JP3516309B2 - Method and apparatus for treating phosphorus-containing organic wastewater - Google Patents
Method and apparatus for treating phosphorus-containing organic wastewaterInfo
- Publication number
- JP3516309B2 JP3516309B2 JP18901094A JP18901094A JP3516309B2 JP 3516309 B2 JP3516309 B2 JP 3516309B2 JP 18901094 A JP18901094 A JP 18901094A JP 18901094 A JP18901094 A JP 18901094A JP 3516309 B2 JP3516309 B2 JP 3516309B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphorus
- sludge
- tank
- biological treatment
- organic wastewater
- 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
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、し尿系汚水、工場廃
水、下水などのリン含有有機性汚水を生物処理する場合
の新しい処理方法を提供するものである。特に、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 biological treatment of phosphorus-containing organic wastewater such as human waste sewage, industrial wastewater and sewage. In particular, a new method capable of recovering phosphorus in wastewater and remarkably reducing the amount of excess sludge generated by biological treatment
And equipment .
【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、有機性汚水を脱
リン処理する有効な方法の１つとして、活性汚泥法の曝
気槽等の生物処理工程に無機凝集剤を添加してリンを除
去する「凝集剤添加活性汚泥法」が知られている。しか
し、この方法は有機汚水中のリンを除去できるものの、
回収したリン及びその無機凝集剤を効率的に処理するこ
とができなかった。更に、最近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、リンを凝
集させた凝集汚泥の発生量が多量であるため、汚泥処理
に大きな負担を与えていた。更に、生物処理工程で発生
する余剰活性汚泥の発生量も多量であり、その処理処分
に苦慮しているのが実情である。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, one of the effective methods for dephosphorizing organic wastewater is the "flocculant-added activated sludge method" which removes phosphorus by adding an inorganic flocculant to a biological treatment process such as an aeration tank of the activated sludge method. Are known. However, although this method can remove phosphorus in organic wastewater,
The recovered phosphorus and its inorganic coagulant could not be treated efficiently. Furthermore, from the viewpoint of resource recycling recently, it has become necessary to effectively recover phosphorus in organic wastewater as a resource. In addition, since a large amount of aggregated sludge in which phosphorus is aggregated is generated, a great burden is placed on sludge treatment. Furthermore, the amount of surplus activated sludge generated in the biological treatment process is also large, and the actual situation is that the treatment and disposal of the sludge is difficult.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、「凝集剤添
加活性汚泥法」に新規着想を加えたものであり、本発明
の目的は、上記従来技術の課題を解決することであり、
有機性汚水からリンを除去し、且つ資源として回収でき
るようにし、凝集汚泥及び余剰汚泥の発生量を大きく減
少でき、更に無機凝集剤の使用量を削減できるリン含有
有機性汚水の処理方法及び装置を確立することである。The present invention is a new idea added to the "coagulant-added activated sludge method", and an object of the present invention is to solve the above-mentioned problems of the prior art.
Phosphorus-containing organic wastewater treatment method and apparatus capable of removing phosphorus from organic wastewater and recovering it as a resource, capable of greatly reducing the amounts of coagulated sludge and excess sludge, and further reducing the amount of inorganic coagulant used Is to establish.
【０００４】[0004]
【課題を解決するための手段】上記目的は、リンを含む
有機性汚水を生物処理する工程に、鉄系凝集剤または水
酸化鉄を添加してリンを不溶化させ、該リン不溶化物を
活性汚泥と共に沈殿させたのち、該沈殿汚泥にアルカリ
剤を添加して汚泥からリンを溶出させ且つ該活性汚泥を
可溶化し、その後固液分離し、該分離汚泥は前記の生物
処理工程に供給し、分離液はリン酸イオンを不溶化する
薬品を添加してリンを回収した後、前記生物処理工程に
供給することを特徴とするリン含有有機性汚水の処理方
法により達成することが見い出された。また、上記目的
は、リンを含む有機性汚水を供給し、鉄系凝集剤または
水酸化鉄を添加してリンを不溶化させる生物処理装置、
前記生物処理装置の該リン不溶化物を活性汚泥と共に沈
殿させる沈殿槽、該沈殿槽からの沈殿汚泥にアルカリ剤
を添加して汚泥からリンを溶出させ且つ該活性汚泥を可
溶化するリン溶出槽、前記リン溶出槽からの処理物を固
液分離する固液分離部、前記固液分離部での分離汚泥を
前記の生物処理装置に供給し、分離液を供給しそれにリ
ン酸イオンを不溶化する薬品を添加してリンを回収する
リン不溶化槽、及び前記リン不溶化槽からの分離液を前
記生物処理装置に供給する循環管路を設けたことを特徴
とするリン含有有機性汚水の処理装置により達成するこ
とが見い出された。 Means for Solving the Problems The above-mentioned object is to add an iron-based coagulant or iron hydroxide to insolubilize phosphorus in the step of biologically treating organic wastewater containing phosphorus, and to convert the phosphorus-insoluble matter into activated sludge. After precipitation with, after adding an alkaline agent to the precipitated sludge to dissolve phosphorus from the sludge and solubilize the activated sludge, and then solid-liquid separation, the separated sludge is supplied to the biological treatment step, It has been found that the separated liquid is achieved by a method for treating phosphorus-containing organic wastewater, which comprises feeding a chemical that insolubilizes phosphate ions to recover phosphorus, and then supplying the phosphorus to the biological treatment step. Also, the above purpose
Supplies organic wastewater containing phosphorus, and ferrous flocculant or
Biological treatment equipment to add iron hydroxide to insolubilize phosphorus,
The phosphorus insolubilization product of the biological treatment equipment is precipitated with activated sludge.
Alkaline agent in the settling tank to be set up and the settling sludge from the settling tank
To elute phosphorus from the sludge and to add the activated sludge.
The phosphorus elution tank to be solubilized and the processed material from the phosphorus elution tank are solidified.
The solid-liquid separation part for liquid separation, the sludge separated in the solid-liquid separation part
It is fed to the biological treatment device described above, and the separation liquid is fed to it.
Phosphorus is recovered by adding a chemical that insolubilizes the acid ions.
In front of the phosphorus insolubilization tank and the liquid separated from the phosphorus insolubilization tank
Characterized by the provision of a circulation line that supplies the biological treatment equipment
Can be achieved with a phosphorus-containing organic wastewater treatment device
Was found.
【０００５】上記の本発明の構成により以下のような作
用が生ずる。本発明においては、有機性汚水中のリンが
無機凝集剤によって不溶化し、活性汚泥とともに沈殿分
離されるが、その後アルカリ処理によってリンが沈澱汚
泥から溶出され、リン不溶化剤によって該溶出液からリ
ンが回収される。これにより、有機性汚水中のリンを有
効に除去できるとともに、リンを資源として回収できる
ようになる。更に、生物汚泥がアルカリによって加水分
解され、大部分が可溶化しＢＯＤ成分に変わる。これを
曝気槽等の生物処理工程に供給すると、該ＢＯＤは分解
されるので、余剰汚泥発生量が減少する。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。また、本発明においては、鉄系凝集剤または水酸化
鉄を用いることにより、アルカリ処理によりリンが溶出
した鉄系凝集剤または水酸化鉄を生物処理工程にリサイ
クルしてリン吸着に再利用することができるので、新し
い鉄系凝集剤または水酸化鉄の必要量が大きく減少し、
ランニングコストを低減できる。The above-described structure of the present invention has the following effects. In the present invention, the phosphorus in the organic wastewater is insolubilized by the inorganic coagulant and is precipitated and separated together with the activated sludge.After that, the phosphorus is eluted from the sedimented sludge by the alkali treatment, and the phosphorus is insolubilized from the eluate by the phosphorus insolubilizer. Be recovered. As a result, phosphorus in the organic wastewater can be effectively removed and phosphorus can be recovered as a resource. Furthermore, biological sludge is hydrolyzed by alkali, and most of it is solubilized and converted into BOD components. When this is supplied to a biological treatment process such as an aeration tank, the BOD is decomposed and the amount of excess sludge generated is reduced. By reducing the amount of excess sludge generated, rationalization of sludge treatment is achieved. Further, in the present invention, by using an iron-based flocculant or iron hydroxide, the iron-based flocculant or iron hydroxide in which phosphorus is eluted by alkali treatment is recycled to the biological treatment step and reused for phosphorus adsorption. As a result, the required amount of new iron-based coagulant or iron hydroxide is greatly reduced,
The running cost can be reduced.
【０００６】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、ここでは生物処理工程としての生物処理用曝気
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、生物処理槽として、散気管
４が設置されブロワ５から空気が送り込まれる曝気槽１
を用いた場合について説明する。生物処理としては通常
の活性汚泥法、硝化脱窒素法、ゲル等の微生物固定化担
体を用いる方法等を適用することができる。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 biological treatment aeration tank 1 as a biological treatment step, a precipitation tank 2 and a phosphorus recovery means 3 will be described here. Here, an aeration tank 1 in which an air diffuser 4 is installed and air is sent from a blower 5 as a biological treatment tank
The case of using will be described. As the biological treatment, a usual activated sludge method, a nitrification denitrification method, a method using a microorganism-immobilized carrier such as gel, or the like can be applied.
【０００７】有機性汚水６は、曝気槽１に導入され、曝
気槽１には鉄系凝集剤またはあらかじめ作成された水酸
化鉄微粒子（この微粒子の粒径は、好ましくは１〜３μ
ｍである）である凝集剤７が添加され、汚水６中のリン
が凝集ないし吸着によって除去される。ここで、鉄系凝
集剤としては、ＦｅＣｌ3 、Ｆｅ2 （ＳＯ4 ）3 、Ｆｅ
ＳＯ4 、ポリ硫酸鉄（ポリ鉄）等を粒径１〜３μｍとし
たものが挙げられる。ここで、上記凝集剤７の添加量と
しては、例えば２０〜３０mg／リットルである。その凝
集汚泥は、活性汚泥とともに沈殿槽２に送られ、沈殿汚
泥９として沈降分離される。汚泥以外の処理水８は清澄
な処理水である。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。ここで、余剰汚泥１０の量として
は、乾燥固形物としては汚水１ｍ3 当たり４１ｇ程度
で、その容積としては汚水１ｍ3 当たり４リットル程度
である。The organic sewage 6 is introduced into the aeration tank 1, and the aeration tank 1 contains an iron-based coagulant or iron hydroxide fine particles prepared in advance (the particle size of the fine particles is preferably 1 to 3 μm).
The coagulant 7, which is m), is added, and phosphorus in the wastewater 6 is removed by coagulation or adsorption. Here, as the iron-based coagulant, FeCl 3 , Fe 2 (SO 4 ) 3 , Fe
Examples include SO 4 , poly iron sulfate (poly iron) and the like having a particle size of 1 to 3 μm. Here, the amount of the aggregating agent 7 added is, for example, 20 to 30 mg / liter. The coagulated sludge is sent to the settling tank 2 together with the activated sludge, and settled and separated as the settling sludge 9. The treated water 8 other than sludge is clear treated water. A part of the settled sludge 9 is discharged outside the system as a surplus sludge 10. Here, the amount of the excess sludge 10 is about 41 g per 1 m 3 of waste water as a dry solid, and the volume thereof is about 4 liters per 1 m 3 of waste water.
【０００８】余剰汚泥１０以外の沈澱汚泥９である処理
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として曝気槽１に循環され（返
送汚泥１２の量としては、汚水１ｍ3 当たり０．８〜
１．２ｍ3 である）、それ以外のリン回収汚泥１３は、
カセイソーダ等のアルカリ１４の添加を受けてリン溶出
槽１５に流入する。ここで、アルカリとしては、水酸化
ナトリウム、水酸化カリウム等を挙げることができる。
このアルカリをリン溶出槽１５へｐＨが１０以上になる
よう添加する。リン溶出槽１５では、汚泥１３に含まれ
るリンがアルカリ性条件にされることによって液側に溶
出する。さらに汚泥１３に含まれる生物汚泥が加水分解
を受けて可溶化する。該生物汚泥の可溶化を更に促進す
るには温度５０℃以上に加温するのが好ましい。リン溶
出槽１５の温度は５０〜９０℃が特に好ましく、ｐＨは
１０〜１２が好ましい。滞留時間は１２〜２４時間が好
ましい。The treated sludge 11 which is the settled sludge 9 other than the surplus sludge 10 enters the phosphorus recovery means 3. Most of the treated sludge 11 is circulated to the aeration tank 1 as return sludge 12 (the amount of the return sludge 12 is 0.8 to 1 m 3 of wastewater.
1.2 m 3 ), other phosphorus recovery sludge 13
After the alkali 14 such as caustic soda is added, it flows into the phosphorus elution tank 15. Here, examples of the alkali include sodium hydroxide and potassium hydroxide.
This alkali is added to the phosphorus elution tank 15 so that the pH becomes 10 or more. In the phosphorus elution tank 15, the phosphorus contained in the sludge 13 is leached to the liquid side under the alkaline condition. Furthermore, the biological sludge contained in the sludge 13 is hydrolyzed and solubilized. In order to further promote the solubilization of the biological sludge, it is preferable to heat it to a temperature of 50 ° C or higher. The temperature of the phosphorus elution tank 15 is particularly preferably 50 to 90 ° C., and the pH is preferably 10 to 12. The residence time is preferably 12 to 24 hours.
【０００９】リン溶出槽１５に供給するリン回収汚泥１
３の流量ｑは、有機性汚水６（流量Ｑ）中のリン濃度を
Ｃとし、汚泥１３中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。リン溶出槽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１７と分
離汚泥１８に分離される。分離液１７にはカルシウムま
たはマグネシウム等を含むリン酸イオンを不溶化する薬
品１９が添加され、リン不溶化槽２０に送液される。こ
れにより、リン不溶化槽２０においてリン酸カルシウム
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
殿が析出する。この沈殿を固液分離部２１において分離
し、リン資源２２として回収する。ここで、リン酸イオ
ンを不溶化する薬品１９としては、ＣａＣｌ2 、Ｃａ
Ｏ、Ｃａ（ＯＨ）2 、ＭｇＣｌ2 、ＭｇＳＯ4 、Ｍｇ
（ＯＨ）2 などが挙げられる。リン不溶化槽２０の滞留
時間はリン不溶化反応が早いので３０分〜１時間で充分
である。リン不溶化槽２０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、分離液１７のなかのリン濃度に対し当量〜１．５倍
当量で良い。Phosphorus recovery sludge 1 supplied to the phosphorus elution tank 15
The flow rate q of 3 may be set to approximately q≈QC / a, where C is the phosphorus concentration in the organic wastewater 6 (flow rate Q) and a is the phosphorus content rate in the sludge 13. The effluent from the phosphorus elution tank 15 is separated into a separation liquid 17 and a separation sludge 18 in a solid-liquid separation unit 16 such as a centrifugal separator. A chemical 19 that insolubilizes phosphate ions containing calcium, magnesium, or the like is added to the separated liquid 17, and the liquid is sent to the phosphorus insolubilization tank 20. As a result, a phosphorus-containing precipitate such as calcium phosphate or magnesium ammonium phosphate is deposited in the phosphorus insolubilization tank 20. The precipitate is separated in the solid-liquid separation unit 21 and collected as the phosphorus resource 22. Here, as the chemical 19 for insolubilizing phosphate ions, CaCl 2 , Ca
O, Ca (OH) 2 , MgCl 2 , MgSO 4 , Mg
(OH) 2 and the like. The residence time in the phosphorus insolubilizing tank 20 is 30 minutes to 1 hour because the phosphorus insolubilizing reaction is fast. The amount of the chemical added to the phosphorus insolubilizing tank 20 for insolubilizing phosphate ions having calcium, magnesium, etc. may be equivalent to 1.5 times equivalent to the phosphorus concentration in the separation liquid 17.
【００１０】上記方法において、無機凝集剤７として鉄
系凝集剤または水酸化鉄を用いた場合、分離汚泥１８に
は、リン吸着能力が再生された水酸化鉄が含まれ、固液
分離部２１からの分離液には生物汚泥が可溶化したＢＯ
Ｄ成分が多量に含まれているので、分離汚泥１８と該分
離液を曝気槽１に返送し、有機性汚水６におけるリン除
去を更に促進し、且つ生物汚泥の減量化を更に可能にす
る。リン溶出槽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２１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リン含有沈澱の沈
降性が良いので沈殿槽で充分である。In the above method, when an iron-based coagulant or iron hydroxide is used as the inorganic coagulant 7, the separation sludge 18 contains iron hydroxide whose phosphorus adsorption capacity is regenerated, and the solid-liquid separation section 21. In the separated liquid from, the biological sludge solubilized BO
Since the component D is contained in a large amount, the separated sludge 18 and the separated liquid are returned to the aeration tank 1 to further accelerate the phosphorus removal in the organic wastewater 6 and further reduce the amount of biological sludge. Since the settling property of the slurry flowing out from the phosphorus elution tank 15 is not good, the solid-liquid separation section 16 is preferably a centrifugal separator instead of a precipitation tank. The solid-liquid separation unit 21 is made of calcium phosphate,
Since the sedimentation property of the phosphorus-containing precipitate such as magnesium ammonium phosphate is good, a sedimentation tank is sufficient.
【００１１】[0011]
【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、本発明の内容がこれらに限定されるものでは
ない。
実施例１
下水（ＢＯＤ１２０ｍｇ／リットル、ＳＳ１１０ｍｇ／
リットル、リンの濃度３．６ｍｇ／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４６ｇ回収された。また余剰汚
泥発生量は下水１ｍ3 当たり４１ｇと著しく少量であっ
た。処理水の水質は、ＢＯＤ６．８ｍｇ／リットル、Ｓ
Ｓ１０ｍｇ／リットル、リン濃度０．２ｍｇ／リットル
と良好であった。また、塩化第２鉄の注入率は、定常時
において２０ｍｇ／リットルと少なくても良好な処理が
行えた。ここで、水酸化ナトリウムの添加量としては、
リン溶出槽のｐＨが１１になるように設定された。EXAMPLES The present invention will be specifically described below with reference to examples, but the contents of the present invention are not limited to these. Example 1 Sewage (BOD 120 mg / liter, SS 110 mg /
The proof test of the present invention was carried out for a liter and a phosphorus concentration of 3.6 mg / liter. The experimental conditions are shown in Table 1 below. When an experiment was conducted under these conditions, about 46 g of phosphorus in sewage was recovered as hydroxyapatite usable as a fertilizer per 1 m 3 of sewage. The amount of excess sludge generated was 41 g per 1 m 3 of sewage, which was a very small amount. The quality of treated water is BOD 6.8 mg / liter, S
S was 10 mg / liter and phosphorus concentration was 0.2 mg / liter, which were good. Further, the ferric chloride injection rate was as low as 20 mg / liter in the steady state, and good treatment could be performed. Here, as the addition amount of sodium hydroxide,
The pH of the phosphorus elution tank was set to 11.
【００１２】[0012]
【表１】 [Table 1]
【００１３】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。実験条件は上記表−１のｄ〜ｉを除去したａ〜ｃ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０．４ｍｇ／リッ
トルであり、処理水質は本発明と同等であったが、凝集
剤（塩化第二鉄）の注入率が定常時でも１２０ｍｇ／リ
ットルと多量に必要であった。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１９０ｇ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 were in accordance with the conditions a to c in which d to i in Table 1 were removed. The treated water quality was BOD 7 mg / liter, SS 9 mg / liter, phosphorus concentration 0.4 mg / liter, and the treated water quality was equivalent to that of the present invention, but even when the coagulant (ferric chloride) injection rate was steady. A large amount of 120 mg / liter was required. 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 190 g per 1 m 3 of sewage, which was significantly larger than that of the present invention.
【００１４】[0014]
【発明の効果】本発明において、リンを含む有機性汚水
を生物処理する工程に、鉄系凝集剤又は水酸化鉄を添加
してリンを除去し且つ回収することで、該汚水中のリン
を有効に除去でき、且つリン資源として回収できる。ま
た、余剰生物汚泥の発生量及び凝集汚泥の発生量が減少
するので、汚泥処理が著しく合理化される。更に、リン
の除去回収のために用いる鉄系凝集剤または水酸化鉄を
再利用できることから、鉄系凝集剤または水酸化鉄の使
用量を低減できる。INDUSTRIAL APPLICABILITY In the present invention, the phosphorus in the wastewater is removed by adding an iron-based coagulant or iron hydroxide to remove and recover the phosphorus in the step of biologically treating the organic wastewater containing phosphorus. It can be effectively removed and can be recovered as a phosphorus resource. In addition, the amount of surplus biological sludge and the amount of coagulated sludge are reduced, so that sludge treatment is significantly rationalized. Furthermore, since the iron-based coagulant or iron hydroxide used for removing and recovering phosphorus can be reused, the amount of the iron-based coagulant or iron hydroxide used can be reduced.
【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 生物処理曝気槽 ２ 沈澱槽 ３ リン回収手段 ４ 散気管 ５ ブロワ ６ 有機性汚水 ７ 無機凝集剤 ８ 処理水 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 リン溶出槽 １６ 固液分離部 １７ 分離液 １８ 分離汚泥 １９ リン酸イオン不溶化薬品 ２０ リン不溶化槽 ２１ 固液分離部 ２２ リン資源 1 Biological treatment aeration tank 2 settling tank 3 phosphorus recovery means 4 Air diffuser 5 Blower 6 organic wastewater 7 Inorganic coagulant 8 treated water 9 Settled sludge 10 excess sludge 11 Treated sludge 12 Return sludge 13 Phosphorus recovery sludge 14 alkali 15 Phosphorus elution tank 16 Solid-liquid separation unit 17 Separation liquid 18 Separation sludge 19 Phosphate ion insolubilizing chemicals 20 Phosphorus insolubilization tank 21 Solid-liquid separation unit 22 Phosphorus resources
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０２Ｆ 3/30 ＺＡＢ Ｃ０２Ｆ 3/30 ＺＡＢＣ 11/00 ＺＡＢ 11/00 ＺＡＢＢ ＺＡＢＣ (56)参考文献 特開 平６−182383（ＪＰ，Ａ) 特開 平８−24873（ＪＰ，Ａ) 特開 平７−232175（ＪＰ，Ａ) 特開 平７−232161（ＪＰ，Ａ) 特開 平４−71699（ＪＰ，Ａ) 特開 昭58−3689（ＪＰ，Ａ) 特開 平６−79300（ＪＰ，Ａ) 特開 平５−309391（ＪＰ，Ａ) 特開 昭64−51200（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 1/52 - 1/56 B01D 21/01 C02F 1/58 C02F 3/12 C02F 3/30 C02F 11/00 - 11/20 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI C02F 3/30 ZAB C02F 3/30 ZABC 11/00 ZAB 11/00 ZABB ZABC (56) Reference JP-A-6-182383 (JP) , A) JP 8-24873 (JP, A) JP 7-232175 (JP, A) JP 7-232161 (JP, A) JP 4-71699 (JP, A) JP 58-3689 (JP, A) JP 6-79300 (JP, A) JP 5-309391 (JP, A) JP 64-51200 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C02F 1/52-1/56 B01D 21/01 C02F 1/58 C02F 3/12 C02F 3/30 C02F 11/00-11/20
Claims (2)
程に、鉄系凝集剤または水酸化鉄を添加してリンを不溶
化させ、該リン不溶化物を活性汚泥と共に沈殿させたの
ち、該沈殿汚泥にアルカリ剤を添加して汚泥からリンを
溶出させ且つ該活性汚泥を可溶化し、その後固液分離
し、該分離汚泥は前記の生物処理工程に供給し、分離液
はリン酸イオンを不溶化する薬品を添加してリンを回収
した後、前記生物処理工程に供給することを特徴とする
リン含有有機性汚水の処理方法。1. In the step of biologically treating an organic wastewater containing phosphorus, an iron-based coagulant or iron hydroxide is added to insolubilize phosphorus, and the phosphorus insolubilized product is precipitated together with activated sludge, and then the precipitate is added. An alkaline agent is added to the sludge to elute phosphorus from the sludge and the activated sludge is solubilized, followed by solid-liquid separation, the separated sludge is supplied to the biological treatment step, and the separation liquid insolubilizes phosphate ions. A method for treating a phosphorus-containing organic wastewater, comprising adding the chemicals to recover the phosphorus and then supplying it to the biological treatment step.
集剤または水酸化鉄を添加してリンを不溶化させる生物Organisms that add phosphorus or iron hydroxide to insolubilize phosphorus
処理装置、前記生物処理装置の該リン不溶化物を活性汚The treatment device, the phosphorus insolubilized material of the biological treatment device is activated
泥と共に沈殿させる沈殿槽、該沈殿槽からの沈殿汚泥にSettling tank to settle with mud, settling sludge from the settling tank
アルカリ剤を添加して汚泥からリンを溶出させ且つ該活Add an alkaline agent to elute phosphorus from the sludge and
性汚泥を可溶化するリン溶出槽、前記リン溶出槽からのElution tank for solubilizing activated sludge from the phosphorus elution tank
処理物を固液分離する固液分離部、前記固液分離部でのIn the solid-liquid separation part for solid-liquid separation of the processed material, the solid-liquid separation part
分離汚泥を前記の生物処理装置に供給し、分離液を供給Supply the separated sludge to the above biological treatment equipment and supply the separated liquid
しそれにリン酸イオンを不溶化する薬品を添加してリンThen, add a chemical that makes phosphate ions insoluble to
を回収するリン不溶化槽、及び前記リン不溶化槽からのA phosphorus insolubilizing tank for recovering
分離液を前記生物処理装置に供給する循環管路を設けたA circulation line was provided to supply the separated liquid to the biological treatment device.
ことを特徴とするリン含有有機性汚水の処理装置。A treatment device for phosphorus-containing organic wastewater, which is characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18901094A JP3516309B2 (en) | 1994-07-20 | 1994-07-20 | Method and apparatus for treating phosphorus-containing organic wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18901094A JP3516309B2 (en) | 1994-07-20 | 1994-07-20 | Method and apparatus for treating phosphorus-containing organic wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0824872A JPH0824872A (en) | 1996-01-30 |
| JP3516309B2 true JP3516309B2 (en) | 2004-04-05 |
Family
ID=16233794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18901094A Expired - Fee Related JP3516309B2 (en) | 1994-07-20 | 1994-07-20 | Method and apparatus for treating phosphorus-containing organic wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3516309B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RS49639B (en) * | 1998-05-14 | 2007-08-03 | Soll, Peter, | Use of alkaline earth peroxides for immobilising phosphate in waters, soils, sediments and/or sludges |
| JP4132256B2 (en) * | 1998-07-27 | 2008-08-13 | 大八化学工業株式会社 | Method for producing halogen-containing phosphate ester |
| JP3499151B2 (en) * | 1999-04-19 | 2004-02-23 | 久夫 大竹 | Sludge treatment method and organic wastewater treatment method including the treatment method |
| JP3978303B2 (en) * | 2000-04-07 | 2007-09-19 | シャープ株式会社 | Waste water treatment method and waste water treatment equipment |
| JP4680403B2 (en) * | 2001-03-09 | 2011-05-11 | 住友重機械エンバイロメント株式会社 | Wastewater treatment method and apparatus |
| US7070747B2 (en) | 2003-06-02 | 2006-07-04 | Mitsubishi Denki Kabushiki Kaisha | Process of eluting and recovering phosphorus from sludge |
| JP4829610B2 (en) * | 2004-12-28 | 2011-12-07 | 財団法人電力中央研究所 | Production method of adsorbent mainly composed of hydroxyapatite crystals |
| US20090193863A1 (en) * | 2008-02-05 | 2009-08-06 | The United States Of America, As Represented By The Secretary Of Agriculture | Process for Removing and Recovering Phosphorus from Animal Waste |
| JP4854706B2 (en) * | 2008-06-09 | 2012-01-18 | 水ｉｎｇ株式会社 | Organic wastewater treatment method and treatment apparatus |
| US20190010065A1 (en) * | 2015-12-21 | 2019-01-10 | Kemira Oyj | Process for producing a phosphorus product from wastewater |
| JP6649091B2 (en) * | 2016-01-12 | 2020-02-19 | 日立造船株式会社 | Phosphorus recovery method and phosphorus recovery equipment |
-
1994
- 1994-07-20 JP JP18901094A patent/JP3516309B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0824872A (en) | 1996-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3526081B2 (en) | Organic wastewater treatment method and apparatus | |
| JP3516309B2 (en) | Method and apparatus for treating phosphorus-containing organic wastewater | |
| JP5128735B2 (en) | Recovery and reuse of phosphorus and flocculant in wastewater | |
| JPH09108690A (en) | Treatment of phosphorus containing sewage | |
| JP3442205B2 (en) | Treatment method for phosphorus-containing wastewater | |
| JP2972923B2 (en) | Wastewater treatment system for desalination equipment | |
| JP3927368B2 (en) | Water treatment equipment | |
| JP2002086099A (en) | Method and apparatus for treating organism-origin organic waste | |
| JP2002205077A (en) | Method and apparatus for treating organic sewage | |
| JP2002018489A (en) | Phosphorus recovery method | |
| JP2002143883A (en) | Method for treating organic polluted water containing phosphorus | |
| JPH0741243B2 (en) | Organic wastewater treatment method | |
| JP3511430B2 (en) | Organic wastewater treatment method | |
| JP2002316192A (en) | Method and apparatus for treating organic foul water | |
| JP2002326088A (en) | Method and apparatus for treating phosphorous and cod- containing water | |
| JP3277832B2 (en) | Method for treating phosphorus recovered from sewage treatment water | |
| JP3442204B2 (en) | Organic wastewater phosphorus removal and recovery method | |
| JP2001232372A (en) | Treatment process for water containing boron | |
| JP2002316191A (en) | Method and apparatus for treating organic foul water | |
| JP3449855B2 (en) | Biological phosphorus removal method and apparatus for organic wastewater | |
| JP2000308895A (en) | Treatment of organic sewage | |
| JPS63258692A (en) | Treatment of organic sewage | |
| JP3853922B2 (en) | Method for removing phosphorus from organic sludge | |
| JP2002361277A (en) | Treating method and treating apparatus for organic contaminated water | |
| KR960011889B1 (en) | Method for treatment of waste water from reclaimed land |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040114 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040115 |
|
| LAPS | Cancellation because of no payment of annual fees |