JPH0779998B2 - Sewage treatment method - Google Patents
Sewage treatment methodInfo
- Publication number
- JPH0779998B2 JPH0779998B2 JP2818090A JP2818090A JPH0779998B2 JP H0779998 B2 JPH0779998 B2 JP H0779998B2 JP 2818090 A JP2818090 A JP 2818090A JP 2818090 A JP2818090 A JP 2818090A JP H0779998 B2 JPH0779998 B2 JP H0779998B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- anaerobic
- aerobic
- filter bed
- bod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 42
- 239000010865 sewage Substances 0.000 title claims description 25
- 238000011282 treatment Methods 0.000 title claims description 25
- 239000010802 sludge Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 238000005273 aeration Methods 0.000 claims description 22
- 239000000945 filler Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 13
- 238000004062 sedimentation Methods 0.000 claims description 10
- 244000005700 microbiome Species 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 7
- 230000001546 nitrifying effect Effects 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 6
- 238000003756 stirring Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 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
- 238000005516 engineering process Methods 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
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 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
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 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
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)
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。TECHNICAL FIELD The present invention relates to purification treatment of organic sewage such as sewage, night soil, industrial wastewater, and particularly organic sewage such as small-scale 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 sewage has been carried out by applying means such as floating treatment and fixing 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, for sewage treatment combining anaerobic filter bed and aerobic filter bed, for example, a process of anaerobic treatment → aerobic treatment → returning / decomposing sludge of aerobic filter bed to the anaerobic filter bed may be used. Since it is possible to reduce the amount of sludge generated as compared with the anaerobic filter bed or the aerobic filter bed alone treatment, it is advantageous, and since it is possible to carry out various treatments, there is an advantage that its application range is extremely wide.
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 the conventional biological treatments using a combination of an anaerobic filter bed and an aerobic filter bed, the biological treatments including denitrification treatment have the following problems.
小規模な下水の場合、流量変動や濃度変動が大きく
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, flow rate fluctuations and concentration fluctuations are large.
It is not possible to set a high load because the nitrogen concentration is high relative to the BOD substance and the available BOD for denitrification is insufficient and denitrification becomes insufficient. The addition of a BOD source is necessary to increase the treatment 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 aerobic filters, the growth rate of nitrifying bacteria is much slower than that of BOD-oxidizing bacteria. Therefore, if the residence time is shortened below a certain limit or the BOD load is increased, nitrifying bacteria are washed out and nitrification becomes 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。The conventional technology is vulnerable to load fluctuations, difficult to maintain and manage, and it is necessary to increase the size of the facility to compensate for them.
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 is intended to solve the above-mentioned problems of the prior art, and enhances the treatment efficiency of anaerobic filter (denitrification) and aerobic filter (nitrification) and stabilizes sewage resistant to load fluctuations. Is to provide a processing method.
本発明は下記（１）〜（２）記載のものであり、これに
より上記課題を解決することができる。The present invention is described in the following (1) and (2), and by doing so, the above problems can be solved.
（１） 上部に脱窒素能力を有する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
させてかつ該充填材層と該沈殿部との間にNOx−Ｎを含
有する循環水を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
記循環水として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 of a structure having a packing material layer filled with a packing material containing anaerobic microorganisms having a denitrification capacity in the upper part and a sedimentation part holding sludge in the lower part, and attaching aerobic microorganisms A contact aeration step filled with a filling material,
And an aerobic filter bed filled with a filler for adhering aerobic microorganisms, wherein sewage is introduced between the settling part or the settling part and the packing material layer and the settling part of the anaerobic filter step and After at least biological denitrification by introducing the circulating water containing NO x -N between the filler layer and the precipitate portion, the contact aeration of biological denitrification is treated water At least BOD is removed in the step, then the treated water from which the BOD is removed is biologically nitrified in the aerobic filter step, and part of the biologically nitrified treated water is circulated. A method for treating sewage, which is circulated as water in the anaerobic filter step.
（２） 嫌気性ろ床下部に設けた沈澱部に汚泥層撹拌機
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、前記脱窒素能力を有する嫌気性微
生物を付着させる充填材層を通すことを特徴とする上記
（１）記載の汚水の処理方法。(2) A sludge layer stirrer is provided in the sedimentation section provided in the lower part of the anaerobic filter bed, and sewage is allowed to flow into the sedimentation section to sufficiently bring the sludge into contact with the sludge. The method for treating sewage according to (1) above, which comprises passing a filler layer to which microorganisms are attached.
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NH4−Ｎを高効率に硝化し、生成
されたNOx−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 to remove BOD in the contact aeration step (contact oxidation) before the treated water that has been subjected to biological denitrification treatment in the anaerobic filter step before flowing into the aerobic filter step, In the aerobic filter bed, nitrifying bacteria are used as the dominant species to efficiently nitrify NH 4 —N contained in the treated water from which the BOD has been removed, and the produced NO x —N is anaerobic filter bed. Although it is returned to the process and circulated, other features are listed below.
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
と汚水を撹拌するか、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BOD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 sedimentation part is provided at the bottom of the anaerobic filter bed to collect sludge,
Sewage is caused to flow continuously or intermittently between the settling section or the settling section and between the filler layer and the settling section (that is, the position of introducing the wastewater is distributed only to the settling section and to the settling section and the filler layer). Alternatively, it is sufficient that at least the sedimented portion, such as the portion between the sedimented portion and the filler layer and the above-mentioned portion, is included.), Or this sludge and waste water are stirred, or further mechanically stirred using a stirrer or the like. By strengthening it, the solubilization of sludge is promoted, and the BOD source for denitrification is replenished by washing out the produced BOD substance to enhance the denitrification efficiency in the packed bed provided in the upper part of 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NH4−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。After the anaerobic filter process, a contact aeration process (contact oxidation) that doubles as a raw water tank for the aerobic filter process is installed to remove BOD as much as possible, and then the NH 4 -N is nitrified in the aerobic filter process. To do.
Since the amount of BOD inflow to the aerobic filter process is small, it is possible to perform highly efficient nitrification.
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。By providing a contact aeration step (contact oxidation) that also serves as the aerobic filter raw water tank between the anaerobic filter step and the aerobic filter step, a treatment that is resistant to load fluctuations becomes possible. In particular, it has a great buffering property against fluctuations in water volume.
本発明の嫌気性ろ床工程においては、NOx−Ｎの脱窒素
処理の他、SSの物理的濾過などが実施される。In anaerobic filter bed process of the present invention, other denitrification treatment of NO x -N, like physical filtration of SS is performed.
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B
OD量の10％〜40％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1m3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NOx−Ｎおよび該好気
性ろ床から循環されるNOx−Ｎ量に対応して決定され得
るが、一般的には、下水においては、20mg/〜80mg/
になるように該汚泥に対する撹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。In the anaerobic filtration step, for example, in sewage, the amount of BOD washed out from sludge is
The range of 10% to 40% of the OD amount is preferable. If it is 10% or less, the improvement of denitrification efficiency cannot be expected, and if it is 40% or more, it is not preferable because it unduly burdens the microorganisms of the whole process and the overall treatment efficiency of the wastewater itself is lowered. The total amount of BOD before 1 m 3 of the packing material layer before biological treatment is determined in accordance with the amount of NO x —N contained in the introduced wastewater and the amount of NO x —N circulated from the aerobic filter bed. Generally, in sewage, 20 mg / -80 mg /
It is preferable to adjust the agitation of the sludge or the introduction means of the introduced wastewater (intermittent introduction), the water pressure, etc., or both of them so that
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 sewage treated in the anaerobic filter step is introduced into the contact aeration step (contact oxidation), and the contact aeration step (contact oxidation) retains nitrifying bacteria in addition to BOD oxidizing bacteria. May be.
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、10mg/以下のBOD濃度、且つ、10〜15mg/のNH4
−Ｎ濃度範囲が好ましい。After the BOD removal treatment in the contact aeration step (contact oxidation),
Water introduced into the aerobic basin, in the sewage, preferably, 10 mg / less BOD concentration, and, 10 to 15 mg / NH 4 of
A -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
/以下、BODは5mg/以下、SSは10mg/以下が好まし
く、又、嫌気性ろ床に循環されるNOx−Ｎ量は、循環水
１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１当たりの該BOD総量の10〜40％の範囲
が好ましい。The amount of NH 4 -N contained in the water treated in the aerobic filter step, that is, the water circulated in the anaerobic filter step is preferably 1 mg.
/ Or less, BOD is 5mg / or less, SS is preferably 10mg / or less, and, NO x -N amount of circulated to the anaerobic filter bed is circulating water per preferably anaerobic filter bed filler A range of 10-40% of the total BOD per sewage introduced into the bed is preferred.
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。Hereinafter, the operation of the present invention will be described with reference to FIG. 1 together with specific embodiments.
１は上向流式嫌気性ろ床工程を示し、嫌気性ろ床下部に
は撹拌機２を設けた沈澱部３がある。撹拌機の撹拌速度
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、沈澱部汚泥層を通
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10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。Reference numeral 1 indicates an upward flow type anaerobic filter bed process, and a precipitation part 3 provided with a stirrer 2 is provided below the anaerobic filter bed. As for the stirring speed of the stirrer, the concentration of sludge in the sedimentation portion is detected by the densitometer 4, and the speed of the stirring motor 5 is automatically changed. The sludge discharge pipe 6 is periodically opened to discharge the sludge from the settling section. The sewage 7 is continuously or intermittently introduced into the bottom 8 of the anaerobic filter bed process so as to pass through the sludge layer of the sedimentation part. As the filling material 9 for the anaerobic filter bed, those which are hard to be clogged, for example, those having a band shape, a net shape, or a blind shape are suitable, but the material is not limited thereto, and a well-known material may be used in a granular form. The anaerobic filter bed process runoff 10 is a contact aeration process (contact oxidation) that also serves as the raw water layer of the aerobic filter bed process.
Introduced in 11 to remove BOD. The contact aeration process has an air supply pipe 12 at the bottom. The filler used in the contact aeration step is preferably the same as the anaerobic filter bed filler, but the filler is not limited to this and any known filler 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。The treated water 13 in the contact aeration step is introduced into the aerobic filter step 14. The aerobic filter process has an air supply pipe 15 at the bottom. As the filler 16 for 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、図示の通り充填材層９を沈澱部３との間で
ある。Treated water 17 in the aerobic filter bed process is introduced into a treated water tank 18, and a part of it is circulated 19 to the anaerobic filter bed process 1 for denitrification. In this case, the introduction position of the treated water of the aerobic filter bed step into the anaerobic filter bed step is between the filler layer 9 and the precipitation part 3 as shown in the figure.
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 performed according to the flow shown in FIG.
嫌気性ろ床工程の汚泥層中に下記表−１記載のBOD
濃度を有する汚水の原水を通水し、且つ汚泥層を撹拌機
で撹拌することにより、汚泥層へ原水を通水するのみで
汚泥を撹拌した場合、および充填材層下部に原水を通水
して汚泥層を撹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、撹拌しなかった場合
に比べ24mg/以上上昇した（表−１）。BOD shown in Table 1 below in the sludge layer of the anaerobic filter bed process
When the raw water of a certain concentration is passed and the sludge layer is agitated by a stirrer, the raw water is passed only to the sludge layer and the sludge is agitated. The BOD concentration of the water introduced into the packing material increased compared to the case where the sludge layer was not agitated, but in particular, it increased by 24 mg / min or more compared to the case where it was not stirred (Table-1).
A:汚泥層中に汚水を通水し、且つ撹拌機で汚泥層を撹拌 B:汚泥層中に汚水を通水のみで汚泥を撹拌 嫌気性ろ床工程の脱窒素率は、上記通水方法（汚泥層中
に汚水を通水し、且つ汚泥層を撹拌）で行うとほぼ100
％であるのに対し、汚泥層上部から原水を通水して汚泥
層を撹拌しなかった場合は60％程度であった（第２図参
照）。 A: Sewage is passed through the sludge layer, and the sludge layer is stirred by a stirrer B: Sludge is stirred only by passing the sludge layer into the sludge layer. Approximately 100 when performed by passing the wastewater through the sludge layer and stirring the sludge layer
In contrast, when the raw water was passed from the upper part of the sludge layer and the sludge layer was not agitated, it was about 60% (see Fig. 2).
嫌気性ろ床工程用原水槽を兼ねた接触曝気工程のBO
D除去効果は嫌気性ろ床流出水BOD15〜20mg/のものが3
0分程度の接触時間で5mg/以下となった。BO of contact aeration process that doubles as a raw water tank for anaerobic filtration process
D removal effect is 3 with anaerobic filter bed effluent BOD 15-20 mg /
The contact time was about 0 minutes, resulting in a dose of 5 mg / or less.
この接触曝気工程を設けなかった場合、好気性ろ床工程
における嫌気性ろ床流出水処理は、NH3−Ｎ負荷0.35kg
−N/m3・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
NH3−Ｎ負荷0.8kg−N/m3・日まで硝化効率を増加でき
た。If not provided with the contact aeration process, anaerobic filter bed effluent water treatment in aerobic basin step, NH 3 -N loads 0.35kg
-N / m 3 · day was the limit, but by providing this contact aeration process, aerobic filter treatment of treated water in the contact aeration process
NH 3 -N load 0.8kg-N / m 3 · Nitrification efficiency could be increased up to day.
この時の好気性ろ床工程の処理水質は、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くBOD2mg/
以下、SS5mg/、Ｔ−N10mg/以下であった。At this time, the treated water quality in the aerobic filter process did not deteriorate because the contact aeration process was provided, and the BOD was 2 mg / mg.
Hereafter, SS was 5 mg / and T-N was 10 mg /.
本発明は、嫌気性ろ床工程のBOD濃度不足による脱窒素
効率の低下を汚泥層の撹拌により効果的に防止すること
ができると共に、嫌気性ろ床工程と好気性ろ床工程の間
の接触曝気工程を設けたことにより好気性ろ床工程のNH
3−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NOx−Ｎ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 lack of BOD concentration in the anaerobic filter bed step by stirring the sludge layer, and contact between the anaerobic filter bed step and the aerobic filter bed step. NH of aerobic filter bed process by providing aeration process
Nitrification efficiency of 3 -N can Oda to significantly improve, are those were able to significantly increase the denitrification efficiency of NO x -N in turn anaerobic filter bed, and the load fluctuation of the process wastewater On the other hand, stable processing can be performed labor-savingly.
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、嫌気性ろ床工程における
脱窒素率を示すグラフである。 符号の説明： 1:上向流式嫌気性ろ床工程、2:撹拌機 3:沈澱部、4:濃度計 5:撹拌モータ、6:排泥管 7:汚水、8:嫌気性ろ床工程底部 9:充填材、10:嫌気性ろ床工程流出水 11:接触曝気工程、12:給気管 13:接触曝気工程の処理水 14:好気性ろろ床工程、15:給気管 16:充填材、17:好気性ろ床工程処理水 18:処理水槽、19:循環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 a denitrification rate in an anaerobic filter bed process. Explanation of code: 1: Upflow type anaerobic filter process, 2: Stirrer 3: Sedimentation part, 4: Concentration meter 5: Agitation motor, 6: Sludge pipe 7: Waste water, 8: Anaerobic filter process Bottom 9: Filler, 10: Outflow of anaerobic filter process 11: Contact aeration process, 12: Air supply pipe 13: Treated aeration process water 14: Aerobic filter bed process, 15: Air supply pipe 16: Filler , 17: Treated water in aerobic filter process 18: Treated water tank, 19: Circulation
フロントページの続き (56)参考文献 特開 昭63−302995（ＪＰ，Ａ) 特開 昭57−144092（ＪＰ，Ａ) 特開 平１−99690（ＪＰ，Ａ) 実開 昭50−49947（ＪＰ，Ｕ)Continuation of the front page (56) Reference JP 63-302995 (JP, A) JP 57-144092 (JP, A) JP 1-99690 (JP, A) Actual development Sho 50-49947 (JP , U)
Claims (2)
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
流入させてかつ該充填材層と該沈殿部との間にNOx−Ｎ
を含有する循環水を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
を前記循環水として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 filtration step having a structure having a packing material layer having a packing material containing anaerobic microorganisms having a denitrification capacity in the upper part and a sedimentation part holding sludge in the lower part, and an aerobic microorganism. Contacting aeration step filled with a filler for adhering, and an aerobic filter bed step filled with a filler for adhering aerobic microorganisms, the sewage is a precipitation part or a precipitation part of the anaerobic filter step and NO x -N between allowed to flow and the filling material layer and a precipitate portion between the precipitation unit and the filler layer
Circulating biological water containing at least biological denitrification treatment, the biological denitrification treated water is at least BOD removed in the contact aeration step, and then the BOD is removed.
Biologically nitrifying the removed treated water in the aerobic filter step, and circulating a part of the biologically nitrified treated water as the circulating water in the anaerobic filter step. A method for treating sewage, which is characterized by:
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、前記脱窒素能力を有する嫌気
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 stirrer is provided in the sedimentation section provided in the lower part of the anaerobic filter bed, and the sludge is allowed to flow into the sedimentation section to sufficiently bring the sludge into contact with the sludge, and then the denitrification ability is obtained. The method for treating sewage according to claim 1, wherein a filler layer to which anaerobic microorganisms are attached is passed.
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 JPH03232590A (en) | 1991-10-16 |
| JPH0779998B2 true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9072554B2 (en) | 2005-09-21 | 2015-07-07 | Children's Hospital Medical Center | Orthopedic implant |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3704724B2 (en) * | 1994-06-01 | 2005-10-12 | 栗田工業株式会社 | Organic wastewater treatment |
| 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 |
| CN103864214B (en) * | 2014-03-31 | 2016-02-10 | 温州大学 | A kind of buried sewage ecological treatment system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0757351B2 (en) * | 1987-03-16 | 1995-06-21 | 日立プラント建設株式会社 | Sewage treatment equipment |
| 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
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9072554B2 (en) | 2005-09-21 | 2015-07-07 | Children's Hospital Medical Center | Orthopedic implant |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03232590A (en) | 1991-10-16 |
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