JPS6147595B2 - - Google Patents
Info
- Publication number
- JPS6147595B2 JPS6147595B2 JP53095386A JP9538678A JPS6147595B2 JP S6147595 B2 JPS6147595 B2 JP S6147595B2 JP 53095386 A JP53095386 A JP 53095386A JP 9538678 A JP9538678 A JP 9538678A JP S6147595 B2 JPS6147595 B2 JP S6147595B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- aeration tank
- conduit
- activated sludge
- settling tank
- 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
- 239000010802 sludge Substances 0.000 claims description 48
- 238000005273 aeration Methods 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 39
- 239000002699 waste material Substances 0.000 claims description 27
- 238000004062 sedimentation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 6
- 229910001882 dioxygen Inorganic materials 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 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)
Description
【発明の詳細な説明】
本発明は、活性汚泥法による廃液の処理装置に
関するものである。詳しく述べると、増殖する活
性汚泥の沈降槽における堆積による死滅のない活
性汚泥法による廃液の処理装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waste liquid treatment apparatus using an activated sludge method. More specifically, the present invention relates to a waste liquid treatment apparatus using an activated sludge method in which the activated sludge that proliferates does not die due to accumulation in a sedimentation tank.
活性汚泥法は、浄化機能を有するフロツク状の
生物増殖体を、必要に応じて生物反応系内で絶え
ず循環し、曝気槽内で基質（排水中のBOD成
分）と浄化微生物の比率が常に一定となるように
人為的に操作し、溶存酸素の存在下に基質と異種
固体群の微生物によつて構成されるフロツクとを
充分接触させて、これを好気的に酸化、分解する
ことによる廃液の処理方法であり、現在広く行な
われている。すなわち、該方法においては、浄化
微生物に対して適当な栄養バランスのとれた廃液
を曝気槽に導入して一定時間曝気すれば、種々の
好気性微生物が廃液中の有機物を食物として増殖
するが、その間、通気、撹拌、混合等により微生
物や有機質および無機質の浮遊粒子が凝集して廃
液処理に必要な活性汚泥が得られる。 In the activated sludge method, floc-like biological growth bodies with a purifying function are constantly circulated within the biological reaction system as needed, and the ratio of substrate (BOD component in wastewater) to purifying microorganisms is always constant in the aeration tank. The waste liquid is produced by artificially manipulating the substrate and flocs composed of microorganisms of different solid groups in the presence of dissolved oxygen, and aerobically oxidizing and decomposing the flocs. This is a treatment method that is currently widely used. That is, in this method, if a waste liquid with an appropriate nutritional balance for purifying microorganisms is introduced into an aeration tank and aerated for a certain period of time, various aerobic microorganisms will multiply using the organic matter in the waste liquid as food. During this time, microorganisms and suspended organic and inorganic particles coagulate due to aeration, stirring, mixing, etc., and activated sludge necessary for wastewater treatment is obtained.
このような活性汚泥法による廃液の処理装置と
しては、原理的には、通常、曝気槽と沈降槽（沈
殿池）とよりなり、曝気槽にて活性汚泥により曝
気処理された廃液は該活性汚泥の一部を伴なつて
沈降槽に流入して静置され、その結果、活性汚泥
はフロツクを形成して沈降槽下部に沈降して処理
された上澄液と分離する。この上澄板は処理液と
して排出されるが、沈降した活性汚泥の大部分は
曝気槽へ返送され、一部分の余剰汚泥は系外へ排
出される。このように沈降槽で沈降した活性汚泥
の曝気槽への返送手段として重力またはエアリフ
トの適用は知られている。例えば、特開昭52−
3267号公報によれば、沈降槽においてフロツクを
形成して凝集、沈降した活性汚泥を間歇的にエア
リフトを作用させて強制撹拌し、曝気槽に循環し
ている。しかしながら、このような方法では連続
的な処理は困難であるばかりでなく、エアリフト
の吸込口を最底部付近に設ける必要があるので、
この部分に堆積する活性汚泥の返送は比較的容易
であるが、該最底部に続くやや上部、すなわち前
記吸込口より上方に位置する斜壁部に付着する活
性汚泥の移送は極めて困難である。したがつて、
この個所で活性汚泥が死滅する恐れがある。 In principle, a waste liquid treatment device using such an activated sludge method normally consists of an aeration tank and a settling tank (sedimentation tank), and the waste liquid that has been aerated with activated sludge in the aeration tank is treated with activated sludge. As a result, the activated sludge forms flocs and settles to the bottom of the settling tank, where they are separated from the treated supernatant liquid. This supernatant plate is discharged as a treated liquid, but most of the settled activated sludge is returned to the aeration tank, and a portion of the excess sludge is discharged outside the system. It is known to use gravity or air lift as a means for returning the activated sludge settled in the settling tank to the aeration tank. For example, JP-A-52-
According to Publication No. 3267, activated sludge that has formed flocs, coagulated, and settled in a settling tank is forcibly stirred by intermittent air lift, and then circulated to an aeration tank. However, with this method, it is not only difficult to perform continuous treatment, but also the suction port of the air lift needs to be installed near the bottom.
Although it is relatively easy to return the activated sludge deposited in this part, it is extremely difficult to transport the activated sludge that adheres to the inclined wall part located slightly above the bottom, that is, located above the suction port. Therefore,
There is a risk that the activated sludge will die at this location.
しかるに、本発明は上記のごとき従来法の諸欠
点を改善するためになされたもので、曝気槽と、
該曝気槽に連設されかつ下部に傾斜壁を有する沈
降槽とよりなる処理装置において、該沈降槽の下
部ないし中間部に吸込口および上部に吐出口を有
するエアリフト用導管を設け、該導管のエアリフ
ト作用により沈降槽内の液を沈降槽上層部に還流
させるとともに沈降槽下部に液流を形成させて汚
泥の堆積を防止する構造よりなる活性汚泥法によ
る廃液の処理装置である。 However, the present invention was made in order to improve the various drawbacks of the conventional method as described above.
In a treatment device comprising a settling tank connected to the aeration tank and having a sloped wall at the bottom, an air lift conduit having a suction port and a discharge port at the top is provided in the lower or middle part of the settling tank, and This is a waste liquid treatment device using the activated sludge method, which has a structure in which the liquid in the settling tank is returned to the upper part of the settling tank by an air lift action, and a liquid flow is formed in the lower part of the settling tank to prevent the accumulation of sludge.
つぎに図面を参照しながら本発明を説明する。
すなわち、図面に示すように、導管１より乳酸飲
料廃液のごとき処理されるべき腐敗性廃液は振動
篩２で過されたのち、導管３より廃液貯槽４に
導入され、ついで導管５よりポンプ６により流量
計７に送られ、さらに導管８を経て前曝気槽９に
供給される。この前曝気槽９には耐酸性活性汚泥
が固定床１０として設けられている。この前曝気
槽９にはブロワー１１より弁V2、流量計F2およ
び導管１２を経て下空より空気、純酸素等のごと
き分子状酸素が泡出されて、供給されている廃液
の曝気処理が行なわれる。 Next, the present invention will be explained with reference to the drawings.
That is, as shown in the drawing, putrefactive waste liquid to be treated, such as lactic acid beverage waste liquid, is passed through a conduit 1 through a vibrating sieve 2, and then introduced into a waste liquid storage tank 4 through a conduit 3, and then passed through a conduit 5 by a pump 6. It is sent to a flow meter 7 and further supplied to a pre-aeration tank 9 via a conduit 8. The pre-aeration tank 9 is provided with a fixed bed 10 of acid-resistant activated sludge. Before this, molecular oxygen such as air or pure oxygen is bubbled out from the lower atmosphere from the blower 11 to the aeration tank 9 via the valve V 2 , the flow meter F 2 and the conduit 12, and the supplied waste liquid is aerated. will be carried out.
曝気処理された上澄液は、前曝気槽９より溢流
して散気式の主曝気槽１３に供給される。この主
曝気槽１３にはフロツク形成菌を主成分とする活
性汚泥が懸濁しており、ブロワー１１より弁
V3、流量計F3および導管１４を経て下部より前
記分子状酸素が泡出されて、供給されている廃液
の曝気処理が行なわれる。主曝気槽１３で処理さ
れた廃液は、その上部より沈降槽１５に送られて
静置される。沈降槽１５は主曝気槽１３に連設さ
れ、その少なくとも下部は傾斜壁２７，２８が形
成されて沈降するフロツクが集合して、後述する
ように、エアリフトや重力により移動しやすいよ
うに構成されている。なお、この沈降槽１５は傾
斜壁２８の下部２９および上部３０において主曝
気槽１３と連通し、上部３０を経由して活性汚泥
を含有する廃液は沈降槽１５に送られる。この結
果、フロツクを形成して凝集した活性汚泥は沈降
して処理液と分離するので、その上澄板はトラフ
１６に溢流して分離される。この完全に処理され
て無害となつた処理廃液は、導官１７より系外に
排出される。 The aerated supernatant liquid overflows from the pre-aeration tank 9 and is supplied to the diffused type main aeration tank 13. In this main aeration tank 13, activated sludge whose main component is floc-forming bacteria is suspended, and the blower 11
The molecular oxygen is bubbled out from the bottom via V 3 , flowmeter F 3 and conduit 14, and the supplied waste liquid is aerated. The waste liquid treated in the main aeration tank 13 is sent from the upper part to the sedimentation tank 15 and left there. The settling tank 15 is connected to the main aeration tank 13, and at least its lower part is formed with inclined walls 27 and 28 so that the settling flocs can gather and be easily moved by air lift or gravity, as will be described later. ing. Note that this settling tank 15 communicates with the main aeration tank 13 at the lower part 29 and upper part 30 of the inclined wall 28, and the waste liquid containing activated sludge is sent to the settling tank 15 via the upper part 30. As a result, the activated sludge that forms flocs and coagulates and is separated from the treatment liquid, and the supernatant plate overflows into the trough 16 and is separated. This completely treated waste liquid, which has become harmless, is discharged from the system through the guide 17.
沈降槽１５において底部に沈降してくる活性汚
泥は、その一部が重力により傾斜壁２８の下部２
９よる主曝気槽１３に返送される。また、沈降槽
１５と主曝気槽１３との間には汚泥吸入口を沈降
槽１５下部にまた吐出口を主曝気槽１３の上部に
有するエアリフト用導管１９が設けられており、
ブロワー１１より弁V4、流量計F4および導管１
８より供給される前記分子状酸素によるエアリフ
トにより沈降した活性汚泥は導管１９を経て主曝
気槽１３に連続的に返送されて使用される。一
方、沈降槽１５においては処理液は静置されるの
で、沈降する活性汚泥のフロツクは中間部ないし
下部の傾斜壁面に付着しやすく、かつ付着した活
性汚泥は酸素不足をきたして死滅しやすいので、
これを防止するために、沈降槽の下部ないし中間
部に吸込口および上部に吐出口を有するエアリフ
ト用導管２１を設け、別途ブロワー１１より弁
V5、流量計F5および導管２０を経て前記導管２
１の吸込口に供給される分子状酸素によるエアリ
フトにより前記導管２１を経て仕切板２２で仕切
られた沈降槽１５の上層部２３に活性汚泥ととも
に移送されて酸素と接触される。その結果、沈降
槽下部には液流が生じて汚泥の堆積は防止され
る。なお、余剰汚泥は沈降槽１５より弁２４およ
び導管２５を経て系外に排出される。この場合の
沈降槽１５内の前記導管２１による循環流の量
は、１時間当り沈降槽表面積１m2当り0.5〜５m3
が好ましく、特に１〜５m3が好ましい。 A part of the activated sludge that settles to the bottom of the settling tank 15 is moved to the lower part 2 of the inclined wall 28 by gravity.
9 is returned to the main aeration tank 13. Furthermore, an air lift conduit 19 having a sludge inlet at the bottom of the settling tank 15 and a discharge port at the top of the main aeration tank 13 is provided between the settling tank 15 and the main aeration tank 13.
From blower 11 valve V 4 , flowmeter F 4 and conduit 1
The activated sludge settled by the airlift caused by the molecular oxygen supplied from 8 is continuously returned to the main aeration tank 13 via a conduit 19 for use. On the other hand, in the sedimentation tank 15, the treated liquid is left standing, so flocs of settled activated sludge tend to adhere to the sloped wall surface in the middle or lower part, and the adhered activated sludge tends to die due to lack of oxygen. ,
In order to prevent this, an air lift conduit 21 having a suction port and a discharge port at the top is provided at the bottom or middle of the settling tank, and a separate valve is connected to the blower 11.
V 5 , flowmeter F 5 and said conduit 2 via conduit 20
Due to the air lift caused by the molecular oxygen supplied to the suction port 1, the activated sludge is transferred together with the activated sludge through the conduit 21 to the upper part 23 of the sedimentation tank 15 partitioned by the partition plate 22, where it is brought into contact with oxygen. As a result, a liquid flow is generated in the lower part of the sedimentation tank, preventing sludge from accumulating. Incidentally, excess sludge is discharged from the settling tank 15 to the outside of the system via a valve 24 and a conduit 25. In this case, the amount of circulating flow through the conduit 21 in the sedimentation tank 15 is 0.5 to 5 m 3 per 1 m 2 of surface area of the sedimentation tank per hour.
is preferable, and particularly preferably 1 to 5 m 3 .
一方、前記廃液は、貯槽４はブロワー１１より
弁V1、流量計F1および導管２６を経て下部より
前記分子状酸素が泡出されている。 On the other hand, in the waste liquid, the molecular oxygen is bubbled out from the lower part of the storage tank 4 from the blower 11 through the valve V 1 , the flow meter F 1 and the conduit 26 .
以上述べたように、本発明の活性汚泥法による
廃液の処理装置は、曝気槽と、該曝気槽に連設さ
れかつ下部に傾斜壁を有する沈降槽とよりなる処
理装置において、該沈降槽の下部ないし中間部に
吸込口および上部に吐出口を有するエアリフト用
導管を設け、該導管のエアリフト作用により沈降
槽内の液を沈降槽上層部に還流させるとともに沈
降槽下部に液流を形成させて汚泥の堆積を防止す
る構造よりなるものであるから、沈降槽の傾斜壁
に凝集付着する活性汚泥はエアリフトにより連続
的に表層部へ循環され、汚泥は常に酸素と接触す
るので死滅化が防止される。また、沈降槽におけ
る沈降汚泥はエアリフトにより曝気槽に循環され
るので、可動部分を少なくすることができ、汚泥
の返送は円滑に行なわれる。さらに、曝気槽を固
定床による前曝気槽および散気式の主曝気槽の二
段曝気槽を用いれば負荷変動を吸収できるので、
安定した運転を行なうことができる。 As described above, the waste liquid treatment device using the activated sludge method of the present invention includes an aeration tank and a settling tank connected to the aeration tank and having an inclined wall at the bottom. An airlift conduit having a suction port and a discharge port at the top is provided at the lower or middle part, and the airlift action of the conduit causes the liquid in the settling tank to flow back to the upper part of the settling tank, and at the same time forms a liquid flow in the lower part of the settling tank. Since the structure is designed to prevent sludge from accumulating, the activated sludge that coagulates and adheres to the sloped wall of the settling tank is continuously circulated to the surface layer by airlift, and the sludge is constantly in contact with oxygen, preventing it from dying. Ru. Further, since the settled sludge in the settling tank is circulated to the aeration tank by an air lift, the number of moving parts can be reduced, and the sludge can be returned smoothly. Furthermore, load fluctuations can be absorbed by using a two-stage aeration tank with a fixed-bed pre-aeration tank and a diffused main aeration tank.
Stable operation can be performed.
つぎに、実施例を挙げて本発明方法をさらに詳
細に説明する。 Next, the method of the present invention will be explained in more detail with reference to Examples.
実施例
図面に示す装置を用いてPH４〜６で
BOD3000ppm、COD1000ppm（過マンガン酸カ
リ法）および汚濁成分2000ppmである乳酸飲料
用容器の洗浄液を導管１により廃液貯槽４に2.5
m3／日の割合で導入し、この廃液中には廃液の腐
敗を防止するために必要に応じ、導管２６より少
量の空気を泡出させた。ついで、ポンプ６により
この廃液を導管８より前記曝気槽９に供給した。
この前曝気槽（容積１m3）には耐酸性活性汚泥３
Kgが固定床として設けられている。この間、この
廃液中には導管１２より空気を３m3/hrの割合で
泡出させて曝気処理を行なつた。曝気処理された
上澄板は2.5m3／日の割合で溢流により散気式の
主曝気槽１３に導入された。この主曝気槽１３に
はフロツク形成菌を主成分とする活性汚泥が懸濁
されていた。このフロツク形成菌を観察したとこ
ろ、セン毛虫類、ベン毛虫類等が主として認めら
れた。この主曝気槽１３には、さらに導管１４に
より空気を５m3/hrの割合で泡出させて曝気処理
を行なつた。処理廃液は、主曝気槽１３上部から
沈降槽１５に送られて静置され、この間導管１８
からの空気によるエアリフトにより導管１９によ
り凝集沈降した活性汚泥法が底部より2.5Kg/hrの
割合で主曝気槽１３に循環された。主曝気槽１３
内の汚泥濃度は4000〜6000ppmであつた。一
方、その間に導管２０からの空気によるエアリフ
トにより沈降槽１５の中間傾斜壁面に凝集付着す
る活性汚泥は、導管２０からの空気によるエアリ
フトにより導管２１により1.5m3/m2hrの割合で沈
降槽１５の上層部２３に循環された。このように
して処理された廃液は、トラフト１６に溢流させ
て導管１７より系外に排出させたが、この処理廃
液はPH６〜7.5、BOD20pppm、COD50ppmおよ
び汚濁成分20ppmであつた。Example Using the device shown in the drawing, at PH4-6
A lactic acid beverage container cleaning solution containing BOD 3000ppm, COD 1000ppm (potassium permanganate method), and contaminants 2000ppm is transferred to waste liquid storage tank 4 through conduit 1.
m 3 /day, and a small amount of air was bubbled into the waste liquid through conduit 26 as necessary to prevent spoilage of the waste liquid. Next, this waste liquid was supplied to the aeration tank 9 through a conduit 8 by a pump 6.
Before this, the aeration tank (volume 1m3 ) was filled with acid-resistant activated sludge.
Kg is provided as a fixed bed. During this time, air was bubbled into the waste liquid from the conduit 12 at a rate of 3 m 3 /hr to carry out aeration treatment. The aerated supernatant plate was introduced into the diffused type main aeration tank 13 by overflow at a rate of 2.5 m 3 /day. Activated sludge containing floc-forming bacteria as a main component was suspended in the main aeration tank 13. When the floc-forming bacteria were observed, it was mainly found that the flocculata and the caterpillars were found. This main aeration tank 13 was further aerated by bubbling air through a conduit 14 at a rate of 5 m 3 /hr. The treated waste liquid is sent from the upper part of the main aeration tank 13 to the sedimentation tank 15 and left standing, and during this time the conduit 18
Activated sludge, which was flocculated and settled by conduit 19, was circulated from the bottom to main aeration tank 13 at a rate of 2.5 kg/hr by airlift from air. Main aeration tank 13
The sludge concentration inside was 4000-6000ppm. Meanwhile, the activated sludge that coagulates and adheres to the intermediate inclined wall surface of the sedimentation tank 15 due to the air lift from the conduit 20 is transferred to the sedimentation tank by the conduit 21 at a rate of 1.5 m 3 /m 2 hr. It was circulated to the upper layer 23 of 15. The waste liquid treated in this manner overflowed into the trough 16 and was discharged outside the system through the conduit 17, and the treated waste liquid had a pH of 6 to 7.5, a BOD of 20 ppm, a COD of 50 ppm, and a pollutant component of 20 ppm.
図面は、本発明装置の一実施例の概略を示す原
理図である。
９……前曝気槽、１０……活性汚泥固定床、１
１……ブロワー、１３……主曝気槽、１５……沈
降槽、１９……汚泥返送用エアリフト導管、２１
……汚泥循環用エアリフト導管、２７，２８……
沈降槽傾斜壁。
The drawing is a principle diagram showing an outline of an embodiment of the device of the present invention. 9... Pre-aeration tank, 10... Activated sludge fixed bed, 1
1... Blower, 13... Main aeration tank, 15... Sedimentation tank, 19... Air lift conduit for sludge return, 21
...Air lift conduit for sludge circulation, 27, 28...
Sedimentation tank sloped wall.
Claims (1)
斜壁を有する沈降槽とよりなる処理装置におい
て、該沈降槽の下部ないし中間部に吸込口および
上部に吐出口を有するエアリフト用導管を設け、
該導管のエアリフト作用により沈降槽内の液を沈
降槽上層部に還流させるとともに沈降槽下部に液
流を形成させて汚泥の堆積を防止する構造よりな
る活性汚泥法による廃液の処理装置。 ２ 還流量は１時間当り沈降槽表面積１m2当り１
〜５m3である特許請求の範囲第１項に記載の処理
装置。 ３ 沈降槽下部と曝気槽上部との間には、汚泥返
送を行なうためのエアリフト用導管が設けられて
なる特許請求の範囲第１項または第２項に記載の
処理装置。 ４ 曝気槽は固定床式前曝気槽と散気式主曝気槽
とよりなる特許請求の範囲第１項ないし第３項の
いずれか一つに記載の処理装置。[Scope of Claims] 1. A treatment device comprising an aeration tank and a settling tank connected to the aeration tank and having a sloped wall at the bottom, which has a suction port at the bottom or middle part of the settling tank and a discharge port at the top. Provide an air lift conduit having a
A waste liquid treatment device using an activated sludge method, which has a structure in which the liquid in the settling tank is returned to the upper part of the settling tank by the air lift action of the conduit, and a liquid flow is formed in the lower part of the settling tank to prevent the accumulation of sludge. 2 The reflux rate is 1 per 1 m2 of sedimentation tank surface area per hour.
5. The processing device according to claim 1, which has a volume of 5 m 3 . 3. The treatment apparatus according to claim 1 or 2, wherein an air lift conduit for returning sludge is provided between the lower part of the settling tank and the upper part of the aeration tank. 4. The processing apparatus according to any one of claims 1 to 3, wherein the aeration tank includes a fixed-bed pre-aeration tank and a diffused main aeration tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9538678A JPS5522325A (en) | 1978-08-07 | 1978-08-07 | Waste liquid treatment using active sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9538678A JPS5522325A (en) | 1978-08-07 | 1978-08-07 | Waste liquid treatment using active sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5522325A JPS5522325A (en) | 1980-02-18 |
| JPS6147595B2 true JPS6147595B2 (en) | 1986-10-20 |
Family
ID=14136201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9538678A Granted JPS5522325A (en) | 1978-08-07 | 1978-08-07 | Waste liquid treatment using active sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5522325A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265399A (en) * | 1989-04-05 | 1990-10-30 | Matsushita Electric Ind Co Ltd | Low leakage magnetic flux speaker |
| JPH02268598A (en) * | 1989-04-11 | 1990-11-02 | Matsushita Electric Ind Co Ltd | Low leak magnetic flux type speaker |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4848139B2 (en) * | 2005-05-23 | 2011-12-28 | 隆喜 栂 | Aeration tank structure |
-
1978
- 1978-08-07 JP JP9538678A patent/JPS5522325A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265399A (en) * | 1989-04-05 | 1990-10-30 | Matsushita Electric Ind Co Ltd | Low leakage magnetic flux speaker |
| JPH02268598A (en) * | 1989-04-11 | 1990-11-02 | Matsushita Electric Ind Co Ltd | Low leak magnetic flux type speaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5522325A (en) | 1980-02-18 |
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