JP3449525B2 - Wastewater treatment equipment - Google Patents
Wastewater treatment equipmentInfo
- Publication number
- JP3449525B2 JP3449525B2 JP30136097A JP30136097A JP3449525B2 JP 3449525 B2 JP3449525 B2 JP 3449525B2 JP 30136097 A JP30136097 A JP 30136097A JP 30136097 A JP30136097 A JP 30136097A JP 3449525 B2 JP3449525 B2 JP 3449525B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- filter medium
- nitrification
- fiber
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、下水等の有機性
汚水の処理装置およびその処理装置に用いるろ材に関す
る。
【０００２】
【従来の技術】従来、上述のような有機性汚水の処理に
おける嫌気的脱窒槽は、流動床型あるいは、浮遊汚泥法
が用いられている。
【０００３】
【発明が解決しようとする課題】空隙率の低いアンスラ
サイト、セラミック等の粒状ろ材を用いた、固定床の嫌
気性生物処理装置は、汚水の性状からろ材の表層で目詰
まりしやすく、ろ過時間が短く、マッドボールが生じ易
く洗浄し難いため用いられない。したがって、嫌気性生
物処理装置は流動床型あるいは浮遊汚泥法にせざるをえ
ない。しかしながら、流動床型や浮遊汚泥法では、大き
な流動エネルギーが必要であり、ろ材充填密度が粗とな
るため槽自体も大きくなる。さらに流動床型や浮遊汚泥
法では、固形物（ＳＳ）の捕捉ができず、後段の硝化槽
に大きな固形物負荷がかかり、頻繁に洗浄しなければな
らない。硝化槽の頻繁な洗浄は、増殖速度の遅い硝化菌
を流出してしまうことになる。
【０００４】
【課題を解決するための手段】この発明は、ろ材に工夫
をすることと、ろ材層高と水層高との比率を６５：３５
〜５０：５０とすることによって、微細なＳＳまでも捕
捉しながら、目詰まりし難くかつ逆洗が容易なろ材層を
形成したものである。すなわち、ろ材として素材が芯を
ポリプロピレン、鞘をポリエチレンとした熱融着性複合
繊維で繊度が１８〜６５デニールである第１フィラメン
トと、素材がポリプロピレン繊維で繊度が３〜１０デニ
ールである第２フィラメントと、素材が芯をポリプロピ
レン、鞘をポリエチレンとした熱融着性複合繊維で繊度
が１．５〜６デニールである第３フィラメントを混綿し
たウェッブをニードルパンチング法により布形化し、両
面のウェッブ起毛状態を平滑化することなく加熱処理
し、前記ウェッブの重量が２００〜８００ｇ／平方メー
トル、厚みが２〜８ｍｍの布形化板状体を製作し、この
布形化板状体を３〜５ｍｍ角に裁断したものを用いた。
また、ろ材層高と水層高との比率を６５：３５〜５０：
５０とすることで、ろ材の洗浄を容易にした。
【０００５】
【発明の実施の形態】上記布形化板状体ろ材は、不織布
の一種であるため空隙率が大きく、微生物の付着に優れ
ている。このため、ろ材層中の微生物量を大きく保つこ
とができる。また、ろ過圧力や水抜き時の重力による押
しつぶれを防止するため、上記のごとく太さの異なる３
種類のフィラメントを用いている。上記布形化板状体ろ
材は、密に詰まっているのに空隙率が大きいので、目詰
まりによる圧力損失は小さく、嫌気性処理においてもい
わゆる表層ろ過とならず、ろ過時間が長い。洗浄は、ろ
材層高：水層高の比を６５：３５〜５０：５０とするこ
とで、下方からの散気で容易に流動攪乱し、捕捉された
ＳＳや余剰汚泥を分離することができる。この時の空気
量はアンスラサイトやセラミックろ材を用いた硝化槽に
比べ少なくてすむ。以下この発明に係るろ材を用いた排
水処理装置を図面に基づいて説明する。
【０００６】
【実施例】図１は、この発明に係る処理装置を示し、図
に随って説明する。図１において、符号１はその下部を
逆円錐状に形成して沈殿部を設けた脱窒槽、２は同じく
下部を逆円錐状に形成して沈殿部を設けた硝化槽、３は
脱窒槽および硝化槽に装入したろ材、４は原水の供給管
であり、５は処理水の取り出し管、６は硝化処理水の一
部を脱窒槽に循環する循環経路、７は脱窒処理水を硝化
槽２に供給する管、８は洗浄用空気の供給管である。
【０００７】この発明に係る装置は、上述のように構成
してあるので、原水は硝化槽２からの硝化処理水と混合
されて、脱窒槽１に供給される。脱窒槽１に供給された
混合水は、ろ材層中を上昇して微細な夾雑物が捕捉除去
されると同時に、ろ材３に生息する嫌気性微生物に触れ
ることによって、硝化液を脱窒したり、有機性汚濁物が
嫌気的に分解されて、脱窒槽１の上部を通り硝化槽２に
供給される。硝化槽２では、ろ材層中を上昇して原水中
の主にアンモニア性窒素が、硝化菌の働きによって硝酸
となり、一部は処理水として取り出し、残りは原水と混
合されて、脱窒槽１に循環供給される。
【０００８】このような処理運転時に、この発明に係る
ろ材３は、合成樹脂製の繊維ろ材であるので接触面積が
広く、汚水中の汚濁物を効率よく分解することができる
とともに、強度を有するので、原水圧によってその目が
押しつぶされることがなく、目詰りしにくく長時間の運
転が可能である。
【０００９】次に、このような運転をして、ろ材層が夾
雑物および有機物質の分解時や、脱窒あるいは硝化時に
生じた汚泥等で目詰まりしたときは、各々供給液を停止
して、各々個別に洗浄を行う。すなわち、供給管８から
の空気でろ材層をときほぐし攪拌し、同時に洗浄水を送
って、ろ材３から分離した夾雑物を槽外に排出する。そ
して、排出が完了したのち、原水を供給して運転を再開
する。このろ材３の洗浄操作においても、この発明のろ
材３は、合成樹脂製の繊維ろ材であるので、通水性が良
好でほぐし易く、強度を有するので、攪拌による損耗も
ないものである。
【００１０】また、上記ろ材３を攪拌するに当って、処
理槽１、２の中心部に立設したドラフトチューブ１ａ、
２ａは、その下部開口に設けた散気管８ａからの空気を
案内して槽内に洗浄水の上下循環流を形成して効率よく
ろ材３を攪拌洗浄することができるものである。また、
ろ材層高と水層高の比率を６５：３５〜５０：５０とし
たのは、この比率が上述のろ材攪拌洗浄時において、ろ
材３を最も効率的に攪拌流動させるろ材量と水量の割合
を見出したことによるものである。
【００１１】
【発明の効果】このように、この発明は、有機性汚水の
嫌気性処理装置において、装置およびろ材に工夫を施す
ことによって、効率のよい処理運転を可能とするととも
に、ろ材を洗浄再生するに当っても、小動力で再生を可
能としたもので、従来の流動床を用いる処理法や浮遊汚
泥法での処理法の難点を解決したものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating organic sewage such as sewage and a filter medium used in the apparatus. [0002] Hitherto, an anaerobic denitrification tank in the treatment of organic sewage as described above employs a fluidized bed type or a floating sludge method. [0003] An anaerobic biological treatment apparatus having a fixed bed using a particulate filter medium such as anthracite or ceramic having a low porosity tends to cause clogging at the surface layer of the filter medium due to the properties of sewage. It is not used because the filtration time is short, mudballs are easily generated and it is difficult to wash. Therefore, the anaerobic biological treatment apparatus must be of a fluidized bed type or a suspended sludge method. However, in the fluidized bed type or the suspended sludge method, a large amount of fluid energy is required and the packing density of the filter material becomes low, so that the tank itself becomes large. Further, in the fluidized bed type or the suspended sludge method, solids (SS) cannot be captured, and a large load of solids is applied to the subsequent nitrification tank, which requires frequent cleaning. Frequent washing of the nitrification tank leads to outflow of nitrifying bacteria having a slow growth rate. SUMMARY OF THE INVENTION [0004] The present invention provides a device for a filter medium, and the ratio of the filter medium layer height to the water layer height is 65:35.
By setting the ratio to ： 50: 50, a filter medium layer that is hardly clogged and easy to backwash is formed while capturing even fine SS. That is, a first filament having a fineness of 18 to 65 denier which is a heat-fusible conjugate fiber having a core of polypropylene and a sheath of polyethylene as a filter medium, and a second filament having a polypropylene fiber and a fineness of 3 to 10 denier. A web formed by blending a filament and a third filament having a fineness of 1.5 to 6 denier with a heat-fusible conjugate fiber having a core of polypropylene and a sheath of polyethylene is needle-punched to form a web, and the web on both sides is formed. A heat treatment is performed without smoothing the raised state to produce a cloth-shaped plate having a weight of 200 to 800 g / m 2 and a thickness of 2 to 8 mm. Those cut into corners were used.
Further, the ratio between the height of the filter medium layer and the height of the water layer is set to 65:35 to 50:
By setting it to 50, washing of the filter medium was facilitated. [0005] The above-mentioned cloth-shaped plate-shaped filter medium is a kind of non-woven fabric, and therefore has a high porosity and excellent adhesion of microorganisms. Therefore, the amount of microorganisms in the filter medium layer can be kept large. In addition, in order to prevent crushing by filtration pressure or gravity at the time of draining water, as described above, three
Different types of filaments are used. Since the cloth-shaped plate-shaped filter medium is densely packed and has a high porosity, the pressure loss due to clogging is small, so that even in anaerobic treatment, so-called surface filtration is not performed, and the filtration time is long. In the washing, the ratio of the filter medium layer height to the water layer height is set to 65:35 to 50:50, whereby the fluid is easily disturbed by air diffusion from below, and the trapped SS and excess sludge can be separated. . At this time, the amount of air is smaller than that of a nitrification tank using anthracite or ceramic filter media. Hereinafter, a wastewater treatment apparatus using a filter medium according to the present invention will be described with reference to the drawings. FIG. 1 shows a processing apparatus according to the present invention, which will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a denitrification tank in which the lower part is formed in an inverted cone shape and a settling portion is provided, 2 denotes a nitrification tank in which the lower portion is formed in an inverted cone shape and a settlement portion is provided, 3 denotes a denitrification tank and Filter media charged in the nitrification tank, 4 is a feed pipe for raw water, 5 is a pipe for taking out treated water, 6 is a circulation route for circulating a part of the nitrified water to the denitrification tank, and 7 is nitrifying the denitrified water. A pipe for supplying the tank 2 and a pipe 8 for supplying cleaning air are provided. [0007] Since the apparatus according to the present invention is configured as described above, raw water is mixed with the nitrification-treated water from the nitrification tank 2 and supplied to the denitrification tank 1. The mixed water supplied to the denitrification tank 1 rises in the filter medium layer to capture and remove fine impurities, and at the same time, contacts the anaerobic microorganisms inhabiting the filter medium 3 to denitrify the nitrification liquid. The organic pollutants are anaerobically decomposed and supplied to the nitrification tank 2 through the upper part of the denitrification tank 1. In the nitrification tank 2, the ammonia nitrogen mainly in the raw water rises in the filter medium layer and becomes nitric acid by the action of nitrifying bacteria, part of the nitric acid is taken out as treated water, and the rest is mixed with the raw water. Circulated supply. [0008] During such a treatment operation, the filter medium 3 according to the present invention is a synthetic resin fiber filter medium, so that it has a large contact area, can efficiently decompose pollutants in wastewater, and has strength. Therefore, the eyes are not crushed by the raw water pressure, and the eyes are hardly clogged, and long-time operation is possible. Next, when the filter medium layer is clogged with the sludge generated during the decomposition of impurities and organic substances or the denitrification or nitrification by performing such an operation, the supply liquid is stopped. Then, each washing is performed individually. That is, the filter medium layer is loosened and stirred with the air from the supply pipe 8, and at the same time, the washing water is sent to discharge the impurities separated from the filter medium 3 out of the tank. Then, after the discharge is completed, raw water is supplied to restart the operation. In the washing operation of the filter medium 3 as well, since the filter medium 3 of the present invention is a synthetic resin fiber filter medium, it has good water permeability, is easy to loosen, and has strength, so that it is not worn by stirring. In stirring the filter medium 3, a draft tube 1a, which is provided upright at the center of the processing tanks 1, 2,
Numeral 2a guides the air from the air diffuser 8a provided in the lower opening to form a vertical circulating flow of the washing water in the tank so that the filter medium 3 can be efficiently stirred and washed. Also,
The ratio of the filter medium layer height to the water layer height is set to 65:35 to 50:50 because this ratio is the ratio of the amount of the filter medium and the amount of water that most efficiently stirs and flows the filter medium 3 during the above-described filter medium stirring and washing. This is due to the finding. As described above, according to the present invention, in the anaerobic treatment apparatus for organic sewage, by devising the apparatus and the filter medium, an efficient treatment operation can be performed and the filter medium is washed. In the regeneration, it is possible to regenerate with a small power, and solves the drawbacks of the conventional treatment method using a fluidized bed or the suspended sludge treatment method.
【図面の簡単な説明】
【図１】この発明に係る排水の処理装置の系統図であ
る。
【符号の説明】
１ 脱窒槽
２ 硝化槽
３ ３材
８ａ 散気管BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system diagram of a wastewater treatment apparatus according to the present invention. [Description of Signs] 1 denitrification tank 2 nitrification tank 3 3 material 8a diffuser
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−96287（ＪＰ，Ａ) 特開 平９−215905（ＪＰ，Ａ) 特開 平１−317390（ＪＰ，Ａ) 特開 昭61−149085（ＪＰ，Ａ) 特開 昭62−91292（ＪＰ，Ａ) 特開 平８−33818（ＪＰ，Ａ) 特開 平10−216430（ＪＰ，Ａ) 特開 平12−24679（ＪＰ，Ａ) 特公 昭62−13043（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/34 C02F 3/06 - 3/10 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-96287 (JP, A) JP-A-9-215905 (JP, A) JP-A-1-317390 (JP, A) JP-A-61-1987 149085 (JP, A) JP-A-62-91292 (JP, A) JP-A-8-33818 (JP, A) JP-A-10-216430 (JP, A) JP-A-12-24679 (JP, A) JP-B-62-13043 (JP, B1) (58) Field surveyed (Int. Cl. 7 , DB name) C02F 3/34 C02F 3/06-3/10
Claims (1)
の処理水を硝化槽２に供給し、硝化槽２の処理水の一部
を脱窒槽１に返送するようにした循環式硝化脱窒装置に
おいて、脱窒槽１および硝化槽２に装入するろ材３が素
材が芯をポリプロピレン、鞘をポリエチレンとした熱融
着性複合繊維で繊度が１８〜６５デニールである第１フ
ィラメントと、素材がポリプロピレン繊維で繊度が３〜
１０デニールである第２フィラメントと、素材が芯をポ
リプロピレン、鞘をポリエチレンとした熱融着性複合繊
維で繊度が１．５〜６デニールである第３フィラメント
を混綿したウェッブをニードルパンチング法により布形
化し、両面のウェッブ起毛状態を平滑化することなく加
熱処理し、前記ウェッブの重量が２００〜８００ｇ／平
方メートル、厚みが２〜８ｍｍの布形化板状体を製作
し、この布形化板状体を３〜５ｍｍ角に裁断したもので
あることを特徴とする排水の処理装置。 (57) [Claims 1] A denitrification tank 1 and a nitrification tank 2 are arranged in parallel,
Filter water supplied to the denitrification tank 1 and the nitrification tank 2 in a circulating nitrification denitrification apparatus in which the treated water is supplied to the nitrification tank 2 and a part of the treatment water of the nitrification tank 2 is returned to the denitrification tank 1. 3 is prime
The material is heat-melted with polypropylene as the core and polyethylene as the sheath.
The first fiber having a fineness of 18 to 65 denier in the adhesive composite fiber.
The filament is made of polypropylene fiber and the fineness is 3 ~
The second filament, 10 denier, and the core
Heat-fusible composite fiber with polyethylene and sheath made of polypropylene
A third filament with a fiber fineness of 1.5 to 6 denier
Is made into a cloth by needle punching.
Without increasing the smoothness of the brushed web on both sides.
Heat treated, the weight of the web is 200-800 g / flat
Produces a 2 to 8 mm thick cloth-shaped plate
Then, this cloth-shaped plate is cut into 3 to 5 mm square.
An apparatus for treating wastewater, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30136097A JP3449525B2 (en) | 1997-11-04 | 1997-11-04 | Wastewater treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30136097A JP3449525B2 (en) | 1997-11-04 | 1997-11-04 | Wastewater treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11128986A JPH11128986A (en) | 1999-05-18 |
| JP3449525B2 true JP3449525B2 (en) | 2003-09-22 |
Family
ID=17895940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30136097A Expired - Fee Related JP3449525B2 (en) | 1997-11-04 | 1997-11-04 | Wastewater treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3449525B2 (en) |
-
1997
- 1997-11-04 JP JP30136097A patent/JP3449525B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11128986A (en) | 1999-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3107950B2 (en) | Biological treatment apparatus and water treatment method using the same | |
| US20060138048A1 (en) | Method for treating a contaminated fluid, system for treating a contaminated fluid, and method for making a biomass carrier suitable for treating a contaminated fluid | |
| JP3449525B2 (en) | Wastewater treatment equipment | |
| CN206553348U (en) | A kind of level stream sand filter | |
| JP3698297B2 (en) | Filter media cleaning and recycling equipment | |
| JP2904102B2 (en) | Sewage septic tank | |
| JP3054821B2 (en) | Aerobic filter bed tank for sewage purification tank | |
| JPH10128373A (en) | Biological treatment method | |
| JP3024638B2 (en) | Sewage treatment tank treatment method | |
| JPH11114319A (en) | Method of washing and regenerating filter medium bed | |
| JPH11128980A (en) | Apparatus for anaerobic treatment of waste water | |
| JP2000024679A (en) | Treating device of high concentration sewage | |
| JP3450877B2 (en) | Aerobic filter bed processing device with membrane module | |
| JP3468399B2 (en) | High-concentration wastewater treatment equipment | |
| JPH11128967A (en) | Apparatus for treating waste water | |
| JP3024639B2 (en) | Cleaning method of aerobic treatment tank in sewage purification tank | |
| JP3633001B2 (en) | Cleaning method for biological filtration device | |
| JP2000037698A (en) | Method and apparatus for biological treatment of sewage | |
| JP3244012B2 (en) | Activated sludge filtration device | |
| JP3072287B2 (en) | Operation method of aerobic filter bed tank for sewage purification tank | |
| JP3451611B2 (en) | Biological wastewater treatment equipment | |
| JP2820384B2 (en) | Method of cleaning filter media for water treatment / filtration equipment | |
| JPH02191595A (en) | Sewage treating device | |
| JPH11128613A (en) | High speed filter | |
| JP2584384B2 (en) | Method and apparatus for treating organic sewage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080711 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080711 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090711 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090711 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100711 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100711 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110711 Year of fee payment: 8 |
|
| LAPS | Cancellation because of no payment of annual fees |