JPH0490894A - Microorganismic carrier for treatment of waster and treatment of waste water - Google Patents
Microorganismic carrier for treatment of waster and treatment of waste waterInfo
- Publication number
- JPH0490894A JPH0490894A JP2205186A JP20518690A JPH0490894A JP H0490894 A JPH0490894 A JP H0490894A JP 2205186 A JP2205186 A JP 2205186A JP 20518690 A JP20518690 A JP 20518690A JP H0490894 A JPH0490894 A JP H0490894A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- water
- treated
- treatment
- tank
- 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.)
- Pending
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 17
- 239000003822 epoxy resin Substances 0.000 claims abstract description 14
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 14
- 230000000813 microbial effect Effects 0.000 claims description 13
- 238000004065 wastewater treatment Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- 244000005700 microbiome Species 0.000 abstract description 12
- 238000000926 separation method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000005243 fluidization Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 238000005352 clarification Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
- 239000000969 carrier Substances 0.000 description 10
- 229920001225 polyester resin Polymers 0.000 description 4
- 239000004645 polyester resin Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012050 conventional carrier Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 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)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、廃水を生物化学的に処理するのに用いる微生
物の保持増殖用の微生物担体と、粒状の微生物担体を流
動化させて処理する廃水処理方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a microbial carrier for retaining and propagating microorganisms used to biochemically treat wastewater, and a microbial carrier for fluidizing and treating granular microbial carriers. It relates to a wastewater treatment method.
従来、下水やし尿及び食品廃水等の有機物含有廃水を生
物化学的に処理する方法として、微生物担体く以下担体
という）を用い一徹生物を表面に保持増殖させて微生物
密度を高めることにより、処理効率を高めた方法が行な
われている。当該方法には、担体を処理槽内に充填固定
した固定床式、担体粒子を処理槽内で流動化させる流動
床式等の担体浸漬ｒ床法や処理槽内に積層した担体上へ
廃水を散水する散水ｒ床法、及び円板状の担体群を回転
させながら廃水と接触させる回転円板法等がある。従来
上記各種方法に用いられる担体としては、ポリエステル
や塩化ビニール等の合成樹脂、活性炭、セラミック及び
砂粒等の粒子、繊維チップ、板及び特定形状成形物等が
多く用いられている。Conventionally, as a method for biochemically treating wastewater containing organic matter such as sewage, human waste, and food wastewater, treatment efficiency has been improved by retaining and multiplying organisms on the surface using microbial carriers (hereinafter referred to as carriers) and increasing the density of microorganisms. A method is being used to increase the This method includes a fixed bed method in which the carrier is filled and fixed in the treatment tank, a carrier immersed bed method such as a fluidized bed method in which the carrier particles are fluidized in the treatment tank, and a method in which wastewater is poured onto the carriers stacked in the treatment tank. There is a sprinkling bed method in which water is sprinkled, a rotating disk method in which a group of disc-shaped carriers is brought into contact with wastewater while rotating, and the like. Conventionally, as carriers used in the various methods described above, synthetic resins such as polyester and vinyl chloride, activated carbon, particles such as ceramics and sand grains, fiber chips, plates, and molded products of specific shapes are often used.
上記従来用いられている担体に於ては、微生物増殖速度
が遅い、微生物保持力が弱く生物膜が剥離しやすい、機
械的強度が弱く微細化しやすい、及び水と大きな比重差
が有り流動化しにくい等の欠点を夫々が少なくとも一つ
は持っており、又上記担体を用いた処理方法に於ても、
微生物増殖速度が遅く定常運転までの期間が長い、微生
物密度が上らず処理効率が低く処理槽容量が大きくなつ
たり、微細化して流失や流通抵抗を高めたり、又は動力
費が嵩む等の欠点があった０本発明は上記従来の担体が
持つ欠点を少なくし、有機物含有廃水を安定して且つ効
率的に生物化学的処理できる担体と廃水処理方法を提供
することを課題とするものである。The conventionally used carriers mentioned above have a slow microbial growth rate, a weak microbial retention ability that makes biofilms easy to peel off, a weak mechanical strength that easily breaks down into fine particles, and a large difference in specific gravity from water, making it difficult to fluidize. Each of them has at least one drawback, and even in the treatment method using the above carrier,
Disadvantages include slow microbial growth rate, long period until steady operation, low microbial density, low treatment efficiency, increased processing tank capacity, miniaturization, which increases runoff and flow resistance, and increased power costs. It is an object of the present invention to provide a carrier and a wastewater treatment method that can reduce the drawbacks of the above-mentioned conventional carriers and can stably and efficiently biochemically treat organic matter-containing wastewater. .
上記事情に鑑みてなされた本発明の要旨は、廃水との接
触面がエポキシ樹脂から成ることを特徴とする廃水処理
用の微生物担体と、当該担体の粒子を用いたことを特徴
とする流動床式の廃水処理方法である。上記担体はエポ
キシ樹脂を粒状化したものが好ましいが、エポキシ樹脂
を成形又はポリエステルや塩化ビニール等の他の合成樹
脂やセラミック等で成形したものの表面にエポキシ樹脂
塗料を塗布したもの等でもよく、又その形状も粒状、板
状、棒状、繊維状及び特定形状成形物等適用される処理
方法に応じて好適のものを適宜用いることができる。尚
、エポキシ樹脂とは、１分子中に、エポキシ基を２個以
上もち、そのエポキシ基の開環反応により生成する熱硬
化性樹脂であり、物理的、化学的及び電気的物性等に優
れ、他の合成樹脂と比較し特異な優れた性質を有してお
り、塗料、電気部品、土木建築及び接着剤等の極めて広
い用途に用いられている。更に上記担体が適用される廃
水の処理方法としては、粒状担体を処理槽内で流動化さ
せる流動床式の廃水処理方法が好ましいが、固定床式浸
漬ｒ床法、散水ｒ床法及び回転円板法等の従来担体を用
いて有機物含有廃水を生物化学的に処理する方法であれ
ば適用できる。The gist of the present invention, which has been made in view of the above circumstances, is to provide a microbial carrier for wastewater treatment, characterized in that the surface in contact with wastewater is made of an epoxy resin, and a fluidized bed characterized in that particles of the carrier are used. This is a wastewater treatment method. The above-mentioned carrier is preferably a granulated epoxy resin, but it may also be a molded epoxy resin, or a molded material made of other synthetic resin such as polyester or vinyl chloride, or ceramic, etc., and then coated with an epoxy resin paint on the surface. The shape thereof may be appropriately selected depending on the processing method to be applied, such as granular, plate-like, rod-like, fibrous, or specific-shaped molded products. Epoxy resin is a thermosetting resin that has two or more epoxy groups in one molecule and is produced by a ring-opening reaction of the epoxy groups, and has excellent physical, chemical, and electrical properties. It has unique and excellent properties compared to other synthetic resins, and is used in an extremely wide range of applications such as paints, electrical parts, civil engineering and construction, and adhesives. Furthermore, as a wastewater treatment method to which the above-mentioned carrier is applied, a fluidized bed type wastewater treatment method in which the granular carrier is fluidized in a treatment tank is preferable, but a fixed bed type immersed bed method, a sprinkler bed method, and a rotating circle method are also preferred. Any method that biochemically treats organic matter-containing wastewater using a conventional carrier, such as the plate method, can be applied.
第１図は一実施例の好気性流動床処理装置の系統図であ
る。１は上部及び下部で連通して循環路を形成すべく垂
直方向中央部に仕切りを縦設した円筒状の処理槽であり
、当該槽１は上部に被処理水の供給管７と、仕切られた
一方の室の下方に空気吹込管９が接続されており、又他
方の室の上部に処理水排出管８を接続した固液分離部６
を付設し２ている。２は上記処理槽ｌ内に循環流動ずべ
く充填されるエポキシ樹脂製の粒状担体である。FIG. 1 is a system diagram of an example of an aerobic fluidized bed treatment apparatus. Reference numeral 1 denotes a cylindrical treatment tank in which a partition is installed vertically in the center in the vertical direction so that the upper and lower parts communicate with each other to form a circulation path. An air blowing pipe 9 is connected to the lower part of one of the chambers, and a solid-liquid separation section 6 is connected to the treated water discharge pipe 8 to the upper part of the other chamber.
2 are attached. Reference numeral 2 denotes a granular carrier made of epoxy resin that is filled in the processing tank 1 so as to circulate and flow.
当該担体２の形状は、球状、不定形粒状、円柱状等の粒
子であればよいが、製造の容易さや流動状態等から球状
が好ましい。又その粒径も０．１〜１ＩＩＩＩＩｌφが
良く、特に０，２〜０゜６ＩＩＩＩｌｌφが好ましい。The shape of the carrier 2 may be spherical, irregularly shaped particles, cylindrical particles, etc., but spherical is preferable from the viewpoint of ease of production, fluidity, etc. Also, the particle size is preferably 0.1 to 1IIIllφ, particularly preferably 0.2 to 0.6IIIllφ.
３は被処理水タンク、４は被処理水の供給ポンプ、５は
空気供給用のコンプレッサーである。上記構成の装置で
廃水を好気的生物化学的処理する方法について以下述べ
る。処理槽１に馴養用被処理水及び担体２を充填し、コ
ンプレッサー５により空気吹込管９から一定量の空気を
吹込み、エアリフト効果により被処理水を循環しながら
一定期間微生物を馴養する。馴養用被処理水タンク３か
ら供給ポンプ４で被処理水の一定量を供給管７を介して
処理槽１へ連続的に供給する。空気は引き続き連続的に
吹込まれるが、その流量は担体２の流動化及び被処理水
のＢＯＤ濃度を考慮して適宜設定される。処理水は固液
分離部６で担体２及び浮遊固形分を沈降分離し、処理水
排出管８から排出される。3 is a tank for water to be treated, 4 is a pump for supplying water to be treated, and 5 is a compressor for supplying air. A method for aerobically biochemically treating wastewater using the apparatus configured as described above will be described below. A treatment tank 1 is filled with water to be acclimated and a carrier 2, and a certain amount of air is blown in from an air blowing pipe 9 by a compressor 5 to acclimatize microorganisms for a certain period of time while circulating the water to be treated due to the air lift effect. A constant amount of water to be treated is continuously supplied from a water tank 3 for acclimatization to the treatment tank 1 via a supply pipe 7 by a supply pump 4. Air is continuously blown in, and its flow rate is appropriately set in consideration of the fluidization of the carrier 2 and the BOD concentration of the water to be treated. The treated water undergoes sedimentation separation of the carrier 2 and suspended solids in the solid-liquid separation section 6, and is discharged from the treated water discharge pipe 8.
排出された処理水は必要により更に清澄化処理され放流
される。上記の処理装置及び方法において流動担体を変
えて比較テストを行なった結果について以下詳述する。The discharged treated water is further clarified if necessary and then discharged. The results of a comparative test using different fluid carriers in the above processing apparatus and method will be described in detail below.
担体は第１表で示す３種類の担体を夫々充填率１２ｖＯ
１％とし、夫々１，８１投入した。又被処理水は第２表
で示した合成下水を約１００倍に希釈しＢＯＤ値を２０
０ｍｇ＃とじた人工廃水を１５１充液した。比較テスト
は吹込空気量と人工廃水のＢＯＤ濃度を一定とし、人工
廃水の供給量を調整し、ＢＯＤ容積負荷を変化させて処
理水中のＢＯＤ値、ＳＳ値を測定した。結果を第２図及
び第３図に夫々グラフで示す。第２図で比較すると、エ
ポキシ樹脂と活性炭では、殆ど同様な傾向を示しており
、ＢＯＤ容積負荷を変えても、処理水中のＢＯＤ値に殆
ど変化なく低い値で安定しているが活性炭ではＢＯＤ容
積負荷が高くなるに従って増加する傾向を示している。Three types of carriers shown in Table 1 were used at a loading rate of 12vO.
1%, and 1.81 were added respectively. In addition, the water to be treated is the synthetic sewage shown in Table 2, diluted approximately 100 times to have a BOD value of 20.
151 mL of artificial wastewater containing 0mg# was filled. In the comparative test, the amount of blown air and the BOD concentration of artificial wastewater were kept constant, the amount of artificial wastewater supplied was adjusted, and the BOD volume load was changed to measure the BOD value and SS value in the treated water. The results are shown graphically in FIGS. 2 and 3, respectively. When compared in Figure 2, epoxy resin and activated carbon show almost the same trends, and even if the BOD volume load is changed, the BOD value in the treated water remains stable at a low value with almost no change, but with activated carbon, the BOD value remains low. It shows a tendency to increase as the volumetric load becomes higher.
これは、エポキシ樹脂においては、微生物がＢＯＤ容積
負荷に追従して順調に増殖し、安定して生物化学的処理
が行なわれており、活性炭においては、ＢＯＤ容積負荷
に若干追従できていないことを示している。This means that in the case of epoxy resin, microorganisms follow the BOD volume load and multiply smoothly, and biochemical treatment is carried out stably, whereas in the case of activated carbon, it is slightly unable to follow the BOD volume load. It shows.
これに対し、ポリエステル樹脂では、ＢＯＤ容積負荷が
低い場合でもＢＯＤ値が若干高くなっており、ＢＯＤ容
積負荷が２ｋｇ／ｒｎ’・日以上になると急激に高くな
っている。これは、微生物が担体で順調に増殖せず、生
物化学的処理が良好に行なわれていないことを示してい
る。又第３図で比較すると、ポリエステル樹脂では、Ｂ
ＯＤ容積負荷の増加と共に処理水中のＳＳ値が減少して
おり、エポキシ樹脂と活性炭では、ＢＯＤ容積負荷の増
加と共に高くなっている。これは、ポリエステル樹脂で
は、微生物の増殖が殆ど行なわれておらず、微生物の絶
対量が少ないため、処理水中に浮遊する微生物が少ない
ことを示している。エポキシ樹脂と活性炭では、ＢＯＤ
容積負荷の増加と共に微生物が順調に増殖するため担体
保持量以上の微生物が増殖し、処理水中に浮遊すること
による。又夫々の担体の微生物付着状態を観察すると、
エポキシ樹脂は、担体を核として糸状生物が放射状に密
に繁殖し、その径が数倍にもなっていた。活性炭は、表
面に薄い生物膜を形成しており、又ポリエステル樹脂で
は生物付着が殆ど見られな力）つな。On the other hand, in the case of polyester resin, the BOD value is slightly high even when the BOD volume load is low, and increases rapidly when the BOD volume load is 2 kg/rn'·day or more. This indicates that the microorganisms do not grow properly on the carrier and that the biochemical treatment is not performed well. Also, when compared in Figure 3, in polyester resin, B
As the OD volume load increases, the SS value in the treated water decreases, and for epoxy resin and activated carbon, it increases as the BOD volume load increases. This indicates that in the polyester resin, microorganisms hardly proliferate and the absolute amount of microorganisms is small, so there are few microorganisms floating in the treated water. For epoxy resin and activated carbon, BOD
As the volume load increases, the microorganisms grow steadily, so the microorganisms grow in excess of the carrier capacity and become suspended in the treated water. Also, when observing the state of microbial adhesion on each carrier,
In the epoxy resin, filamentous organisms were growing densely in a radial manner using the carrier as a core, and the diameter had increased several times. Activated carbon forms a thin biofilm on its surface, and polyester resin shows almost no biofouling.
更に活性炭では、ＢＯＤ容積負荷を上唇デると、担体同
志が集まり、団塊粒を形成して流動性力（悪くなった。Furthermore, with activated carbon, when the BOD volume load was applied to the upper lip, the carriers gathered together to form nodules, resulting in poor flowability.
第１表；使用担体 ※１ 細孔表面積台まず。Table 1; Carrier used *1 Pore surface area first.
※２ 径１７μｍの繊維を束ねたもの。*2 A bundle of fibers with a diameter of 17 μm.
第２表；合成下水の組成
〔発明の効果〕
本発明の微生物担体及び廃水処理方法は下記効果を奏す
る。Table 2: Composition of synthetic sewage [Effects of the invention] The microbial carrier and wastewater treatment method of the present invention have the following effects.
イ） 微生物増殖、保持性能がよく、ＢＯＤ容積負荷が
高くても安定した処理効率が得られるため、処理槽を小
型化することができる。b) The microorganism growth and retention performance is good, and stable treatment efficiency can be obtained even with a high BOD volume load, so the treatment tank can be downsized.
口） 機械的強度が強く微細化して流失したり、流通抵
抗を高めることがなく、又比重も小さいため流動性が良
い。(Example) It has strong mechanical strength and does not become fine and will not be washed away or increase flow resistance, and has a low specific gravity, so it has good fluidity.
ハ） 団塊粒化しにくく流動が良好に行なわれるため安
定した処理が可能である。c) Stable processing is possible because it is difficult to form agglomerates and flows well.
二） 担体は合成樹脂であるため任意の形状に成形でき
、又塗料として用いれば従来の各種担体に塗布して、本
発明の担体とすることもでき、汎用性が極めて大きい。2) Since the carrier is a synthetic resin, it can be molded into any shape, and if used as a paint, it can be applied to various conventional carriers to form the carrier of the present invention, making it extremely versatile.
第１図は一実施例の好気性流動床処理装置の系統図、第
２図及び第３図は比較テストに於けるＢＯＤ容積負荷と
処理水中のＢＯＤ値、及びＳＳ値との関係を示すグラフ
である。
１；流動処理槽、２；粒状担体、３；被処理水タンク、
４；被処理水供給ポンプ、５；コンプレッサー、６：固
液分離部。
特許出願人；三菱化工機株式会社
第
図Figure 1 is a system diagram of an example of an aerobic fluidized bed treatment equipment, and Figures 2 and 3 are graphs showing the relationship between BOD volume load, BOD value in treated water, and SS value in a comparative test. It is. 1; Fluid treatment tank, 2; Granular carrier, 3; Water tank to be treated,
4: Water supply pump to be treated, 5: Compressor, 6: Solid-liquid separation section. Patent applicant: Mitsubishi Kakoki Co., Ltd.
Claims (1)
とする廃水処理用の微生物担体。２）エポキシ樹脂粒子
から成る微生物担体を用いたことを特徴とする流動床式
の廃水処理方法。1) A microbial carrier for wastewater treatment, characterized in that the surface in contact with wastewater is made of epoxy resin. 2) A fluidized bed wastewater treatment method characterized by using a microbial carrier made of epoxy resin particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2205186A JPH0490894A (en) | 1990-08-03 | 1990-08-03 | Microorganismic carrier for treatment of waster and treatment of waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2205186A JPH0490894A (en) | 1990-08-03 | 1990-08-03 | Microorganismic carrier for treatment of waster and treatment of waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0490894A true JPH0490894A (en) | 1992-03-24 |
Family
ID=16502837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2205186A Pending JPH0490894A (en) | 1990-08-03 | 1990-08-03 | Microorganismic carrier for treatment of waster and treatment of waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0490894A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2707183A1 (en) * | 1993-07-06 | 1995-01-13 | Dumez Lyonnaise Eaux | Process for setting in motion microorganism-carrying particles in a liquid to be treated by a biological route and plant for making use of the process |
| JPH07195094A (en) * | 1993-12-29 | 1995-08-01 | Hajime Hanada | Septic device |
| EP0738688A1 (en) * | 1995-04-21 | 1996-10-23 | Degremont | Apparatus for the biological treatment of liquids, specially waste water |
| FR2858814A1 (en) * | 2003-08-11 | 2005-02-18 | Amenagement Urbain & Rural | Plant for aerobic treatment of a liquid containing organic waste uses microorganisms immobilized on mobile carrier particles, and comprises a reactor with a bubbling air injector and a lateral de-gassing section |
-
1990
- 1990-08-03 JP JP2205186A patent/JPH0490894A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2707183A1 (en) * | 1993-07-06 | 1995-01-13 | Dumez Lyonnaise Eaux | Process for setting in motion microorganism-carrying particles in a liquid to be treated by a biological route and plant for making use of the process |
| JPH07195094A (en) * | 1993-12-29 | 1995-08-01 | Hajime Hanada | Septic device |
| EP0738688A1 (en) * | 1995-04-21 | 1996-10-23 | Degremont | Apparatus for the biological treatment of liquids, specially waste water |
| FR2733164A1 (en) * | 1995-04-21 | 1996-10-25 | Degremont | DEVICE FOR THE BIOLOGICAL TREATMENT OF LIQUID, ESPECIALLY WASTE WATER |
| US5698094A (en) * | 1995-04-21 | 1997-12-16 | Degremont | Device for biological treatment of liquid, especially sewage |
| FR2858814A1 (en) * | 2003-08-11 | 2005-02-18 | Amenagement Urbain & Rural | Plant for aerobic treatment of a liquid containing organic waste uses microorganisms immobilized on mobile carrier particles, and comprises a reactor with a bubbling air injector and a lateral de-gassing section |
| WO2005016834A3 (en) * | 2003-08-11 | 2005-04-14 | Amenagement Urbain & Rural | Installation for the aerobic treatment of a liquid, consisting in moving micro-organism-bearing particles and comprising decantation and degassing |
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