JP3442301B2 - Water quality management system - Google Patents
Water quality management systemInfo
- Publication number
- JP3442301B2 JP3442301B2 JP34690398A JP34690398A JP3442301B2 JP 3442301 B2 JP3442301 B2 JP 3442301B2 JP 34690398 A JP34690398 A JP 34690398A JP 34690398 A JP34690398 A JP 34690398A JP 3442301 B2 JP3442301 B2 JP 3442301B2
- Authority
- JP
- Japan
- Prior art keywords
- protozoa
- water
- filter
- pond
- entrance
- 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.)
- Expired - Fee Related
Links
Landscapes
- Filtration Of Liquid (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、浄水場の水質を管
理する水質管理システムに関するものである。TECHNICAL FIELD The present invention relates to a water quality management system for managing the water quality of a water purification plant.
【０００２】[0002]
【従来の技術】浄水場は、河川等から取水した原水を浄
化し、水道水にして家庭等に供給する施設である。浄水
場がどのような手順で水を浄化するかについて説明す
る。2. Description of the Related Art A water purification plant is a facility that purifies raw water taken from a river or the like, converts it into tap water, and supplies it to households. Explain how the water purification plant purifies water.
【０００３】図４は浄水場の概略構成図である。図４
で、取水ポンプ４０は、河川等から原水を取り入れる。
取り入れた原水はフロック形成池４１に導かれる。フロ
ック形成池４１の前で凝集剤が投入され、投入した凝集
剤が原水中の塵埃等とともに粒子を形成する。この粒子
をフロックという。フロック形成池４１では、フロキュ
レータという水車が回っている。フロック形成池４１を
通過した水は、沈殿池に導かれる。沈殿池４２では、フ
ロックが沈殿する。沈殿池４２の上澄みがろ過池４３に
供給される。これによって、原水中に混入された塵埃等
が除去される。ろ過池４３では、沈殿池４２で仕分けた
上澄みがフィルタ４４でろ過される。ろ過後の水は、滅
菌処理を経た後、一般家庭等に供給される。FIG. 4 is a schematic diagram of a water purification plant. Figure 4
Then, the water intake pump 40 takes in raw water from a river or the like.
The raw water taken in is led to the flock formation pond 41. A flocculant is fed in front of the floc formation pond 41, and the fed flocculant forms particles together with dust and the like in the raw water. These particles are called flocs. In the flock formation pond 41, a water wheel called a flocculator runs. The water that has passed through the floc formation pond 41 is guided to the sedimentation pond. In the settling tank 42, flocs settle. The supernatant of the settling tank 42 is supplied to the filter tank 43. This removes dust and the like mixed in the raw water. In the filter basin 43, the supernatant sorted by the settling basin 42 is filtered by the filter 44. The filtered water is sterilized and then supplied to general households.
【０００４】このようにして、浄水場では、いくつかの
処理を経て原水が水道水へ浄化される。浄水場では、供
給される水の水質を常時管理し、汚染した水が配水され
ることを未然に食い止めなければならない。In this way, the raw water is purified into tap water through several treatments at the water purification plant. At the water purification plant, the quality of the supplied water must be controlled at all times to prevent contaminated water from being distributed.
【０００５】浄水場が取水する原水の中には、クリプト
スポリジウム（以下、クリプトとする）やジアルジアと
いう原虫が存在することがある。これらの原虫が水道水
に混入していると、水道水の利用者に激しい病害をもた
らすことになる。平成８年１０月の厚生省暫定指針で
は、ろ過池出口の濁度を０．１度以下に維持するように
定められている。The raw water taken by the water purification plant may contain protozoa such as Cryptosporidium (hereinafter referred to as “crypt”) and Giardia. If these protozoa are mixed in tap water, it will cause severe diseases to users of tap water. The provisional guideline of the Ministry of Health and Welfare in October 1996 stipulates that the turbidity at the outlet of the filtration basin should be maintained below 0.1 degrees.
【０００６】しかし、原虫の大きさは数μｍと小さいた
め、目視で数えることはできず、ろ過池中の原虫の数を
検出する有効な手段はなかった。However, since the size of the protozoa is as small as several μm, it cannot be visually counted, and there is no effective means for detecting the number of the protozoa in the filtration basin.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、現在は原虫
を直接測定できる手段がないという事情に鑑みてなされ
たものであり、検出粒径の範囲が原虫の寸法をカバーす
る粒子カウンタを浄水場に適用し、この粒子カウンタを
用いてろ過池に存在する原虫の個数を推定することによ
って、水道水への原虫の混入を未然に食い止められる水
質管理システムを実現することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the fact that there is currently no means for directly measuring the protozoa, and a particle counter whose detection particle size range covers the size of the protozoa is purified. The purpose is to realize a water quality management system that can prevent the contamination of tap water with protozoa by using the particle counter to estimate the number of protozoa existing in the filter basin.
【０００８】[0008]
【課題を解決するための手段】本発明は次のとおりの構
成になった水質管理システムである。The present invention is a water quality management system configured as follows.
【０００９】（１）ろ過池の入り口と出口に設けられ、
ろ過池の入り口と出口で水の単位体積当たりに含まれる
粒子の数を粒径別に検出し、検出粒径の範囲には原虫の
寸法が含まれる粒子カウンタと、（ろ過池の入り口にあ
る粒子カウンタとろ過池の出口にある粒子カウンタの検
出値の差）／（ろ過池の入り口にある粒子カウンタの検
出値）よりろ過池の粒子除去率を求め、（サンプル水の
単位体積当たりに含まれる原虫の数の測定値）×（ろ過
池を通過前の水の供給量）×（ろ過池の粒子除去率）よ
りろ過池を通過後の水に含まれる原虫の数を推定し、推
定結果をもとに、原虫の寸法が含まれる粒径範囲の検出
値が所定の基準値よりも多いときは、原虫の数が基準値
を越えている可能性があると判断する判断手段と、この
判断手段が原虫の数が基準値を越えている可能性がある
と判断したときは、ろ過池を洗浄する洗浄手段と、を具
備したことを特徴とする水質管理システム。(1) Provided at the entrance and exit of the filter pond,
The number of particles contained in a unit volume of water at the inlet and outlet of the filter is detected by particle size, and a particle counter that includes the size of the protozoa in the range of the detected particle size (at the inlet of the filter
Particle counter and the particle counter at the outlet of the filter.
(Difference in output value) / (Detection of the particle counter at the entrance of the filter
Calculate the particle removal rate of the filter from the
Measured value of the number of protozoa contained per unit volume) × (filtration
Water supply before passing through the pond) x (particle removal rate of the filtration pond)
The number of protozoa contained in the water after passing through the filtration tank is estimated and estimated.
Based on the determination result, when the detected value in the particle size range including the size of the protozoa is larger than the predetermined reference value, the determination means to determine that the number of the protozoa may exceed the reference value. A water quality management system comprising: a cleaning means for cleaning the filter basin when the determining means determines that the number of protozoa may exceed the standard value.
【００１０】（２）ろ過池の入り口と出口に設けられ、
ろ過池の入り口と出口で水の単位体積当たりに含まれる
粒子の数を粒径別に検出し、検出粒径の範囲には原虫の
寸法が含まれる粒子カウンタと、（ろ過池の入り口にあ
る粒子カウンタとろ過池の出口にある粒子カウンタの検
出値の差）／（ろ過池の入り口にある粒子カウンタの検
出値）よりろ過池の粒子除去率を求め、（サンプル水の
単位体積当たりに含まれる原虫の数の測定値）×（ろ過
池を通過前の水の供給量）×（ろ過池の粒子除去率）よ
りろ過池を通過後の水に含まれる原虫の数を推定し、推
定結果をもとに、原虫の寸法が含まれる粒径範囲の検出
値が所定の基準値よりも多いときは、原虫の数が基準値
を越えている可能性があると判断する判断手段と、この
判断手段が原虫の数が基準値を越えている可能性がある
と判断したときは、ろ過池からの水の流出を停止する流
出制御手段と、を具備したことを特徴とする水質管理シ
ステム。(2) Provided at the entrance and exit of the filter pond,
The number of particles contained in a unit volume of water at the inlet and outlet of the filter is detected by particle size, and a particle counter that includes the size of the protozoa in the range of the detected particle size (at the inlet of the filter
Particle counter and the particle counter at the outlet of the filter.
(Difference in output value) / (Detection of the particle counter at the entrance of the filter
Calculate the particle removal rate of the filter from the
Measured value of the number of protozoa contained per unit volume) × (filtration
Water supply before passing through the pond) x (particle removal rate of the filtration pond)
The number of protozoa contained in the water after passing through the filtration tank is estimated and estimated.
Based on the determination result, when the detected value in the particle size range including the size of the protozoa is larger than the predetermined reference value, the determination means to determine that the number of the protozoa may exceed the reference value. When the judgment means judges that the number of protozoa may exceed the reference value, the water quality control is characterized by comprising an outflow control means for stopping the outflow of water from the filter basin. system.
【００１１】（３）前記判断手段が原虫の数が基準値を
越えている可能性があると判断したときは、警報を発生
する警報手段を具備したことを特徴とする（１）または
（２）記載の水質管理システム。(3) When the judgment means judges that the number of protozoa may exceed the reference value, it is equipped with an alarm means for issuing an alarm (1) or (2). ) Water quality management system described.
【００１７】[0017]
【発明の実施の形態】以下図面を用いて本発明を詳しく
説明する。図１は本発明の一実施例を示す構成図であ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
【００１８】図１で、粒子カウンタ１０と１１は、ろ過
池４３の入口と出口にそれぞれ設けられ、ろ過池４３に
流入する水と流出する水の単位体積当たりに含まれる粒
子の数を粒径別に検出する。粒子カウンタ１０，１１は
粒径の測定範囲として、例えば、２〜５μｍ，５〜１０
μｍ，１０〜１５μｍをとりうる。原虫の寸法は数μｍ
であるため、粒子カウンタ１０の検出粒径の範囲内に含
まれる。In FIG. 1, particle counters 10 and 11 are provided at the inlet and outlet of the filter basin 43, respectively, and the number of particles contained in a unit volume of water flowing into and out of the filter basin 43 is defined as the particle size. Detect separately. The particle counters 10 and 11 have a particle size measuring range of, for example, 2 to 5 μm and 5 to 10 μm.
μm, 10 to 15 μm can be taken. The size of the protozoa is several μm
Therefore, it is included in the range of the particle size detected by the particle counter 10.
【００１９】粒子カウンタ１０，１１は、測定管を挟ん
でレーザ光源と受光素子を対向配置させ、測定管に測定
対象の水を流す構成になっている。測定対象の水に粒子
が混入していれば、レーザ光が粒子に遮られて受光素子
で検出されない。遮られた光の寸法を検出することによ
り、粒径を検出し、遮られた回数をカウントすることに
より粒子数をカウントする。粒子カウンタの測定ポイン
トにおける水の流量（体積流量）を定量に保持し、所定
時間にわたって粒子数をカウントすることによって、粒
子カウンタは水の単位体積当たりに含まれる粒子の数を
検出する。このようにして、レーザ光遮断方式により粒
子を検出する。The particle counters 10 and 11 have a structure in which a laser light source and a light receiving element are arranged to face each other with a measuring tube interposed therebetween, and water to be measured flows through the measuring tube. If particles are mixed in the water to be measured, the laser light is blocked by the particles and is not detected by the light receiving element. The particle size is detected by detecting the size of the blocked light, and the number of particles is counted by counting the number of times the light is blocked. The particle counter detects the number of particles contained in a unit volume of water by keeping the flow rate (volume flow rate) of water at a measurement point of the particle counter at a fixed amount and counting the number of particles over a predetermined time. In this way, particles are detected by the laser light blocking method.
【００２０】判断手段１２は、粒子カウンタ１１の検出
結果をもとに、原虫の寸法が含まれる粒径範囲の検出値
が所定の基準値よりも多いかどうかを判断する。洗浄手
段１３は、判断手段１２が検出値が所定の基準値よりも
多いと判断したときは、ろ過池のろ過機能が低下したと
判断し、ろ過池４３を洗浄する。Based on the detection result of the particle counter 11, the judging means 12 judges whether or not the detected value in the particle size range including the size of the protozoa is larger than a predetermined reference value. When the determination unit 12 determines that the detected value is larger than the predetermined reference value, the cleaning unit 13 determines that the filtration function of the filter basin has deteriorated and cleans the filter basin 43.
【００２１】流出制御手段１４は、判断手段１２が検出
値が所定の基準値よりも多いと判断したときは、ろ過池
の休止工程に移行し、ろ過池４３からの水の流出を停止
する。警報手段１６は、判断手段１２が検出値が所定の
基準値よりも多いと判断したときは、警報を発生する。When the judging means 12 judges that the detected value is larger than the predetermined reference value, the outflow control means 14 shifts to the pausing step of the filtration pond and stops the outflow of water from the filtration pond 43. The alarm means 16 issues an alarm when the determination means 12 determines that the detected value is larger than a predetermined reference value.
【００２２】流入弁１７はろ過池４３への水の流入と遮
断を行うゲートとなっている。ここで、逆洗と各弁の開
閉について説明する。逆洗弁１８はろ過層を洗浄すると
きに開かれる。逆洗水は逆洗弁１８を通ってろ過層に供
給される。排出弁１９はろ過池の洗浄時に出る排水を排
出するために設けられている。捨水弁２０は、ろ過層を
洗浄後、残った水を捨てるときに開く。ろ過弁２１は通
常のろ過を行うときに開けられる。The inflow valve 17 is a gate for shutting off and shutting in the water into the filtration basin 43. Here, backwashing and opening / closing of each valve will be described. The backwash valve 18 is opened when washing the filtration layer. The backwash water is supplied to the filtration layer through the backwash valve 18. The discharge valve 19 is provided to discharge the waste water discharged when cleaning the filter basin. The drain valve 20 is opened when the remaining water is discarded after the filtration layer is washed. The filtration valve 21 is opened when performing normal filtration.
【００２３】図1のシステムの動作を説明する。粒子カ
ウンタ１１の測定範囲を、例えば、２〜５μｍ，５〜１
０μｍ，１０〜１５μｍとする。粒子カウンタ１１は、
これらの範囲に入る粒子の数をそれぞれカウントする。The operation of the system shown in FIG. 1 will be described. The measurement range of the particle counter 11 is, for example, 2 to 5 μm, 5 to 1
The thickness is 0 μm and 10 to 15 μm. The particle counter 11
The number of particles falling within these ranges is counted respectively.
【００２４】図２は粒子カウンタ１１の検出結果の一例
を示した図である。クリプトの大きさは３〜６μｍであ
る。粒径が２〜５μｍの範囲における粒子の検出数が所
定の基準値Ｃｐを超えていないと判断手段１２が判断し
たときは、特別な措置を施さない。FIG. 2 is a diagram showing an example of the detection result of the particle counter 11. The size of the crypt is 3 to 6 μm. When the determination means 12 determines that the number of detected particles in the particle size range of 2 to 5 μm does not exceed the predetermined reference value Cp, no special measure is taken.
【００２５】粒子カウンタ１１は所定のサンプリング周
期毎に検出結果を出力していく。図２の破線に示すよう
に粒径が２〜５μｍの範囲における粒子の検出数が所定
の基準値Ｃｐを超えたときは、判断手段１２は、クリプ
トの数が基準値を超えている可能性があると判断する。
この判断に基づいて、ろ過池の洗浄、ろ過池からの水の
流出の停止、警報の発生等の措置を施す。基準値Ｃｐ
は、初期調整時に正常なろ過水の粒子数を計測し、計測
結果より判断して決定する。このように、ろ過水に含ま
れた粒子の数が許容値以内にあるときは、ろ過池が正常
に働いていると判断でき、ろ過池の一般的性能（粒径が
１μｍ以上の物質をろ過する作用）により、粒径が３〜
６μｍのクリプトは含まれないと推定することができ
る。The particle counter 11 outputs the detection result every predetermined sampling period. As shown by the broken line in FIG. 2, when the number of detected particles in the particle size range of 2 to 5 μm exceeds a predetermined reference value Cp, the determination unit 12 may determine that the number of cryptographs exceeds the reference value. Determine that there is.
Based on this judgment, measures such as cleaning the filter, stopping the outflow of water from the filter and issuing an alarm will be taken. Reference value Cp
Is determined by measuring the number of particles of normal filtered water at the time of initial adjustment and judging from the measurement results. In this way, when the number of particles contained in the filtered water is within the allowable value, it can be determined that the filtration basin is operating normally, and the general performance of the filtration basin (filtering substances with a particle size of 1 μm or more Particle size of 3 to
It can be estimated that 6 μm crypto is not included.
【００２６】また、判断手段１２は、粒子カウンタ１１
の検出結果の経時的変化を監視し、検出値が検出粒径の
範囲全体（図２の例では、２〜５μｍ，５〜１０μｍ，
１０〜１５μｍの範囲の全て）にわたって所定の基準値
よりも多くなったときは、ろ過池４３のろ過能力が劣化
していると判断し、洗浄手段１３にろ過層４３１の洗浄
を行わせる。図２の例では、ろ過池４３は、通常は粒径
が１μｍ以上の粒子を除去するが、２〜５μｍ，５〜１
０μｍ，１０〜１５μｍの範囲の全てにわたって検出値
が所定の基準値よりも多くなったときは、ろ過能力が劣
化していると判断する。Further, the judging means 12 is a particle counter 11
The time-dependent change of the detection result of is detected and the detected value is in the entire range of the detected particle size (in the example of FIG. 2, 2 to 5 μm, 5 to 10 μm,
When it becomes larger than the predetermined reference value over the entire range of 10 to 15 μm), it is judged that the filtration capacity of the filter basin 43 is deteriorated, and the cleaning means 13 is made to clean the filter layer 431. In the example of FIG. 2, the filter basin 43 normally removes particles having a particle size of 1 μm or more, but 2 to 5 μm, 5 to 1
When the detected value exceeds the predetermined reference value over the entire range of 0 μm and 10 to 15 μm, it is determined that the filtration capacity is deteriorated.
【００２７】（粒子カウンタ１０と１１の検出値の差）
／（粒子カウンタ１０の検出値）をとることによって、
ろ過池４３の粒子除去率を検出できる。(Difference between detection values of particle counters 10 and 11)
By taking / (detection value of particle counter 10),
The particle removal rate of the filter 43 can be detected.
【００３１】図３は本発明にかかる水の単位体積当たり
に含まれる原虫の数の推定方法の処理手順を示したフロ
ーチャートである。フローチャートのステップ順に従っ
て説明する。FIG. 3 is a flowchart showing the processing procedure of the method for estimating the number of protozoa contained in a unit volume of water according to the present invention. It will be described according to the order of steps in the flowchart.
【００３２】（Ｓ１）原水のサンプルを採取し、このサ
ンプル水の単位体積当たりに含まれる原虫の数Ａを規定
された測定方法で測定する。サンプル水は例えば河川か
ら採取する。この測定方法は厚生省のガイドラインで定
められている。測定方法を概説すると、サンプル水を濃
縮し、濃縮した水に含まれた粒子を染色し、染色した粒
子を顕微鏡で観察することによって、単位体積当りの原
虫数をカウントする。(S1) A sample of raw water is collected, and the number A of protozoa contained in a unit volume of the sample water is measured by a prescribed measuring method. Sample water is collected from a river, for example. This measurement method is specified in the guidelines of the Ministry of Health. To outline the measurement method, the number of protozoa per unit volume is counted by concentrating sample water, staining particles contained in the concentrated water, and observing the stained particles with a microscope.
【００３３】（Ｓ２）ろ過池の粒子除去率Ｂを求める。
粒子除去率Ｂは、図１、図４の実施例にあるような粒子
カウンタをろ過池の入り口と出口に設け、（ろ過池の入
り口にある粒子カウンタとろ過池の出口にある粒子カウ
ンタの検出値の差）／（ろ過池の入り口にある粒子カウ
ンタの検出値）から求める。(S2) The particle removal rate B of the filter is determined.
For the particle removal rate B, the particle counters as in the embodiments of FIGS. 1 and 4 are provided at the inlet and the outlet of the filtration pond, and (the detection of the particle counter at the inlet of the filtration pond and the particle counter at the outlet of the filtration pond is detected. Value difference) / (detection value of particle counter at the entrance of the filter).
【００３４】（Ｓ３）Ａ×（ろ過池を通過前の水の供給
量）×Ｂから、ろ過池を通過後の水に含まれる原虫の数
Ｃを求める。これによって、ろ過池でろ過後の水をある
人が飲んだときに、飲んだ人の体内に入る原虫の数を推
定できる。(S3) The number C of protozoa contained in the water after passing through the filter is determined from A × (the amount of water supplied before passing through the filter) × B. This makes it possible to estimate the number of protozoa that enter the body of a person who drank the filtered water in the filter pond.
【００３５】[0035]
【発明の効果】本発明によれば次の効果が得られる。According to the present invention, the following effects can be obtained.
【００３６】請求項１の発明によれば、ろ過池に存在す
る原虫の数を適確に推定し、ろ過池を洗浄することがで
きる。According to the first aspect of the present invention, the number of protozoa present in the filter basin can be accurately estimated and the filter basin can be washed.
【００３７】請求項２の発明によれば、ろ過池に存在す
る原虫の数を適確に推定し、原虫で汚染されたろ過池の
水が水道水として供給されることを防ぐことができる。According to the second aspect of the present invention, the number of protozoa present in the filter basin can be accurately estimated, and the water in the filter basin contaminated with the protozoa can be prevented from being supplied as tap water.
【００３８】請求項３の発明によれば、ろ過池に存在す
る原虫の数を適確に推定し、警報を発生することができ
る。According to the third aspect of the present invention, the number of protozoa present in the filter basin can be accurately estimated and an alarm can be issued.
【図１】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】粒子カウンタの検出結果の一例を示した図であ
る。FIG. 2 is a diagram showing an example of a detection result of a particle counter.
【図３】本発明にかかる方法の処理手順を示したフロー
チャートである。FIG. 3 is a flowchart showing a processing procedure of a method according to the present invention.
【図４】浄水場の概略構成図である。FIG. 4 is a schematic configuration diagram of a water purification plant.
１０，１１ 粒子カウンタ １２ 判断手段 １３ 洗浄手段 １４ 流出制御手段 １６ 警報手段 ４３ ろ過池 10, 11 Particle counter 12 Judgment means 13 Cleaning means 14 Outflow control means 16 Alarm means 43 Filter pond
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平10−311784（ＪＰ，Ａ) 特開 昭55−86507（ＪＰ，Ａ) 特開 平９−273987（ＪＰ，Ａ) 特開 平５−168819（ＪＰ，Ａ) 特開 平10−305300（ＪＰ，Ａ) 実開 昭60−5403（ＪＰ，Ｕ) 特表 平３−502547（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G06M 7/00 - 11/04 G01N 15/00 - 15/14 B01D 29/00 - 29/48 B01D 23/00 - 23/28 B01D 53/34 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-10-311784 (JP, A) JP-A-55-86507 (JP, A) JP-A-9-273987 (JP, A) JP-A-5- 168819 (JP, A) Unexamined Japanese Patent Publication No. 10-305300 (JP, A) Actually developed 60-5403 (JP, U) Special Table 3-502547 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) G06M 7/ 00-11/04 G01N 15/00-15/14 B01D 29/00-29/48 B01D 23/00-23/28 B01D 53/34
Claims (3)
池の入り口と出口で水の単位体積当たりに含まれる粒子
の数を粒径別に検出し、検出粒径の範囲には原虫の寸法
が含まれる粒子カウンタと、（ろ過池の入り口にある粒子カウンタとろ過池の出口に
ある粒子カウンタの検出値の差）／（ろ過池の入り口に
ある粒子カウンタの検出値）よりろ過池の粒子除去率を
求め、（サンプル水の単位体積当たりに含まれる原虫の
数の測定値）×（ろ過池を通過前の水の供給量）×（ろ
過池の粒子除去率）よりろ過池を通過後の水に含まれる
原虫の数を推定し、推定結果をもとに、 原虫の寸法が含
まれる粒径範囲の検出値が所定の基準値よりも多いとき
は、原虫の数が基準値を越えている可能性があると判断
する判断手段と、 この判断手段が原虫の数が基準値を越えている可能性が
あると判断したときは、ろ過池を洗浄する洗浄手段と、 を具備したことを特徴とする水質管理システム。1. A filter provided at the entrance and the exit of a filtration pond for filtering.
The number of particles contained in a unit volume of water at the entrance and the exit of the pond is detected by particle size, and the particle counter that includes the size of the protozoa in the range of the detected particle size and the (particle counter at the entrance of the filtration pond And at the exit of the filtration pond
The difference between the detection values of a certain particle counter) / (at the entrance of the filter pond
From the detection value of a certain particle counter)
Obtained (of protozoa contained per unit volume of sample water
Number of measurements) × (amount of water supplied before passing through the filter) × (filter
Included in the water after passing through the filtration basin according to the particle removal rate
Estimate the number of protozoa, and based on the estimation results, if the detected value in the particle size range that includes the dimensions of the protozoa is greater than the predetermined reference value, the number of protozoa may exceed the reference value. The water quality is characterized by having a judging means for judging that there is a certain number, and a cleaning means for cleaning the filter basin when the judging means judges that the number of protozoa may exceed the standard value. Management system.
池の入り口と出口で水の単位体積当たりに含まれる粒子
の数を粒径別に検出し、検出粒径の範囲には原虫の寸法
が含まれる粒子カウンタと、（ろ過池の入り口にある粒子カウンタとろ過池の出口に
ある粒子カウンタの検出値の差）／（ろ過池の入り口に
ある粒子カウンタの検出値）よりろ過池の粒子除去率を
求め、（サンプル水の単位体積当たりに含まれる原虫の
数の測定値）×（ろ過池を通過前の水の供給量）×（ろ
過池の粒子除去率）よりろ過池を通過後の水に含まれる
原虫の数を推定し、推定結果をもとに、 原虫の寸法が含
まれる粒径範囲の検出値が所定の基準値よりも多いとき
は、原虫の数が基準値を越えている可能性があると判断
する判断手段と、 この判断手段が原虫の数が基準値を越えている可能性が
あると判断したときは、ろ過池からの水の流出を停止す
る流出制御手段と、 を具備したことを特徴とする水質管理システム。2. A filter provided at the entrance and the exit of the filtration pond for filtering.
The number of particles contained in a unit volume of water at the entrance and the exit of the pond is detected by particle size, and the particle counter that includes the size of the protozoa in the range of the detected particle size and the (particle counter at the entrance of the filtration pond And at the exit of the filtration pond
The difference between the detection values of a certain particle counter) / (at the entrance of the filter pond
From the detection value of a certain particle counter)
Obtained (of protozoa contained per unit volume of sample water
Number of measurements) × (amount of water supplied before passing through the filter) × (filter
Included in the water after passing through the filtration basin according to the particle removal rate
Estimate the number of protozoa, and based on the estimation results, if the detected value in the particle size range that includes the dimensions of the protozoa is greater than the predetermined reference value, the number of protozoa may exceed the reference value. And a spill control means for stopping the spillage of water from the filter basin when the determinant determines that the number of protozoa may exceed the standard value. A water quality management system characterized by that.
ている可能性があると判断したときは、警報を発生する
警報手段を具備したことを特徴とする請求項１または請
求項２記載の水質管理システム。3. The method according to claim 1, further comprising an alarm means for issuing an alarm when the determining means determines that the number of protozoa may exceed a reference value. Water quality management system described.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34690398A JP3442301B2 (en) | 1998-12-07 | 1998-12-07 | Water quality management system |
| JP2000246786A JP3470332B2 (en) | 1998-12-07 | 2000-08-16 | Water quality management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34690398A JP3442301B2 (en) | 1998-12-07 | 1998-12-07 | Water quality management system |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000246786A Division JP3470332B2 (en) | 1998-12-07 | 2000-08-16 | Water quality management system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000172822A JP2000172822A (en) | 2000-06-23 |
| JP3442301B2 true JP3442301B2 (en) | 2003-09-02 |
Family
ID=18386606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34690398A Expired - Fee Related JP3442301B2 (en) | 1998-12-07 | 1998-12-07 | Water quality management system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3442301B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007111638A (en) * | 2005-10-20 | 2007-05-10 | Sumitomo Heavy Ind Ltd | Membrane water purification system and membrane water purification method |
-
1998
- 1998-12-07 JP JP34690398A patent/JP3442301B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000172822A (en) | 2000-06-23 |
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