CN102863083A - Nitrating apparatus and waste water processing apparatus with same - Google Patents
Nitrating apparatus and waste water processing apparatus with same Download PDFInfo
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- CN102863083A CN102863083A CN2012102242330A CN201210224233A CN102863083A CN 102863083 A CN102863083 A CN 102863083A CN 2012102242330 A CN2012102242330 A CN 2012102242330A CN 201210224233 A CN201210224233 A CN 201210224233A CN 102863083 A CN102863083 A CN 102863083A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/08—Aerobic processes using moving contact bodies
- C02F3/085—Fluidized beds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/101—Arranged-type packing, e.g. stacks, arrays
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The present invention relates to a nitrating apparatus and a waste water processing apparatus with the same, which fully uses a fixed carrier, is high in nitrating processing efficiency, can greatly inhibit operation cost and equipment investment cost, and can be easily guided into established waste water processing plants without an original sedimentation basin. The nitrating apparatus (10) performs nitrating processing on ammoniacal nitrogen in waste water to form nitrate nitrogen through using nitrifying bacteria under an aerobic codition, and at least is provided with a series of sludge/carrier nitrating circuits (58), the circuits (58) comprise a sludge nitrating groove (12) into which the waste water flows, wherein the ammoniacal nitrogen is nitrated through active sludge (18) containing the nitrifying bacteria; a solid-liquid separating groove (14) separating solid components in the waste water to obtain upper clear water through using the sludge and performing nitrating processing in the nitrating groove (12); a carrier nitrating groove (16) into which the upper clear water flows, wherein the carrier nitrating groove comprises a carrier separating screen fixedly provided with a fixed carrier (30) and a fixed nitrifying bacteria and performs nitrating processing on the ammoniacal nitrogen residual in the upper clear water to finally obtain a nitrating processing water.
Description
Technical field
The present invention relates to a kind of nitrated device and wastewater treatment equipment, while particularly a kind of constructing especially for the technology that suppresses running cost and equipment cost and obtain the nitrated device of high nitration treatment efficient.
Background technology
As the wastewater treatment equipment that from the waste water that contains ammonium-nitrogen (ammoniacal nitrogen), removes denitrification, the present known active sludge circulation political reform (Cyclic Activated Sludge System) that has.Active sludge circulation political reform is delivered to waste water the nitrifying groove of aerobism for using the treatment process of active sludge via anaerobic denitrifying tank, utilize the nitrifier in the active sludge that ammonium-nitrogen nitrated (oxidation) is become nitrate ammonia in this nitrifying groove.Then, the part of nitrated nitrify water is back to denitrifying tank and utilizes the denitrifier the active sludge to convert nitrate ammonia to nitrogen from nitrifying groove.In addition, the remainder that carries out the processing water of nitration treatment by nitrifying groove is banished out via final tank.
But, utilize the nitration treatment of active sludge in nitrifying groove, nitrifier can't be maintained high density, therefore, existence can't be carried out high loaded process, the inefficient problem of nitration treatment.Therefore, in recent years, carried out in nitrifying groove, dropping into the nitrated promoted type circulation political reform (for example patent documentation 1) of carrier of nitrifier that comprised immobilization.For this nitrated promoted type circulation political reform, as shown in figure 14, basic comprising is identical with active sludge circulation political reform, there is the nitrifying groove 1 that comprises fixation support 4 to carry out nitrated nitrify water by input and carries out denitrogenation processing by denitrifying tank 2, process water and undertaken being banished out after the solid-liquid separation by final tank 3.But, in comprising the nitrifying groove 1 of fixation support 4, input is provided with the carrier separation sieve 5 that prevents that carrier from flowing out, and therefore, in the leading portion that the former water of waste water flows into, the inclusion etc. that needs to be used for to remove waste water stops up the initial settling tank 6 of material.At this moment, in order to improve the Nitrification that comprises fixation support, preferably reduce diameter of carrier (for example about 3mm) and increase specific surface area, flow into from nitrifying groove 1 in order not make this carrier 4, needing the mesh width is carrier separation sieve 5 about 1.5 ~ 2mm.At this moment, increase the sieve aperture of carrier separation sieve 5 and when inclusion can not stopped up, also have to increase the size of carrier, therefore, aforesaid nitration treatment Efficiency Decreasing.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2008-012383 communique
Summary of the invention
The problem that invention will solve
Like this, use the nitrated device of " comprising fixation support " to compare with the nitrated device that uses active sludge, can obtain high nitration treatment efficient, but have the problem points shown in following.
(1) need to buy the expense that comprises fixation support.In addition, when the interpolation quantitative change of carrier is many, has the shortcoming that the oxygen dissolved efficiency reduces, the aeration quantitative change is many.
The inclusion etc. that (2) need to be used for removing waste water at the leading portion of nitrated device stops up the solid-liquid separation tank (for example initial settling tank) of material, but in the situation that easy facture does not have initial settling tank etc. sometimes yet.Therefore, comprise the nitrated device of fixation support for setup and use, initial settling tank etc. need to be set and remove inclusion, equipment cost uprises, and needs simultaneously to guarantee the land used for initial settling tank.
The present invention finishes in view of such situation, therefore, its purpose is, a kind of nitrated device is provided and has the wastewater treatment equipment of this nitrated device, it can fully apply flexibly the high nitration treatment efficient that obtains by " comprising fixation support ", do one's utmost simultaneously to suppress running cost and equipment investment cost, and can easily import the waste water treatment plant that has established with initial settling tank.
Solve the means of problem
Nitrated device of the present invention is finished to achieve these goals, it is characterized in that, utilizing nitrifier under the aerobism condition, the ammonium-nitrogen in the waste water to be carried out nitration treatment and forming in the nitrated device of nitrate ammonia, at least possesses the nitrated circuit of 1 serial mud/carrier, the nitrated circuit of described mud/carrier has: the mud nitrifying groove, wherein, described waste water flows into and utilizes the active sludge that contains described nitrifier to carry out nitrated to described ammonium-nitrogen; Solid-liquid separation tank wherein, carries out solid-liquid separation to the solids component in the nitration treatment water that is produced by active sludge that carries out nitration treatment by described mud with nitrifying groove and obtains supernatant water; The carrier nitrifying groove, wherein, described supernatant water flows into and utilizes and comprises that the fixation support that comprises that is fixed with described nitrifier carries out nitrated to ammonium-nitrogen residual in the described supernatant water and obtains final nitration treatment water, is provided with the described carrier separation sieve that comprises fixation support simultaneously.
Be explained, " comprising fixing (having) nitrifier " comprises following two kinds of situations: comprise the situation and the situation that comprises the active sludge that fixedly contains nitrifier of fixing through the nitrifier of pure culture.In addition, if not otherwise specified, waste water is not synthetic wastewater, therefore, except ammonium-nitrogen, contains inclusion and/or BOD and become to grade in waste water.
The inventor is nitrated and utilize in nitrifying groove at carrier and to comprise nitrated the sharing of carrier that fixation support carries out with the mud that utilizes active sludge to carry out in the nitrifying groove by the ammonium-nitrogen in the waste water nitrated being used in mud, obtains following opinion: also can obtain high nitration treatment efficient with the residence time of nitrifying groove and minimizing carrier with the capacity of nitrifying groove even shorten mud.
According to nitrated device of the present invention, for the nitration treatment of the ammonium-nitrogen in the waste water, in the mud nitrifying groove, utilize the active sludge contain nitrifier to carry out mud nitrated, obtain removing by solid-liquid separation tank the supernatant water of solid matter.Then, nitrated by comprising that " comprising fixation support " of being fixed with nitrifier carried out carrier to this supernatant water in nitrifying groove at carrier.
Thus, and by the nitrifying groove that comprises fixation support whole waste water is carried out nitrated situation and compare, can significantly reduce the usage quantity that comprises fixation support, also can cut down aeration rate simultaneously, therefore, can reduce the operational outfit cost.In addition, can reduce carrier and make its miniaturization with the capacity of nitrifying groove, simultaneously, owing to having solid-liquid separation tank at carrier with the leading portion of nitrifying groove, therefore, carrier can not stopped up by obstruction materials such as the inclusiones in the waste water with the carrier separation sieve of nitrifying groove yet, and running management also transfiguration is easy.
More preferably, as described in the prior art, in the waste water treatment plant that has established, have mud nitrifying groove and solid-liquid separation tank (final tank), therefore, as long as only newly establish the carrier nitrifying groove at the back segment of solid-liquid separation tank, just can consist of nitrated device of the present invention, also can easily import waste water treatment plant and the equipment cost of having established and become cheap.
In nitrated device of the present invention, preferably possess: the bypass pipe arrangement, walk around described carrier and make described supernatant water be bypassed to the processing water pipe arrangement of described nitration treatment water with nitrifying groove; Nitrogen concentration is measured meter, and the ammonium-nitrogen concentration of described supernatant water and/or described nitration treatment water is measured; The supernatant water divider is dispensed to described carrier nitrifying groove and described bypass pipe arrangement with described supernatant water; Control device is controlled described supernatant water divider based on the measurement result of described concentration determination meter, adjusts with the supernatant water sendout of nitrifying groove and described bypass pipe arrangement being dispensed to described carrier.
Be explained, the carrier that utilizes the supernatant water divider comprises also that with the partition rate of nitrifying groove and described bypass pipe arrangement a side is 100% situation.
By consisting of like this, even there are the change, the change of wastewater flow etc. of water temperature of change, the waste water of the ammonium-nitrogen concentration in the waste water, also can flow to carrier by control and carry out carrier with the load adjustment in the nitrifying groove (for example reducing load) with the sendout of the supernatant water of nitrifying groove and bypass pipe arrangement.
Thus, not only can obtain certain nitration treatment water of conforming to water quality standard, nor therefore the carrier nitrifying groove that can excessively turn round, can turn round more effectively.
At this moment, more preferably possess: the nitrated circuit of mud is set up in parallel with the nitrated circuit of described mud/carrier and is made of with nitrifying groove and described solid-liquid separation tank described mud; The waste water divider is dispensed to the nitrated circuit of described mud/carrier and the nitrated circuit of described mud with described waste water; The Wastewater Determination meter is measured the water quality of described waste water; Control device is controlled described waste water divider based on the measurement result of described Wastewater Determination meter, and the sendout of the waste water that is dispensed to the nitrated circuit of described mud/carrier and the nitrated circuit of described mud is adjusted; The interflow pipe arrangement makes the supernatant water interflow of the nitrated circuit of described mud/carrier and the nitrated circuit of described mud and imports the carrier nitrifying groove of the nitrated circuit of described mud/carrier.
Be explained, utilize the nitrated circuit of mud/carrier of waste water divider and the partition rate of the nitrated circuit of mud to comprise that also a side is 100% situation.
Thus, can be according to the water quality of waste water (for example, ammonium-nitrogen concentration, water temperature, the water yield) put on mud with the adjustment (for example lightening the load) of the load of nitrifying groove, therefore, can more effectively obtain the certain nitration treatment water that conforms to the water quality benchmark.
At this moment, described carrier more preferably is set and replaces described bypass pipe arrangement with nitrifying groove.Thus, can according to the water quality (for example, ammonium-nitrogen concentration, water temperature, the water yield) of waste water, carry out the nitrated load adjustment of carrier by two carriers with nitrifying groove.Thus, compare with the situation that the bypass pipe arrangement is set, make flexible raising.Therefore, mud can be carried out with nitrifying groove and carrier both load adjustments of nitrifying groove, therefore, the certain nitration treatment water that conforms to the water quality benchmark can be more effectively obtained.
In nitrated device of the present invention, preferably possess: the nitrated circuit of mud is set up in parallel with the nitrated circuit of described mud/carrier and is made of with nitrifying groove and described solid-liquid separation tank described mud; The Wastewater Determination meter is measured the water quality of described waste water; The circuit selecting arrangement carries out the circuit of the nitrated circuit of described mud/carrier and the nitrated circuit of described mud and selects; Control device is controlled described circuit selecting arrangement based on the measurement result of described Wastewater Determination meter, selects used circuit in the nitrated circuit of described mud/carrier and the nitrated circuit of described mud.
It is for according to the water quality of waste water (for example being used for, ammonium-nitrogen concentration, water temperature, the water yield) carry out mud with nitrifying groove and the carrier alternate manner with the load adjustment of nitrifying groove, can select to have carrier with the nitrated circuit of the mud/carrier of nitrifying groove and not have carrier with the circuit that uses in the nitrated circuit of the mud of nitrifying groove.
Thus, mud can be carried out with nitrifying groove and carrier both load adjustments of nitrifying groove, therefore, the certain nitration treatment water that conforms to the water quality benchmark can be more effectively obtained.
In nitrated device of the present invention, use in the nitrifying groove at described carrier, the described fixation support that comprises preferably is filled in described carrier nitrifying groove under the state that can fluidly be accommodated in the container that is formed with a plurality of limbers, described limbers comprises the intransitable size of fixation support for this.
Thus, the air aeration for aerobism flows in the groove by being used for making with the nitrifying groove inner jar at carrier, and then comprises that fixation support is mobile in container.By this dual flowing, comprise that the contact efficiency of fixation support and waste water improves, can improve the nitration treatment efficient in the carrier usefulness nitrifying groove.At this moment, be provided with solid-liquid separation tank at carrier with the leading portion of nitrifying groove, remove the obstruction material that the limbers that makes container is stopped up, therefore, also can not stop up even the limbers diminishes.Thus, can be accommodated in the container by the fixation support that comprise diameter of carrier is little and that nitrification efficiency is good.
And then, compare with the situation of not using container (will comprise that fixation support directly drops into carrier with the situation of nitrifying groove), can increase the mesh width of carrier separation sieve, therefore, can simplify the carrier separation sieve, such as using commercially available wire cloth or stamped metal etc.
Wastewater treatment equipment of the present invention is finished in order to realize described purpose, it is characterized in that, possess: each described nitrated device and denitrifying tank in first aspect present invention ~ the 7th aspect, described denitrifying tank utilize denitrifier under the anaerobism condition nitrate ammonia in the nitration treatment water that has carried out nitration treatment by described nitrated device to be carried out denitrogenation processing to make it convert nitrogen to.
The present invention consists of with the form of the wastewater treatment equipment that is assembled into nitrated device of the present invention, removes nitrate ammonia in the nitration treatment water of processing by nitrated device with the form of nitrogen by denitrifying tank.
In wastewater treatment equipment of the present invention, described denitrifying tank is preferably disposed on the leading portion of described nitrated device and the part of the final nitration treatment water processed with nitrifying groove by described carrier is circulated to described denitrifying tank via the circulation pipe arrangement.
By denitrifying tank being configured in the leading portion of nitrated device, can effectively use organism in the waste water as the nutrition source of denitrifier.
In wastewater treatment equipment of the present invention, except described denitrifying tank, preferably the back segment setting at described nitrated device contains the assisting nitrogen groove that comprises fixation support, residual nitrate ammonia converts nitrogen to by described assisting nitrogen groove in the remainder of the final nitration treatment water that will process with nitrifying groove by described carrier, describedly comprises that fixation support comprises and is fixed with described denitrifier.
Because residual in the final nitration treatment water of processing with nitrifying groove by carrier have a small amount of nitrate ammonia, therefore, can convert reliably nitrogen to by the assisting nitrogen groove.
The invention effect
Such as described above, according to nitrated device of the present invention and have the wastewater treatment equipment of this nitrated device, can fully apply flexibly the high nitration treatment efficient by comprising that fixation support obtains, do one's utmost simultaneously to suppress running cost and equipment investment cost, and can easily import the waste water treatment plant that has established with initial settling tank.
Description of drawings
Fig. 1 is the basic comprising figure of nitrated device of the present invention;
Fig. 2 is that the fixation support that comprises that will be accommodated in the container is filled in the explanatory view in the carrier usefulness nitrifying groove;
Fig. 3 is the explanatory view that the first embodiment to nitrated device of the present invention describes;
Fig. 4 is the explanatory view that the second embodiment to nitrated device of the present invention describes;
Fig. 5 is the explanatory view that the 3rd embodiment to nitrated device of the present invention describes;
Fig. 6 is the explanatory view that the 4th embodiment to nitrated device of the present invention describes;
Fig. 7 is the explanatory view of wastewater treatment equipment that is assembled into the nitrated device of basic comprising;
Fig. 8 is the explanatory view of wastewater treatment equipment that is assembled into the nitrated device of the first embodiment;
Fig. 9 is the explanatory view of wastewater treatment equipment that is assembled into the nitrated device of the second embodiment;
Figure 10 is the explanatory view of wastewater treatment equipment that is assembled into the nitrated device of the 3rd embodiment;
Figure 11 is the explanatory view of wastewater treatment equipment that is assembled into the nitrated device of the 4th embodiment;
Figure 12 is the explanatory view that is provided with the wastewater treatment equipment of denitrifying tank after carrier is with nitrifying groove;
Figure 13 is the chart that uses the embodiment of nitrated device of the present invention;
Figure 14 is the explanatory view of nitrated promoted type circulation political reform in the past.
Nomenclature
10 ... nitrated device, 12 ... the mud nitrifying groove, 14 ... solid-liquid separation tank, 16 ... the carrier nitrifying groove, 18 ... active sludge, 20 ... aeration tube, 22 ... gas blower, 24 ... mud is discharged pipe arrangement, 26 ... the sludge reflux pipe arrangement, 30 ... comprise fixation support, 31 ... the limbers, 32 ... aeration tube, 33 ... container, 34 ... gas blower, 35 ... cutting part, 36 ... the carrier separation sieve, 38 ... process the water pipe arrangement, 40 ... the bypass pipe arrangement, 42 ... the supernatant water divider, 44A ... the first concentration determination meter, 44B ... the second concentration determination meter, 46 ... control device, 50 ... the waste water divider, 52 ... branch's pipe arrangement, 54 ... water thermometer, 56 ... control device, 58 ... the nitrated circuit of mud/carrier, 60 ... the nitrated circuit of mud, 62A, 62B, 62C, 62D ... take-off pipe, 64 ... collecting fitting, 66 ... the circuit selecting arrangement, 68 ... control device, 70 ... wastewater treatment equipment, 72 ... denitrifying tank (active sludge), 74 ... the circulation pipe arrangement, 76 ... active sludge, 80 ... denitrifying tank (comprising fixation support)
Embodiment
Below, with reference to the accompanying drawings to nitrated device of the present invention and have preferred embodiment being elaborated of wastewater treatment equipment of this nitrated device.
[nitrated device]
(basic comprising)
Fig. 1 is the basic comprising figure of nitrated device 10 of the present invention.
As shown in Figure 1, nitrated device 10 of the present invention mainly is made of with nitrifying groove 16 with nitrifying groove 12, solid-liquid separation tank 14 and carrier mud.Be explained, in Fig. 1, omit mud is used the waste water between each groove of nitrifying groove 16 with nitrifying groove 12, solid-liquid separation tank 14 and carrier liquid feeding device.In addition, in Fig. 1, with mud with nitrifying groove 12, solid-liquid separation tank 14, and carrier illustrate with the independent groove of nitrifying groove 16 as separation, but also can form the one-piece construction that a groove is divided into 3 compartments.In addition, also mud can be divided into 2 with nitrifying groove 12 and solid-liquid separation tank 14 in a groove, only carrier be used nitrifying groove 16 as other independent groove.
The waste water that contains ammonium-nitrogen at first flows into mud nitrifying groove 12 via former water pipe arrangement 11.Be explained, in waste water, except ammonium-nitrogen, also contain inclusion and/or BOD and become to grade.
The active sludge 18 that contains nitrifier swims in the groove of mud with nitrifying groove 12, simultaneously disposes aeration tube 20 in the bottom of groove, and the air of sending from gas blower 22 is from aeration tube 20 aeration in groove.Thus, under the aerobism condition, the ammonium-nitrogen in the waste water is carried out mud by active sludge nitrated.
Be explained, construct in the situation of wastewater treatment equipment of the nitrated denitrogenation of carrying out ammonium-nitrogen waste water being assembled into nitrated device 10 of the present invention, as described later, preferred described formation is so that waste water flows into mud with nitrifying groove 12 via denitrifying tank.
Then, be sent to solid-liquid separation tank 14 through the nitrated mud nitrify water of mud at mud in nitrifying groove 12.In solid-liquid separation tank 14, make solids component in the mud nitrify water, particularly carry out sedimentation from mud with becoming entrained in the obstruction materials such as active sludge in the mud nitrify water or inclusion the nitrifying groove 12, carry out solid-liquid separation thus and obtain supernatant water.Fall to the active sludge of solid-liquid separation tank 14 bottoms and inclusion and discharge pipe arrangement 24 via mud a part of mud is discharged with the form of excess sludge, return denitrifying tank to wastewater treatment equipment described later via sludge reflux pipe arrangement 26 simultaneously.
Then, the supernatant water that obtains in solid-liquid separation tank 14 is sent to carrier nitrifying groove 16.Be filled with in the groove of carrier with nitrifying groove 16 be used to comprising fixedly a plurality of fixation supports 30 that comprise of nitrifier, dispose aeration tube 32 in the bottom of groove simultaneously, the air of sending from gas blower 34 is from aeration tube 32 aeration in groove.In addition, be provided with the outflow section of the nitration treatment water of nitrifying groove 16 at carrier and prevent the carrier separation sieve 36 that comprises that fixation support 30 is followed final nitration treatment water (being designated hereinafter simply as nitration treatment water) and flow out.Thus, under the aerobism condition to supernatant water in residual ammonium-nitrogen to carry out carrier nitrated, prevent from simultaneously comprising that fixation support 30 is entrained in the nitration treatment water and flows out.
Carry out the nitrated nitration treatment water of carrier is sent to wastewater treatment equipment described later via processing water pipe arrangement 38 denitrifying tank by carrier with nitrifying groove 16.
As shown in Figure 2, use in the nitrifying groove 16 at carrier, comprise under the fixation support 30 preferred states in can fluidly being accommodated in the container 33 that is formed with a plurality of limbers 31 being filled in carrier with in the nitrifying groove 16, described limbers 31 is the intransitable size of this carrier 30 as one kind.As the size of container 33, preferred diameter is in the scope of 50 ~ 150mm.Container 33 is by becoming segmentation of spheres two parts two hemisphere 33A, 33B to consist of, and hemisphere 33A, 33B are each other by chimeric at cutting part 35 or utilize thread groove to screw togather and integrated.The material of container 33 is not particularly limited, if but consider the easiness of processing, the proportion that can in groove, flow by the aeration air from aeration tube 32 etc., then be preferably plastics.And, the scope of taking in the proportion preferred 0.98 ~ 1.02 that comprises the container 33 under fixation support 30 states.The carrier 30 as one kind taken in is considered mobile, is made as the proportion that approaches with water namely 0.98 ~ 1.02, and than this scope hour, the emersion liquid level when larger than this scope, is settled down to bottom land, therefore, needs to be used for aeration power that it is flowed.Therefore, the proportion for container also is identical situation.
In addition, the rate of taking in that comprises fixation support 30 as being accommodated in container 33 preferably is made as the upper limit with 30% of container 33 internal volumes.Because when the rate of taking in surpasses 30%, hinder active the flowing that comprises fixation support 30 in the container 33.
Thus, with in the nitrifying groove 16, container 33 flows by the air from 32 aerations of aeration tube at carrier, and then comprises that fixation support 30 is container 33 interior flowing.By this dual flowing, comprise that the contact efficiency of fixation support 30 and waste water improves, can improve the nitration treatment efficient in the carrier usefulness nitrifying groove 16.
At this moment, be provided with solid-liquid separation tank 14 at carrier with the leading portion of nitrifying groove 16, remove the obstruction material that the limbers 31 that makes container 33 is stopped up, therefore, limbers 31 can not stopped up.Thus, comprise that fixation support 30 can take in to container 33 under diameter of carrier is the state of 2 ~ 5mm size, therefore, can guarantee the high Nitrification in the container 33.
And then, compare with the situation that does not have container 33, can increase the mesh width of carrier separation sieve 36, therefore, can simplify carrier separation sieve 36, such as using commercially available wire cloth or stamped metal etc.For example the size at container 33 is that diameter is in the situation of 100mm, as long as this big or small container 33 can not flow out, for example can use wire cloth or stamped metal with the square hole of 50 ~ 80mm.Thus, inclusion can not be attached on the carrier separation sieve 36 and stop up, therefore, its running management and Fig. 1 will comprise that fixation support 30 directly is filled in carrier with nitrifying groove 16 time carrier separation sieve 36 compare, become especially easy.
As mentioned above, in nitrated device 10 of the present invention, by the nitrated of the ammonium-nitrogen in the waste water shared with the carrier in the nitrifying groove 16 is nitrated with carrier by the mud in the nitrifying groove 12 is nitrated, can obtain many advantages as follows.
(A) also can obtain high nitration treatment efficient with the residence time of nitrifying groove 12 and minimizing carrier with the capacity of nitrifying groove 16 even shorten mud.Thus, in situation about comparing with identical processing water quality standard, with by the nitrifying groove that comprises fixation support whole waste water are carried out nitrated nitrated promoted type circulation political reform in the past and compare, although the residence time prolongs a little, but, compare with active sludge circulation political reform in the past, can be shortened to approximately half the residence time.And, compare with nitrated promoted type circulation political reform in the past, can significantly reduce the usage quantity that comprises fixation support, also can cut down aeration rate simultaneously.Thus, can reduce running cost, can reduce simultaneously carrier and make its miniaturization with the capacity of nitrifying groove.
By the way, in the situation that make active sludge 18 and comprise that fixation support 30 coexists as a groove and carries out nitration treatment, can't distinguish the Nitrification that comprises fixation support 30 and active sludge 18.Therefore, at design aspect, have in nitrifying groove, fill the excessive fixation support that comprises, therefore, need a large amount of fixation supports that comprises.
(B) in addition, by solid-liquid separation tank 14 being set with nitrifying groove 12 and carrier between with nitrifying groove 16 at mud, be not trace even do not have active sludge or exist in nitrifying groove 16 at carrier yet.Therefore, the proterties of supernatant water and clear water approaches, and compares with common active sludge, and the oxygen dissolved efficiency is high, therefore, can reduce the air aeration amount in the carrier usefulness nitrifying groove 16.
(C) have solid-liquid separation tank 14 at carrier with the leading portion of nitrifying groove 16, therefore, carrier also can not stopped up material by the inclusion in the waste water etc. with the carrier separation sieve 36 of nitrifying groove 16 and stop up.At this moment, as shown in Figure 2, take in to container 33 as long as will comprise fixation support 30, just can prevent the obstruction of formed limbers 31 in the container 33, and can increase the mesh width of carrier separation sieve 36.
(D) as narration in the prior art, in the waste water treatment plant that has established, have mud nitrifying groove 12 and solid-liquid separation tank 14 (for example final tank), therefore, as long as only newly establish the carrier nitrifying groove at the mud of having established with the back segment of nitrifying groove 12 and solid-liquid separation tank 14, just can consist of nitrated device of the present invention.Thus, can import simply the waste water treatment plant that has established, equipment cost also becomes cheap simultaneously.
(E) use in the nitrifying groove 16 at carrier, for to carrying out nitration treatment by mud with the ammonium-nitrogen that nitrifying groove 12 carries out the nitrated remnants of mud, compare with in the past active sludge circulation political reform or nitrated promoted type circulation political reform, the ammonium-nitrogen of lower concentration is carried out nitration treatment.Also can carry out at high speed nitration treatment even comprise fixation support 30 for the ammonium-nitrogen of lower concentration, can improve the quality of nitration treatment water.
(F) nitrated device 10 of the present invention not only can not import the waste water treatment plant that has established as active sludge circulation political reform with transforming, even and also can not import in the waste water treatment plant that has established with oxidation ditch process (OD method) or sequence batch reactor method (SBR method) with transforming.
At this, describe comprising fixation support 30.
Can use " the comprising fixation support 30 " among the present invention and carry out polymerization to being mixed with the microbial immobilization material that contains nitrifier, comprise in immobilization material that thus immobilized microorganism and particle diameter are the carrier of (usually 3mm) about 1 ~ 5mm.Immobilization material can be enumerated: high polymer monomer, prepolymer, oligopolymer etc. are not particularly limited, such as using polyacrylamide, polyvinyl alcohol, polyoxyethylene glycol, sodium alginate, carrageenin, agar etc.In addition, the prepolymer of immobilization material can use following material:
(monomethacrylates class) polyethylene glycol monomethacrylate, poly-pentanediol monomethacrylates, polypropylene glycol monomethacrylate, methoxyl group glycol ether methacrylic ester, methoxy polyethylene glycol methacrylate-styrene polymer, hydrogenation phthalic acid methacryloxy ethyl ester, hydrogenation succsinic acid methacryloxy ethyl ester, methacrylic acid 3-chlorine-2-hydroxyl propyl ester, methacrylic acid stearyl, methacrylic acid 2-hydroxy ester, β-dimethyl-aminoethylmethacrylate etc.
(mono acrylic ester class) vinylformic acid 2-hydroxyl ethyl ester, vinylformic acid 2-hydroxypropyl acrylate, isobutyl acrylate, tert-butyl acrylate, Isooctyl acrylate monomer, dodecylacrylate, the vinylformic acid stearyl, isobornyl acrylate, cyclohexyl acrylate, methoxyl group triglycol acrylate, vinylformic acid 2-ethoxy ethyl ester, tetrahydrofurfuryl acrylate, the vinylformic acid phenoxy ethyl, the Nonylphenoxy polyethylene glycol acrylate, Nonylphenoxy polypropylene glycol acrylate, the fluorine-silicon modified acrylic ester, the polypropylene glycol mono acrylic ester, the vinylformic acid phenoxy ethyl, phenoxy group glycol ether acrylate, the phenoxy group polyethylene glycol acrylate, methoxy polyethylene glycol acrylate, hydrogenation succsinic acid acryloxy ethyl ester, dodecylacrylate etc.
(dimethacrylate class) 1, the 3-butylene glycol dimethacrylate, 1, the 4-butylene glycol dimethacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, butylene glycol dimethacrylate, hexanediol dimethacrylate, neopentylglycol dimethacrylate, poly-pentanediol dimethacrylate, 2-hydroxyl-1,3-dimethyl allene acyloxy propane, 2,2-pair-4-methacryloxy ethoxyl phenenyl propane, 3,2-pair-4-methacryloxy diethoxy phenyl propane, 2,2-pair-4-methacryloxy polyethoxye phenyl-propane etc.
(diacrylate class) ethoxylation neopentylglycol diacrylate, polyethyleneglycol diacrylate, 1,6-hexanediyl ester, neopentylglycol diacrylate, tripropylene glycol diacrylate, polypropyleneglycol diacrylate, 2,2-is two-4-acryloxy ethoxyl phenenyl propane, 2-hydroxyl-1-acryloxy-3-methacryloxy propane etc.
(trimethacrylate class) trimethylolpropane trimethacrylate etc.
(triacrylate class) Viscoat 295, pentaerythritol triacrylate, TriMethylolPropane(TMP) oxyethane (EO) addition triacrylate, glycerine propylene oxide (PO) addition triacrylate, ethoxylated trimethylolpropane triacrylate etc.
(tetraacrylate class) tetramethylol methane tetraacrylate, ethoxylation tetramethylol methane tetraacrylate, propoxylated pentaerithytol tetraacrylate, two-trimethylolpropane tetra-acrylate etc.
(urethane acrylate class) urethane acrylate, carbamate dimethacrylate, carbamate trimethacrylate etc.
(other) acrylamide, vinylformic acid, DMAA.
In addition, the radical polymerization of Potassium Persulphate is most preferably used in the polymerization among the present invention, but also can be polymerization or the reductionoxidation polymerization of using ultraviolet ray or electron beam.In the polymerization of using Potassium Persulphate, the addition of Potassium Persulphate is 0.001 ~ 0.25% get final product, and the polymerization promotor that adds 0.001 ~ 0.5% amine and be gets final product.Polymerization promotor as amine system can be DMPN, N, N, and N, ' N '-Tetramethyl Ethylene Diamine, S-WAT etc.
In addition, as in immobilization material, comprising immobilized nitrifier, the nitrifier that also can form for carrying out pure culture, but more preferably the active sludge that contains nitrifier is comprised immobilization.This be the reasons are as follows: the oxygen that is dissolved in immobilization material hinders polymerization, but by comprising immobilized active mud, the active sludge oxygen consumed is successfully carried out polyreaction, therefore, can obtain intensity strong comprise fixation support 30.
For the water quality change of the nitration treatment water of at least one factor change in the ammonium-nitrogen concentration that prevents from following waste water, water temperature, the water yield, nitrated device 10 preferably possesses be used to carrying out mud with nitrifying groove 12 and the carrier load adjustment mechanism with the load adjustment of nitrifying groove 16.Below, the various forms of load adjustment mechanism are described.
(the first embodiment that possesses the nitrated device of load adjustment mechanism)
Fig. 3 is the situation that only is provided with load adjustment mechanism at carrier in nitrifying groove 16.
Be explained, basic comprising is identical with Fig. 1, therefore, only the formation different from Fig. 1 is described.
As shown in Figure 3, load adjustment mechanism is by consisting of such as lower device: bypass pipe arrangement 40, and walk around carrier and make supernatant water be bypassed to processing water pipe arrangement 38 with nitrifying groove 16; Supernatant water divider 42 is dispensed to carrier nitrifying groove 16 and bypass pipe arrangement 40 with supernatant water; The first concentration determination meter 44A measures the ammonium-nitrogen concentration of supernatant water; The second concentration determination meter 44B measures the ammonium-nitrogen concentration of nitration treatment water; Control device 46, based on the measurement result driving supernatant water divider 42 of first and second concentration determination meter 44A, 44B, control is dispensed to the partition rate that carrier is used nitrifying groove 16 and bypass pipe arrangement 40.
The ammonium-nitrogen concentration of the processing water that control device 46 is measured based on the ammonium-nitrogen concentration of the supernatant water of being measured by the first concentration determination meter 44A with by the second concentration determination meter 44B, adjustment is dispensed to carrier with the partition rate of nitrifying groove 16 and bypass pipe arrangement 40, keeps constant mode to control nitration treatment water according to the target quality benchmark that makes nitration treatment water.Partition rate comprises that also a side is 100% and the opposing party is 0% situation.
For example, during the water temperature step-down of waste water, the nitrification activity of active sludge 18 reduces as winter, therefore, is carrying out in the nitrated supernatant water of mud with nitrifying groove 12 by mud, and the residual quantity of ammonium-nitrogen easily change is many.Therefore, the measurement result among the first concentration determination meter 44A uprises, and therefore, control device 46 reduces the flow of the supernatant water that flow to bypass pipe arrangement 40 and increases the flow that flow to carrier usefulness nitrifying groove 16.On the contrary, in the high situation of the water temperature of waste water nitrification activity high and active sludge 18, flow and minimizing that control device 46 increases the supernatant water that flow to bypass pipe arrangement 40 flow to the flow that carrier is used nitrifying groove 16 as summer.Thus, can irrespectively keep the water quality of nitration treatment water constant with season.In addition, in summer, flow to carrier with the processing water yield in the nitrifying groove 16 by minimizing, can reduce the aeration rate of waste.And then, reach 100% by the flow with bypass pipe arrangement 40 sides, also can stop carrier with the running of nitrifying groove 16, reduce running cost.
Be explained, Fig. 3 represents by the figure that is provided with the first concentration determination meter 44A and the second concentration determination meter 44B, but any one among the first concentration determination meter 44A and the second concentration determination meter 44B also can only be set.
(the second embodiment that possesses the nitrated device of load adjustment mechanism)
Fig. 4 is the situation that is provided with load adjustment mechanism at mud with nitrifying groove 12 and carrier with nitrifying groove 16 among both, and carrier is identical with mechanism illustrated in fig. 3 with the load adjustment mechanism of nitrifying groove 16 sides, so description thereof is omitted.
As shown in Figure 4, mud is made of with the nitrated circuit 60 of mud that nitrifying groove 12 and solid-liquid separation tank 14 consist of mud by configuring side by side on the nitrated circuit 58 of mud/carrier that is made of with nitrifying groove 16 with nitrifying groove 12, solid-liquid separation tank 14 and carrier mud with the load adjustment mechanism of nitrifying groove 12 sides.In other words, be set up in parallel the nitrated circuit 60 of mud that 2 row are made of with nitrifying groove 12A, 12B and solid- liquid separation tank 14A, 14B mud, have carrier nitrifying groove 16 these 1 groove of bypass pipe arrangement 40 in its back segment setting.Then, waste water is assigned to the nitrated circuit 60 of mud of 2 row by waste water divider 50 and branch's pipe arrangement 52.Partition rate comprises that also a side is 100% situation.
Be explained, in Fig. 4, be provided with the nitrated circuit 60 of 2 row mud, also can arrange more than 3 row.
The nitrogen concentration that is provided with the ammonium-nitrogen concentration of measuring waste water in former water pipe arrangement 11 measures meter, measure the water thermometer of waste water water temperature, measure at least one in the former water water meter of the water yield of waste water, with the measurement result input control device 56 that records.Be explained, nitrogen concentration mensuration meter, water thermometer, former water water meter do not need all to arrange, as long as the mensuration meter of the large waste water key element of change is set.At this, the situation that is provided with water thermometer 54 is described.In addition, control device 56 is in the low situation of the water temperature of the waste water of measuring with water thermometer 54, and control waste water divider 50 is in the nitrated circuit 60 of mud with waste water 2 five equilibriums to 2 row.
Thus, even in the significantly reduced situation of water temperature nitrification activity low and active sludge 18 of waste water as winter, mud alleviates with the load of per 1 groove of nitrifying groove 12, therefore, can not reduce nitration treatment efficient.On the contrary, in the situation that the water temperature of waste water as summer uprises and the nitrification activity of active sludge 18 uprises, only in the nitrated circuit 60 of mud with wastewater streams to 1 row.
And, carry out carrier from the supernatant water of the nitrated circuit 60 of the mud carrier by possessing load adjustment mechanism with nitrifying groove 16 nitrated.
Like this, by load adjustment mechanism being set with nitrifying groove 16 among both with nitrifying groove 12 and carrier at mud, can prevent from following the water quality change of the nitration treatment water of at least one factor change in the ammonium-nitrogen concentration, water temperature, the water yield of waste water.In other words, this load adjustment mechanism means: can suitably adjust mud with nitrifying groove 12 and the carrier residence time with the waste water in the nitrifying groove 16, and can suitably make up according to the water quality of waste water nitrated and nitrated residence time of carrier of mud.
(the 3rd embodiment that possesses the nitrated device of load adjustment mechanism)
The following formation of load adjustment mechanism of Fig. 5: replace bypass pipe arrangement 40 illustrated in fig. 4, be set up in parallel 2 list body and function nitrifying groove 16A, 16B, the carriers that supernatant water can be dispensed to 2 row by supernatant water divider 42 are with nitrifying groove 16A, 16B.Partition rate comprises that also a side is 100% situation.
Thus, in the residual quantity of the ammonium-nitrogen concentration in the supernatant water situation how, the carriers that supernatant water can be dispensed to 2 row alleviate the load of per 1 groove with nitrifying groove 16A, 16B, therefore, the water quality of nitration treatment water can be maintained necessarily.
In addition, in the situation that Fig. 5 not only can prevent the water quality change of nitration treatment water, and can suitably adjust mud is used the waste water in the nitrifying groove 16 with nitrifying groove 12 and carrier residence time.
(the 4th embodiment that possesses the nitrated device of load adjustment mechanism)
The load adjustment mechanism of Fig. 6 changes the mode that partition rate is adjusted load by waste water divider 50 or supernatant water divider 42 as explanation among Fig. 3 ~ Fig. 5, but configuration has carrier with the nitrated circuit 58 of the mud/carrier of nitrifying groove 16 and do not have the nitrated circuit 60 of mud that carrier is used nitrifying groove 16 side by side, and select the mode of used circuit according to the water quality of waste water.
Namely, as shown in Figure 6, load adjustment mechanism is provided with side by side the nitrated circuit 58 of mud/carrier that is made of with nitrifying groove 16 with nitrifying groove 12, solid-liquid separation tank 14 and carrier mud and is consisted of with nitrifying groove 12 and solid-liquid separation tank 14 and do not had carrier with the nitrated circuit 60 of mud of nitrifying groove 16 by mud.
Fig. 6 (A) is the situation of the combination of the 3 nitrated circuits 58 of mud/carrier that are listed as and the 1 nitrated circuit 60 of mud that is listed as, Fig. 6 (B) is the situation of the combination of the 2 nitrated circuits 58 of mud/carrier that are listed as and the 2 nitrated circuits 60 of mud that are listed as, and Fig. 6 (C) is the situation of the combination of the 1 nitrated circuit 58 of mud/carrier that is listed as and the 3 nitrated circuits 60 of mud that are listed as.
Be explained, in Fig. 6, although the total line columns of the nitrated circuit 58 of mud/carrier and the nitrated circuit 60 of mud is made as 4 row, and be defined in this.
Explain now the situation of Fig. 6 (A), branch out four take-off pipe 62A, 62B, 62C, 62D from former water pipe arrangement 11, linking respectively in three take-off pipe 62A, 62B, 62C has the nitrated circuit 58 of mud/carrier.And in remaining take-off pipe 62D, be connected with the nitrated circuit 60 of mud.In addition, the nitrated circuit 60 of mud of the nitrated circuit 58 of mud/carrier of 3 row and 1 row collaborates to process water pipe arrangement 38 in one by interflow pipe arrangement 64.
In addition, be provided with circuit selecting arrangement 66 in the branch location of former water pipe arrangement 11, at least one in the water meter of in former water pipe arrangement 11, be provided with concentration measurement apparatus, the water thermometer of measuring water temperature of measuring the ammonium-nitrogen concentration in the waste water simultaneously, measuring the water yield.In Fig. 6, show the situation that is provided with water thermometer 54.
In addition, control device 68 is according to the water temperature control circuit selecting arrangement 66 of the waste water that records with water thermometer 54, the take-off pipe of choice for use in four take-off pipe 62A, 62B, 62C, 62D.
Thus, can carry out mud is used nitrifying groove 16 with nitrifying groove 12 and carrier load adjustment according to the ammonium-nitrogen concentration in the waste water, water temperature, the water yield, therefore, the water quality of nitration treatment water can be maintained constant.
In addition, in the situation that Fig. 6 not only can prevent the water quality change of nitration treatment water, and can suitably adjust mud is used the waste water in the nitrifying groove 16 with nitrifying groove 12 and carrier residence time.
Then, the wastewater treatment equipment 70 of the nitrated device 10 of the various forms of having assembled above-mentioned explanation described.
[wastewater treatment equipment]
The wastewater treatment equipment 70 of Fig. 7 is the situation that is assembled into the nitrated device 10 of basic comprising shown in Figure 1.
As shown in Figure 7, be provided with denitrifying tank 72 at mud with the leading portion of nitrifying groove 12, the part of the nitration treatment water of processing with nitrifying groove 16 by carrier simultaneously is circulated to denitrifying tank 72 via circulation pipe arrangement 74.In denitrifying tank 72, the active sludge 76 that contains denitrifier swims under the anaerobism condition, contacts with nitration treatment water, converts the nitrate ammonia in the nitration treatment water to nitrogen thus.In addition, the mud of sedimentation is back to denitrifying tank 72 via sludge reflux pipe arrangement 26 in solid-liquid separation tank 14.
The wastewater treatment equipment 70 of Fig. 8 is the situation that is assembled into the nitrated device 10 of the first embodiment shown in Figure 3, and the wastewater treatment equipment 70 of Fig. 9 is the situation that is assembled into the nitrated device 10 of the second embodiment shown in Figure 4.In addition, the wastewater treatment equipment 70 of Figure 10 is the situation that is assembled into the nitrated device 10 of the 3rd embodiment shown in Figure 5, and the wastewater treatment equipment 70 of Figure 11 is the situation that is assembled into the nitrated device 10 of the 4th embodiment shown in Fig. 6 (A).
In addition, except the basic comprising of Fig. 7, the wastewater treatment equipment of Figure 12 70 has the situation that comprises fixation support of denitrifier for the immobilization that comprises that is provided with assisting nitrogen groove 80 at carrier with the back segment of nitrifying groove 16 and be filled with as packing material in assisting nitrogen groove 80.Be explained, packing material can use the common employed materials such as plastics or sand shape.In addition, although not shown, the organic source that is used for denitrogenation can be next replenishing such as assisting nitrogen groove 80 interior interpolation methyl alcohol.
In the situation of the wastewater treatment equipment 70 of Figure 12, by solid-liquid separation tank 14, active sludge 18 compositions such as SS such as grade can not become entrained in carrier with nitrifying groove 16, therefore, the assisting nitrogen groove 80 of vehicle treated mode can be set with the back segment of nitrifying groove 16 at carrier.By the way, in the situation that the SS composition is many, because packing material stops up, therefore, not only need to carry out continually backwash, and the SS composition leaks to and processes in the water and become the reason of water quality variation.
Thus, can convert the nitrate ammonia by trace residual in the nitration treatment water of carrier with nitrifying groove 16 processing to nitrogen, therefore, can seek to improve the water quality of assisting nitrogen groove final processing water after 80s, be mixed in simultaneously in the final processing water and discharge the SS composition such as active sludge.
In addition, although not shown, but as long as for the formation of the assisting nitrogen groove 80 of vehicle treated mode is set with the back segment of nitrifying groove 16 at carrier, in the situation of the lower waste water of ammonium-nitrogen concentration, also can omit the denitrifying tank 72 and/or the circulation pipe arrangement 74 that are configured in leading portion.
[embodiment]
(test A)
For the wastewater treatment equipment with nitrated device of the present invention (embodiment), in the past the wastewater treatment equipment (comparative example 1) of active sludge circulation political reform and these three devices of wastewater treatment equipment (comparative example 2) of nitrated promoted type circulation political reform in the past, the residence time in the more nitrated circuit (HRT).
In comparison test, embodiment and comparative example 1,2 all are to take the waste water of ammonium-nitrogen as main total nitrogen concentration (TN) as the identical water quality of 40mg/L, relatively are used for obtaining the required HRT of processing water of average approximately TN10mg/L.
* embodiment uses the formation of the wastewater treatment equipment of Fig. 7.
* comparative example 1 is solid-liquid separation tank (initial settling tank) → denitrifying tank (active sludge) → nitrifying groove (active sludge) → solid-liquid separation tank (final tank), makes the part of the nitration treatment water that obtains in nitrifying groove be circulated to denitrifying tank
* comparative example 2 except with the active sludge in the nitrifying groove of comparative example 1 instead of comprising the fixation support, identical with comparative example 1.
Be explained, the sludge concentration in the nitrifying groove of the sludge concentration (MLSS) of the active sludge in the denitrifying tank in embodiment, the comparative example 1,2 and comparative example 1 is set as 2000mg/L.In addition, in the nitrifying groove of the present invention and comparative example 2, fill in the mode that reaches 10% volume and comprise fixation support.In addition, for the dissolved oxygen (DO) that the air aeration that utilizes in the nitrifying groove obtains, embodiment, comparative example 1,2 are all identical, are 3mg/L, and simultaneously, for the recycle ratio that makes the nitration treatment water cycle to denitrifying tank, embodiment, comparative example 1,2 are also identical.
(test-results)
* for embodiments of the invention, mud is 8 hours+carrier with the HRT of nitrifying groove with the HRT of nitrifying groove is 1 hour, adds up to 9 hours HRT.
* the HRT for the nitrifying groove of the comparative example 1 that utilizes active sludge circulation political reform in the past is 12 ~ 16 hours.
* the HRT of the nitrifying groove of the comparative example 2 of utilization nitrated promoted type circulation political reform in the past is 6 ~ 8 hours.In addition, find that the inclusion in the waste water stops up the trend of carrier separation sieve (mesh width 1.5mm), compare with the present invention, safeguard loaded down with trivial details.
By the above results as can be known, the HRT of the nitrated circuit among the present invention with only by comprising that fixation support compares the comparative example 2 that whole waste water carry out nitration treatment, although elongated a little, but with only by active sludge the comparative example 1 that whole waste water carry out nitration treatment is compared, can significantly shorten HRT.
In addition, it is 1 hour with the residence time in the nitrifying groove that embodiments of the invention can make carrier, therefore, compares with comparative example 2, can make significantly the miniaturization of nitrifying groove capacity, like this, also can significantly cut down the loading level that comprises fixation support.In addition, owing in the waste water treatment plant that has established, possessing mud nitrifying groove and solid-liquid separation tank (final tank), therefore, as long as only newly establish the carrier nitrifying groove at the back segment of solid-liquid separation tank, just can in the situation of not transforming the waste water treatment plant that has established, carry out correspondence.
(test B)
The nitrated speed of active sludge is difficult for reducing, still easily reducing low winter in the waste water water temperature in the waste water water temperature high summer.Therefore, use active sludge and comprise fixation support, relatively be assumed to be the nitration treatment efficient of the wastewater temperature (11 ~ 16 ℃) in winter.
Its result, the nitrated speed of property mud is average 1mg/g-SSh, in contrast to this, the nitrated speed that comprises fixation support is average 80mg/L-carrier h.
And the mode take MLSS as 2000mg/L in nitrifying groove is filled above-mentioned active sludge, fills the above-mentioned fixation support that comprises in the mode that reaches 10% volume simultaneously in the nitrifying groove of same capability, investigates the nitrated speed of each groove.
Its result, the nitrifying groove of filling active sludge is 48mg/L-nitrifying groove day, in contrast to this, the nitrifying groove that comprises fixation support is 192mg/L-nitrifying groove day.By this result as can be known, in waste water water temperature low winter, be filled with the nitrifying groove that comprises fixation support and compare with the nitrifying groove that is filled with active sludge, nitrated speed accelerates overwhelmingly.
Thus, by at mud with the backend configuration of nitrifying groove than the small carrier nitrifying groove of nitrated promoted type circulation political reform capacity, comprise the usage quantity of fixation support and the waste water water temperature is low and activity of activated sludge easily descends winter is effective especially countermeasure for significantly cutting down.
(test C)
Test C has the nitrated of the present invention nitrated device of the nitrated and carrier of mud to exist the corresponding ability of which kind of degree to investigate for the change of the ammonium-nitrogen of waste water to combination.Test is that the nitration treatment water of existing sewage work (using active sludge circulation political reform) is introduced the testing apparatus that carrier is used nitrifying groove via test with circuit, and the corresponding ability during to the ammonium-nitrogen concentration change in the waste water is investigated.The temperature of waste water is 11 ~ 21 ℃, and carrier is set as 1 hour with the HRT of nitrifying groove (comprising fixation support 10% filling ratio).The results are shown in Figure 13.
As shown in Figure 13, from the ammonium-nitrogen in the nitration treatment water of sewage work at the about range changing of 0～approximately 19mg/L.But shown in Figure 13 (A), can economize the benchmark of slightly processing water by the ammonium-nitrogen concentration of the nitration treatment water processed with the formation of nitrifying groove with nitrifying groove → solid-liquid separation tank → carrier with mud is below the 5mg/L.This result represents, though the change of the ammonium-nitrogen concentration in the former water of waste water to the scope of 0～20mg/L, the nitration treatment rate also stabilizes to approximately 70%.This expression is even by at the backend configuration capacity little carrier nitrifying groove of mud with nitrifying groove, also can realize processing below the water base accurate 5mg/L winter of the activity decreased of the nitrifier in the active sludge in mud is used nitrifying groove.
On the other hand, Figure 13 (B) is the ammonium-nitrogen concentration (NH according to former water
4-N concentration) make result when flowing to carrier and changing with the inflow ratio of nitrifying groove.Particularly, the NH in former water
4-N concentration is 10mg/L when following, and beginning flows into to the bypass pipe arrangement, the NH in the former water
4-N concentration is processed with the inflow ratio ground of nitrifying groove by more low more the minimizing to carrier.By Figure 13 (B) as can be known, even and use to the inflow of bypass pipe arrangement, also can make the NH that processes water
4-N concentration is below the 5mg/L.At this moment, certainly, because therefore carrier can save aeration power equal energy source with the treatment capacity minimizing of nitrifying groove.
Claims (10)
1. a nitrated device utilizes nitrifier under the aerobism condition ammonium-nitrogen in the waste water to be carried out nitration treatment and forms nitrate ammonia, it is characterized in that possessing at least the nitrated circuit of 1 serial mud/carrier, and the nitrated circuit of described mud/carrier has:
The mud nitrifying groove, wherein, described waste water flows into and utilizes the active sludge that contains described nitrifier to carry out nitrated to described ammonium-nitrogen;
Solid-liquid separation tank wherein, carries out solid-liquid separation to the solids component in the nitration treatment water that is produced by active sludge that has carried out nitration treatment by described mud with nitrifying groove and obtains supernatant water; With
The carrier nitrifying groove, wherein, described supernatant water flows into and utilizes and comprises that the fixation support that comprises that is fixed with described nitrifier carries out nitrated to ammonium-nitrogen residual in the described supernatant water and obtains final nitration treatment water, is provided with the described carrier separation sieve that comprises fixation support simultaneously.
2. nitrated device claimed in claim 1 is characterized in that possessing:
The bypass pipe arrangement is walked around described carrier and is made described supernatant water be bypassed to the processing water pipe arrangement of described nitration treatment water with nitrifying groove;
Nitrogen concentration is measured meter, and the ammonium-nitrogen concentration of described supernatant water and/or described nitration treatment water is measured;
The supernatant water divider is dispensed to described carrier nitrifying groove and described bypass pipe arrangement with described supernatant water; With
Control device is controlled described supernatant water divider based on the measurement result of described concentration determination meter, adjusts with the supernatant water sendout of nitrifying groove and described bypass pipe arrangement being dispensed to described carrier.
3. nitrated device claimed in claim 2 is characterized in that possessing:
The nitrated circuit of mud is set up in parallel with the nitrated circuit of described mud/carrier and is made of with nitrifying groove and described solid-liquid separation tank described mud;
The waste water divider is dispensed to the nitrated circuit of described mud/carrier and the nitrated circuit of described mud with described waste water;
The Wastewater Determination meter is measured the water quality of described waste water;
Control device is controlled described waste water divider based on the measurement result of described Wastewater Determination meter, and the sendout of the waste water that is dispensed to the nitrated circuit of described mud/carrier and the nitrated circuit of described mud is adjusted; With
The interflow pipe arrangement makes the supernatant water interflow of the nitrated circuit of described mud/carrier and the nitrated circuit of described mud and imports the carrier nitrifying groove of the nitrated circuit of described mud/carrier.
4. nitrated device claimed in claim 3 is characterized in that, replaces described bypass pipe arrangement that described carrier nitrifying groove is set.
5. nitrated device claimed in claim 1 is characterized in that possessing:
The nitrated circuit of mud is set up in parallel with the nitrated circuit of described mud/carrier and is made of with nitrifying groove and described solid-liquid separation tank described mud;
The Wastewater Determination meter is measured the water quality of described waste water;
The circuit selecting arrangement carries out the circuit of the nitrated circuit of described mud/carrier and the nitrated circuit of described mud and selects; With
Control device is controlled described circuit selecting arrangement based on the measurement result of described Wastewater Determination meter, selects used circuit in the nitrated circuit of described mud/carrier and the nitrated circuit of described mud.
6. each described nitrated device in the claim 3 ~ 5 is characterized in that, the water quality of described waste water is at least one in ammonium-nitrogen concentration, water temperature, the water yield.
7. each described nitrated device in the claim 1 ~ 6, it is characterized in that, use in the nitrifying groove at described carrier, the described fixation support that comprises is filled in described carrier nitrifying groove under the state that can fluidly be accommodated in the container that is formed with a plurality of limbers, described limbers is for making this comprise the intransitable size of fixation support.
8. wastewater treatment equipment is characterized in that possessing:
Each described nitrated device in the claim 1 ~ 7, and
Denitrifying tank, described denitrifying tank utilize denitrifier under the anaerobism condition nitrate ammonia in the nitration treatment water that has carried out nitration treatment by described nitrated device to be carried out denitrogenation processing to make it convert nitrogen to.
9. wastewater treatment equipment claimed in claim 8, it is characterized in that, described denitrifying tank is arranged at the leading portion of described nitrated device, is circulated to described denitrifying tank with the part that nitrifying groove has carried out the final nitration treatment water of processing via the circulation pipe arrangement by described carrier.
10. wastewater treatment equipment claimed in claim 9, it is characterized in that, except described denitrifying tank, back segment setting at described nitrated device contains the assisting nitrogen groove that comprises fixation support, residual nitrate ammonia converts nitrogen to by described assisting nitrogen groove in the remainder of the final nitration treatment water that will process with nitrifying groove by described carrier, describedly comprises that fixation support comprises and is fixed with described denitrifier.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011148508A JP2013013857A (en) | 2011-07-04 | 2011-07-04 | Nitrification apparatus, and wastewater treating apparatus provided with the same |
| JP2011-148508 | 2011-07-04 |
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| Publication Number | Publication Date |
|---|---|
| CN102863083A true CN102863083A (en) | 2013-01-09 |
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|---|---|---|---|
| CN2012102242330A Pending CN102863083A (en) | 2011-07-04 | 2012-06-28 | Nitrating apparatus and waste water processing apparatus with same |
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| Country | Link |
|---|---|
| JP (1) | JP2013013857A (en) |
| KR (1) | KR20130004877A (en) |
| CN (1) | CN102863083A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706233A (en) * | 2013-12-17 | 2014-04-09 | 杨亮月 | Zero-emission treatment system and method of epoxy ethane |
| CN110606565A (en) * | 2019-09-12 | 2019-12-24 | 广西博世科环保科技股份有限公司 | Inverted shortcut nitrification-anaerobic ammonia oxidation sewage treatment device and treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024017094A (en) * | 2022-07-27 | 2024-02-08 | オルガノ株式会社 | Water treatment device, and water treatment method |
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| CN101479200A (en) * | 2006-07-06 | 2009-07-08 | 株式会社日立工业设备技术 | Inclusive immobilization support, wastewater disposal apparatus and wastewater disposal method using the inclusive immobilization support |
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- 2011-07-04 JP JP2011148508A patent/JP2013013857A/en not_active Withdrawn
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- 2012-06-28 CN CN2012102242330A patent/CN102863083A/en active Pending
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| CN1984847A (en) * | 2004-07-16 | 2007-06-20 | 株式会社可乐丽 | Method of wastewater treatment with excess sludge withdrawal reduced |
| CN1743280A (en) * | 2004-08-30 | 2006-03-08 | 日立工程设备建设株式会社 | Waste water treatment method and apparatus |
| CN101479200A (en) * | 2006-07-06 | 2009-07-08 | 株式会社日立工业设备技术 | Inclusive immobilization support, wastewater disposal apparatus and wastewater disposal method using the inclusive immobilization support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103706233A (en) * | 2013-12-17 | 2014-04-09 | 杨亮月 | Zero-emission treatment system and method of epoxy ethane |
| CN110606565A (en) * | 2019-09-12 | 2019-12-24 | 广西博世科环保科技股份有限公司 | Inverted shortcut nitrification-anaerobic ammonia oxidation sewage treatment device and treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013013857A (en) | 2013-01-24 |
| KR20130004877A (en) | 2013-01-14 |
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