JPS6366595B2 - - Google Patents
Info
- Publication number
- JPS6366595B2 JPS6366595B2 JP62315332A JP31533287A JPS6366595B2 JP S6366595 B2 JPS6366595 B2 JP S6366595B2 JP 62315332 A JP62315332 A JP 62315332A JP 31533287 A JP31533287 A JP 31533287A JP S6366595 B2 JPS6366595 B2 JP S6366595B2
- Authority
- JP
- Japan
- Prior art keywords
- packed bed
- water
- wastewater
- water flow
- 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.)
- Expired
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
- Biological Treatment Of Waste Water (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、下水、産業廃水、その他の汚水など
の有機性汚水を浄化処理するために好気性微生物
を生長させ、汚水中の汚濁物質を酸化分解させる
汚水の好気性生物処理方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention grows aerobic microorganisms to purify organic wastewater such as sewage, industrial wastewater, and other wastewater, and removes pollutants from the wastewater. The present invention relates to an aerobic biological treatment method for oxidatively decomposed wastewater.
一般に、汚水を浄化する有効な方法の一つとし
て知られている好気性生物処理方法には、活性汚
泥法、回転円板法、ハニカム材などを用いた接触
酸化法などが多用されている。
Generally, as an aerobic biological treatment method known as one of the effective methods for purifying wastewater, activated sludge method, rotating disk method, catalytic oxidation method using honeycomb material, etc. are frequently used.
従来では、この活性汚泥法は古くから行われて
おり最も普及している方式であるが、汚泥を返送
する必要があること、およびバルキングが生じる
こと、および負荷の変動に対して著しく処理状況
が影響されることなどの問題点がある。一方、回
転円板法と接触酸化法は汚泥を返送する必要はな
いが、回転円板法では防臭対策が必要となり、ま
た接触酸化法では汚泥が充填材が閉塞するなど、
それぞれ一長一短がある。しかも各種生物処理法
では沈降分離設備が不可欠であるため施設上の問
題点も持つている。
Conventionally, this activated sludge method has been used for a long time and is the most popular method, but it requires the sludge to be returned, bulking occurs, and the treatment status is significantly affected by load fluctuations. There are problems such as being influenced. On the other hand, the rotating disk method and the contact oxidation method do not require the return of sludge, but the rotating disk method requires odor control measures, and the contact oxidation method requires sludge to clog the filler.
Each has advantages and disadvantages. Furthermore, various biological treatment methods require sedimentation separation equipment, which also poses facility-related problems.
本発明は、これら従来の問題点を生じないよう
にして効率よく汚水の浄化処理ができ、しかも省
エネルギー対策にも効果的な結果が得られる安価
で処理コストも経済的な生物処理方法を提供する
ことを目的とするものである。 The present invention provides an inexpensive and economical biological treatment method that can efficiently purify sewage without causing these conventional problems, and also provides effective results for energy saving measures. The purpose is to
本発明は、微生物接触用粒状材からなる充填層
内に好気的状態下で汚水を流過させ汚水中の汚濁
物質を処理するに際し、酸素含有ガスを散気せし
めて前記充填層内好気的状態に保持させつつ汚水
を通水速度（LV）２〜10ｍ／ｈ，BOD容積負荷
25Kg／m3．ｄ以下で通水すると共に、この通水に
よつて通水抵抗値の増加分が１〜２ｍ―Aqにな
つた時期又は１〜２ｍ―Aqになると予想される
時期毎に定期的に前記充填層を洗浄することを特
徴とするものである。
In the present invention, when wastewater is passed through a packed bed made of granular material for contact with microorganisms under an aerobic condition to treat pollutants in the wastewater, an oxygen-containing gas is diffused to create an aerobic atmosphere in the packed bed. Water flow rate (LV) 2 to 10 m/h while maintaining the same condition, BOD volume load
25Kg/ m3 ． The above-mentioned filling is carried out periodically at a time when water is passed at a flow rate of d or less and the increase in water flow resistance due to this water flow reaches 1 to 2 m-Aq or is expected to increase to 1 to 2 m-Aq. It is characterized by cleaning the layer.
本発明においては、微生物接触用粒状材の充填
層は同時に処理水の過作用も有し、清澄度が良
好な処理水が得られる。 In the present invention, the packed bed of granular material for contact with microorganisms also has a superfluous effect on treated water, and treated water with good clarity can be obtained.
また、汚水の通水速度を前記のように規定した
理由は、LVが２ｍ／ｈ未満では充填層全体を有
効に利用できず、充填層の上層部のみしか生物処
理に関与しないため、この上部充填層に多大の生
物膜が付着し、その結果短時間で充填層の通水抵
抗が上昇し充填層の逆洗頻度が増大するからであ
り、またLVが10ｍ／ｈを超えると充填層にフラ
ツデイング現象が生じて通水処理が困難となるか
らであり、またLVが２ｍ／ｈ以上10ｍ／ｈ以下
にすれば充填層全体に生物膜が一様に付着生長し
効果的に処理を行うことができ、したがつて充填
層装置が小さくて済む利点がある。 In addition, the reason why the wastewater flow rate is specified as above is that if the LV is less than 2 m/h, the entire packed bed cannot be used effectively, and only the upper layer of the packed bed is involved in biological treatment. This is because a large amount of biofilm adheres to the packed bed, and as a result, the water flow resistance of the packed bed increases in a short time, increasing the frequency of backwashing of the packed bed.Also, when the LV exceeds 10 m/h, the water flow resistance of the packed bed increases. This is because a flooding phenomenon occurs, making water flow treatment difficult.Also, if the LV is set to 2 m/h or more and 10 m/h or less, biofilm will grow uniformly over the entire packed bed and treatment will be effective. Therefore, there is an advantage that the packed bed apparatus can be small.
一方、BOD容積負荷を25Kg／m3．ｄ以下とし
たのは、BOD容積負荷が25Kg／m3・ｄ以下であ
ると安定した効率の良い生物処理ができるのに対
し、これが25Kg／m3．ｄを超えると充填層に生物
膜が過剰に付着し、充填層通水時の圧力損失が著
しく大となるからであり、余り小さすぎると効果
的処理ができないので避けるべきである。 On the other hand, the BOD volume load is 25Kg/m 3 . The reason why the BOD volume load is 25Kg/m 3 .d or less is because stable and efficient biological treatment is possible when the BOD volume load is 25Kg/m 3 .d or less . If it exceeds d, excessive biofilm will adhere to the packed bed, resulting in a significantly large pressure loss when water is passed through the packed bed.If it is too small, effective treatment will not be possible, so it should be avoided.
本発明において使用する前記充填層は真比重
2.2以下、粒径２〜10mmの粒状材を用い、また
材として真比重2.2以上、粒径１〜５mmの粒状材
を用いるのが好ましいが、いずれかの粒状材のみ
からなる充填層として用いることもできる。 The packed bed used in the present invention has a true specific gravity
It is preferable to use a granular material with a particle size of 2.2 or less and a particle size of 2 to 10 mm, and it is preferable to use a granular material with a true specific gravity of 2.2 or more and a particle size of 1 to 5 mm, but it may be used as a packed bed consisting only of any of the granular materials. You can also do it.
本発明の一実施態様を図面によつて説明する
と、原水１は原水槽２から原水ポンプ３により原
水管４を経て処理槽５の流入部６に流入する。こ
の流入部６に至つた原水１は充填層７の微生物接
触用粒状材８の表面に付着した生物膜に接触し、
原水１中の汚濁物質が酸化分解される。前記充填
層７内は常に好気的状態に維持されるように、酸
素含有ガス例えば空気９がブロワ１０により、送
気配管１１を通つて、散気装置１２から送気され
ている。送気量は、通常、空気を用いた場合で
は、除去BOD量Kgあたり10Nm3で十分であり、
活性汚泥法処理方法等に比べ1/3〜1/5でよいし、
前記散気装置１２も充填層内を好気的状態下に保
たれる位置に選んで配置すればよい。例えば充填
層７内或いは充填層下端部又は充填層を支持する
ための下層部のうちいずれか少なくとも一つに配
置すればよい。
One embodiment of the present invention will be described with reference to the drawings. Raw water 1 flows from a raw water tank 2 into an inlet 6 of a treatment tank 5 via a raw water pipe 4 by a raw water pump 3. The raw water 1 that has reached this inflow portion 6 comes into contact with the biofilm attached to the surface of the microorganism contacting granular material 8 of the packed bed 7,
Contaminants in raw water 1 are oxidized and decomposed. An oxygen-containing gas such as air 9 is supplied by a blower 10 from an air diffuser 12 through an air supply pipe 11 so that the inside of the packed bed 7 is always maintained in an aerobic state. When air is used, the amount of air supplied is usually 10Nm3 per kilogram of BOD removed.
It is 1/3 to 1/5 compared to activated sludge treatment methods, etc.
The air diffuser 12 may also be selected and placed at a position where the inside of the packed bed is maintained under an aerobic condition. For example, it may be disposed within the filling layer 7, at the lower end of the filling layer, or at least one of the lower layer portion for supporting the filling layer.
また充填層７内で十分浄化された原水１は次い
で砂利などからなる支持層１３を通過し、多孔
板、多孔管などの透水性の支持体１４を経て処理
水１５として流出室１６に至る。流出室１６内の
処理水１５は処理水管１７を経て処理水槽１８に
流入する。 The raw water 1 sufficiently purified in the packed bed 7 then passes through a support layer 13 made of gravel, etc., passes through a permeable support 14 such as a perforated plate or a perforated pipe, and reaches an outflow chamber 16 as treated water 15. The treated water 15 in the outflow chamber 16 flows into the treated water tank 18 via the treated water pipe 17.
以上の説明は汚水の処理工程についての説明で
あるが、この処理工程を続けると通水時間の経過
と共に充填層の全過抵抗すなわち通水抵抗が
徐々に増大し、（原水１の性状、処理条件により
異なるが）６〜48時間経過すると通水困難に至
る。そこで通水困難になる以前、具体的には通水
抵抗値の増加分が１〜2m―Aqになつた時点又は
この増加分が１〜2m―Aqになると予想される時
期毎に定期的に洗浄工程を設ける必要がある。 The above explanation is about the sewage treatment process, but as this treatment process continues, the total overflow resistance of the packed bed, that is, the water flow resistance, gradually increases as the water flow time elapses. After 6 to 48 hours (depending on conditions), water flow becomes difficult. Therefore, before it becomes difficult to pass water, specifically, at the time when the increase in water flow resistance value reaches 1 to 2 m-Aq, or whenever this increase is expected to reach 1 to 2 m-Aq, periodically It is necessary to provide a cleaning process.
この洗浄工程は、弁２１を閉め原水ポンプ３を
停止し捨水弁１９を開とし、捨水管２０より充填
層７に貯留されている原水１を原水槽２にもど
す。処理槽５内の水位レベルが捨水口まで達した
後、空気逆洗を行う、送気量は1Nm3／m2．min
程度が適当である。そして約30秒程度空気逆洗を
行つた後、弁２２を閉じ送気を止め、今度は逆洗
ポンプ２５を作動させ、処理水槽１８内の処理水
１５により水逆洗を行う。水逆洗水量は、充填層
７の容積を20〜50％膨張させる程度の値とするこ
と、すなわち通常１〜２m3／m2．minとすること
が望ましい。また水逆洗時間は１〜５分が適当で
ある。 In this cleaning step, the valve 21 is closed, the raw water pump 3 is stopped, and the wastewater valve 19 is opened, and the raw water 1 stored in the packed bed 7 is returned to the raw water tank 2 through the wastewater pipe 20. After the water level in the treatment tank 5 reaches the wastewater outlet, air backwashing is performed at an air flow rate of 1Nm 3 /m 2 . min
The degree is appropriate. After performing air backwashing for about 30 seconds, the valve 22 is closed to stop the air supply, and the backwash pump 25 is operated this time to perform water backwashing using the treated water 15 in the treated water tank 18. The amount of backwash water should be set to a value that expands the volume of the packed bed 7 by 20 to 50%, that is, usually 1 to 2 m 3 /m 2 . It is desirable to set it to min. Further, the water backwashing time is suitably 1 to 5 minutes.
この水逆洗排水は逆洗排水管２６を通り逆洗排
水槽２７に貯留させる。このようにして捨水、空
気逆洗および水逆洗を２〜５回繰り返し行い洗浄
工程を終了する。 This water backwash wastewater passes through a backwash drain pipe 26 and is stored in a backwash drain tank 27. In this manner, water discard, air backwashing, and water backwashing are repeated 2 to 5 times to complete the cleaning process.
なお図中２３，２４は弁、２８はサイフオンブ
レーカである。 In the figure, 23 and 24 are valves, and 28 is a siphon breaker.
本発明は、微生物接触用粒状材からなる充填層
内に好気的状態下で汚水を流過させ汚水中の汚濁
物質を処理するに際し、酸素含有ガスを散気せし
めて前記充填層内を好気的状態に保持させつつ汚
水を通水速度（LV）２〜10ｍ／ｈ，BOD容積負
荷25Kg／m3．ｄ以下の条件下で汚水を通水すると
共に、この通水によつて通水抵抗値の増加分が１
〜２ｍ―Aqになつた時期又は１〜２ｍ―Aqにな
ると予想される時期毎に定期的に前記充填層を洗
浄するように処理したことにより、汚泥または水
を循環することなく処理でき、バルキングが生じ
ないし、しかも適宜に逆洗することができるので
汚泥の閉塞を防止できると共に、過作用もある
ことにより沈降分離部が不要となり、その上送気
による撹拌効果を期待しないため、BOD除去に
必要な送気量だけで効率よく運転でき、所定の粒
状材を充填層に用いてあるので、充填層での処理
に通水速度とBOD負荷との処理条件を保つて充
填層全体に生物膜が一様に付着生長することがで
き、この付着が希薄になつたり、過剰なつたりす
ることなく安定した生物処理が可能となり、安定
した効率の良い生物処理ができるし充填層通水時
の圧力損失も少なく著しく経済的に処理でき、稼
動率を低下させることなく効率よく汚水の浄化処
理が可能であり、従来の問題点をも解決でき、ま
た言うまでもなくBOD除去のみならずNH4 +―Ｎ
を含有する汚水に対しても硝酸菌の作用により
NH4 +―Ｎの除去が可能であり、処理コストも大
幅に節減できるなど多大の効果がある。
In the present invention, when wastewater is passed through a packed bed made of granular material for contact with microorganisms under an aerobic condition and polluted substances in the wastewater are treated, an oxygen-containing gas is diffused to favorably flow inside the packed bed. Water flow rate (LV) of 2 to 10 m/h while maintaining the sewage in an air condition, BOD volume load 25 kg/m 3 . The wastewater is passed under the conditions below d, and the increase in water flow resistance due to this water flow is 1
By cleaning the packed bed regularly every time it reaches ~2 m-Aq or when it is expected to reach 1-2 m-Aq, it can be treated without circulating sludge or water, and bulking It is possible to prevent sludge from clogging because it can be backwashed as needed, and because there is overaction, there is no need for a sedimentation separation section.Furthermore, since the agitation effect of air supply is not expected, it is effective for BOD removal. It can be operated efficiently with only the required amount of air supply, and because the specified granular material is used in the packed bed, the processing conditions of water flow rate and BOD load can be maintained for processing in the packed bed, and a biofilm is formed over the entire packed bed. This allows stable biological treatment to be carried out without thinning or excessive dripping of this attachment, allowing for stable and efficient biological treatment, and reducing the pressure when water is passed through the packed bed. It can be processed extremely economically with little loss, it can efficiently purify wastewater without reducing the operating rate, it can solve conventional problems, and it goes without saying that it not only removes BOD but also removes NH 4 + -N.
Due to the action of nitric acid bacteria, even sewage containing
It is possible to remove NH 4 + -N and has great effects, such as greatly reducing processing costs.
図面は本発明の一実施態様を示す系統説明図で
ある。
１…原水、２…原水槽、３…原水ポンプ、５…
処理槽、７…充填層、１０…ブロワ、１２…散気
装置、１３…支持層、１５…処理水、１６…流出
室、１８…処理水槽、２５…逆洗ポンプ、２７…
逆洗排水槽。
The drawing is a system explanatory diagram showing one embodiment of the present invention. 1...Raw water, 2...Raw water tank, 3...Raw water pump, 5...
Treatment tank, 7... Filled bed, 10... Blower, 12... Diffuser, 13... Support layer, 15... Treated water, 16... Outflow chamber, 18... Treated water tank, 25... Backwash pump, 27...
Backwash drain tank.
Claims (1)
的状態下で汚水を流過させ汚水中の汚濁物質を処
理するに際し、酸素含有ガスを散気せしめて前記
充填層内を好気的状態に保持させつつ汚水を通水
速度（LV）２〜10ｍ／ｈ，BOD容積負荷25Kg／
m3．ｄ以下で通水すると共に、この通水によつて
通水抵抗値の増加分が１〜２ｍ―Aqになつた時
期又は１〜２ｍ―Aqになると予想される時期毎
に定期的に前記充填層を洗浄することを特徴とす
る汚水の好気性生物処理方法。 ２ 前記好気的状態が充填層に空気を除去BOD
量Kg当り約10Nm3を送気されて維持されるもので
ある特許請求の範囲第１項記載の処理方法。[Scope of Claims] 1. When wastewater is passed through a packed bed made of granular material for contact with microorganisms under aerobic conditions to treat pollutants in the wastewater, an oxygen-containing gas is diffused into the packed bed. Water flow rate (LV) 2 to 10 m/h while maintaining internal aerobic conditions, BOD volume load 25 kg/
m3 ． The above-mentioned filling is carried out periodically at a time when water is passed at a flow rate of d or less and the increase in water flow resistance due to this water flow reaches 1 to 2 m-Aq or is expected to increase to 1 to 2 m-Aq. An aerobic biological treatment method for sewage characterized by washing a layer. 2. The aerobic condition removes air into the packed bed BOD
The treatment method according to claim 1, wherein approximately 10 Nm 3 of air per kg is blown and maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62315332A JPS63158193A (en) | 1987-12-15 | 1987-12-15 | Aerobic biological treatment of sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62315332A JPS63158193A (en) | 1987-12-15 | 1987-12-15 | Aerobic biological treatment of sewage |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16968079A Division JPS5691889A (en) | 1979-12-27 | 1979-12-27 | Aerobic biological disposal of contaminated water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63158193A JPS63158193A (en) | 1988-07-01 |
| JPS6366595B2 true JPS6366595B2 (en) | 1988-12-21 |
Family
ID=18064136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62315332A Granted JPS63158193A (en) | 1987-12-15 | 1987-12-15 | Aerobic biological treatment of sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63158193A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7297275B2 (en) | 2001-11-28 | 2007-11-20 | Ebara Corporation | Biomembrane filtration apparatus and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3853752A (en) * | 1970-12-02 | 1974-12-10 | J Tymoszczuk | Process and apparatus for treating wastes by a combined activated sludge and biological filter bed |
| JPS4912646A (en) * | 1972-05-17 | 1974-02-04 | ||
| CA1033669A (en) * | 1972-06-28 | 1978-06-27 | Allen Clamen | Control of aerobic biological growth in activated carbon waste water treatment |
| JPS5548872B2 (en) * | 1974-05-14 | 1980-12-09 | ||
| JPS5491960A (en) * | 1977-12-29 | 1979-07-20 | Omnium Assainissement | Method of biologically purifying water |
| JPS5412754A (en) * | 1978-07-05 | 1979-01-30 | Canon Inc | Photosensitive screen |
-
1987
- 1987-12-15 JP JP62315332A patent/JPS63158193A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63158193A (en) | 1988-07-01 |
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