JPH0822438B2 - Regeneration method of immobilized microbial pellets - Google Patents
Regeneration method of immobilized microbial pelletsInfo
- Publication number
- JPH0822438B2 JPH0822438B2 JP2303197A JP30319790A JPH0822438B2 JP H0822438 B2 JPH0822438 B2 JP H0822438B2 JP 2303197 A JP2303197 A JP 2303197A JP 30319790 A JP30319790 A JP 30319790A JP H0822438 B2 JPH0822438 B2 JP H0822438B2
- Authority
- JP
- Japan
- Prior art keywords
- pellet
- pellets
- immobilized microbial
- immobilized
- wastewater treatment
- 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
- 239000008188 pellet Substances 0.000 title claims description 63
- 230000000813 microbial effect Effects 0.000 title claims description 18
- 238000011069 regeneration method Methods 0.000 title description 4
- 238000000034 method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 238000004065 wastewater treatment Methods 0.000 claims description 12
- 230000001172 regenerating effect Effects 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 9
- 244000005700 microbiome Species 0.000 description 9
- 239000003349 gelling agent Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000003860 storage Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 2
- 239000000017 hydrogel Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は固定化微生物ペレットの再生方法に関する。TECHNICAL FIELD The present invention relates to a method for regenerating immobilized microbial pellets.
一般に、廃水処理の分野で、微生物を含水ゲルに包括
固定化し粒状に成型したペレットを廃水処理槽内で流動
させて廃水を処理する方法が行われている。In general, in the field of wastewater treatment, a method of treating and treating wastewater by entrapping and fixing microorganisms in a water-containing gel and flowing pellets formed into granules in a wastewater treatment tank is performed.
この方法は、特定の微生物を安定して高濃度に保持で
き、処理水とペレットをスクリーン等を用いて容易に分
離できる等、他の方法にない特長をもっている。This method has features not found in other methods, such as being able to stably maintain a high concentration of specific microorganisms and easily separating treated water and pellets using a screen or the like.
ペレットは、通常、活性汚泥や、処理目的とした廃水
物質を用いて培養した微生物の濃縮液に、高分子含水ゲ
ルの材料液を混合し、ゲル化させて粒状ペレットに成型
することにより作製できる。ペレットの大きさは、ペレ
ット内部への基質の透過性と、処理水との分離性の点
で、2mmから数mmのものが適当である。このペレットに
包括固定化された微生物は、廃水処理を行いながらペレ
ット内部で増殖し、廃水処理能力を徐々に高めていく。Pellets can usually be prepared by mixing activated sludge or a concentrated liquid of microorganisms cultivated with a wastewater substance intended for treatment with a material liquid of a polymer hydrogel, and gelling the mixture to form granular pellets. . The size of the pellet is preferably 2 mm to several mm in terms of the permeability of the substrate into the pellet and the separability from the treated water. The microorganisms entrapped and immobilized in the pellets grow inside the pellets while performing the wastewater treatment, and gradually increase the wastewater treatment capacity.
微生物菌体数として、ペレット作製当初10８〜９/cm3
程度であったものが、1010〜11/cm3程度まで増殖する。
ペレット内部の微生物の増殖は、廃水中の基質が透過し
やすいペレットの表層部ほど速くなる傾向があり、特に
好気性微生物は溶存酸素を必要とするため、条件の良い
ペレット表層部に菌体の密集槽を形成するようになる。As the number of microbial cells, 10 8-9 / cm 3 at the time of pellet production
What was about 10 to 11 / cm 3 grows.
The growth of microorganisms inside the pellet tends to be faster in the surface layer of the pellet through which the substrate in the wastewater is more likely to permeate. Especially, since aerobic microorganisms require dissolved oxygen, the pellet surface layer under good conditions will contain bacterial cells. It forms a dense tank.
ところで、廃水処理槽内で、空気等の気体を用いてペ
レットを流動させる場合、１年以上、ペレットが破壊す
る現象はみられないが、ペレット同士の衝突等により表
面が徐々に磨耗したり、高分子材料の劣化がすすみ、強
度的に脆弱となり、ペレットが破壊しやすい状態とな
る。このため、ペレットが磨耗し、スクリーンによる処
理水との分離性が悪化した時点、あるいはペレット強度
が一定値以下に低下した時点で、ペレットを処理槽から
引き抜き、新規に作製したペレットを代わりに投入する
必要があった。By the way, when the pellets are made to flow using a gas such as air in the wastewater treatment tank, there is no phenomenon that the pellets are destroyed for one year or more, but the surface is gradually worn due to collision between the pellets, The deterioration of the polymer material progresses, the strength becomes fragile, and the pellet is easily broken. For this reason, when the pellets become worn and the separability from the treated water by the screen deteriorates, or when the pellet strength falls below a certain value, the pellets are pulled out from the treatment tank and the newly prepared pellets are added instead. Had to do.
この方法は、第１に、使用済みペレットの材料費、あ
るいは処分費が浪費されること、第２に、新規ペレット
の廃水処理能力が高まるまで処理水質が悪化するという
欠点があった。This method has the disadvantages that firstly, the material cost or disposal cost of the used pellets is wasted, and secondly, the treated water quality deteriorates until the wastewater treatment capacity of the new pellets increases.
本発明の目的は、前記従来技術の欠点に鑑みなされた
もので、長期間使用して劣化し強度が低下したペレット
を、高い強度及び微生物活性をもつペレットに再生する
固定化微生物ペレットの再生方法を提供するにある。The object of the present invention was made in view of the above-mentioned drawbacks of the prior art, and a method for regenerating an immobilized microbial pellet for regenerating a pellet having deteriorated strength after being used for a long time into a pellet having high strength and microbial activity. To provide.
請求項（１）の発明は、廃水処理槽から引き抜いた固
定化微生物ペレットに高分子材料を含浸または塗布する
ことを特徴とする。The invention of claim (1) is characterized in that the immobilized microbial pellets pulled out from the wastewater treatment tank are impregnated or coated with a polymer material.
請求項（２）の発明は、固定化微生物ペレットを粉砕
し、高分子材料と混合してペレットに成型することを特
徴とする。The invention of claim (2) is characterized in that the immobilized microbial pellets are crushed, mixed with a polymer material and molded into pellets.
ペレットは長期間使用し、表面が磨耗したり強度が低
下した場合でも、新規に作製したペレットよりも目的と
した廃水の基質に順応した活性の高い微生物が高濃度で
固定化されている。したがって、この微生物をペレット
の再生時にそのまま利用することにより、長期間使用し
て劣化し、強度が低下したペレットを高い強度と微生物
活性をもつペレットに再生できる。The pellets are used for a long period of time, and even when the surface is worn or the strength is reduced, highly active microorganisms that adapt to the target wastewater substrate are immobilized at a higher concentration than the newly prepared pellets. Therefore, by utilizing this microorganism as it is at the time of regenerating the pellet, it is possible to regenerate the pellet, which has been deteriorated due to long-term use and has reduced strength, into a pellet having high strength and microbial activity.
以下、図に示す実施例を用いて本発明の詳細を説明す
る。The present invention will be described in detail below with reference to the embodiments shown in the drawings.
第１図は本発明に係る固定化微生物ペレットの再生方
法の一実施例を説明する概略構成図である。廃水処理槽
（図示せず）から引き抜いたペレット１を、まず混合槽
２内に投入し、撹拌装置３を介してゆるやかに撹拌す
る。ここで、混合槽２内において材料液４をペレット１
に含浸させる。この含浸は、数分から数十分で行われ
る。FIG. 1 is a schematic configuration diagram for explaining an embodiment of a method for regenerating an immobilized microbial pellet according to the present invention. Pellets 1 drawn from a wastewater treatment tank (not shown) are first put into a mixing tank 2 and gently stirred via a stirring device 3. Here, the material liquid 4 is pelletized 1 in the mixing tank 2.
Impregnate. This impregnation is performed in a few minutes to a few tens of minutes.
次に、ペレット１をゲル化槽５に移し、ゲル化剤６に
よってペレット１に含まれた材料液４をゲル化させる。
この方法により、新規にペレットを作製する場合よりも
大幅に少ない材料で再生ペレット７を得ることができ
る。Next, the pellet 1 is transferred to the gelling tank 5, and the material liquid 4 contained in the pellet 1 is gelled by the gelling agent 6.
By this method, the regenerated pellet 7 can be obtained with much less material than in the case of newly producing a pellet.
第２図は、本発明方法の他の実施例を説明する概略構
成図である。廃水処理槽から引き抜いたペレット１は、
粉砕機８で粉砕された後、混合槽２内に導かれる。この
混合層２内で材料液貯槽９内から導入した材料液４と混
合される。FIG. 2 is a schematic block diagram for explaining another embodiment of the method of the present invention. Pellets 1 drawn from the wastewater treatment tank are
After being crushed by the crusher 8, it is introduced into the mixing tank 2. In this mixed layer 2, the material liquid 4 introduced from the material liquid storage tank 9 is mixed.
次に、ゲル化剤貯槽10内のゲル化剤６が添加されると
共に粒状に成型され、再生ペレット７を得ることができ
る。Next, the gelling agent 6 in the gelling agent storage tank 10 is added and molded into granules to obtain regenerated pellets 7.
本実施例の場合にも、新規ペレットを作製する場合よ
り少ない材料で、再生前のペレットより強度の高いもの
にすることができる。また、微生物についても、再生前
のペレットに固定化された活性の高い状態のものをその
まま利用することができる。Also in the case of the present embodiment, it is possible to make the strength higher than that of the pellets before the regeneration, with a smaller amount of material than in the case of producing new pellets. Also, as for the microorganisms, those having a high activity immobilized on pellets before regeneration can be used as they are.
なお、本発明で使用される材料液４は、ゲル化剤６と
の反応により高分子含水ゲルを形成するものであれば特
に限定されない。The material liquid 4 used in the present invention is not particularly limited as long as it forms a polymer hydrogel by reaction with the gelling agent 6.
以上説明したように本発明に係る固定化微生物ペレッ
トの再生方法によれば、廃水処理槽から引き抜いた固定
化微生物ペレットに、高分子材料を含浸または塗布する
か、あるいはペレットを粉砕し、高分子材料を混合し、
ペレットを作製するよう構成したことにより、長期間使
用して劣化し、強度が低下したペレットを高い強度と微
生物活性をもつペレットに再生することができるという
優れた効果を奏する。As described above, according to the method for regenerating an immobilized microbial pellet according to the present invention, the immobilized microbial pellet extracted from the wastewater treatment tank is impregnated with or coated with a polymer material, or the pellet is pulverized to obtain a polymer. Mix the ingredients,
Since it is configured to produce pellets, it has an excellent effect of being able to regenerate pellets which have deteriorated due to long-term use and have reduced strength into pellets having high strength and microbial activity.
第１図は本発明に係る固定化微生物ペレットの再生方法
の一実施例を説明する概略構成図、第２図は本発明に係
る固定化微生物ペレットの再生方法の他の実施例を説明
する概略構成図である。 １……ペレット、 ２……混合槽、 ４……材料液、 ５……ゲル化槽、 ６……ゲル化剤、 ７……再生ペレット、 ８……粉砕機、 ９……材料液貯槽、 10……ゲル化剤貯槽。FIG. 1 is a schematic configuration diagram for explaining an embodiment of a method for regenerating an immobilized microbial pellet according to the present invention, and FIG. 2 is a schematic diagram for explaining another embodiment of a method for regenerating an immobilized microbial pellet according to the present invention. It is a block diagram. 1 ... Pellet, 2 ... Mixing tank, 4 ... Material liquid, 5 ... Gelling tank, 6 ... Gelling agent, 7 ... Regeneration pellet, 8 ... Grinding machine, 9 ... Material liquid storage tank, 10 …… Gelling agent storage tank.
Claims (2)
レットに高分子材料を含浸または塗布することを特徴と
する固定化微生物ペレットの再生方法。1. A method for regenerating an immobilized microbial pellet, which comprises impregnating or coating a polymeric material on the immobilized microbial pellet drawn from a wastewater treatment tank.
レットを粉砕し、高分子材料と混合してペレットに成型
することを特徴とする固定化微生物ペレットの再生方
法。2. A method for regenerating an immobilized microbial pellet, which comprises crushing an immobilized microbial pellet drawn from a wastewater treatment tank, mixing the pellet with a polymer material, and molding the pellet into a pellet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303197A JPH0822438B2 (en) | 1990-11-08 | 1990-11-08 | Regeneration method of immobilized microbial pellets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303197A JPH0822438B2 (en) | 1990-11-08 | 1990-11-08 | Regeneration method of immobilized microbial pellets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04176386A JPH04176386A (en) | 1992-06-24 |
| JPH0822438B2 true JPH0822438B2 (en) | 1996-03-06 |
Family
ID=17918049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2303197A Expired - Fee Related JPH0822438B2 (en) | 1990-11-08 | 1990-11-08 | Regeneration method of immobilized microbial pellets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0822438B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100478115B1 (en) * | 2002-04-22 | 2005-03-24 | 이정열 | Development of granulformed water cleaner for resolving of sedimentied organic matters in the bottom. |
| JP4632025B2 (en) * | 2004-05-06 | 2011-02-16 | 株式会社日立プラントテクノロジー | Method for producing entrapped immobilization microorganism carrier, entrapping immobilization microorganism carrier, and wastewater treatment apparatus |
| JP5636236B2 (en) * | 2010-09-21 | 2014-12-03 | Ｄｏｗａテクノロジー株式会社 | Nitric acid-containing water treatment method and nitric acid-containing water treatment apparatus |
-
1990
- 1990-11-08 JP JP2303197A patent/JPH0822438B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04176386A (en) | 1992-06-24 |
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