JP2554560B2 - Method and apparatus for biological regeneration of activated carbon - Google Patents
Method and apparatus for biological regeneration of activated carbonInfo
- Publication number
- JP2554560B2 JP2554560B2 JP3108239A JP10823991A JP2554560B2 JP 2554560 B2 JP2554560 B2 JP 2554560B2 JP 3108239 A JP3108239 A JP 3108239A JP 10823991 A JP10823991 A JP 10823991A JP 2554560 B2 JP2554560 B2 JP 2554560B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- packed bed
- adsorption tower
- water
- liquid level
- 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 - Lifetime
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 228
- 238000011069 regeneration method Methods 0.000 title claims description 29
- 230000008929 regeneration Effects 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 21
- 239000007788 liquid Substances 0.000 claims description 49
- 238000001179 sorption measurement Methods 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 24
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- 239000001301 oxygen Substances 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 20
- 239000005416 organic matter Substances 0.000 claims description 16
- 230000001172 regenerating effect Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 244000005700 microbiome Species 0.000 description 10
- 238000007796 conventional method Methods 0.000 description 8
- 239000002351 wastewater Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Treatment Of Biological Wastes In General (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、下水・し尿・産業排水
などの各種有機性汚水の処理に使用して、もはや有機物
吸着能力が飽和乃至は低下した活性炭を、効率的に生物
再生する方法に関するものである。FIELD OF THE INVENTION The present invention relates to a method for efficiently regenerating biologically activated carbon whose organic substance adsorption capacity is already saturated or reduced by being used for the treatment of various organic wastewater such as sewage, night soil and industrial wastewater. It is about.
【０００２】[0002]
【従来の技術】活性炭処理方法は、広範な有機性汚濁物
質を活性炭の吸着作用により排水中から除去する方法で
あるが、活性炭の価格が高いために処理コストの増加が
問題となっている。処理コストの低減のためには、使用
済み活性炭の再生が有効である。現在行われている主な
再生方法は、活性炭を吸着塔から系外に抜き出し、別途
設けた再生装置内で加熱再生する方法である。しかし、
この方法は再生手段が煩雑であり、また再生に要するコ
ストが安くない。そこで再生手段を簡素化し、かつ再生
コストの低減化を目的として、活性炭を吸着塔内で微生
物の有機物分解作用により再生する方法が行われている
（例えば、特開昭６３−１７８８８７号公報「水処理用
活性炭の再生方法」）。しかし従来の生物再生方法で
は、活性炭の再生率が高くないこと、また吸着塔内の液
中に活性炭を浸漬して曝気することで再生するために、
多くの活性炭が物理的な剪断によって破壊されることが
問題になっていた。2. Description of the Related Art A method for treating activated carbon is a method for removing a wide range of organic pollutants from wastewater by the adsorption action of activated carbon. However, since the price of activated carbon is high, an increase in treatment cost is a problem. In order to reduce the treatment cost, it is effective to recycle used activated carbon. The main regeneration method currently performed is a method in which activated carbon is extracted from the adsorption tower to the outside of the system and heated and regenerated in a separately provided regeneration device. But,
In this method, the reproducing means is complicated, and the cost required for reproducing is not low. Therefore, for the purpose of simplifying the regeneration means and reducing the regeneration cost, a method of regenerating activated carbon by an organic substance decomposing action of microorganisms in an adsorption tower has been performed (for example, Japanese Patent Laid-Open No. 63-178887). Regeneration of activated carbon for treatment "). However, in the conventional biological regeneration method, the regeneration rate of activated carbon is not high, and in order to regenerate it by immersing the activated carbon in the liquid in the adsorption tower and aerating it,
It has been a problem that many activated carbons are destroyed by physical shearing.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、従来法にく
らべで活性炭の再生率が高く、かつ再生中に活性炭が破
壊しない生物再生方法を提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a biological regeneration method in which the activated carbon has a higher regeneration rate than the conventional method and the activated carbon is not destroyed during regeneration.
【０００４】[0004]
【課題を解決するための手段】本発明は、下記〜に
記載のものであり、これにより上記課題を解決できる。 有機物吸着能力が飽和乃至は低下した活性炭を吸着
塔内で生物再生する方法において、吸着塔内の液位を活
性炭充填層下端よりも低くあるいは活性炭充填層内に保
ちつつ活性炭充填層に少なくとも酸素および水を含むガ
スを通過させることを特徴とする活性炭の生物再生方
法。 吸着塔内の液位を活性炭充填層下端よりも低くある
いは活性炭充填層内に保ちつつ該吸着塔内の液内に空気
を通気して活性炭充填層に溶存酸素を含む湿潤空気を供
給することを特徴とする上記記載の活性炭の生物再生
方法。 有機物吸着能力が飽和乃至は低下した活性炭を吸着
塔内で生物再生する装置において、吸着塔に吸着塔内の
液位を活性炭充填層下端よりも低くあるいは活性炭充填
層内に保ちつつ活性炭充填層に少なくとも酸素および水
を含むガスを通過させるための装置を配備したことを特
徴とする活性炭の生物再生装置。The present invention is as described in the following items (1) to (3), which can solve the above problems. In a method of biologically regenerating an activated carbon having a saturated or reduced organic matter adsorption capacity in an adsorption tower, at least oxygen and oxygen are contained in the activated carbon packed bed while maintaining the liquid level in the adsorption tower lower than the lower end of the activated carbon packed bed or in the activated carbon packed bed. A method for bioregenerating activated carbon, which comprises passing a gas containing water. While maintaining the liquid level in the adsorption tower lower than the lower end of the activated carbon packed bed or in the activated carbon packed bed, air is ventilated into the liquid in the adsorption tower to supply wet air containing dissolved oxygen to the activated carbon packed bed. The method for bioregenerating activated carbon according to the above, which is characterized in that In an apparatus for biologically regenerating activated carbon whose organic matter adsorption capacity is saturated or reduced in an adsorption tower, the adsorption tower has a liquid level in the adsorption tower lower than the lower end of the activated carbon packed bed or kept in the activated carbon packed bed while maintaining it in the activated carbon packed bed. A bioregeneration device for activated carbon, comprising a device for passing a gas containing at least oxygen and water.
【０００５】本発明は、吸着塔内の液位を活性炭充填層
下端よりも低くあるいは活性炭充填層内に保ちつつ活性
炭充填層に少なくとも酸素および水を含むガスを通過さ
せること、即ち、活性炭充填層内に被処理液を実質的に
存在させないか、あるいは一部浸漬状態となるように液
位を吸着塔内の活性炭充填層下端より低くまたは活性炭
充填層内に設定して活性炭充填層に少なくとも酸素およ
び水を含むガスを通過させることにより充填層に微生物
を繁殖させて活性炭により被処理液を通水して捕獲され
た活性炭に吸着した有機物を微生物呼吸により酸化分解
すると共に有機物を含む液を活性炭から脱離させて充填
層空間を通して落下させて除去することにより活性炭の
再生の効率を高めるものである。ここで、少なくとも酸
素および水を含むガスとは、酸素および水を含むもので
あれば、特に制限なく、微生物の繁殖が維持されるもの
であればよく、単なる通常の空気、相対湿度の高い空
気、空気と同じガス成分でその組成比が異なるもの、空
気と全く組成が異なりかつ微生物の成育に悪影響を与え
ない任意のガスからなるもの等が包含されるが、特に空
気を液と接触させ溶存酸素を含む湿潤空気としてから活
性炭と接触するようにするのが特に好ましい。また、少
なくとも酸素および水を含むガスの供給に際してはその
酸素量および水量を適宜時間的に変更して用いてもよ
い。いずれにせよ、活性炭と接触するときに酸素と湿気
を有し、微生物の繁殖が維持できればかまわない。ま
た、少なくとも酸素および水を含むガスは、加温して用
いてもよく、例えば、５０〜６０℃に加温することがで
きる。ここで、活性炭充填層に少なくとも酸素および水
を含むガスを通過させる方法および装置は任意の手段が
適用できる。例えば、吸着塔内の液位を活性炭充填層下
端よりも低くあるいは活性炭充填層内に保ちつつ該吸着
塔内の液内に空気または任意のガスを通気することによ
り容易にこの目的を達することができるので好ましい。
また、該吸着塔内の液を完全に除去して直接制御された
酸素量、水量を有するガスを直接活性炭充填層に通して
もよい。あるいは、前記方法とこの方法の併用でもよ
い。この様に充填層下端よりも低い位置あるいは活性炭
充填層内に液位を設定する手段としては、充填層下部の
吸着塔内に任意の空間を設けるのが一般的である。この
空間は多孔板等により仕切られて形成されたものでも、
あるいは砂利等で該空間を埋めた層でもよい。この液位
を設定するための液排出手段は特に制限なく公知の手段
を適用できるが、例示すれば、再生前の吸着塔として機
能させた時に使用する集水装置に必要により液位調整口
を設けること、他の任意の排水口を塔壁に設ける等が挙
げられる。該集水装置は、本発明により脱離された有機
物、あるいは再生された活性炭表面を洗浄するための洗
浄水を充填層に供給するための装置としても機能でき
る。この場合、該充填層下端より下に液位を有する液に
空気を通してもしくは直接少なくとも酸素および水を含
むガスを直接活性炭充填層に供給する散気部材を充填層
下端より下に設けることが好ましい。尚、充填層内部に
散気装置を配備もしくは併用してもよい。散気部材は、
通常ブロワーと連絡され、所望の空気量が散気部材に設
けられる孔から供給される。また、上記集水装置と散気
部材は、一体的に構成してもよく、ブロック構造等でも
よい。本発明において、液にガス、好ましくは空気を通
して少なくとも酸素および水を含むガスを形成する場合
には、空気吹き込み量は充填面積１ｍ3 当たり０．７ｍ
3 ／分以下、好ましくは０．５ｍ3 ／分以下である。ま
た、活性炭充填層に供給される少なくとも酸素および水
を含むガスの相対湿度としては、例えば、７０％以上、
好ましくは９０％以上がよい。本発明により脱離された
有機物等の汚濁物質の吸着塔からの排除方法は特に制限
はないが、一般的には洗浄水を充填層に供給して充填層
の上に設けた排出管により排出することできる。According to the present invention, a gas containing at least oxygen and water is passed through the activated carbon packed bed while keeping the liquid level in the adsorption tower lower than the lower end of the activated carbon packed bed or in the activated carbon packed bed, that is, the activated carbon packed bed. The liquid to be treated does not substantially exist therein, or the liquid level is set to be lower than the lower end of the activated carbon packed bed in the adsorption tower or set within the activated carbon packed bed so that at least oxygen is contained in the activated carbon packed bed. By passing a gas containing water and water, the microorganisms are propagated in the packed bed and the liquid to be treated is passed through by the activated carbon to oxidize and decompose the organic matter adsorbed on the activated carbon captured by the microorganism and to recycle the liquid containing the organic matter into the activated carbon. The efficiency of the regeneration of the activated carbon is enhanced by desorbing the activated carbon and dropping it through the space of the packed bed to remove it. Here, the gas containing at least oxygen and water is not particularly limited as long as it contains oxygen and water, as long as the growth of microorganisms is maintained, mere normal air, air with high relative humidity. , The same gas component as air but having a different composition ratio, and a gas completely different in composition from air and consisting of any gas that does not adversely affect the growth of microorganisms, etc. It is particularly preferred that the moist air containing oxygen is brought into contact with the activated carbon. Further, when supplying a gas containing at least oxygen and water, the amount of oxygen and the amount of water may be appropriately changed with time. In any case, it does not matter if it has oxygen and moisture when it comes into contact with the activated carbon and can maintain the growth of microorganisms. Further, the gas containing at least oxygen and water may be heated and used, for example, it may be heated to 50 to 60 ° C. Here, any means can be applied to the method and apparatus for passing the gas containing at least oxygen and water through the activated carbon packed bed. For example, this purpose can be easily achieved by ventilating air or any gas into the liquid in the adsorption tower while keeping the liquid level in the adsorption tower lower than the lower end of the activated carbon packed bed or in the activated carbon packed bed. It is preferable because it is possible.
Alternatively, the liquid in the adsorption tower may be completely removed and a gas having a controlled oxygen amount and water amount may be directly passed through the activated carbon packed bed. Alternatively, the above method and this method may be used in combination. As a means for setting the liquid level at a position lower than the lower end of the packed bed or in the activated carbon packed bed, it is general to provide an arbitrary space in the adsorption tower below the packed bed. Even if this space is formed by partitioning with a perforated plate,
Alternatively, it may be a layer in which the space is filled with gravel or the like. As the liquid discharging means for setting the liquid level, known means can be applied without particular limitation, but as an example, a water collecting device used when functioning as an adsorption tower before regeneration has a liquid level adjusting port if necessary. It may be provided, or any other drainage port may be provided on the tower wall. The water collecting device can also function as a device for supplying, to the packed bed, the cleaning water for cleaning the organic matter desorbed according to the present invention or the regenerated activated carbon surface. In this case, it is preferable to provide an air diffuser below the lower end of the packed bed for supplying air to a liquid having a liquid level below the lower end of the packed bed or directly supplying a gas containing at least oxygen and water directly to the activated carbon packed bed. An air diffuser may be provided inside the packed bed or used together. The air diffuser is
Usually in communication with a blower, the desired amount of air is supplied through holes provided in the diffuser. The water collecting device and the air diffusing member may be integrally formed, or may have a block structure or the like. In the present invention, when a gas, preferably air, is passed through the liquid to form a gas containing at least oxygen and water, the amount of air blown is 0.7 m per 1 m 3 of the filling area.
3 / min or less, preferably 0.5 m 3 / min or less. The relative humidity of the gas containing at least oxygen and water supplied to the activated carbon packed bed is, for example, 70% or more,
90% or more is preferable. The method of removing the pollutants such as organic substances desorbed according to the present invention from the adsorption tower is not particularly limited, but generally, washing water is supplied to the packed bed and discharged through a discharge pipe provided on the packed bed. You can do it.
【０００６】[0006]
【作用】従来の生物再生方法の機構は、まず活性炭周囲
の液中有機物を微生物により分解することで液中有機物
濃度を低下させ、その結果活性炭内部に吸着されていた
有機物が拡散によって活性炭から脱離する。この繰り返
しにより活性炭が再生されると考えられる。従って、活
性炭を液中に浸漬する従来法では、活性炭周囲の液の有
機物濃度が高くなると有機物の脱離速度が低下し、結果
として再生率が低くなると考えられる。一方、本発明は
活性炭を液中に浸漬せず、微生物の生存に必要な水分と
酸素をガスにより活性炭充填層に供給し、有機物を微生
物処理して除去すると共に脱離有機物を含む液は活性炭
と直接接触しない吸着塔下部へ落ちるようになってい
る。従って、本発明は原理的に考えて、従来法よりも再
生率を高くすることができる。また、従来法では、浸漬
液中で活性炭を曝気するために、多くの活性炭が相互作
用の摩擦に起因する剪断力によって破壊する。その結
果、活性炭の歩留りが低下していた。一方、本発明は活
性炭を液中に浸漬しないために、活性炭同士が摩擦によ
って破壊することが少ない。その結果、活性炭の歩留り
向上が可能である。The mechanism of the conventional biological regeneration method is that the organic matter in the liquid around the activated carbon is decomposed by microorganisms to lower the concentration of the organic matter in the liquid, and as a result, the organic matter adsorbed inside the activated carbon is removed from the activated carbon by diffusion. Let go. It is considered that the activated carbon is regenerated by repeating this process. Therefore, in the conventional method of immersing the activated carbon in the liquid, it is considered that when the concentration of the organic substances in the liquid around the activated carbon is high, the desorption rate of the organic substances is decreased, resulting in a low regeneration rate. On the other hand, the present invention does not immerse the activated carbon in the liquid, supplies moisture and oxygen necessary for the survival of the microorganisms to the activated carbon packed bed by gas, removes the organic matter by microbial treatment and removes the liquid containing the desorbed organic matter. It is designed to fall to the bottom of the adsorption tower that does not come into direct contact with. Therefore, in the present invention, in principle, the reproduction rate can be made higher than that of the conventional method. Further, in the conventional method, since the activated carbon is aerated in the immersion liquid, many activated carbons are destroyed by the shearing force caused by the friction of the interaction. As a result, the yield of activated carbon was reduced. On the other hand, in the present invention, since activated carbon is not immersed in the liquid, activated carbon is less likely to be broken by friction. As a result, the yield of activated carbon can be improved.
【０００７】[0007]
【実施例】本発明の効果を実施例に従って説明するが、
本発明はこれに限定されるものではない。図１に本発明
の方法が適用できる具体的装置の一例を示す。図１の活
性炭の生物再生装置１は、都市下水二次処理水のＣＯＤ
成分の除去を目的に設置された活性炭吸着塔を使用した
ものであり、該活性炭の生物再生装置１は、活性炭吸着
塔２と該塔内に配備された塔内の液位を制御するための
液位調整口３を有する集水装置４および活性炭充填層５
に溶存酸素を含む湿潤空気を供給するために空気を該塔
内液に通すための散気部材６を配備した構成である。上
記装置を用いた本発明の方法を説明する前に活性炭吸着
塔２の通常機能を説明すると、これは、該塔内２に有機
性汚水を導入し、活性炭充填層５にて濾過された処理水
７は集水装置４にて集水されて取り出される。この有機
性汚水の処理の継続により、活性炭充填層５に捕捉され
た有機物により活性炭の吸着機能が飽和もしくは低下す
る状態になったら、槽２内の液を液位調整口から排出す
ることにより液位８を活性炭充填層下端９よりも低い位
置に設定し、散気部材から空気１０を液１１に通すこと
により活性炭充填層５に溶存酸素を含む湿潤空気が供給
され、活性炭表面に微生物を繁殖させて充填層内に捕獲
されている有機物を該微生物により酸化除去すると共に
未酸化有機物を活性炭から脱離させて支持砂利層１２に
滑落させることにより活性炭の再生を計るものである。
該脱離有機物の排出は空気の供給を止めあるいは所望に
より軽微な散気を供給する工程を含ませて、洗浄水１３
を集水装置４から吸着塔２内に導入して有機物を洗浄水
に浮上させて洗浄排水１４として排出することができ
る。尚、脱離有機物の除去は、直接吸着塔下部から吸引
除去等の方法で系外に除去することもできる。なお、実
施例では、活性炭充填層下端よりも低い位置に液位を設
定して行ったが、活性炭充填層内に液位を設定して一部
だけ浸漬させた状態としてもよい。EXAMPLES The effects of the present invention will be described with reference to Examples.
The present invention is not limited to this. FIG. 1 shows an example of a specific apparatus to which the method of the present invention can be applied. The activated carbon biological regeneration device 1 of FIG.
An activated carbon adsorption tower installed for the purpose of removing components is used. The activated carbon biological regeneration apparatus 1 is for controlling the activated carbon adsorption tower 2 and the liquid level in the tower provided in the tower. Water collecting device 4 having liquid level adjusting port 3 and activated carbon packed bed 5
In order to supply the moist air containing dissolved oxygen, a diffusing member 6 for passing air through the liquid in the tower is provided. Before explaining the method of the present invention using the above apparatus, the normal function of the activated carbon adsorption tower 2 will be explained. This is the treatment of introducing organic wastewater into the tower 2 and filtering the activated carbon packed bed 5. The water 7 is collected by the water collecting device 4 and taken out. By continuing the treatment of this organic wastewater, when the adsorbing function of the activated carbon is saturated or lowered by the organic matter captured in the activated carbon packed bed 5, the liquid in the tank 2 is discharged from the liquid level adjusting port. The position 8 is set to a position lower than the lower end 9 of the activated carbon packed bed, and the moist air containing dissolved oxygen is supplied to the activated carbon packed bed 5 by passing the air 10 through the liquid 11 from the air diffusing member to propagate the microorganisms on the surface of the activated carbon. Then, the organic matter captured in the packed bed is oxidized and removed by the microorganism, and the unoxidized organic matter is desorbed from the activated carbon and slid down to the supporting gravel layer 12 to regenerate the activated carbon.
The discharge of the desorbed organic matter includes a step of stopping the supply of air or supplying a slight amount of air to the cleaning water 13
Can be introduced into the adsorption tower 2 from the water collecting device 4 to float the organic matter on the wash water and discharge it as the wash drainage 14. The desorbed organic substances can be removed from the system directly by suction from the lower part of the adsorption tower. In the example, the liquid level was set at a position lower than the lower end of the activated carbon packed bed, but the liquid level may be set in the activated carbon packed bed and only a part of it may be immersed.
【０００８】[0008]
【実験例】都市下水二次処理水のＣＯＤ成分の除去を目
的に設置された活性炭吸着塔を使用して本発明と従来法
とを比較検討した。吸着塔の寸法は、内径８００ｍｍ×
高さ３０００ｍｍ、充填した活性炭は石炭系破砕炭（粒
径８〜３２メッシュ）、活性炭充填高さは１０００ｍｍ
である。この活性炭の履歴は、通水倍率（累積通水量／
活性炭充填容積）で示すと１５０００倍を経ており、Ｃ
ＯＤ除去率は当初８５％であったものが２０％まで低下
し、吸着能力は飽和に近い状態と考えられた。この吸着
塔の１塔（Ａ塔と称する）を従来法で生物再生し、別の
１塔（Ｂ塔と称する）を本発明法により生物再生した。
即ち、Ａ塔の液位は活性炭充填層全体が浸漬する液位と
し、Ｂ塔の液位は活性炭充填層の下部３００ｍｍとし
た。空気の通気速度は両者ともに、０．０１Ｎｍ3 ／ｍ
2 ・分とした。図２にＡ塔の断面図を示す。従来法およ
びこの装置を以下簡単に本発明と異なる所を主体に説明
すると、液位８を活性炭充填層５の上部に設定し、散気
部材６から上記空気を充填層５に供給して上記作用の項
で説明した通りに活性炭の再生を計るものである。従っ
て、本発明における液位調整口３に相当する液位を充填
層下部に設定する部材は集水装置１５では設けていない
点が最も異なる。図３に再生日数と再生率の関係を示
す。なお活性炭の再生率は、塔内から定期的に一部の活
性炭を抜き出し、３％NaOH溶液に24時間浸漬して、活性
炭から溶出したCOD 量（g-COD/kg−活性炭) を測定する
ことで求めた。再生率（−）は、次式(a) から算出し
た。 〔再生率〕＝１−（測定日の溶出ＣＯＤ量／初日の溶出
ＣＯＤ量）…(a) 式 図３から明らかなように、従来法が２ヶ月で３０〜４０
％の再生率に留まったのに対して、本発明では２ヶ月で
５５〜６０％の再生率を得た。なお、本実施例が再生に
長時間を要したのは、活性炭に吸着されたＣＯＤ成分が
生物に難分解である下水二次処理水の残留ＣＯＤであっ
たためと考えられる。[Experimental example] The present invention and the conventional method were compared and examined using an activated carbon adsorption tower installed for the purpose of removing COD components of the secondary treated water of municipal wastewater. The size of the adsorption tower is 800 mm inside diameter
Height 3000 mm, filled activated carbon is coal-based crushed coal (particle size 8 to 32 mesh), activated carbon filling height is 1000 mm
Is. The history of this activated carbon is the water flow rate (cumulative water flow /
The volume of activated carbon) has reached 15,000 times, and C
Although the OD removal rate was initially 85%, it decreased to 20%, and the adsorption capacity was considered to be close to saturation. One of the adsorption towers (referred to as A tower) was bioregenerated by the conventional method, and another one (referred to as B tower) was bioregenerated by the method of the present invention.
That is, the liquid level of the tower A was a liquid level with which the entire activated carbon packed bed was immersed, and the liquid level of the tower B was 300 mm below the activated carbon packed layer. The aeration rate of air for both is 0.01 Nm 3 / m
2 minutes FIG. 2 shows a sectional view of the tower A. The conventional method and this apparatus will be briefly described below mainly with respect to the points different from the present invention. The liquid level 8 is set on the upper part of the activated carbon packed bed 5, and the air is supplied to the packed bed 5 from the air diffusing member 6. As described in the section of action, the regeneration of activated carbon is measured. Therefore, the difference is that the member for setting the liquid level corresponding to the liquid level adjusting port 3 in the lower portion of the packed bed in the present invention is not provided in the water collecting device 15. FIG. 3 shows the relationship between the number of reproduction days and the reproduction rate. For the regeneration rate of activated carbon, extract some of the activated carbon from the tower periodically, immerse it in 3% NaOH solution for 24 hours, and measure the amount of COD eluted from the activated carbon (g-COD / kg-activated carbon). I asked for. The regeneration rate (-) was calculated from the following equation (a). [Regeneration rate] = 1- (elution COD amount on the measurement day / elution COD amount on the first day) (a) Equation As is apparent from Fig. 3, the conventional method is 30 to 40 in 2 months.
In the present invention, the regeneration rate of 55 to 60% was obtained in 2 months, while the regeneration rate of only 5% was maintained. It is considered that the regeneration in this example took a long time because the COD component adsorbed on the activated carbon was the residual COD of the sewage secondary treated water, which is hardly decomposed by organisms.
【０００９】[0009]
【発明の効果】このように、本発明により活性炭を生物
再生することで、活性炭の再生率を向上できると共に、
活性炭の物理的な破壊を抑えることで歩留りを向上させ
ることが可能である。本発明は、今後の活性炭の生物再
生に広く取り入れられていくものである。As described above, by biologically regenerating the activated carbon according to the present invention, the regeneration rate of the activated carbon can be improved and
The yield can be improved by suppressing the physical destruction of the activated carbon. The present invention will be widely applied to biological regeneration of activated carbon in the future.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の具体的一例を説明するための断面図で
ある。FIG. 1 is a cross-sectional view for explaining a specific example of the present invention.
【図２】従来装置の具体的一例を説明するための断面図
である。FIG. 2 is a cross-sectional view for explaining a specific example of a conventional device.
【図３】図１、２に示した装置を使用した実験例の結果
を示したグラフである。FIG. 3 is a graph showing the results of an experimental example using the apparatus shown in FIGS.
１ 活性炭の生物再生装置 ２ 活性炭吸着塔 ３ 液位調整口 ４ 集水装置 ５ 活性炭充填層 ６ 散気部材 ７ 処理水 ８ 液位 ９ 活性炭充填層下端 10 空気 11 液 12 支持砂利層 13 洗浄水 14 洗浄排水 15 集水装置 1 Activated carbon biological regeneration device 2 Activated carbon adsorption tower 3 Liquid level adjusting port 4 Water collecting device 5 Activated carbon packed bed 6 Diffuser 7 Treated water 8 Liquid level 9 Activated carbon packed bed lower end 10 Air 11 Liquid 12 Support gravel layer 13 Wash water 14 Wash drain 15 Water collector
───────────────────────────────────────────────────── フロントページの続き (72)発明者 三島 浩二 東京都港区港南１丁目６番27号 荏原イ ンフィルコ株式会社内 (72)発明者 中村 弘志 東京都港区港南１丁目６番27号 荏原イ ンフィルコ株式会社内 (56)参考文献 特開 昭63−178887（ＪＰ，Ａ) 特開 昭54−47886（ＪＰ，Ａ) 特開 昭50−56394（ＪＰ，Ａ) 特開 昭53−102872（ＪＰ，Ａ) 特開 平３−38290（ＪＰ，Ａ) 特開 平３−161087（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continued Front Page (72) Koji Mishima 1-6-27 Konan, Minato-ku, Tokyo Ebara Infilco Co., Ltd. (72) Hiroshi Nakamura 1-6-27 Konan, Minato-ku, Tokyo Ebara Infilco Co., Ltd. (56) Reference JP-A-63-178887 (JP, A) JP-A-54-47886 (JP, A) JP-A-50-56394 (JP, A) JP-A-53-102872 ( JP, A) JP-A-3-38290 (JP, A) JP-A-3-161087 (JP, A)
Claims (3)
性炭を吸着塔内で生物再生する方法において、吸着塔内
の液位を活性炭充填層下端よりも低くあるいは活性炭充
填層内に保ちつつ活性炭充填層に少なくとも酸素および
水を含むガスを通過させることを特徴とする活性炭の生
物再生方法。1. A method for biologically regenerating activated carbon having a saturated or reduced organic substance adsorption capacity in an adsorption tower, wherein the liquid level in the adsorption tower is lower than the lower end of the activated carbon packed bed or while the activated carbon is packed in the activated carbon packed bed. A method for bioregenerating activated carbon, characterized in that a gas containing at least oxygen and water is passed through the bed.
も低くあるいは活性炭充填層内に保ちつつ該吸着塔内の
液内に空気を通気して活性炭充填層に溶存酸素を含む湿
潤空気を供給することを特徴とする請求項１記載の活性
炭の生物再生方法。2. Wet air containing dissolved oxygen in the activated carbon packed bed by aerating air into the liquid in the adsorption tower while keeping the liquid level in the adsorption tower lower than the lower end of the activated carbon packed bed or in the activated carbon packed bed. The method for biological regeneration of activated carbon according to claim 1, wherein
性炭を吸着塔内で生物再生する装置において、吸着塔に
吸着塔内の液位を活性炭充填層下端よりも低くあるいは
活性炭充填層内に保ちつつ活性炭充填層に少なくとも酸
素および水を含むガスを通過させるための装置を配備し
たことを特徴とする活性炭の生物再生装置。3. An apparatus for biologically regenerating activated carbon whose organic matter adsorption capacity is saturated or reduced in an adsorption tower, wherein the liquid level in the adsorption tower is kept lower than the lower end of the activated carbon packed bed or kept in the activated carbon packed bed. At the same time, a device for allowing a gas containing at least oxygen and water to pass through a packed bed of activated carbon is provided, and a biological regeneration device for activated carbon is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3108239A JP2554560B2 (en) | 1991-04-15 | 1991-04-15 | Method and apparatus for biological regeneration of activated carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3108239A JP2554560B2 (en) | 1991-04-15 | 1991-04-15 | Method and apparatus for biological regeneration of activated carbon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06339632A JPH06339632A (en) | 1994-12-13 |
| JP2554560B2 true JP2554560B2 (en) | 1996-11-13 |
Family
ID=14479603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3108239A Expired - Lifetime JP2554560B2 (en) | 1991-04-15 | 1991-04-15 | Method and apparatus for biological regeneration of activated carbon |
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| Country | Link |
|---|---|
| JP (1) | JP2554560B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055418C (en) * | 1995-12-14 | 2000-08-16 | 山东省泰安制丝厂 | Pressur gas-dissolving method for biological regeneration of active carbon |
| CN1505545A (en) * | 2001-02-28 | 2004-06-16 | 出光兴产株式会社 | Adsorbent regeneration method |
| CN109835965A (en) * | 2019-03-07 | 2019-06-04 | 安徽华星化工有限公司 | A kind of abraum salt active carbon for refining adsorbent equipment |
-
1991
- 1991-04-15 JP JP3108239A patent/JP2554560B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06339632A (en) | 1994-12-13 |
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