JP3139123B2 - Extraction and supply method of granular activated carbon in fixed bed activated carbon treatment tower - Google Patents
Extraction and supply method of granular activated carbon in fixed bed activated carbon treatment towerInfo
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- JP3139123B2 JP3139123B2 JP04095711A JP9571192A JP3139123B2 JP 3139123 B2 JP3139123 B2 JP 3139123B2 JP 04095711 A JP04095711 A JP 04095711A JP 9571192 A JP9571192 A JP 9571192A JP 3139123 B2 JP3139123 B2 JP 3139123B2
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- Prior art keywords
- activated carbon
- water
- treatment tower
- carbon treatment
- fixed bed
- Prior art date
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Description
【０００１】[0001]
【産業上の利用分野】本発明は水道水等の前処理として
の高度浄水処理における固定床活性炭処理塔への粒状活
性炭の供給及び引抜方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying and extracting granular activated carbon to a fixed-bed activated carbon treatment tower in advanced water purification treatment as pretreatment of tap water or the like.
【０００２】[0002]
【従来の技術】近年、都市部での水環境の悪化に伴って
河川とか湖沼の水質汚濁が進んでおり、従来の凝集沈澱
とか濾過処理及び塩素処理との組み合わせだけでは、水
道用原水中の色度，臭気の除去作用に限界点が生じてい
る現状にある。特に我国の水道水として利用される水源
の約７０％は、地表水と呼ばれる湖沼水，ダム水及び河
川水に依存しており、これら湖沼水とかダムには富栄養
化に伴う生物活動が活発化することによるカビ臭とか藻
臭の発生があり、他方の河川水には各種排水に含まれて
いる有機物とかアンモニア性窒素が流入され、河川の自
然浄化作用によってこれらの流入物を完全に浄化するこ
とは期待できない状況にある。2. Description of the Related Art In recent years, water pollution in rivers and lakes has been increasing due to the deterioration of the water environment in urban areas. There is a limit point in the chromaticity and odor removal effects. In particular, about 70% of the water sources used as tap water in Japan depend on surface water, such as lakes, dams and river water, and these lakes and dams have active biological activities associated with eutrophication. There is a generation of mold and algal odors due to the formation of organic matter, and organic matter and ammonia nitrogen contained in various wastewater flows into the river water, and these inflows are completely purified by the natural purification action of the river. We can't expect to do that.
【０００３】このような高度経済成長に伴う水源の水質
悪化に対処するため、前塩素処理が一般的に採用されて
いるが、前塩素処理を採用した浄水過程で発生する有機
塩素化合物であるトリハロメタン（ＴＨＭ）が発ガン性
を有していることが知られている。このような水源のカ
ビ臭とか藻臭の消去、及びトリハロメタン等発ガン物質
対策として、浄水の操作工程中にオゾン処理、又は該オ
ゾン処理と活性炭処理との複合処理を導入する高度浄水
システムが検討されている。[0003] In order to cope with the deterioration of the water quality of the water source due to such high economic growth, pre-chlorination is generally adopted. Trihalomethane which is an organic chlorine compound generated in a water purification process employing pre-chlorination is used. (THM) is known to have carcinogenicity. An advanced water purification system that introduces ozone treatment or a combined treatment of the ozone treatment and activated carbon treatment during the water purification operation process is being studied to eliminate mold and algal odors from such water sources and to take measures against carcinogens such as trihalomethane. Have been.
【０００４】上記単位操作の一つである活性炭処理と
は、ヤシ殻系活性炭とか石炭系活性炭，更には木炭系活
性炭等の吸着能を利用して、原水中の主として有機汚濁
物質を吸着除去する方法であり、活性炭の形態上から粉
末活性炭と粒状活性炭とに区別される。更に活性炭に硝
化菌等を付着させた生物活性炭を用いる方法も試みられ
ている。[0004] Activated carbon treatment, which is one of the above unit operations, refers to the adsorption and removal of mainly organic pollutants in raw water by utilizing the adsorption ability of coconut shell activated carbon, coal activated carbon, and charcoal activated carbon. It is a method, and it is distinguished into powdered activated carbon and granular activated carbon from the form of activated carbon. Further, a method using biological activated carbon obtained by adhering nitrifying bacteria or the like to activated carbon has also been attempted.
【０００５】例えば木炭等の粒状活性炭の製法として
は、粉砕した原材料を、タールを粘結材として一定粒度
に成形し、乾燥，焼成，賦活する方法が知られている。[0005] For example, as a method for producing granular activated carbon such as charcoal, there is known a method in which a crushed raw material is formed into a certain particle size using tar as a binder, followed by drying, firing and activation.
【０００６】通常の活性炭処理塔では、粒状活性炭を充
填した固定床活性炭処理塔の上部から原水を流入して、
該処理塔の下部から被処理水を流出させる方法が一般に
採用されている。In a normal activated carbon treatment tower, raw water flows from the upper part of a fixed bed activated carbon treatment tower filled with granular activated carbon,
A method of discharging the water to be treated from the lower part of the treatment tower is generally adopted.
【０００７】前記オゾン処理とは、塩素よりもはるかに
酸化力の強力なオゾンＯ3を利用した方法であり、原水
の異臭味とか色度除去、有機物質の生物分解性の増大と
塩素要求量の減少等の作用が得られることが特徴となっ
ている。The above-mentioned ozone treatment is a method using ozone O 3, which has much more oxidizing power than chlorine, and removes off-flavor and chromaticity of raw water, increases biodegradability of organic substances, and requires chlorine. It is characterized in that an effect such as a reduction in the number is obtained.
【０００８】[0008]
【発明が解決しようとする課題】このような高度浄水処
理工程における活性炭処理を実施した際に、活性炭に対
する有機汚濁物質等被吸着物質の吸着が進行するのに伴
って、活性炭の吸着能が次第に低下して被処理水の水質
も徐々に悪化してしまうため、一定期間毎に活性炭処理
塔内の活性炭を新炭に交換するか、又は補充することが
必要となる。When the activated carbon treatment is performed in such an advanced water purification treatment step, as the adsorption of the substance to be adsorbed such as an organic pollutant to the activated carbon proceeds, the adsorbing capacity of the activated carbon gradually increases. Since the water quality decreases and the quality of the water to be treated gradually deteriorates, it is necessary to replace or replenish the activated carbon in the activated carbon treatment tower with new carbon at regular intervals.
【０００９】通常は活性炭処理塔内のどの部分の活性炭
が劣化したかを感知することが出来ないため、劣化した
活性炭のみを選んで引抜くという作業は行われていな
い。従って活性炭が劣化した場合には、やむを得ず処理
塔内に充填されている活性炭全部を交換する方法を採っ
ているのが実情である。Normally, it is not possible to detect which part of the activated carbon in the activated carbon treatment tower has deteriorated, and therefore, there is no work of selecting and extracting only the deteriorated activated carbon. Therefore, when the activated carbon has deteriorated, the fact is that a method of replacing all the activated carbon filled in the treatment tower is inevitable.
【００１０】しかしながら活性炭処理塔に新炭を補充し
た場合には、定常状態に達するまでに長い時間がかかっ
てしまうのが通例であり、例えば生物活性炭を例にとる
と、処理塔から生物活性炭を引き抜いて新炭を補充して
から生物活性炭として機能するまでに２〜３ケ月もかか
ってしまうので、運転上の支障が生じてしまうという課
題が生じる。更に運転開始時にアンモニア性窒素の除去
が期待できないという難点がある外、それまで生物活性
炭処理層で除去されていた生物分解性有機物が活性炭処
理層に回ってくるため、該活性炭処理層の処理負荷が増
大してしまい、引いては被処理水の水質低下が招来され
るという問題点を有している。However, when the activated carbon treatment tower is replenished with new charcoal, it usually takes a long time to reach a steady state. For example, when biological activated carbon is taken as an example, biological activated carbon is removed from the treatment tower. It takes two to three months from the time of withdrawing and replenishing new charcoal to function as biological activated carbon, so that there is a problem that a trouble in operation occurs. In addition to the disadvantage that removal of ammonia nitrogen cannot be expected at the start of operation, the biodegradable organic substances that had been removed by the biological activated carbon treatment layer are now transferred to the activated carbon treatment layer. And the quality of the water to be treated is deteriorated.
【００１１】そこで本発明は上記に鑑みてなされたもの
であり、活性炭処理塔から劣化した活性炭のみを引き抜
いて新炭と交換することを可能として、運転上の支障を
なくすとともに処理塔の機能低下を防止することができ
る活性炭の引抜及び供給方法を提供することを目的とす
る。In view of the above, the present invention has been made in view of the above, and it is possible to remove only the deteriorated activated carbon from the activated carbon treatment tower and replace it with new charcoal, thereby eliminating operational problems and reducing the function of the treatment tower. It is an object of the present invention to provide a method for extracting and supplying activated carbon, which can prevent the occurrence of an activated carbon.
【００１２】[0012]
【課題を解決するための手段】本発明は上記の目的を達
成するために、先ず請求項１により、粒状活性炭が充填
された処理塔に原水を流入して、活性炭の持つ吸着能を
利用して原水中の汚濁物質を吸着除去するようにした高
度浄水処理における固定床活性炭処理塔において、上記
固定床活性炭処理塔の深さ方向に複数段のサンプル採水
口を設け、各サンプル採水口から採取した水を別々に吸
光光度計に導いて吸光光度を測定し、この測定結果から
活性炭の劣化が確認された際に、引抜用ポンプにより該
活性炭処理塔から劣化した活性炭を所定量引抜いて、供
給用ポンプにより引き抜いた分だけの新炭を供給するよ
うにした粒状活性炭の引抜及び供給方法をその実現手段
としている。In order to achieve the above object, according to the present invention, raw water is first introduced into a treatment tower filled with granular activated carbon and the activated carbon is utilized by utilizing the adsorption capacity of the activated carbon. In a fixed bed activated carbon treatment tower in advanced water purification treatment in which pollutants in raw water are adsorbed and removed, a plurality of stages of sample water intakes are provided in the depth direction of the fixed bed activated carbon treatment tower, and sampling is performed from each sample water intake. The separated water is separately led to an absorptiometer to measure the absorbance, and when the measurement result indicates that the activated carbon has deteriorated, a predetermined amount of the deteriorated activated carbon is withdrawn from the activated carbon treatment tower by a drawing pump and supplied. A method for extracting and supplying granular activated carbon in which only the new coal extracted by the pump for supply is supplied is used as a means for realizing the method.
【００１３】更に請求項２により、上記構成に加えて、
活性炭処理塔に流入する被処理水と、活性炭処理塔から
流出する処理水を別々に吸光光度計に導いて吸光光度を
測定し、この測定結果から固定床活性炭処理塔の全体的
な吸着能をモニタリングして、該処理塔の吸着能が低下
した際に前記各サンプル採水口における測定結果に基づ
いて、劣化が確認された活性炭を引抜用ポンプにより所
定量引抜き、供給用ポンプにより引き抜いた分だけの新
炭を供給する方法を提供する。Further, according to claim 2, in addition to the above configuration,
The treated water flowing into the activated carbon treatment tower and the treated water flowing out of the activated carbon treatment tower are separately led to an absorptiometer to measure the absorbance, and from this measurement result, the overall adsorption capacity of the fixed bed activated carbon treatment tower is determined. Monitoring, when the adsorption capacity of the treatment tower is reduced, based on the measurement results at each of the sample water sampling ports, a predetermined amount of activated carbon that has been confirmed to have deteriorated is extracted by the extraction pump, and only the amount extracted by the supply pump is used. To supply new coal.
【００１４】又、活性炭処理塔に対する通水時間と活性
炭の劣化との相関に基づいて、活性炭処理塔への通水開
始直後は上段のサンプル採水口からの採水を重点的に行
い、通水開始後数ヶ月は中段のサンプル採取口からの採
水を、更に長期間経過後は下段のサンプル採水口からの
採水を重点的に行うようにしたモニタリング方法を提供
する。[0014] In addition, based on the correlation between the water passage time and the activated carbon of deterioration with respect to activated carbon treatment tower, immediately after passing the start of water to activated carbon treatment tower performs mainly the water sampling from the upper stage of the sample adopted Mizuguchi, water flow A monitoring method is provided that focuses on water sampling from the middle sampling port for a few months after the start, and water sampling from the lower sampling port after a longer period of time.
【００１５】[0015]
【作用】かかる固定床活性炭処理等における粒状活性炭
の引抜及び供給方法によれば、活性炭処理塔の運転時
に、該活性炭処理塔の流下状態に影響を与えないように
して複数段のサンプル採水口を順次切り換えながら各採
水口から吸光光度計にサンプルを導き、吸光光度を測定
することにより、活性炭処理塔の深さ方向の活性炭の状
態が確認される。According to the method for extracting and supplying granular activated carbon in the fixed-bed activated carbon treatment and the like, during operation of the activated carbon treatment tower, a plurality of stages of sample water sampling ports are provided so as not to affect the flow-down state of the activated carbon treatment tower. The sample is guided from each water sampling port to the absorptiometer while being sequentially switched, and the absorbance is measured to confirm the state of the activated carbon in the depth direction of the activated carbon treatment tower.
【００１６】この測定結果から活性炭の劣化が確認され
た際には、一旦活性炭処理を停止して、予め貯留してお
いた活性炭処理水を処理塔内に流入して活性炭を適宜に
膨張させ、劣化した活性炭層を引抜用ポンプを用いて所
定量引抜き、次に活性炭供給用ポンプを用いて、引抜い
た分だけの新炭を処理塔内に供給する。[0016] When deterioration of the activated carbon is confirmed from the measurement results, the activated carbon treatment is temporarily stopped, and activated carbon treated water stored in advance is introduced into the treatment tower to appropriately expand the activated carbon. A predetermined amount of the degraded activated carbon layer is withdrawn using a drawing pump, and then the amount of fresh carbon that has been drawn is supplied into the treatment tower using the activated carbon supply pump.
【００１７】又、活性炭被処理水貯留槽と活性炭処理水
貯留槽から別々に吸光光度計に水を導入して吸光光度を
測定することにより、処理水に対する活性炭処理塔自体
の吸着能がモニタリングされ、この吸着能が低下した場
合には、処理塔内に充填された活性炭の少なくとも一部
が劣化したものと判断して、前記した操作態様に基づい
て深さ方向の活性炭の状態を確認し、劣化した活性炭の
みを引抜くとともにこの引抜量に相当する新炭を供給す
る。Also, by separately introducing water from the activated carbon treated water storage tank and the activated carbon treated water storage tank into the absorptiometer and measuring the absorbance, the adsorption ability of the activated carbon treatment tower itself to the treated water is monitored. When the adsorption capacity is reduced, it is determined that at least a part of the activated carbon filled in the treatment tower has deteriorated, and the state of the activated carbon in the depth direction is confirmed based on the operation mode described above, Only the deteriorated activated carbon is withdrawn, and new coal corresponding to the amount of the withdrawn is supplied.
【００１８】更に活性炭処理塔に対する通水時間と活性
炭の劣化との相関に関する知見に基づいて、活性炭処理
塔への通水開始直後は上段のサンプル採水口からの採水
を、通水開始後数ケ月は中段のサンプル採水口からの採
水を、更に長期間経過後は下段のサンプル採水口からの
採水を重点的に行うモニタリング方法も可能となり、操
作の簡易化をはかることが可能となる。Further, based on the knowledge about the correlation between the water flow time to the activated carbon treatment tower and the deterioration of the activated carbon, water is immediately taken from the upper sample water inlet immediately after the water flow to the activated carbon treatment tower is started. A monitoring method that focuses on water sampling from the sample water sampling port in the middle stage during the month and after a long period of time will be able to focus on water sampling from the sample water sampling port in the lower stage will also be possible, which will enable simplification of operation. .
【００１９】[0019]
【実施例】以下本発明にかかる固定床活性炭処理塔にお
ける粒状活性炭の供給引抜方法の一実施例を詳述する。
本実施例では先ず固定床活性炭処理塔における活性炭の
機能に関する知見を得るために、（１）活性炭の吸着特
性実験（２）生物活性炭処理実験とを行った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for supplying and extracting granular activated carbon in a fixed bed activated carbon treatment tower according to the present invention will be described below in detail.
In this example, first, in order to obtain knowledge on the function of activated carbon in a fixed-bed activated carbon treatment tower, (1) an adsorption characteristic experiment of activated carbon and (2) a biological activated carbon treatment experiment were performed.
【００２０】（１）活性炭の吸着特性実験 活性炭の吸着特性を調べるため、フミン酸及び腐葉土抽
出水中の有機汚濁物質を被吸着物質とし、石炭系活性炭
Ａとヤシ殻系活性炭Ｂとの２種類の等温吸着線を求め、
それぞれの吸着特性を比較した。(1) Experiment on Adsorption Characteristics of Activated Carbon In order to investigate the adsorption characteristics of activated carbon, humic acid and organic pollutants in mulch extract water were used as the substances to be adsorbed, and two types of activated carbon, coal-based activated carbon A and coconut-based activated carbon B, were used. Find the isotherm adsorption line,
The respective adsorption characteristics were compared.
【００２１】フミン酸溶液は、粉末フミン酸１ｇを１Ｎ
・ＮａＯＨ１００ｍｌで溶解後、０．４５μｍメンブラ
ンフィルタを用いてｓｓ成分を取り除いたものを原液と
し、試験時に０．１Ｎ・Ｈ2ＳＯ4でｐＨ７．０±０．２
に調整し、精製水で希釈濃度に調製した。腐葉土抽出水
は、２リットルの腐葉土を脱塩素水で１時間煮沸し、放
冷後、ふるいで濾して２０リットルに調製した。この液
を凝集沈澱処理し、０．４５μｍのメンブランフィルタ
で濾過した濾液を腐葉土抽出原液とした。尚、腐葉土抽
出原液の水質は、腐葉土抽出水を５０倍程度に濃縮調整
したものに相当する。又、活性炭の粉砕方法はＪＩＳ
１４７４−１９７５に準じて実施した。The humic acid solution was prepared by adding 1 g of powdered humic acid to 1N.
A solution obtained by dissolving with 100 ml of NaOH and removing the ss component using a 0.45 μm membrane filter was used as a stock solution, and the pH was adjusted to 7.0 ± 0.2 with 0.1 N · H 2 SO 4 during the test.
And adjusted to a dilution concentration with purified water. Hull extract water was prepared by boiling 2 liters of humus with dechlorinated water for 1 hour, allowing it to cool, and sieving through a sieve to make 20 liters. This solution was subjected to coagulation sedimentation treatment, and the filtrate filtered with a 0.45 μm membrane filter was used as a humus extract stock solution. The water quality of the humus extract stock solution corresponds to the humus extract water that has been concentrated and adjusted about 50-fold. Activated carbon is crushed according to JIS
1474-1975.
【００２２】吸着試験は、粉砕した活性炭を各々０．１
〜５．０ｇ、０．０２〜１．０ｇの各５種類の範囲で秤
量し、これをフミン酸溶液及び腐葉土抽出水１００ｍｌ
を入れた２００ｍｌバイアル瓶に添加して窒素ガスで空
気をパージした後、恒温振とう器により２０℃で２４時
間吸着平衡に達するまで振とうした。振とう終了後、
０．４５メンブランフィルタで活性炭を除去し、濾液の
色度，ＣＯＤCr（化学的酸素要求量），ＤＯＣ（溶解性
有機炭素），Ｅ２６０（測定波長２６０ｎｍにおける試
料水の吸光度），ＣＯＤCrとＥ２６０から換算したＴＨ
ＭＦＰ（トリハロメタン生成能）の５指標で等温吸着線
を求めて、活性炭及び原液の違いによる吸着特性を検討
した。その結果を図５に示す。In the adsorption test, each of the pulverized activated carbons was
５5.0 g, 0.02 to 1.0 g each in the range of 5 types, humic acid solution and humus extraction water 100 ml
Was added to a 200-ml vial containing, and the air was purged with nitrogen gas, followed by shaking with a constant-temperature shaker at 20 ° C for 24 hours until the equilibrium was reached. After shaking,
The activated carbon was removed with a 0.45 membrane filter, and the chromaticity of the filtrate, COD Cr (chemical oxygen demand), DOC (soluble organic carbon), E260 (absorbance of sample water at a measurement wavelength of 260 nm), COD Cr and E260 TH converted from
Isothermal adsorption curves were determined using five indices of MFP (trihalomethane generation ability), and the adsorption characteristics depending on the difference between activated carbon and the stock solution were examined. The result is shown in FIG.
【００２３】図５は、縦軸を単位活性炭当たりの吸着量
Ｑ（ｍｇ／ｇ−ＡＣ）とし、横軸をＣｅ／Ｃｉ（Ｃｉ：
初期又は流入濃度，Ｃｅ：平衡又は流出濃度）として、
フロインリッヒ式を変形したＱ＝ｋ’（Ｃｅ／Ｃｉ）
1/nを求めた。ここでｋ’は活性炭の吸着能を示し、傾
き１／ｎは吸着しやすさを示しており、従ってこの傾き
１／ｎが小さいほど低濃度から高濃度領域まで良好に吸
着されることになる。尚、上記Ｅ２６０は、水中の有機
物成分の測定指標として通常利用されている。In FIG. 5, the vertical axis represents the amount of adsorption Q per unit activated carbon (mg / g-AC), and the horizontal axis represents Ce / Ci (Ci:
Initial or inflow concentration, Ce: equilibrium or outflow concentration)
Q = k '(Ce / Ci) modified from the Freundlich equation
1 / n was determined. Here, k ′ indicates the adsorption capacity of activated carbon, and the slope 1 / n indicates the ease of adsorption. Therefore, the smaller the slope 1 / n, the better the adsorption from low to high concentration regions. . The E260 is usually used as a measurement index of organic components in water.
【００２４】図５に示されているように、吸着能は石炭
系活性炭Ａの方がヤシ殻系活性炭Ｂよりも高く、色度と
ＴＨＭＦＰ推算値を除く２指標は、傾き１／ｎが０．９
〜１．４程度を示すが、色度，Ｅ２６０とＴＨＭＦＰ換
算値の傾きは１／ｎは０．６〜０．７と低濃度から高濃
度まで幅広い濃度範囲で吸着されやすいことが判明し
た。ＤＯＣ，ＣＯＤCrの２指標は、高濃度領域で吸着さ
れやすい特性を示すが、低濃度領域では吸着されにくい
傾向を示した。特に色度が最も吸着されやすく、吸着容
量も多いが、活性炭除去対象物であるＴＨＭＦＰは逆に
最も低い値となった。As shown in FIG. 5, the coal-based activated carbon A has a higher adsorption capacity than the coconut shell-based activated carbon B, and the two indices except for the chromaticity and the estimated value of THMFP indicate that the slope 1 / n is 0. .9
Although the chromaticity, the slope of E260 and the value converted into THMFP are 1 / n of 0.6 to 0.7, it was found that adsorption was easy in a wide concentration range from low to high. The two indexes of DOC and COD Cr show characteristics that are easily adsorbed in a high concentration region, but tend to be hardly adsorbed in a low concentration region. In particular, the chromaticity is most easily adsorbed and the adsorption capacity is large, but THMFP, which is the object to be removed with activated carbon, has the lowest value.
【００２５】（２）生物活性炭処理実験 図２に示す高度浄水処理実験装置と、表１に示す仕様及
び処理条件に基づいて生物活性炭処理実験を行った。(2) Biological activated carbon treatment experiment A biological activated carbon treatment experiment was conducted based on the advanced water purification treatment experimental apparatus shown in FIG. 2 and the specifications and treatment conditions shown in Table 1.
【００２６】[0026]
【表１】 [Table 1]
【００２７】図２中の１は原水、２はオゾン接触槽であ
り、該オゾン接触槽２の内方底部に配置された散気管２
ａから図外のオゾン発生機で得られたオゾンガスＯ3が
放散される。３はヤシ殻系活性炭が充填された固定床活
性炭処理塔、４と５は石炭系活性炭が充填された固定床
活性炭処理塔である。従って本実験では原水１の処理と
して、オゾン処理＋ヤシ殻系活性炭処理、オゾン処
理＋石炭系活性炭処理、石炭系活性炭単独処理の３系
列の実験を実施した。本実験で使用した原水１は、浄水
場における凝集沈澱処理水を想定して、前記腐葉度から
抽出した人工沈澱水を用いた。In FIG. 2, reference numeral 1 denotes raw water, 2 denotes an ozone contact tank, and an air diffuser 2 disposed at an inner bottom of the ozone contact tank 2.
Ozone gas O 3 obtained by an ozone generator (not shown) is released from a. 3 is a fixed bed activated carbon treatment tower filled with coconut shell activated carbon, and 4 and 5 are fixed bed activated carbon treatment towers filled with coal activated carbon. Therefore, in this experiment, three series of experiments of the treatment of the raw water 1 were carried out: ozone treatment + coconut shell activated carbon treatment, ozone treatment + coal activated carbon treatment, and coal activated carbon alone treatment. As the raw water 1 used in this experiment, assuming coagulated sedimentation treated water in a water purification plant, artificial sedimentation water extracted from the above-mentioned leaf decay degree was used.
【００２８】腐葉土抽出水は、２リットルの腐葉土を脱
塩素水で１時間煮沸し、放冷後、ふるいで濾して２０リ
ットルに調製した液を注入率５０ｍｇ／ｌの凝集剤で凝
集沈澱処理し、０．４５μｍのメンブランフィルタで濾
過した濾液を腐葉土抽出原液とした。又、活性炭の粉砕
方法はＪＩＳ １４７４−１９７５に準じて行い、吸着
試験は、粉砕した活性炭を０．０２〜１．０ｇの範囲で
秤量し、これを腐葉土抽出水１００ｍｌを入れた２００
ｍｌバイアル瓶に添加して窒素ガスで空気をパージした
後、恒温振とう器により２０℃で２４時間吸着平衡に達
するまで振とうした。振とう終了後、０．４５メンブラ
ンフィルタで活性炭を除去し、濾液の色度，ＣＯＤCr，
ＤＯＣ，Ｅ２６０，ＣＯＤCrとＥ２６０から換算したＴ
ＨＭＦＰの５指標で等温吸着線を求めて、各活性炭の違
いによる吸着特性を検討した。The humus extract water is prepared by boiling 2 liters of humus with dechlorinated water for 1 hour, allowing it to cool, then filtering it through a sieve and preparing a solution prepared to 20 liters with a coagulant having an injection rate of 50 mg / l. The filtrate filtered through a 0.45 μm membrane filter was used as a humus extract stock solution. The method of pulverizing the activated carbon was performed in accordance with JIS 1474-1975, and the adsorption test was performed by weighing the pulverized activated carbon in a range of 0.02 to 1.0 g and adding 100 ml of humus extracted water to the mixture.
After adding to the vial and purging air with nitrogen gas, the mixture was shaken with a constant temperature shaker at 20 ° C. for 24 hours until the adsorption equilibrium was reached. After completion of the shaking, the activated carbon was removed with a 0.45 membrane filter, and the chromaticity, COD Cr ,
T converted from DOC, E260, COD Cr and E260
Isothermal adsorption lines were obtained using the five indexes of HMFP, and the adsorption characteristics depending on the difference of each activated carbon were examined.
【００２９】各活性炭処理塔内の原水流下方向における
アンモニア性窒素（ＮＨ4−Ｎ），Ｅ２６０，ＤＯＣの
吸着分布を、オゾン処理を行わない石炭系活性炭処理塔
５による単独処理によって測定した。本実験の測定方法
は、ＮＨ4−Ｎがイオンクロマトグラフで、その他の水
質分析は８５年度版上水試験法に準じた。The adsorption distribution of ammonia nitrogen (NH 4 —N), E260, and DOC in the downflow direction of the raw water in each activated carbon treatment tower was measured by a single treatment using the coal-based activated carbon treatment tower 5 without performing ozone treatment. The measurement method used in this experiment was NH 4 -N by ion chromatography, and other water quality analysis was in accordance with the 1985 version of the tap water test method.
【００３０】図４は通水開始から４４０日目と７００日
目の測定結果を示しており、縦軸は活性炭処理層の深さ
方向における採水点の滞留時間と活性炭処理層全体の滞
留時間との比（ｔ／θ）をとり、横軸は各指標の流入濃
度に対する流出濃度の比Ｃｅ／Ｃｉ（Ｃｉ：流入濃度，
Ｃｅ：流出濃度）とした。FIG. 4 shows the measurement results on days 440 and 700 from the start of water flow. The vertical axis represents the residence time at the water sampling point in the depth direction of the activated carbon treatment layer and the residence time of the entire activated carbon treatment layer. And the horizontal axis represents the ratio of the outflow concentration to the inflow concentration of each index, Ce / Ci (Ci: inflow concentration,
Ce: outflow concentration).
【００３１】活性炭の上端から流下方向のｔ／θが０．
２までの４４０日目と７００日目のＮＨ4−ＮのＣｅ／
Ｃｉ比は、それぞれ０．１，０．２５で流下方向のｔ／
θが０．２〜１．０までの範囲のＣｅ／Ｃｉはほとんど
平衡状態であった。The value of t / θ in the flow direction from the upper end of the activated carbon is 0.
440 day up to 2 and 700 day NH 4 -N of Ce /
Ci ratios are 0.1 and 0.25, respectively, and t /
Ce / Ci in the range of θ from 0.2 to 1.0 was almost in an equilibrium state.
【００３２】又、アンモニア性窒素（ＮＨ4−Ｎ）は活
性炭表層部で７５％以上除去されており、従ってこのア
ンモニア性窒素を除去する硝化菌が活性炭表層部に多く
存在しているものと推測される。Further, ammonia nitrogen (NH 4 -N) is removed by 75% or more in the surface portion of the activated carbon. Therefore, it is presumed that nitrifying bacteria which remove this ammonia nitrogen are present in a large amount in the surface portion of the activated carbon. Is done.
【００３３】Ｅ２６０の４４０日目，７００日目の変化
を比較すると、ｔ／θが０．２で、Ｃｅ／Ｃｉ比が０．
６前後あったが、４４０日目では深層になるほど除去さ
れている。一方、７００日目ではｔ／θ＝０．６を境に
４４０日目とは逆に再溶出する傾向を示した。これに比
べてＤＯＣは上端部から流下方向のｔ／θが０から１．
０までのＣｅ／Ｃｉ比は０．５５とＮＨ4−Ｎ，Ｅ２６
０よりも低く、更に０次元的に除去されていることが判
明した。Comparing the changes of E260 on days 440 and 700, t / θ is 0.2 and the Ce / Ci ratio is 0.2.
There were around 6, but on day 440, it was removed deeper. On the other hand, on the 700th day, there was a tendency to elute again at the boundary of t / θ = 0.6, contrary to the 440th day. On the other hand, the DOC has a t / θ of 0 to 1.
The Ce / Ci ratio up to 0 is 0.55 and NH 4 -N, E26
It was found that it was lower than 0 and further removed in a 0-dimensional manner.
【００３４】従ってＥ２６０は、傾き１／ｎが０．７１
９と広い濃度範囲で吸着されやすいにも拘わらず、表層
部でかなり除去されていることから、アンモニア性窒素
と同様に生物相による除去効果が大きいものと推測され
る。更に比較的生物相の少ない深層部では７００日程度
で活性炭の吸着能が低下しており、破過に近いことがわ
かる。Therefore, E260 is such that the slope 1 / n is 0.71
Despite being easily adsorbed in a wide concentration range of 9, it is considerably removed in the surface layer portion, so it is presumed that the removal effect by the biota is as large as that of ammoniacal nitrogen. Further, in the deep part where the biota is relatively small, the adsorbing ability of the activated carbon is reduced in about 700 days, which indicates that it is close to breakthrough.
【００３５】図３は固定床活性炭処理塔１０における生
物活性炭処理層１１と活性炭処理層１２の吸着除去特性
をモデル化した概要図であり、この活性炭処理塔１０で
吸着除去される有機物量Ｘは以下のように示される。FIG. 3 is a schematic diagram showing a model of the adsorption and removal characteristics of the biological activated carbon treatment layer 11 and the activated carbon treatment layer 12 in the fixed bed activated carbon treatment tower 10. It is shown as follows.
【００３６】Ｘ＝Ａ＋Ｂ ここでＡ：活性炭による吸着量 Ｂ：生物による吸着量 上記のモデル図から理解されるように、生物活性炭処理
層１１では、主として図中の除去量Ｂで示したように、
生物による有機物及びアンモニア性窒素の除去が行われ
ており、その他の生物難分解性有機物等は、活性炭吸着
量Ａで示したように主として活性炭で吸着されている。
逆に活性炭処理層１２では、Ｂで示す生物による有機物
とアンモニア性窒素の除去量は少なく、Ａで示した活性
炭による吸着量が大きくなっている。そのため、活性炭
処理層１２では、生物活性炭処理層１１に比べて、活性
炭吸着量Ａが活性炭飽和吸着量Ｗに達するまでの時間が
早くなる。従ってこのような固定床活性炭処理塔１０で
は、早く活性炭飽和吸着量Ｗに達した活性炭処理層１２
内の活性炭，換言すれば吸着能が低下した活性炭だけを
引抜いて、新炭と交換すれば良いことが理解される。X = A + B where A: adsorbed amount by activated carbon B: adsorbed amount by organism As understood from the above model diagram, the biological activated carbon treated layer 11 mainly has the removal amount B as shown in the figure. ,
Organic matter and ammonia nitrogen are removed by living organisms, and other biodegradable organic matter and the like are mainly adsorbed by activated carbon as indicated by the activated carbon adsorption amount A.
Conversely, in the activated carbon treatment layer 12, the amount of removal of organic matter and ammonia nitrogen by the organism shown by B is small, and the amount of adsorption by activated carbon shown by A is large. Therefore, in the activated carbon treatment layer 12, the time required for the activated carbon adsorption amount A to reach the activated carbon saturated adsorption amount W is shorter than in the biological activated carbon treatment layer 11. Therefore, in such a fixed-bed activated carbon treatment tower 10, the activated carbon treatment layer 12 having reached the activated carbon saturated adsorption amount W quickly.
It can be understood that only the activated carbon, in other words, the activated carbon having reduced adsorption capacity, should be extracted and replaced with new carbon.
【００３７】そこで本実施例では、上記の知見に基づい
て、図１に示したように固定床活性炭処理塔１０の深さ
方向に複数段のサンプル採水口１３，１４，１５，１６
を設けて、各サンプル採水口１３，１４，１５，１６か
らフィルタＦ1，Ｆ2，Ｆ3，Ｆ4とバルブＶ1，Ｖ2，
Ｖ3，Ｖ4とポンプＰ1及び切換バルブＶ5を介して、各サ
ンプルを別々に吸光光度計１７に導くようにしてある。Therefore, in the present embodiment, based on the above findings, as shown in FIG. 1, a plurality of sample water sampling holes 13, 14, 15, 16 in the depth direction of the fixed bed activated carbon treatment tower 10 are provided.
, And filters F 1 , F 2 , F 3 , F 4 and valves V 1 , V 2 ,
Each sample is separately led to the absorptiometer 17 via V 3 and V 4 , the pump P 1 and the switching valve V 5 .
【００３８】１８は活性炭被処理水貯留槽，１９は活性
炭処理水貯留槽であり、この活性炭被処理水貯留槽１８
からフィルタＦ5，バルブＶ6，ポンプＰ2及び前記切換
バルブＶ5を介して吸光光度計１７に被処理水を導くと
ともに、活性炭処理水貯留槽１９からフィルタＦ6，バ
ルブＶ7，ポンプＰ3及び前記切換バルブＶ5を介して吸
光光度計１７に処理水を導くように構成してある。Reference numeral 18 denotes an activated carbon treated water storage tank, and reference numeral 19 denotes an activated carbon treated water storage tank.
From the activated carbon-treated water storage tank 19, the filter F 6 , the valve V 7 , the pump P 2, and the filter F 5 , the valve V 6 , the pump P 2, and the switching valve V 5. 3 and are configured to direct the treated water absorption photometer 17 via the switching valve V 5.
【００３９】上記の実施例では、固定床活性炭処理塔１
０にサンプル採水口を４個設けた例を示したが、採水口
の個数は上記に限定されるものではなく、必要に応じて
適宜な個数を選択することができる。In the above embodiment, the fixed bed activated carbon treatment tower 1
Although an example in which four sample water inlets are provided at 0 is shown, the number of water inlets is not limited to the above, and an appropriate number can be selected as needed.
【００４０】かかる構成に基づく活性炭の引抜きと供給
の実際例を以下に説明する。先ず基本的な操作として、
活性炭処理塔１０の流下状態に影響を与えないように、
バルブＶ１，Ｖ２，Ｖ３，Ｖ４の中から一つのバルブの
みを開いてポンプＰ1を起動し、切換バルブＶ5を介して
吸光光度計１７にサンプルを導き、吸光光度（Ｅ２６
０）を測定する。そしてバルブＶ１，Ｖ２，Ｖ３，Ｖ４
を順次切り換えながら測定を継続することにより、活性
炭処理塔１０の深さ方向の活性炭の状態を確認する。A practical example of the drawing and supply of activated carbon based on such a configuration will be described below. First, as a basic operation,
In order not to affect the flow state of the activated carbon treatment tower 10,
Start pump P 1 is opened only one valve from the valve V1, V2, V3, V4, direct the sample to the absorption photometer 17 via the switching valve V 5, spectrophotometric (E26
Measure 0). And valves V1, V2, V3, V4
By sequentially switching the measurement, the state of the activated carbon in the depth direction of the activated carbon treatment tower 10 is confirmed.
【００４１】このようにしてＥ２６０の測定結果から活
性炭の劣化が確認された場合には、一旦活性炭処理を停
止し、引抜きを容易にするため、予め貯留しておいた活
性炭処理水を逆流洗浄ポンプ等を利用して処理塔１０内
に流入させ、この処理水によって活性炭を１５０％程度
に膨張させる。そして活性炭処理塔１０の下部から劣化
した活性炭層を引抜用ポンプＰ4を用いて所定量引抜い
て、処理塔１０の下部から湿潤状態の新炭２０を活性炭
供給用ポンプＰ5、又は図示しない逆洗用ポンプを利用
して引抜いた分だけの活性炭を供給する。尚、活性炭供
給用ポンプＰ6を利用して処理塔１０の上部から活性炭
２０を供給することもできる。In the case where deterioration of the activated carbon is confirmed from the measurement result of E260 in this way, the activated carbon treatment is temporarily stopped, and in order to facilitate the extraction, the activated carbon treated water stored in advance is washed with a backwashing pump. The activated carbon is caused to flow into the treatment tower 10 by using the water or the like, and the activated water is expanded to about 150% by the treated water. The activated carbon layer was degraded from the bottom of the activated carbon treatment column 10 a predetermined amount withdrawn using a drawing pump P 4, activated carbon supply pump P 5 new charcoal 20 in the wet state from the bottom of the treatment column 10, or (not shown) opposite Use the washing pump to supply as much activated carbon as it is pulled out. It is also possible to supply the activated carbon 20 from the upper portion of the processing tower 10 by using the activated carbon supply pump P 6.
【００４２】次にエアーによる洗浄と逆流洗浄を行い、
新炭２０の微粉炭抜きと活性炭逆流洗浄を行った後、活
性炭処理塔１０の運転を再開する。Next, cleaning with air and backwashing are performed.
After the pulverized coal removal of the new coal 20 and the activated carbon backwashing, the operation of the activated carbon treatment tower 10 is restarted.
【００４３】次に活性炭処理塔１０としての水質モニタ
リングに基づく実施態様例を以下に説明する。先ず固定
床活性炭処理塔１０の汚濁物質の吸着能を確認するた
め、切換バルブＶ5をポンプＰ2側へ切り換えて、活性炭
被処理水貯留槽１８からフィルタＦ5，バルブＶ6，ポン
プＰ2及び前記切換バルブＶ5を介して吸光光度計１７に
被処理水を導いてＥ２６０を測定する。次に切換バルブ
Ｖ5をポンプＰ3側へ切り換えて、活性炭処理水貯留槽１
９からフィルタＦ6，バルブＶ7，ポンプＰ3及び前記切
換バルブＶ5を介して吸光光度計１７に処理された水を
導いて同様にＥ２６０を測定する。Next, an embodiment based on water quality monitoring as the activated carbon treatment tower 10 will be described below. Since first check adsorbability of pollutants fixed bed activated carbon treatment column 10, by switching the switching valve V 5 to the pump P 2 side, the filter F 5 from the activated carbon treated water storage tank 18, the valve V 6, pump P 2 and E260 to measure direct the water to be treated absorption photometer 17 via the switching valve V 5. Then it switches the switch valve V 5 to the pump P 3 side, the activated carbon treated water storage tank 1
The treated water is guided from 9 through the filter F 6 , the valve V 7 , the pump P 3 and the switching valve V 5 to the absorptiometer 17 and the E260 is measured in the same manner.
【００４４】上記の測定結果から固定床活性炭処理塔１
０自体の吸着能を判断することが可能であり、この吸着
能を定期的にモニタリングして該吸着能が低下した場合
には、活性炭処理塔１０内に充填された活性炭の少なく
とも一部が劣化したものと判断して、前記した基本的操
作態様に基づいて活性炭処理塔１０の深さ方向の活性炭
の状態を確認し、劣化した活性炭を引抜くとともにこの
引抜量に相当する新炭を供給する。From the above measurement results, the fixed bed activated carbon treatment tower 1
It is possible to judge the adsorption capacity of the activated carbon itself, and when the adsorption capacity is periodically monitored and the adsorption capacity is reduced, at least a part of the activated carbon filled in the activated carbon treatment tower 10 is deteriorated. Judging that the activated carbon has been checked, the state of the activated carbon in the depth direction of the activated carbon treatment tower 10 is confirmed based on the basic operation mode described above, and the deteriorated activated carbon is withdrawn and fresh carbon equivalent to the withdrawn amount is supplied. .
【００４５】更に他のモニタリング例として、活性炭処
理塔１０への通水開始直後はサンプル採水口１３，１４
からの採水を重点的に行い、通水開始後数ケ月はサンプ
ル採水口１４，１５からの採水を、又、長期間経過後
（例えば１年以上）は、サンプル採水口１５，１６から
の採水を重点的に行うような実施態様とすることも出来
る。この実施態様は、活性炭処理塔１０に対する通水時
間と活性炭の劣化との相関に関する知見から導き出され
たモニタリング方法であり、この方法は常時吸光光度を
測定しなくても良いため、操作が簡易化されるという利
点がある。As another monitoring example, immediately after the start of water flow to the activated carbon treatment tower 10, the sample water sampling ports 13, 14 are provided.
Water sampling from the water sampling ports 14 and 15 for several months after the start of water flow, and from the water sampling ports 15 and 16 after a long period of time (for example, one year or more). It is also possible to adopt an embodiment in which water sampling is performed with emphasis. This embodiment is a monitoring method derived from the knowledge on the correlation between the water flow time to the activated carbon treatment tower 10 and the deterioration of the activated carbon. This method does not require the continuous measurement of the absorbance, which simplifies the operation. There is an advantage that it is done.
【００４６】[0046]
【発明の効果】以上詳細に説明したように、本発明にか
かる固定床活性炭処理塔における粒状活性炭の供給引抜
方法によれば、以下に記す各種効果が得られる。即ち、
固定床活性炭処理塔における汚濁物質吸着能が低下した
際に、活性炭処理塔内の深さ方向におけるどの部分の活
性炭が劣化したかを感知して、劣化した活性炭のみを選
んで引抜いて新炭を補充するいう作業を実施することが
できる。従って処理塔内に充填されている活性炭全部を
交換する必要がなく、しかも活性炭が定常状態に達する
までの時間が短縮されて、運転上の支障が生じることが
ないという効果をもたらす。As described above in detail, according to the method for supplying and extracting granular activated carbon in the fixed bed activated carbon treatment tower according to the present invention, the following various effects can be obtained. That is,
When the pollutant adsorption capacity in the fixed-bed activated carbon treatment tower decreases, it is detected which part of the activated carbon in the depth direction inside the activated carbon treatment tower has deteriorated, and only the deteriorated activated carbon is selected and extracted to remove new coal. The task of refilling can be performed. Therefore, there is no need to replace all the activated carbon charged in the treatment tower, and the time required for the activated carbon to reach a steady state is shortened, so that there is no effect on operation.
【００４７】更に新炭の供給時に、生物分解性有機物に
起因する活性炭処理層の処理負荷の増大をなくし、被吸
着物質の破過を防止するとともに、高度浄水処理装置に
おける活性炭処理作用が一層高められるという大きな効
果が得られる。Further, when the new coal is supplied, it is possible to eliminate the increase in the treatment load of the activated carbon treatment layer caused by the biodegradable organic substances, prevent breakthrough of the substance to be adsorbed, and further enhance the activated carbon treatment effect in the advanced water purification treatment apparatus. Is obtained.
【図１】本発明を適用した固定床活性炭処理塔における
粒状活性炭の引抜及び供給方法の基本的実施例を示す概
要図。FIG. 1 is a schematic diagram showing a basic example of a method for extracting and supplying granular activated carbon in a fixed bed activated carbon treatment tower to which the present invention is applied.
【図２】本発明を適用した高度浄水処理実験装置の概要
図。FIG. 2 is a schematic diagram of an advanced water purification treatment experimental apparatus to which the present invention is applied.
【図３】固定床活性炭処理塔における生物活性炭処理層
と活性炭処理層の吸着除去特性をモデル化した概要図。FIG. 3 is a schematic diagram modeling the adsorption removal characteristics of a biological activated carbon treatment layer and an activated carbon treatment layer in a fixed bed activated carbon treatment tower.
【図４】活性炭処理塔内流下方向の経時的な各種測定結
果を示すグラフ。FIG. 4 is a graph showing various measurement results over time in a downflow direction in an activated carbon treatment tower.
【図５】活性炭処理における各有機物指標の等温吸着線
を示すグラフ。FIG. 5 is a graph showing an isothermal adsorption line of each organic substance index in activated carbon treatment.
１…原水 ２…オゾン接触槽 ３，４，５…活性炭処理塔 １０…固定床活性炭処理塔 １１…生物活性炭処理層 １２…活性炭処理層 １３，１４，１５，１６…サンプル採水口 １７…吸光光度計 １８…活性炭被処理水貯留槽 １９…活性炭処理水貯留槽 ２０…新炭 DESCRIPTION OF SYMBOLS 1 ... Raw water 2 ... Ozone contact tank 3, 4, 5 ... Activated carbon treatment tower 10 ... Fixed bed activated carbon treatment tower 11 ... Biological activated carbon treatment layer 12 ... Activated carbon treatment layer 13, 14, 15, 16 ... Sample water sampling port 17 ... Absorbance Total 18: Activated carbon treated water storage tank 19: Activated carbon treated water storage tank 20: New charcoal
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 1/28 B01D 29/38 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) C02F 1/28 B01D 29/38
Claims (3)
流入して、活性炭の持つ吸着能を利用して原水中の汚濁
物質を吸着除去するようにした高度浄水処理における固
定床活性炭処理塔において、 上記固定床活性炭処理塔の深さ方向に複数段のサンプル
採水口を設け、各サンプル採水口から採取した水を別々
に吸光光度計に導いて吸光光度を測定し、この測定結果
から活性炭の劣化が確認された際に、引抜用ポンプによ
り該活性炭処理塔から劣化した活性炭を所定量引抜い
て、供給用ポンプにより引き抜いた分だけの新炭を供給
することを特徴とする、固定床活性炭処理塔における粒
状活性炭の引抜及び供給方法。1. A fixed-bed activated carbon treatment tower in an advanced water purification treatment wherein raw water flows into a treatment tower filled with granular activated carbon, and a pollutant in the raw water is adsorbed and removed by utilizing the adsorption capacity of the activated carbon. In the fixed bed activated carbon treatment tower in the depth direction of a plurality of sample water inlets are provided, water collected from each sample water inlet is separately led to an absorptiometer, and the absorbance is measured. Characterized in that when the deterioration of the activated carbon is confirmed, a predetermined amount of the degraded activated carbon is withdrawn from the activated carbon treatment tower by the drawing pump and fresh carbon is supplied only by the amount withdrawn by the supply pump. A method for drawing and supplying granular activated carbon in a treatment tower.
流入して、活性炭の持つ吸着能を利用して原水中の汚濁
物質を吸着除去するようにした高度浄水処理における固
定床活性炭処理塔において、 上記固定床活性炭処理塔の深さ方向に複数段のサンプル
採水口を設け、各サンプル採水口から採取した水を別々
に吸光光度計に導いて吸光光度を測定する一方、活性炭
処理塔に流入する被処理水と、活性炭処理塔から流出す
る処理水を別々に前記吸光光度計に導いて吸光光度を測
定し、この測定結果から固定床活性炭処理塔の全体的な
吸着能をモニタリングして、該処理塔の吸着能が低下し
た際に前記各サンプル採水口における測定結果に基づい
て、劣化が確認された活性炭を引抜用ポンプにより所定
量引抜き、供給用ポンプにより引き抜いた分だけの新炭
を供給することを特徴とする、固定床活性炭処理塔にお
ける粒状活性炭の引抜及び供給方法。2. A fixed-bed activated carbon treatment tower in an advanced water purification treatment in which raw water flows into a treatment tower filled with granular activated carbon, and a pollutant in the raw water is adsorbed and removed by utilizing the adsorption capacity of the activated carbon. In the fixed bed activated carbon treatment tower in the depth direction of a plurality of sample water inlets provided, water collected from each sample water inlet is separately led to an absorptiometer to measure the absorbance, while the activated carbon treatment tower The inflowing treated water and the treated water flowing out of the activated carbon treatment tower are separately led to the absorptiometer to measure the absorbance, and the overall adsorption capacity of the fixed bed activated carbon treatment tower is monitored from the measurement result. When the adsorption capacity of the treatment tower is reduced, a predetermined amount of activated carbon, which has been confirmed to be deteriorated, is extracted by the extraction pump based on the measurement result at each sample water inlet, and the amount of the activated carbon is extracted by the supply pump. And supplying the only new charcoal, drawing and the method of supplying the granular activated carbon in a fixed bed activated carbon treatment column.
炭の劣化との相関に基づいて、活性炭処理塔への通水開
始直後は上段のサンプル採水口からの採水を重点的に行
い、通水開始後数ケ月は中段のサンプル採水口からの採
水を、更に長期間経過後は、下段のサンプル採水口から
の採水を重点的に行うようにした請求項１，２記載の固
定床活性炭処理塔における粒状活性炭の引抜及び供給方
法。3. Based on the correlation between the water flow time to the activated carbon treatment tower and the deterioration of the activated carbon, immediately after the start of water flow to the activated carbon treatment tower, the water sampling from the upper sample water sampling port is performed with priority. The fixed bed according to claim 1 or 2, wherein water sampling from the sample water sampling port at the middle stage is performed several months after the start of water, and water sampling from the sample water sampling port at the lower stage is performed after a long period of time. A method for drawing and supplying granular activated carbon in an activated carbon treatment tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04095711A JP3139123B2 (en) | 1992-04-16 | 1992-04-16 | Extraction and supply method of granular activated carbon in fixed bed activated carbon treatment tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04095711A JP3139123B2 (en) | 1992-04-16 | 1992-04-16 | Extraction and supply method of granular activated carbon in fixed bed activated carbon treatment tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05293461A JPH05293461A (en) | 1993-11-09 |
| JP3139123B2 true JP3139123B2 (en) | 2001-02-26 |
Family
ID=14145082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04095711A Expired - Fee Related JP3139123B2 (en) | 1992-04-16 | 1992-04-16 | Extraction and supply method of granular activated carbon in fixed bed activated carbon treatment tower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3139123B2 (en) |
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|---|---|---|---|---|
| JP4814619B2 (en) * | 2005-11-11 | 2011-11-16 | 株式会社広洋技研 | Activated carbon adsorption device |
| FR3114094B1 (en) * | 2020-09-17 | 2023-01-20 | Suez Groupe | FLUID TREATMENT PROCESS AND PLANT |
| FR3114093A1 (en) * | 2020-09-17 | 2022-03-18 | Suez Groupe | Water treatment process with renewal of the adsorbent at a targeted intermediate age |
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1992
- 1992-04-16 JP JP04095711A patent/JP3139123B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05293461A (en) | 1993-11-09 |
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