JPS6147597B2 - - Google Patents
Info
- Publication number
- JPS6147597B2 JPS6147597B2 JP9538578A JP9538578A JPS6147597B2 JP S6147597 B2 JPS6147597 B2 JP S6147597B2 JP 9538578 A JP9538578 A JP 9538578A JP 9538578 A JP9538578 A JP 9538578A JP S6147597 B2 JPS6147597 B2 JP S6147597B2
- Authority
- JP
- Japan
- Prior art keywords
- activated sludge
- waste liquid
- aeration tank
- conduit
- 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 59
- 239000007788 liquid Substances 0.000 claims description 38
- 238000005273 aeration Methods 0.000 claims description 33
- 239000002699 waste material Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 23
- 238000004062 sedimentation Methods 0.000 claims description 11
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 229910001882 dioxygen Inorganic materials 0.000 claims description 9
- 241000894006 Bacteria Species 0.000 claims description 8
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 8
- 244000005700 microbiome Species 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 235000014655 lactic acid Nutrition 0.000 description 4
- 239000004310 lactic acid Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 235000013361 beverage Nutrition 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000590020 Achromobacter Species 0.000 description 1
- 241000588986 Alcaligenes Species 0.000 description 1
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 241000193755 Bacillus cereus Species 0.000 description 1
- 241000589519 Comamonas Species 0.000 description 1
- 241000186216 Corynebacterium Species 0.000 description 1
- 241000588722 Escherichia Species 0.000 description 1
- 241000192041 Micrococcus Species 0.000 description 1
- 241000187654 Nocardia Species 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000015097 nutrients Nutrition 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
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005406 washing Methods 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
- Biological Treatment Of Waste Water (AREA)
- 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方法に
関するものである。詳しく述べると、腐敗性廃液
の活性汚泥法による処理方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating waste liquid using an activated sludge method. More specifically, the present invention relates to a method for treating putrefactive waste liquid using an activated sludge method.
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
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. Treatment of waste liquid that is artificially manipulated so as to bring the substrate into sufficient contact with flocs composed of microorganisms of different solid groups in the presence of dissolved oxygen, and aerobically oxidize and decompose the flocs. This method 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.
しかるに、乳酸飲料廃液、例えば回収された乳
酸飲料容器の洗浄廃液等のごとき腐敗性廃液を活
性汚泥法により処理する場合には、廃液中の
BOD等の濃度が極めて高く、しかも酸性度が高
いので、通常使用される活性汚泥を使用すると、
極めて多量を必要とするため大容量の処理装置を
必要とするばかりでなく、活性汚泥自体が死滅し
てしまう恐れがある。このため耐酸性の活性汚泥
を使用すると、該汚泥による栄養分の分解性は良
好となるがフロツクの形成による凝集性が低下す
ることになる。一方、活性汚泥法が浄化機能をも
つたプロセスとして成り立つためには、活性汚泥
中に生息している微生物によつて凝集、沈降性の
良好なフロツクが形成されなければならない。し
たがつて前記耐酸性の活性汚泥によつては、浄化
機能の優れた活性汚泥法を構成することはできな
い。 However, when treating lactic acid beverage waste liquid, such as waste liquid from washing recovered lactic acid drink containers, by the activated sludge method, the
Since the concentration of BOD etc. is extremely high and the acidity is high, when normally used activated sludge is used,
Since an extremely large amount is required, not only a large-capacity processing device is required, but also there is a risk that the activated sludge itself may be destroyed. For this reason, when acid-resistant activated sludge is used, the decomposition of nutrients by the sludge is improved, but flocculation is reduced due to the formation of flocs. On the other hand, in order for the activated sludge method to function as a process with a purification function, microorganisms living in the activated sludge must form flocs with good flocculation and sedimentation properties. Therefore, the acid-resistant activated sludge cannot constitute an activated sludge method with an excellent purification function.
また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、曝気槽に循環する方法は知られ
ている（特開昭52−3267号）。しかしながら、こ
のような方法では連続的な処理な困難であるばか
りでなく、斜面に付着する活性汚泥の移送は極め
て困難であつて、この個所で活性汚泥が死滅する
恐れがある。 It also forms flocs and coagulates in the sedimentation tank.
A method is known in which the settled activated sludge is forcibly stirred by intermittent air lift and circulated into an aeration tank (Japanese Patent Laid-Open No. 52-3267). However, with this method, not only is continuous treatment difficult, but it is also extremely difficult to transport the activated sludge adhering to the slope, and 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、耐酸性活性
汚泥の固定床を設けた前曝気槽に処理されるべき
廃液を供給し分子状酸素を供給しながら曝気処理
し、ついでその処理液をフロツク形成菌を主成分
とする活性汚泥の存在する主曝気槽に供給し分子
状酸素を供給しながら曝気処理し、さらにその処
理液を沈降槽に供給して静置し、沈降した活性汚
泥をエアリフトにより主曝気槽に循環する活性汚
泥法による廃液の処理方法であり、該方法により
装置の小型化および高汚泥濃度での高負荷運転が
できるばかりでなく、腐敗性廃液の処理において
も活性汚泥の死滅をきたすことなく、優れた浄化
機能をはたすのである。 However, the present invention has been made to improve the various drawbacks of the conventional method as described above, and involves supplying the waste liquid to be treated to a pre-aeration tank equipped with a fixed bed of acid-resistant activated sludge and supplying molecular oxygen. The treated liquid is then supplied to the main aeration tank where activated sludge containing floc-forming bacteria as a main component is present, aerated while supplying molecular oxygen, and the treated liquid is further supplied to the settling tank. This is a waste liquid treatment method using the activated sludge method, in which the activated sludge is left to stand still, and the settled activated sludge is circulated to the main aeration tank using an air lift. In addition, even in the treatment of putrefactive waste liquid, activated sludge does not die and performs an excellent purification function.
耐酸性活性汚泥としては、例えばアクロモバク
テル、アエロバクテル、アルカリゲネス、バチラ
ス、バクテリウム、コリネバクテリウム、コマモ
ナス、ミクロコツカス、ノカルデイア、ブソイド
モナス等が知られており、前曝気槽では固定床と
して1000ppm以上の汚泥濃度で使用される。 Examples of acid-resistant activated sludge include Achromobacter, Aerobacter, Alcaligenes, Bacillus, Bacterium, Corynebacterium, Comamonas, Micrococcus, Nocardia, Busoidmonas, etc., and are used as fixed beds in pre-aeration tanks at sludge concentrations of 1000 ppm or more. be done.
一方、フロツク形成菌としては、例えばズーグ
レアラミゲラ、バチラスセレウス、エシエリチア
インターミデイウム、パラコロバクテウムアエロ
ゲノイズ、ノカルデイアアクテイノモルフア、フ
ラヴオバテリウム sp、エシエリチアコリ、エ
シエリチアフウンデイー等が知られており、主曝
気槽では4000〜6000ppmの汚泥濃度で使用され
る。 On the other hand, floc-forming bacteria include, for example, Zooglaia ramigera, Bacillus cereus, Escherichia intermedium, Paracolobacteum aerogenois, Nocaldia acteinomorpha, Flavobaterium sp, Escherichia coli, and Escherichia coli. Eritsia Foundation and others are known, and are used at a sludge concentration of 4000 to 6000 ppm in the main aeration tank.
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
性汚泥床１０が固定床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を経て下部より空気、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. This pre-aeration tank 9 is provided with an acid-resistant activated sludge bed 10 as a fixed bed. Before this, molecular oxygen such as air or pure oxygen is bubbled out from the lower part of the aeration tank 9 from the blower 11 through the valve V 2 , the flow meter F 2 and the conduit 12 to aerate the waste liquid being supplied. It is done.
曝気処理された上澄板は、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。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
管１７より系外に排出される。沈降槽１５におい
て底部に沈降してくる活性汚泥は、ブロワー１１
より弁V4、流量計F4および導管１８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導管
１９を経て主曝気槽１３に連続的に循環されて使
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
中間斜面に付着しやすく、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、この沈降槽１５には、別途ブロ
ワー１１より弁V5、流量計F5および導管２０を
経て中間部に供給される前記分子状酸素によるエ
アリフトにより導管２１を経て仕切板２２で仕切
られた沈降槽１５の上端域２３に活性汚泥ととも
に移送されて酸素と接触される。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。 The aerated supernatant plate 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. As a result, the activated sludge that forms flocs and coagulates and separates from the treated liquid.
The supernatant plate overflows into the trough 16 and is separated.
This completely treated waste liquid is discharged from the system through a conduit 17. The activated sludge that settles to the bottom of the settling tank 15 is removed by the blower 11.
The air is then continuously circulated to the main aeration tank 13 via the conduit 19 by the airlift caused by the molecular oxygen supplied from the valve V 4 , the flow meter F 4 and the conduit 18 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 intermediate slope, and the adhered activated sludge tends to die due to lack of oxygen, so this is prevented. For this purpose, the sedimentation tank 15 is partitioned with a partition plate 22 via a conduit 21 by an air lift caused by the molecular oxygen, which is supplied from a blower 11 to the intermediate portion via a valve V 5 , a flowmeter F 5 and a conduit 20 . The activated sludge is transferred together with the activated sludge to the upper end area 23 of the sedimentation tank 15, where it is brought into contact with oxygen. Incidentally, excess sludge is discharged from the settling tank 15 to the outside of the system via a valve 24 and a conduit 25.
一方、前記廃液は、貯槽４にブロワー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, the molecular oxygen is bubbled out from the lower part of the waste liquid from the blower 11 through the valve V 1 , the flow meter F 1 and the conduit 26 into the storage tank 4 .
以上述べたように、本発明の活性汚泥法による
廃液の処理方法は、まず耐酸性活性汚泥により処
理を行なうので、腐敗性の高濃度廃液であつても
活性汚泥を死滅させることなく分解処理が行なわ
れ、しかも、この汚泥は固定床式であるので、装
置を小型にすることができる。また分解処理され
た廃液はフロツク形成菌を主成分とする活性汚泥
で処理されるので、充分なフロツク形成が行なわ
れるばかりでなく、前曝気槽で前処理が行なわれ
ているので、この活性汚泥の死滅の問題は生じな
い。また、沈降槽における沈降汚泥はエアリフト
により主曝気槽に連続的に循環されるので、汚泥
の移送は円滑に行なわれる。さらに、沈降槽斜面
部に凝集付着する活性汚泥はエアリフトにより連
続的に表面部に循環するので、汚泥は常に酸素と
接触して死滅化が防止されている。 As described above, in the method for treating waste liquid using the activated sludge method of the present invention, the treatment is first performed using acid-resistant activated sludge, so even if the waste liquid is highly concentrated and putrefactive, it can be decomposed without killing the activated sludge. Moreover, since this sludge is of a fixed bed type, the equipment can be made compact. In addition, since the decomposed waste liquid is treated with activated sludge whose main component is floc-forming bacteria, not only sufficient floc formation is carried out, but also pre-treatment is carried out in the pre-aeration tank, so the activated sludge is The problem of extinction does not arise. Further, since the settled sludge in the settling tank is continuously circulated to the main aeration tank by the air lift, the sludge is transferred smoothly. Furthermore, since the activated sludge that coagulates and adheres to the slope of the sedimentation tank is continuously circulated to the surface by the air lift, the sludge is constantly in contact with oxygen and is prevented from dying.
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である回収され
た乳酸飲料用容器の洗浄廃液を導管１により廃液
貯槽４に2.5m3／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３Kg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からの空気によりエアリフトにより導管
１９により凝集沈降した活性汚泥が底部より2.5
Kg/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の中間斜面に凝集付着する
活性汚泥は導管２１エアリフトにより沈降槽１５
の上端域２３に循環された。なお、余剰汚泥は導
管２５より系外に排出させた。このようにして処
理された廃液はトラフ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、BOD20ppm、COD50ppmおよび汚濁成分
20ppmであつた。Example Using the device shown in the drawing, at PH4-6
The recovered lactic acid beverage container cleaning waste liquid containing BOD 3000 ppm, COD 1000 ppm (potassium permanganate method), and pollutants 2000 ppm is introduced into waste liquid storage tank 4 through conduit 1 at a rate of 2.5 m 3 /day. A small amount of air was bubbled 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. This pre-aeration tank (volume: 1 m 3 ) was provided with 3 kg of acid-resistant activated sludge as a fixed bed. During this time, air is pumped into this waste liquid from conduit 12 at a rate of 3 m 3 /
Aeration treatment was performed by bubbling at a rate of hr. 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 transferred to the main aeration tank 13.
The activated sludge is sent from the top to the sedimentation tank 15 and left to stand still, during which time the activated sludge coagulates and settles through the conduit 19 due to the air lift from the conduit 18, and the activated sludge is sent to the sedimentation tank 15 from the bottom.
It was circulated to the main aeration tank 13 at a rate of Kg/hr. The sludge concentration in the main aeration tank 13 was 4000 to 6000 ppm. Meanwhile, the activated sludge that coagulates and adheres to the intermediate slope of the settling tank due to the air lift from the conduit 20 is transferred to the settling tank 15 by the air lift from the conduit 21.
It was circulated to the upper end area 23 of . Incidentally, the excess sludge was discharged from the system through the conduit 25. The waste liquid treated in this way is caused to overflow into the trough 16 and into the conduit 17.
However, this treated waste liquid had a pH of 6~
7.5, BOD20ppm, COD50ppm and pollution components
It was 20ppm.
図面は、本発明方法の一実施例を示すフローシ
ートである。
４……廃液貯槽、９……前曝気槽、１０……活
性汚泥固定床、１１……ブロワー、１３……主曝
気槽、１５……沈降槽。
The drawing is a flow sheet showing one embodiment of the method of the present invention. 4... Waste liquid storage tank, 9... Pre-aeration tank, 10... Activated sludge fixed bed, 11... Blower, 13... Main aeration tank, 15... Sedimentation tank.
Claims (1)
処理されるべき廃液を供給し分子状酸素を供給し
ながら曝気処理し、ついでその処理液をフロツク
形成菌を主成分とする活性汚泥の存在する主曝気
槽に供給し分子状酸素を供給しながら曝気処理
し、さらにその処理液を沈降槽に供給して静置
し、沈降した活性汚泥をエアリフトにより主曝気
槽に循環することを特徴とする活性汚泥による廃
液の処理方法。 ２ 耐酸性活性汚泥は1000ppm以上の濃度で使
用される特許請求の範囲第１項に記載の方法。 ３ フロツク形成菌を主成分とする活性汚泥は
4000〜6000ppmの濃度で使用される特許請求の
範囲第１項または第２項に記載の方法。[Scope of Claims] 1. A waste liquid to be treated is supplied to a pre-aeration tank equipped with a fixed bed of acid-resistant activated sludge, and aerated while supplying molecular oxygen. Activated sludge as a component is supplied to the main aeration tank where it is present, and aerated while supplying molecular oxygen.The treated liquid is then supplied to the sedimentation tank and left to stand, and the settled activated sludge is sent to the main aeration tank by air lift. A method for treating waste liquid using activated sludge, which is characterized in that the waste liquid is recycled. 2. The method according to claim 1, wherein the acid-resistant activated sludge is used at a concentration of 1000 ppm or more. 3 Activated sludge whose main component is floc-forming bacteria is
A method according to claim 1 or 2, which is used at a concentration of 4000 to 6000 ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9538578A JPS5522324A (en) | 1978-08-07 | 1978-08-07 | Waste liquid treatment using active sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9538578A JPS5522324A (en) | 1978-08-07 | 1978-08-07 | Waste liquid treatment using active sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5522324A JPS5522324A (en) | 1980-02-18 |
| JPS6147597B2 true JPS6147597B2 (en) | 1986-10-20 |
Family
ID=14136171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9538578A Granted JPS5522324A (en) | 1978-08-07 | 1978-08-07 | Waste liquid treatment using active sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5522324A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939391A (en) * | 1982-08-31 | 1984-03-03 | Kurita Water Ind Ltd | Treatment of organic waste water with activated sludge |
| JP2590474B2 (en) * | 1987-04-10 | 1997-03-12 | 日本鋼管株式会社 | Wastewater treatment method |
| JP4848139B2 (en) * | 2005-05-23 | 2011-12-28 | 隆喜 栂 | Aeration tank structure |
| JP6020620B2 (en) * | 2015-02-19 | 2016-11-02 | 栗田工業株式会社 | Biological treatment method and apparatus for organic wastewater |
| CN112912345B (en) * | 2018-10-17 | 2024-04-12 | 荏原实业株式会社 | Biological treatment device and biological treatment method for organic wastewater |
-
1978
- 1978-08-07 JP JP9538578A patent/JPS5522324A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5522324A (en) | 1980-02-18 |
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