JP2000070990A - Method for removing nitrogen and suspended matter in wastewater and removal system therefor - Google Patents
Method for removing nitrogen and suspended matter in wastewater and removal system thereforInfo
- Publication number
- JP2000070990A JP2000070990A JP24933598A JP24933598A JP2000070990A JP 2000070990 A JP2000070990 A JP 2000070990A JP 24933598 A JP24933598 A JP 24933598A JP 24933598 A JP24933598 A JP 24933598A JP 2000070990 A JP2000070990 A JP 2000070990A
- Authority
- JP
- Japan
- Prior art keywords
- wastewater
- filter
- backwash
- feed
- hydrogen donor
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 49
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 37
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000852 hydrogen donor Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 12
- 238000011001 backwashing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 50
- 239000010865 sewage Substances 0.000 abstract description 6
- 230000033116 oxidation-reduction process Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 239000004576 sand Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 241000894007 species Species 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000000227 bioadhesive Substances 0.000 description 1
- 238000009301 bioretention Methods 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/22—Activated sludge processes using circulation pipes
- C02F3/226—"Deep shaft" processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/107—Inorganic materials, e.g. sand, silicates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Filtration Of Liquid (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水、し尿などの
生活廃水、産業廃水、埋立地浸出水、またはこれら廃水
の二次処理水等の窒素化合物や懸濁物質（ＳＳ）を含む
廃水中から、窒素成分及びＳＳを除去する方法及びそれ
らの除去システムに関する。The present invention relates to wastewater containing nitrogen compounds and suspended solids (SS) such as domestic wastewater such as sewage and human waste, industrial wastewater, leachate from landfills, and secondary treatment water of these wastewaters. And a system for removing nitrogen components and SS from the wastewater.
【０００２】[0002]
【従来の技術】下水などの廃水中に含まれる窒素成分の
除去には、主に廃水を硝化菌と脱窒菌とに順次作用させ
て生物的に分解、除去する方法が用いられている。この
うち代表的な窒素除去プロセスとして、廃水の二次処理
を含め硝化、脱窒の機能を分離して処理する硝化・脱窒
システム、硝化液を脱窒工程に循環する脱窒・硝化シス
テムなどのプロセスがあげられる。また、下水の二次処
理水などを処理するために、既設の処理装置の後段に新
しく固定床生物膜ろ過装置を設け、二次処理水に水素供
与体としてメタノールを添加し脱窒処理を行う方法も広
く実施されている。2. Description of the Related Art In order to remove nitrogen components contained in wastewater such as sewage, a method of mainly decomposing and biologically removing wastewater by sequentially acting on nitrifying bacteria and denitrifying bacteria is used. Typical nitrogen removal processes include nitrification and denitrification systems that separate and treat the functions of nitrification and denitrification, including secondary treatment of wastewater, and denitrification and nitrification systems that circulate the nitrification solution to the denitrification process. Process. In addition, in order to treat secondary effluent such as sewage, a new fixed-bed biofilm filtration device is newly installed after the existing treatment device, and methanol is added to the secondary effluent as a hydrogen donor to perform denitrification. The method is also widely practiced.
【０００３】[0003]
【発明が解決しようとする課題】ところで、前記の窒素
成分除去プロセスは、運転コストは低く押さえられるが
長い処理滞留時間を要する割に窒素除去率がそれ程高く
ないとか、窒素除去率は高いが過剰な生物膜が形成され
て閉塞しやすく、剥離した生物膜が処理水中に混入する
とか、ろ床の閉塞はないが逆に生物保持量が小さいな
ど、いずれも一長一短である。一方、移床式上向流砂ろ
過器は、ろ床での生物保持が困難であり、通常のろ過速
度では十分な窒素除去が行えない。本発明者は、主に下
水の二次処理水などを対象に効率のよい脱窒及び同時に
懸濁物質を除去する方法とそのシステムを研究した結
果、本発明を完成することができた。By the way, in the above-mentioned nitrogen component removing process, the operating cost is kept low, but the nitrogen removing rate is not so high for a long processing residence time, or the nitrogen removing rate is high but excessive. The biofilm is easily formed and clogged, and the separated biofilm is mixed in the treated water. The filter bed is not clogged but the bioretention is small. On the other hand, the moving bed type upward flow sand filter has difficulty in retaining organisms in the filter bed, and cannot perform sufficient nitrogen removal at a normal filtration speed. The present inventor has studied a method and a system for efficiently denitrifying and simultaneously removing suspended solids, mainly for secondary sewage water and the like, and as a result, has completed the present invention.
【０００４】[0004]
【課題を解決するための手段】本発明の要点を図面を参
照して説明する。本発明は、供給廃水に水素供与体を添
加して、ろ材連続逆洗機能を有する移床式上向流ろ過装
置１に送入し、さらにろ過装置１から排出される逆洗排
水の一部を供給廃水中に返送して添加することにより、
供給廃水中の窒素成分を生物的に分解し、かつ懸濁物質
をろ過して除去することを特徴とする廃水中の窒素およ
び懸濁物質の除去方法を提供する。水素供与体としては
メタノールが好適である。また、本発明は、主要部分が
移床式上向流ろ過装置１、ろ過装置１に供給する廃水に
水素供与体を供給する装置２、及びろ過装置１から排出
される逆洗排水を供給廃水側に返送して添加する逆洗排
水返送装置３の３装置からなることを特徴とする廃水の
脱窒及び懸濁物質の除去システムを提供する。The gist of the present invention will be described with reference to the drawings. In the present invention, a hydrogen donor is added to a feed wastewater, and is fed into a moving bed type upflow filtration device 1 having a filter material continuous backwashing function. Is returned to the feed wastewater and added,
Disclosed is a method for removing nitrogen and suspended substances in wastewater, which comprises biologically decomposing nitrogen components in feed wastewater and removing suspended substances by filtration. Methanol is preferred as the hydrogen donor. In addition, the present invention provides a transfer-type upflow filtration device 1 whose main part is a device 2 for supplying a hydrogen donor to wastewater supplied to the filtration device 1, and a backwash wastewater discharged from the filtration device 1 for supplying wastewater to the wastewater. A denitrification system for wastewater and a system for removing suspended solids, comprising three units of a backwashing wastewater return unit 3 which is added back to the side.
【０００５】[0005]
【発明の実施の形態】本発明を図面を参照し実施形態例
をあげながら具体的に説明する。図１は本発明の一実施
形態例を示すフローシートである。以下、本発明におい
て処理対象とする下水、し尿などの生活廃水、産業廃
水、埋立地浸出水、またはこれら廃水の二次処理水等の
窒素化合物や懸濁物質（ＳＳ）を含む廃水を「原水」と
いう。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described with reference to the drawings and embodiments. FIG. 1 is a flow sheet showing an embodiment of the present invention. Hereinafter, wastewater containing nitrogen compounds and suspended solids (SS), such as sewage, human waste, industrial wastewater, landfill leachate, or secondary wastewater of these wastewaters to be treated in the present invention is referred to as “raw water”. "
【０００６】まず、本発明において用いられる前記３装
置のうちの移床式上向流ろ過装置１について簡単に説明
する。ろ過装置１は、ろ過操作を実施しつつ同時にろ材
を連続的に洗浄することのできる連続式ろ過装置であっ
て、従来から廃水処理等に広く使用されている。この種
のろ過装置については、特公昭５６−５１８０８号公報
などに記載されている。本発明に用いる場合、ろ材とし
て生物付着能の高いものを用いると逆洗時に十分なろ材
の洗浄が行えず、結果として処理水中に剥離した生物膜
が混入するトラブルが考えられる。本発明においては、
脱窒に関与する生物はろ材間の空隙に保持される形とな
るため、ろ過性能を考慮すれば通常本装置で用いられて
いる砂をろ材とすることが望ましい。First, the outflow type upflow filtration device 1 of the three devices used in the present invention will be briefly described. The filtration device 1 is a continuous filtration device that can continuously and simultaneously wash a filter medium while performing a filtration operation, and has been widely used for wastewater treatment and the like. This type of filtration device is described in JP-B-56-51808 and the like. In the case of using in the present invention, if a material having a high bioadhesive ability is used as the filter material, it is not possible to sufficiently wash the filter material at the time of back washing, and as a result, a problem that a biofilm peeled into the treated water may be considered. In the present invention,
Since the organisms involved in denitrification are held in the gaps between the filter media, it is desirable to use the sand normally used in the present apparatus as the filter media in consideration of the filtration performance.
【０００７】図１に示した実施形態例において、ろ過装
置１の本体は、筒状の胴部４と逆コーン状の底部５とか
らなる槽に、前記ろ材を充填してろ過床６とし、原水供
給管７により供給される原水を、ろ過床の下部に設けた
原水分配管８から供給して上向きにろ過床６内を通過さ
せ、ろ過した処理水は上部から集水トラフ９にオーバフ
ローさせ処理水排出管１０を通して系外に導出するもの
である。一方、ろ材は、ろ過床６からコーン状部分５へ
と下降し、最下部のコーン頂点にあたる部分の空気吹込
管１１の先端１２から吹込まれる空気に伴われ、周辺の
水とともエアリフト管１３を上昇しながら空気と水とで
混合逆洗される。さらにろ材は、分離器１４で水とは分
離され、ろ材はサンドウォッシャー１５を下降し上昇す
るろ過水と対向流で逆洗され、再びろ過床６上部へと戻
される。ろ材と分離したエアリフト管１３およびサンド
ウォッシャー１５からの逆洗水は、多量の生物体を含ん
で酸化還元電位が低下しており、逆洗排水管１６により
ろ過装置１外に導出される。本発明が比較的小量の原水
の脱窒・ＳＳ除去処理を対象とする場合には、単一ろ過
槽を使用するが、大量の原水を処理する際には複数の単
位ろ過槽（モジュール）をまとめ、マルチモジュール型
として利用することができる。In the embodiment shown in FIG. 1, the main body of the filtration device 1 is provided with a filter bed 6 by filling the filter medium into a tank having a cylindrical body 4 and an inverted cone-shaped bottom 5. Raw water supplied by a raw water supply pipe 7 is supplied from a raw water pipe 8 provided at a lower portion of the filter bed and passes upward through the filter bed 6, and the filtered treated water overflows from above into a collecting trough 9. It is led out of the system through the treated water discharge pipe 10. On the other hand, the filter medium descends from the filtration bed 6 to the cone-shaped portion 5 and is accompanied by the air blown from the tip 12 of the air blowing pipe 11 in the portion corresponding to the apex of the lowermost cone. The mixture is backwashed with air and water while rising. Further, the filter medium is separated from the water by the separator 14, and the filter medium is backwashed by the counterflow with the filtered water descending and rising down the sand washer 15, and is returned to the upper part of the filter bed 6 again. The backwash water from the air lift pipe 13 and the sand washer 15 separated from the filter medium contains a large amount of organisms and has a reduced oxidation-reduction potential, and is led out of the filtration device 1 by the backwash drain pipe 16. When the present invention is intended for denitrification / SS removal treatment of relatively small amount of raw water, a single filtration tank is used. However, when a large amount of raw water is treated, a plurality of unit filtration tanks (modules) are used. And can be used as a multi-module type.
【０００８】ろ過装置１に供給される原水は、あらかじ
め水素供与体供給装置２により、本実施形態例では原水
供給管７において水素供与体供給管１７から水素供与体
を添加される。水素供与体としては、菌種に応じてアル
コール類、カルボン酸類等の有機物質が考えられるが、
菌種が適合すれば実用上メタノールが好適である。必要
な添加量は、一般には メタノール濃度（ｍｇ／ｌ）＝２．４７×ＮＯ3 −Ｎ
（ｍｇ／ｌ）＋１．５３×ＮＯ2 −Ｎ（ｍｇ／ｌ）＋
０．８７×ＤＯ（ｍｇ／ｌ） で表される。通常、硝酸性窒素の３倍のメタノール濃度
で添加すればよい。また、加えてリンを除去したい場合
には、凝集剤としてポリ塩化アルミニウムや塩化第２鉄
を添加すればよい。The raw water supplied to the filtration device 1 is preliminarily added with a hydrogen donor from the hydrogen donor supply pipe 17 in the raw water supply pipe 7 in this embodiment by the hydrogen donor supply apparatus 2. As the hydrogen donor, organic substances such as alcohols and carboxylic acids are considered depending on the bacterial species,
If the bacterial species is compatible, methanol is practically suitable. The required amount of addition is generally methanol concentration (mg / l) = 2.47 × NO 3 −N
(Mg / l) + 1.53 × NO 2 −N (mg / l) +
It is expressed as 0.87 × DO (mg / l). Normally, it may be added at a concentration of methanol three times that of nitrate nitrogen. If phosphorus is to be additionally removed, polyaluminum chloride or ferric chloride may be added as a coagulant.
【０００９】本発明では、さらにろ過装置１の逆洗排水
を逆洗排水返送管１８を経て原水に添加する。すなわ
ち、ろ材洗浄後、ろ過装置１外に排出された逆洗排水
は、逆洗排水管１６を経て排出されるが、そのうちの一
部が逆洗排水返送管１８を経て原水供給側に返送され、
本実施形態例では原水供給管７において原水に混合され
る。逆洗排水の返送方法は逆洗排水返送用ポンプ１９を
用い、直接逆洗排水をポンプアップする方法、一旦受槽
または水槽を設け、そこからポンプアップする方式、原
水ポンプによるエゼクタ方式等を採用することができ
る。また、前記の添加物の原水への添加順、原水との混
合手段等に特別の制限はない。In the present invention, the backwash wastewater from the filtration device 1 is further added to the raw water via the backwash wastewater return pipe 18. That is, after washing the filter medium, the backwash drainage discharged to the outside of the filtration device 1 is discharged through the backwash drainage pipe 16, and a part of it is returned to the raw water supply side through the backwash drainage return pipe 18. ,
In this embodiment, the raw water is mixed with the raw water in the raw water supply pipe 7. The method of returning the backwash drainage uses a backwash drain return pump 19, a method of directly pumping up the backwash drainage, a method of once providing a receiving tank or a water tank and pumping up from there, an ejector method using a raw water pump, and the like. be able to. Further, there is no particular limitation on the order of adding the above-mentioned additives to the raw water, mixing means with the raw water, and the like.
【００１０】さて、前記の水素供与体および逆洗排水を
含む原水は、原水供給管７を経て原水分配管８からろ過
床６下部に送入される。原水がろ過床６内を上昇する間
に、添加された逆洗排水中の脱窒菌（生物）は、ろ材に
付着、保持され、脱窒に必要な水素を水素供与体から得
て、硝酸性窒素を生物的に分解、脱窒して増殖する。他
方原水中のＳＳはろ材によりろ過除去され、目的の処理
が遂行される。ろ材の逆洗は処理工程と並行して連続的
に行われる。ろ過装置１底部近くの生物を多く保持した
ろ材は、空気吹込管１１から送られた空気によって水と
ともにエアリフト管１３に吸入されて管内を上昇する過
程で同伴する水と空気とにより逆洗され、分離器１４内
に排出されて水及び空気と分離され、さらにサンドウォ
ッシャー１５を下降する過程で上昇水により逆洗され
る。前記の逆洗の過程でＳＳ及びろ材に付着していた生
物は水側に移行し、ろ材はろ過性能を回復する。排出さ
れる逆洗排水は生物量が豊富で酸化還元電位が低い。本
発明においてはその一部が、逆洗排水返送装置により原
水中に返送される。原水に対する返送逆洗排水の容積割
合（返送率）は、１〜１５０％、好ましくは５〜１００
％である。返送率は、原水の性状により逆洗排水中の生
物量等が異なるために、対象水ごとに最適値が異なる。The raw water containing the hydrogen donor and the backwash wastewater is sent from the raw water pipe 8 to the lower part of the filtration bed 6 through the raw water supply pipe 7. While the raw water rises in the filtration bed 6, the denitrifying bacteria (organisms) in the added backwash drainage adhere to and are retained by the filter medium, obtain the hydrogen necessary for denitrification from the hydrogen donor, and obtain nitric acid. Proliferates by biologically decomposing and denitrifying nitrogen. On the other hand, the SS in the raw water is filtered and removed by the filter medium, and the intended treatment is performed. Backwashing of the filter medium is performed continuously in parallel with the treatment process. The filter medium holding a large amount of organisms near the bottom of the filtration device 1 is sucked into the air lift tube 13 together with water by the air sent from the air blowing tube 11 and backwashed by the water and air entrained in the process of rising in the tube, The water is discharged into the separator 14 to be separated from water and air, and further backwashed by rising water while descending the sand washer 15. The organisms that have adhered to the SS and the filter medium in the process of the backwash migrate to the water side, and the filter medium recovers the filtration performance. The discharged backwash wastewater is rich in biomass and has a low oxidation-reduction potential. In the present invention, part of the water is returned to the raw water by the backwash wastewater return device. The volume ratio (return rate) of the backwash wastewater returned to the raw water is 1 to 150%, preferably 5 to 100%.
%. The optimal value of the return rate differs for each target water because the biomass and the like in the backwash wastewater vary depending on the properties of the raw water.
【００１１】[0011]
【発明の効果】本発明窒素および懸濁物質の除去方法及
びそのシステムにおいては、ろ過操作とろ材の逆洗操作
とが並行して連続的に進められるので、生物膜の発生に
よるろ過床の閉塞がなく、長期連続操業を実施できる。
また、ろ過床内で増殖した生物が豊富に含まれ酸化還元
電位の低い逆洗排水が原水中に返送されるので、原水が
ろ過床に到達するまでの間にも脱窒が進行し、さらにろ
過床においても生物量が増加して脱窒速度を増大する効
果がある。さらに逆洗排水中の生物をろ床内に返送・保
持できるため、生物の馴致期間を短縮でき、また逆洗排
水中のＢＯＤを水素供与体として利用できることから、
添加する水素供与体量を低減するすることができる。In the method and system for removing nitrogen and suspended matter according to the present invention, the filtration operation and the backwashing operation of the filter medium are continuously performed in parallel, so that the filter bed is clogged due to generation of biofilm. And long-term continuous operation.
In addition, since the backwash wastewater with a low oxidation-reduction potential is returned to the raw water, which is rich in organisms grown in the filter bed, denitrification proceeds even before the raw water reaches the filter bed. The filter bed also has the effect of increasing the biomass and increasing the denitrification rate. In addition, since the organisms in the backwash wastewater can be returned and retained in the filter bed, the time required for the organisms to acclimate can be shortened, and the BOD in the backwash wastewater can be used as a hydrogen donor.
The amount of the hydrogen donor to be added can be reduced.
【図１】 本発明の一実施形態例を示すフローシートFIG. 1 is a flow sheet showing an embodiment of the present invention.
１：移床式上向流ろ過装置 ２：水素供与体供給装置 ３：逆洗排水返送装置 ４：ろ過装置の本体胴部
５：ろ過装置本体底部 ６：ろ過床 ７：原水供給管 ８：原水分配管
９：集水トラフ １０：処理水排出管 １１：空気吹込管 １２：空
気吹込管先端 １３：エアリフト管 １４：分離器 １５：サンド
ウォッシャー １６：逆洗排水管 １７：水素供与体供給管 １
８：逆洗排水返送管 １９：逆洗排水返送用ポンプ1: Up-flow filtration device with moving bed 2: Hydrogen donor supply device 3: Backwash wastewater return device 4: Main body of the filtration device
5: Filter unit bottom 6: Filtration bed 7: Raw water supply pipe 8: Raw water piping
9: Water collecting trough 10: Treated water discharge pipe 11: Air blow pipe 12: Air blow pipe tip 13: Air lift pipe 14: Separator 15: Sand washer 16: Backwash drain pipe 17: Hydrogen donor supply pipe 1
8: Backwash drainage return pipe 19: Backwash drainage return pump
Claims (3)
続逆洗機能を有する移床式上向流ろ過装置に送入し、さ
らに前記ろ過装置から排出される逆洗排水の一部を返送
して前記供給廃水中に添加することにより、供給廃水中
の窒素成分を生物的に分解し、かつ懸濁物質をろ過して
除去することを特徴とする廃水中の窒素および懸濁物質
の除去方法。1. A backwashing wastewater discharged from the filtration device, wherein a hydrogen donor is added to the supplied wastewater, and the hydrogen donor is fed to a moving bed type upward flow filtration device having a continuous backwashing function for a filter medium. And nitrogen is added to the feed wastewater to biologically decompose the nitrogen component in the feed wastewater and remove the suspended matter by filtration. Removal method.
とする請求項１記載の廃水中の窒素および懸濁物質の除
去方法。2. The method according to claim 1, wherein the hydrogen donor is methanol.
供給する廃水に水素供与体を供給する装置と、前記ろ過
装置から排出される逆洗排水を返送して供給廃水中に添
加する装置とからなることを特徴とする廃水中の窒素お
よび懸濁物質の除去システム。3. A transfer-type upward-flow filtration device, a device for supplying a hydrogen donor to wastewater to be supplied to the filtration device, and a backwash wastewater discharged from the filtration device to be returned to supply wastewater. A system for removing nitrogen and suspended solids in wastewater, comprising a device for adding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24933598A JP3607088B2 (en) | 1998-09-03 | 1998-09-03 | Method and system for continuous simultaneous removal of nitrogen and suspended solids from wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24933598A JP3607088B2 (en) | 1998-09-03 | 1998-09-03 | Method and system for continuous simultaneous removal of nitrogen and suspended solids from wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000070990A true JP2000070990A (en) | 2000-03-07 |
| JP3607088B2 JP3607088B2 (en) | 2005-01-05 |
Family
ID=17191496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24933598A Expired - Lifetime JP3607088B2 (en) | 1998-09-03 | 1998-09-03 | Method and system for continuous simultaneous removal of nitrogen and suspended solids from wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3607088B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002533218A (en) * | 1998-12-29 | 2002-10-08 | パクエス バイオ システムズ ベスローテン フェンノートシャップ | Method of treating wastewater containing heavy metals |
| JP2006272082A (en) * | 2005-03-28 | 2006-10-12 | Takuma Co Ltd | Ultrahigh-level method for treating water and water treatment system to be used therein |
| JP2013027821A (en) * | 2011-07-28 | 2013-02-07 | Takuma Co Ltd | Sand filtration device, and method for producing filter sand therefor |
| EP2857077A3 (en) * | 2013-10-02 | 2015-12-02 | John H. Reid | Upflow continuous backwash filter |
| CN106379993A (en) * | 2016-10-26 | 2017-02-08 | 桂林理工大学 | Continuous back washing denitrification deep bed filter device for treating tail water from sewage plant |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849848B (en) * | 2012-09-26 | 2014-03-05 | 北京市环境保护科学研究院 | Internal circulation biological filter reactor and sewage treatment method |
-
1998
- 1998-09-03 JP JP24933598A patent/JP3607088B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002533218A (en) * | 1998-12-29 | 2002-10-08 | パクエス バイオ システムズ ベスローテン フェンノートシャップ | Method of treating wastewater containing heavy metals |
| JP2006272082A (en) * | 2005-03-28 | 2006-10-12 | Takuma Co Ltd | Ultrahigh-level method for treating water and water treatment system to be used therein |
| JP2013027821A (en) * | 2011-07-28 | 2013-02-07 | Takuma Co Ltd | Sand filtration device, and method for producing filter sand therefor |
| EP2857077A3 (en) * | 2013-10-02 | 2015-12-02 | John H. Reid | Upflow continuous backwash filter |
| US10017406B2 (en) | 2013-10-02 | 2018-07-10 | John H. Reid | Upflow continuous backwash filter |
| US10160678B2 (en) | 2013-10-02 | 2018-12-25 | John H. Reid | Process for operating an upflow continuous backwash filter |
| CN106379993A (en) * | 2016-10-26 | 2017-02-08 | 桂林理工大学 | Continuous back washing denitrification deep bed filter device for treating tail water from sewage plant |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3607088B2 (en) | 2005-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3709364A (en) | Method and apparatus for denitrification of treated sewage | |
| US6790347B2 (en) | Batch style wastewater treatment apparatus using biological filtering process and wastewater treatment method using the same | |
| US4159945A (en) | Method for denitrification of treated sewage | |
| JP2000070990A (en) | Method for removing nitrogen and suspended matter in wastewater and removal system therefor | |
| JP3095952B2 (en) | Simultaneous treatment of kitchen wastewater and garbage | |
| JPH0461993A (en) | Method and apparatus for biological nitration and denitrification of organic polluted water | |
| JP2003010871A (en) | Sewage treatment apparatus and operating method thereof | |
| KR100547463B1 (en) | Nitrogen removal system in aeration tank using sulfur packed MBR reactor | |
| JP2574649B2 (en) | Aerobic livestock waste septic tank | |
| KR100456346B1 (en) | The sewage and waste water treatment plant by microorganism contact oxidation | |
| KR100244536B1 (en) | Device for removing high concentration of organism and nitrogen using biological membrane | |
| KR100304404B1 (en) | Dense wastewater treatment method by fixed biofilm and continuous backwash filtration | |
| JP2520798B2 (en) | Method and apparatus for biological dephosphorization of organic wastewater | |
| JP3919455B2 (en) | Advanced denitrification method for waste water | |
| KR100458908B1 (en) | Dirty and waste water purifying system | |
| JP4865997B2 (en) | Operation method of sewage treatment apparatus and sewage treatment apparatus | |
| KR20250179250A (en) | Separation step using contact oxidation method, wastewater advanced treatment method | |
| JP4092848B2 (en) | Waste water treatment equipment | |
| JP2007196081A (en) | Wastewater treatment system and toilet device | |
| KR19990083922A (en) | Processing mothod and processing system for excretions of animals | |
| JP2006055849A (en) | Apparatus and method for treating organic waste water | |
| KR100521722B1 (en) | Method of wastewater treatment using internal recyclein and step feeding | |
| KR100305361B1 (en) | Household sewage treatment device | |
| KR100458907B1 (en) | Dirty and waste water purifying system | |
| KR20020029267A (en) | The method to remove nitrogen and phosphorous from waste water utilizing waste material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20031222 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040224 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040423 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040622 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040726 |
|
| A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20040830 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20041005 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20041006 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071015 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081015 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081015 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091015 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101015 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111015 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111015 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121015 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121015 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131015 Year of fee payment: 9 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |