JPH01135594A - Treatment of organic waste water with active sludge - Google Patents
Treatment of organic waste water with active sludgeInfo
- Publication number
- JPH01135594A JPH01135594A JP62291731A JP29173187A JPH01135594A JP H01135594 A JPH01135594 A JP H01135594A JP 62291731 A JP62291731 A JP 62291731A JP 29173187 A JP29173187 A JP 29173187A JP H01135594 A JPH01135594 A JP H01135594A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- tank
- oxygen
- returned
- gas
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000010815 organic waste Substances 0.000 title abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000001301 oxygen Substances 0.000 claims abstract description 23
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 20
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 12
- 239000002351 wastewater Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000005273 aeration Methods 0.000 description 12
- 239000012071 phase Substances 0.000 description 6
- 238000002407 reforming Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 229930091051 Arenine Natural products 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012476 oxidizable substance Substances 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 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
- Activated Sludge Processes (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明に有機性廃水の活性汚泥処理法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for treating organic wastewater with activated sludge.
活性汚泥法において、空気を用いて曝気する方式（以下
エアレーションと記載する）に対して、純酸素（以下０
８ と略記する）ｆｔ用いて曝気する純酸素曝気法は
高率の酸素供給を行うことができ、かつ活性汚泥の沈降
性が改善されるなどの実用的利点があるため、米国に端
を発し、日本でも利用されている。また、活性汚泥の沈
降性改良のため生物処理槽の後段でだけＯ，曝気を行い
、活性汚泥の沈降性を改良し九事例がある（第１４回下
水道研究発表会講演集、昭和５２年１０月４日発行、２
３３〜２３５頁）。In the activated sludge method, in contrast to the method of aeration using air (hereinafter referred to as aeration), pure oxygen (hereinafter referred to as 0
The pure oxygen aeration method, in which aeration is performed using 8 ft (abbreviated as 8) ft, has practical advantages such as being able to supply oxygen at a high rate and improving the sedimentation properties of activated sludge, so it originated in the United States. , is also used in Japan. In addition, in order to improve the settling properties of activated sludge, there are nine cases in which oxygen and aeration are performed only in the latter stages of the biological treatment tank to improve the settling properties of activated sludge (Proceedings of the 14th Sewerage Research Conference, October 1970). Published on the 4th of each month, 2
(pp. 33-235).
廃水処理において、処理費用を低減することは最重要課
題である。Ｏ１曝気法は、空気曝気法と異なり製造費用
のかかる有価のガスを利用する方法であシ、ｏｌｔ−で
きうるかぎシ高率に利用することが最大の要点である。In wastewater treatment, reducing treatment costs is the most important issue. Unlike the air aeration method, the O1 aeration method uses a valuable gas that is expensive to manufacture, and the most important point is to use it at a high rate.
しかしながら、これまで開発された処理技術でに排ガス
中の酸素及び流出液中の溶存酸素ａ度が高いため０曹
の利用率は７０９１程度にとどまっている（水処理工学
２５４−２５６頁 昭和５１年６月発行）。However, due to the high oxygen content in the flue gas and dissolved oxygen in the effluent, the processing technology developed so far does not allow
The utilization rate remains at around 7,091 (Water Treatment Engineering, pp. 254-256, published June 1978).
本発明は部分的にＯｓ ｔ’利用して活性汚泥の沈降性
を向上するとともにＯｇｋ１００％近く利用して０雪
利用効率の向上、ならびにその動力費の削減をはかる方
法でおる。The present invention partially utilizes Ost' to improve the sedimentation properties of activated sludge, and uses nearly 100% of Ogk to achieve zero snowfall.
This method aims to improve usage efficiency and reduce power costs.
１＋、沈降汚泥の濃縮性が良くなるので、汚泥処理が容
易となり、かつ脱水性も改善される。1+: Since the concentration of settled sludge is improved, sludge treatment becomes easier and dewatering performance is also improved.
沈殿槽からの返送汚泥を原水と混合する前に密閉水槽で
酸素又は酸素富化ガスと接触させ、しかるのちに原水と
混合し、返送汚泥中の過剰な酸素ｔ−原水中の有機物の
一部の酸化に利用し念のちにエアンークヨンを行うもの
である。The returned sludge from the settling tank is brought into contact with oxygen or oxygen-enriched gas in a closed water tank before being mixed with the raw water, and then mixed with the raw water to eliminate excess oxygen in the returned sludge - some of the organic matter in the raw water It is used for oxidation of oxidation, and air quenching is carried out afterward.
本発明の１実施態様について＠１図を参照しつつ説明す
る。One embodiment of the present invention will be described with reference to Figure @1.
沈殿槽６からの返送汚泥２に、気相部９が密閉され０雪
又に酸素富化ガス８が送気されている改質槽３に流入
せしめ、高濃度のＤｏ（溶存酸素）と接触させたのち、
液面下に配備され次遅通口１０を通って原水混合槽４に
流下せしめる。The returned sludge 2 from the settling tank 6 is allowed to flow into the reforming tank 3, where the gas phase section 9 is sealed and oxygen-enriched gas 8 is supplied, and comes into contact with a high concentration of Do (dissolved oxygen). After letting
It is arranged below the liquid level and flows down into the raw water mixing tank 4 through the next delay port 10.
流入した活性汚泥中のＤＯ［注入される原水１のＢＯＤ
成分あるいはその他の被酸化物質の酸化に利用される。DO in inflow activated sludge [BOD of injected raw water 1]
Used for oxidizing components or other oxidizable substances.
原水１は連通口１０′を経由して次の曝気槽５に流下せ
しめ、空気曝気によって汚濁物質の酸化が終了したのち
、沈殿槽６で活性汚泥が分離され、汚泥の大部分が改質
槽３に返送され、残部は余剰汚泥７として処理、処分さ
れる。Ｏｌ 又は酸素富化ガス８の供給量は気相部９の
酸素濃度が５ｏｔｓ以上、あるいは液相部のＤＯが１０
ｑ／Ｌ以上となるように自動制御するとよい。The raw water 1 flows down to the next aeration tank 5 via the communication port 10', and after the oxidation of pollutants is completed by air aeration, activated sludge is separated in the settling tank 6, and most of the sludge is transferred to the reforming tank. 3, and the remainder is treated and disposed of as surplus sludge 7. The supply amount of Ol or oxygen-enriched gas 8 is such that the oxygen concentration in the gas phase 9 is 5 ots or more, or the DO in the liquid phase is 10
It is preferable to automatically control the amount to be equal to or greater than q/L.
連通口１０．１０’框水面下５０〜３００１程度の浅い
位置に配備し、連通口１０を連通口１０′よりも５〇−
程度下に配置するとよい。これによって気相部９の圧力
上昇による液面の低下及び槽壁の損傷を防止することが
できる。気相部９が減圧になったときは０３ 又は酸
素富化ガスを供給すればよく、気相部９′の圧力が減少
したときに圧力調整弁１１を開放して空気を導入するこ
とによって圧力調整を行うことができる。Communication port 10.10' is located at a shallow position approximately 50 to 3001 below the water surface, and the communication port 10 is 50-300m below the water surface.
It is best to place it at a lower level. This makes it possible to prevent a drop in the liquid level and damage to the tank wall due to an increase in pressure in the gas phase section 9. When the pressure in the gas phase section 9 is reduced, it is sufficient to supply 03 or oxygen-enriched gas, and when the pressure in the gas phase section 9' is reduced, the pressure can be increased by opening the pressure regulating valve 11 and introducing air. Adjustments can be made.
改質槽、原水混合槽の容積は返送汚泥濃度、廃水の種類
によって異なってくるか、それぞれの槽３，４で流入液
に対し２〜３時間、°α５時間程度の滞留を目安すると
よい。本発明でハｏ寓ガスの他、５０僑以上の酸素ガス
を含有する酸素富化ガス（空気よりも酸素濃度の高いガ
ス）を用いてもよい。The volumes of the reforming tank and the raw water mixing tank will vary depending on the concentration of returned sludge and the type of wastewater, and it is recommended that the influent be retained in each tank 3 and 4 for about 2 to 3 hours, or about 5 hours. In the present invention, an oxygen-enriched gas (a gas with a higher oxygen concentration than air) containing 50% or more oxygen gas may be used in addition to the gas.
実施例
第１図に示した処理装置を用いて次の条件で食品廃水を
処理し念結果を第１表に示す。EXAMPLE Food wastewater was treated using the treatment apparatus shown in FIG. 1 under the following conditions, and the preliminary results are shown in Table 1.
液相部 気相部
改質槽容積 （ｌＬｌｏｍ” １０６
５ｍ”（α４０ｍφＸ＆８０ｍｈ） （１４０ｍφ×
α５０ｍｈ）原水混合槽容積 α０５０ｍ”
α０１９−（α２ＳｍφＸαｐｓｍｈ）
（α２，６ｍ１１ＩＸａ３５ｍｂ）曝気槽容積
（Ｌ５０ｔｔ” −（ＩＩＬ５ｍｈＸＬ４５
ｍＩａＸα７ｍｈ） −廃水処理ｉ １
．７〜１．９ ｑ”７日廃水Ｂ ＯＤ ３２
０〜ａｓｏａｙ／を曝気槽ＭＬＢＢ ４３００
〜４７０（＋ｙ／を水温 ２０℃
返送汚泥量 ｔＯ〜１．１ ｍ”７日ｍ１表
〔発明の効果〕
実施例に示した食品廃水は従来の標準活性汚泥法でｆ＠
ＢＶＸがｓａａ 〜１ａａｏ−７ｔと高くなル、沈殿池
からしばしばＢＳが溢流するトラブルを生じた。しかし
ながら本発明によって汚泥の沈降性を著しく改良するこ
とができた。Liquid phase part Gas phase reforming tank volume (lLlom" 106
5m” (α40mφX & 80mh) (140mφ×
α50mh) Raw water mixing tank volume α050m”
α019-(α2SmφXαpsmh)
(α2,6m11IXa35mb) Aeration tank volume
(L50tt" - (IIL5mhXL45
mIaXα7mh) -Wastewater treatment i 1
．． 7-1.9 q”7-day wastewater B OD 32
0~asoay/Aeration tank MLBB 4300
~470 (+y/ water temperature 20℃ Returned sludge amount tO ~ 1.1 m" 7 days m1 Table [Effects of the invention] Food wastewater shown in the example was processed using the conventional standard activated sludge method.
When the BVX was as high as saa to 1aao-7t, problems often occurred in which BS overflowed from the settling tank. However, according to the present invention, the settling properties of sludge could be significantly improved.
しかも酸素を１００％利用できるので経済的にも有利で
ある。Furthermore, since 100% oxygen can be used, it is economically advantageous.
を九〇ｌ ガスの代りに酸素濃度５０ｓ以上の酸素富化
ガスを用いても同様の効果をあげることができた。A similar effect could be obtained by using an oxygen-enriched gas with an oxygen concentration of 50 seconds or more instead of 90L gas.
第１図は本発明方法を説明するためのフロー概略図であ
る。
１・・・原水、２・・・返送汚泥、３・・・改質槽、４
・・・原水混合槽、５・・・曝気槽、６・・・μ殿槽、
１２・・・酸素発生器。
特許出願人 荏原インフィルコ株式会社同 株式
会社荏原樋合研究所FIG. 1 is a schematic flow diagram for explaining the method of the present invention. 1... Raw water, 2... Return sludge, 3... Reforming tank, 4
...Raw water mixing tank, 5...Aeration tank, 6...μ tank,
12...Oxygen generator. Patent applicant Ebara Infilco Co., Ltd. Ebara Higo Research Institute Co., Ltd.
Claims (1)
て、返送汚泥を密閉式水槽中で気相部に送気される酸素
ガス又は酸素富化ガスと接触させた後有機性廃水と混合
し、該返送汚泥中の溶存酸素を除去し、しかる後空気曝
気することを特徴とする有機性廃水の活性汚泥処理法。1. In a method of treating organic wastewater by the activated sludge method, the returned sludge is brought into contact with oxygen gas or oxygen-enriched gas fed to the gas phase in a closed water tank, and then mixed with the organic wastewater, A method for treating organic wastewater with activated sludge, which comprises removing dissolved oxygen from the returned sludge and then aerating it with air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291731A JPH01135594A (en) | 1987-11-20 | 1987-11-20 | Treatment of organic waste water with active sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291731A JPH01135594A (en) | 1987-11-20 | 1987-11-20 | Treatment of organic waste water with active sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135594A true JPH01135594A (en) | 1989-05-29 |
| JPH0240400B2 JPH0240400B2 (en) | 1990-09-11 |
Family
ID=17772668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62291731A Granted JPH01135594A (en) | 1987-11-20 | 1987-11-20 | Treatment of organic waste water with active sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01135594A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013248566A (en) * | 2012-05-31 | 2013-12-12 | Panasonic Corp | Membrane separation activated sludge process and reforming method of activated sludge |
-
1987
- 1987-11-20 JP JP62291731A patent/JPH01135594A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013248566A (en) * | 2012-05-31 | 2013-12-12 | Panasonic Corp | Membrane separation activated sludge process and reforming method of activated sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0240400B2 (en) | 1990-09-11 |
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