JPH03232590A - Treatment of sewage - Google Patents
Treatment of sewageInfo
- Publication number
- JPH03232590A JPH03232590A JP2028180A JP2818090A JPH03232590A JP H03232590 A JPH03232590 A JP H03232590A JP 2028180 A JP2028180 A JP 2028180A JP 2818090 A JP2818090 A JP 2818090A JP H03232590 A JPH03232590 A JP H03232590A
- Authority
- JP
- Japan
- Prior art keywords
- filter bed
- treated water
- anaerobic
- sewage
- aerobic
- 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
- 239000010865 sewage Substances 0.000 title claims abstract description 27
- 238000011282 treatment Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000010802 sludge Substances 0.000 claims abstract description 37
- 238000005273 aeration Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 52
- 239000002351 wastewater Substances 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 16
- 238000004062 sedimentation Methods 0.000 claims description 15
- 244000005700 microbiome Species 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 17
- 238000012856 packing Methods 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003830 anthracite Substances 0.000 abstract description 2
- 239000004576 sand Substances 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 17
- 241000894006 Bacteria Species 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 230000001546 nitrifying effect Effects 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、下水、し尿、工場廃水等の有機性汚水、特に
小規模な下水等の有機性の汚水の浄化処理に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the purification treatment of organic wastewater such as sewage, human waste, and industrial wastewater, particularly small-scale organic wastewater such as sewage.
従来、汚水の生物学的処理は浮遊処理、固定処理等の手
段を嫌気的、好気的、もしくはこれら両者の組合せにて
適用することにより実施されてきている。Conventionally, biological treatment of wastewater has been carried out by applying means such as floating treatment and fixed treatment anaerobically, aerobically, or a combination of both.
特に、嫌気性ろ床及び好気性ろ床を組み合わせた汚水処
理は、例えば、嫌気性処理→好気性処理→好気性ろ床の
汚泥の嫌気性ろ床への返送・分解というプロセスを用い
ることができるので嫌気性ろ床又は好気性ろ床単独処理
に比べ発生汚泥量を低減することができて有利である他
、多角的な処理が実施できるのでその応用範囲も極めて
広いという利点もある。In particular, wastewater treatment that combines an anaerobic filter bed and an aerobic filter bed can use, for example, the process of anaerobic treatment → aerobic treatment → return and decomposition of sludge from the aerobic filter bed to the anaerobic filter bed. Therefore, it is advantageous in that the amount of sludge generated can be reduced compared to treatment using only an anaerobic filter bed or an aerobic filter bed, and it also has the advantage that the range of application is extremely wide because multifaceted treatments can be carried out.
従来の嫌気性ろ床と好気性ろ床との組合せによる生物学
的処理の内、特に脱窒素処理を包含する生物学的処理は
、次のような問題点が存在する。Among conventional biological treatments using a combination of an anaerobic filter bed and an aerobic filter bed, biological treatments including denitrification treatment in particular have the following problems.
■ 小規模な下水の場合、流量変動や濃度変動が太きく
ＢＯＤ物質に対し窒素濃度が高く脱窒素に利用できる
ＢＯＤが不足し、脱窒素が不充分となるため負荷を高く
設定できない。処理効率を高めるためにはＢＯＤ源の添
加が必要となる。■ In the case of small-scale sewage, there are large fluctuations in flow rate and concentration.The nitrogen concentration is high relative to BOD substances, and there is a lack of BOD that can be used for denitrification, making denitrification insufficient, so it is not possible to set a high load. Addition of a BOD source is necessary to increase processing efficiency.
■ 好気性ろ床では硝化菌の増殖速度がＢＯＤ酸化菌に
比べるとはるかに遅いため滞留時間をある限界より短く
したりＢＯＤ負荷を高くした場合、硝化菌の洗い出しが
生じ硝化不能となる。■ In an aerobic filter bed, the growth rate of nitrifying bacteria is much slower than that of BOD oxidizing bacteria, so if the residence time is shortened below a certain limit or the BOD load is increased, the nitrifying bacteria will be washed out and nitrification will become impossible.
従来の技術は、負荷変動に弱く維持管理が難しくそれら
を補うため施設の規模をかなり大きくする必要がある。Conventional technology is susceptible to load fluctuations and is difficult to maintain and manage, requiring the facility to be considerably larger in size to compensate for this.
本発明は、上記従来技術の問題を解決することを目的と
したものであり、嫌気性ろ床（脱窒素）および好気性ろ
床（硝化）の処理効率を高めると共に負荷変動に強い安
定した汚水の処理方法を提供することにある。The present invention aims to solve the problems of the prior art described above, and aims to improve the processing efficiency of anaerobic filter beds (denitrogenization) and aerobic filter beds (nitrification), and to produce stable wastewater that is resistant to load fluctuations. The objective is to provide a processing method for
本発明は、上部に嫌気性微生物を有する充填材が充填さ
れた充填材層とその下部に汚泥を保持する沈澱部を有す
る構造の嫌気性ろ床工程と、好気性微生物を付着させる
充填材が充填された接触曝気工程と、好気性微生物を付
着させる充填材が充填された好気性ろ床工程とからなり
、汚水を前記嫌気性ろ床工程の沈澱部あるいは沈澱部な
らびに充填材層と沈澱部との間に流入させて少なくとも
生物学的脱窒素処理したのち、該生物学的脱窒素処理さ
れた処理水を前記接触曝気工程にて少なくともＢＯＤ除
去し、次に該ＢＯＤ除去された処理水を前記好気性ろ床
工程にて生物学的硝化処理し、かつ該生物学的硝化処理
された処理水の一部を前記嫌気性ろ床工程に循環するこ
とを特徴とする汚水の処理方法であり、また、嫌気性ろ
床下部に設けた沈澱部に汚泥層攪拌機を設け、汚水を該
沈澱部に流入させ、汚水と汚泥の接触を充分に行ったの
ち、前記嫌気性微生物を付着させる充填材層を通すこと
を特徴とする前記方法記載の汚水の処理方法であり、こ
れにより上記課題を解決することができる。The present invention provides an anaerobic filter bed process having a structure including a filler layer filled with a filler having anaerobic microorganisms in the upper part and a sedimentation part for holding sludge in the lower part, and a filler layer to which aerobic microorganisms are attached. It consists of a filled contact aeration step and an aerobic filter bed step filled with a filler to which aerobic microorganisms are attached, and the wastewater is transferred to the sedimentation section of the anaerobic filter bed step or the sedimentation section, the packing material layer, and the sedimentation section. After at least biological denitrification treatment by flowing the water between the biologically denitrified and biologically denitrified treated water, at least BOD is removed in the contact aeration step, and then the BOD-removed treated water is A method for treating wastewater, characterized in that the wastewater is subjected to biological nitrification treatment in the aerobic filter bed step, and a part of the treated water subjected to the biological nitrification treatment is circulated to the anaerobic filter bed step. In addition, a sludge layer agitator is provided in the settling section provided at the bottom of the anaerobic filter bed, and the sewage is allowed to flow into the settling section, and after sufficient contact between the sewage and the sludge, a filler material to which the anaerobic microorganisms are attached is provided. This is a method for treating wastewater as described in the above method, which is characterized by passing the wastewater through a layer, and thereby the above-mentioned problems can be solved.
本発明の第１の特徴は、特に、嫌気性ろ床工程にて生物
学的脱窒素処理された処理水を好気性ろ床工程流入前に
接触曝気工程（接触酸化）でＢＯＤを除去し、好気性ろ
床では硝化菌を優占種にすることにより該ＢＯＤを除去
された処理水に含有されるＮ）１４−Ｎを高効率に硝化
し、生成されたＮ０Ｘ−Ｎを嫌気性ろ床工程に返送・循
環することであるが、その他の特徴を列挙すれば下記の
通りである。The first feature of the present invention is that, in particular, BOD is removed from treated water that has been biologically denitrified in the anaerobic filter process in a contact aeration process (catalytic oxidation) before it flows into the aerobic filter process. In the aerobic filter bed, the N)14-N contained in the BOD-removed treated water is highly efficiently nitrified by making nitrifying bacteria the dominant species, and the generated NOX-N is transferred to the anaerobic filter bed. The other features are as follows.
■ 嫌気性ろ床工程下部に沈澱部を設け、汚泥を溜め、
汚水を該沈澱部あるいは沈澱部ならびに充填材層と沈澱
部との間に連続または間欠的に流入させて（即ち、汚水
の導入位置は、沈澱部のみでも沈澱部と充填材層に分配
しても、あるいは沈澱部と充填材層との間と前記部分等
、少なくとも沈澱部が含まれれば良い、）、この汚泥と
汚水を攪拌するか、更に、撹拌機等を用いて機械的に攪
拌を強化することにより、汚泥の可溶化を促進し、かつ
生成したＢＯＤ物質を洗い出すことにより脱窒素用ＢＯ
Ｄ源を補給し嫌気性ろ床工程上部に設けられた充填層に
おける脱窒素効率をたかめる。■ A settling section is provided at the bottom of the anaerobic filter bed process to collect sludge.
Sewage is allowed to flow continuously or intermittently into the sedimentation section or between the sedimentation section and the filler layer and the sedimentation section (i.e., the sewage is introduced into the sedimentation section alone or distributed between the sedimentation section and the filler layer). Alternatively, the sludge and sewage may be stirred, or the sludge and sewage may be stirred mechanically using a stirrer or the like. By strengthening the sludge, it promotes the solubilization of sludge, and by washing out the generated BOD substances, it becomes a BO for denitrification.
The D source is replenished to increase the denitrification efficiency in the packed bed provided above the anaerobic filter bed process.
■ 嫌気性ろ床工程の後段に好気性ろ床工程用原水槽を
兼ねた接触曝気工程（接触酸化）を設け、ＢＯＤを極力
除去した後、好気性ろ床工程で該ＮＨ，−Ｎの硝化を行
う。好気性ろ床工程へのＢＯＤ流入量がわずかなため高
効率の硝化を行うことが可能となる。■ A contact aeration process (catalytic oxidation) that also serves as a raw water tank for the aerobic filter process is installed after the anaerobic filter process, and after removing as much BOD as possible, the NH and -N are nitrified in the aerobic filter process. I do. Since the amount of BOD flowing into the aerobic filter bed process is small, highly efficient nitrification can be performed.
■ 嫌気性ろ床工程と好気性ろ床工程間に該好気性ろ床
用原水槽を兼ねた接触曝気工程（接触酸化）を設けるこ
とにより負荷変動に強い処理が可能となる。特に、水量
変動に対して緩衝性が大である。(2) Providing a contact aeration process (catalytic oxidation) that also serves as a raw water tank for the aerobic filter bed between the anaerobic filter bed process and the aerobic filter bed process enables processing that is resistant to load fluctuations. In particular, it has great buffering properties against fluctuations in water volume.
本発明の嫌気性ろ床工程においては、ＮＯ，−Ｎの脱窒
素処理の他、通常の有機物の嫌気性生物消化、ＳＳの物
理的濾過などが実施される。In the anaerobic filter bed process of the present invention, in addition to denitrification treatment of NO and -N, usual anaerobic biological digestion of organic matter, physical filtration of SS, etc. are carried out.
又、嫌気性ろ床工程において、例えば、下水においては
、汚泥から洗い出されるＢＯＤ量は、導入される汚水の
ＢＯＤ量の１０χ〜４ｏχの範囲が好ましい。１０％以
下だと脱窒素効率の向上が見込めないので好ましくなく
、４０％以上だと不当にプロセス全体の微生物に負担を
かける結果汚水自体の総体的な処理効率が低下するため
好ましくない。また、充填材層１ｒｒｒあたりの生物処
理前のＢＯＤ総量は、導入される汚水に含有されるＮ０
Ｘ−Ｎおよび該好気性ろ床から循環されるＮ０Ｘ−Ｎ量
に対応して決定され得るが、−船釣には、下水において
は、２０■／！〜８０■／ｌになるように該汚泥に対す
る攪拌あるいは導入汚水の導入手段（間欠的導入）、水
圧等またはそれらの両方により調整されることが好まし
い。Further, in the anaerobic filter bed process, for example, in the case of sewage, the amount of BOD washed out from the sludge is preferably in the range of 10x to 4ox of the amount of BOD of the sewage introduced. If it is less than 10%, no improvement in denitrification efficiency can be expected, which is undesirable, and if it is more than 40%, it is undesirable because it places an undue burden on the microorganisms in the entire process, resulting in a decrease in the overall treatment efficiency of the wastewater itself. In addition, the total amount of BOD before biological treatment per rrr of filler layer is the N0 contained in the introduced wastewater.
It can be determined according to the amount of X-N and the amount of N0X-N circulated from the aerobic filter bed. It is preferable that the sludge be stirred, introduced by means of introducing sewage (intermittent introduction), water pressure, etc., or adjusted to be 80 μ/l, or both.
該嫌気性ろ床工程にて処理された汚水は、該接触曝気工
程（接触酸化）に導入されるが、該接触曝気工程（接触
酸化）は、ＢＯＤ酸化菌の他、硝化菌を保持していても
よい。The wastewater treated in the anaerobic filter bed process is introduced into the contact aeration process (catalytic oxidation), which retains nitrifying bacteria in addition to BOD oxidizing bacteria. You can.
該接触曝気工程（接触酸化）でＢＯＤ除去処理された後
、好気性ろ床へ導入される水は、下水においては、好ま
しくは、ｌＯ■／ｌ以下のＢＯＤ濃度、且つ、１０〜１
５［＃！のＮＨ，−Ｎ濃度範囲が好ましい。In sewage, the water introduced into the aerobic filter bed after BOD removal treatment in the contact aeration step (catalytic oxidation) preferably has a BOD concentration of 10 to 1
5 [#! NH, -N concentration range is preferred.
好気性ろ床工程で処理された水、即ち、嫌気性ろ床工程
に循環される水に含有されるＮＨ４−Ｎ量は好ましくは
１ｍｇ／ｌ以下、８０口は５■７２以下、ＳＳは１０■
／Ｉ！、以下が好ましく、又、嫌気性ろ床に循環される
Ｎ０ｘ−Ｎ量は、循環水１ｆｆｉ当たり、好ましくは、
該嫌気性ろ床の充填材層に導入される汚水ｌＮ当たりの
該ＢＯＤ総量の１０〜４０χの範囲が好ましい。The amount of NH4-N contained in the water treated in the aerobic filter bed process, that is, the water recycled to the anaerobic filter bed process, is preferably 1 mg/l or less, 80 mouths is 5 x 72 or less, SS is 10 ■
/I! The following is preferable, and the amount of N0x-N circulated to the anaerobic filter bed is preferably the following per 1ffi of circulating water:
The total amount of BOD per 1N of wastewater introduced into the packing material layer of the anaerobic filter bed is preferably in the range of 10 to 40.
〔作用］
以下、本発明の作用を具体的実施態様と共に第１図を参
照して説明する。[Function] Hereinafter, the function of the present invention will be explained with reference to FIG. 1 together with specific embodiments.
■は上向流式嫌気性ろ床工程を示し、嫌気性ろ床下部に
は攪拌機２を設けた沈澱部３がある。攪拌機の攪拌速度
は、沈澱部汚泥濃度を濃度計４で検知し、自動的に撹拌
モータ５の速度を変化させる。沈澱部からの排泥は排泥
管６を定期的に開き行う。汚水７は、沈澱部活泥層を通
過する様、嫌気性ろ床工程底部８に連続または間欠的に
導入される。嫌気性ろ床の充填材９は、閉塞しにくいも
の例えば、帯状、網状、すだれ状のものが適しているが
、これに限定されるものではなく、粒状でもよく公知の
ものが使用できる。嫌気性ろ床工程流出水ＩＯは、好気
性ろ床工程の原水層を兼ねる接触曝気工程（接触酸化）
１１に導入されＢＯＤが除去される。接触曝気工程は底
部に給気管１２がある。接触曝気工程の充填材は嫌気性
ろ床充填材と同様のものが適しているが、これに限定さ
れるものでなく、公知のものが使用できる。3 shows an upflow anaerobic filter bed process, and a settling section 3 equipped with a stirrer 2 is located below the anaerobic filter bed. The stirring speed of the stirrer is determined by detecting the concentration of sludge in the sedimentation area using a densitometer 4, and automatically changing the speed of the stirring motor 5. The sludge removal pipe 6 is periodically opened to remove sludge from the settling section. The wastewater 7 is continuously or intermittently introduced into the anaerobic filter bed process bottom 8 so as to pass through the active mud layer of the sedimentation section. The packing material 9 of the anaerobic filter bed is suitably a material that does not easily clog, such as a band-like, net-like, or slat-like material, but is not limited thereto, and any known material may be used, even granular materials may be used. The effluent water IO from the anaerobic filter bed process is used in the contact aeration process (catalytic oxidation), which also serves as the raw water layer for the aerobic filter bed process.
11 and BOD is removed. The contact aeration process has an air supply pipe 12 at the bottom. The packing material for the contact aeration step is suitable to be the same as the anaerobic filter bed packing material, but it is not limited thereto, and any known material can be used.
接触曝気工程の処理水１３は好気性ろ床工程１４に導入
される。好気性ろ床工程は底部に給気管１５がある。好
気性ろ床の充填材１６は、アンスラサイト、活性炭、砂
等公知のものが使用出来る。Treated water 13 from the contact aeration process is introduced into an aerobic filter bed process 14. The aerobic filter bed process has an air supply pipe 15 at the bottom. As the filling material 16 of the aerobic filter bed, known materials such as anthracite, activated carbon, and sand can be used.
好気性ろ床工程の処理水１７は処理水槽１８へ導入され
、その一部は嫌気性ろ床工程１へ循環１９し脱窒素され
る。この場合の好気性ろ床工程の処理水の嫌気性ろ床工
程への導入位置は、好ましくは、沈澱部３の汚泥層を通
るようにするのが良い。The treated water 17 of the aerobic filter bed process is introduced into the treated water tank 18, and a part of it is circulated 19 to the anaerobic filter bed process 1 and denitrified. In this case, the introduction position of the treated water from the aerobic filter process into the anaerobic filter process is preferably such that it passes through the sludge layer of the settling section 3.
以下、本発明の具体的実施例を説明するが、本発明はこ
れに限定されるものではない。Hereinafter, specific examples of the present invention will be described, but the present invention is not limited thereto.
上記第１図に示したフローに従って汚水処理を実施した
。Sewage treatment was carried out according to the flow shown in Figure 1 above.
■ 嫌気性ろ床工程の汚泥層中に下記表−１記載のＢＯ
Ｄ濃度を有する汚水の原水を通水し、且つ汚泥層を攪拌
機で攪拌することにより、汚泥層へ原水を通水するのみ
で汚泥を攪拌した場合、および充填材層下部に原水を通
水して汚泥層を攪拌しなかった場合に比べ充填材への導
入水のＢＯＤ濃度は上昇したが、特に、攪拌しなかった
場合に比べ２４■／ｅ以上上昇した（表−１）。■ The BO listed in Table 1 below is present in the sludge layer of the anaerobic filter bed process.
By passing the raw water of sewage having D concentration and stirring the sludge layer with an agitator, there are cases where the sludge is stirred by simply passing the raw water through the sludge layer, and when the raw water is passed through the lower part of the filler layer. The BOD concentration of the water introduced into the filler material increased compared to the case where the sludge layer was not stirred, and in particular, it increased by more than 24 .mu./e compared to the case where the sludge layer was not stirred (Table 1).
表−Ｉ ＢＯＤ溶出状況（嫌気性ろ床工程）（■／ｌ
）Ａ：汚泥層中に汚水を通水し、
且つ攪拌機で汚泥
層を攪拌
Ｂ：汚泥層中に汚水を通水のみで汚泥を攪拌嫌気性ろ成
工程の脱窒素率は、上記通水方法（汚泥層中に汚水を通
水し、且つ汚泥層を攪拌）で行うとほぼ１００χである
のに対し、汚泥層上部から原水を通水して汚泥層を攪拌
しなかった場合は６０％程度であった（第２図参照）。Table-I BOD elution status (anaerobic filter bed process) (■/l
)A: Sewage is passed through the sludge layer, and the sludge layer is agitated with an agitator B: The sludge is stirred by only passing sewage through the sludge layer The denitrification rate of the anaerobic filtration process is determined by the water flow method described above (by passing sewage into the sludge layer and stirring the sludge layer), it is approximately 100χ, whereas when raw water is passed from the top of the sludge layer and the sludge layer is not stirred, it is approximately 60%. (See Figure 2).
■ 好気性ろ成工程用原水槽を兼ねた接触曝気工程のＢ
ＯＤ除去効果は嫌気性ろ尿流出水ＢＯＤ１５〜２０■／
ｉのものが３０分程度の接触時間で５■／ｌ以下となっ
た。■ Contact aeration process B which also serves as raw water tank for aerobic filtration process
OD removal effect is anaerobic filtration effluent water BOD15-20■/
The concentration of sample i was less than 5 .mu./l after a contact time of about 30 minutes.
この接触曝気工程を設けなかった場合、好気性ろ成工程
における嫌気性ろ尿流出水処理は、ＮＨ３−Ｎ負荷０．
３５）ｃｇ−Ｎ／ｒ４・日が限界であったが、この接触
曝気工程を設けることにより接触曝気工程の処理水の好
気性ろ床処理はＮｆ（、−Ｎ負荷０． ８ｋｇ−Ｎ７ｍ
・日まで硝化効率を増加できた。If this contact aeration step is not provided, the anaerobic filtration effluent treatment in the aerobic filtration step will result in an NH3-N load of 0.
35) The limit was cg-N/r4·day, but by providing this contact aeration process, the aerobic filter bed treatment of the treated water in the contact aeration process has reduced Nf(, -N load 0.8kg-N7m)
・The nitrification efficiency could be increased up to the day.
この時の好気性ろ成工程の処理水質は、接触曝気工程を
設けたために処理水質が悪化することはな（ＢＯＤ２■
／ｌ以下、ＳＳ５■／Ｉｔ、 Ｔ−Ｎ１０ａｇ＃！以下
であった。At this time, the quality of the treated water in the aerobic filtration process did not deteriorate due to the provision of the contact aeration process (BOD2
/l or less, SS5■/It, T-N10ag#! It was below.
本発明は、嫌気性ろ成工程のＢＯＤＩ度不足による脱窒
素効率の低下を汚泥層の攪拌により効果的に防止するこ
とができると共に、嫌気性ろ成工程と好気性ろ成工程の
間の接触曝気工程を設けたことにより好気性ろ成工程の
ＮＨ３−Ｎの硝化効率を顕著の向上するこたができ、ひ
いては嫌気性ろ床におけるＮ０ＸＮの脱窒素効率をも大
幅に高めることができたものであり、かつ処理汚水の負
荷変動に対しても安定した処理を省力的に実施すること
ができる。The present invention can effectively prevent a decrease in denitrification efficiency due to insufficient BODI degree in the anaerobic filtration process by stirring the sludge layer, and also improves the contact between the anaerobic filtration process and the aerobic filtration process. By providing an aeration process, we were able to significantly improve the NH3-N nitrification efficiency in the aerobic filtration process, and in turn, we were able to significantly increase the NOxN denitrification efficiency in the anaerobic filter bed. Moreover, stable treatment can be carried out in a labor-saving manner even in response to load fluctuations in treated sewage.
第１図は、本発明の具体的実施例を説明するためのフロ
ーシートを示す図、第２図は、嫌気性ろ成工程における
脱窒素率を示すグラフである。
符号の説明：
１：上向流式嫌気性ろ成工程 ２：攪拌機３：沈澱部
４：濃度計５：攪拌モータ
６：排泥管７：汚水 ８：嫌気性ろ成工程
底部９：充填材 １０：嫌気性ろ成工程流出水：接
触曝気工程 １２：給気管：接触曝気工程の処
理水
：好気性ろろ成工程 １５：給気管：充填材 １７
：好気性ろ成工程処理水：処理水槽 １９：循環
手続補
正
書
平成２年
５月FIG. 1 is a diagram showing a flow sheet for explaining a specific example of the present invention, and FIG. 2 is a graph showing the denitrification rate in the anaerobic filtration process. Explanation of symbols: 1: Upflow anaerobic filtration process 2: Stirrer 3: Sedimentation section
4: Concentration meter 5: Stirring motor
6: Sludge pipe 7: Sewage 8: Anaerobic filtration process bottom 9: Filling material 10: Anaerobic filtration process effluent: Contact aeration process 12: Air supply pipe: Treated water of contact aeration process: Aerobic filtration process Process 15: Air supply pipe: Filling material 17
:Aerobic filtration process treated water: Treated water tank 19: Circulation procedure amendment May 1990
Claims (2)
充填材層とその下部に汚泥を保持する沈澱部を有する構
造の嫌気性ろ床工程と、好気性微生物を付着させる充填
材が充填された接触曝気工程と、好気性微生物を付着さ
せる充填材が充填された好気性ろ床工程とからなり、汚
水を前記嫌気性ろ床工程の沈澱部あるいは沈澱部ならび
に充填材層と沈澱部との間に流入させて少なくとも生物
学的脱窒素処理したのち、該生物学的脱窒素処理された
処理水を前記接触曝気工程にて少なくともＢＯＤ除去し
、次に該ＢＯＤ除去された処理水を前記好気性ろ床工程
にて生物学的硝化処理し、かつ該生物学的硝化処理され
た処理水の一部を前記嫌気性ろ床工程に循環することを
特徴とする汚水の処理方法。(1) An anaerobic filter bed process with a structure that has a filler layer filled with a filler containing anaerobic microorganisms on the top and a sedimentation section below that that holds sludge, and a filler layer that is filled with a filler that attaches aerobic microorganisms. and an aerobic filter bed step filled with a filler to which aerobic microorganisms adhere. After at least biological denitrification treatment is performed by flowing the biologically denitrified treated water between the steps, at least BOD is removed from the biologically denitrified treated water in the contact aeration step, and then the BOD-removed treated water is A method for treating wastewater, which comprises subjecting wastewater to biological nitrification treatment in an aerobic filter bed step, and circulating a portion of the biologically nitrified treated water to the anaerobic filter bed step.
設け、汚水を該沈澱部に流入させ、汚水と汚泥の接触を
充分に行ったのち、前記嫌気性微生物を付着させる充填
材層を通すことを特徴とする請求項１記載の汚水の処理
方法。(2) A sludge layer agitator is installed in the sedimentation section provided at the bottom of the anaerobic filter bed, and the sewage is allowed to flow into the sedimentation section, and after sufficient contact between the sewage and sludge, the anaerobic microorganisms are attached to the filler. The method for treating wastewater according to claim 1, characterized in that the wastewater is passed through a layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2818090A JPH0779998B2 (en) | 1990-02-09 | 1990-02-09 | Sewage treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2818090A JPH0779998B2 (en) | 1990-02-09 | 1990-02-09 | Sewage treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03232590A true JPH03232590A (en) | 1991-10-16 |
| JPH0779998B2 JPH0779998B2 (en) | 1995-08-30 |
Family
ID=12241522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2818090A Expired - Lifetime JPH0779998B2 (en) | 1990-02-09 | 1990-02-09 | Sewage treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0779998B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07328690A (en) * | 1994-06-01 | 1995-12-19 | Kurita Water Ind Ltd | Treatment of organic waste water |
| KR100304068B1 (en) * | 1999-04-14 | 2001-09-24 | 김재모 | Biological Water Treatment Apparatus Using Biological Membrane Filtration and Process thereof(SBF) |
| KR100369710B1 (en) * | 2000-07-13 | 2003-01-30 | 한국과학기술연구원 | A biological treatment process of dye waste water using granulated active carbon as a support material |
| KR100430578B1 (en) * | 2002-02-20 | 2004-05-10 | 송영채 | The organic material and nitrogen removal system using the three phase fluidized bed biofilm reactors |
| CN103864214A (en) * | 2014-03-31 | 2014-06-18 | 温州大学 | Buried sewage ecological treatment system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9072554B2 (en) | 2005-09-21 | 2015-07-07 | Children's Hospital Medical Center | Orthopedic implant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63229197A (en) * | 1987-03-16 | 1988-09-26 | Hitachi Plant Eng & Constr Co Ltd | Anaerobic filter bed type tank of sewage treatment |
| JPS63302995A (en) * | 1987-06-03 | 1988-12-09 | Fuji Electric Co Ltd | Method for operating fixed-bed type waste water treating device |
| JPH0199690A (en) * | 1987-10-09 | 1989-04-18 | Ohbayashi Corp | Anaerobic waste water treatment device |
-
1990
- 1990-02-09 JP JP2818090A patent/JPH0779998B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63229197A (en) * | 1987-03-16 | 1988-09-26 | Hitachi Plant Eng & Constr Co Ltd | Anaerobic filter bed type tank of sewage treatment |
| JPS63302995A (en) * | 1987-06-03 | 1988-12-09 | Fuji Electric Co Ltd | Method for operating fixed-bed type waste water treating device |
| JPH0199690A (en) * | 1987-10-09 | 1989-04-18 | Ohbayashi Corp | Anaerobic waste water treatment device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07328690A (en) * | 1994-06-01 | 1995-12-19 | Kurita Water Ind Ltd | Treatment of organic waste water |
| KR100304068B1 (en) * | 1999-04-14 | 2001-09-24 | 김재모 | Biological Water Treatment Apparatus Using Biological Membrane Filtration and Process thereof(SBF) |
| KR100369710B1 (en) * | 2000-07-13 | 2003-01-30 | 한국과학기술연구원 | A biological treatment process of dye waste water using granulated active carbon as a support material |
| KR100430578B1 (en) * | 2002-02-20 | 2004-05-10 | 송영채 | The organic material and nitrogen removal system using the three phase fluidized bed biofilm reactors |
| CN103864214A (en) * | 2014-03-31 | 2014-06-18 | 温州大学 | Buried sewage ecological treatment system |
| CN103864214B (en) * | 2014-03-31 | 2016-02-10 | 温州大学 | A kind of buried sewage ecological treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0779998B2 (en) | 1995-08-30 |
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