JP4689007B2 - Wastewater purification method - Google Patents

Wastewater purification method Download PDF

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Publication number
JP4689007B2
JP4689007B2 JP2000189557A JP2000189557A JP4689007B2 JP 4689007 B2 JP4689007 B2 JP 4689007B2 JP 2000189557 A JP2000189557 A JP 2000189557A JP 2000189557 A JP2000189557 A JP 2000189557A JP 4689007 B2 JP4689007 B2 JP 4689007B2
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tank
flow rate
biological reaction
aeration
reaction tank
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JP2002001369A (en
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淳 日比野
正記 伊達
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Housetec Inc
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Housetec Inc
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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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  • Biological Treatment Of Waste Water (AREA)
  • Treatment Of Biological Wastes In General (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、生物反応槽に沈降性担体が充填されている汚水浄化槽に関する。更に詳しくは、し尿や雑排水などの汚水又は排水を生物的に浄化処理する汚水浄化槽、並びに汚水の浄化方法に関する。
【０００２】
【従来の技術】
汚水浄化槽は、従来から種々知られている。汎用される汚水浄化槽の一例を図３に示した（特開平９−２４８５８４号公報）。この汚水浄化槽は、好気濾床槽は粒状担体を充填した上段のＲゾーン（生物反応層）と、同じく粒状担体を充填した下段のＦゾーン（濾過層）の２つの濾床室に分けられるとともに、Ｆゾーンの下に洗浄排水排出管を設け、生物反応時はＲゾーンの下から散気し（Ｆゾーンの下からは散気せず）、Ｆゾーンの洗浄時はＦゾーンの下から散気し、その際、Ｆゾーン（濾過層）洗浄排水を洗浄排水排出管からエアリフトポンプを介して引き抜きながら嫌気濾床槽（第一室）へ戻す構造である。この汚水浄化槽では、Ｆゾーン（濾過層）を洗浄するための水を貯める槽（すなわち、処理水槽）が実質的に不要である。
【０００３】
また、好気濾床槽よりも前槽の嫌気濾床槽（第一室及び第二室）に、いわゆる流量調整機能をもたせた汚水浄化槽も知られている（特開平６−２８５４８４号公報）。これらの汚水浄化槽は、旧来の汚水浄化槽よりも汚水を効率よく、安定に浄化処理でき、槽全体も小型化可能な特徴をもっている。
【０００４】
【発明が解決しようとする課題】
本発明は、これらの汚水浄化槽を発展させ、その性能を更に向上させることを課題とする。
【０００５】
【課題を解決するための手段】
上記課題を達成するため、本発明の汚水の浄化方法は、上流側から、流量調整機能をもつ嫌気処理槽及び／又は流量調整槽、生物反応槽４、並びに消毒槽５を順に配列してなる汚水浄化槽を設け、前記嫌気処理槽及び／又は流量調整槽においては、供給される汚水（原水）を主として嫌気処理し、又は貯留し、前記生物反応槽４においては、（イ）前槽からの液の流入を止めつつ、散気部材７から曝気し生物反応槽４内に流動床を形成させながら処理する曝気反応と、（ロ）前槽から液を流入させつつ、散気部材７からは曝気せずに生物反応槽４内に固定床を形成させながら処理する非曝気反応と、を交互に行い（すなわち、間欠曝気処理をし）、前記消毒槽５においては、処理水を消毒し、そののち放流することを特徴とする、汚水の浄化方法である。
【００１１】
ここで、上記の非曝気反応時には、生物反応槽４内へ流入する液を下向きに流して固定床を通過させ、通過した液を槽下部に設けた連通口９から消毒槽５へと導くことが好ましい。 またこの際、固定床を通過した液は生物反応槽４の下部から嫌気処理槽や流量調整槽へ戻すことが好ましい。
【００１２】
更に、生物反応槽４よりも前の槽（すなわち、嫌気処理槽や流量調整槽）から生物反応槽４内へ液を流入させつつ、生物反応槽４の下部から槽内液を引き抜く場合、引き抜かれた槽内液の一部は生物反応槽４よりも前の槽（すなわち、嫌気処理槽や流量調整槽）へ戻すことが好ましい。
【００１３】
【作用】
散気部材７から生物反応槽４内へ曝気すると、槽内に充填された沈降性担体が撹拌流によって流動し、流動床が形成され、汚水（液）は好気的に生物処理（有機物の酸化、及びアンモニアの硝化）される。このとき、生物反応槽４内へは汚水（液）を流入させない。
散気部材７から生物反応槽４内へ曝気しないとき、すなわち、非曝気時には、沈降性担体は沈降して槽内に固定床が形成される。そして、生物反応槽４の上流の槽（流量調整機能をもつ嫌気処理槽又は流量調整槽）から生物反応槽４へ流入した液は、生物反応槽４で生物浄化された処理液を下方へ押し出しながら下向きに流れ、含まれる浮遊性固形物（ＳＳ）は固定床（沈降性担体）に捕捉される。固定床を通過した液は連通口９から出て、消毒槽５に導かれる。
このように、汚水（液）の流入は曝気反応時に行わず、非曝気反応時にだけ行うので、ＳＳの漏出は少ない。また、非曝気反応時において生物反応槽４内は嫌気状態となるので脱窒反応が進む。
【００１４】
【発明の実施の形態】
以下、発明の実施の形態を添付図面により更に具体的に説明する。図１は本発明の一例の汚水浄化槽の構成略図で曝気時のもの、図２はそれに対応する非曝気時のもので、図中における矢印は空気及び液の流れをそれぞれ示す。この図１及び図２で、系外から汚水浄化槽内へ流れ込む汚水の流入は省略した。
【００１５】
生物反応槽４内には、非曝気（非撹拌）時に沈降し、曝気（散気）・撹拌時には流動可能な「沈降性担体」が充填されている。このため、曝気・撹拌時には担体が生物反応槽４内で流動して流動床が形成され、非曝気（曝気停止）時には担体が沈降して固定床が形成される。ここで、使用される「沈降性担体」としては、小形状であって、網様円筒状、骨格様球状、円筒状、チューブ状、繊維絡み状等の種々の形状で、ＳＳ捕捉能の高い濾材が好ましく、そのようなものとしては、合成樹脂製の小形状成形体又は発泡体（連通気泡体や独立気泡体。好ましくは連通気泡体）がある。
【００１６】
これらの沈降性担体は生物反応槽４から流れ出ないように、生物反応槽４の上部及び下部に各々、液は通すが担体を通さない通水性部材８を配置している。
【００１７】
生物反応槽４の下部には、散気管等の散気部材７を配置している。曝気時には散気部材７から曝気し、非曝気時には曝気しない。曝気・非曝気はタイマー等の使用によって交互に周期的に行うことができる。
【００１８】
また、生物反応槽４の下部には、生物反応槽内の液を引き抜くための排出管１０の下端が配置され、その排出管１０の他端は移送ポンプ（エアリフトポンプ）１１を介して嫌気濾床槽（第一室）２へ戻す構造である。なお、液の戻り先は、嫌気濾床槽（第二室）３であってもよい。
【００１９】
嫌気濾床槽（第一室）２及び嫌気濾床槽（第二室）３は流量調整槽を兼ねており、流量調整ポンプ１２が嫌気濾床槽（第二室）３から生物反応槽４への移流管内に設置されている。嫌気濾床槽（第二室）３を通過した汚水は、エアリフトポンプにより揚水され分水計量後、生物反応槽４へ送液される。流量調整ポンプ１２はエアリフトポンプの代わりに、汎用の送水ポンプであってもよい。
【００２０】
嫌気濾床槽（第一室）２及び嫌気濾床槽（第二室）３にも充填材を充填し、濾床を形成させている。使用される充填材は、網様円筒状、骨格様球状、板状ヘチマ様、小円筒状、波板状等である。なお、嫌気濾床槽（第一室又は第二室）に代えて濾床のない嫌気処理槽であってもよい。
【００２１】
次に、汚水の流れを図１及び図２で説明する。汚水は、先ず、流入口１から嫌気濾床槽（第一室）２に入る。嫌気濾床槽（第一室）２とそれに続く嫌気濾床槽（第二室）３で夾雑物の除去と共に嫌気分解を受け、流量調整ポンプ１２により生物反応槽４へ送られる。流量調整ポンプ１２はブロワ（送風機）１３を制御している制御装置１４と連動しており、生物反応槽４の非曝気中だけ稼働して送液する。
【００２２】
非曝気時における生物反応槽４では、そこに充填されている沈降性担体が沈降し静止状態にあるため、固定床を形成している。流量調整ポンプ１２により送られた汚水（液）は、曝気時に好気処理された液を下方に押し出し、押し出された液は固定床を下向流で通過し、固定床内の担体によってＳＳが捕捉・除去されながら、連通口９から出て、消毒槽５へ導かれる。また、非曝気時には、生物反応槽４内は嫌気状態になるため、脱窒反応が起こり、窒素も除去される。
【００２３】
流量調整ポンプ１２により送られる汚水の量は、好ましくは生物反応槽４の容量以下とする。生物反応槽４の容量を越えて送液するとＳＳは除去できるものの、好気処理が行われず流出してしまうためである。
【００２４】
曝気時、生物反応槽内の散気部材７から空気（酸素含有気体）が吐出されていて、担体に付着した微生物により、主として、有機物の酸化・分解とアンモニアの硝化が進む。
【００２５】
（非曝気時に）担体に捕捉されたＳＳは、曝気時に担体から遊離して、生物反応槽４の底部に沈降する。沈降したＳＳは、生物反応槽４の下部に配置された排出管１０の下端から移送ポンプ（エアリフトポンプ）１１を介して引き抜かれる。このＳＳを含んだ液は嫌気濾床槽（第一室）２に返送される。液の引き抜きのタイミングは特に限定されないが、非曝気時に行うことが好ましい。非曝気時にはＳＳが沈降しやすいからである。この場合、引き抜く液の量は、生物反応槽４に流入する量よりも少なくする。
【００２６】
非曝気時、連通口９から押し出された生物処理後の処理水は、移流管１５を通過後、消毒槽５にて滅菌され、放流口６から放流される。
【００２７】
なお、図１及び図２の例では、流量調整機能をもつ嫌気処理槽及び／又は流量調整槽として、流量調整機能をもつ嫌気濾床槽（第一室）及び嫌気濾床槽（第二室）の例としたが、この他にも種々の態様があり得る。例えば、第一槽を嫌気濾床槽とし、第二槽を散気部材を設けた流量調整室（これには濾床を設ける場合と、設けない場合がある）とする例、これらの順序を逆にする例、嫌気処理槽か流量調整槽かのいずれか一槽のみを配置する例などである。流量調整室に散気部材を設けた場合は、流量調整室において好気的処理を付加することもできる。
【００２８】
【発明の効果】
本発明の汚水浄化槽を用いることにより、あるいは、本発明の汚水浄化方法によれば、汚水は嫌気処理槽又は流量調整槽において嫌気処理され、続いて、生物反応槽において曝気時に好気的に生物分解され、非曝気時にはＳＳが捕捉されるとともに、脱窒され、良好な処理水が安定して得られる。
【００２９】
また、生物反応槽に充填された担体はその全てが、その槽全体を使って、好気処理、ＳＳの捕捉、脱窒処理等に有効に利用されるため、生物反応槽（したがって、全体の汚水浄化槽）は小型化できる。
【図面の簡単な説明】
【図１】本発明の一例の汚水浄化槽の構成略図で、曝気時のもの。矢印は空気及び液の流れを示す。
【図２】図１に対応の汚水浄化槽の構成略図で、非曝気時のもの。矢印は空気及び液の流れを示す。
【図３】従来例の汚水浄化槽の構成略図。
【符号の説明】
１：流入口 ２：嫌気濾床槽（第一室）
３：嫌気濾床槽（第二室） ４：生物反応槽
５：消毒槽 ６：放流口
７：散気部材（散気管） ８：通水性部材
９：連通口 １０：排出管
１１：移送ポンプ（エアリフトポンプ）
１２：流量調整ポンプ １３：ブロワ（送風機）
１４：制御装置 １５：移流管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sewage purification tank in which a biological reaction tank is filled with a sedimentary carrier. More specifically, the present invention relates to a sewage septic tank for biologically purifying sewage or waste water such as human waste and miscellaneous waste water, and a method for purifying sewage.
[0002]
[Prior art]
Various sewage septic tanks are conventionally known. An example of a general-purpose wastewater septic tank is shown in FIG. 3 (Japanese Patent Laid-Open No. 9-245854). In this sewage purification tank, the aerobic filter bed tank is divided into two filter bed chambers, an upper R zone (biological reaction layer) filled with a granular carrier and a lower F zone (filter layer) also filled with a granular carrier. At the same time, a cleaning drainage pipe is provided under the F zone. Air is diffused from the bottom of the R zone during biological reaction (not from the bottom of the F zone). At that time, the F zone (filter layer) washing wastewater is returned to the anaerobic filter bed tank (first chamber) while being pulled out from the washing drainage discharge pipe through an air lift pump. In this sewage septic tank, a tank (that is, a treated water tank) for storing water for washing the F zone (filter layer) is substantially unnecessary.
[0003]
There is also known a sewage septic tank in which a so-called flow rate adjusting function is provided in the anaerobic filter bed tank (first chamber and second chamber) in front of the aerobic filter bed tank (JP-A-6-285484). . These sewage septic tanks are characterized in that sewage can be purified more efficiently and stably than conventional sewage septic tanks, and the entire tank can be downsized.
[0004]
[Problems to be solved by the invention]
It is an object of the present invention to develop these septic tanks and further improve their performance.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the method for purifying sewage according to the present invention comprises, from the upstream side, an anaerobic treatment tank and / or a flow rate adjustment tank having a flow rate adjustment function, a biological reaction tank 4, and a disinfection tank 5 arranged in order. In the anaerobic treatment tank and / or the flow rate adjustment tank, the supplied sewage (raw water) is mainly anaerobically treated or stored, and in the biological reaction tank 4, (i) from the previous tank An aeration reaction in which the liquid is aerated while stopping the inflow of the liquid and is processed while forming a fluidized bed in the biological reaction tank 4, and (b) A non-aeration reaction that is performed while forming a fixed bed in the biological reaction tank 4 without aeration is performed alternately (that is, intermittent aeration treatment is performed). In the disinfection tank 5, the treated water is disinfected, Purification of sewage, characterized by being discharged afterwards It is the law.
[0011]
Here, at the time of the above-mentioned non-aeration reaction, the liquid flowing into the biological reaction tank 4 is allowed to flow downward to pass through the fixed bed, and the passed liquid is guided to the disinfection tank 5 from the communication port 9 provided at the bottom of the tank. Is preferred. At this time, the liquid that has passed through the fixed bed is preferably returned from the lower part of the biological reaction tank 4 to the anaerobic treatment tank or the flow rate adjustment tank.
[0012]
Furthermore, when the liquid in the tank is drawn out from the lower part of the biological reaction tank 4 while the liquid is flowing into the biological reaction tank 4 from the tank before the biological reaction tank 4 (that is, the anaerobic treatment tank or the flow rate adjusting tank). It is preferable that a part of the extracted liquid in the tank is returned to a tank (that is, an anaerobic treatment tank or a flow rate adjusting tank) before the biological reaction tank 4.
[0013]
[Action]
When aeration from the air diffuser 7 into the biological reaction tank 4, the sedimentary carrier filled in the tank flows by the stirring flow, a fluidized bed is formed, and the sewage (liquid) is aerobically biologically treated (organic matter). Oxidation and nitrification of ammonia). At this time, sewage (liquid) is not allowed to flow into the biological reaction tank 4.
When the aeration member 7 does not aerate into the biological reaction tank 4, that is, when it is not aerated, the sedimentary carrier settles and a fixed bed is formed in the tank. And the liquid which flowed into the biological reaction tank 4 from the tank (anaerobic processing tank or flow control tank with a flow control function) upstream of the biological reaction tank 4 pushes down the processing liquid biologically purified in the biological reaction tank 4. While flowing downward, the suspended solids (SS) contained are trapped in a fixed bed (settlement carrier). The liquid that has passed through the fixed bed exits from the communication port 9 and is guided to the disinfection tank 5.
Thus, since the inflow of sewage (liquid) is not performed at the time of the aeration reaction, but only at the time of the non-aeration reaction, the leakage of SS is small. Further, since the inside of the biological reaction tank 4 is in an anaerobic state during the non-aeration reaction, the denitrification reaction proceeds.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described more specifically with reference to the accompanying drawings. FIG. 1 is a schematic diagram of the configuration of a sewage septic tank according to an embodiment of the present invention when aerated. FIG. 2 shows the corresponding non-aerated state, and arrows in the figure indicate the flow of air and liquid, respectively. In FIG. 1 and FIG. 2, the inflow of sewage flowing from outside the system into the sewage septic tank is omitted.
[0015]
The biological reaction tank 4 is filled with a “sedimentable carrier” that settles when not aerated (non-stirred) and flows when aerated (diffused) / stirred. For this reason, at the time of aeration / stirring, the carrier flows in the biological reaction tank 4 to form a fluidized bed, and at the time of non-aeration (aeration stop), the carrier settles to form a fixed bed. Here, the “sedimentable carrier” used has a small shape and various shapes such as a net-like cylindrical shape, a skeleton-like spherical shape, a cylindrical shape, a tube shape, and a fiber-entangled shape, and has a high SS capturing ability. A filter medium is preferable, and as such a material, there is a small-sized molded body or foam made of synthetic resin (open cell body or closed cell body, preferably open cell body).
[0016]
In order to prevent these sedimentary carriers from flowing out of the biological reaction tank 4, a water-permeable member 8 that allows liquid to pass through but does not pass through the carrier is disposed in the upper and lower parts of the biological reaction tank 4.
[0017]
A diffuser member 7 such as a diffuser tube is disposed in the lower part of the biological reaction tank 4. Aeration is performed from the diffuser 7 during aeration, and no aeration is performed during non-aeration. Aeration and non-aeration can be performed periodically alternately by using a timer or the like.
[0018]
Further, a lower end of a discharge pipe 10 for drawing out the liquid in the biological reaction tank is arranged at the lower part of the biological reaction tank 4, and the other end of the discharge pipe 10 is anaerobic filtered through a transfer pump (air lift pump) 11. This is a structure for returning to the floor tank (first chamber) 2. The return destination of the liquid may be an anaerobic filter bed tank (second chamber) 3.
[0019]
The anaerobic filter bed tank (first chamber) 2 and the anaerobic filter bed tank (second chamber) 3 also serve as a flow rate adjustment tank, and the flow rate adjustment pump 12 is connected to the biological reaction tank 4 from the anaerobic filter bed tank (second chamber) 3. It is installed in the advection pipe. The sewage that has passed through the anaerobic filter bed tank (second chamber) 3 is pumped up by an air lift pump, and is sent to the biological reaction tank 4 after diversion. The flow rate adjusting pump 12 may be a general-purpose water pump instead of the air lift pump.
[0020]
The anaerobic filter bed tank (first chamber) 2 and the anaerobic filter bed tank (second chamber) 3 are also filled with a filler to form a filter bed. The filler used is a net-like cylinder, a skeleton-like sphere, a plate-like loofer, a small cylinder, a corrugated plate, or the like. An anaerobic treatment tank without a filter bed may be used instead of the anaerobic filter bed tank (first chamber or second chamber).
[0021]
Next, the flow of sewage will be described with reference to FIGS. First, the sewage enters the anaerobic filter bed tank (first chamber) 2 from the inlet 1. The anaerobic filter bed tank (first chamber) 2 and the subsequent anaerobic filter bed tank (second chamber) 3 are subjected to anaerobic decomposition along with the removal of impurities, and are sent to the biological reaction tank 4 by the flow rate adjusting pump 12. The flow rate adjustment pump 12 is interlocked with a control device 14 that controls a blower (blower) 13, and operates and sends liquid only during non-aeration of the biological reaction tank 4.
[0022]
In the biological reaction tank 4 at the time of non-aeration, since the sedimentary carrier filled therein settles and is in a stationary state, a fixed bed is formed. The sewage (liquid) sent by the flow rate adjusting pump 12 pushes down the aerobic treated liquid at the time of aeration, and the pushed liquid passes through the fixed bed in a downward flow, and the SS is absorbed by the carrier in the fixed bed. While being captured and removed, it exits the communication port 9 and is guided to the disinfection tank 5. Moreover, since the inside of the biological reaction tank 4 is in an anaerobic state at the time of non-aeration, a denitrification reaction occurs and nitrogen is also removed.
[0023]
The amount of sewage sent by the flow rate adjusting pump 12 is preferably not more than the capacity of the biological reaction tank 4. This is because, if the liquid is fed beyond the capacity of the biological reaction tank 4, SS can be removed, but the aerobic treatment is not performed and the SS flows out.
[0024]
At the time of aeration, air (oxygen-containing gas) is discharged from the diffuser member 7 in the biological reaction tank, and organic matter mainly oxidizes / decomposes and nitrifies ammonia by microorganisms attached to the carrier.
[0025]
The SS captured by the carrier (at the time of non-aeration) is released from the carrier at the time of aeration and settles at the bottom of the biological reaction tank 4. The settled SS is pulled out from the lower end of the discharge pipe 10 arranged at the lower part of the biological reaction tank 4 via a transfer pump (air lift pump) 11. The liquid containing SS is returned to the anaerobic filter bed tank (first chamber) 2. The timing of extracting the liquid is not particularly limited, but it is preferable to perform it at the time of non-aeration. This is because SS tends to settle during non-aeration. In this case, the amount of liquid to be withdrawn is smaller than the amount flowing into the biological reaction tank 4.
[0026]
At the time of non-aeration, the treated water pushed out from the communication port 9 is sterilized in the disinfection tank 5 after passing through the advection pipe 15 and discharged from the discharge port 6.
[0027]
In the examples of FIGS. 1 and 2, an anaerobic treatment tank and / or a flow rate adjustment tank having a flow rate adjusting function are used as an anaerobic filter bed tank (first chamber) and an anaerobic filter bed tank (second chamber) having a flow rate adjusting function. However, there are various other modes. For example, the first tank is an anaerobic filter bed tank, and the second tank is a flow rate adjustment chamber provided with an air diffuser (this may or may not be provided with a filter bed). An example of reversing is an example in which only one tank of an anaerobic treatment tank or a flow rate adjustment tank is disposed. In the case where an air diffuser is provided in the flow rate adjusting chamber, an aerobic process can be added in the flow rate adjusting chamber.
[0028]
【The invention's effect】
By using the sewage purification tank of the present invention or according to the sewage purification method of the present invention, the sewage is anaerobically treated in an anaerobic treatment tank or a flow rate adjustment tank, and subsequently aerobically bioreacted during aeration in a biological reaction tank. When it is decomposed and not aerated, SS is captured and denitrified, and good treated water can be stably obtained.
[0029]
Moreover, since all the carriers filled in the biological reaction tank are effectively used for aerobic treatment, SS capture, denitrification treatment, etc. using the entire tank, the biological reaction tank (and therefore the entire reaction tank) The wastewater septic tank can be downsized.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an example of a sewage septic tank according to the present invention, when aerated. Arrows indicate air and liquid flows.
FIG. 2 is a schematic configuration diagram of a sewage septic tank corresponding to FIG. 1, which is not aerated. Arrows indicate air and liquid flows.
FIG. 3 is a schematic diagram of a conventional wastewater septic tank.
[Explanation of symbols]
1: Inlet 2: Anaerobic filter bed tank (first chamber)
3: Anaerobic filter bed tank (second chamber) 4: Biological reaction tank 5: Disinfection tank 6: Outlet 7: Air diffuser member (air diffuser pipe) 8: Water flow member 9: Communication port 10: Drain pipe 11: Transfer pump (Air lift pump)
12: Flow adjustment pump 13: Blower (blower)
14: Control device 15: Advection tube

Claims (1)

上流側から、流量調整機能をもつ嫌気処理槽及び／又は流量調整槽、生物反応槽、並びに消毒槽を順に配置してなる汚水浄化槽を設け、前記嫌気処理槽及び／又は流量調整槽においては、供給される汚水を嫌気処理し、又は貯留し、前記生物反応槽の上方に送液する流量調整ポンプを設け、前記生物反応槽においては、曝気によって流動可能な沈降性担体が充填されていて、下部に散気部材及び前記消毒槽へ導かれる連通口が設けられており、（イ）前記流量調整ポンプを稼動させずに前槽からの液の流入を止めつつ、前記散気部材から曝気し前記生物反応槽内に流動床を形成させながら処理する曝気反応と、（ロ）前記流量調整ポンプを稼動させて前槽から液を流入させつつ、前記散気部材からは曝気せずに前記生物反応槽内に前記沈降性担体を沈降させて固定床を形成させながら処理する非曝気反応と、を交互に行い、前記消毒槽においては、処理水を消毒し、そののち放流する、汚水の浄化方法。 From the upstream side, an anaerobic treatment tank having a flow rate adjustment function and / or a flow rate adjustment tank, a biological reaction tank, and a sewage purification tank in which a disinfection tank are arranged in order, and in the anaerobic treatment tank and / or the flow rate adjustment tank, The supplied sewage is anaerobically treated or stored, and a flow rate adjustment pump is provided for feeding the liquid reaction tank above the biological reaction tank, and the biological reaction tank is filled with a sedimentary carrier that can flow by aeration, A lower part is provided with a diffuser member and a communication port led to the sterilization tank. (A) Aeration is performed from the diffuser member while stopping the flow of liquid from the front tank without operating the flow rate adjusting pump. Aerobic reaction to be processed while forming a fluidized bed in the biological reaction tank; and (b) operating the flow rate adjusting pump to allow liquid to flow in from the previous tank, but not aeration from the diffuser member. Precipitation in the reaction tank Perform a non-aerated reaction allowed to settle body processes while forming a fixed bed, it is alternately, in the disinfecting bath, disinfect treated water is discharged after the purification process of sewage.
JP2000189557A 2000-06-23 2000-06-23 Wastewater purification method Expired - Fee Related JP4689007B2 (en)

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CN109867403B (en) * 2017-12-01 2023-09-22 中国水利水电科学研究院 Decentralized sewage treatment device and sewage treatment method
CN110922014A (en) * 2019-12-30 2020-03-27 陕西新泓水艺环境科技有限公司 Integrated treatment equipment for excrement
CN111943460A (en) * 2020-09-07 2020-11-17 北京万原洪真科技有限公司 Public toilet washes circulation water integrated treatment facility

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