JPS5926194A - Sewage disposal - Google Patents
Sewage disposalInfo
- Publication number
- JPS5926194A JPS5926194A JP57135429A JP13542982A JPS5926194A JP S5926194 A JPS5926194 A JP S5926194A JP 57135429 A JP57135429 A JP 57135429A JP 13542982 A JP13542982 A JP 13542982A JP S5926194 A JPS5926194 A JP S5926194A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- tank
- air
- conc
- aeration
- 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
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
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、酸素を利用した下水処理方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sewage treatment method using oxygen.
従来の活性汚泥処理法における散気装置では、酸素溶解
率が７〜８％程度で、しかも曝気に使用された空気の大
部分が攪拌エネルギーとして消費され、酸素溶解率を上
げるためには通気量を増すか、有効水深を深くして深層
化する必要かあるが、そのためには大きな動力を要する
などの問題かあった。このため、近年は、従来の空気曝
気法の代りに純酸素を使用する酸素曝気法が開発されて
きている。この純酸素を使用する酸素曝気法には、次の
ような利点がある。In the aeration equipment used in conventional activated sludge treatment methods, the oxygen dissolution rate is around 7 to 8%, and most of the air used for aeration is consumed as stirring energy, so the amount of aeration is required to increase the oxygen dissolution rate. It would be necessary to either increase the water depth or increase the effective water depth, but this would require a large amount of power. For this reason, in recent years, oxygen aeration methods using pure oxygen have been developed in place of the conventional air aeration methods. This oxygen aeration method using pure oxygen has the following advantages.
（１） 純酸素を使用するために、空気曝気法にくら
べて酸素の移動速度が極めて速く、曝気槽内で高い溶存
酸素レベル（ＤＯ６〜１０■／ｌ）を維持することがで
きる。従って、極めて高い容積負荷を設定でき、混合液
中のＭＬＳＳを６，０００〜１０，０００ ｒｎｇ／
ｌに゛維持できるので曝気槽容積を縮小できる。(1) Since pure oxygen is used, the oxygen transfer rate is extremely fast compared to the air aeration method, and a high dissolved oxygen level (DO 6 to 10 ■/l) can be maintained in the aeration tank. Therefore, extremely high volumetric loads can be set, and the MLSS in the mixture can be reduced to 6,000 to 10,000 rng/
1, the volume of the aeration tank can be reduced.
（２）溶存酸素濃度が高いために、高い微生物活性を維
持することができ、処理機能が優、れている。(2) Due to the high dissolved oxygen concentration, high microbial activity can be maintained and the treatment function is excellent.
しか°゛シ゛−がら、純酸素を使用した酸素曝気法にも
次のような問題点がある。However, the oxygen aeration method using pure oxygen also has the following problems.
（イ） 純酸素を使用するため、処理コストが高くなり
、大容量の処理設備には不向きである。(a) Since pure oxygen is used, the processing cost is high and it is not suitable for large-capacity processing equipment.
（ロ） 純酸素の利用効率は９５％以上にも達するので
、曝気槽内での混合液の攪拌強度が弱い。(b) Since the utilization efficiency of pure oxygen reaches 95% or more, the stirring intensity of the mixed liquid in the aeration tank is weak.
そこで、この発明は、上記酸素曝気法の利点を生かしつ
つ、上記酸素曝気法の問題点を解消した下水処理方法を
提供することを目的とする。Therefore, an object of the present invention is to provide a sewage treatment method that eliminates the problems of the oxygen aeration method while taking advantage of the advantages of the oxygen aeration method.
即ち、この発明は、曝気槽に酸素濃度が３０〜８０％程
度の濃縮空気を吹き込むことを特徴とするものである。That is, the present invention is characterized in that concentrated air having an oxygen concentration of about 30 to 80% is blown into the aeration tank.
上記濃縮空気は、酸素濃縮機によって簡単に得ることが
できる。酸素濃縮機は、ゼオライト等を用いて空気中の
窒素等を除去し、空気中の酸素濃度を上げるようになっ
ている。上記濃縮空気は、３０〜８０％程度の酸素濃度
を有するものが使用されるが、好ましくは４０〜６０％
程度である。The enriched air can be easily obtained using an oxygen concentrator. Oxygen concentrators use zeolite or the like to remove nitrogen, etc. from the air and increase the oxygen concentration in the air. The concentrated air used has an oxygen concentration of about 30 to 80%, preferably 40 to 60%.
That's about it.
次に、この発明を利用した下水処理施設について説明す
る。図面に示すように、曝気槽１は、密閉されており、
その外槽２内に底部を開放した内槽、３を設け、外槽２
の上部に溢流槽４を設けた構造になっている。処理水は
内槽３内に供給され、槽内の混合液５は内槽３を通過し
、外槽２の上部から溢流槽４に流出するようになってお
り、この溢流槽４に流出した混合水５はポイズ６によっ
て内槽３内に返送されるようになっている。また、上記
内槽３には、酸素濃縮機７によって濃縮された酸素濃度
３０〜８０％の濃縮空気８が吹き込まれるようになって
いる。この濃縮空気日中の酸素は、内槽３内の溶存酸素
レベルを上げるのに利用される。この濃縮空気８の混合
液５中への酸素移動速−は空気よりもかなり速＜、凄気
槽内の高い溶存酸素レベルを維持するには十分である。Next, a sewage treatment facility using this invention will be explained. As shown in the drawing, the aeration tank 1 is sealed,
An inner tank 3 with an open bottom is provided inside the outer tank 2, and an outer tank 2
It has a structure in which an overflow tank 4 is provided on the upper part of the tank. The treated water is supplied into the inner tank 3, and the mixed liquid 5 in the tank passes through the inner tank 3 and flows out from the upper part of the outer tank 2 into the overflow tank 4. The mixed water 5 that has flowed out is returned to the inner tank 3 by a poise 6. Concentrated air 8 having an oxygen concentration of 30 to 80% is blown into the inner tank 3 by an oxygen concentrator 7. This concentrated air diurnal oxygen is utilized to increase the dissolved oxygen level within the inner tank 3. The oxygen transfer rate of this enriched air 8 into the mixture 5 is much faster than that of air, and is sufficient to maintain a high dissolved oxygen level in the aeration tank.
また、上記濃縮空気８には、純酸素と違って２０％〜７
０％の窒素ガス等が含まれているので、濃縮空気中の酸
素が混合液に溶存しても、窒素ガス等が曝気槽１内の攪
拌を行なう。また、上記曝気槽１の上部のガス中の酸素
濃度を酸素濃度計９で計測し、この酸素濃度が一定以上
ならば、上記下水処理施設の酸素源に使用し、酸素濃度
が一定以下ならば次のプロセス１０の酸素源に用いるよ
うに電磁弁１１によって振り分けるようになっている。In addition, unlike pure oxygen, the concentrated air 8 contains 20% to 7%
Since it contains 0% nitrogen gas, etc., even if oxygen in the concentrated air is dissolved in the mixed liquid, the nitrogen gas etc. will stir the inside of the aeration tank 1. In addition, the oxygen concentration in the gas in the upper part of the aeration tank 1 is measured with an oxygen concentration meter 9, and if the oxygen concentration is above a certain level, it is used as an oxygen source for the sewage treatment facility, and if the oxygen concentration is below a certain level, it is used as an oxygen source. The oxygen is distributed by a solenoid valve 11 to be used as an oxygen source for the next process 10.
以上のように、この発明は、曝気槽に酸素濃度が３０〜
８０％程度の濃縮空気を吹き込むことを特徴とする下水
処理方法であるため、次に列挙する効果をする。As described above, in this invention, the oxygen concentration in the aeration tank is 30 to 30.
Since this is a sewage treatment method characterized by blowing in about 80% concentrated air, it has the following effects.
（１）酸素濃度が高い濃縮空気を使用するため、曝気槽
での酸素移動速度が速く、曝気槽内の溶存酸素レベルが
高い。(1) Since concentrated air with a high oxygen concentration is used, the oxygen transfer rate in the aeration tank is fast and the dissolved oxygen level in the aeration tank is high.
（２）ａ縮空気中の酸素が混合液中に吸収されても、濃
縮空気は純酸素と異なり窒素ガス等も十分に含まれてい
るため、この窒素ガス等による攪拌効率かよい。(2) a Even if the oxygen in the condensed air is absorbed into the mixed liquid, since the condensed air, unlike pure oxygen, contains a sufficient amount of nitrogen gas, etc., the efficiency of stirring by this nitrogen gas etc. is good.
（３）ａ縮空気は、純酸素に比し、コストが安いので、
下水処理コストを節減することができる。(3)a Compressed air is cheaper than pure oxygen, so
Sewage treatment costs can be reduced.
図面はこの発明を利用した下水処理施設の概略図である
。
１・・・曝気槽、８・・・濃縮空気、
特許出願人 久保田鉄工株式会社
同 代理人 鎌 １） 文 ニ６′The drawing is a schematic diagram of a sewage treatment facility using this invention. 1...Aeration tank, 8...Concentrated air, Patent applicant: Kubota Iron Works Co., Ltd. Agent: Kama 1) Text d6'
Claims (1)
込むことを特徴とする下水処理方法。A sewage treatment method characterized by blowing concentrated air with an oxygen concentration of about 30 to 80% into an aeration tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57135429A JPS5926194A (en) | 1982-07-31 | 1982-07-31 | Sewage disposal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57135429A JPS5926194A (en) | 1982-07-31 | 1982-07-31 | Sewage disposal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5926194A true JPS5926194A (en) | 1984-02-10 |
| JPS6150039B2 JPS6150039B2 (en) | 1986-11-01 |
Family
ID=15151516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57135429A Granted JPS5926194A (en) | 1982-07-31 | 1982-07-31 | Sewage disposal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5926194A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010535627A (en) * | 2007-08-15 | 2010-11-25 | ユナイテッド・ユーティリティーズ・ピーエルシー | Method and apparatus for aeration |
| CN105399224A (en) * | 2015-12-01 | 2016-03-16 | 中国科学院、水利部成都山地灾害与环境研究所 | Efficient drop water oxygen exposing system and method for purification of domestic wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627098A (en) * | 1979-08-10 | 1981-03-16 | Mitsubishi Heavy Ind Ltd | Controller for blower or compressor |
| JPS5750597A (en) * | 1980-09-10 | 1982-03-25 | Kubota Ltd | Water treatment device |
-
1982
- 1982-07-31 JP JP57135429A patent/JPS5926194A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627098A (en) * | 1979-08-10 | 1981-03-16 | Mitsubishi Heavy Ind Ltd | Controller for blower or compressor |
| JPS5750597A (en) * | 1980-09-10 | 1982-03-25 | Kubota Ltd | Water treatment device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010535627A (en) * | 2007-08-15 | 2010-11-25 | ユナイテッド・ユーティリティーズ・ピーエルシー | Method and apparatus for aeration |
| CN105399224A (en) * | 2015-12-01 | 2016-03-16 | 中国科学院、水利部成都山地灾害与环境研究所 | Efficient drop water oxygen exposing system and method for purification of domestic wastewater |
| CN105399224B (en) * | 2015-12-01 | 2018-04-06 | 中国科学院、水利部成都山地灾害与环境研究所 | A kind of efficient drop for purifying domestic sewage exposes oxygen system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6150039B2 (en) | 1986-11-01 |
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