JP3350424B2 - Oil-containing wastewater treatment apparatus and its treatment method - Google Patents
Oil-containing wastewater treatment apparatus and its treatment methodInfo
- Publication number
- JP3350424B2 JP3350424B2 JP34297797A JP34297797A JP3350424B2 JP 3350424 B2 JP3350424 B2 JP 3350424B2 JP 34297797 A JP34297797 A JP 34297797A JP 34297797 A JP34297797 A JP 34297797A JP 3350424 B2 JP3350424 B2 JP 3350424B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- wastewater
- treatment
- containing wastewater
- ultrafiltration
- 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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、植物油脂精製工程
から排出される排水の処理装置、更に詳しくはｎ−ヘキ
サン可溶分が、例えば８, ０００〜１０, ０００ｐｐｍ
というように、高濃度に含有する含油排水の処理装置と
その処理方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating waste water discharged from a vegetable oil / fat refining process, and more particularly to an apparatus wherein the n-hexane soluble content is, for example, 8,000 to 10,000 ppm.
Thus, the present invention relates to an apparatus and a method for treating oil-containing wastewater containing a high concentration.
【０００２】[0002]
【従来の技術】従来から、一般的に採用されている排水
処理方法を大別すると、次のようになる。 １．活性汚泥法などの生物学的処理 ２．限外濾過などの物理的処理 ３．蒸留・吸着・電気透析・イオン交換などの高度処理 そして、現実的には、排水の発生量やその組成、汚染度
などに応じて最適な処理方法を選択し、連続運転が可能
で、かつ、経済的でもあり、環境にも優しい条件を設定
して排水処理が行われている。2. Description of the Related Art Conventionally, generally employed wastewater treatment methods are roughly classified as follows. 1. 1. Biological treatment such as activated sludge method 2. Physical treatment such as ultrafiltration Advanced treatments such as distillation, adsorption, electrodialysis, ion exchange, etc. And, in reality, the optimal treatment method is selected according to the amount of wastewater generated, its composition, pollution degree, etc., and continuous operation is possible, and Wastewater treatment is carried out under economically and environmentally friendly conditions.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、ｎ−ヘ
キサン可溶分が、例えば８, ０００〜１０, ０００ｐｐ
ｍというように、高濃度に含有している含油排水の処理
となると非常に難しく、この種の排水を従来から一般的
に採用されている含油排水方法、例えば加圧浮上法、加
圧浮上法＋活性汚泥法などを採用すると、汚泥が大量に
発生して環境面に悪影響を及ぼし、厳しくなった排水の
総量規制を到底クリアすることができない。 以前か
ら、含油排水の処理技術について色々と技術開発が行わ
れてきたが、未だに最適な処理方法が実現していないの
が現状である。そこで、本発明は、上記した問題点に鑑
みて発明されたものであって、排水の総量規制を充分ク
リアして環境面にも優しく、処理装置も非常にコンパク
トで経済的であり、連続運転が可能な含油排水処理装置
とその処理方法を得ることを目的とするものである。However, the n-hexane soluble matter is, for example, 8,000 to 10,000 pp.
m, it is very difficult to treat oil-containing wastewater containing a high concentration, and this kind of wastewater is generally used as an oil-containing wastewater method, such as a pressurized levitation method and a pressurized levitation method. + If the activated sludge method is adopted, a large amount of sludge will be generated, which will have an adverse effect on the environment, and the strict regulation on the total amount of wastewater cannot be cleared at all. Various technologies have been developed for the treatment of oil-containing wastewater from before, but at present the optimal treatment method has not yet been realized. Therefore, the present invention has been made in view of the above-mentioned problems, and is sufficiently environmentally friendly by fully clearing the regulation of the total amount of wastewater. The processing apparatus is also very compact and economical, and continuous operation is possible. It is an object of the present invention to obtain an oil-containing wastewater treatment apparatus and a treatment method capable of treating wastewater.
【０００４】[0004]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、次のような含油排水処理装置とその処
理方法を提供するものである。すなわち、本発明になる
第１の発明は、前処理した含油排水を１次処理する限外
濾過装置と、１次処理した排水を２次処理する流動床式
バイオリアクターを備えていることを特徴とする含油排
水処理装置であり、第２の発明は、限外濾過装置で１次
処理した排水に酸素を飽和状態近くまで溶解させるため
の循環槽を設けたことを特徴とする含油排水処理装置で
ある。そして、第３の発明は、含油排水を前処理した
後、限外濾過装置で１次処理し、次いで、流動床式バイ
オリアクターで２次処理することを特徴とする含油排水
処理方法であり、第４の発明は、限外濾過装置で１次処
理した排水に、循環槽で酸素を飽和状態近くまで溶解さ
せた後、流動床式バイオリアクターに供給することを特
徴とする含油排水処理方法である。In order to achieve the above object, the present invention provides the following oil-containing wastewater treatment apparatus and method. That is, the first invention according to the present invention is characterized in that it comprises an ultrafiltration device for primary treatment of pretreated oil-containing wastewater and a fluidized bed bioreactor for secondary treatment of primary treatment wastewater. The second invention is characterized in that a circulating tank is provided for dissolving oxygen in the wastewater subjected to the primary treatment by the ultrafiltration device to near the saturation state. It is. The third invention is a method for treating oil-containing wastewater, comprising pre-treating oil-containing wastewater, performing primary treatment with an ultrafiltration device, and then performing secondary treatment with a fluidized-bed bioreactor. A fourth invention is an oil-containing wastewater treatment method characterized in that oxygen is dissolved in a wastewater subjected to primary treatment by an ultrafiltration device in a circulation tank to near saturation, and then supplied to a fluidized bed bioreactor. is there.
【０００５】[0005]
【発明の実施の形態】以下、本発明になる含油排水処理
装置とその処理方法の実施の形態を、図面に示す実施例
に基づいて説明する。図１は含油排水処理装置の全体概
要図である。（１）は油分を高濃度に含有する排水を貯
蔵する排水タンクで、（２）は排水中の浮遊夾雑物など
を除去する濾過器、（３）は塩酸・硫酸などでｐＨをコ
ントロールするｐＨ調整器である。排水のｐＨ許容範囲
は７．５〜９．０にするのが好ましく、ｐＨが７．５よ
り低いと、後述するモジュールでの濾過能力の経時的安
定性が低下して好ましくなく、また、ｐＨが９．０より
高いと、排水中のｎ−ヘキサン可溶分が高くなって好ま
しくない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an oil-containing wastewater treatment apparatus and a method for treating the same according to the present invention will be described below based on embodiments shown in the drawings. FIG. 1 is an overall schematic diagram of an oil-containing wastewater treatment device. (1) a drainage tank for storing wastewater containing a high concentration of oil, (2) a filter for removing suspended impurities and the like in the wastewater, and (3) a pH controlling pH with hydrochloric acid and sulfuric acid. It is a regulator. The allowable pH range of the wastewater is preferably 7.5 to 9.0, and if the pH is lower than 7.5, the stability over time of the filtration ability of the module described below decreases, which is not preferable. Is higher than 9.0, the content of n-hexane solubles in the wastewater is undesirably high.
【０００６】前処理された排水、即ち濾過器（２）で濾
過されて、ｐＨ調整器（３）でｐＨ調整された排水は、
循環タンクである濃縮槽（４）に投入され、１次処理で
ある限外濾過がバッチ方式で所定時間循環して行われ
る。（５）は濃縮槽（４）から供給ポンプ（６）で送ら
れてくる排水を限外濾過するための限外濾過膜を内蔵し
たモジュールである。限外濾過膜は既に公知のものであ
って、本発明における実施例での限外濾過膜は旭化成工
業株式会社製造のポリアクリロニトリル共重化合物より
なるもので、特定の阻止率で阻止できる最小の分子量
（分画分子量）が１３, ０００の限外濾過膜を採用して
いる。また、モジュール（５）の濾過効率を長時間安定
的に維持するために、排水の温度は、排水中の脂肪酸混
合物の融点より高い３０℃〜４０℃の範囲まで加温して
おくのが好ましい。The pretreated wastewater, that is, the wastewater filtered by the filter (2) and adjusted in pH by the pH adjuster (3) is
It is charged into a concentration tank (4), which is a circulation tank, and ultrafiltration, which is a primary treatment, is circulated for a predetermined time in a batch system. (5) is a module having a built-in ultrafiltration membrane for ultrafiltration of wastewater sent from the concentration tank (4) by the supply pump (6). The ultrafiltration membrane is already known, and the ultrafiltration membrane in the examples of the present invention is made of a polyacrylonitrile co-polymer compound manufactured by Asahi Kasei Kogyo Co., Ltd. An ultrafiltration membrane having a molecular weight (fraction molecular weight) of 13,000 is employed. Further, in order to stably maintain the filtration efficiency of the module (5) for a long time, it is preferable that the temperature of the waste water is heated to a range of 30 ° C. to 40 ° C. higher than the melting point of the fatty acid mixture in the waste water. .
【０００７】限外濾過処理装置は以上のような構成にな
っており、濾過器（２）で濾過されて、ｐＨ調整器
（３）でｐＨ調整された排水は、濃縮槽（４）に投入さ
れた後、供給ポンプ（６）でモジュール（５）に送られ
て限外濾過され、限外濾過された１次処理水は１次処理
水槽（７）に送られて貯蔵される。そして、限外濾過さ
れなかった濃縮液は濃縮槽（４）に戻され、再度モジュ
ール（５）に送られて更に濃縮される。この限外濾過処
理装置はバッチ方式となっているので、濃縮槽（４）に
投入された排水は、所定の水質にモジュール（５）で濾
過された１次処理水と、最終濃縮液とに分離され、１次
処理水は１次処理水槽（７）に貯蔵されて２次処理工程
である流動床式バイオリアクターへ送られ、最終濃縮液
は濃縮槽（４）から排出管（８）を経て系外へ排出され
て処理される。なお、最終濃縮液の量は非常に少なく、
ｎ−ヘキサン可溶分の量が約１０〜４０重量％と高いの
で、燃料としての再利用も可能である。そして、１バッ
チの限外濾過処理が終了すると、モジュール（５）を薬
液で洗浄するとともに、濃縮槽（４）に前処理した排水
を再度投入して、上記した濾過処理を繰り返し継続する
ものである。[0007] The ultrafiltration treatment apparatus is configured as described above, and the wastewater filtered by the filter (2) and adjusted in pH by the pH adjuster (3) is supplied to the concentration tank (4). After that, the feed water is sent to the module (5) by the supply pump (6) to be subjected to ultrafiltration, and the ultrafiltered primary treated water is sent to the primary treated water tank (7) for storage. Then, the concentrated liquid not subjected to ultrafiltration is returned to the concentration tank (4), sent to the module (5) again, and further concentrated. Since the ultrafiltration treatment apparatus is of a batch type, the wastewater supplied to the concentration tank (4) is converted into primary treated water filtered to a predetermined water quality by a module (5) and final concentrated liquid. Separated, the primary treated water is stored in the primary treated water tank (7) and sent to the fluidized bed bioreactor which is the secondary treatment step, and the final concentrated liquid is discharged from the concentrated tank (4) through the discharge pipe (8). After being discharged outside the system, it is processed. The amount of the final concentrate is very small,
Since the amount of the n-hexane soluble component is as high as about 10 to 40% by weight, it can be reused as a fuel. When one batch of ultrafiltration processing is completed, the module (5) is washed with a chemical solution, and the pretreated wastewater is again charged into the concentration tank (4), and the above-described filtration processing is repeated and continued. is there.
【０００８】次に、１次処理水槽（７）に貯蔵されてい
る１次処理水の２次処理工程について説明する。（１
０）は平均粒径が０．５ｍｍの破砕された既に公知の活
性炭（以下、担体と略称する）が充填された流動床式バ
イオリアクターである。（１１）は流動床式バイオリア
クター（１０）で処理されてオーバーフローした排水が
送り込まれる循環槽であって、循環槽（１１）にはブロ
ワー（１２）からエアーが常時供給されている。したが
って、循環槽（１１）内の排水には、酸素が飽和状態近
くまで溶解する。１次処理水槽（７）に貯蔵されている
１次処理水は、供給ポンプ（９）で循環ポンプ（１３）
の吸入口へ送られ、酸素が飽和状態近くまで溶解してい
る循環槽（１１）内の排水と混合する。そして、１次処
理水と混合し、酸素が飽和状態近くまで溶解した排水
は、循環ポンプ（１３）で流動床式バイオリアクター
（１０）の下部から供給され、流動床式バイオリアクタ
ー（１０）に充填された担体は、流動状態となってその
排水と接触する。Next, the secondary treatment of the primary treated water stored in the primary treated water tank (7) will be described. (1
Reference numeral 0) denotes a fluidized bed bioreactor filled with crushed activated carbon (hereinafter abbreviated as a carrier) having an average particle size of 0.5 mm. (11) is a circulation tank into which wastewater treated and overflowed by the fluidized-bed bioreactor (10) is fed, and air is constantly supplied from the blower (12) to the circulation tank (11). Therefore, oxygen dissolves in the drainage water in the circulation tank (11) until it is almost saturated. The primary treated water stored in the primary treated water tank (7) is circulated by the supply pump (9) and the circulation pump (13).
And mixed with the wastewater in the circulation tank (11) in which oxygen is dissolved to near saturation. The wastewater mixed with the primary treated water and having oxygen dissolved to near saturation is supplied from the lower part of the fluidized bed bioreactor (10) by the circulation pump (13), and is supplied to the fluidized bed bioreactor (10). The filled carrier is in a fluid state and comes into contact with the wastewater.
【０００９】流動床式バイオリアクター（１０）内の担
体の表面には好気性微生物が、また、ポーラス状態とな
っている担体の内部には嫌気性微生物がそれぞれ付着し
ているので、担体は排水と接触しながら、担体表面に付
着する微生物が排水に含有している有機物などを好気性
処理し、担体内部に付着する微生物が排水に含有してい
る有機物などを嫌気性処理して、それぞれ効率よく分解
して行く。なお、直接エアーを流動床式バイオリアクタ
ー（１０）内に供給すると、発生する気泡により、担体
である活性炭が撹拌されて、微生物が担体に付着・成長
し難く、また、浮上するので、本発明では、微生物が担
体に付着して成長し、有機物を効率よく分解して行くた
めに、上記したように、事前に循環槽（１１）内の排水
に酸素を飽和状態近くまで溶解せしめて、流動床式バイ
オリアクター（１０）に送り込む方式を採用している。
こうして、所定の値まで清浄化された２次処理水は、循
環槽（１１）から系外へ排出されるが、２次処理された
排水の水質は排水の総量規制を充分クリアしているの
で、その状態のままで一般の河川などに放出しても何ら
心配はいらない。Aerobic microorganisms adhere to the surface of the carrier in the fluidized bed bioreactor (10), and anaerobic microorganisms adhere to the inside of the porous carrier. While contacting with the carrier, the microorganisms adhering to the carrier surface aerobically treat the organic substances contained in the wastewater, and the microorganisms adhering to the inside of the carrier anaerobically treat the organic substances contained in the wastewater to improve the efficiency, respectively. Disassemble well. When direct air is supplied into the fluidized bed type bioreactor (10), activated carbon as a carrier is agitated by generated bubbles, so that microorganisms hardly adhere to and grow on the carrier, and float. Then, in order to allow microorganisms to grow on the carrier and decompose organic matter efficiently, as described above, oxygen is dissolved in the wastewater in the circulation tank (11) in advance to near saturation, A method of feeding into a bioreactor (10) is adopted.
The secondary treated water thus purified to a predetermined value is discharged from the circulation tank (11) to the outside of the system. However, since the quality of the secondary treated wastewater sufficiently satisfies the total wastewater regulation, There is no need to worry if it is released to ordinary rivers in that state.
【００１０】[0010]
【実施例】本発明になる含油排水処理装置は以上のよう
な構成になっているので、実測データを使って更に詳細
に説明する。 まず、ｎ−ヘキサン可溶分 ８, ０００〜１０, ０００ｐｐｍ ＢＯＤ ２６, ０００ｐｐｍ ＣＯＤ ９, ０００ｐｐｍ ＳＳ ２, ０００〜３０, ０００ｐｐｍ の排水を８０ｍｅｓｈで濾過した後、ｐＨを８．５に調
整して濃縮槽（４）に投入し、排水量１００ｍ3 ／Ｄを
２０ｈ／Ｄで１次処理のバッチ運転を行った。使用した
モジュール（５）は旭化成工業株式会社製造のＵＦ膜
（ＡＣＶ−５０１０）４０本である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The oil-containing wastewater treatment apparatus according to the present invention has the above-described configuration, and will be described in further detail using actually measured data. First, effluent of n-hexane soluble matter 8,000 to 10,000 ppm, BOD 26,000 ppm, COD 9000 ppm, SS 2,000 to 30,000 ppm is filtered through 80 mesh, and then the pH is adjusted to 8.5 and concentrated. The mixture was charged into the tank (4), and the batch operation of the primary treatment was performed at a drainage rate of 100 m 3 / D at 20 h / D. The module (5) used was 40 UF membranes (ACV-5010) manufactured by Asahi Kasei Corporation.
【００１１】その結果、濾過されて１次処理水槽（７）
に貯蔵された１次処理水の水質は下記の通りであった。 ｎ−ヘキサン可溶分 ２００ｐｐｍ ＢＯＤ １, ０００ｐｐｍ ＣＯＤ ８００ｐｐｍ ＳＳ ５ｐｐｍ以下 また、濃縮槽（４）から排出された残液（最終濃縮液）
の処理量は３ｍ3 ／Ｄであった。As a result, the water is filtered and subjected to the primary treatment water tank (7).
The quality of the primary treated water stored in the following was as follows. n-hexane soluble matter 200 ppm BOD 1,000 ppm COD 800 ppm SS 5 ppm or less Residual liquid (final concentrated liquid) discharged from the concentration tank (4)
Was 3 m 3 / D.
【００１２】引き続いて、この１次処理水を流動床式バ
イオリアクター（１０）で、１００ｍ3 ／Ｄの連続運転
で、２次処理を行った。流動床式バイオリアクター（１
０）は円筒型の槽で、この流動床式バイオリアクター
（１０）には、一般に市販されている平均粒径０．５ｍ
ｍの破砕された活性炭を容量比で３０％充填した。その
結果、循環槽（１１）から系外へ排出された２次処理水
の水質は下記の通りであった。 ｎ−ヘキサン可溶分 １ｐｐｍ以下 ＢＯＤ １ｐｐｍ以下 ＣＯＤ ６〜１０ｐｐｍ以下 ＳＳ １０〜２０ｐｐｍ以下 この２次処理水は排水の総量規制を充分クリアしている
ので、その状態のままで一般の河川に放出した。Subsequently, the primary treatment water was subjected to a secondary treatment in a fluidized bed bioreactor (10) in a continuous operation at 100 m 3 / D. Fluid bed bioreactor (1
0) is a cylindrical tank, and the fluidized bed type bioreactor (10) has an average particle size of 0.5 m, which is generally commercially available.
m of the crushed activated carbon were filled at a volume ratio of 30%. As a result, the quality of the secondary treated water discharged from the circulation tank (11) to the outside of the system was as follows. n-Hexane soluble content 1 ppm or less BOD 1 ppm or less COD 6 to 10 ppm or less SS 10 to 20 ppm or less Since this secondary treated water has sufficiently cleared the total wastewater regulation, it was released to general rivers in that state .
【００１３】[0013]
【発明の効果】以上、本発明になる含油排水処理装置と
その処理方法によれば、高濃度に油分を含有した排水を
安定的に、かつ、経済的に処理することができ、しかも
処理された排水は、排水の総量規制を充分クリアするの
で、環境にも優しく、その状態のままで一般の河川に放
出することができる。したがって、排水と環境汚染が議
論される今日、本発明の業界に及ぼす効果は著しいもの
がある。As described above, according to the apparatus for treating oil-containing wastewater and the method for treating the same according to the present invention, wastewater containing a high concentration of oil can be treated stably and economically. Wastewater, which fully satisfies the regulation on total amount of wastewater, is environmentally friendly and can be discharged to ordinary rivers as it is. Therefore, the effects of the present invention on the industry are remarkable as wastewater and environmental pollution are discussed.
【図１】含油排水処理装置の全体概要図FIG. 1 is an overall schematic diagram of an oil-containing wastewater treatment device.
１ 排水タンク ２ 濾過器 ３ ｐＨ調整器 ４ 濃縮槽 ５ モジュール ６ 供給ポンプ ７ １次処理水槽 ８ 排出管 ９ 供給ポンプ １０ 流動床式バイオリアクター １１ 循環槽 １２ ブロワー １３ 循環ポンプ DESCRIPTION OF SYMBOLS 1 Drainage tank 2 Filter 3 pH adjuster 4 Concentration tank 5 Module 6 Supply pump 7 Primary treatment water tank 8 Discharge pipe 9 Supply pump 10 Fluid bed type bioreactor 11 Circulation tank 12 Blower 13 Circulation pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 荒木 栄治 東京都港区港南４−１−８ リバージュ 品川ビル 旭エンジニアリング株式会社 内 (72)発明者 庄司 勝行 大阪府堺市上野芝２丁目500−１ (72)発明者 舩路 徳七 兵庫県神戸市須磨区高倉台８−26−22 (56)参考文献 特開 平６−55172（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/02 - 3/10 C02F 9/00 501 - 504 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Eiji Araki 4-1-8 Konan, Minato-ku, Tokyo Rivage Shinagawa Building Asahi Engineering Co., Ltd. (72) Inventor Katsuyuki Shoji 2-500-1 Uenoshiba, Sakai City, Osaka ( 72) Inventor Tokunichi Funaji 8-26-22 Takakuradai, Suma-ku, Kobe-shi, Hyogo (56) References JP-A-6-55172 (JP, A) (58) Fields investigated (Int. Cl. 7 , (DB name) C02F 3/02-3/10 C02F 9/00 501-504
Claims (4)
に前処理した高濃度の油分が含有されている含油排水
を、バッチ方式で所定時間循環して１次処理する限外濾
過装置と、１次処理した排水を２次処理する流動床式バ
イオリアクターを備えていることを特徴とする含油排水
処理装置。1. pH 7.5 to 9.0, temperature 30 to 40 ° C.
Fluidized bed bioreactor the oil-containing wastewater high concentrations of oil pretreated are contained, for secondary treatment and ultrafiltration apparatus, primary treated waste water to a predetermined time circulating primary processing in batch mode in An oil-containing wastewater treatment device comprising:
を飽和状態近くまで溶解させるための循環槽を設けたこ
とを特徴とする請求項１に記載の含油排水処理装置。2. The oil-containing wastewater treatment apparatus according to claim 1, further comprising a circulation tank for dissolving oxygen in the wastewater primarily treated by the ultrafiltration apparatus until the oxygen is almost saturated.
を、ｐＨ７．５〜９．０、温度３０〜４０℃に前処理し
た後、バッチ方式で所定時間循環して限外濾過装置で１
次処理し、次いで、流動床式バイオリアクターで２次処
理することを特徴とする含油排水処理方法。3. An oil-containing wastewater containing a high concentration of oil is pretreated to a pH of 7.5 to 9.0 and a temperature of 30 to 40 ° C., and then circulated in a batch system for a predetermined time to be passed through an ultrafiltration device. 1
An oil-containing wastewater treatment method, comprising performing a secondary treatment and then a secondary treatment in a fluidized bed bioreactor.
環槽で酸素を飽和状態近くまで溶解させた後、流動床式
バイオリアクターに供給することを特徴とする請求項３
に記載の含油排水処理方法。4. The method according to claim 3, wherein oxygen is dissolved in the effluent subjected to the primary treatment by the ultrafiltration device to a saturation state in a circulation tank, and then supplied to a fluidized bed bioreactor.
2. The method for treating oil-containing wastewater according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34297797A JP3350424B2 (en) | 1997-12-12 | 1997-12-12 | Oil-containing wastewater treatment apparatus and its treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34297797A JP3350424B2 (en) | 1997-12-12 | 1997-12-12 | Oil-containing wastewater treatment apparatus and its treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11169881A JPH11169881A (en) | 1999-06-29 |
| JP3350424B2 true JP3350424B2 (en) | 2002-11-25 |
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ID=18357982
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34297797A Expired - Fee Related JP3350424B2 (en) | 1997-12-12 | 1997-12-12 | Oil-containing wastewater treatment apparatus and its treatment method |
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| Country | Link |
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| JP (1) | JP3350424B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001259673A (en) * | 2000-03-15 | 2001-09-25 | Japan Energy Corp | Treating method of oil-containing waste water |
| JP2002273462A (en) * | 2001-03-22 | 2002-09-24 | Asahi Kasei Corp | Method and device for treating waste water |
| CN104556569A (en) * | 2014-12-23 | 2015-04-29 | 北京桑德环境工程有限公司 | Method and system for treatment of oil shale distillation sewage |
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1997
- 1997-12-12 JP JP34297797A patent/JP3350424B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| JPH11169881A (en) | 1999-06-29 |
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