenolysis water, thereby can also expect that the COD concentration of the biological treatment of water flowing out from biological treating tank reduces.
In pre-treatment groove, preferably supply with microvesicle to processed water.By supply with microvesicle in pre-treatment groove, promote the decomposition of processed water, simultaneously, promote to be returned to the consumption of the oxidizing substance containing in the oxygenolysis water of pre-treatment groove, its result, can predict the performance of carrying out a biological disposal upon and improve in biological treating tank, or biological treatment is suitably carried out.
Preferably, concentrated mechanism is the device that possesses semi-permeable membranes.If concentrated mechanism is the device that possesses semi-permeable membranes and by semi-permeable membranes, biological treatment of water is concentrated, can utilize fewer energy to obtain condensed water.
Preferably, utilize membrane separation unit that the trough inner water of biological reaction tank is carried out to solid-liquid separation, obtain thus biological treatment of water.By utilizing membrane separation unit that the trough inner water of biological reaction tank is carried out to solid-liquid separation, can improve the sludge concentration (microorganism concn) of trough inner water, thereby realize the densification of biological reaction tank.In addition, the biological treatment of water obtaining becomes the biological treatment of water that solids component is highly removed, therefore be easy to utilize concentrated mechanism suitably to concentrate in enrichment process, and, in oxide treatment operation, also deliquescent biological hardly-degradable substance can be decomposed effectively.
Water treatment method of the present invention also can further have the operation of condensed water being carried out to electrolysis and obtain brine electrolysis, and brine electrolysis is carried out oxide treatment and obtains oxygenolysis water.By condensed water is carried out to electrolysis, can generate oxygenant, the oxygenant generating like this can replace the oxygenant using in oxide treatment operation.In water treatment method of the present invention, because solute circulates in treatment system, therefore, generate oxygenant by condensed water is carried out to electrolysis, can suppress solute concentration and rise.
Also can be, in oxide treatment operation, by making condensed water contact with oxide catalyst and carry out oxide treatment, thereby to obtain oxygenolysis water under oxygenant coexists.By using oxide catalyst to carry out oxide treatment, can effectively carry out oxide treatment to condensed water.
The present invention is also provided for the water treatment system of water treatment method of the present invention., water treatment system of the present invention is characterised in that to have: the pre-treatment groove that imports processed water; The carrying path of the pre-treatment water that treatment trough flows out in the past; The biological reaction tank being communicated with the carrying path of pre-treatment water; Import the biological treatment of water flowing out from biological reaction tank, improve the solute concentration of this biological treatment of water and obtain the concentrated mechanism of condensed water; And condensed water is carried out oxide treatment and obtained the oxygenation machanism of oxygenolysis water, wherein, be provided with the foldback path that oxygenolysis water is delivered to pre-treatment groove.According to water treatment system of the present invention, can highly remove COD and BOD in processed water.Preferably in pre-treatment groove, possesses microbubble generator from microvesicle to processed water that supply with.Preferably concentrated mechanism possesses semi-permeable membranes.Membrane separation unit is preferably set in biological reaction tank, is directed to concentrated mechanism from the membrane filtration water of membrane separation unit.The electrolyzer that condensed water is carried out to electrolysis also can be set in the carrying path of condensed water.As oxygenation machanism, oxygenant feed mechanism and the hydrogen-catalyst reactor that possesses oxide catalyst can be set.
The effect of invention
According to water treatment method of the present invention and water treatment system, by the biological treatment of water obtaining that processed water is carried out a biological disposal upon is concentrated and oxide treatment, biological hardly-degradable substance contained in processed water can be decomposed and BODization effectively.And, the oxygenolysis water obtaining by oxide treatment is carried out a biological disposal upon again, can highly be removed thus the biological treatment of water of COD and BOD.Now, the pre-treatment groove that oxygenolysis water is returned to the leading portion of biological reaction tank makes it contact with processed water, thus, the oxidizing substance remaining in oxygenolysis water is reduced by processed water, thereby has suppressed its disadvantageous effect to the biological treatment in biological treating tank.In addition, a part for processed water is left in the oxidizing substance oxygenolysis in oxygenolysis water, thereby can also expect that the COD concentration of biological treatment of water reduces.
Brief description of the drawings
Fig. 1 represents the schema of water treatment method of the present invention.
Fig. 2 represents an example of water treatment system of the present invention.
Fig. 3 represents another example of water treatment system of the present invention.
Fig. 4 represents another example of water treatment system of the present invention.
Fig. 5 represents another example of water treatment system of the present invention.
Fig. 6 represents another example of water treatment system of the present invention.
Nomenclature
1: processed water
2: pre-treatment water
3: biological treatment of water
5: Separation of Water
6: condensed water
7: oxygenolysis water
11: pre-treatment groove
12: microbubble generator
21: biological reaction tank
23,50: membrane separation unit
31: concentrated mechanism's (reverse osmosis membrane apparatus)
41: thickener
43: concentrated mechanism's (forward osmosis membrane device)
51: oxygenation machanism (hydrogen-catalyst reactor)
52: oxygenation machanism (oxygenant feed mechanism)
53: electrolyzer
54: foldback path
Embodiment
Water treatment method and the water treatment system of biological processes and physical chemistry processing are the present invention relates to combine.According to the present invention, even the processed water that contains biological hardly-degradable substance also can be processed biological hardly-degradable substance is decomposed effectively by physical chemistry, then by it is carried out to biological processes, obtain the processing water of high purification.Below, with reference to Fig. 1, water treatment method of the present invention and water treatment system are described.
Water treatment method of the present invention has: the operation (pretreatment procedure) that processed water is imported to pre-treatment groove, the pre-treatment water importing biological reaction tank of the past treatment trough outflow is obtained to the operation (biologic treatment process) of biological treatment of water, biological treatment of water is concentrated to the operation (enrichment process) that obtains condensed water by concentrated mechanism, condensed water is carried out oxide treatment and obtained the operation (oxide treatment operation) of oxygenolysis water, and oxygenolysis water is returned to pre-treatment groove and makes its operation contacting with processed water (foldback operation).Water treatment method of the present invention is particularly suitable for the processing of the processed water that contains biological hardly-degradable substance, specifically, is applicable to the processing of the processed water that contains the COD (chemical oxygen demand (COD)) more much higher than BOD (biological oxygen demand).
In water treatment method of the present invention, first processed water is imported to pre-treatment groove, import afterwards biological reaction tank and carry out a biological disposal upon (biological processes), in processed water, contain in the situation of biological hardly-degradable substance, be difficult to these material decomposition, remove by carrying out a biological disposal upon.Thereby, in water treatment method of the present invention, by at least a portion of biological treatment of water being concentrated and carrying out oxide treatment, biological hardly-degradable substance is effectively decomposed and converts biological easily decomposability material to, it is returned to biological reaction tank again and carries out a biological disposal upon, can highly have been removed thus the biological treatment of water of COD and BOD.But, while processing like this, although obtained oxygenolysis water by carrying out oxide treatment, but for biological hardly-degradable substance being decomposed by oxide treatment, need under exacting terms, carry out in a way oxide treatment, consequently, residual oxidizing substance likely in oxygenolysis water.On the contrary, under the condition relaxing, carry out oxide treatment, possibly biological hardly-degradable substance fully cannot be decomposed.,, from the viewpoint of improving oxygenolysis rate, have to make more residual oxidizing substances in oxygenolysis water.But if like this oxygenolysis water that remains oxidizing substance is directly returned to biological reaction tank, oxidizing substance for example works as disinfectant, bring detrimentally affect can to the microorganism in biological reaction tank, biological treatment performance may reduce.Therefore, in water treatment method of the present invention, oxygenolysis water is returned to the pre-treatment groove of biological reaction tank leading portion, it is contacted with processed water.So, by oxygenolysis water is contacted with processed water, oxidizing substance contained in oxygenolysis water is reduced by processed water, simultaneously, in processed water, the oxidized property of a part for contained biological hardly-degradable substance material decomposition can effectively be carried out a biological disposal upon in ensuing biologic treatment process.Below, each operation of water treatment method of the present invention is elaborated.
In pretreatment procedure, processed water is imported to pre-treatment groove.In the present invention, be not particularly limited as the processed water of handling object.In processed water, can contain organism, also can contain organic/inorganic substance.It should be noted that, because water treatment method of the present invention has biologic treatment process, therefore preferably processed water at least contains organism.In addition, because water treatment method of the present invention has oxide treatment operation, therefore, even if contain hard-decomposed organic in processed water, also can suitably process.As the processed water using in the present invention, can enumerate the draining from factories such as ironmaking, iron and steel, non-ferrous metal, machinery, metal processing, plating, application, cement, oil; From the draining of food factories or paper mill etc.; Landfill leaches water; Sewage; Movement; Livestock excrement; Kitchen drainage etc.Before processed water is imported to pre-treatment groove, also can temporarily be stored in Flow-rate adjustment groove or settling bath.
The pre-treatment groove that has imported processed water is not particularly limited, as long as keeping the treatment trough of processed water., pre-treatment groove can be also the simple tank that special equipment is not set.As long as the oxygenolysis water obtaining in oxide treatment operation is returned to pre-treatment groove, and processed water contacts with oxygenolysis water in pre-treatment groove.It should be noted that, in order to improve the contact efficiency of processed water and oxygenolysis water, in pre-treatment groove, also can possess whipping appts or loose device of air.In addition, as described later, also can in pre-treatment groove, microbubble generator be set, supply with microvesicle by microbubble generator to processed water.
In the past the pre-treatment water that treatment trough flows out is imported into biological reaction tank.Pre-treatment water is transported to biological reaction tank by carrying path, and biological reaction tank is communicated with setting with the carrying path of pre-treatment water.The carrying path of pre-treatment water can be the stream on pipeline or open channel or the dividing plate of being located at pre-treatment groove and biological reaction tank, the path of the pre-treatment water while carrying pre-treatment water as long as the past treatment trough to biological reaction tank.In the carrying path of pre-treatment water, Flow-rate adjustment groove or settling bath etc. can be set.About other carrying path of following explanation or foldback path too.
In biologic treatment process, the pre-treatment water that the past treatment trough is flowed out imports biological reaction tank and obtains biological treatment of water.In biological reaction tank, carry out a biological disposal upon.The processing of biological treatment as long as processing importing the pre-treatment water of biological reaction tank under the existence of microorganism, preferably aerobe processing.Therefore, preferably biological reaction tank at least has aerobic slot.
As biological treatment, can enumerate activated sludge process (comprising film separated activated sludge method), support methods, static bed biomembrane method etc.Biological reaction tank can be according to the proterties of processed water and the desired composition of removing, by appropriately combined to aerobic slot or anaerobism groove etc. and form, for example, by by aerobic slot and anaerobism groove and/or the combination of anaerobic groove, in can removing pre-treatment water, contained carbon component, can also remove nitrogen component and/or phosphorus composition.
By pre-treatment water being carried out a biological disposal upon in biologic treatment process, BOD contained in pre-treatment water is removed, and the biological treatment of water obtaining becomes the processing water that has reduced BOD.At least a portion of the biological treatment of water obtaining in biologic treatment process imports to concentrated mechanism, and a remaining part can be used as processing water and is discharged to outside system.The discharge of biological treatment of water outside system can suitably determine according to the water quality of biological treatment of water, for example, the water quality of biological treatment of water and the water quality benchmark of releasing can be compared, and determines the output of biological treatment of water outside system according to the mode that meets this benchmark.Now, in enrichment process, follow concentrated and obtain in the situation of Separation of Water of high purification, also can investigate the dilution effect that Separation of Water brings and decide the output of biological treatment of water outside system.It should be noted that, also condensed water described later can be discharged to outside system as processing water.
In water treatment method of the present invention, not that whole amounts of biological treatment of water are discharged to outside system, but part or all of biological treatment of water is supplied to enrichment process.Water treatment method of the present invention is especially applicable to the processing of the processed water that contains biological hardly-degradable substance, in the situation that this processed water is processed, residual a certain amount of COD in the biological treatment of water obtaining in biologic treatment process, easily makes that biological treatment of water is all measured to direct discharge system and becomes difficulty outward.
Membrane separation unit also can be set in biological reaction tank.In this case, for example, the trough inner water of biological reaction tank is carried out to solid-liquid separation by membrane separation unit and obtain biological treatment of water, import to concentrated mechanism using the membrane filtration water from membrane separation unit as biological treatment of water.The trough inner water of biological reaction tank is carried out to solid-liquid separation by membrane separation unit, thus, improved the sludge concentration (microorganism concn) of trough inner water, thereby can realize the densification of biological reaction tank.In addition, because obtained biological treatment of water becomes the processing water of highly having removed solids component, therefore by this processing water is supplied to enrichment process, be easy to suitably adopt the concentrated of concentrated mechanism execution, and then, in the oxide treatment operation of back segment, deliquescent biological hardly-degradable substance can be decomposed effectively.
Membrane separation unit can be located at outside the groove of biological reaction tank.In this case, the biological treatment of water obtaining in biologic treatment process is carried out to solid-liquid separation by membrane separation unit, be imported into concentrated mechanism from the membrane filtration water of membrane separation unit.In this case, being also easy to suitably adopt the concentrated of concentrated mechanism execution in the enrichment process of back segment, and then, in the oxide treatment operation of back segment, deliquescent biological hardly-degradable substance can be decomposed effectively.
As long as membrane separation unit possesses membrane filtration material, the trough inner water of biological reaction tank or biological treatment of water can be carried out to solid-liquid separation.The aperture of membrane filtration material is not particularly limited, preferred so-called microfiltration membrane (MF film) or ultra-filtration membrane (UF film).The shape of membrane filtration material is not particularly limited, and can be hollow fiber membrane, tubular film, tabular film etc.The starting material that form film are also not particularly limited, for example, can enumerate: the organic membrane such as rhodia, polyvinylidene difluoride (PVDF), polyolefine, chlorinatedpolyethylene, polymeric amide, polyacrylonitrile, tetrafluoroethylene; The mineral membranes such as pottery (for example, mullite, aluminum oxide, zirconium white) etc.
Biological treatment of water also can for example, be carried out solid-liquid separation by the solid-liquid separation device (settling bath) beyond membrane separation unit, and the biological treatment of water that has reduced solid component concentration is supplied to enrichment process.The solids component (mud etc.) being separated by solid-liquid separation device, for example, be extracted to outside system, implements concentrated or dehydration etc. and subtract appearanceization processing.
The biological treatment of water obtaining in biologic treatment process is directed to enrichment process, is concentrated by concentrated mechanism, obtains thus condensed water.Biological treatment of water is directed to concentrated mechanism.Biological treatment of water can be the overflow water from biological treating tank, can be also to isolate the water after solids component by membrane separation unit.Biological treatment of water can directly be supplied to concentrated mechanism, also can be supplied to concentrated mechanism through settling bath or Flow-rate adjustment groove.In addition, concentrated mechanism can flood and be arranged in biological reaction tank, and the biological treatment of water in biological reaction tank is directed into concentrated mechanism.In concentrated mechanism, improve the solute concentration of biological treatment of water, obtain condensed water.
Concentrated mechanism is not particularly limited, as long as can improve the solute concentration of biological treatment of water, can enumerate: used the concentrating unit (reverse osmosis membrane apparatus, forward osmosis membrane device, nano filter membrance device, electrodialysis device etc.) of semi-permeable membranes and evaporation unit (heating vaporization, reduction vaporization method etc.), freeze concentration device (interface nibbling method, suspended crystallization method etc.), also these devices can be combined, carry out to the multistage concentration.Obtain comparing biological treatment of water and improved the condensed water of solute concentration by concentrated mechanism, consequently, biological hardly-degradable substance contained in biological treatment of water (particularly deliquescent biological hardly-degradable substance) effectively can be decomposed in the oxide treatment operation of back segment.Or, arrange to condensed water carried out electrolysis and obtained the operation (electrowinning process) of brine electrolysis at the leading portion of oxide treatment operation, in this situation, can be in electrowinning process the solute of electrolysis biological treatment of water effectively.
It should be noted that, obtain condensed water in enrichment process time, water is separated, at this moment, and the Separation of Water of the solute concentration that has been reduced.Although Separation of Water also depends on kind and the operational condition of concentrated mechanism, also can obtain highly purified water.Separation of Water is discharged to outside system, and the Separation of Water being discharged to outside system can discharge in environment, or also can such as, in other purposes (process water etc.), recycle.
Concentrated mechanism preferably possesses semi-permeable membranes, preferably by semi-permeable membranes, biological treatment of water is concentrated.For example, when the concentrated mechanism that possesses semi-permeable membranes is reverse osmosis membrane apparatus, forward osmosis membrane device or nano filter membrance device, preferably, concentrated mechanism possesses semi-permeable membranes, have across this semi-permeable membranes and import the primary side of biological treatment of water and the secondary side of its opposition side, water in the biological treatment of water of importing primary side permeates to secondary side, thereby improves the solute concentration of the biological treatment of water of primary side.Semi-permeable membranes is not particularly limited, and as long as the film that water molecules at least sees through, a certain size is above molecule or ion do not see through, can use known semi-permeable membranes.The constituent material of semi-permeable membranes and the shape of semi-permeable membranes etc. are not particularly limited.As the constituent material of semi-permeable membranes, for example, can enumerate: rhodia, aromatic poly amide, polyvinyl alcohol, polysulfones etc., as the shape of semi-permeable membranes, can enumerate hollow fiber membrane, spiral membrane, tubular membrane etc.If use reverse osmosis membrane apparatus or nano filter membrance device as concentrated mechanism, can obtain condensed water with fewer energy.
Use reverse osmosis membrane apparatus or nano filter membrance device as possessing in the situation of concentrated mechanism of semi-permeable membranes, make the primary side of semi-permeable membranes exist biological treatment of water, secondary side to exist through water, by primary side is pressurizeed, water is permeated to secondary side from primary side, thus can the biological treatment of water of primary side is concentrated.It should be noted that, use in reverse osmosis membrane apparatus or the nano filter membrance device situation as concentrated mechanism, if contain the solids components such as mud in biological treatment of water, the obstruction of possibility generating unit, is difficult to stably process.Thereby, preferably by by membrane separation unit the trough inner water to biological reaction tank or biological treatment of water carry out membrane filtration water that solid-liquid separation obtains and import to the primary side of reverse osmosis membrane apparatus or nano filter membrance device.
Use forward osmosis membrane device as possessing in the situation of concentrated mechanism of semi-permeable membranes, make biological treatment of water be present in semi-permeable membranes primary side, make the hypertonic solution that osmotic pressure is higher than the osmotic pressure of biological treatment of water be present in secondary side, utilize the osmotic pressure official post water of biological treatment of water and hypertonic solution to permeate to secondary side from primary side, thus can the biological treatment of water of primary side is concentrated.Hypertonic solution is the aqueous solution that is dissolved with solute, is not particularly limited, as long as demonstrating the solution of the osmotic pressure higher than biological treatment of water.Under isothermal condition, the osmotic pressure of hypertonic solution means that than the osmotic pressure of biological treatment of water is high hypertonic solution has the solute concentration higher than biological treatment of water (volumetric molar concentration).As hypertonic solution, for example, can use bucks such as the aqueous solution, seawater or the salt lake saline of salt, carbohydrate, water-soluble polymer etc. etc.It should be noted that, use in the situation of forward osmosis membrane device, water permeates to secondary side from the primary side of semi-permeable membranes, thus, hypertonic solution is diluted, but also the hypertonic solution after dilute with water can be concentrated and improved after solute concentration by reverse osmosis processing, be re-supplied to the secondary side of forward osmosis membrane device.In situation about processing by forward osmosis membrane device, wider for the concentration of solids component contained in handling object water and the tolerable limit of size thereof, even if the biological treatment of water that mud etc. is contained to solids component is processed, be also difficult for causing that device stops up.Therefore, also forward osmosis membrane device dipping can be arranged in biological reaction tank, the trough inner water of biological reaction tank (biological treatment of water) is concentrated.Or, also can be communicated with thickener is set with biological reaction tank, forward osmosis membrane device dipping is arranged in the biological treatment of water that imports to thickener, by concentrated biological treatment of water and obtain condensed water.
Use electrodialysis device as possessing in the situation of concentrated mechanism of semi-permeable membranes, biological treatment of water alternative arrangement between anode and negative electrode is formed with in the little case chamber of anion-exchange membrane and cationic exchange membrane to circulate, by electrode application voltage being made to the ionic transfer in biological treatment of water, thereby can obtain condensed water.
Use in the freeze concentration device situation as concentrated mechanism, utilize zero pour poor of water in biological treatment of water and solute, make ice crystal separate out and separate, thus, can improve the solute concentration of biological treatment of water.Especially be applicable to using the progressive freeze concentration device in interface, the progressive freeze concentration device in this interface flows in a certain direction biological treatment of water in the processed liquid stream of freeze concentration device, the wall of cooling this stream, form successively ice crystal and make its growth at the wall of processed liquid stream, thus can biological treatment of water is concentrated.
The condensed water obtaining in enrichment process is supplied to oxide treatment operation, obtains oxygenolysis water by condensed water is carried out to oxide treatment.Carry out oxide treatment by oxygenation machanism, condensed water is transported to oxygenation machanism by carrying path.The carrying path of condensed water, as long as carrying the stream of condensed water, for example, with concentrated mechanism connection setting, or is provided with dipping tank (for example, biological reaction tank or thickener) the connection setting that concentrates mechanism.Oxygenation machanism is communicated with setting with the carrying path of condensed water.By condensed water is carried out to oxide treatment, biological hardly-degradable substance contained in condensed water can be decomposed, convert biological easily decomposability material to.,, in oxide treatment operation, can convert COD hard-decomposed biology contained in condensed water to BOD.And, by being returned to biological reaction tank again, the oxygenolysis water that has passed through BODization carries out a biological disposal upon, can highly be removed the processing water of COD and BOD.
Oxygenation machanism is not particularly limited, as long as the solute of oxidable condensed water, can enumerate: uviolizing, interpolation oxygenant (for example, ozone, chlorine are oxygenant, hydrogen peroxide etc.), first supercritical processing, subcritical processing, wet oxidation etc.In addition, also can adopt uviolizing and add accelerating oxidation processing that the oxygenants such as ozone or hydrogen peroxide are combined, Fenton (Fenton) oxide treatment that hydrogen peroxide and iron catalyst are combined etc.
The oxide treatment of being undertaken by interpolation oxygenant can be the method that condensed water is contacted with oxide catalyst under oxygenant coexists.In this situation, as oxygenation machanism, oxygenant feed mechanism (for example, the combination of oxygenant storage tanks and pump) is set and possesses the hydrogen-catalyst reactor of oxide catalyst.By using oxide catalyst to carry out oxide treatment, can effectively carry out oxide treatment to condensed water.
The oxide treatment of being undertaken by catalyzer can be make catalyzer near normal temperature and pressure (for example, temperature is that scope, the pressure of 0 DEG C～80 DEG C is the scope of 50kPa～150kPa (absolute pressure)) method of reacting, also can be the catalytic wet air oxidation that catalyzer for example, is reacted in High Temperature High Pressure (, temperature is that scope, the pressure of 80 DEG C～370 DEG C are the region that condensed water keeps liquid phase).In addition, from the viewpoint of effectively carrying out oxide treatment, preferential oxidation catalyzer is filled into hydrogen-catalyst reactor cambial method.Oxide catalyst uses known oxide catalyst, for example, can use the catalyzer being formed by the metals such as iron, manganese, cobalt, chromium, nickel, tungsten, copper, silver, gold, platinum, magnesium, aluminium, zinc, silicon, tin, yttrium, zirconium, niobium, molybdenum, titanium or its oxide compound or their alloy, composite oxides.The shape of catalyzer can form particulate state, granular, Powdered, ring-type, cellular, in addition, also catalyzer can be held on the carriers such as porous ceramic, activated carbon, zeolite.
Be oxygenant as chlorine, can enumerate: hypochlorite, chlorous acid, chloric acid, dioxide peroxide etc.Chlorine is how oxide compound uses in water treatment, processing ease.
Oxygenant also can produce by condensed water is carried out to electrolysis.In this situation, water treatment method of the present invention also has the operation that condensed water electrolysis is obtained to brine electrolysis, obtains oxygenolysis water by brine electrolysis being carried out to oxide treatment in oxide treatment operation.For condensed water is carried out to electrolysis, electrolyzer can be set.In this situation, electrolyzer can be regarded oxygenant feed mechanism as.Electrolyzer is arranged in the carrying path of condensed water, and oxygenation machanism is located at the downstream side (back segment) of electrolyzer.
For example, in condensed water, contain in the situation of chloride ion, by condensed water is carried out to electrolysis, obtain containing the brine electrolysis of hypochlorous acid as oxygenant.In addition, in condensed water, contain in the situation of mangaic acid, by electrolysis, obtain containing the brine electrolysis of permanganic acid as oxygenant.Chloride ion is contained in rivers and creeks water conventionally, and manganese is contained in underground water, therefore, and can be by condensed water electrolysis be generated to oxygenant.And, in the decomposition of the oxygenant generating by electrolysis contained biological hardly-degradable substance in condensed water, be consumed.In water treatment method of the present invention, solute treatment system internal recycle (that is, circulating), therefore between pre-treatment groove, biological treating tank, concentrated mechanism, oxygenation machanism, by condensed water electrolysis is generated to oxygenant, can suppress solute concentration and rise.
The oxygenolysis water obtaining in oxide treatment operation is returned to and in pre-treatment groove, contacts (foldback operation) with processed water., be communicated with oxygenation machanism and be provided with the foldback path for the treatment of trough conveying oxidation water of decomposition forward.In oxygenolysis water, remain the oxidizing substance of oxide compound that add or that be derived from generation in oxide treatment operation, therefore, by being returned in pre-treatment groove, oxygenolysis water contacts with processed water, oxidizing substance reacts with processed water, biological hardly-degradable substance contained in processed water carries out oxygenolysis, can convert biological easily decomposability material to.The easy decomposability material of biology converting to so is then carried out a biological disposal upon in biologic treatment process, thereby can reduce the COD concentration of the biological treatment of water obtaining.In addition, oxygenolysis water is not directly returned to biological reaction tank, can avoids thus the microorganism part under the effect of oxidizing substance in biological reaction tank to be killed.Therefore,, in oxide treatment operation, by carry out oxide treatment under severe condition to a certain degree, can improve the rate of decomposition of biological hardly-degradable substance contained in condensed water.
As oxidizing substance residual in oxygenolysis water, except the oxygenant using in oxide treatment operation, can enumerate hypochlorous acid and permanganic acid etc., hypochlorous acid and permanganic acid can generate by electrolysis as explained above like that, can certainly be by hypochlorite or permanganate are added and remained in oxygenolysis water as oxygenant.In addition, permanganic acid can generate by manganese and ozone reaction, also can generate by the combination of adding hydrogen peroxide and uviolizing.
Preferably in pre-treatment groove, in processed water (having added oxygenolysis water in processed water), supply with microvesicle., preferably in pre-treatment groove, possesses microbubble generator.Now, as long as from oxygen-containing gass such as microbubble generator air supplies.
Microbubble generator can use known device.As the method that produces microvesicle, these two kinds of methods are known below,, produce eddy current by current or mechanical stirring, utilize the eddy current producing by the biphase gas and liquid flow rotation mode of bubble segmentation or by making gas dissolving in processed water under pressurized state, reduce pressure afterwards, make to be dissolved in gas in processed water and regasify into the dissolved under pressure mode of microvesicle, adopt which kind of mode can.
With common bubble phase ratio, the bubble footpath of microvesicle is less, and in general, bubble footpath when generation is more than 1 μ m and below 100 μ m.Therefore, be supplied to microvesicle in processed water because lift velocity is slower than common bubble, therefore, the microvesicle in processed water, by naturally dissolving and dwindle, just disappears (damaging by pressure) soon.It is known that microvesicle produces the free radicals such as hydroxyl radical free radical in the time disappearing, and utilizes this free radical can decompose biological hardly-degradable substance contained in processed water.Now, oxidizing substance or collaborate with free radical and cause that accelerating oxidation reacts, or because of free radical passivation, thereby the reduction of accelerating oxidation material.That is, by supplying with microvesicle in the processed water to containing oxidizing substance, or promote the decomposition of processed water, or the reduction of contained oxidizing substance in accelerating oxidation water of decomposition.Consequently, in the biologic treatment process of back segment, can expect the raising of performance of carrying out a biological disposal upon, or carry out a biological disposal upon aptly.
Then, with reference to accompanying drawing, the configuration example of water treatment method of the present invention and water treatment system is described.It should be noted that, the present invention is not limited to the embodiment shown in accompanying drawing.
Fig. 2 shows the first embodiment of water treatment system of the present invention.Water treatment system shown in Fig. 2 has: imported the pre-treatment groove 11 of processed water 1, pre-treatment water 2 that in the past treatment trough 11 flows out carrying path 16, the biological reaction tank 21 being communicated with the carrying path 16 of pre-treatment water 2, imported the biological treatment of water 3 flowing out from biological reaction tank 21, improve the solute concentration of biological treatment of water 3 and obtain the concentrated mechanism 31 of condensed water 6, to condensed water 6 carry out oxide treatment and obtain the oxygenation machanism 51,52 of oxygenolysis water 7 and forward treatment trough 11 carry the foldback path 54 of oxidation water of decomposition 7.In the water treatment system shown in Fig. 2, be provided with reverse osmosis membrane apparatus as concentrated mechanism 31, the hydrogen-catalyst reactor 51 that is provided with oxygenant feed unit 52 and possesses oxide catalyst is as oxygenation machanism 51,52.In addition, be communicated with and be provided with regulating tank 25 with biological reaction tank 21 and concentrated mechanism 31, in addition, in the carrying path 32 of condensed water 6, be also provided with regulating tank 33.
First processed water 1 is imported into pre-treatment groove 11, and then, the pre-treatment water 2 that treatment trough 11 flows out is in the past imported into biological reaction tank 21.Biological reaction tank 21 has the aerobic slot 21a that possesses loose device of air 22, in biological reaction tank 21, pre-treatment water 2 is carried out a biological disposal upon and is obtained biological treatment of water 3.Biological treatment of water 3 is imported into regulating tank 25 from biological reaction tank 21 overflows, and a part that is directed into the biological treatment of water 3 of regulating tank 25 is discharged to outside system as processing water 4, and rest part is supplied to reverse osmosis membrane apparatus 31.Reverse osmosis membrane apparatus 31 clips semi-permeable membranes and has primary side and secondary side, biological treatment of water 3 is imported into the primary side of reverse osmosis membrane apparatus 31, by primary side is pressurizeed, water contained in biological treatment of water 3 permeates to secondary side from the primary side of semi-permeable membranes, obtains condensed water 6.On the other hand, obtain the Separation of Water 5 of high purification from the secondary side of reverse osmosis membrane apparatus 31.The condensed water 6 flowing out from the primary side of reverse osmosis membrane apparatus 31 is carried by carrying path 32, is fed to hydrogen-catalyst reactor 51.In hydrogen-catalyst reactor 51, supply with oxygenant (for example, hypochlorous acid or hydrogen peroxide) by oxygenant feed mechanism 52, it under existing, oxide catalyst is contacted with condensed water 6, thus, the COD in condensed water 6 decomposes and BODization, obtains oxygenolysis water 7.Oxygenolysis water 7 is returned to pre-treatment groove 11 by foldback path 54, contacts with processed water 1.Thus, the oxidizing substance remaining in oxygenolysis water 7 is reduced by processed water 1, has suppressed its detrimentally affect to the biological treatment in biological treating tank 21.In addition, by remaining in the oxidizing substance in oxygenolysis water 7, therefore oxygenolysis can also expect that the COD concentration of the biological treatment of water 3 flowing out from biological treating tank 21 reduces to a part for processed water 1.It should be noted that, in the first embodiment, also can replace reverse osmosis membrane apparatus 31 with nano filter membrance device.
Fig. 3 shows the second embodiment of water treatment system of the present invention.The difference of the water treatment system of the water treatment system of the second embodiment and the first embodiment is: in pre-treatment groove, be provided with microbubble generator; Form biological reaction tank by anaerobism groove and aerobic slot, in aerobic slot, be provided with membrane separation unit.It should be noted that, in following explanation, omit the explanation of the part repeating with the explanation of the first embodiment.
Water treatment system shown in Fig. 3 is provided with microbubble generator 12 in pre-treatment groove 11.Microbubble generator 12 dippings are arranged in pre-treatment groove 11, and air leading-in conduit 15 is connected with microbubble generator 12, and the circulation stream 13 that possesses pump 14 is communicated with setting with pre-treatment groove 11 and microbubble generator 12.Supply with the trough inner water of pre-treatment groove 11 to microbubble generator 12 by circulation stream 13, import air from air leading-in conduit 15 to microbubble generator 12, consequently, air is sheared and miniaturization in microbubble generator 12, forward air fed microvesicle in the trough inner water in treatment trough 11.
In the water treatment system shown in Fig. 3, oxygenolysis water 7 is fed to pre-treatment groove 11 together with processed water 1, by supplying with wherein microvesicle, promote the decomposition of processed water 1, or promote the reduction of oxidizing substance contained in oxygenolysis water 7, consequently, in biological treating tank 21, can expect the raising of performance of carrying out a biological disposal upon, or carry out a biological disposal upon aptly.
For the water treatment system shown in Fig. 3, biological reaction tank 21 is made up of anaerobism groove 21b and aerobic slot 21a.In the past first the pre-treatment water 2 that treatment trough 11 flows out be fed to the anaerobism groove 21b of biological reaction tank 21, is fed to afterwards aerobic slot 21a, and in the groove of aerobic slot 21a, mud is returned to anaerobism groove 21b.Like this, circulate between aerobic slot 21a and anaerobism groove 21b by the mud (microorganism) that makes biological reaction tank 21, rectified phosphorus and accumulated the breeding environment of bacterium, the phosphorus in pre-treatment water 2 is accumulated at phosphorus under the effect of bacterium and is highly removed.Now, phosphorus is accumulated bacterium and in anaerobism groove 21b, is absorbed the BOD in pre-treatment water 2 and breed, and therefore, in pre-treatment groove 11, processed water 1 contacts and BODization with oxygenolysis water 7, and thus, this BOD is effectively used to removing of phosphorus in biological reaction tank 21.
It should be noted that, accumulate bacterium by phosphorus and in biological reaction tank 21, carry out phosphorus remove in the situation that, as shown in Figure 3, in pre-treatment groove 11, supply with microvesicle to processed water 1, or carry out aeration, can keep to heavens phosphorus in biological reaction tank 21 to accumulate the effect of bacterium.In this situation, in pre-treatment groove 11, the lower fatty acid in processed water 1 is decomposed by biology, consequently, can keep to heavens phosphorus to accumulate the phosphorus picked-up ability of bacterium in biological reaction tank 21.
Water treatment system shown in Fig. 3 is also provided with membrane separation unit 23 in biological reaction tank 21.In Fig. 3, membrane separation unit 23 dippings are arranged in trough inner water 4.Membrane separation unit 23, by taking out side with pump suction filtrate, can obtain membrane filtration water as biological treatment of water 3, is fed to concentrated mechanism's (reverse osmosis membrane apparatus) 31 from the membrane filtration water of membrane separation unit 23.By membrane separation unit 23, the trough inner water of biological reaction tank 21 is carried out to solid-liquid separation like this, obtain biological treatment of water 3, thus, can highly have been reduced the biological treatment of water 3 of solid component concentration.In addition, by reducing the solid component concentration of biological treatment of water 3, be easy to concentrate aptly the oxide treatment in the concentrated or oxygenation machanism (hydrogen-catalyst reactor) 51 in mechanism's (reverse osmosis membrane apparatus) 31.
Membrane separation unit 23 dippings are arranged in the situation in trough inner water, and membrane separation unit 23 is preferably located in aerobic slot 21a.Now, by loose device of air 22 is set below membrane separation unit 23, be easy to effects on surface and carry out cross-flow cleaning, easily carry out aptly membrane separation.
Fig. 4 shows the 3rd embodiment of water treatment system of the present invention.The difference of the water treatment system of the water treatment system of the 3rd embodiment and the second embodiment is: formed biological reaction tank, in the carrying path of condensed water, be provided with electrolyzer by aerobic slot.It should be noted that, in following explanation, omit the explanation of part and the explanation of biological reaction tank that repeat with the explanation of the second embodiment.
In the water treatment system shown in Fig. 4, in the carrying path 32 of condensed water 6, be provided with electrolyzer 53.By with electrolyzer 53, condensed water 6 being carried out to electrolysis, can generate oxygenant, the oxygenant generating like this can replace the oxygenant using in oxygenation machanism (hydrogen-catalyst reactor) 51.In Fig. 4, be connected and be provided with oxygenant feed mechanism 52 with hydrogen-catalyst reactor 51, but in the water treatment system shown in Fig. 4, oxygenant feed mechanism 52 also can be set.
Fig. 5 shows the 4th embodiment of water treatment system of the present invention.The difference of the water treatment system of the water treatment system of the 4th embodiment and the first embodiment is: in pre-treatment groove, be provided with microbubble generator; Be communicated with thickener is set with biological reaction tank, concentrated mechanism and equipment for separating liquid from solid are set in thickener, the membrane filtration water supply from equipment for separating liquid from solid is arrived to oxygenation machanism.It should be noted that, in following explanation, omit the explanation of part and the explanation of microbubble generator that repeat with the explanation of the first embodiment.
In the water treatment system shown in Fig. 5, be communicated with thickener 41 is set with biological reaction tank 21, the biological treatment of water 3 flowing out from biological reaction tank 21 is fed to thickener 41.In thickener 41, dipping arranges concentrated mechanism 43, and dipping is provided with membrane separation unit 50, obtains as condensed water 6 from the membrane filtration water of membrane separation unit 50.
In the water treatment system shown in Fig. 5, be provided with forward osmosis membrane device as concentrated mechanism 43.In thickener 41, below forward osmosis membrane device 43 and membrane separation unit 50, be provided with loose device of air 42, to clean film surface separately by loose device of air 42 transverse flow.Forward osmosis membrane device 43 clips semi-permeable membranes and has primary side and secondary side, and biological treatment of water 3 is fed to the primary side of forward osmosis membrane device 43, imports the osmotic pressure hypertonic solution 49 higher than biological treatment of water 3 at secondary side.In forward osmosis membrane device 43, utilize the osmotic pressure official post water of biological treatment of water 3 and hypertonic solution 49 to permeate to secondary side from primary side, thus, biological treatment of water 3 is concentrated, by concentrated like this biological treatment of water 3 being carried out in membrane separation unit 50 to solid-liquid separation, obtain condensed water 6.Condensed water 6 is fed to oxygenation machanism (hydrogen-catalyst reactor) 51 by carrying path 32.In addition, a part for condensed water 6 also can be used as process water 4 be discharged to outside system.
In the water treatment system shown in Fig. 5, for recycle hypertonic solution 49, take out Separation of Water 5 from hypertonic solution 49, be also provided with reverse osmosis membrane apparatus 44.Reverse osmosis membrane apparatus 44 clips semi-permeable membranes and has primary side and secondary side, be communicated with and be provided with the first stream 45 with the secondary side outflow portion of semi-permeable membranes of forward osmosis membrane device 43 and the primary side inflow portion of the semi-permeable membranes of reverse osmosis membrane apparatus 44, be communicated with and be provided with the second stream 46 with the primary side outflow portion of semi-permeable membranes of reverse osmosis membrane apparatus 44 and the secondary side inflow portion of the semi-permeable membranes of forward osmosis membrane device 43.The hypertonic solution 49 flowing out from the secondary side of forward osmosis membrane device 43 is transported to the primary side of reverse osmosis membrane apparatus 44 by the first stream 45.In reverse osmosis membrane apparatus 44, hypertonic solution 49 is present in the primary side of semi-permeable membranes, and the osmotic pressure Separation of Water 5 lower than hypertonic solution 49 is present in the secondary side of semi-permeable membranes.In reverse osmosis membrane apparatus 44, by the primary side pressurization to semi-permeable membranes, make the water in hypertonic solution 49 obtain Separation of Water 5 from the primary side of semi-permeable membranes to secondary side infiltration.Consequently, the water in hypertonic solution 49 is removed in reverse osmosis membrane apparatus 44, has improved solute concentration.Solute concentration improves and the hypertonic solution 49 that flows out from the primary side of the semi-permeable membranes of reverse osmosis membrane apparatus 44 is transported to the secondary side of the semi-permeable membranes of forward osmosis membrane device 43 by the second stream 46.; in forward osmosis membrane device 43; the water infiltration of biological treatment of water 3; hypertonic solution 49 is diluted; the hypertonic solution 49 flowing out from forward osmosis membrane device 43 is fed to reverse osmosis membrane apparatus 44; thus, solute concentration improves, and the hypertonic solution 49 that has improved solute concentration is returned to forward osmosis membrane device 43 from reverse osmosis membrane apparatus 44.
It should be noted that, preferably, in the first stream 45, regulating tank 47 is set, in the second stream 46, regulating tank 48 is set.So,, by regulating tank 47,48 is set, make forward osmosis membrane processing and reverse osmosis membrane processing separate, to stably carry out each processing.In addition, in regulating tank 48, in order to regulate the solute concentration of the hypertonic solution 49 that is returned to forward osmosis membrane device 43, preferably possess solute and add mechanism.
In the water treatment system shown in Fig. 5, by hypertonic solution 49 is circulated between forward osmosis membrane device 43 and reverse osmosis membrane apparatus 44, the solute concentration of the hypertonic solution 49 that is supplied to forward osmosis membrane device 43 can be remained on to desired degree well, thereby stably carry out positive osmotic treated.In addition, hypertonic solution 49 circulates in the closed system between forward osmosis membrane device 43 and reverse osmosis membrane apparatus 44 substantially, therefore prevented sneaking into of impurity etc., without the pre-treatment that utilizes microfiltration membrane (MF film), ultra-filtration membrane (UF film) or gac etc., can carry out more easily reverse osmosis processing.
Fig. 6 shows the 5th embodiment of water treatment system of the present invention.The water treatment system difference of the water treatment system of the 5th embodiment and the 3rd embodiment is: concentrated mechanism is located to biological reaction tank, the membrane filtration water from equipment for separating liquid from solid is directly supplied to oxygenation machanism.It should be noted that, in following explanation, omit the explanation of the part repeating with the explanation of the 3rd embodiment.
In the water treatment system shown in Fig. 6, in biological reaction tank 21, dipping is provided with membrane separation unit 23, and dipping is provided with concentrated mechanism 43, obtains as condensed water 6 from the membrane filtration water of membrane separation unit 23.The pre-treatment water 2 importing in biological reaction tank 21 is carried out a biological disposal upon in biological reaction tank 21, thus, obtain biological treatment of water 3, biological treatment of water 3 is concentrated and in membrane separation unit 23, carries out solid-liquid separation in concentrated mechanism 43, thus, obtain condensed water 6.In the water treatment system shown in Fig. 6, forward osmosis membrane device is set as concentrated mechanism 43.Forward osmosis membrane device and auxiliary facility thereof are identical with above-mentioned explanation.Condensed water 6 is fed to oxygenation machanism (hydrogen-catalyst reactor) 51 by carrying path 32.In addition, a part for condensed water 6 also can be used as process water 4 be discharged to outside system.In the water treatment system shown in Fig. 6, can carry out compact system constructing.
Industrial applicibility
The present invention can be used in the draining from factories such as ironmaking, iron and steel, non-ferrous metal, machinery, metal processing, plating, application, cement, oil; From the draining of food factories or paper mill etc.; Landfill leaches water; Sewage; Movement; Livestock excrement; The processing of kitchen drainage etc.
Claims (12)
1. a water treatment method, the method has following operation:
Processed water is imported to the operation of pre-treatment groove;
The pre-treatment water importing biological reaction tank going out from described pre-treatment concentrated flow is obtained to the operation of biological treatment of water;
By concentrated mechanism, described biological treatment of water is concentrated, obtain the operation of condensed water;
Described condensed water is carried out oxide treatment and obtained the operation of oxygenolysis water; And
The operation that described oxygenolysis water is returned to described pre-treatment groove and it is contacted with described processed water.
2. water treatment method according to claim 1, wherein, in described pre-treatment groove, supplies with microvesicle to processed water.
3. water treatment method according to claim 1 and 2, wherein, described concentrated mechanism possesses semi-permeable membranes.
4. according to the water treatment method described in any one in claim 1～3, wherein, by membrane separation unit, the trough inner water of described biological reaction tank is carried out to solid-liquid separation, obtain described biological treatment of water.
5. according to the water treatment method described in any one in claim 1～4, wherein, also there is the operation of described condensed water being carried out to electrolysis and obtain brine electrolysis,
Described brine electrolysis is carried out to oxide treatment and obtains described oxygenolysis water.
6. according to the water treatment method described in any one in claim 1～5, wherein, by making described condensed water contact with oxide catalyst and carry out oxide treatment, obtain described oxygenolysis water under oxygenant coexists.
7. a water treatment system, it has:
Import the pre-treatment groove of processed water;
The carrying path of the pre-treatment water going out from described pre-treatment concentrated flow;
The biological reaction tank being communicated with the carrying path of described pre-treatment water;
Import the biological treatment of water flowing out from described biological reaction tank, improve the solute concentration of this biological treatment of water and obtain the concentrated mechanism of condensed water; And
Described condensed water is carried out oxide treatment and is obtained the oxygenation machanism of oxygenolysis water,
Wherein, be provided with described oxygenolysis water is delivered to the foldback path in described pre-treatment groove.
8. water treatment system according to claim 7 wherein, possesses microbubble generator from microvesicle to processed water that supply with in described pre-treatment groove.
9. according to the water treatment system described in claim 7 or 8, wherein, described concentrated mechanism possesses semi-permeable membranes.
10. according to the water treatment system described in any one in claim 7～9, wherein, in described biological reaction tank, be provided with membrane separation unit, be imported into described concentrated mechanism from the membrane filtration water of membrane separation unit.
11. according to the water treatment system described in any one in claim 7～10, wherein, is provided with the electrolyzer of condensed water described in electrolysis in the carrying path of described condensed water.
12. according to the water treatment system described in any one in claim 7～11, wherein, as described oxygenation machanism, is provided with oxygenant feed mechanism and the hydrogen-catalyst reactor that possesses oxide catalyst.
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| CN108409045A (en) * | 2018-04-12 | 2018-08-17 | 广东雅迪环保设备有限公司 | The garbage leachate treatment process and its processing system of efficient biochemical low amounts enrichment |
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| JP7130280B1 (en) | 2021-07-06 | 2022-09-05 | テラル株式会社 | Kitchen wastewater treatment system |
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