JPS5963567A - Method and device for measuring velocity in using oxygen - Google Patents
Method and device for measuring velocity in using oxygenInfo
- Publication number
- JPS5963567A JPS5963567A JP17401082A JP17401082A JPS5963567A JP S5963567 A JPS5963567 A JP S5963567A JP 17401082 A JP17401082 A JP 17401082A JP 17401082 A JP17401082 A JP 17401082A JP S5963567 A JPS5963567 A JP S5963567A
- Authority
- JP
- Japan
- Prior art keywords
- dissolved oxygen
- measurement container
- calibration
- measurement
- calibration solution
- 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
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 99
- 239000001301 oxygen Substances 0.000 title claims abstract description 99
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 59
- 238000005273 aeration Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000012937 correction Methods 0.000 claims abstract description 10
- 239000012482 calibration solution Substances 0.000 claims description 21
- 229920006395 saturated elastomer Polymers 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 9
- 230000036284 oxygen consumption Effects 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims 2
- 241000218691 Cupressaceae Species 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 7
- 238000011109 contamination Methods 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 238000004886 process control Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 101100110009 Caenorhabditis elegans asd-2 gene Proteins 0.000 description 1
- 102100037815 Fas apoptotic inhibitory molecule 3 Human genes 0.000 description 1
- 101000878510 Homo sapiens Fas apoptotic inhibitory molecule 3 Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001915 proofreading effect Effects 0.000 description 1
- WYROLENTHWJFLR-ACLDMZEESA-N queuine Chemical compound C1=2C(=O)NC(N)=NC=2NC=C1CN[C@H]1C=C[C@H](O)[C@@H]1O WYROLENTHWJFLR-ACLDMZEESA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Emergency Medicine (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野の説明〕
本発明は活性汚泥処理においでｆｉｌ、（、気槽内の混
合液の酊不利用速ｌｆ（全ｌ１１１１定する酸素第１１
用速度抑１冗方ン、１冊および伍［ｆに門−１−る。Detailed Description of the Invention [Description of the Technical Field] The present invention relates to activated sludge treatment in which the oxygen unutilization rate lf (total 1111
Use speed control 1 redundant, 1 book and 5 [f ni gate-1-ru].
し発明の技術的ＩＮ 、ｊｊＴ、 ；ｉ、−よｒ戸′間
顧点〕活性汚泥処即とは、１）９． ｔｙ（槽の汚性汚
泥中に存在する微生物が、汗水中（τ含寸ｊする有槓汚
燭物質を、水中の溶存酸素を利用して酸化することがら
なりたっている。微生物ｔｊ１有機汚濁物質の酸化のた
めに溶存酸素を利用するだけでなく、微生物自体が生命
を帷持するためにも溶存ド素を利用している。ｔｉｔ生
物がこのように溶存酸素を消費するため、活性汚泥処理
を効果的に行なうには、微生物の必要とするｊｐ隼を曝
気により供給する必要がある。TECHNICAL INVENTION OF THE INVENTION Activated sludge treatment means: 1) 9. The microorganisms present in the dirty sludge in the tank oxidize the pollutant substances in the sweat water (τ containing j) using the dissolved oxygen in the water. In addition to using dissolved oxygen for the oxidation of carbon dioxide, the microorganisms themselves also use dissolved oxygen to sustain life.Since activated sludge treatment In order to do this effectively, it is necessary to supply the microorganisms with aeration.
従って、微生物の酸素利用速度が活性汚泥処理における
重要な相律となる。Therefore, the oxygen utilization rate of microorganisms is an important phase law in activated sludge treatment.
従来の酸素利用速度測定装置は第１図に示す構造であっ
た。すなわち、２ Ｈ： ｉｆ！ＩＩ定容器で、１曝気
槽１内に没〃ｉされており、この測定容器２の内部の試
料水と接する位置に溶存酸素電極３を取付けている。こ
の溶存ｒ＋Ｑ塁？Ｔｔ極３の出力は溶存酸素１Ｈｌｌ
５ｉｉ器４に送られ、ここて溶存￥９．素沢度として測
定される。測定容器２の上部と下部にはそれぞれピンチ
パルプ等の開閉弁５と開閉弁６が設けてあり、それぞれ
ストレーナ７とストレーナ８が接続されている。９はス
タークで、測定容器２の外壁に取付けられ、測定容器２
内に設けた回転子ＩＯを回転駆動する。、１１は曝気用
空気供給口１１で、下部連通口の側壁に開口する。この
曝気用空気供給口１１および開閉弁５，６には電磁弁等
の開閉弁１．２，１３．１４ を介してコンプレッサ
、用装用空気等の空気供給３Ｑ；面１５が接続される。A conventional oxygen utilization rate measuring device had the structure shown in FIG. That is, 2 H: if! The measurement container 2 is a fixed container, which is submerged in an aeration tank 1, and a dissolved oxygen electrode 3 is attached to the inside of this measurement container 2 at a position in contact with the sample water. This dissolved r + Q base? The output of Tt electrode 3 is dissolved oxygen 1Hll
Sent to 5ii vessel 4, where it dissolves ￥9. It is measured as the degree of appearance. An on-off valve 5 and an on-off valve 6 made of pinch pulp or the like are provided at the upper and lower parts of the measurement container 2, respectively, and a strainer 7 and a strainer 8 are connected thereto, respectively. 9 is a stark, which is attached to the outer wall of the measuring container 2;
The rotor IO provided therein is driven to rotate. , 11 is an aeration air supply port 11, which opens in the side wall of the lower communication port. The aeration air supply port 11 and the on-off valves 5 and 6 are connected to a compressor and an air supply 3Q such as air for use through on-off valves 1.2 and 13.14 such as electromagnetic valves.
また開閉弁１２゜１３．１４およびスターク９は工程制
御装置１６に配線されて訃り、これにより予め設定され
た順序で動作指令を受ける。さらに溶存酸素測定器４と
配線されている演算処理器１７も工程制御装置１６と配
線されている。The opening/closing valves 12, 13, and 9 are wired to the process control device 16, thereby receiving operation commands in a preset order. Furthermore, the arithmetic processor 17 that is wired to the dissolved oxygen measuring device 4 is also wired to the process control device 16 .
上記構成において、測定に当っては、先ず開閉弁１．３
，１４ｒ−工稈制御装Ｒ１６で開制御し、スターク９を
駆動して回転子ＩＯを回転させ、測定容器２内の試イ２
１水を曝気槽１内の周囲の試料水と置換する。次に開閉
弁６ｆ：閉じ、ｌ’：４気用空気供給口１１から試料水
中に空気を供給して曝気する。この時、試料水中の溶存
酸ネ濃度を溶存酸素型１極３および溶存酸素測定器４に
より測定する。その結果、所定の溶存酸素濃度に達した
ことを演算処理器１７が判断すると工程制御装置１６に
より曝気を停止させる。次にスターン９衾停止し、開閉
弁５ヶ閉じ、気泡を含まない状態で試料水を測定容器ｚ
内に密封した後に、スターク９を再始動（７回転子１０
ケ回転させ試料水を撹拌しなから溶存酸素測定器４によ
り溶存酸素Ｐ度の減少を測定する。この溶存酸素濃度の
減少から演算処理器１７により酸素利用速度を算出する
。In the above configuration, in the measurement, first, the on-off valve 1.3
, 14r - Opening is controlled by the culm control device R16, the Stark 9 is driven to rotate the rotor IO, and the test tube 2 in the measurement container 2 is opened.
1 water is replaced with the surrounding sample water in the aeration tank 1. Next, the on-off valve 6f: closes, and l': air is supplied into the sample water from the 4-air air supply port 11 for aeration. At this time, the dissolved oxygen concentration in the sample water is measured using the dissolved oxygen type 1 pole 3 and the dissolved oxygen measuring device 4. As a result, when the arithmetic processor 17 determines that a predetermined dissolved oxygen concentration has been reached, the process control device 16 stops the aeration. Next, stop the turn 9, close the 5 on-off valves, and pour the sample water into the measuring container without containing any air bubbles.
After sealing the inside, restart Stark 9 (7 rotors 10
While stirring the sample water by rotating it, the decrease in dissolved oxygen P level is measured using the dissolved oxygen measuring device 4. The arithmetic processor 17 calculates the oxygen utilization rate from this decrease in dissolved oxygen concentration.
この酸素利用速度測定装置では測定を長期間継続すると
試料水中の汚物が測定容器２内に付着、堆積してくる。In this oxygen utilization rate measuring device, if the measurement is continued for a long period of time, dirt in the sample water will adhere and accumulate in the measurement container 2.
特に溶存酸素電極３表面と測定容器２の内壁に付着、堆
濯した汚物は測定誤差企生じる。また、溶存酸素電極３
は内部液および内部の検出電極の経時的な劣化によって
も測定値が変動する。従って、定期的に指示値の点検が
必要となる。点検は？ＩＩＩＩ ｊＦ容器２をＩＩ’７
気槽１外へ引出し、溶存酸素室＠３を測定容器２から泡
りはずした後、飽和溶存酸素溶液中に浸漬して行なう、
この点検および測定容器２の引上げと据付は作梨はわず
られしいうえに作業時間もかなりの長時間金製する。In particular, dirt adhering to and depositing on the surface of the dissolved oxygen electrode 3 and the inner wall of the measurement container 2 may cause measurement errors. In addition, dissolved oxygen electrode 3
The measured value also fluctuates due to deterioration of the internal liquid and internal detection electrode over time. Therefore, it is necessary to periodically check the indicated values. What about inspection? III jF container 2 II'7
After pulling out the air tank 1 and removing bubbles from the dissolved oxygen chamber @ 3 from the measurement container 2, immerse it in a saturated dissolved oxygen solution.
This inspection, lifting and installation of the measuring container 2 is laborious and requires a considerable amount of time.
また、測定容器２内壁に付着、堆積した汚物による測定
誤差の点検は適正な方法がなく、実施されていなかった
。しかし、実際には測定容器２内壁に付着、堆積した汚
物は溶存酸素を消費し、見かけの酸素利用速度を大きく
している。Furthermore, there is no proper method for checking measurement errors due to dirt adhering to and accumulating on the inner wall of the measuring container 2, and this has not been carried out. However, in reality, the dirt that adheres to and accumulates on the inner wall of the measurement container 2 consumes dissolved oxygen, increasing the apparent rate of oxygen utilization.
以上のとおり、これまでの酸素利用速度測定装置では定
期的に極めて煩雑な点検が必要なうえに、これを実施し
ても測定容器２内壁の汚れによる測定誤差は避けられな
かった。As described above, conventional oxygen utilization rate measuring devices require extremely complicated inspections on a regular basis, and even if they are carried out, measurement errors due to dirt on the inner wall of the measurement container 2 cannot be avoided.
本発明の目的は、溶存酸素電極の特性変化に対応する校
正値および測定容器内壁に付着、堆積した汚物による溶
存酸素の消費に対応する補正値を求めて正確な酸素利用
速度の測定を可能とし、かつこれら校正値や補正値を曝
気槽内に浸漬したま寸で求めることができる酸素利用遮
１ｆｌ’測′ｊｉ“方法および装置に：提供することに
ある。An object of the present invention is to obtain a calibration value that corresponds to changes in the characteristics of a dissolved oxygen electrode and a correction value that corresponds to the consumption of dissolved oxygen due to dirt that adheres to and accumulates on the inner wall of a measurement container, thereby making it possible to accurately measure the oxygen utilization rate. The object of the present invention is to provide a method and apparatus for measuring oxygen utilization and interception, and capable of determining these calibration values and correction values while immersed in an aeration tank.
本発明は、”）： ’＞１ ’ｌｌ円内連通可１１ピに
測定容器内に空気１：送って１ｌｌｌ定容器内の汚Ｚ１
．：を排除した後、校ｉＥ液を測定容器内に充漕させ、
この測定容器内の校正液供給口したからこの校正液が飽
和溶存酸素濃度に達する゛までＩＩ″、、Δ気し、この
曝気された校正液の温度を測定してこの測定値から温度
によって決するｆ＋：ｑ ｆｌｌ溶存酸素一度を求め、
かつ同じ校正液中に設けられた溶存配素電極に、ｌ：す
ＩＩ′ｌｌＩ定される飽和溶存酸素濃度全求め、これら
両ｐ）１和溶存酸素濃１川の差により溶存酸素電極の汚
れおよび経時特性変化に対応した校正値として求めたり
、前記校正液が飽和溶存酸素濃度に達する凍て曝気した
後この曝気を停止し、撹拌は継続した状態で溶存酸素濃
度を測定し、その単位時間当りの減小速度を求め、その
大きさを測定容器内壁に付着した汚物による酸素消費に
対応した補正値として求めることにより正確な酸素利用
速度の測定を可能とすると共に、これら校正値や補正値
を曝気槽内に浸漬したｆま求め得るように構成したもの
である。In the present invention, air 1:1 is sent into the measurement container to allow communication within the 11 circle, and the contamination Z1 in the 11 constant container is
．． : After removing, fill the measurement container with the calibration iE solution,
From the calibration solution supply port in this measuring container, the temperature of this aerated calibration solution is measured and the temperature is determined from this measurement value. f+:q fll dissolve oxygen once,
Also, the total saturated dissolved oxygen concentration determined by l:II'llI is determined for the dissolved oxygen electrode provided in the same calibration solution, and the difference in the dissolved oxygen concentration between these two p) 1. After the calibration solution reaches a saturated dissolved oxygen concentration, the aeration is stopped and the dissolved oxygen concentration is measured while stirring is continued. By determining the rate of decrease in oxygen permeability and determining its magnitude as a correction value corresponding to the oxygen consumption due to dirt adhering to the inner wall of the measurement container, it is possible to accurately measure the oxygen utilization rate, and also to calculate these calibration values and correction values. The structure is such that it is possible to determine the temperature of the water immersed in the aeration tank.
以下、本発明全図面に示す一実施例によ゛り詳細に説明
する。Hereinafter, the present invention will be explained in detail with reference to one embodiment shown in the drawings.
第２図は本発明による酸素利用ｊ宋度測定装置の一実施
例を示す構成図である。図において、２２は校正液供給
口で、測定容器２１の内の下部に開口する。この校正液
供給口２２は電磁弁等の開閉弁２３を介して校正液供給
口＠２４と接続する。FIG. 2 is a block diagram showing an embodiment of the oxygen utilization degree measuring device according to the present invention. In the figure, reference numeral 22 denotes a calibration solution supply port, which opens at the bottom of the measurement container 21. This calibration liquid supply port 22 is connected to a calibration liquid supply port @24 via an on-off valve 23 such as a solenoid valve.
校正液供給装置２４は、純水、水道水等の、飽和溶存酸
素溶液となりうる液体を加圧して供給するもので、工程
制御装ｆｆ２５により制御される８また、上部のストレ
ーナ２６は配管２７を介して上部開閉弁５に接続される
。上記配管２７１−を一端が開閉弁５の上部に接続され
、瞭気槽１の水面に向かって延びた後に曲折し、曝気槽
１水面方向とは反対に向かって延びた他端がストレーナ
２６と接続されている。２８は温度センサで、測定容器
２１の側壁に設けである。この温度センサ２８は温度測
定器２９に配線され、温度ｔｎｌｌ定器２９は演算処理
器３０に配線されている。The calibration liquid supply device 24 supplies a pressurized liquid that can become a saturated dissolved oxygen solution, such as pure water or tap water, and is controlled by a process control device ff25. It is connected to the upper opening/closing valve 5 via. One end of the pipe 271- is connected to the upper part of the on-off valve 5, extends toward the water surface of the aeration tank 1, and then bends, and the other end, which extends in the opposite direction to the water surface of the aeration tank 1, is connected to the strainer 26. It is connected. A temperature sensor 28 is provided on the side wall of the measurement container 21. This temperature sensor 28 is wired to a temperature measuring device 29, and the temperature tnll constant device 29 is wired to an arithmetic processor 30.
次に本発明の作用についで説明する。測定時は第１図に
より説明した従来の酸素利用速度測定装丁Ｎと同一の操
作を行なう。次に溶存酸素電極３の経時的な特性変化を
点検する場合には、まず測定容器２１内に溜っていた試
料水（汚水）全曝気槽ｌ内に向って排除する。このため
には開閉弁６を開へ、開閉弁５を閉じ、曝気用空気供給
口１１から測定容器２１内に空気を満たす、続いて、開
閉弁６を閉じた後、開閉弁５ヶ開き、曝気用空気供給口
ｌｌがら空気を供給し配管２７内に空気を満たす。再び
、開閉弁５ｔ−閉じ、開閉弁６を開き曝気用空気供給口
１１がら空気を供給することで、測定容器２１内と配管
２７内に空気を満たす。この動作により測定容器２１内
の試料水はほぼ完全に排除される。次に開閉弁６を閉じ
た後に開閉弁５を開いた状態で、校正液供給口２２から
純水、水道水等の校正液金、測定容器２１円から溢れる
まで供給する。このことで測定容器２１内を校正液で確
実に満たすことができる。次にスターン９を駆動し回転
子１０で校正液を撹拌しながら曝気用空気供給ｍ１ｌｌ
がら空気全供給し、校正液を曝気する。、１１謬気は測
定容器２１内の校正液が飽和溶存酸素濃度に封建するま
で行なう。一般には０．５〜２ｔ／分の曝気空気渡欧で
１〜１０分間曝気ずれは飽和溶存酸素り度に達する。こ
の飽和溶存酸素濃度の校正液を溶存酸素［極３および溶
存酸素測定器４で測定する。一方、温度センサ２８およ
び温度測定器２９により校正液の水温を測定する。飽和
溶存ｉ′ｌ＃素濃度は水温により変化するが、その値は
既知である。従って、測定した校正液の水温から既知の
飽和溶存酸素濃度がわかる。この既知の飽和溶存酸素濃
度と溶存酸素測定器４による実際の測定値との差が、溶
存ｒｐ、素電極３の汚れおよび電極個有の経時的特性変
化である。Next, the operation of the present invention will be explained. At the time of measurement, the same operation as in the conventional oxygen utilization rate measuring device N explained with reference to FIG. 1 is performed. Next, when checking the change in characteristics of the dissolved oxygen electrode 3 over time, first all sample water (sewage) accumulated in the measurement container 21 is discharged into the aeration tank 1. To do this, open the on-off valve 6, close the on-off valve 5, fill the measurement container 21 with air from the aeration air supply port 11, then close the on-off valve 6, open the five on-off valves, Air is supplied from the aeration air supply port ll to fill the pipe 27 with air. The on-off valve 5t is closed again, the on-off valve 6 is opened, and air is supplied through the aeration air supply port 11, thereby filling the measuring container 21 and the piping 27 with air. By this operation, the sample water in the measurement container 21 is almost completely removed. Next, after closing the on-off valve 6, with the on-off valve 5 open, a calibration liquid such as pure water or tap water is supplied from the calibration liquid supply port 22 until it overflows from the measurement container 21 yen. This allows the measurement container 21 to be reliably filled with the calibration liquid. Next, drive the stern 9 and supply air for aeration while stirring the calibration solution with the rotor 10.
Aerate the calibration solution by supplying a full supply of air. , 11 errors are carried out until the calibration solution in the measurement container 21 reaches the saturated dissolved oxygen concentration. Generally, the aeration deviation reaches the saturated dissolved oxygen level for 1 to 10 minutes at an aeration air flow rate of 0.5 to 2 t/min. This saturated dissolved oxygen concentration calibration solution is measured using dissolved oxygen [electrode 3 and dissolved oxygen measuring device 4]. On the other hand, the temperature sensor 28 and temperature measuring device 29 measure the water temperature of the calibration liquid. The saturated dissolved i′l# element concentration changes depending on the water temperature, but its value is known. Therefore, the known saturated dissolved oxygen concentration can be determined from the measured water temperature of the calibration solution. The difference between this known saturated dissolved oxygen concentration and the actual value measured by the dissolved oxygen measuring device 4 is the dissolved RP, the dirt on the elementary electrode 3, and the change in characteristics specific to the electrode over time.
このようにして、測定容器２１と溶存酸素電極３を曝気
槽１に浸漬した状態で、曝気槽１外における操作で溶存
酸素Ｎ極３の特性変化を点検てきる。特性変化を確認し
た場合には溶存酸素測定器４を校正する。この校正しｔ
溶存酸素測定器４と温度測定器２９からの信号により演
算処理器３０で自動的に行なうこともできろ。In this way, with the measurement container 21 and the dissolved oxygen electrode 3 immersed in the aeration tank 1, changes in the characteristics of the dissolved oxygen N electrode 3 can be inspected by operations outside the aeration tank 1. If a change in characteristics is confirmed, the dissolved oxygen measuring device 4 is calibrated. This proofreading
It may also be possible to perform this automatically by the arithmetic processor 30 using signals from the dissolved oxygen measuring device 4 and the temperature measuring device 29.
」二記溶存酸素電極３の点検を実施後、曝気を停＋ｌ−
，Ｌ、スター２９による撹拌は継続１．た状態で校正液
の溶存酸素濃度を測定する。ここで、測定容器２１内壁
に汚物が付着、堆積した場合としない場合で）よ、溶存
酸素減少の経時的変化に第３図に示すような差が生じる
。第３図に示し几実＠ａは測定容器２１内壁に汚物の付
着、堆積がない場合の測定結果であり一１溶存酸素濃度
の減少速度ｒこれに対し、測定容器２１内壁に汚物が付
着、堆積した場合には第３図実椋すに示したように溶存
酸素の減少速度が大きくあられれる。”After inspecting the dissolved oxygen electrode 3, stop the aeration +l-
, L, stirring by star 29 continues 1. Measure the dissolved oxygen concentration in the calibration solution. Here, a difference as shown in FIG. 3 occurs in the change over time in the decrease in dissolved oxygen depending on whether or not dirt adheres to or accumulates on the inner wall of the measurement container 21. Figure 3 shows the measurement result when there is no adhesion or accumulation of dirt on the inner wall of the measurement container 21.11 Reduction rate of dissolved oxygen concentration If it accumulates, the rate of decrease in dissolved oxygen will be large, as shown in Figure 3.
従って、酸素利用速度測定における溶存酸素濃度減少が
試料水中の微生物による酸素消費だけでなく、測定容器
２１内壁に付着、堆積した汚物によるｅ、素消費、すな
わち、実線ａと実線すの差との合計となるため、酸素利
用速度が犬きくなる。Therefore, the decrease in dissolved oxygen concentration in oxygen utilization rate measurement is not only due to oxygen consumption by microorganisms in the sample water, but also due to e and elementary consumption due to dirt attached and deposited on the inner wall of the measurement container 21, that is, the difference between solid line a and solid line Since it is a total, the oxygen utilization rate becomes faster.
以上のことから、溶存酸素１！極３の点検後、スター２
９は継続して駆動させ、曝気を停止し、校正液の溶存酸
素減少を溶存酸素減少３および溶存酸素測定器４により
測定する。これにより′測定容器２１内に付着堆積した
汚物による溶存酸素の消費を点検でき、汚物による消費
が確認された場合には酸素利用速度測定値を補正する。From the above, dissolved oxygen 1! Star 2 after pole 3 inspection
9 continues to drive, stops aeration, and measures the decrease in dissolved oxygen in the calibration solution using the dissolved oxygen decrease 3 and the dissolved oxygen measuring device 4. As a result, it is possible to check the consumption of dissolved oxygen by the filth deposited in the measurement container 21, and if consumption by filth is confirmed, the measured value of the oxygen utilization rate is corrected.
この補正社測定値を人手により計算しても実施できるが
、わずられしいため演算処理器３０により自動補正する
と効率的である。Although this correction measurement value can be calculated manually, it is troublesome, so it is more efficient to automatically correct it using the arithmetic processor 30.
前記説明は溶存酸素電極３の特性変イヒと測定容器２１
内壁の汚れによる酸素消費の点検および校正についての
みであるが、それぞれの校正量の積算値を演算処理器３
０に演算記憶させ、この値があらかじめ設定しであるそ
れぞれの許容値に刺違した場合に、測定容器２１内壁と
溶存酸素電極３の洗浄等が必要となったことを表示させ
ることもできる。The above explanation describes the changes in the characteristics of the dissolved oxygen electrode 3 and the measurement container 21.
This is only for inspection and calibration of oxygen consumption due to dirt on the inner wall, but the integrated value of each calibration amount is calculated by the arithmetic processor 3.
It is also possible to calculate and store the value as 0, and to display that the inner wall of the measurement container 21 and the dissolved oxygen electrode 3 need to be cleaned when this value reaches a preset tolerance value.
以上の説明で明らかなとおり、本発明の酸素利用速度測
定方法および装置によれば、溶存酸素電極の特性変化に
対応する校正値および測定容器内壁の汚れによる溶を東
素消費に対応する補正値が求められるので、正確な酸素
利用に、度の測定が可能になると共に、前記校正量およ
び補正値を測定時と同様に測定容器および溶存＊素電極
を曝気槽に浸漬した状態で容易に実施することができる
。As is clear from the above explanation, according to the oxygen utilization rate measuring method and device of the present invention, a calibration value corresponding to the characteristic change of the dissolved oxygen electrode and a correction value corresponding to the dissolution due to the dirt on the inner wall of the measurement container and the TOSO consumption are obtained. Therefore, it is possible to measure the degree of oxygen for accurate oxygen utilization, and the above-mentioned calibration amount and correction value can be easily carried out with the measurement container and dissolved* elementary electrode immersed in the aeration tank in the same way as during measurement. can do.
第１図は従来装置を示す構成図、第２図は本発明による
酸素利用速度測定方法に用いる装置の一実施例を示す構
成図、第３図は経過時間と溶存酸素＃度との関係の一測
定例を示す説明図である。
１・・・曝気槽 ３・・・溶存酸素電極４・・・
溶存酸素測定器
５．６・・・開閉弁 ９．１０ ・・・撹拌装置
１１・・・１１％気用空気供給口
１２．１３，１４．２３・・・開閉弁
１５・・・空気供給装？ ２１・・・測定容器２２・
・・校正液供給口 ２４・・・校正液供給装置２７・・
・配管 ２Ｂ・・・温度センサ２９・・・温度
測定器
（７３１７） 化ｌＴ１１人 弁理士 則 近 ５だ
佑 （はが１名）第１図
第２図
、’１’ｉ ３ 図Fig. 1 is a block diagram showing a conventional device, Fig. 2 is a block diagram showing an embodiment of the device used in the oxygen utilization rate measuring method according to the present invention, and Fig. 3 is a diagram showing the relationship between elapsed time and dissolved oxygen degree. FIG. 2 is an explanatory diagram showing one measurement example. 1... Aeration tank 3... Dissolved oxygen electrode 4...
Dissolved oxygen measuring device 5.6... Opening/closing valve 9.10... Stirring device 11... 11% air supply port 12.13, 14.23... Opening/closing valve 15... Air supply device ? 21...Measurement container 22.
...Calibration liquid supply port 24...Calibration liquid supply device 27...
・Piping 2B...Temperature sensor 29...Temperature measuring device (7317) 11 patent attorneys Yuki Chika 5 (1 person) Figure 1 Figure 2, '1'i 3 Figure
Claims (1)
て測定容器内の汚水を排除Ｉ７た後、校正液を測定容器
内に充満させ、この測定容器内の校正液を撹拌しながら
この校正液が飽和溶存酸素濃度に達するまでｐ″′Ａ気
し、この曝気された校正液の温度を測定してこの測定値
から温度によって決凍る飽和溶存酸素濃度を求め、かつ
同じ校正液中に設けられた溶存酸素電極により測定され
る飽和溶存酸素ｐ度を求め、これら両飽和溶存酸素濃度
の差に送って測定容器内の汚水を排除した後、校正液を
測定容器内に充沸させ、この測定容器内の校正液を撹拌
しなからこの校正液が飽和溶存ｉ素濃度に達するまで曝
気した後この曝気を停止し、攪拌は継続した状態で溶存
酸ネ濃度を測定し、その単位時間当りの減小速度を求め
、その大きさを測定容器内壁に付着した汚物による酸素
消費に対応１．た補正値として求めることを特徴とする
酸素利用速度測定方法。 （３）内部にｌｌ’％気用空気供給口をもち上部と下部
に曝気槽内との連通用の開閉弁を設けた測定容器と、こ
の測定容器に取りつけられた溶存酸素電極およびこの溶
存酸素電極からの信号により溶存酸素濃度を測定する溶
存酸素電極器と、前記測定容器内の液体を撹拌する装置
と、測定容器の内部に設けた校正液供給口およびこの校
正液供給口に校正液を供給するだめの校正液供給装置と
、一端は測定容器上部の開閉弁に接続さＣ他端は際気槽
水面方向と反対方向に開口する配管と、校正液の水温を
測定する温度センサおよび温度測足器とを設けたことを
特徴とする酸素利用速度測定装置。[Scope of Claims] (1) 1. After removing the waste water in the measurement container by sending air into the measurement container so that it can communicate with the inside of the cypress, the measurement container is filled with a calibration solution. While stirring the calibration solution in the container, aerate the calibration solution with p''A until it reaches the saturated dissolved oxygen concentration, measure the temperature of this aerated calibration solution, and calculate the saturated dissolved oxygen that freezes depending on the temperature from this measured value. Calculate the concentration, and calculate the saturated dissolved oxygen p degree measured by a dissolved oxygen electrode installed in the same calibration solution, send it to the difference between these two saturated dissolved oxygen concentrations, and after removing the waste water in the measurement container, perform the calibration. Boil the solution in the measurement container, and aerate the calibration solution in the measurement container without stirring until it reaches the saturated concentration of dissolved i, then stop the aeration, and continue stirring to remove the dissolved i. Oxygen utilization rate measurement characterized by measuring the acid concentration, determining its rate of decrease per unit time, and determining its magnitude as a correction value corresponding to oxygen consumption due to filth attached to the inner wall of the measurement container. Method. (3) A measurement container with an internal air supply port and an on-off valve for communicating with the inside of the aeration tank at the top and bottom, a dissolved oxygen electrode attached to this measurement container, and a dissolved oxygen electrode attached to this measurement container. A dissolved oxygen electrode device that measures dissolved oxygen concentration using a signal from a dissolved oxygen electrode, a device that stirs the liquid in the measurement container, a calibration solution supply port provided inside the measurement container, and a calibration solution installed in this calibration solution supply port. A calibration liquid supply device for supplying liquid, one end connected to the on-off valve at the top of the measurement container, a pipe opening in the opposite direction to the water surface of the air tank at the other end, and a temperature sensor for measuring the water temperature of the calibration liquid. and a temperature measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17401082A JPS5963567A (en) | 1982-10-05 | 1982-10-05 | Method and device for measuring velocity in using oxygen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17401082A JPS5963567A (en) | 1982-10-05 | 1982-10-05 | Method and device for measuring velocity in using oxygen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5963567A true JPS5963567A (en) | 1984-04-11 |
| JPH0464026B2 JPH0464026B2 (en) | 1992-10-13 |
Family
ID=15971060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17401082A Granted JPS5963567A (en) | 1982-10-05 | 1982-10-05 | Method and device for measuring velocity in using oxygen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5963567A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2280431A (en) * | 1992-03-27 | 1995-02-01 | Thames Water Utilities | Apparatus and method for monitoring condition of a biomass |
| CN113916849A (en) * | 2021-09-10 | 2022-01-11 | 山东省科学院海洋仪器仪表研究所 | Calibration method and calibration device for optical dissolved oxygen sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797432A (en) * | 1980-12-09 | 1982-06-17 | Daido Steel Co Ltd | Oxygen meter and its using method |
-
1982
- 1982-10-05 JP JP17401082A patent/JPS5963567A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797432A (en) * | 1980-12-09 | 1982-06-17 | Daido Steel Co Ltd | Oxygen meter and its using method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2280431A (en) * | 1992-03-27 | 1995-02-01 | Thames Water Utilities | Apparatus and method for monitoring condition of a biomass |
| GB2280431B (en) * | 1992-03-27 | 1995-06-07 | Thames Water Utilities | Apparatus and method for monitoring condition of a biomass |
| US5807699A (en) * | 1992-03-27 | 1998-09-15 | Thames Water Utilities Limited | Apparatus and method for monitoring condition of a biomass |
| CN113916849A (en) * | 2021-09-10 | 2022-01-11 | 山东省科学院海洋仪器仪表研究所 | Calibration method and calibration device for optical dissolved oxygen sensor |
| WO2023035386A1 (en) * | 2021-09-10 | 2023-03-16 | 山东省科学院海洋仪器仪表研究所 | Method and apparatus for calibrating optical dissolved oxygen sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0464026B2 (en) | 1992-10-13 |
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