JP3526081B2 - Organic wastewater treatment method and apparatus - Google Patents
Organic wastewater treatment method and apparatusInfo
- Publication number
- JP3526081B2 JP3526081B2 JP19631294A JP19631294A JP3526081B2 JP 3526081 B2 JP3526081 B2 JP 3526081B2 JP 19631294 A JP19631294 A JP 19631294A JP 19631294 A JP19631294 A JP 19631294A JP 3526081 B2 JP3526081 B2 JP 3526081B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- phosphorus
- solid
- tank
- liquid
- 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
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Landscapes
- Treatment Of Sludge (AREA)
- Removal Of Specific Substances (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、し尿系汚水、工場廃
水、下水などのリンを含む有機性汚水を生物学的脱リン
処理する新しい処理方法を提供するものである。詳しく
は、有機性汚水中のリンを資源回収でき、かつ生物処理
にともなって発生する余剰活性汚泥量を著しく減少する
ことが可能な新規方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a new treatment method for biologically dephosphorizing organic sewage containing phosphorus such as night soil sewage, industrial wastewater and sewage. More specifically, the present invention relates to a novel method and apparatus capable of recovering phosphorus in organic wastewater as a resource and significantly reducing the amount of excess activated sludge generated during biological treatment.
【０００２】[0002]
【従来の技術】下水などの有機性汚水中の汚染物質の１
つとしてリンがある。該汚水中のリンを除去する技術と
して種々研究開発されている。中でも、下水などの有機
性汚水を脱リン処理する有効な方法の一つとして生物処
理法がある。従来から、嫌気好気活性汚泥法による生物
学的な脱リン方法が知られている。しかし、この方法は
汚水中のリンを除去できるものの、回収したリンを効率
的に廃棄処理することができなかった。更に、最近の資
源のリサイクルという観点においては、有機汚水中のリ
ンを資源として有効に回収することが必要となってきて
いる。また、上記処理法では、生物処理に付随して発生
する余剰汚泥量が多量であり、汚泥処理に大きな負担を
与えていた。2. Description of the Related Art One of pollutants in organic wastewater such as sewage
There is phosphorus as one. Various research and development have been carried out as a technique for removing phosphorus in the wastewater. Among them, there is a biological treatment method as one of the effective methods for dephosphorizing organic wastewater such as sewage. Conventionally, a biological dephosphorization method by an anaerobic aerobic activated sludge method has been known. However, although this method can remove phosphorus in wastewater, the recovered phosphorus could not be efficiently disposed of. Furthermore, from the viewpoint of recent resource recycling, it has become necessary to effectively recover phosphorus in organic wastewater as a resource. Further, in the above treatment method, the amount of surplus sludge generated in association with biological treatment is large, which imposes a heavy burden on sludge treatment.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記従来技
術の有する課題を解決するものであり、活性汚泥法によ
る生物脱リン法に新たな技術思想を加え、有機性汚水か
らリンを除去するとともに、資源として回収できるよう
にし、さらに余剰汚泥の発生量を大きく減少できる方法
及び装置を確立することを目的としている。DISCLOSURE OF THE INVENTION The present invention is to solve the problems of the above-mentioned prior art, and removes phosphorus from organic wastewater by adding a new technical idea to the biological dephosphorization method by the activated sludge method. At the same time, it is possible to collect it as a resource and further reduce the amount of excess sludge generated.
And to establish the equipment .
【０００４】[0004]
【課題を解決するための手段】生物学的脱リン工程の好
気工程以後に存在する活性汚泥にはリンが高濃度に含ま
れている。本発明はこの点に着目し、該汚泥にＮａＯＨ
ＫＯＨ等のアルカリを添加してリンを吐き出させ、リン
をリン酸カルシウムなどの資源として回収し、更に活性
汚泥をアルカリ条件で可溶化して活性汚泥量を減らすと
いう新概念を解決手段としている。即ち、本発明は、有
機性汚水を生物学的に脱リンする工程の好気工程以後の
部分の活性汚泥を取り出し、該汚泥に水酸化ナトリウム
又は水酸化カリウムを添加し、汚泥ｐＨを１０以上に上
昇させて汚泥からリンを吐き出させるとともに可溶化
し、しかるのち固液分離し、分離汚泥を前記の生物脱リ
ン工程に返送するとともに、分離液にリン酸イオンを不
溶化するカルシウム又はマグネシウム系化合物を添加し
てリンを析出させて除去した後、該分離液を前記生物脱
リン工程に供給することを特徴とする有機性汚水の処理
方法である。また、有機性汚水を生物学的に脱リンする
装置の好気処理槽以後の部分の活性汚泥を取り出し、該
汚泥に水酸化ナトリウム又は水酸化カリウムを添加し、
汚泥ｐＨを１０以上に上昇させて汚泥からリンを吐き出
させるとともに可溶化するアルカリ加温槽、該アルカリ
加温槽の処理物を固液分離する固液分離部、該固液分離
部からの分離汚泥を前記の生物脱リン装置に返送する導
管、該固液分離部からの分離液にリン酸イオンを不溶化
するカルシウム又はマグネシウム系化合物を添加してリ
ンを析出除去するリン不溶化槽、及び該リン不溶化槽か
らの分離液を前記生物脱リン装置に供給する導管を有す
ることを特徴とする有機性汚水の処理装置である。The activated sludge existing after the aerobic step of the biological dephosphorization step contains a high concentration of phosphorus. The present invention pays attention to this point and applies NaOH to the sludge.
A new concept is to reduce the amount of activated sludge by adding alkali such as KOH to expel phosphorus, recovering phosphorus as a resource such as calcium phosphate, and solubilizing activated sludge under alkaline conditions to reduce the amount of activated sludge. That is, the present invention takes out the activated sludge of the part after the aerobic step of the step of biologically dephosphorizing the organic sewage, and removes the sodium hydroxide
Or add potassium hydroxide to raise sludge pH to 10 or above
Raise and solubilize phosphorus from the sludge and solubilize it, and then perform solid-liquid separation, and return the separated sludge to the biological dephosphorization step, and a calcium or magnesium compound that insolubilizes phosphate ions in the separated liquid. A method for treating organic sewage, comprising adding and precipitating and removing phosphorus and then supplying the separated liquid to the biological dephosphorization step. Further, the activated sludge of the portion after the aerobic treatment tank of the device for biologically dephosphorizing organic wastewater is taken out, and sodium hydroxide or potassium hydroxide is added to the sludge,
Alkali heating tank that raises sludge pH to 10 or more to discharge phosphorus from the sludge and solubilizes it, solid-liquid separation section for solid-liquid separation of treated material in the alkaline heating tank, and separation from the solid-liquid separation section A conduit for returning sludge to the biological dephosphorization device, a phosphorus insolubilization tank for adding and removing a calcium or magnesium compound that insolubilizes phosphate ions into the separated liquid from the solid-liquid separation unit, and the phosphorus. The organic sewage treatment apparatus is characterized by having a conduit for supplying the separated liquid from the insolubilization tank to the biological dephosphorization apparatus.
【０００５】以上の方法によって、次の本発明に独自の
作用が生ずる。本発明により、先ず有機性汚水を生物学
的脱リン工程を用いて脱リンすることで、有機性汚水中
のリンがまず活性汚泥に取り込まれ（生物的脱リン処
理）、その後水酸化ナトリウム又は水酸化カリウムの添
加によるアルカリ処理によってリンが活性汚泥から溶出
し、更にカルシウム又はマグネシウム系化合物の添加に
より液中のリンを不溶化することによりリンを回収する
ことができる。これにより、有機性汚水中のリンを除去
でき、且つその除去したリンを資源として回収すること
ができる。更に、活性汚泥がアルカリ処理によって加水
分解され、大部分が可溶化しＢＯＤ成分に変わる。ここ
で、好ましくは加温下でアルカリ処理を行えば可溶化効
果が高まる。これを生物学的処理施設に供給して該ＢＯ
Ｄを除去するので余剰汚泥発生量を著しく減少させるこ
とができる。余剰汚泥発生量を減少させることで、汚泥
処理の合理化が達成される。By the above method, the following unique effects are brought about in the present invention. According to the present invention, by first dephosphorizing organic wastewater using a biological dephosphorization step, phosphorus in the organic wastewater is first incorporated into activated sludge (biological dephosphorization treatment), and then sodium hydroxide or Addition of potassium hydroxide
Phosphorus is eluted from the activated sludge by alkaline treatment with addition, and calcium or magnesium compounds can be added.
It can be recovered phosphorus by insolubilizing the phosphorus more submerged. Thereby, phosphorus in the organic wastewater can be removed, and the removed phosphorus can be recovered as a resource. Furthermore, the activated sludge is hydrolyzed by the alkali treatment, and most of it is solubilized and converted into BOD components. Here, the solubilization effect is enhanced by preferably performing the alkali treatment under heating. This is supplied to the biological treatment facility and the BO
Since D is removed, the amount of excess sludge generated can be significantly reduced. By reducing the amount of excess sludge generated, rationalization of sludge treatment is achieved.
【０００６】また、該活性汚泥から可溶化したＢＯＤ成
分が、生物学的脱リン工程に供給されるので、ＢＯＤ／
Ｐ比が大きくなり、リン除去率が向上し処理水のリン濃
度を更に低くできる。該可溶化したＢＯＤ成分は、生物
学的脱リン工程が嫌気部と好気部で構成される場合、そ
の嫌気部に供給することが好ましい。これにより嫌気部
における汚泥からのリンの吐き出しが促進され、この結
果、生物学的脱リン施設の好気部ではリンの活性汚泥へ
の取り込みも促進される。Further, since the BOD component solubilized from the activated sludge is supplied to the biological dephosphorization step, BOD /
The P ratio is increased, the phosphorus removal rate is improved, and the phosphorus concentration of the treated water can be further reduced. When the biological dephosphorization step is composed of an anaerobic part and an aerobic part, the solubilized BOD component is preferably supplied to the anaerobic part. This promotes the discharge of phosphorus from the sludge in the anaerobic section, and as a result, the uptake of phosphorus into the activated sludge in the aerobic section of the biological dephosphorization facility.
【０００７】以下に、図１を参照しながら本発明を詳し
く説明する。本発明の方法の一態様を示した図１に示す
ように、ここでは、生物学的脱リン施設としての処理槽
１と、沈澱槽２とリン回収手段３とからなる方法につい
て説明する。ここでは、生物学的脱リン施設としての処
理槽１として、前半の嫌気部４と、後半の好気部５とか
らなる処理槽を用いる場合について説明する。有機性汚
水６は、処理槽１の嫌気部４に導入され、更に同槽１の
好気部５に移動し処理される。好気部５には散気管７が
設置されブロワ８から空気が送り込まれる。好気部５か
ら流出する処理水は、沈澱槽２に送液される。該処理水
中の活性汚泥は沈殿槽２において沈殿汚泥９として沈降
分離され、それ以外の清澄な処理水２２は放水すること
ができる。沈殿汚泥９の一部は余剰汚泥１０として系外
に排出される。排出される余剰汚泥１０以外の沈殿汚泥
９の処理汚泥１１は、リン回収手段３に入る。該処理汚
泥１１の大部分は返送汚泥１２として前記嫌気部２に循
環され、その他のリン回収用汚泥１３はカセイソーダ等
のアルカリ１４の添加を受けてアルカリ加温槽１５に流
入する。ここで、返送汚泥は原水流入量１ｍ3 当たり
０．８〜１．２ｍ3 、余剰汚泥は乾燥固形物（ＤＳ）と
して５０ｇ程度、容積として５リットル程度とした。ア
ルカリ１４としては、水酸化ナトリウム、水酸化カリウ
ム等が挙げられる。このアルカリ１４の加温槽１５への
添加量は、ｐＨが１０以上になるように添加する。The present invention will be described in detail below with reference to FIG. As shown in FIG. 1 showing one embodiment of the method of the present invention, a method comprising a treatment tank 1 as a biological dephosphorization facility, a precipitation tank 2 and a phosphorus recovery means 3 will be described here. Here, a case will be described in which a treatment tank including an anaerobic section 4 in the first half and an aerobic section 5 in the second half is used as the treatment tank 1 as a biological dephosphorization facility. The organic sewage 6 is introduced into the anaerobic section 4 of the treatment tank 1 and further moved to the aerobic section 5 of the same tank 1 for treatment. An air diffuser 7 is installed in the aerobic part 5, and air is sent from a blower 8. The treated water flowing out from the aerobic part 5 is sent to the settling tank 2. The activated sludge in the treated water is settled and separated as the settled sludge 9 in the settling tank 2, and the other clear treated water 22 can be discharged. A part of the settled sludge 9 is discharged outside the system as a surplus sludge 10. The treated sludge 11 of the settled sludge 9 other than the discharged excess sludge 10 enters the phosphorus recovery means 3. Most of the treated sludge 11 is circulated to the anaerobic section 2 as return sludge 12, and the other phosphorus recovery sludge 13 is added with an alkali 14 such as caustic soda and flows into an alkali heating tank 15. Here, return sludge is raw water inflow 1 m 3 per 0.8～1.2M 3, excess sludge is 50g about as dry solids (DS), and approximately 5 liters as volume. Examples of the alkali 14 include sodium hydroxide and potassium hydroxide. The amount of the alkali 14 added to the heating tank 15 is such that the pH becomes 10 or more.
【０００８】この槽１５では該汚泥１３に含まれるリン
がアルカリ性条件下で液側に溶出する。更に、該槽１５
では汚泥１３が加水分解を受けて可溶化する。アルカリ
加温槽１５のｐＨとしては１０〜１２、温度としては７
０〜９０℃が好ましい。該槽１５の滞留時間は１２〜２
４時間で良い。アルカリ加温槽１５に供給するリン回収
用汚泥１３の流量ｑは、原水である有機汚水６（流量
Ｑ）中のリン濃度をＣとし、該汚泥１３に含まれるリン
含有率をａとすると、概略
ｑ≒ＱＣ／ａ
に設定すればよい。アルカリ加温槽１５からの流出液
は、遠心分離機などの固液分離部１６に於いて分離液１
７と分離汚泥２１に分離される。分離液１７は、リン不
溶化槽１８に送られカルシウムまたはマグネシウム等を
有するリン酸イオンを不溶化する薬品が添加され、リン
酸カルシウムまたはリン酸マグネシウムアンモニウム等
のリン含有沈殿を析出させる。この沈殿を固液分離部１
９において分離し、リン資源２０として回収する。ここ
でリン酸イオンを不溶化する薬品としては、ＣａＣ
ｌ2、ＣａＯ、Ｃａ（ＯＨ）2 、ＭｇＣｌ2 、ＭｇＳＯ
4 、ＭｇＯ、Ｍｇ（ＯＨ）2等が挙げられる。In this tank 15, the phosphorus contained in the sludge 13 is eluted to the liquid side under alkaline conditions. Further, the tank 15
Then, the sludge 13 is hydrolyzed and solubilized. The pH of the alkaline heating tank 15 is 10 to 12, and the temperature is 7
0-90 degreeC is preferable. Residence time of the tank 15 is 12 to 2
4 hours is enough. As for the flow rate q of the phosphorus recovery sludge 13 supplied to the alkali heating tank 15, when the phosphorus concentration in the organic wastewater 6 (flow rate Q) that is raw water is C and the phosphorus content rate in the sludge 13 is a, It is sufficient to set approximately q≈QC / a. The effluent from the alkaline heating tank 15 is separated into the separated liquid 1 in the solid-liquid separation unit 16 such as a centrifuge.
7 and separated sludge 21. The separated liquid 17 is sent to a phosphorus insolubilization tank 18 and a chemical that insolubilizes phosphate ions having calcium or magnesium is added thereto to precipitate a phosphorus-containing precipitate such as calcium phosphate or magnesium ammonium phosphate. This precipitate is separated into solid-liquid separation unit 1
Separation at 9 and recovery as phosphorus resource 20. Here, as a chemical for insolubilizing phosphate ions, CaC
l 2 , CaO, Ca (OH) 2 , MgCl 2 , MgSO
4 , MgO, Mg (OH) 2 and the like.
【０００９】リン不溶化槽１８の滞留時間は１時間で充
分である。リン不溶化槽１８に添加するカルシウム、マ
グネシウム等を有するリン酸イオンを不溶化する薬品の
量は固液分離液１７のなかのリン濃度に対し当量〜１．
５倍当量が好ましい。分離汚泥２１と固液分離部１９の
分離液には、ＢＯＤ成分が多量に含まれているので、生
物脱リン工程である処理槽１に供給し、返送汚泥１２か
らのリンの吐き出しを促進させることに利用することが
できる。アルカリ加温槽１５から流出するスラリの沈降
性は良くないので固液分離部１６は沈殿槽ではなく遠心
分離機が好ましい。なお、固液分離部１９はリン酸カル
シウム、リン酸マグネシウムアンモニウム等の回収され
たリン資源２０が、沈降性が良いので沈殿槽で充分であ
る。A residence time of 1 hour in the phosphorus insolubilizing tank 18 is sufficient. The amount of the chemical added to the phosphorus insolubilization tank 18 for insolubilizing phosphate ions having calcium, magnesium, etc. is equivalent to the phosphorus concentration in the solid-liquid separation liquid 17 to 1.
Five times equivalents are preferred. The separation liquid of the separation sludge 21 and the solid-liquid separation unit 19 contains a large amount of BOD component, so that it is supplied to the treatment tank 1 which is a biological dephosphorization process to promote discharge of phosphorus from the returned sludge 12. It can be used for anything. Since the settling property of the slurry flowing out from the alkali heating tank 15 is not good, the solid-liquid separation section 16 is preferably a centrifugal separator instead of a precipitation tank. Note that the solid-liquid separation unit 19 is sufficient as a precipitation tank because the recovered phosphorus resources 20, such as calcium phosphate and magnesium ammonium phosphate, have good sedimentation properties.
【００１０】[0010]
【実施例】以下、実施例を示して本発明を具体的に説明
するが、本発明がこれらに限定されるものではない。
実施例１
図１の装置により実験を行った。下水（ＢＯＤ１５０ｍ
ｇ／リットル、ＳＳ１２０ｍｇ／リットル、リン濃度
３．８ｍｇ／リットル）を対象として本発明の実証試験
を行なった。下記表−１に実験条件を示した。ここで、
返送汚泥は原水流入量１ｍ3 当り０．８〜１．２ｍ3 、
余剰汚泥は乾燥固形物（ＤＳ）として５０ｇ、容積とし
て５リットル程度とした。この条件で実験を行なったと
ころ、下水中のリンが肥料として利用可能なヒドロキシ
アパタイトとして下水１ｍ3 当たり約４３ｇで回収され
た。また、余剰汚泥発生量は下水１ｍ3 当たり５０ｇで
あった。処理水水質はＢＯＤ８ｍｇ／リットル、ＳＳ１
２ｍｇ／リットル、リン濃度０．６ｍｇ／リットルと良
好であった。EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited thereto. Example 1 An experiment was conducted using the apparatus shown in FIG. Sewage (BOD 150m
g / liter, SS 120 mg / liter, phosphorus concentration 3.8 mg / liter), the demonstration test of the present invention was conducted. The experimental conditions are shown in Table 1 below. here,
Return sludge is raw water inflow 1m 3 per 0.8~1.2m 3,
The excess sludge was 50 g as dry solid matter (DS) and about 5 liters in volume. When experiments were conducted under these conditions, phosphorus in sewage was recovered as hydroxyapatite usable as a fertilizer at about 43 g per 1 m 3 of sewage. The amount of surplus sludge generated was 50 g per 1 m 3 of sewage. Treated water quality is BOD 8mg / liter, SS1
2 mg / liter and a phosphorus concentration of 0.6 mg / liter were good.
【００１１】[0011]
【表１】 [Table 1]
【００１２】比較例
図１の本発明のリン回収手段を除去し比較実験を行なっ
た。実験条件は、前記表−１のｆ〜ｋを除去したａ〜ｅ
の条件に従った。処理水水質はＢＯＤ７ｍｇ／リット
ル、ＳＳ９ｍｇ／リットル、リン濃度０．９ｍｇ／リッ
トルであり、リン除去率が本発明よりも劣った。リンは
汚泥中に取り込まれた状態で排出されるためリン資源と
して利用できなかった。余剰汚泥発生量は下水１ｍ3 当
たり１２８ｇであり、本発明より著しく多量であった。Comparative Example A comparative experiment was conducted by removing the phosphorus recovery means of the present invention shown in FIG. The experimental conditions are a to e obtained by removing f to k in Table 1 above.
According to the conditions of. The treated water quality was BOD 7 mg / liter, SS 9 mg / liter, and phosphorus concentration 0.9 mg / liter, and the phosphorus removal rate was inferior to that of the present invention. Phosphorus cannot be used as a phosphorus resource because it is discharged as it is taken into sludge. The amount of excess sludge generated was 128 g per 1 m 3 of sewage, which was significantly larger than that of the present invention.
【００１３】[0013]
【発明の効果】本発明において、分離した活性汚泥から
リンを不溶化して回収することにより、有機汚水中のリ
ンを除去できるとともに資源として回収できる。更に、
活性汚泥を可溶化するので、余剰汚泥発生量が減少し、
汚泥処理が著しく合理化される。その上、活性汚泥をア
ルカリで加水分解し、ＢＯＤ成分として生物処理槽に供
給することによって、有機性汚水のＢＯＤ／Ｐ比を高く
できるので生物脱リン効果が安定し、除去率も向上す
る。INDUSTRIAL APPLICABILITY In the present invention, by insolubilizing and recovering phosphorus from the separated activated sludge, phosphorus in the organic wastewater can be removed and recovered as a resource. Furthermore,
Since activated sludge is solubilized, the amount of excess sludge generated is reduced,
Sludge treatment is significantly streamlined. Furthermore, the activated sludge is hydrolyzed with an alkali, by supplying to the organism treatment tank as BOD components, it is possible to increase the BOD / P ratio of the organic wastewater biological dephosphorization effect is stable, also improved removal rate .
【図１】 本発明の方法の一態様を示す工程図である。FIG. 1 is a process drawing showing one embodiment of the method of the present invention.
１ 処理槽 ２ 沈澱槽 ３ リン回収手段 ４ 嫌気部 ５ 好気部 ６ 有機性汚水 ７ 散気管 ８ ブロア ９ 沈澱汚泥 １０ 余剰汚泥 １１ 処理汚泥 １２ 返送汚泥 １３ リン回収汚泥 １４ アルカリ １５ アルカリ加温槽 １６ 固液分離部 １７ 分離液 １８ リン不溶化槽 １９ 固液分離部 ２０ リン資源 ２１ 分離汚泥 ２２ 処理水 1 processing tank 2 settling tank 3 phosphorus recovery means 4 Anaerobic part 5 aerobic club 6 organic wastewater 7 Air diffuser 8 blowers 9 Settled sludge 10 excess sludge 11 Treated sludge 12 Return sludge 13 Phosphorus recovery sludge 14 alkali 15 Alkali heating tank 16 Solid-liquid separation unit 17 Separation liquid 18 Phosphorus insolubilization tank 19 Solid-liquid separation section 20 Phosphorus resources 21 Separation sludge 22 Treated water
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−87496（ＪＰ，Ａ) 特開 昭59−123597（ＪＰ，Ａ) 特開 平７−116685（ＪＰ，Ａ) 特開 昭63−175687（ＪＰ，Ａ) 特公 昭57−19719（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/28 - 3/34 C02F 3/12 C02F 11/00 - 11/20 ─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-56-87496 (JP, A) JP-A-59-123597 (JP, A) JP-A-7-116685 (JP, A) JP-A-63- 175687 (JP, A) JP-B-57-19719 (JP, B1) (58) Fields surveyed (Int.Cl. 7 , DB name) C02F 3/28-3/34 C02F 3/12 C02F 11/00- 11/20
Claims (2)
の好気工程以後の部分の活性汚泥を取り出し、該汚泥に
水酸化ナトリウム又は水酸化カリウムを添加し、汚泥ｐ
Ｈを１０以上に上昇させて汚泥からリンを吐き出させる
とともに可溶化し、しかるのち固液分離し、分離汚泥を
前記の生物脱リン工程に返送するとともに、分離液にリ
ン酸イオンを不溶化するカルシウム又はマグネシウム系
化合物を添加してリンを析出させて除去した後、該分離
液を前記生物脱リン工程に供給することを特徴とする有
機性汚水の処理方法。1. The activated sludge of the part after the aerobic step of the step of biologically dephosphorizing the organic sewage is taken out,
Add sodium hydroxide or potassium hydroxide and add sludge p
Calcium that raises H to 10 or more to solubilize and discharge phosphorus from sludge, and then solid-liquid separates, and returns the separated sludge to the biological dephosphorization step, and insolubilizes phosphate ions in the separated liquid. Or magnesium
A method for treating organic wastewater, comprising adding a compound to precipitate and remove phosphorus, and then supplying the separated liquid to the biological dephosphorization step.
の好気処理槽以後の部分の活性汚泥を取り出し、該汚泥
に水酸化ナトリウム又は水酸化カリウムを添加し、汚泥
ｐＨを１０以上に上昇させて汚泥からリンを吐き出させ
るとともに可溶化するアルカリ加温槽、該アルカリ加温
槽の処理物を固液分離する固液分離部、該固液分離部か
らの分離汚泥を前記の生物脱リン装置に返送する導管、
該固液分離部からの分離液にリン酸イオンを不溶化する
カルシウム又はマグネシウム系化合物を添加してリンを
析出除去するリン不溶化槽、及び該リン不溶化槽からの
分離液を前記生物脱リン装置に供給する導管を有するこ
とを特徴とする有機性汚水の処理装置。2. The activated sludge in the portion after the aerobic treatment tank of the device for biologically dephosphorizing organic wastewater is taken out, and sodium hydroxide or potassium hydroxide is added to the sludge to obtain sludge.
Alkali heating tank that raises pH to 10 or more to discharge phosphorus from the sludge and solubilizes it, solid-liquid separation unit that performs solid-liquid separation of a treated product of the alkaline heating tank, and sludge separated from the solid-liquid separation unit A conduit for returning to the biological dephosphorization device,
Phosphate ions are insolubilized in the separated liquid from the solid-liquid separation section.
Add calcium or magnesium compounds to add phosphorus
An apparatus for treating organic wastewater, comprising: a phosphorus insolubilization tank for depositing and removing ; and a conduit for supplying a separated liquid from the phosphorus insolubilization tank to the biological dephosphorization apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19631294A JP3526081B2 (en) | 1994-07-29 | 1994-07-29 | Organic wastewater treatment method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19631294A JP3526081B2 (en) | 1994-07-29 | 1994-07-29 | Organic wastewater treatment method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0839096A JPH0839096A (en) | 1996-02-13 |
| JP3526081B2 true JP3526081B2 (en) | 2004-05-10 |
Family
ID=16355721
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19631294A Expired - Fee Related JP3526081B2 (en) | 1994-07-29 | 1994-07-29 | Organic wastewater treatment method and apparatus |
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| Country | Link |
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| JP (1) | JP3526081B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4124902B2 (en) * | 1999-03-15 | 2008-07-23 | 前澤工業株式会社 | Wastewater treatment equipment |
| JP4505878B2 (en) * | 1999-05-26 | 2010-07-21 | 栗田工業株式会社 | Treatment method of organic sludge |
| JP3724990B2 (en) * | 1999-08-11 | 2005-12-07 | 株式会社荏原製作所 | Organic waste treatment method and equipment |
| JP4714350B2 (en) * | 2001-02-09 | 2011-06-29 | 株式会社神鋼環境ソリューション | Organic wastewater treatment method |
| US8002986B2 (en) | 2001-03-02 | 2011-08-23 | Daniel R. Miklos | Apparatus and methods for control of waste treatment processes |
| US7850850B2 (en) | 2001-03-02 | 2010-12-14 | Daniel Robert Miklos | Apparatus and methods for control of waste treatment processes |
| US7429328B2 (en) | 2001-03-02 | 2008-09-30 | Advanced Treatment Sciences, Inc. | Apparatus and methods for control of waste treatment processes |
| US7854842B2 (en) | 2001-03-02 | 2010-12-21 | Daniel Robert Miklos | Apparatus and methods for control of waste treatment processes |
| JP2002361278A (en) * | 2001-06-12 | 2002-12-17 | Hitachi Kiden Kogyo Ltd | Method for removing phosphorus in sludge |
| JP2003211178A (en) * | 2002-01-25 | 2003-07-29 | Hitachi Kiden Kogyo Ltd | Sludge treatment method |
| AU2003257701A1 (en) * | 2002-09-02 | 2004-04-08 | Takeshi Koga | Method of reducing volume of sludge and apparatus therefor |
| US7070747B2 (en) | 2003-06-02 | 2006-07-04 | Mitsubishi Denki Kabushiki Kaisha | Process of eluting and recovering phosphorus from sludge |
| JP4266329B2 (en) * | 2003-06-20 | 2009-05-20 | 三菱電機株式会社 | Organic waste liquid processing method and processing apparatus |
| KR100673832B1 (en) * | 2006-01-27 | 2007-01-25 | (주)전테크 | Removal reactor of ammonia , phosphorous and solid in wastewater |
| JP5981096B2 (en) * | 2010-06-02 | 2016-08-31 | 日立造船株式会社 | Wastewater treatment method and apparatus |
| JP6649091B2 (en) * | 2016-01-12 | 2020-02-19 | 日立造船株式会社 | Phosphorus recovery method and phosphorus recovery equipment |
| CN108178470B (en) * | 2018-01-10 | 2020-04-21 | 河海大学 | Method for one-step recovery of phosphorus from algae mud by supercritical water gasification |
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1994
- 1994-07-29 JP JP19631294A patent/JP3526081B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0839096A (en) | 1996-02-13 |
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