JPS6150039B2 - - Google Patents
Info
- Publication number
- JPS6150039B2 JPS6150039B2 JP57135429A JP13542982A JPS6150039B2 JP S6150039 B2 JPS6150039 B2 JP S6150039B2 JP 57135429 A JP57135429 A JP 57135429A JP 13542982 A JP13542982 A JP 13542982A JP S6150039 B2 JPS6150039 B2 JP S6150039B2
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- tank
- aeration
- gas
- air
- 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
- 239000001301 oxygen Substances 0.000 claims description 41
- 229910052760 oxygen Inorganic materials 0.000 claims description 41
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 40
- 238000005273 aeration Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 15
- 239000010865 sewage Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
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)
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撹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がある
が、そのためには大きな動力を要するなどの問題
があつた。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 conventional activated sludge treatment method, the air diffuser
The oxygen dissolution rate is about 7 to 8%, and most of the air used for aeration is consumed as stirring energy, so in order to increase the oxygen dissolution rate, it is necessary to increase the aeration rate or deepen the effective water depth. However, there were problems such as the need for 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（DO6〜10mg/）を維持
することができる。従つて、極めて高い容積負
荷を設定でき、混合液中のMLSSを6000〜
10000mg/に維持できるので曝気槽容積を縮小
できる。(1) Because pure oxygen is used, the oxygen transfer rate is extremely fast compared to air aeration methods, and a high dissolved oxygen level (DO6 - 10mg/) can be maintained in the aeration tank. Therefore, extremely high volume loads can be set, and the MLSS in the mixed liquid can be set to 6000~
Since it can be maintained at 10,000mg/, 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.
(3) 汚泥の発生量が空気曝気法に比べてかなり少
なく汚泥処理に要する費用が著しく節減でき
る。(3) The amount of sludge generated is considerably less than that of the air aeration method, and the cost required for sludge treatment can be significantly reduced.
しかしながら、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撹拌強度が弱い。(b) Since the utilization efficiency of pure oxygen reaches over 95%, 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, in this invention, the oxygen concentration in the aeration tank is between 30 and 80.
It is characterized by blowing in concentrated air of about 1.5%.
上記濃縮空気は、酸素濃縮機によつて簡単に得
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を除去し、空気中の酸素濃度
を上げるようになつている。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 above-mentioned concentrated air can be easily obtained using an oxygen concentrator. Oxygen concentrators use zeolite or the like to remove nitrogen from the air and increase the oxygen concentration in the air. The above concentrated air is 30
An oxygen concentration of about 80% is used, preferably about 40 to 60%.
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の上部には溢流樋４を設けた
構造になつている。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
上部から溢流樋４に流出するようになつており、
この溢流樋４に流出した混合水５はポイプ６によ
つて内槽３内に返送されるようになつている。ま
た、上記内槽３には、酸素濃縮機７によつて濃縮
された酸素濃度30〜80％の濃縮空気８が吹き込ま
れるようになつている。この濃縮空気８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
動速度は空気よりもかなり速く、曝気槽内の高い
溶存酸素レベルを維持するには十分である。ま
た、上記濃縮空気８には、純酸素と違つて20％〜
70％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内の撹拌を行なう。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によつて振り分けるようになつている。 Next, a sewage treatment facility using this invention will be explained. As shown in the drawing, the aeration tank 1 is hermetically sealed, and has an inner tank 3 with an open bottom inside the outer tank 2, and an overflow gutter 4 in the upper part of the outer tank 2. There is. 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 gutter 4.
The mixed water 5 flowing into the overflow gutter 4 is returned to the inner tank 3 by a dropper 6. Concentrated air 8 having an oxygen concentration of 30 to 80% is blown into the inner tank 3 by an oxygen concentrator 7. The oxygen in this concentrated air 8 is used to increase the dissolved oxygen level in the inner tank 3. The oxygen transfer rate of this concentrated air 8 into the mixed liquid 5 is much faster than that of air and is sufficient to maintain a high dissolved oxygen level within the aeration tank. In addition, unlike pure oxygen, the concentrated air 8 has a concentration of 20% to
Since it contains 70% 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, the present invention is a sewage treatment method characterized by blowing concentrated air with an oxygen concentration of about 30 to 80% into an aeration tank, and therefore 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) 濃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
撹拌効率がよい。(2) Even if the oxygen in the concentrated air is absorbed into the mixed liquid, the concentrated air, unlike pure oxygen, contains sufficient amounts of nitrogen gas, etc., so the stirring efficiency using this nitrogen gas is good.
(3) 濃縮空気は、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) Concentrated air is cheaper than pure oxygen, so sewage treatment costs can be reduced.
(4) 槽内上部のガス中の酸素濃度を計測すること
によつて、槽内の必要酸素量とエアーリフトに
必要な循環ガス量をコントロールできる。(4) By measuring the oxygen concentration in the gas at the top of the tank, the amount of oxygen required in the tank and the amount of circulating gas required for air lift can be controlled.
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。
The drawing is a schematic diagram of a sewage treatment facility using this invention. 1...Aeration tank, 8...Concentrated air.
Claims (1)
られた内槽とによつて構成し、上記内槽にガスを
吹き込むことにより曝気槽内の混合液を内槽から
外槽へ循環させながら生物処理する下水処理方法
において、上記内槽へ込むガスとして酸素濃縮機
によつて濃縮した濃縮空気と曝気槽上部のガスを
使用し、上記曝気槽上部のガスの酸素濃度を計測
して上記内槽へ吹き込むガスの酸素濃度を30〜80
％程度に調節することを特徴とする下水処理方
法。1 A closed aeration tank is composed of an outer tank and an inner tank provided within the outer tank, and by blowing gas into the inner tank, the mixed liquid in the aeration tank is transferred from the inner tank to the outer tank. In a sewage treatment method that performs biological treatment while circulating, concentrated air concentrated by an oxygen concentrator and the gas at the top of the aeration tank are used as the gas entering the inner tank, and the oxygen concentration of the gas at the top of the aeration tank is measured. to increase the oxygen concentration of the gas blown into the inner tank from 30 to 80.
A sewage treatment method characterized by adjusting the amount to about %.
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 JPS5926194A (en) | 1984-02-10 |
| JPS6150039B2 true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2451870A (en) * | 2007-08-15 | 2009-02-18 | United Utilities Plc | Method and Apparatus for Aeration |
| 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 |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5926194A (en) | 1984-02-10 |
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