JPS6320097A - Water treatment - Google Patents
Water treatmentInfo
- Publication number
- JPS6320097A JPS6320097A JP61164178A JP16417886A JPS6320097A JP S6320097 A JPS6320097 A JP S6320097A JP 61164178 A JP61164178 A JP 61164178A JP 16417886 A JP16417886 A JP 16417886A JP S6320097 A JPS6320097 A JP S6320097A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- water
- specific gravity
- treatment
- microorganism
- 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.)
- Granted
Links
- 238000011282 treatment Methods 0.000 title claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000002245 particle Substances 0.000 claims abstract description 85
- 230000005484 gravity Effects 0.000 claims abstract description 49
- 244000005700 microbiome Species 0.000 claims abstract description 13
- 238000010008 shearing Methods 0.000 claims abstract description 3
- 230000001172 regenerating effect Effects 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 28
- 230000008929 regeneration Effects 0.000 claims description 8
- 238000011069 regeneration method Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 description 9
- 239000008187 granular material Substances 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 4
- 239000011162 core material Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 241001197153 Remaster Species 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension 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
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、水溶液を生物学的に処理する水処理法、特に
廃水処理に好適な水処理法に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a water treatment method for biologically treating an aqueous solution, and particularly to a water treatment method suitable for wastewater treatment.
「従来技術とその問題点」
生物学的な廃水処理法の一つに、微生物を粒子に担持さ
せ、この粒子（以下、微生物担持粒子と称する）を処理
槽内で流動させて廃水処理を行う流動＠濁型の処理法が
ある。"Prior art and its problems" One of the biological wastewater treatment methods is to carry microorganisms on particles and flow these particles (hereinafter referred to as microorganism-carrying particles) in a treatment tank to treat wastewater. There is a fluid @turbid type treatment method.
第２図は、流動懸詞型の処理法を実施する装置の一例を
示すもので、図中符号＋１は外筒である。FIG. 2 shows an example of an apparatus for carrying out a fluid suspension type processing method, and the reference numeral +1 in the figure indicates an outer cylinder.
この外筒１１は有底円筒状のらので、その内部には同軸
的に内筒１２が設けられている。この内筒１２は上端お
よび下端が開口した筒状の６のである。外筒１１の下部
には、内筒１２の下方に位置する曝気部材１３が設けら
れており、ブロア１４で加圧された気体が曝気されるよ
うになっている。This outer cylinder 11 is a cylindrical shape with a bottom, and an inner cylinder 12 is provided coaxially inside the outer cylinder 11. This inner cylinder 12 has a cylindrical shape with open upper and lower ends. An aeration member 13 located below the inner cylinder 12 is provided at the lower part of the outer cylinder 11, and the gas pressurized by the blower 14 is aerated.
そして、この装置内の被処理水は、図中矢印で示すよう
に、流動されている。The water to be treated in this apparatus is flowing as shown by the arrow in the figure.
従来、流石懸濁型の廃水処理法には、被処理水重い微生
物担持粒子か、あるいは被処理水より軽い微生物担持粒
子のいずれか一方のみが用いられていた。Conventionally, in suspension-type wastewater treatment methods, only either particles carrying microorganisms that are heavier than the water to be treated or particles carrying microorganisms that are lighter than the water to be treated have been used.
比重の大きな粒子を用いて廃水を処理する場合には、粒
子を主に内筒１２内で上昇流によって浮遊させ、外百部
では液流とと乙に下降さ什るようにしてい１こ。When treating wastewater using particles with a large specific gravity, the particles are mainly suspended in the inner cylinder 12 by an upward flow, and in the outer part, they are caused to descend with the liquid flow.
また、比重の小さな粒子を用いる場合には、外筒１１と
内筒１２の間に粒子を投入し、下降流によって粒子の浮
上を阻止して、粒子を内外筒間の被処理水中に懸濁する
ようにしていた。In addition, when using particles with a small specific gravity, the particles are placed between the outer cylinder 11 and the inner cylinder 12, and the downward flow prevents the particles from floating, thereby suspending the particles in the water to be treated between the inner and outer cylinders. I was trying to do that.
ところか、上記従来の廃水処理法では、微生物担持粒子
を被処理水中に懸濁するために被処理水を高速で流動さ
せねばならず、装置の運転にコストが嵩む問題があった
。また、このような従来の廃水処理法では、粒子を多量
に投入すると粒子の一部が沈降し流動懸濁しなかったり
、さらには全く〆を動じなかったり、あるいは完全に浮
上してしまい廃水との接触が低下したりするため、ｆ了
効に懸濁できる粒子の舟が制限され、その結果、廃水処
理の効率を向上できない不満があっｆ二。特に、従来使
用に供することができた比重が１より大きい粒子は、砂
、活性炭、アンスラザイトの如く比重２以上のものが多
く、水の比重ｌよりもかなり重いため、循環流動エネル
ギーが多大となる欠点があった。However, in the conventional wastewater treatment method described above, the water to be treated must be flowed at high speed in order to suspend the microorganism-carrying particles in the water to be treated, which poses a problem in that the cost of operating the apparatus increases. In addition, in such conventional wastewater treatment methods, when a large amount of particles are introduced, some of the particles settle and are not fluidized or suspended, or they do not move at all, or they completely float to the surface and cannot be mixed with the wastewater. Due to reduced contact, the number of particles that can be suspended in the process is limited, and as a result, there is a dissatisfaction that the efficiency of wastewater treatment cannot be improved. In particular, many of the particles with a specific gravity greater than 1 that could be used in the past have a specific gravity of 2 or more, such as sand, activated carbon, and anthrazite, and are much heavier than the specific gravity of water, so they require a large amount of circulating flow energy. There was a drawback.
本発明者≦は、このような問題に対処するｆこめ、水と
かなり近い見掛は比重（水が含浸された状態での見掛は
比重）に調整でき、かつ微生物担持能力の優れた浮遊性
造粒物を開発した。この浮遊性造粒物は、被処理溶液上
りら見掛は比重が小さい芯材と、被処理溶液よりも比重
が大きい親液性多孔質粉体とからなり、芯材に多孔質粉
体からなる被覆が施されたもの、および芯材と多孔質粉
体が混合されてなるものである。この浮遊性造粒物は、
水とほぼ等しい比重に調整でき、被処理水中に容易に懸
測し得るので、上記問題に対処できる。In order to deal with such problems, the present inventors have developed a floating material that can be adjusted to have a specific gravity that is quite close to that of water (the apparent specific gravity when impregnated with water) and has an excellent ability to support microorganisms. Developed granulated material. This floating granule consists of a core material with a small apparent specific gravity and a lyophilic porous powder with a higher specific gravity than the solution to be treated. One is coated with a core material and the other is a mixture of a core material and porous powder. This floating granule is
Since the specific gravity can be adjusted to approximately the same as that of water and can be easily suspended in the water to be treated, the above problem can be solved.
ところが、このような浮遊性造粒物を実際に製造する場
合、その比重を厳密に管理すると生産の歩留りが悪化す
る問題がある。そこで、造粒物の比重の管理を緩めると
、造粒物の重さのバラツキが大きくなり、全部の微生物
担持粒子を被処理水中に十分懸詞させて廃水処理に供す
るには、廃水処理装置を微妙に制御しなければならず、
装置の運転が難しくなる問題があった。However, when such floating granules are actually manufactured, there is a problem that the production yield deteriorates if the specific gravity is strictly controlled. Therefore, if the control of the specific gravity of the granules is loosened, the weight of the granules will vary greatly, and in order to fully contain all the microorganism-carrying particles in the water to be treated and use it for wastewater treatment, it is necessary to must be delicately controlled,
There was a problem that made it difficult to operate the device.
「問題点を解決するための手段」
そこで、本発明の水処理法では、処理槽として、水が＼
浸された状態で約ｌ〜１．３の見掛は比重を打する微生
物担持粒子か投入される処理槽と、約０７〜Ｉの見掛は
比重を有する微生物担持粒子が投入される処理槽を設け
て水処理すると共に、これら処理槽で使用されて後述す
る理由により流動懸濁し得ない状態となった微生物担持
粒子を６槽から引き抜き、あるいは一定量を６槽から定
期的に引き抜き、この引き抜かれた微生物担持粒子に剪
断力を加えて肥大化した生物膜を剥離して粒子を再生し
、この再生された微生物担持粒子を比重分離して、上記
２種類の処理槽のいずれかに返送することによって、上
記問題点の解決を図った。"Means for Solving Problems" Therefore, in the water treatment method of the present invention, water is
A treatment tank into which microorganism-supported particles having an apparent specific gravity of about 1 to 1.3 in a immersed state is introduced, and a processing tank into which microorganism-supported particles having an apparent specific gravity of about 07 to I are introduced. At the same time, the microorganism-carrying particles that have been used in these treatment tanks and have become unable to be fluidized and suspended due to the reasons described below are extracted from the 6 tanks, or a certain amount is periodically extracted from the 6 tanks. A shearing force is applied to the extracted microorganism-supported particles to peel off the enlarged biofilm and the particles are regenerated, and the regenerated microorganism-supported particles are separated by specific gravity and returned to one of the two types of treatment tanks mentioned above. By doing so, we attempted to solve the above problems.
「実施例ｊ
以下、図面を参照して本発明の水処理法を詳しく説明す
る。"Example J" Hereinafter, the water treatment method of the present invention will be explained in detail with reference to the drawings.
第１図は、本発明の水処理法を実施するのに好適な処理
装置の概略構成を示すもので、図中符号ｌ、２は処理槽
、符号３は再生装置、符号４は分離装置である。処理槽
１．２のうち一方の処理？、ｆｆｌは、水が含浸された
状態で約１−１．３の見掛は比重を有する微生物担持粒
子が投入される槽である。また、他方の処理槽２は、水
が含浸された状態で約１〜０７の見掛は比重を有する微
生物担持粒子が投入される槽である。これら処理槽１゜
２には、同一構造のらのをｆｌｌ用できるが、一般的に
は構造の異なったものか用いられる。FIG. 1 shows a schematic configuration of a treatment device suitable for carrying out the water treatment method of the present invention. In the figure, symbols l and 2 are treatment tanks, symbol 3 is a regeneration device, and symbol 4 is a separation device. be. Treatment of one of treatment tanks 1 and 2? , ffl is a tank into which microorganism-supported particles having an apparent specific gravity of about 1-1.3 are charged in a water-impregnated state. The other treatment tank 2 is a tank into which microorganism-carrying particles impregnated with water and having an apparent specific gravity of about 1 to 0.07 are charged. These treatment tanks 1 and 2 can all have the same structure, but generally, tanks with different structures are used.
上記、再生装置３は、微生物担持粒子を板体に衝突さ仕
たり、水エジエクタや機械攪拌で掻き回すことによって
、粒子表面に成長した生物膜を剥離するものである。ま
た、上記分離装置４は、比重によって粒子を分離する装
置である。これら再主装置３および分離装置４は、独立
して設けられても、一体に設けられても良い。The above-mentioned regeneration device 3 peels off the biological film that has grown on the particle surface by colliding the microorganism-carrying particles with a plate or stirring them using a water ejector or mechanical agitation. Further, the separation device 4 is a device that separates particles based on specific gravity. These remaster device 3 and separation device 4 may be provided independently or may be provided integrally.
次に、上記処理装置によって実施される本発明の水処理
法について説明する。Next, the water treatment method of the present invention carried out by the above-mentioned treatment apparatus will be explained.
まず、本発明の水処理法には、水が含浸されｆ二状態で
約１．３〜０．７の見掛は比重を有する微生物担持粒子
が用いられる。この微生物担持粒子は、まず分離装置４
に投入されろ。この分離装置４には、比重が約１である
水などが収容されており、投入された粒子のうち比重ｌ
よりも大のものは沈降し、小のものは浮上して互いに分
離される。そして、沈降した粒子は分離装置４の下部か
ら引き抜かれて処理槽ｌに送られ、浮上した粒子は上部
から引き抜かれて処理槽２に送られる。各階１゜２に送
られた粒子は、それぞれ目的とする処理に供される（水
処理工程）。ここで見掛は比重ｌとは、厳密に管理する
必要はなく、ある範囲の比重の粒子はいずれの処理槽１
．２に投入されても良い。First, the water treatment method of the present invention uses microorganism-supported particles impregnated with water and having an apparent specific gravity of about 1.3 to 0.7 in the f2 state. These microorganism-carrying particles are first separated into a separation device 4
be put into it. This separator 4 contains water and the like having a specific gravity of approximately 1, and the specific gravity of the introduced particles is 1.
Larger particles sink and smaller particles float to the surface and are separated from each other. Then, the settled particles are pulled out from the lower part of the separator 4 and sent to the treatment tank 1, and the floating particles are pulled out from the upper part and sent to the treatment tank 2. The particles sent to each floor 1°2 are subjected to their respective intended treatments (water treatment process). Here, the apparent specific gravity l does not need to be strictly controlled, and particles with a specific gravity within a certain range can be used in any treatment tank 1.
．． It may be added to 2.
各処理槽１．２で処理に供された粒子は、その表面に成
長した生物膜（比重１．０５程度）や、生物膜内に取り
込まれたＣＯ２やＶ、などの生成ガスなどによって、そ
の比重が徐々に初期のものと異なってくる。このように
比重か変化して、各階１．２で流動懸濁し難くなった粒
子は、槽１，２の上部に浮上しあるいは下部に沈降する
。このように浮上・沈降した微生物担持粒子は、間欠的
あるいは連続的に槽１．２から引き抜かれて、再生装置
３に送られる。The particles subjected to treatment in each treatment tank 1.2 are affected by biofilms (specific gravity of about 1.05) that have grown on their surfaces and generated gases such as CO2 and V taken into the biofilms. The specific gravity gradually differs from the initial one. As the specific gravity changes in this way, the particles that become difficult to flow and suspend at each floor 1.2 float to the top of the tanks 1 and 2 or settle to the bottom. The microorganism-carrying particles floated and settled in this manner are intermittently or continuously extracted from the tank 1.2 and sent to the regenerator 3.
再生装置３では、微生物担持粒子を吸体に衝突させたり
、水エジェクタや機械攪拌で掻き回すことによって剪断
力を加え、肥大化した生物膜を剥離して、粒子を再生す
る（再生工程）。In the regeneration device 3, the microorganism-carrying particles are collided with a suction body or agitated using a water ejector or mechanical agitation to apply shear force, peel off the enlarged biofilm, and regenerate the particles (regeneration step).
こうして再生された微生物担持粒子は、再び分離装置４
で比重分離されて、上記２種類の処理槽１．２のいずれ
かに返送される（分離返送工程）。The microorganism-carrying particles thus regenerated are returned to the separation device 4
The water is separated by specific gravity and returned to either of the two types of treatment tanks 1.2 (separation and return process).
また、再生時に剥離された生物膜は、余剰汚泥として再
生装置３等から引き抜かれて適宜処理される。Furthermore, the biofilm peeled off during regeneration is extracted from the regeneration device 3 or the like as surplus sludge and treated as appropriate.
「作用」
このような水処理法によれば、水よりも若干大きな比重
を有する粒子から若干小さな比重を有する粒子までが混
在する微生物担持粒子を用いて水処理を行ってら、各粒
子は常に流動！！濁し易い運転条件の処理槽１．２に導
入されて処理に供されることとなる。"Effect" According to this water treatment method, when water treatment is performed using microorganism-supported particles that contain a mixture of particles with a specific gravity slightly larger than that of water and particles with a specific gravity slightly smaller than that of water, each particle is constantly in a state of fluidity. ! ! It will be introduced into the treatment tank 1.2, which has operating conditions that tend to become cloudy, and will be subjected to treatment.
従って、本発明の水処理法によれば、各処理槽１．２に
は性向の揃った粒子が供給されるので、各１１５ｉ １
、２に供給された粒子と被処理水とが十分懸濁し得る
運転条件を容易に決定できることとなる。Therefore, according to the water treatment method of the present invention, particles with uniform propensities are supplied to each treatment tank 1.2, so that each 115i 1.
, 2 and the water to be treated can be easily determined.
なお、本発明の水処理法は、好気性の処理法、嫌気性の
処理法のいずれでら実施することができる。その場合、
一方の処理槽で嫌気性処理を行い、他方の処理槽で好気
性処理を行うことらできる。Note that the water treatment method of the present invention can be carried out by either an aerobic treatment method or an anaerobic treatment method. In that case,
Anaerobic treatment can be performed in one treatment tank and aerobic treatment can be performed in the other treatment tank.
また、本発明の水処理法によれば、廃水の有機成分の好
気或は嫌気除去、硝化、脱窒などを行えることは勿論で
ある。Furthermore, according to the water treatment method of the present invention, it goes without saying that aerobic or anaerobic removal of organic components of wastewater, nitrification, denitrification, etc. can be performed.
さらに、本発明の水処理法は上記実施例に限られるもの
ではなく、例えば各階からの微生物担持粒子の引き抜き
は、一定量を定期的に行うようにしても良い。Further, the water treatment method of the present invention is not limited to the above embodiments; for example, a fixed amount of microorganism-carrying particles may be periodically extracted from each floor.
「発明の効果」
以上説明したように、本発明の水処理法は、水とかなり
近似する重さを有する微生物担持粒子を用い、水より大
きな比重を有する微生物担持粒子を投入する処理槽と、
水より小さな比重を有する微生物担持粒子を投入する処
理槽を設けて水処理すると共に、これら処理槽で使用さ
れて比重が変わり流動し得なくなった粒子を各階から引
き抜き、この引き抜かれた微生物担持粒子に剪断力を加
えて成長した生物膜を剥離、再生し、この再生された微
生物担持粒子を比重分離して、上記２種類の処理槽のい
ずれかに返送する処理法なので、少ないエネルギーで微
生物を流動ＭＥさせることかできる。よって、この水処
理法によれば、水処理を経済的に行うことができると共
に、多量の微生物担持粒子を流動懸濁せしめることがで
きるので、単位体積当たりに廃水処理効率を高め廃水処
理装置の小形化を実現できろ。"Effects of the Invention" As explained above, the water treatment method of the present invention uses microorganism-supported particles having a weight fairly similar to that of water, and includes a treatment tank into which microorganism-supported particles having a specific gravity larger than that of water are introduced;
Water is treated by providing a treatment tank into which microorganism-carrying particles having a specific gravity smaller than that of water are introduced, and the particles that have been used in these treatment tanks and whose specific gravity has changed and are no longer able to flow are pulled out from each floor, and the extracted microorganism-carrying particles are This treatment method applies shear force to peel off and regenerate the grown biofilm, and the regenerated microorganism-supporting particles are separated by specific gravity and returned to either of the two types of treatment tanks mentioned above, so it is possible to remove microorganisms with less energy. It is possible to create a fluid ME. Therefore, according to this water treatment method, water treatment can be carried out economically, and a large amount of microorganism-carrying particles can be fluidized and suspended, which increases the wastewater treatment efficiency per unit volume and improves the efficiency of wastewater treatment equipment. Realize miniaturization.
また、本発明の水処理法では、各処理槽には性向の整っ
た粒子が供給されるので、被処理水と微生物担持粒子と
を十分！驕濁する」転条件を容易に決定でき、よって処
理装置の運転が容易となる。In addition, in the water treatment method of the present invention, particles with uniform properties are supplied to each treatment tank, so that the water to be treated and the microorganism-supporting particles are sufficiently supplied! It is possible to easily determine the conditions under which "transferring" occurs, thereby facilitating the operation of the processing equipment.
また、本発明の水処理、去によれば、見掛は比重（水が
含浸された状態での見掛は比重）か１前後のらのが混在
する微生物担持粒子を水処理に用いることができること
となるのて、微生物担持粒子を製造する際、その比重を
厳密に管理する必要がなくなり、微生物担持粒子の生産
の歩留りを向上することができる。Furthermore, according to the water treatment method of the present invention, it is possible to use microorganism-supported particles in water treatment in which particles with an apparent specific gravity (in a state impregnated with water, the apparent specific gravity) are mixed. As a result, there is no need to strictly control the specific gravity when producing microorganism-supporting particles, and the production yield of microorganism-supporting particles can be improved.
第１図は本発明の水処理法の一例を実施するのに好適な
処理装置を示す概略構成図、第２図は従来の水処理法で
使用されていた処理装置の一例を示す断面図である。
！、２・・・処理槽、３・・・再生装置、４・・・分離
装置。FIG. 1 is a schematic configuration diagram showing a treatment device suitable for carrying out an example of the water treatment method of the present invention, and FIG. 2 is a sectional view showing an example of a treatment device used in a conventional water treatment method. be. ! , 2... Processing tank, 3... Regeneration device, 4... Separation device.
Claims (1)
、これを被処理水と共に流動懸濁させて水溶液を処理す
る水処理法において、 処理槽を２種類設け、一方の処理槽に水が含浸された状
態で約１〜１．３の見掛け比重を有する微生物担持粒子
を投入し、他方の処理槽に水が含浸された状態で約０．
７〜１の見掛け比重を有する微生物担持粒子を投入して
被処理水の処理を行う水処理工程と、 これら処理槽から微生物担持粒子を引き抜き、この引き
抜かれた微生物担持粒子に剪断力を加え肥大化した生物
膜を剥離して粒子を再生する再生工程と、 再生された微生物担持粒子を比重分離して、上記処理槽
に返送する分離工程とからなることを特徴とする水処理
法。[Scope of Claims] In a water treatment method in which microorganism-carrying particles carrying microorganisms are put into a treatment tank and are fluidized and suspended together with the water to be treated to treat an aqueous solution, two types of treatment tanks are provided, one of which is Microorganism-supporting particles having an apparent specific gravity of about 1 to 1.3 are charged into one treatment tank with water impregnated therein, and microorganism-supporting particles having an apparent specific gravity of about 0.00000000000000000000000000000000000000 are charged into the other treatment tank with water impregnated with water.
A water treatment process in which microorganism-carrying particles having an apparent specific gravity of 7 to 1 are input to treat water to be treated, and microorganism-carrying particles are extracted from these treatment tanks, and shearing force is applied to the drawn microorganism-carrying particles to enlarge them. 1. A water treatment method comprising: a regeneration step of peeling off the biofilm and regenerating the particles; and a separation step of separating the regenerated microorganism-carrying particles by specific gravity and returning them to the treatment tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61164178A JPH0729105B2 (en) | 1986-07-12 | 1986-07-12 | Water treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61164178A JPH0729105B2 (en) | 1986-07-12 | 1986-07-12 | Water treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6320097A true JPS6320097A (en) | 1988-01-27 |
| JPH0729105B2 JPH0729105B2 (en) | 1995-04-05 |
Family
ID=15788197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61164178A Expired - Lifetime JPH0729105B2 (en) | 1986-07-12 | 1986-07-12 | Water treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0729105B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7715280B2 (en) | 2002-09-19 | 2010-05-11 | Citizen Holdings Co., Ltd. | Electronic clock |
| JP2012532747A (en) * | 2009-07-08 | 2012-12-20 | サウジ アラビアン オイル カンパニー | Low concentration wastewater treatment system and process |
| JP2012532748A (en) * | 2009-07-08 | 2012-12-20 | サウジ アラビアン オイル カンパニー | Wastewater treatment system and process including irradiation of primary solids |
-
1986
- 1986-07-12 JP JP61164178A patent/JPH0729105B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7715280B2 (en) | 2002-09-19 | 2010-05-11 | Citizen Holdings Co., Ltd. | Electronic clock |
| JP2012532747A (en) * | 2009-07-08 | 2012-12-20 | サウジ アラビアン オイル カンパニー | Low concentration wastewater treatment system and process |
| JP2012532748A (en) * | 2009-07-08 | 2012-12-20 | サウジ アラビアン オイル カンパニー | Wastewater treatment system and process including irradiation of primary solids |
| JP2014240073A (en) * | 2009-07-08 | 2014-12-25 | サウジ アラビアン オイル カンパニー | Wastewater treatment system and process including irradiation of primary solid |
| US9073764B2 (en) | 2009-07-08 | 2015-07-07 | Saudi Arabian Oil Company | Low concentration wastewater treatment system and process |
| US9290399B2 (en) | 2009-07-08 | 2016-03-22 | Saudi Arabian Oil Company | Wastewater treatment process including irradiation of primary solids |
| US9340441B2 (en) | 2009-07-08 | 2016-05-17 | Saudi Arabian Oil Company | Wastewater treatment system including irradiation of primary solids |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0729105B2 (en) | 1995-04-05 |
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