JPS62227499A - Batchwise treatment of activated sludge - Google Patents
Batchwise treatment of activated sludgeInfo
- Publication number
- JPS62227499A JPS62227499A JP61070092A JP7009286A JPS62227499A JP S62227499 A JPS62227499 A JP S62227499A JP 61070092 A JP61070092 A JP 61070092A JP 7009286 A JP7009286 A JP 7009286A JP S62227499 A JPS62227499 A JP S62227499A
- Authority
- JP
- Japan
- Prior art keywords
- orp
- sewage
- limit value
- preset
- oxygen
- 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.)
- Granted
Links
- 239000010802 sludge Substances 0.000 title claims description 13
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000010865 sewage Substances 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 6
- 239000002351 wastewater Substances 0.000 claims description 18
- 238000005273 aeration Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 2
- 239000006228 supernatant Substances 0.000 claims description 2
- 230000033116 oxidation-reduction process Effects 0.000 claims 2
- 238000010923 batch production Methods 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 21
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- VTEIFHQUZWABDE-UHFFFAOYSA-N 2-(2,5-dimethoxy-4-methylphenyl)-2-methoxyethanamine Chemical compound COC(CN)C1=CC(OC)=C(C)C=C1OC VTEIFHQUZWABDE-UHFFFAOYSA-N 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 5
- 239000011574 phosphorus Substances 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000006396 nitration reaction Methods 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は汚水の処理方法に係り、特に単一処理槽内で
汚水を生物学的に処理したのち、処理水を排出すること
を繰り返す回分式活性汚泥処理方法に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method for treating wastewater, and in particular a method for treating wastewater biologically in a single treatment tank and then discharging the treated water repeatedly. This invention relates to an activated sludge treatment method.
回分式活性汚泥処理方法は、単一槽内に流入させた汚水
を間欠的に曝気する間欠曝気工程、沈殿銀によって汚水
中のＢＯＤ及び窒素、りんを除去する方法である。 ゛
しかし、間欠曝気工程における間欠曝気をあらかじめ設
定した時間に基づいて繰り返す従来の方法によれば、特
に汚水の窒素濃度が少ないときには十分な硝化時間が得
られるけれども脱窒時間が不足する傾向を示し、また汚
水の窒素濃度が多いときにはその逆の現象が生じるため
、窒素除去性能が一定せず、汚水の水質変動に追従でき
ないという欠点があった。The batch activated sludge treatment method is a method of removing BOD, nitrogen, and phosphorus from the sewage using an intermittent aeration step in which sewage flowing into a single tank is intermittently aerated, and precipitated silver. However, according to the conventional method in which intermittent aeration in the intermittent aeration process is repeated based on a preset time, although sufficient nitrification time can be obtained, especially when the nitrogen concentration of wastewater is low, there is a tendency for denitrification time to be insufficient. Moreover, when the nitrogen concentration of wastewater is high, the opposite phenomenon occurs, so the nitrogen removal performance is not constant and there is a drawback that it cannot follow changes in the water quality of wastewater.
この発明の目的は、汚水の水質変動があっても汚水中の
ＢＯＤ、窒素、りんを安定して除去することができる回
分式活性汚泥処理方法を提供するにある。An object of the present invention is to provide a batch activated sludge treatment method that can stably remove BOD, nitrogen, and phosphorus from wastewater even if the water quality of the wastewater changes.
この発明は、汚水中の有機物や窒素化合物の分における
前記間欠曝気工程での間欠曝気を制御するようにしたも
のである。すなわち、間欠曝気工程においては、汚水を
連続的に流入させながら、汚水のＯＲＰを検出し、予め
設定した下限値で酸素含有ガスを供給し、予め設定した
上限値で酸素含有ガスの供給を停止することによって間
欠曝気操作を制御することを特徴とする。ＯＲＰの設定
値は汚水の温度が低いときは相対的に高く設定し、汚水
の温度が高いときは相対的に低く設定することがやまし
い。In this invention, intermittent aeration in the intermittent aeration step is controlled to account for organic substances and nitrogen compounds in wastewater. In other words, in the intermittent aeration process, the ORP of the wastewater is detected while the wastewater is continuously flowing in, oxygen-containing gas is supplied at a preset lower limit value, and the supply of oxygen-containing gas is stopped at a preset upper limit value. It is characterized by controlling intermittent aeration operation by. It is preferable that the set value of ORP is set relatively high when the temperature of wastewater is low, and set relatively low when the temperature of wastewater is high.
次に本発明の実施例について説明する。第１図に本発明
に係る回分式活性汚泥処理装置を示す。Next, examples of the present invention will be described. FIG. 1 shows a batch type activated sludge treatment apparatus according to the present invention.
装置は処理槽１、水中撹拌機２、空気吹込み機３、処理
水排出装置５及び余剰汚泥引抜きポンプ６から構成され
ている。The apparatus is composed of a treatment tank 1, an underwater agitator 2, an air blower 3, a treated water discharge device 5, and an excess sludge drawing pump 6.
処理槽の容量は２４ｍ３で、１サイクル当りの入する。The capacity of the treatment tank is 24 m3, which can be filled per cycle.
処理槽に設けたＯＲＰ指示調節計４で汚水のＯＲＰを検
出し、その指示値が予め設定したＯＲＰ下限値に達した
とき空気吹込み機３で酸素の供給を行い、ここで汚水の
有機物の分解、有機体及びアンモニア体窒素の硝化が行
われる。The ORP of the sewage is detected by the ORP indicator controller 4 installed in the treatment tank, and when the indicated value reaches the preset ORP lower limit value, oxygen is supplied by the air blower 3, and the organic matter in the sewage is removed. Decomposition, nitrification of organic and ammonia nitrogen takes place.
硝化反応が進み、汚水のＯＲＰは徐々に上昇し、予め設
定したＯＲＰ上限値に達したとき空気吹込み機３を停止
させる。この状態で処理槽中の溶存酸素濃度は徐々に低
下し、無酸素の雰囲気となり、硝化反応で生成した亜硝
酸及び硝酸体窒素は窒素ガスに還元される。この脱窒反
応の進行によって汚水のＯＲＰは低下するので、ＯＲＰ
下限値に達したときに再び空気吹込み機３で酸素を供給
する。As the nitrification reaction progresses, the ORP of the wastewater gradually rises, and when it reaches a preset ORP upper limit, the air blower 3 is stopped. In this state, the dissolved oxygen concentration in the treatment tank gradually decreases, creating an oxygen-free atmosphere, and the nitrite and nitrate nitrogen produced by the nitrification reaction are reduced to nitrogen gas. As the denitrification reaction progresses, the ORP of wastewater decreases, so the ORP
When the lower limit value is reached, oxygen is supplied again by the air blower 3.
以上に述べた間欠曝気を数回繰り返すことによって、汚
水中のＢＯＤ、窒素、りんが効果的に除去される。この
間欠曝気工程を３〜８時間、好ましくは４〜６時間行い
、この間、汚水を連続的に流工程では処理槽■内の汚水
は当初は水面が低く、工程の終了時では汚水量が増加し
て水面が高くなるように運転される。By repeating the intermittent aeration described above several times, BOD, nitrogen, and phosphorus in wastewater are effectively removed. This intermittent aeration process is carried out for 3 to 8 hours, preferably 4 to 6 hours, and during this period, the sewage is continuously flowed.In the process, the water level of the sewage in the treatment tank is initially low, and the amount of sewage increases at the end of the process. It is operated so that the water level is high.
ＯＲＰ下限値は一５０〜ＬＯＯｍＶ、またＯＲＰ上限値
は１００〜１６０ ｍＶの範囲に設定することが望まし
い。さらに上・下限の設定中は３０〜１２０ ｍＶであ
ることが望ましい。It is desirable that the ORP lower limit value be set in the range of -50 to LOOmV, and the ORP upper limit value be set in the range of 100 to 160 mV. Furthermore, it is desirable that the upper and lower limits are set at 30 to 120 mV.
次に沈殿工程で処理槽１内の汚泥を静置沈降させたのち
排出工程に移り、この工程で処理水排出装置５を作動さ
せ上澄水である処理水を装置外へ排出する。また増殖し
た余剰の汚泥は余剰汚泥引抜きポンプ６で引抜（ことで
処理槽１内での汚泥量を一定に維持する。第１表に前記
装置を用い汚水として下水を処理した実験結果を従来法
と比較して示す。従来法は間欠曝気工程における曝気時
間を２０分、曝気停止時間を４０分として繰り返した場
合であり１．本発明法は前記のように間欠曝気工程と本
発明法では同等であるが、Ｔ−Ｎは本発明法の方が著し
く低く、本発明法は窒素除去性能が格別にすぐれている
。Next, in the sedimentation step, the sludge in the treatment tank 1 is left to settle, and then the process moves to the discharge step, in which the treated water discharge device 5 is operated to discharge the treated water, which is supernatant water, out of the device. In addition, the surplus sludge that has grown is extracted by the surplus sludge extraction pump 6 (thereby, the amount of sludge in the treatment tank 1 is maintained constant). The conventional method is a case where the aeration time in the intermittent aeration process is repeated for 20 minutes and the aeration stop time is 40 minutes.1.The method of the present invention is equivalent to the intermittent aeration process and the method of the present invention as described above. However, TN is significantly lower in the method of the present invention, and the method of the present invention has exceptionally excellent nitrogen removal performance.
第 １ 表
第２図にＯＲＰの上限及び下限設定値の好ましい範囲を
示す。第２図から分るように、上・下限の設定値は水温
に応じて調節することが好ましい。Table 1 and FIG. 2 show preferred ranges for the upper and lower set values of ORP. As can be seen from FIG. 2, it is preferable to adjust the upper and lower limit set values according to the water temperature.
これは水温の低下とともに硝化・脱窒菌及びＢＯＤ酸化
菌の生物反応速度が遅くなることに基因し、この生物反
応速度とＯＲＰの追従する速度との相違から起るものと
考えられる。This is thought to be due to the fact that the biological reaction rate of nitrifying/denitrifying bacteria and BOD oxidizing bacteria slows down as the water temperature decreases, and is caused by the difference between this biological reaction rate and the rate followed by ORP.
ＯＲＰの上・下限の設定値を水温によって変化させるに
は、水温に基づいて人為的に設定替えを行うか、もしく
は電気回路によってＯＲＰの上・下限設定値を自動的に
変化させる補正機構を設けてもよい。To change the ORP upper and lower limit settings depending on the water temperature, either manually change the settings based on the water temperature, or install a correction mechanism that automatically changes the ORP upper and lower limit settings using an electric circuit. It's okay.
対応して、汚水中のＢＯＤ、窒素、りんを安定して除去
することができる。特に窒素除去性能が格段にすぐれて
いる。Correspondingly, BOD, nitrogen, and phosphorus in wastewater can be stably removed. In particular, it has excellent nitrogen removal performance.
第１図は本発明を実施するための装置構成図、第２図は
本発明のＯＲＰ制御による設定値の好ましい範囲を示す
図である。
」・・・処理槽、 ３・・・空気吹込み機：４
・・・ＯＲＰ指示調節計、 ５・・・処理水排出装
置。
第１図
第２図
東 Ａ（’Ｃ）FIG. 1 is a diagram showing the configuration of an apparatus for implementing the present invention, and FIG. 2 is a diagram showing a preferable range of set values by ORP control of the present invention. ”...Treatment tank, 3...Air blower: 4
... ORP indicating controller, 5... Treated water discharge device. Figure 1 Figure 2 East A ('C)
Claims (1)
間欠曝気工程、沈殿工程及び上澄水の排出工程の各工程
を単一処理槽内で順次１サイクルとして行う回分式活性
汚泥処理方法において、前記間欠曝気工程での汚水の酸
化還元電位を検出し、予め設定した下限値で酸素含有ガ
スを供給し、予め設定した上限値で酸素含有ガスの供給
を停止することによつて、間欠曝気操作を制御すること
を特徴とする回分式活性汚泥処理方法。 ２、特許請求の範囲第１項に記載した酸化還元電位の上
限または下限の設定値を汚水の温度に対応して低い温度
では高く、高い温度では低く設定することを特徴とする
回分式活性汚泥処理方法。[Scope of Claims] 1. A batch process in which the intermittent aeration step in which sewage is continuously introduced and aeration is performed intermittently, the precipitation step, and the supernatant water discharging step are performed sequentially as one cycle in a single treatment tank. In the activated sludge treatment method, the oxidation-reduction potential of wastewater in the intermittent aeration step is detected, oxygen-containing gas is supplied at a preset lower limit value, and the supply of oxygen-containing gas is stopped at a preset upper limit value. A batch activated sludge treatment method characterized by controlling intermittent aeration operation. 2. Batch-type activated sludge, characterized in that the upper or lower limit of the oxidation-reduction potential set forth in claim 1 is set higher at lower temperatures and lower at higher temperatures in accordance with the temperature of wastewater. Processing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61070092A JPS62227499A (en) | 1986-03-28 | 1986-03-28 | Batchwise treatment of activated sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61070092A JPS62227499A (en) | 1986-03-28 | 1986-03-28 | Batchwise treatment of activated sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62227499A true JPS62227499A (en) | 1987-10-06 |
| JPH0442078B2 JPH0442078B2 (en) | 1992-07-10 |
Family
ID=13421550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61070092A Granted JPS62227499A (en) | 1986-03-28 | 1986-03-28 | Batchwise treatment of activated sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62227499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0291000A (en) * | 1988-09-27 | 1990-03-30 | Inax Corp | Batch-wise type soil water treatment process |
| JP2021030158A (en) * | 2019-08-23 | 2021-03-01 | オルガノ株式会社 | Water treatment method and water treatment equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56161892A (en) * | 1980-05-17 | 1981-12-12 | Hiroshi Kishi | Unstationary active sludge process |
| JPS6064698A (en) * | 1983-09-19 | 1985-04-13 | Masahiro Masuda | Controlling apparatus of activated sludge process |
| JPS6115793A (en) * | 1984-06-29 | 1986-01-23 | Ebara Infilco Co Ltd | Treatment of organic waste water |
-
1986
- 1986-03-28 JP JP61070092A patent/JPS62227499A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56161892A (en) * | 1980-05-17 | 1981-12-12 | Hiroshi Kishi | Unstationary active sludge process |
| JPS6064698A (en) * | 1983-09-19 | 1985-04-13 | Masahiro Masuda | Controlling apparatus of activated sludge process |
| JPS6115793A (en) * | 1984-06-29 | 1986-01-23 | Ebara Infilco Co Ltd | Treatment of organic waste water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0291000A (en) * | 1988-09-27 | 1990-03-30 | Inax Corp | Batch-wise type soil water treatment process |
| JP2021030158A (en) * | 2019-08-23 | 2021-03-01 | オルガノ株式会社 | Water treatment method and water treatment equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0442078B2 (en) | 1992-07-10 |
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