JP2000254680A - Waste water treatment - Google Patents
Waste water treatmentInfo
- Publication number
- JP2000254680A JP2000254680A JP11058623A JP5862399A JP2000254680A JP 2000254680 A JP2000254680 A JP 2000254680A JP 11058623 A JP11058623 A JP 11058623A JP 5862399 A JP5862399 A JP 5862399A JP 2000254680 A JP2000254680 A JP 2000254680A
- Authority
- JP
- Japan
- Prior art keywords
- raw water
- water
- tank
- microorganism
- microorganism tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Activated Sludge Processes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、有機性排水、特に
流入排水質の変動が大きい、し尿処理場におけるし尿処
理、食品関係工場や蓄場等における排水処理などに適用
される。The present invention is applied to the treatment of organic wastewater, especially human waste in a human waste treatment plant where the quality of inflow wastewater varies greatly, and the treatment of wastewater in food-related factories and storage facilities.
【0002】[0002]
【従来の技術】従来、活性オデイ法による排水処理方法
においては、図2に示すように、微生物槽aへの原水の
供給量、例えばポンプbによる原水の供給速度を一定化
したうえで、流入BOD量(微生物学的酸素要求量)の
変化に伴う微生物槽aの状態を、ORP(酸化還元電
位)、DO(溶存酸素)、pH等を各計器c〜eで測定
し、この測定値に基づいて制御装置fによりブロワーg
を駆動制御することで、微生物槽aへの供給空気量を変
化させ、安定した運転を期している。2. Description of the Related Art Conventionally, in a wastewater treatment method using the active body method, as shown in FIG. ORP (redox potential), DO (dissolved oxygen), pH, etc. are measured with each of the instruments c to e, and the state of the microbial vessel a with the change in the BOD amount (microbiological oxygen demand) is measured. Blower g by control device f based on
, The amount of air supplied to the microorganism tank a is changed, and stable operation is expected.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の活性オデイ法による排水処理方法では、以下のよう
な問題点があった。However, the above-mentioned conventional waste water treatment method using the active body method has the following problems.
【0004】まず、微生物槽の規模は、汚染度が高い原
水を基準にして微生物槽に供給される当該原水中の単位
時間当たりのBOD量を参考として設計しているが、前
記BOD量を参考として経験から処理設備の規模を決定
する際して、安全率を考えればどうしても規模が過大と
なる。[0004] First, the scale of the microbial tank is designed with reference to the amount of BOD per unit time in the raw water supplied to the microbial tank based on the highly contaminated raw water. When deciding the scale of the processing equipment from experience, the scale is inevitably too large considering the safety factor.
【0005】また、実装置の運転においては、微生物槽
での運転状況が一応安定状態にあったとしても、流入B
OD量の増減によっては、微生物槽の変化が要求される
ことになる。その対応はブロワーによる吹き込み空気量
の増減により対応することとなるが、この操作によって
得られる効果は、通常4〜6時間経過後でないと発現し
ない。従って、その間の微生物槽の運転状況は極めて不
安定であり、浄化水質の悪化や過剰曝気現象が避けられ
ない。[0005] In the operation of the actual apparatus, even if the operation state in the microbial vessel is in a stable state, the inflow B
Depending on the increase or decrease of the OD amount, a change in the microorganism tank is required. The countermeasures will be taken by increasing or decreasing the amount of air blown by the blower. However, the effect obtained by this operation usually does not appear until 4 to 6 hours have elapsed. Therefore, the operation condition of the microorganism tank during that time is extremely unstable, and the deterioration of the purified water quality and the excessive aeration phenomenon are inevitable.
【0006】これらにより、排水処理設備の運転者には
高度の経験熟練が必要で、各計器の指示チェック、必要
によっては浄化水の分析を行って適切な運転を行わなけ
ればならない。As a result, the operator of the wastewater treatment facility requires a high degree of experience and skill, and it is necessary to check the indication of each instrument and, if necessary, analyze the purified water to perform an appropriate operation.
【0007】つまり、従来の排水処理方法のように、原
水供給速度を一定化し、流入BOD量の変化に対応して
吹込み空気量を調整するものでは、上述のように急激な
微生物槽の変化に充分な対応は不可能であった。That is, as in the conventional wastewater treatment method, in which the raw water supply speed is fixed and the amount of the blown air is adjusted in response to the change in the inflow BOD amount, as described above, the rapid change of the microorganism tank is performed. Was not enough.
【0008】本発明は、上記問題点に鑑みてなされたも
ので、微生物槽の運転状況を安定化させるために、微生
物槽への原水の供給量を当該微生物槽の状態に応じて変
化させることで、微生物槽の運転を微生物活性の最も高
い状況下での運転を可能とすること目的とするものであ
る。[0008] The present invention has been made in view of the above problems, and in order to stabilize the operation state of a microorganism tank, the supply amount of raw water to the microorganism tank is changed according to the state of the microorganism tank. It is an object of the present invention to enable the operation of the microbial tank in an environment with the highest microbial activity.
【0009】[0009]
【課題を解決するための手段】本発明の排水処理方法
は、活性オデイ法による排水処理方法において、原水の
処理を行うための微生物槽に供給する当該原水の供給量
を、上記微生物槽で浄化された後の浄化水の水質に応じ
て調整するものである。According to a wastewater treatment method of the present invention, in a wastewater treatment method based on the active body method, a supply amount of raw water supplied to a microorganism tank for treating raw water is purified by the microorganism tank. It is adjusted according to the quality of the purified water after the cleaning.
【0010】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0011】図1は、本発明の排水処理方法を実施する
ための設備の概略構成を示している。FIG. 1 shows a schematic configuration of equipment for carrying out the wastewater treatment method of the present invention.
【0012】微生物が着床された微生物槽1には、原水
槽2に貯留された原水が供給管3を通じて当該供給管3
に設けられた供給ポンプ4により供給される。The raw water stored in the raw water tank 2 is supplied through the supply pipe 3 into the microorganism tank 1 on which the microorganisms have been implanted.
Is supplied by the supply pump 4 provided in the first stage.
【0013】原水槽2に貯留された原水は、例えば、し
尿処理場で処理するし尿や、食品関係工場や蓄場等から
排出される排水などである。The raw water stored in the raw water tank 2 is, for example, human waste processed in a human waste processing plant, and wastewater discharged from a food-related factory or a storage facility.
【0014】前記供給ポンプ4は、可変流量ポンプが用
いられており、後述する制御装置5からの制御信号に基
づいて駆動制御され、原水の供給速度を調整すること
で、前記微生物槽1への原水の供給量を調整するように
なされている。As the supply pump 4, a variable flow rate pump is used. The supply pump 4 is driven and controlled based on a control signal from a control device 5 to be described later. The supply of raw water is regulated.
【0015】また、微生物槽1には、排出管6が接続さ
れており、この排水管6を通じて微生物槽1で原水を浄
化した浄化水を排出する。A discharge pipe 6 is connected to the microorganism tank 1, and discharges purified water obtained by purifying raw water in the microorganism tank 1 through the drain pipe 6.
【0016】排出管6には浄化水の水質を測定するため
の浄化水質測定器7が設けられている。浄化水質測定器
7により測定する対象は、原水の質によって適当に決定
されるが、例えば、NH3−N(アンモニア窒素)量、
T−N(トータル窒素)量、T−C(トータル炭素)量
などがあげられ、また、浄化水放流基準水質を参考とす
ることも考えられる。The discharge pipe 6 is provided with a purified water quality measuring device 7 for measuring the quality of the purified water. The object to be measured by the purified water quality measuring device 7 is appropriately determined according to the quality of the raw water, and for example, the amount of NH3-N (ammonia nitrogen),
Examples include the amount of TN (total nitrogen) and the amount of TC (total carbon), and it is also conceivable to refer to the reference water quality of purified water discharge.
【0017】前記浄化水質測定器7で測定された測定値
は、制御装置5に入力され、この制御装置5では上記測
定値に基づいて供給ポンプ4に駆動信号を出力し、供給
ポンプ4による原水の供給速度を調整する。The measured value measured by the purified water quality measuring device 7 is input to a control device 5, which outputs a drive signal to the supply pump 4 based on the measured value. Adjust the feed rate of the feed.
【0018】具体的には、浄化水質測定器7で測定され
た測定値が予め設定された設定範囲内にあれば制御装置
5では、供給ポンプ4の駆動を変更することなく当該供
給ポンプ4による原水の供給を引き続き行う。More specifically, if the measured value measured by the purified water quality measuring device 7 is within a preset setting range, the control device 5 controls the supply pump 4 without changing the drive of the supply pump 4. Continue supplying raw water.
【0019】一方、上記測定値が設定範囲の上限値より
も大きければ、制御装置5から供給ポンプ4に信号を出
力して、供給ポンプ4による原水の供給速度を減少さ
せ、微生物槽1への原水の供給量を減少させる。On the other hand, if the measured value is larger than the upper limit of the set range, a signal is output from the control device 5 to the supply pump 4 so that the supply speed of the raw water by the supply pump 4 is reduced, and Reduce the supply of raw water.
【0020】また、上記測定値が設定範囲の下限値より
小さければ、制御装置5から供給ポンプ4に信号を出力
して、供給ポンプ4による原水の供給速度を増加させ、
微生物槽1への原水の供給量を増加させる。If the measured value is smaller than the lower limit of the set range, the controller 5 outputs a signal to the supply pump 4 to increase the supply speed of the raw water by the supply pump 4,
The supply amount of raw water to the microorganism tank 1 is increased.
【0021】なお、制御装置5により供給ポンプ4の駆
動を制御して行う微生物槽1への原水の供給量の調整
は、経験的に求めたものであり、この経験で得たデータ
が制御装置にプログラムされている。The adjustment of the amount of raw water supplied to the microbial tank 1 by controlling the drive of the supply pump 4 by the control device 5 is obtained empirically, and the data obtained through this experience is used as the control device. Is programmed to
【0022】このようにして微生物槽1への原水の供給
量を調整することで、微生物槽1内では微生物活性の最
も高い状況で、浄化処理が行われることになり、これに
より原水の浄化処理能力を大幅に向上させることができ
る。By adjusting the supply amount of the raw water to the microbial tank 1 in this manner, the purification processing is performed in the microbial tank 1 with the highest microbial activity. Ability can be greatly improved.
【0023】また、付属的な計器として微生物槽1内の
原水のORP、DO、pH等の値を計測する各計器8〜
10を設けることで、これら計器8〜10で計測した値
も、前記水質測定器7で測定した測定値と合わせて制御
装置5における供給ポンプ4の流量変更プログラムに加
えられることで、当該制御装置5による制御精度の向上
を図ることができる。Further, each of the instruments 8 to 8 for measuring the values of ORP, DO, pH, etc. of the raw water in the microbial tank 1 as auxiliary instruments.
By providing 10, the values measured by the meters 8 to 10 are also added to the flow rate change program of the supply pump 4 in the control device 5 together with the measurement values measured by the water quality measuring device 7, so that the control device 5 can improve control accuracy.
【0024】図1の符号11は、微生物の活性に必要な
空気を微生物槽1に空気を供給するためのブロワーであ
る。Reference numeral 11 in FIG. 1 denotes a blower for supplying air necessary for the activity of microorganisms to the microorganism tank 1.
【0025】上述した本発明の排水処理方法は、既存の
設備に浄化水質測定器7を設け、供給ポンプ4を可変式
にすることなどによって、簡単に実施することができ、
本発明の排水処理方法を実施する上での大きなメリット
になる。The above-described wastewater treatment method of the present invention can be easily implemented by providing a purified water quality measuring instrument 7 in existing equipment and making the supply pump 4 variable.
This is a great advantage in implementing the wastewater treatment method of the present invention.
【0026】なお、微生物槽1に供給する原水の供給量
を調整する手段としては、本実施の形態のように可変の
供給ポンプ4を駆動制御するものに限らず、微生物槽1
に供給する原水の供給量を調整可能なあらゆる手段が適
用できることは言うまでもない。例えば、供給管3に可
変流量調整弁を設けることによっても上記手段は達成で
きる。The means for adjusting the supply amount of raw water to be supplied to the microbial tank 1 is not limited to the one that drives and controls the variable supply pump 4 as in the present embodiment.
It is needless to say that any means capable of adjusting the amount of raw water supplied to the plant can be applied. For example, the above means can also be achieved by providing a variable flow control valve in the supply pipe 3.
【0027】[0027]
【実施例】次に、本発明の排水処理方法と従来の排水処
理方法とを実施した場合の具体例について説明する。こ
こで説明する例は、し尿処理場で行われたものであり、
当該尿処理場の規模と運転状況は、以下の通りである。Next, specific examples in which the wastewater treatment method of the present invention and the conventional wastewater treatment method are performed will be described. The example described here was performed at a human waste treatment plant,
The scale and operation status of the urine treatment plant are as follows.
【0028】設備設計値は、流入BOD量が6250mg
/l、処理可能量が130kl/日、BOD除去率が9
9%である。The equipment design value is that the inflow BOD amount is 6250 mg
/ L, treatable amount is 130 kl / day, BOD removal rate is 9
9%.
【0029】この設備において、前述の付加設備を設置
し、本発明の排水処理方法の具体的な実施法として、浄
化水を30分毎に採取し、NH3−N量を分析して、そ
の値が5mg/l以下となるように供給ポンプ4の供給速
度を調整して運転した。In this equipment, the above-mentioned additional equipment is installed, and as a specific method of performing the wastewater treatment method of the present invention, purified water is collected every 30 minutes, and the amount of NH3-N is analyzed. The operation was performed by adjusting the supply speed of the supply pump 4 so that the value was 5 mg / l or less.
【0030】表1は、その運転の際の微生物槽内におけ
る一応の目安となる一般的なORP値、DO値を表した
ものである。Table 1 shows general ORP values and DO values which are a rough guide in the microbial tank during the operation.
【0031】[0031]
【表1】 [Table 1]
【0032】本発明の方法では、実際にはORP値、D
O値、pHを表2に示すような値に維持することを目安
として運転した。In the method of the present invention, the ORP value, D
The operation was performed with reference to maintaining the O value and pH at the values shown in Table 2.
【0033】[0033]
【表2】 [Table 2]
【0034】この結果、本発明の排水処理方法では、従
来法と比較してその処理能力が表3に示すように約1.
8倍になった。As a result, as shown in Table 3, the wastewater treatment method of the present invention has a treatment capacity of about 1.
8 times.
【0035】[0035]
【表3】 [Table 3]
【0036】つまり、原水性状が変化しても、本発明の
排水処理方法では、微生物槽1への負荷が一定であるか
ら、微生物槽1は安定し、且つ浄化水質も一定で安定化
する。That is, even if the raw water state changes, in the wastewater treatment method of the present invention, the load on the microorganism tank 1 is constant, so that the microorganism tank 1 is stable and the purified water quality is also constant.
【0037】また、運転管理は、各計器により自動的に
行えるので、管理は単純化し、運転者に高度の熟練を求
める必要もなく、しかも浄化水質も安定するので、その
分析回数も少なくなり、この面で経費を削減できる。例
えば従来法では週3回の分析を行っていたのが、本発明
の方法によると週1回で良くなる。In addition, since the operation management can be automatically performed by each instrument, the management is simplified, and it is not necessary to require the driver to have a high level of skill. Further, the quality of purified water is stabilized, so that the number of times of analysis is reduced. Costs can be reduced in this respect. For example, according to the conventional method, the analysis is performed three times a week. However, according to the method of the present invention, the analysis can be performed once a week.
【0038】[0038]
【発明の効果】以上述べたように、本発明の排水処理方
法によれば、微生物槽への原水の供給量を当該微生物槽
の状態に応じて変化させることで、微生物槽の運転を微
生物活性の最も高い状況下での運転が可能となり、これ
により既存設備ではその能力の増加が図れ、新規設備で
はその規模を小さくすることができる。As described above, according to the wastewater treatment method of the present invention, the supply of raw water to the microbial tank is changed according to the state of the microbial tank, whereby the operation of the microbial tank can be controlled by the microbial activity. Can be operated under the highest conditions, thereby increasing the capacity of existing equipment and reducing the size of new equipment.
【図1】本発明の排水処理方法を実施するための設備の
概略構成を示す図である。FIG. 1 is a diagram showing a schematic configuration of equipment for carrying out a wastewater treatment method of the present invention.
【図2】従来の排水処理方法を実施するための設備の概
略構成を示す図である。FIG. 2 is a diagram showing a schematic configuration of equipment for performing a conventional wastewater treatment method.
1 微生物槽 4 供給ポンプ 5 制御装置 7 浄化水質測定器 Reference Signs List 1 Microbial tank 4 Supply pump 5 Control device 7 Purified water quality measuring instrument
Claims (1)
て、 原水の処理を行うための微生物槽に供給する当該原水の
供給量を、上記微生物槽で浄化された後の浄化水の水質
に応じて調整することを特徴とする排水処理方法。1. A wastewater treatment method according to an active body method, wherein a supply amount of raw water supplied to a microorganism tank for treating raw water is adjusted according to the quality of purified water purified by the microorganism tank. A wastewater treatment method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11058623A JP2000254680A (en) | 1999-03-05 | 1999-03-05 | Waste water treatment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11058623A JP2000254680A (en) | 1999-03-05 | 1999-03-05 | Waste water treatment |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2000254680A true JP2000254680A (en) | 2000-09-19 |
Family
ID=13089713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11058623A Pending JP2000254680A (en) | 1999-03-05 | 1999-03-05 | Waste water treatment |
Country Status (1)
Country | Link |
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JP (1) | JP2000254680A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006158996A (en) * | 2004-12-02 | 2006-06-22 | Kurita Water Ind Ltd | Nitrogen-containing wastewater treatment method and apparatus |
JP2011092942A (en) * | 2011-02-17 | 2011-05-12 | Kurita Water Ind Ltd | Nitrogen-containing wastewater treatment method and treatment apparatus |
-
1999
- 1999-03-05 JP JP11058623A patent/JP2000254680A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006158996A (en) * | 2004-12-02 | 2006-06-22 | Kurita Water Ind Ltd | Nitrogen-containing wastewater treatment method and apparatus |
JP2011092942A (en) * | 2011-02-17 | 2011-05-12 | Kurita Water Ind Ltd | Nitrogen-containing wastewater treatment method and treatment apparatus |
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