JPH0777640B2 - Dephosphorization device - Google Patents
Dephosphorization deviceInfo
- Publication number
- JPH0777640B2 JPH0777640B2 JP61227863A JP22786386A JPH0777640B2 JP H0777640 B2 JPH0777640 B2 JP H0777640B2 JP 61227863 A JP61227863 A JP 61227863A JP 22786386 A JP22786386 A JP 22786386A JP H0777640 B2 JPH0777640 B2 JP H0777640B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- phosphorus
- sludge
- air
- 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.)
- Expired - Fee Related
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
- Removal Of Specific Substances (AREA)
Description
【発明の詳細な説明】 ＜技術分野＞ 本発明は脱リン装置に関し、特に生物学的脱リン処理か
ら発生する余剰汚泥等の中に持ち込まれたリンの除去装
置に関する。Description: TECHNICAL FIELD The present invention relates to a dephosphorization apparatus, and more particularly to an apparatus for removing phosphorus brought into excess sludge and the like generated from biological dephosphorization treatment.
＜従来技術＞ 一般に、し尿、下水、排水等の原水あるいはその活性汚
泥処理から発生する余剰汚泥中には、原水中のリンが汚
泥微生物の増殖に必要な成分として取り込まれている。
また、特に生物脱リン処理から発生する余剰汚泥中には
多量のリンが取り込まれている。このような余剰汚泥は
（最初沈澱汚泥と共に混合汚泥として）嫌気性消化（メ
タン醗酵）すると、汚泥中のリンは脱離液中に溶出して
しまう。従来、この脱離液は最初沈澱池へ返流され、活
性汚泥処理工程へ循環している。従つて、せつかく汚泥
中に取り込み濃縮したリンが汚泥処理工程を経由して処
理施設内を循環し、実質的なリンの除去が達成されない
ものであつた。<Prior Art> In general, raw water such as human waste, sewage, waste water, etc. or excess sludge generated from the activated sludge treatment thereof incorporates phosphorus in the raw water as a component necessary for the growth of sludge microorganisms.
In addition, a large amount of phosphorus is incorporated in the excess sludge generated particularly from the biological dephosphorization process. When such excess sludge is mixed with the settled sludge (mixed sludge first) by anaerobic digestion (methane fermentation), phosphorus in the sludge is eluted into the desorbed liquid. Conventionally, this desorbed liquid is first returned to the sedimentation tank and circulated to the activated sludge treatment process. Therefore, the phosphorus that was taken up into the sludge and concentrated was circulated in the treatment facility via the sludge treatment process, and the substantial removal of phosphorus was not achieved.
従来、リンの処理施設内循環を断ち切る方法の１つとし
て消化脱離液に消石灰を加え、リンをリン酸カルシウム
として沈澱除去する手段があるが、これによると脱離液
中に多量に含まれる炭酸塩に対してもカルシウムが反応
するために多量の石灰を必要とし、さらに炭酸カルシウ
ムの汚泥が多量に発生し、汚泥処理の負担も増大すると
いう問題点を有するものであつた。Conventionally, there is a method of adding slaked lime to digestive desorption solution to precipitate and remove phosphorus as calcium phosphate as one of the methods for cutting off the circulation of phosphorus in the processing facility. According to this method, carbonate contained in a large amount in the desorption solution. However, there is a problem that a large amount of lime is required for the calcium to react, and a large amount of calcium carbonate sludge is generated, which also increases the burden of sludge treatment.
＜目 的＞ 本発明は上記した如き従来の問題点を改善し、活性汚泥
処理、特に生物学的脱リン処理から発生する余剰汚泥等
の中に持ち込まれるリンを良好に分離除去し得る脱リン
装置を提供することを目的とするものである。<Objective> The present invention improves the conventional problems as described above, and is capable of satisfactorily separating and removing phosphorus introduced into excess sludge and the like generated from activated sludge treatment, particularly biological dephosphorization treatment. The purpose is to provide a device.
＜構 成＞ 本発明は上記目的を達成すべく鋭意研究を重ねた結果な
されなものであり、その特徴とするところは、し尿等の
リンを含有するもの、あるいはその生物処理から発生す
るリン含有汚泥を嫌気性消化する嫌気性消化槽と、該槽
からの脱離液および／または汚泥をマグネシウムイオン
存在下に気曝処理してリン酸アンモニウムマグネシウム
の結晶あるいは微細沈殿物を生成する気曝槽を設けたこ
とにある。<Structure> The present invention has been made as a result of intensive studies to achieve the above object, and is characterized in that it contains phosphorus such as human excreta or phosphorus-containing substances generated by biological treatment thereof. Anaerobic digestion tank for anaerobically digesting sludge, and aeration tank for aerating the desorbed liquid and / or sludge in the presence of magnesium ions in the presence of magnesium ammonium phosphate crystals or fine precipitates Has been established.
以下に本発明を添付図面を参照して説明する。The present invention will be described below with reference to the accompanying drawings.
第１図は本発明装置の一例を示すものであり、図中の１
は嫌気性消化槽、２は気曝槽、３は沈降槽を示すもので
ある。このような装置において、嫌気性消化槽１に例え
ば活性汚泥処理から発生した余剰汚泥を投入し、嫌気性
消化を行う。この汚泥の嫌気性消化により生ずる消化汚
泥は消化槽１の底部から排出し、脱離液は気曝槽２へ送
られる。なお、脱離液と消化送泥との混合物を気曝槽２
へ送るようにしてもよく、あるいは消化槽１の底部から
排出される消化汚泥を別途設けた気曝槽（図示せず）へ
送り、脱離液と同じく起爆処理するようにしてもよい。
気曝槽２へ送られた脱離液および／または汚泥は槽底部
の空気噴出口より噴出する空気によりエアレーションさ
れ、脱炭酸される。これにより、液中のリンはリン酸ア
ンモニウムマグネシウムの結晶あるいは微細沈澱物とな
る。FIG. 1 shows an example of the device of the present invention.
Is an anaerobic digestion tank, 2 is an aeration exposure tank, and 3 is a sedimentation tank. In such a device, excess sludge generated from, for example, activated sludge treatment is put into the anaerobic digestion tank 1 to perform anaerobic digestion. The digested sludge generated by the anaerobic digestion of this sludge is discharged from the bottom of the digestion tank 1, and the desorbed liquid is sent to the aeration exposure tank 2. In addition, the mixture of the desorbed liquid and the digested sludge is exposed to the aeration tank 2
Alternatively, the digested sludge discharged from the bottom of the digestion tank 1 may be sent to a separately provided air exposure tank (not shown) and the same detonation treatment as that of the desorbed liquid may be performed.
The desorbed liquid and / or sludge sent to the aeration tank 2 is aerated by the air ejected from the air ejection port at the bottom of the tank and decarbonated. As a result, phosphorus in the liquid becomes crystals or fine precipitates of ammonium magnesium phosphate.
この他にも操作条件によつては、リン酸マグネシウム、
リン酸カルシウムの結晶となる場合もある。なお、マグ
ネシウム等の結晶が生成されるのは下水中に含まれるそ
れらのものを、リン同様汚泥中に取り込み、および溶出
するためであると推定される。In addition to this, depending on the operating conditions, magnesium phosphate,
It may be a crystal of calcium phosphate. It is presumed that the crystals of magnesium or the like are produced because those contained in the sewage are taken in and eluted in the sludge like phosphorus.
嫌気性消化脱離液に空気を、通気量と通気時間を変化さ
せて通気し、通気後60分間放置してPO4−Ｐを測定し
た。その結果を第２図に示す。この第２図からわかるよ
うに、通気により脱離液のPO4−Ｐは急激に低下し、通
気量が多いほどこの傾向は大きかつた。リン除去率は５
／分で12分間通気した場合、89％になつた。また、脱
離液に空気を通気しながら、pHとPO4−Ｐを測定し、180
分後に、この脱離液に炭酸ガスを通気し、通気中および
1,2日間密封放置後のpHとPO4−Ｐを測定した。その結果
を第３図に示す。第３図から明らかなように、空気の通
気とともに液のpHが上昇し、リンの除去が急激に行なわ
れたことを示している。なお、通気による効果確認のた
め、この後炭酸ガスを通気したところ、pHの低下とリン
の溶出が起り、これを２日間密封放置すると、pHは低い
ままでリンの再溶出が確認された。このような通気によ
り沈澱した成分を分析すると、組成比はMg:NH4−N:PO4
−Ｐ＝34.8:19.7:45.5で、この結晶はMgNH4PO4・6H2O
（リン酸アンモニウムマグネシウム）であると判断され
る。The anaerobic digestion / desorption solution was aerated with air by changing the aeration amount and the aeration time, and left for 60 minutes after the aeration to measure PO 4 -P. The results are shown in FIG. As can be seen from FIG. 2, the PO 4 -P in the desorbed liquid decreased sharply due to the ventilation, and the greater the ventilation amount, the greater this tendency. Phosphorus removal rate is 5
When aerated for 12 minutes / minute, it reached 89%. Also, while ventilating the desorbed liquid with air, the pH and PO 4 -P were measured, and 180
After a minute, carbon dioxide was bubbled through the desorbed liquid,
The pH and PO 4 -P were measured after left sealed for 1 or 2 days. The results are shown in FIG. As is clear from FIG. 3, the pH of the liquid increased with the aeration of air, indicating that phosphorus was rapidly removed. For confirming the effect of aeration, when carbon dioxide gas was aerated thereafter, pH was lowered and phosphorus was eluted, and when this was sealed and left for 2 days, redelution of phosphorus was confirmed while the pH remained low. When the components precipitated by such aeration were analyzed, the composition ratio was Mg: NH 4 --N: PO 4
-P = 34.8: 19.7: 45.5, the crystal MgNH 4 PO 4 · 6H 2 O
(Magnesium ammonium phosphate).
かくして、気曝槽２により嫌気性消化脱離液中のリン成
分がリン酸アンモニウムマグネシウムの結晶もしくは微
細沈澱物となる。この気曝槽２からの通気液はそのまま
で沈降槽３へ送られ、この沈降槽３により固液分離さ
れ、大部分のリンを除去した上澄液は活性汚泥処理工程
に返送され、リン酸塩の析出物を含む沈澱汚泥は濃縮、
脱水される。なお、この汚泥の一部を種晶として気曝槽
２へ返送するようにしてもよい。Thus, the phosphorus component in the anaerobic digestion and desorption solution becomes crystals or fine precipitates of magnesium ammonium phosphate by the aeration tank 2. The aeration liquid from the air exposure tank 2 is sent as it is to the sedimentation tank 3, and solid-liquid separation is carried out by the sedimentation tank 3, and the supernatant liquid from which most of the phosphorus has been removed is returned to the activated sludge treatment step to produce phosphoric acid. Settled sludge containing salt deposits is concentrated,
Be dehydrated. A part of this sludge may be returned to the aeration tank 2 as seed crystals.
第４図は気曝槽２の他の実施例を示すものであり、第４
図において、この気曝槽２は下端に沈澱物の取出し口４
を、上端にリン除去水の排出手段５を有しており、また
底部付近に空気噴出手段６をそしてその上方に嫌気性消
化槽１からの脱離液の供給口７を有するよう構成される
ものである。このような気爆槽２において、供給口７よ
り消化脱離液を槽内に供給し、次いで空気噴出手段６よ
り空気を脱離液中に通気すると、通気により脱炭酸さ
れ、液中のリンがリン酸アンモニウムマグネシウム結晶
として析出し、槽内を上向流として供給される液および
気泡により、この結晶が流動層として形成され、成長し
て大きくなつた結晶が下方へと沈降し、結晶の取出口４
から取出され、一方、リンが除去された水は槽上端に設
けられた排出手段５よりリン除去水として排出される。
このような気曝槽２において、析出するリン酸アンモニ
ウムマグネシウムの結晶を大きくして脱離液中の固形物
との分別、回収を容易にするため、この気曝槽２に種結
晶の投入手段を設けるようにしてもよい。FIG. 4 shows another embodiment of the air exposure tank 2,
In the figure, this air exposure tank 2 has a bottom end for taking out a sediment 4
Has a discharge means 5 for removing phosphorus-removed water at the upper end, an air jetting means 6 near the bottom, and a supply port 7 for desorbed liquid from the anaerobic digestion tank 1 above it. It is a thing. In such an air explosive tank 2, when the digestion desorption solution is supplied from the supply port 7 into the tank, and then air is blown into the desorption solution from the air jetting means 6, the carbon dioxide is decarbonated by the aeration and phosphorus in the solution is discharged. Precipitates as ammonium magnesium phosphate crystals, and due to the liquid and bubbles supplied as an upward flow in the tank, these crystals are formed as a fluidized bed, and the grown and enlarged crystals settle down, Exit 4
On the other hand, the water from which the phosphorus has been removed is discharged as phosphorus-removed water by the discharge means 5 provided at the upper end of the tank.
In such an air exposure tank 2, in order to increase the size of the precipitated crystals of magnesium ammonium phosphate to facilitate separation and recovery from the solid matter in the desorbed liquid, a means for introducing seed crystals into the air exposure tank 2 is used. May be provided.
以上のような第１図もしくは第４図の如き装置におい
て、通気による脱炭酸工程とともに消石灰、マグネシウ
ム塩（海水でもよい）等の添加を組合わせて通気量を節
約し、リン除去率を高めるようにしてもよい。In the apparatus as shown in FIG. 1 or FIG. 4 described above, the addition of slaked lime, magnesium salt (seawater may be used) or the like is combined with the decarboxylation step by aeration to save the aeration amount and increase the phosphorus removal rate. You may
以下に第１図に示される装置例を用いて第１表に示され
るような消化脱離液の脱リンを行なつた。すなわち、第
１表に示される脱離液100ｎに、気曝槽２において30.
0分で12分間通気した。これにより気曝槽２から排出
された通気液、および通気液を沈降槽３において２時間
および１日間沈降させた後の上澄液のSS量、リン含有量
等はそれぞれ第１表に示す如くであつた。Dephosphorization of the digestive desorption solution as shown in Table 1 was carried out below using the apparatus example shown in FIG. That is, in the air exposure tank 2, 30.
Aerated for 12 minutes at 0 minutes. As a result, the aeration liquid discharged from the aeration exposure tank 2 and the SS amount and phosphorus content of the supernatant after the aeration liquid was allowed to settle in the settling tank 3 for 2 hours and 1 day, respectively, are shown in Table 1. It was.
＜効 果＞ 以上のような本発明によれば、嫌気性消化槽と気曝槽と
を有し、活性汚泥処理から発生する余剰汚泥等のリンを
取り込んだ汚泥を嫌気性消化し、その脱離液および／ま
たは汚泥を気曝処理することにより、脱炭酸してpHを高
め、リン成分をリン酸アンモニウムマグネシウムとして
沈降分離でき、これによりリン成分が除去され、処理施
設内のリン循環を断ち切り、実質的なリンの除去が達成
される。 <Effect> According to the present invention as described above, it has an anaerobic digestion tank and an aeration exposure tank, and anaerobically digests sludge containing phosphorus such as excess sludge generated from activated sludge treatment, and removes the sludge. By subjecting the synergic liquid and / or sludge to air exposure, it can be decarboxylated to raise the pH and the phosphorus component can be precipitated and separated as ammonium magnesium phosphate, which removes the phosphorus component and interrupts the phosphorus circulation in the treatment facility. , Substantial phosphorus removal is achieved.
また汚泥中のリンの封鎖のために、汚泥脱水に消石灰、
塩化鉄等を用いる必要性もなくなり、高分子凝集剤によ
る脱水も可能になる。Also, to block phosphorus in sludge, slaked lime for sludge dehydration,
There is no need to use iron chloride or the like, and dehydration with a polymer coagulant is possible.
さらに、本発明によれば、従来炭酸塩を除くために汚泥
洗浄を行なつていたが、この工程が省略され、直接脱水
することができるとともに、生物処理に返送されていた
洗浄排水によるリンの循環も無くなるという効果をも有
する。Further, according to the present invention, sludge was conventionally washed to remove carbonates, but this step is omitted, and direct dehydration is possible, and phosphorus from the washing wastewater returned to biological treatment is removed. It also has the effect of eliminating circulation.
第１図は本発明装置の一例を模式的に示した概略説明図
である。 第２図は気曝槽における通気量、通気時間別にみた消化
槽脱離液中のリン酸態リン濃度の変化を示すもので、時
間とPO4−Ｐ量との関係図である。 第３図は気曝槽におけるエアレーションおよびCO2通気
による消化槽脱離液のpHとリン酸態リン濃度の変化を示
すもので、時間とPO4−Ｐ量との関係図である。 第４図は本発明に係る気曝槽の他の例を示す概略説明図
である。 １……嫌気性消化槽、２……気曝槽 ３……沈降槽、４……取出口 ５……排出手段、６……空気噴出手段 ７……供給口FIG. 1 is a schematic explanatory view schematically showing an example of the device of the present invention. FIG. 2 shows changes in the phosphate phosphorus concentration in the desorption liquid from the digestion tank, which is observed by the amount of aeration and the aeration time in the aeration tank, and is a relationship diagram between time and the amount of PO 4 -P. FIG. 3 shows the changes in the pH and phosphoric acid phosphorus concentration of the digestion tank desorption liquid by aeration and CO 2 aeration in the aeration tank, and is a relationship diagram between time and PO 4 -P amount. FIG. 4 is a schematic explanatory view showing another example of the air exposure tank according to the present invention. 1 ... Anaerobic digestion tank, 2 ... Air exposure tank 3 ... Sedimentation tank, 4 ... Outlet port 5 ... Ejection means, 6 ... Air ejection means 7 ... Supply port
───────────────────────────────────────────────────── フロントページの続き (72)発明者 堀口 忠雄 東京都新宿区西新宿３丁目４番７号 栗田 工業株式会社内 (56)参考文献 特開 昭53−67959（ＪＰ，Ａ) 実開 昭60−189399（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadao Horiguchi 3-4-7 Nishishinjuku, Shinjuku-ku, Tokyo Kurita Industry Co., Ltd. (56) Reference JP-A-53-67959 (JP, A) 60-189399 (JP, U)
Claims (5)
生するリン含有汚泥を嫌気性消化する嫌気性消化槽と、
該槽からの脱離液および／または汚泥をマグネシウムイ
オンの存在下に気曝処理してリン酸アンモニウムマグネ
シウムの結晶あるいは微細沈澱物を生成する気曝槽を設
けたことを特徴とする脱リン装置。1. An anaerobic digester that anaerobically digests phosphorus-containing water or phosphorus-containing sludge generated by biological treatment thereof.
A dephosphorization apparatus comprising an air exposure tank for subjecting the desorbed liquid and / or sludge from the tank to an air exposure treatment in the presence of magnesium ions to produce crystals of ammonium magnesium phosphate or a fine precipitate. .
する汚泥を消化処理するものである特許請求の範囲第１
項記載の装置。2. An anaerobic digester for digesting sludge generated from a biological dephosphorization apparatus.
The device according to the item.
に分離する沈降槽をさらに設けた特許請求の範囲第１項
記載の装置。3. The apparatus according to claim 1, further comprising a settling tank for separating the aeration liquid from the air exposure tank into a supernatant and a settling sludge.
出口と、その上端に設けられたリン除去水の排水手段
と、その底部付近に設けられた空気噴出手段と、この空
気噴出手段の上方に設けられた脱離液の供給口とを有す
るものである特許請求の範囲第１号記載の装置。4. An air exposure tank at the lower end of which an outlet for sediments, an upper end of which is provided a drainage means for phosphorus-removing water, an air ejection means provided near the bottom thereof, and this air. The device according to claim 1, which has a desorption liquid supply port provided above the ejection means.
いる特許請求の範囲第４項記載の装置。5. The apparatus according to claim 4, wherein the air exposure tank is provided with a seed crystal charging means.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61227863A JPH0777640B2 (en) | 1986-09-26 | 1986-09-26 | Dephosphorization device |
| JP10281565A JPH11151500A (en) | 1986-09-26 | 1998-10-02 | Dephosphorizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61227863A JPH0777640B2 (en) | 1986-09-26 | 1986-09-26 | Dephosphorization device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10281565A Division JPH11151500A (en) | 1986-09-26 | 1998-10-02 | Dephosphorizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6384696A JPS6384696A (en) | 1988-04-15 |
| JPH0777640B2 true JPH0777640B2 (en) | 1995-08-23 |
Family
ID=16867536
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61227863A Expired - Fee Related JPH0777640B2 (en) | 1986-09-26 | 1986-09-26 | Dephosphorization device |
| JP10281565A Pending JPH11151500A (en) | 1986-09-26 | 1998-10-02 | Dephosphorizer |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10281565A Pending JPH11151500A (en) | 1986-09-26 | 1998-10-02 | Dephosphorizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JPH0777640B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1110194A (en) * | 1997-06-23 | 1999-01-19 | Kurita Water Ind Ltd | Wastewater treatment device |
| JPH11300311A (en) * | 1998-04-23 | 1999-11-02 | Kubota Corp | Treatment of organic waste |
| JP2001047003A (en) * | 1999-08-11 | 2001-02-20 | Ebara Corp | Treatment of organic waste |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0712477B2 (en) * | 1987-02-16 | 1995-02-15 | ユニチカ株式会社 | How to remove phosphorus in water |
| JPH10118687A (en) * | 1996-10-22 | 1998-05-12 | Unitika Ltd | Treatment method of organic wastewater |
| JP3835930B2 (en) * | 1998-07-06 | 2006-10-18 | 株式会社クボタ | Organic waste treatment methods |
| TWI313187B (en) * | 2003-11-21 | 2009-08-11 | Ind Tech Res Inst | System for the treatment of organic containing waste water |
| US7402245B2 (en) * | 2005-01-21 | 2008-07-22 | Ebara Corporation | Digested sludge treatment apparatus |
| JP2007244994A (en) * | 2006-03-16 | 2007-09-27 | Unitika Ltd | Treatment method of digestion sludge and treatment equipment |
| JP2007244995A (en) * | 2006-03-16 | 2007-09-27 | Unitika Ltd | Treatment equipment of digestion sludge |
| JP4555813B2 (en) * | 2006-11-28 | 2010-10-06 | メタウォーター株式会社 | Hydrothermal gasification wastewater treatment method |
| JP4570608B2 (en) * | 2006-12-18 | 2010-10-27 | 荏原エンジニアリングサービス株式会社 | Organic wastewater treatment method and apparatus |
| JP6592406B2 (en) * | 2016-06-10 | 2019-10-16 | 水ｉｎｇ株式会社 | Crystallizer, methane fermentation facility, and scale prevention method in methane fermentation facility |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60189399U (en) * | 1984-05-24 | 1985-12-14 | 三菱重工業株式会社 | wastewater treatment equipment |
-
1986
- 1986-09-26 JP JP61227863A patent/JPH0777640B2/en not_active Expired - Fee Related
-
1998
- 1998-10-02 JP JP10281565A patent/JPH11151500A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1110194A (en) * | 1997-06-23 | 1999-01-19 | Kurita Water Ind Ltd | Wastewater treatment device |
| JPH11300311A (en) * | 1998-04-23 | 1999-11-02 | Kubota Corp | Treatment of organic waste |
| JP2001047003A (en) * | 1999-08-11 | 2001-02-20 | Ebara Corp | Treatment of organic waste |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6384696A (en) | 1988-04-15 |
| JPH11151500A (en) | 1999-06-08 |
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