JPS6320192B2 - - Google Patents
Info
- Publication number
- JPS6320192B2 JPS6320192B2 JP13980880A JP13980880A JPS6320192B2 JP S6320192 B2 JPS6320192 B2 JP S6320192B2 JP 13980880 A JP13980880 A JP 13980880A JP 13980880 A JP13980880 A JP 13980880A JP S6320192 B2 JPS6320192 B2 JP S6320192B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- raw water
- water
- chlorine
- injected
- 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
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 19
- 239000000460 chlorine Substances 0.000 claims description 19
- 229910052801 chlorine Inorganic materials 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 9
- 239000002663 humin Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000001954 sterilising effect Effects 0.000 claims description 3
- 238000004659 sterilization and disinfection Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Sorption (AREA)
Description
【発明の詳細な説明】
本発明は取水した原水に塩素を注入し殺菌処理
を行う浄水設備の活性炭注入制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an activated carbon injection control method for water purification equipment that performs sterilization treatment by injecting chlorine into taken raw water.
周知のように、浄水場においては取水した原水
の殺菌するために塩素を注入している。塩素は通
常着水井に注入される。着水井に注入する塩素を
前塩素と称している。 As is well known, at water treatment plants, chlorine is injected into the raw water taken to sterilize it. Chlorine is usually injected into the landing well. The chlorine injected into the receiving well is called pre-chlorine.
一方、近年水源の水質汚染が著しく、取水した
原水に多くの有機物が含まれるようになつてきて
いる。原水中の有機物が多くなるに伴い有機物の
一種であるフミン質も多くなつてきている。 On the other hand, in recent years, the water quality of water sources has become significantly contaminated, and the raw water taken from the water has come to contain a large amount of organic matter. As the amount of organic matter in raw water increases, the amount of humic substances, a type of organic matter, also increases.
ところが、フミン質は塩素と反応しトリハロメ
タンという有害物質を生成する。トリハロメタン
は発癌性物質でないかと疑いをかけられている。
このトリハロメタンは特に取水原水の水質汚染が
著しい浄水場において大きな問題になつている。 However, humic substances react with chlorine and produce a harmful substance called trihalomethane. Trihalomethane is suspected to be a carcinogen.
This trihalomethane has become a major problem, especially in water treatment plants where the water quality of the raw water intake is severely contaminated.
ところで、フミン質を除去するには活性炭を注
入することが有効であるといわれている。活性炭
はフミン質を吸着する。なお、従来浄水場におい
て活性炭注入は行われているが、これは主として
水質検査で原水に発臭物質が含まれている場合に
のみ行われている。この活性炭注入は通常塩素の
注入前に成される。 By the way, it is said that injecting activated carbon is effective in removing humic substances. Activated carbon adsorbs humic substances. Although activated carbon has traditionally been injected at water purification plants, this is mainly done only when water quality tests show that raw water contains odor-producing substances. This activated carbon injection is usually done before the chlorine injection.
さて、上述したようにフミン質を除去するには
活性炭を注入すればよいが、次のような問題点を
有する。 Now, as mentioned above, humic substances can be removed by injecting activated carbon, but this has the following problems.
すなわち、活性炭は活性度に応じて塩素も吸着
する。このため、塩素による殺菌処理を充分に成
し得ず、水処理を効果的に行えなくなる。 That is, activated carbon also adsorbs chlorine depending on the degree of activity. For this reason, sterilization treatment using chlorine cannot be achieved sufficiently, and water treatment cannot be performed effectively.
本発明は上記点に対処して成されたもので、そ
の目的とするところは塩素による処理に悪影響を
及ぼすことなくトリハロメタンを除去できる浄水
設備の活性炭注入制御方法を提供することにあ
る。 The present invention has been made in response to the above-mentioned problems, and its purpose is to provide a method for controlling the injection of activated carbon in water purification equipment, which can remove trihalomethane without adversely affecting treatment with chlorine.
本発明の特徴とするところは原水のフミン質量
を検出し、塩素が注入されて所定時間経過後の原
水にフミン質量に応じて活性炭を注入するように
したことにある。 The feature of the present invention is that the mass of humins in raw water is detected, and activated carbon is injected into the raw water according to the mass of humins after a predetermined time has elapsed since chlorine was injected.
以下、本発明を図に示す一実施例において詳細
に説明する。 Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in the drawings.
図において、河川などの取水源（図示せず）か
ら取水した原水は沈砂池１に供給され、粒径の大
きい砂を除去された後に着水井２に導かれる。着
水井２において塩素注入機９から塩素を注入さ
れ、原水の殺菌と鉄、マンガンなどの酸化が行わ
れる。着水井２から流出した水は混和池３に導か
れ、活性炭注入機８から後述するようにして活性
炭（粉末状）を注入される。なお、混和池３では
原水中の濁質のフロツクを形成するために凝集剤
が注入される。混和池３から流出した水は沈殿池
４に入り、フロツクの沈殿除去が行われた後に
過池５で過される。過池５で過された過
水は図示しない配水池に送られる。一方、沈殿池
１に流入した原水をサンプリングポンプ６で化学
的酸素要求量計（COD計）に導き原水COD値を
測定する。原水COD値Coは比較回路１０に導か
れる。比較回路１０は原水COD値Coが規定値
（許容値）Cs以上のときに出力を生じ、時間遅れ
回路１１を介して注入制御回路１２に与える。注
入制御回路１２は比較回路１０の出力信号を与え
られると活性炭注入機８を駆動し所定量の活性炭
を注入する。 In the figure, raw water taken from a water intake source (not shown) such as a river is supplied to a settling basin 1, and after removing large-sized sand, it is led to a landing well 2. At the receiving well 2, chlorine is injected from a chlorine injection machine 9 to sterilize the raw water and oxidize iron, manganese, etc. Water flowing out from the landing well 2 is led to a mixing basin 3, and activated carbon (powdered) is injected from an activated carbon injector 8 as described later. In the mixing pond 3, a flocculant is injected to form a floc of suspended solids in the raw water. The water flowing out from the mixing basin 3 enters the settling basin 4, where the flocs are removed by sedimentation, and then passed through the filter basin 5. The excess water in the reservoir 5 is sent to a distribution reservoir (not shown). On the other hand, the raw water that has flowed into the sedimentation tank 1 is guided to a chemical oxygen demand meter (COD meter) by a sampling pump 6 and the raw water COD value is measured. The raw water COD value Co is led to a comparison circuit 10. The comparator circuit 10 generates an output when the raw water COD value Co is equal to or higher than a specified value (tolerable value) Cs, and provides the output to the injection control circuit 12 via the time delay circuit 11. When the injection control circuit 12 receives the output signal from the comparison circuit 10, it drives the activated carbon injection machine 8 and injects a predetermined amount of activated carbon.
この構成において、沈砂池１に流入した原水を
サンプリングポンプ６によりCOD計７に導かれ
る。COD計７は原水のCOD値Coを検出する。原
水のCOD値Coは原水中の有機物濃度に比例し、
かつフミン質量は有機物濃度に比例する。したが
つて、COD計７で検出したCOD値Coは原水中の
フミン質量に比例する。比較回路１０はCOD計
７で検出したCOD値Coが許容値Cs以上になると
出力を生じる。許容値Csは例えばトリハロメタ
ンが100ppmに設定される。比較回路１０の出力
（注入指令信号）は時間遅れ回路１１を介して注
入制御回路１２に加えられる。時間遅れ回路１０
の遅れ時間は沈砂池１から混和池３への流下遅れ
時間（例えば、0.5〜1hr）に設定される。注入制
御回路１２は注入指令信号を与えられると活性炭
注入機８を駆動し所定量の活性炭を注入する。混
和池４に注入された活性炭は撹拌されてトリハロ
メタンと接触し吸着する。トリハロメタンを吸着
した活性炭は沈殿池４あるいは過池５で除去さ
れる。その結果、生成したトリハロメタンを除去
することができる。 In this configuration, raw water flowing into the settling basin 1 is guided to the COD meter 7 by the sampling pump 6. COD meter 7 detects the COD value Co of raw water. The COD value Co of raw water is proportional to the concentration of organic matter in the raw water.
Moreover, the humin mass is proportional to the organic matter concentration. Therefore, the COD value Co detected by the COD meter 7 is proportional to the humin mass in the raw water. The comparator circuit 10 produces an output when the COD value Co detected by the COD meter 7 exceeds the allowable value Cs. For example, the permissible value Cs is set to 100 ppm for trihalomethane. The output of the comparison circuit 10 (injection command signal) is applied to the injection control circuit 12 via the time delay circuit 11. Time delay circuit 10
The delay time is set to the flow delay time from the sand settling basin 1 to the mixing basin 3 (for example, 0.5 to 1 hr). When the injection control circuit 12 receives an injection command signal, it drives the activated carbon injection machine 8 and injects a predetermined amount of activated carbon. The activated carbon injected into the mixing pond 4 is stirred and comes into contact with trihalomethane and adsorbs it. Activated carbon that has adsorbed trihalomethane is removed in a settling tank 4 or a filter tank 5. As a result, the generated trihalomethane can be removed.
このようにしてトリハロメタンを除去するので
あるが、活性炭を塩素注入後で、しかも塩素と水
が充分に接触する接触反応時間後（着水井２の滞
留時間）に注入しているので、塩素の水処理に影
響を与えることなくトリハロメタンを除去するこ
とができる。 Trihalomethane is removed in this way, but since activated carbon is injected after chlorine is injected, and moreover, after the contact reaction time during which chlorine and water sufficiently come into contact (residence time in landing well 2), the chlorine water is injected. Trihalomethanes can be removed without affecting processing.
また、上述の実施例で活性炭を混和池に注入し
ているので、撹拌によつてトリハロメタンの吸着
を充分に行うことができる。さらに、粉状活性炭
は凝集剤によつてフロツクを形成する際にフロツ
クの核となり沈降性の良いフロツクを形成するの
に好都合である。特に、原水の濁質の粒径が小さ
いときに顕著な効果を奏する。 Furthermore, since activated carbon is injected into the mixing pond in the above-described embodiments, trihalomethane can be adsorbed sufficiently by stirring. Furthermore, powdered activated carbon is advantageous in that it serves as the nucleus of flocs when flocs are formed using a coagulant and forms flocs with good sedimentation properties. This is particularly effective when the particle size of the suspended solids in the raw water is small.
以上説明したように、本発明によれば塩素の水
処理に何ら影響を与えることなくトリハロメタン
を除去することができる。 As explained above, according to the present invention, trihalomethane can be removed without any effect on chlorine water treatment.
なお、上述の実施例では活性炭を所定量だけ注
入するようにしたが、COD値が許容値以上にな
つたら所定時間だけ連続して注入しても良いのは
勿論である。 In the above-described embodiment, activated carbon is injected in a predetermined amount, but it is of course possible to continuously inject activated carbon for a predetermined period of time once the COD value exceeds a permissible value.
図は本発明の一実施例を示す構成図である。
１……沈砂池、２……着水井、３……混和池、
４……沈殿池、５……過池、７……COD計、
８……活性炭注入機、１０……比較回路、１１…
…時間遅れ回路、１２……注入制御回路。
The figure is a configuration diagram showing an embodiment of the present invention. 1...Sand basin, 2...Water landing well, 3...Mixing pond,
4... Sedimentation tank, 5... Over pond, 7... COD meter,
8...Activated carbon injection machine, 10...Comparison circuit, 11...
...Time delay circuit, 12...Injection control circuit.
Claims (1)
浄水設備において、前記原水のフミン質量を検出
し、塩素が注入されて所定時間経過後の原水に前
記フミン質量に応じて活性炭を注入するようにし
たことを特徴とする浄水設備の活性炭注入制御方
法。 ２ 前記原水のフミン質量の検出は原水の化学的
酸素要求量を検出して行うようにしたことを特徴
とする特許請求の範囲第１項記載の浄水設備の活
性炭注入制御方法。[Claims] 1. In water purification equipment that injects chlorine into raw water to perform sterilization treatment, the mass of humins in the raw water is detected, and after a predetermined period of time has elapsed since chlorine has been injected, the raw water is treated according to the mass of humins. A method for controlling activated carbon injection in water purification equipment, characterized in that activated carbon is injected. 2. The activated carbon injection control method for water purification equipment according to claim 1, wherein the humin mass of the raw water is detected by detecting the chemical oxygen demand of the raw water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13980880A JPS5765378A (en) | 1980-10-08 | 1980-10-08 | Controlling method for injecttion of active carbon in water purification plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13980880A JPS5765378A (en) | 1980-10-08 | 1980-10-08 | Controlling method for injecttion of active carbon in water purification plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5765378A JPS5765378A (en) | 1982-04-20 |
| JPS6320192B2 true JPS6320192B2 (en) | 1988-04-26 |
Family
ID=15253912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13980880A Granted JPS5765378A (en) | 1980-10-08 | 1980-10-08 | Controlling method for injecttion of active carbon in water purification plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5765378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651709A (en) * | 1992-07-22 | 1994-02-25 | Okaya Electric Ind Co Ltd | Display board |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59228904A (en) * | 1983-06-10 | 1984-12-22 | Kurita Water Ind Ltd | Adsorption apparatus |
| JPS62180788A (en) * | 1986-02-03 | 1987-08-08 | Hitachi Plant Eng & Constr Co Ltd | Method for cleaning water |
-
1980
- 1980-10-08 JP JP13980880A patent/JPS5765378A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651709A (en) * | 1992-07-22 | 1994-02-25 | Okaya Electric Ind Co Ltd | Display board |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5765378A (en) | 1982-04-20 |
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