Classifications

• • 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
  • C02F3/1236—Particular type of activated sludge installations
  • C02F3/1257—Oxidation ditches
• • 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
  • C02F3/14—Activated sludge processes using surface aeration
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
  • B01F23/20—Mixing gases with liquids
  • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
  • B01F23/234—Surface aerating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
  • B01F23/20—Mixing gases with liquids
  • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
  • B01F23/234—Surface aerating
  • B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
  • B01F23/23411—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere by cascading the liquid
• • 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
  • C02F3/24—Activated sludge processes using free-fall aeration or spraying
• • 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
  • C02F3/30—Aerobic and anaerobic processes
  • C02F3/301—Aerobic and anaerobic treatment in the same reactor
• • 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

Definitions

• the present invention relates to an inexpensive wastewater treatment apparatus that is suitable for wastewater, especially domestic wastewater, and small and medium-sized sewage treatment, has good treated water quality, is easy to maintain and manage, and is inexpensive.
• oxidation ditch method which is easy to maintain and withstand fluctuations in throughput.
• This method is a type of floating organism method, in which sewage is introduced into a circulating waterway, and aeration is performed while circulating the sewage to perform biological treatment.
• an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a new wastewater treatment apparatus particularly suitable for small- and medium-sized sewage treatment.
• the present invention is to provide an advanced wastewater treatment apparatus with simple facilities, compact and inexpensive, easy maintenance, and good quality of treated water. Disclosure of the invention
• Claim 1 is a secondary wastewater treatment method for biological treatment by circulating primary treatment water from which garbage and contaminants contained in wastewater are removed in a waterway, wherein: Weirs are formed to form an open flow deenergizer that can be opened.Aerobic treatment only by overflow, anaerobic treatment only by underflow, and aerobic treatment and anaerobic treatment by both overflow and underflow Adopt a wastewater treatment method that can also perform
• aerobic treatment to oxidatively decompose organic substances and anaerobic treatment mainly to denitrification can be freely selected or combined, so efficient wastewater treatment suited to the characteristics of wastewater such as sewage can be achieved. It becomes possible.
• the opening amount of the lower part of the weir can be adjusted so that aerobic treatment and anaerobic treatment can be freely selected or combined, as well as the ratio of overflow and underflow, that is, aerobic treatment.
• aerobic treatment and anaerobic treatment can be freely selected or combined, as well as the ratio of overflow and underflow, that is, aerobic treatment.
• Claim 3 is a secondary wastewater treatment device for biologically treating the primary treatment water from which wastewater and contaminants are removed from the wastewater in the circulation channel, wherein the treated water sucked from the terminal end of the circulation channel. Pump that discharges water to the beginning of the water channel, and circulation There will be a weir located in the middle of the canal and composed of vertical walls and sloped walls to reduce the discharge.
• treated water can be overflowed from above the weir and only aerobic treatment by spray jumping can be performed. it can.
• the weir body is fixed above the water channel, only the anaerobic treatment can be performed by allowing the circulating water to flow downward from below the weir without overflowing the treated water from above the weir.
• the weir body is fixed at an intermediate position in the vertical direction of the water channel, the treated water overflows from above the weir and circulating water flows downward from the opening below the weir, resulting in aerobic treatment and anaerobic treatment. Can perform both types of processing.
• the opening / closing plate is provided with an aerobic treatment and Acts as an adjusting member that allows one or both of the anaerobic treatments to be appropriately selected.
• the opening amount of the sedimentation opening / the position of the upper end of the weir changes, and the ratio between the aerobic treatment and the anaerobic treatment can be adjusted more easily.
• the on-off valve changes the opening amount of the sedimentation opening,
• the ratio between the aerobic processing and the anaerobic processing can be easily adjusted.
• the tiltable vertical wall is adjusted so that one or both of the aerobic treatment and the anaerobic treatment can be appropriately selected. It will act as a member. That is, the opening amount of the deposition opening changes depending on the amount of tilt, and the ratio of aerobic processing to anaerobic processing is easily adjusted.
• an angle of a slope formed on the downstream side of the weir main body is variable.
• the weir with a variable angle of the flushing water surface is capable of freely adjusting the falling angle and falling speed of the circulating water overflowing from above the weir, thereby adjusting the amount of the splashing water, that is, the amount of aeration. Fulfill.
• a sinking weir is provided at the bottom of the circulation channel around the weir body described in Claims 3 and 4, respectively.
• the discharge port of the circulating pump is provided for forming a subsurface formed below the weir. Provided toward the deposition opening.
• the outlets of the circulating pumps provided to these sinking openings ensure that the circulating water flows downflow through the sinking openings and that the circulating water strikes the sinking weirs.
• the effect of the anaerobic stirring is further amplified.
• the wastewater treatment device that performs secondary treatment by charging the secondary treated water treated by the wastewater treatment method described in claim 1 or claim 2
• a large number of flexible fibrous contact materials having portions that oscillate due to the circulating flow are installed in the circulation channel at intervals in the flow direction, and the contact materials carry organisms to form a biological treatment zone. While performing aeration upstream of the biological treatment zone, the secondary treatment water is circulated and flowed to perform aerobic treatment and anaerobic treatment.
• any of claims 3 to 8 may be used.
• a flexible fibrous contact material having a portion that oscillates by a circulating flow by a wastewater treatment device that performs secondary treatment by charging secondary treatment water treated by the wastewater treatment device described in any of the above.
• a large number of wastewater treatment plants are installed in the circulation channel at intervals in the direction of the flow channel, and a biological treatment zone is formed by supporting organisms on the contact material.Aerobic and anaerobic treatment is performed by circulating and flowing the secondary treated water. I do.
• a strand obtained by bundling fibers is used as the flexible fibrous contact material according to any one of Claims 9 and 10. -With these means, the strands of the bundles oscillate and disperse in the water, increasing the surface area where organisms attach and form biofilms.
• the flexible fibrous contact material described in each of claims 9 to 12 is made of carbon fiber.
• Carbon fiber has excellent bioadsorption properties and functions as a more effective contact material.
• FIG. 1 is a plan view schematically showing a first embodiment of a primary and secondary treatment stage before a higher treatment of a wastewater treatment apparatus according to the present invention.
• FIG. 2 is a view taken along the line X--X in FIG. 1 of the embodiment.
• FIG. 2 (a) shows a state in which a movable weir body provided in the apparatus is fixed to the tank bottom.
• (B) is a view showing that the dam body is fixed at a substantially middle position in the vertical direction of the tank, and
• (c) is a view that the dam body is fixed at an upper position of the tank.
• FIG. Fig. 3 is a view taken along the line X-X in Fig. 1 showing a modification of the weir.
• Fig. 3 (a) shows a vertical slide type open / close plate provided on the vertical wall part on the upstream side of the fixed weir.
• Fig. 3 (b) shows a state where the opening / closing plate is fixed at the upper position. It is a figure showing signs that a deposition opening is formed below.
• Fig. 4 is a view taken along the line X-X of Fig. 1 showing another modified example of the weir.
• Fig. 4 (a) shows a state where the on-off valve provided at the lower opening of the fixed weir is in a vertical state and is deposited.
• FIG. 4B is a view showing a state in which the opening is closed, and
• FIG. 4B is a view showing a state in which the on-off valve is in a horizontal state and opens an area below the weir main body.
• Fig. 5 is a view taken along the line XX of Fig. 1 showing still another modification of the weir.
• Fig. 5 (a) shows that the lower end of the tiltable vertical wall forming the weir is fixed to the tank bottom.
• (B) is a view showing that the vertical wall is tilted to the downstream side to form a deposition opening in the lower region of the weir main body.
• Fig. 6 shows that the discharge port of the circulating pump is provided toward the sedimentation opening below the movable weir, and that the sinking weir is formed at the bottom of the tank around the sedimentation opening. It is an X-X arrow view.
• FIG. 7 is a simplified plan view of a wastewater treatment apparatus provided with a labyrinth-like circulating water channel according to a second embodiment of the present invention.
• FIG. 8 is a simplified plan view of a spiral wastewater treatment device according to a third embodiment of the present invention.
• Fig. 9 is a simplified plan view showing a wastewater treatment system in which a primary treatment system and a secondary treatment system using a jet streamer and a high-order treatment system with contact materials are installed side by side ( Fig. 1 ) .
• 0 is an external perspective view showing the wastewater treatment apparatus in a simplified manner, omitting a primary treatment part and the like.
• FIG. 11 is a partial cross-sectional view taken along the line X--X shown in FIG. 9 showing a state where the contact material is attached to the circulation channel.
• FIG. 12 is a schematic diagram showing another embodiment of the high-order processing apparatus.
• Figures 13 and 13 show experimental data obtained when wastewater treatment was performed with a secondary treatment device using a jet streamer and a secondary treatment device using a contact material.
• (A) shows the BOD concentration.
• FIG. 4B is a diagram showing a change,
• (b) is a diagram showing a change in total nitrogen concentration, and
• (c) is a diagram showing a change in ammonia nitrogen concentration.
• reference numeral 1 (1a, 1b, 1c) shown in FIGS. 1 to 8 indicates a processing tank body.
• a substantially rectangular treatment tank main body 1a constituting the wastewater treatment apparatus according to the first embodiment of the present invention in FIG. 1 is provided with one end open in the central longitudinal direction of the region in the treatment tank.
• a partition wall 2a is formed, and a U-turn circulating water passage 3a partitioned by the partition wall 2a is formed.
• a primary treatment apparatus I including a screen device, a sedimentation tank, a sludge dewatering facility, a flow control tank, and the like (not shown) is installed.
• Raw wastewater R such as sewage first flows into the primary treatment equipment I, and is subjected to so-called “primary treatment” that removes trash and contaminants in the raw wastewater R.
• the flow rate is adjusted to become primary treatment water T 1, which flows from the primary treatment device I to the circulation water channel 3 a constituting the primary treatment device ⁇ .
• the circulation pump denoted by reference numeral 4 is composed of a suction pipe 9a connected to the end 7a of the circulation channel 3a and a discharge pipe 9b connected to the beginning 7b of the circulation channel (the discharge port of the circulating water is connected to the It is used to circulate and process the treated water in the circulation channel 3a.
• the circulation speed of the treatment water can be appropriately selected.
• Reference numeral 5 shown in FIG. 1 indicates a weir body, and the width of the circulation channel 3a is set in the middle of the circulation channel 3a at a position close to the beginning 7b of the channel at a predetermined interval from the end 7b. It is installed to partition in the direction.
• the weir body 5 was installed at a position close to the water channel start end 7b in this manner is that anaerobic agitation described later is performed by effectively utilizing the flow rate of the treated water discharged from the circulation pump 4 through the discharge pipe 9b. This is because the biological treatment can be performed efficiently, and the biological treatment can be performed efficiently.
• the weir main body 5a shown in FIG. 2 shows an embodiment of a weir installed so as to be movable in the vertical direction by a method in which the main body 5a itself is appropriately selected.
• a side end of the weir main body 5a is fitted in an up / down groove provided on a side wall of a water channel, and is appropriately moved to an arbitrary position while sliding up and down.
• Arbitrary means such as a method of fixing the dam body 5a and a rack and pinion mechanism on the side wall of the weir and the side wall of the water channel, and setting and fixing the weir body 5a at an arbitrary position by rotating gears, etc. Can be adopted.
• the position of the weir main body 5a be adjusted mechanically and automatically.
• the gear of the rack and pinion is driven by power, or the weir main body 5a is simply It is conceivable to hang it with a lane-like object and fix it at an appropriate position.
• the weir body 5a is used when treated water overflowing from the upstream vertical wall 6a and the upper part of the weir body 5a falls obliquely downward. It has a shape with a sloping wall 6b that serves as a water surface.
• the vertical wall 6a is arranged toward the upstream side and has a function of blocking the treated water, while the slope wall 6b is blocked by the vertical wall 6a, and It functions as a gazebo for the treated water overflowing from the upper end, and constitutes a so-called “granulated flow”.
• the inclined wall 6b is engaged with the vertical wall 6a so that the angle ⁇ can be changed.
• This engagement can be achieved by, for example, pivotally connecting the vertical wall 6a and the running water sloping wall 6b to fix the sloping wall 6b at an arbitrary angle.
• the speed and the angle at which the treated water flows down the inclined wall 6b can be changed. That is, it is possible to adjust the aerobic treatment by changing the state in which the treated water is jetted and jumped to change the amount of air entrainment, that is, the amount of aeration.
• the processing is performed by adjusting the angle ct of the inclined wall 6b to about 45 ° ⁇ 5 to 10 °.
• raw wastewater R such as sewage is supplied to a screen device (not shown) for removing solids, a sedimentation tank (not shown) for settling and removing suspended substances, and the flow rate is adjusted.
• the primary treatment device I which is composed of a flow control tank (not shown), which is turned into primary treated water T1
• the circulation channel 3a and biologically treated (screen device, sedimentation tank)
• Appropriate equipment can be used for each pretreatment device such as a flow control tank according to the properties of the treated water.
• Activated sludge for the treatment of suspended organisms is charged in the circulation channel 3a in advance, and is circulated together with the inflowing treated water. For this reason, pollutants in the treated water are biologically decomposed and removed under anaerobic and / or aerobic conditions while circulating and flowing (hereinafter referred to as “secondary treatment”).
• the secondary treated water T 2 is withdrawn from the circulation water channel 3 a by, for example, an overflow pipe (or a communication pipe), and a post-treatment device (not shown) such as a sedimentation treatment tank (when the secondary treatment is terminated) ) Or to a higher-order processing device described below (for further higher-order processing).
• a post-treatment device such as a sedimentation treatment tank (when the secondary treatment is terminated)
• a higher-order processing device described below for further higher-order processing.
• any means can be used as appropriate as a means for supplying and extracting the treated water.
• the “secondary treatment” will be described in more detail.
• the secondary treatment device provided with the jet deenergization when only aeration treatment is performed first, as shown in FIG. a is fixed to the bottom B of the tank, and all the circulated treated water overflows and splashes from above the weir body 5a, and so-called “aeration” is performed using the entrainment of air.
• the amount of dissolved oxygen in the treated water is increased, and active biological treatment by aerobic microorganisms is performed (hereinafter, referred to as “aerobic treatment”).
• the weir body 5a is placed above to block the surface area of the circulating water, Underflow water is formed by circulating treated water from the sedimentation opening 8 formed between a and the tank bottom B.
• weir body 5a is fixed at a substantially middle position in the vertical direction. Then, a part of the circulated treated water overflows from above the weir main body 5a and is jetted out to perform aerobic treatment, and the deposition opening formed between the weir main body 5a and the tank bottom B. From 8, it is also possible to perform anaerobic treatment of underflow water by passing circulating treated water. In this way, the ratio of the aerobic treatment to overflow water and the anaerobic treatment to underflow water is freely adjusted by adjusting the fixed position of the weir body 5a in the vertical direction according to the properties of the treated water. can do. For example, in the case of wastewater containing a large amount of ammonia nitrogen, increase the amount of anaerobic treatment to promote nitrification and denitrification.
• the secondary treatment device according to the present invention can not only perform aerobic treatment by aeration and anaerobic treatment without exposure to air at the same time, but also adjust the ratio of both treatments appropriately to obtain a wide range of properties. This is useful as a wastewater treatment device that can handle treated water.
• a weir body 5b provided with an opening / closing plate 11 which can be slid vertically along the vertical wall 6a is used. Can also.
• the weir body 5b is fixed at a substantially intermediate position of the tank 1a, and a deposition opening 8 is always formed between the weir body 5b and the tank bottom B.
• the opening / closing plate 11 attached to the vertical wall 6a of the main body 5b slides up and down along the vertical wall 6a, the deposition opening 8 can be freely opened and closed.
• the opening / closing plate 11 is provided so as to be slidable up to a position higher than the upper end of the fixed weir body 5b. Therefore, it is possible to completely block the flow of the surface water of the circulating treatment water and perform only the anaerobic treatment on the underflow water passing through the sedimentation opening 8.
• an opening / closing valve 12 in the form of a butterfly valve or the like may be installed so as to cross the tank 3 a at the deposition opening 8. In this configuration, the on-off valve 12 is rotated as shown in FIGS. Then, the opening amount of the sedimentation opening 8 is adjusted to adjust the quantitative ratio of the overflow or the underflow.
• a weir body 5c having a vertical wall 6a formed in a plate shape as shown in FIGS. 5 (a) and 5 (b) may be employed.
• a weir body 5c having a vertical wall 6a formed in a plate shape as shown in FIGS. 5 (a) and 5 (b) may be employed.
• the ratio can also be appropriately selected. In this respect, it is similar to the weir bodies 5a and 5b described above.
• the angle of the slope 6b is made variable, and the speed and angle at which the treated water flows down the slope 6b are changed. It is possible.
• FIG. 6 shows an embodiment in which a sinking weir 10 is provided on the tank bottom B around the deposition opening 8 in the area below the weir main body 5a.
• the sinking weir 10 in the present embodiment plays a role of disturbing the underflow water (the treated water flowing through the tank bottom B) passing through the sedimentation opening 8, and the provision of the sinking weir 10 enables anaerobic stirring. The effect can be amplified.
• the U-turn circulating water channel 3a provided with the partition wall 2a along the longitudinal direction of the treatment tank main body 1a is adopted.However, in a narrow installation space, As in the embodiment shown in FIG. 7, it is possible to form a partition wall 2b in a zigzag shape on a substantially square tank body 1b to form a labyrinth-shaped circulation water passage 3b.
• the entire wastewater treatment device can be made planar and more compact.
• the shape of the dam body 5 (5a, 5b, 5c), the mounting method, and the setting method of the sinking weir 10 and the discharge pipe 9b are described in Figs.
• the configuration is the same as shown in FIG.
• the circulation channel 3c may be formed in a planar spiral using a spiral (or spiral) tank 1c.
• the flow in the circulation channel 3c is smoothed, and the secondary treatment water T2 is discharged into the space formed in the center, so that the space in the center is, for example, settled.
• the equipment can be configured more compactly.
• reference numeral ⁇ shown in FIGS. 9 and 10 indicates a secondary processing device using a jet deenergization device
• reference numeral ⁇ ⁇ shown in the drawing indicates a higher-order processing device using a contact material.
• Both devices [pi, IE are arranged in parallel, Overall, rectangular and have c each device [pi which have the appearance and, in the processing tank 1 of 1Pai, the partition walls 2 a, 2 each one is released c is formed to form U-turn shaped circulation channels 3a and 3d.
• the secondary treatment device ⁇ is provided with a weir body 5 (5a, 5b, 5c) for reducing the jet flow as described above, in the middle of the circulating water channel 3a.
• the contact material holding rods 13 are provided at predetermined intervals above the waterway so as to cross the circulation waterway 3d, and a plurality of fibrous contact materials 14 are provided on each of the rods 13 for a predetermined time. It is vertically suspended at intervals.
• the fibrous contact material 14 shown enlarged in Fig. 11 is a strand that binds a necessary amount of ultra-fine carbon fiber and the like.
• the holding rod 13 is a steel bar whose surface is covered with PVC. Insulating the fiber.
• the holding rod 13 is supported by a receiver 20 attached to the upper part of the side wall of the tank main body 1 forming the circulation channel 3d (see FIG. 11).
• the secondary treatment water T 2 treated by the secondary treatment device ⁇ is taken from the circulation channel 3 a by the overflow pipe (or communication pipe) 15. Then, it flows into the sedimentation tank 16 of the high-order processing tank ⁇ . In the sedimentation tank 16, the secondary treatment water T2 is solid-liquid separated into settled sludge and supernatant water.
• an air-lift pump 2 1 (Not shown in Fig. 10; refer to Fig. 12).
• a method in which aeration and flow promotion are performed at the same time is adopted, and the secondary treated water T2 may be pumped and dropped into the water channel 3d.
• aeration by dropping can be further performed, so that the efficiency of aerobic treatment (oxidative decomposition of organic matter, nitrification of ammonia nitrogen) and anaerobic treatment (denitrification of nitrate nitrogen) can be increased. it can.
• any pumping device such as an Archimedes pump can be used.
• the secondary treated water T 2 flowing into the water channel 3 d is discharged from the settling tank 16 to the biofilm zone 19 a formed at a predetermined portion of the circulation water channel 3 d (the fibrous contact material 14 In the area of the circulating water channel).
• the remaining dissolved oxygen causes biological oxidation by aerobic treatment, and the remaining components not treated by the secondary treatment are removed and dissolved. Anaerobic denitrification is performed in the downstream region where oxygen is consumed.
• this biofilm zone 19a When setting the range of this biofilm zone 19a, take into account the quality of the water to be treated and the quality of the effluent, and adjust the spacing, quantity, aeration rate, and circulation speed of the fibrous contact materials 14 as appropriate. .
• the holding rod 13 to which the contact member 14 is fixed is placed on the circulation channel 3d and is detachably provided, the adjustment work is easy.
• the method of attaching the contact material 14 is not limited to the embodiment, and any appropriate method can be adopted. However, if a means for detachably attaching from the upper part of the waterway is adopted, the biological treatment zone 19 a Setting work becomes easy.
• each single fiber is separated in a waterway, and microorganisms adhere to the surface of each single fiber. It has a high density and adheres firmly and hardly peels off. Furthermore, take each contact material 14 so that it hangs under water and swings. As a result, the formation of biofilms is easy and robust.
• the carbon fiber used for the contact material 14 has a strong and thick biofilm, high biological treatment efficiency (SS, BOD, TN, TP removal rate and removal rate) and high quality of treated water. It can be. Above all, it has been confirmed that the PAN-based carbon fiber has better adhesion of microorganisms.
• the fibrous contact material 14 hangs down in the circulation channel 3d, the circulating flow of the treated water is not hindered, and the biological treatment is performed without blocking due to sludge.
• the biofilm density is high because the ultrafine fiber contact material 14 is used. Therefore, the treatment efficiency is high, the sludge is not separated, and the solid-liquid separation of the treated water is simplified. Also, compared to conventional circulating channel treatment, sludge accumulation does not occur, so that the flow rate can be reduced and the treatment efficiency can be further improved and the quality of treated water can be improved.
• FIG. 12 shows an embodiment of another high-order processing apparatus having a compact shape.
• the secondary treatment water T2 flows into the settling tank 16 by appropriate means, is then pumped up by the air lift pump 21a, and is aerated and flows by dropping into the circulation channel 3e. The promotion is carried out at the same time.
• the biofilm zone 19 b having the same configuration as that of the embodiment shown in FIGS. 9 and 10 was disposed at the terminal end 22 of the circulation waterway 3 e while performing biological treatment such as denitrification.
• Pumped by the air lift pump 21b dropped into the starting end 23 of the circulating water channel 3e, and further circulated repeatedly (in the embodiment of the secondary treatment ⁇ shown in FIGS. 9 and 10).
• treated water is extracted from the 3d end of the circulating water channel by an air lift pump (not shown), dropped and flowed to the 3d starting end of the circulating water channel, and the circulating flow is repeated.
• the high-order treatment water T3 is withdrawn from the middle of the circulation channel 3e or is withdrawn from the final treatment tank provided in the space formed inside the circulation channel 3e. 17, After post-treatment in post-treatment tank 18, it is discharged outside the equipment.
• Fig. 13 Based on Fig. 13 below, experimental data obtained when aerobic treatment was performed by the secondary treatment device using the jet deenergization and aerobic / anaerobic treatment by the high-order treatment device using the contact material explain.
• Figure 13 shows the measurement results with the concentration (mg ZL) on the vertical axis and each measurement day on the horizontal axis.
• concentration mg ZL
• T 2 secondary treated water
• T 3 high-order water It is the measured value of the treated water (T 3) in a bar graph.
• a combination of aerobic secondary treatment and anaerobic high-order treatment is effective.
• the contact filter media captures aerobic effluent sludge and exhibits stable purification capacity. It became clear that.
• total nitrogen shows a concentration of 10 mg / L or less. If the anaerobic treatment capacity of the contact filter media is further increased, it can be expected that the total nitrogen concentration will be further reduced.
• the quality of treated water can be improved with a simple device.
• Industrial applicability As is clear from the above description, the industrial applicability of the invention disclosed by the present application is as follows.
• Aerobic and anaerobic treatments by adjusting the amount of opening below the weirs provided in the waterway to enable the ratio of aerobic and anaerobic treatments to be adjusted. Not only can be freely selected or combined, but also the ratio of aerobic treatment and anaerobic treatment can be freely adjusted according to the characteristics of wastewater, achieving efficient secondary wastewater treatment Can be.
• the treated water is circulated by a circulation pump that discharges from the end to the beginning of the circulation channel, and is disposed in the middle of the circulation channel, and is composed of vertical walls and inclined walls.
• An open / close plate provided on the vertical wall surface of the weir main body, which is provided with a weir that reduces the jet flow and moves the weir main body up and down integrally, or forms an opening between the bottom of the waterway and is fixed
• Aerobic treatment in which the circulating water overflowing from the upper part of the weir is tilted by the tilted vertical wall, and / or anaerobic treatment in which the underflow circulating water passes through the opening below the weir. It is possible to provide a wastewater treatment apparatus in which either one can be freely selected.
• the vertically movable weir body is fixed at the upper position, overflow of the circulating water from above the weir is eliminated, and only from the submerged opening formed between the weir and the bottom of the circulating water channel. Only anaerobic treatment can be performed by discharging circulating water.
• the weir body is fixed to the bottom of the tank, only the aerobic treatment by the blast water can be performed by overflowing the treated water from above the weir body.
• the weir body is fixed at a middle position in the vertical direction of the waterway, the treated water overflows from above the weir and Only the anaerobic treatment can be performed by passing underflow circulating water only from the side.
• the aerobic treatment and / or the anaerobic treatment by passing underflow circulating water from the opening below the weir by means that can freely select the position of the weir main body. Can be provided.
• Opening and closing valves are provided at the opening between the fixed weir body and the bottom of the waterway when the opening / closing plate provided on the vertical wall surface of the weir body is fixed with an opening formed between the bottom of the waterway and the waterway.
• one or both of aerobic treatment and anaerobic treatment can be appropriately and easily selected by adjusting the vertical position of the open / close plate and the rotational position of the open / close valve.
• the tiltable vertical wall can appropriately select one or both of aerobic treatment and anaerobic treatment.
• the amount of tilting changes the opening amount of the sedimentation opening to easily adjust the ratio of aerobic treatment to anaerobic treatment.
• the treated water can be circulated smoothly by providing a zigzag partition wall on the substantially square tank body and forming a circulating water channel in the shape of a lapis, or by forming a planar spiral water channel.
• efficient secondary wastewater treatment is possible even in a narrow place.
• the wastewater treatment by the high-order treatment device that forms the biofilm zone in the circulation channel using the contact material reduces the organic matter. Decomposition, removal and denitrification can be performed effectively.
• the present invention not only provides an efficient aerobic and anaerobic wastewater treatment method and apparatus suitable for medium- and small-scale sewage treatment that is simple, compact, inexpensive, and easy to maintain and maintain, but also provides wastewater.
• a wastewater treatment method and a wastewater treatment device capable of freely performing treatment according to the properties of the wastewater can be provided.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Biodiversity & Conservation Biology (AREA)
• Microbiology (AREA)
• Hydrology & Water Resources (AREA)
• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Water Supply & Treatment (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Biological Treatment Of Waste Water (AREA)
• Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=15478977

Family Applications (1)

Country Status (5)

Cited By (4)

Families Citing this family (7)

Citations (4)

Family Cites Families (1)

• 1998
  • 1998-06-05 KR KR10-1999-7000904A patent/KR100492683B1/ko not_active IP Right Cessation
  • 1998-06-05 CN CN98800773A patent/CN1095449C/zh not_active Expired - Fee Related
  • 1998-06-05 WO PCT/JP1998/002501 patent/WO1998055407A1/ja active IP Right Grant
  • 1998-06-05 JP JP54548998A patent/JP3285884B2/ja not_active Expired - Fee Related
  • 1998-06-05 AU AU75510/98A patent/AU725812B2/en not_active Ceased

Patent Citations (4)

Also Published As

Similar Documents

Legal Events