JP2000301166A - Waste water treatment apparatus - Google Patents
Waste water treatment apparatusInfo
- Publication number
- JP2000301166A JP2000301166A JP11107725A JP10772599A JP2000301166A JP 2000301166 A JP2000301166 A JP 2000301166A JP 11107725 A JP11107725 A JP 11107725A JP 10772599 A JP10772599 A JP 10772599A JP 2000301166 A JP2000301166 A JP 2000301166A
- Authority
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- Japan
- Prior art keywords
- reaction tank
- diameter
- hydroxyapatite
- wastewater
- small
- 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.)
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Abstract
(57)【要約】
【課題】 消化槽脱離液のようなリンを高濃度で含有す
る廃水からリンをヒドロキシアパタイトとして回収す
る。
【解決手段】 底面を漏斗状に形成した有底円筒状の反
応槽１と、該反応槽１の内部に設けられた大径小径２個
の円筒体２，３と、大径円筒体２の内周部上方に設けら
れた廃水流入部４、カルシウム化合物供給部５及びｐＨ
調整剤供給部６と、小径円筒体３の内部に下向流を発生
させる撹拌翼７１を設けた撹拌機７と、反応槽１の底部
に設けられた生成物排出部８及び分級用給水部９と、反
応槽１の上部に設けられた処理水排出部１０とを備えて
いる。
(57) [Summary] [PROBLEMS] To recover phosphorus as hydroxyapatite from wastewater containing a high concentration of phosphorus, such as a digester desorption solution. SOLUTION: A bottomed cylindrical reaction tank 1 having a funnel-shaped bottom surface, two large-diameter and small-diameter cylinders 2 and 3 provided inside the reaction tank 1 and a large-diameter cylinder 2 are provided. Wastewater inflow section 4, calcium compound supply section 5, and pH provided above the inner periphery
A regulator supply unit 6, a stirrer 7 provided with a stirring blade 71 for generating a downward flow inside the small-diameter cylindrical body 3, a product discharge unit 8 provided at the bottom of the reaction tank 1, and a classification water supply unit 9 and a treated water discharge unit 10 provided at the upper part of the reaction tank 1.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、廃水処理装置に関
し、詳しくは、下水処理における生物学的脱リン法で発
生する汚泥処理分離液のようなリン酸イオンを含む廃水
にカルシウム化合物とｐＨ調整剤とを加えて反応させ、
結晶状態のヒドロキシアパタイトを生成させて分離回収
するための廃水処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment apparatus, and more particularly to a calcium compound and a pH control method for wastewater containing phosphate ions such as a sludge treatment separation liquid generated by a biological phosphorus removal method in sewage treatment. And react with
The present invention relates to a wastewater treatment apparatus for generating and separating and recovering hydroxyapatite in a crystalline state.
【０００２】[0002]
【従来の技術】従来から、廃水中のリンを除去するため
の方法として、例えば、リン酸イオンを含む廃水に消石
灰等のカルシウム化合物を添加してカルシウムイオンを
発生させ、かつ、ヒドロキシアパタイトの生成に十分な
ｐＨに調整した状態で脱リン剤に接触させ、脱リン剤の
表面にヒドロキシアパタイトを析出させて除去する方法
が知られている。脱リン剤としては、リン鉱石、マグネ
シアクリンカ、骨炭等が用いられている。2. Description of the Related Art Conventionally, as a method for removing phosphorus in wastewater, for example, a calcium compound such as slaked lime is added to wastewater containing phosphate ions to generate calcium ions and to form hydroxyapatite. A method is known in which the pH is adjusted to a sufficient level to contact a dephosphorizing agent, and hydroxyapatite is precipitated on the surface of the dephosphorizing agent and removed. Phosphorus ore, magnesia clinker, bone charcoal and the like are used as the dephosphorizing agent.
【０００３】上記方法は、一般に、原水のｐＨを調整
し、砂ろ過槽を通して原水中の浮遊性固形物を除去した
後、脱リン剤を充填した充填槽に導入し、液と脱リン剤
とを接触させることにより行われている。[0003] In the above method, generally, the pH of raw water is adjusted, the suspended solids in the raw water are removed through a sand filtration tank, and then the liquid is introduced into a filling tank filled with a dephosphorizing agent. This is done by contacting.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記脱リン
剤を用いる方法では、運転開始初期の段階では、脱リン
剤の表面の凹凸によって十分な反応面積が得られている
が、晶析反応の進行に伴って生成したヒドロキシアパタ
イト等が脱リン剤の表面を覆うため、反応が起こる面積
が減少して脱リン性能を低下させる一因となっていた。However, in the above method using a dephosphorizing agent, a sufficient reaction area is obtained due to the unevenness of the surface of the dephosphorizing agent at the initial stage of the operation, but the crystallization reaction is difficult. Since hydroxyapatite and the like generated as the process proceeds covers the surface of the dephosphorizing agent, the area where the reaction occurs is reduced, which is one of the causes of lowering the dephosphorizing performance.
【０００５】さらに、脱リン剤の肥大によって充填槽が
閉塞してしまうことがあるため、ヒドロキシアパタイト
が晶析した脱リン剤の回収に十分注意する必要があっ
た。[0005] Further, since the filling tank may be closed due to the enlargement of the dephosphorizing agent, it is necessary to pay close attention to the recovery of the dephosphorizing agent crystallized with hydroxyapatite.
【０００６】そこで、本発明は、例えば、消化槽脱離液
のようなリンを高濃度で含有する廃水から、リンをヒド
ロキシアパタイトとして化学的に効率よく反応・結晶化
させることができ、経済的にヒドロキシアパタイトの結
晶を回収することができる廃水処理装置を提供すること
を目的としている。Accordingly, the present invention is capable of efficiently reacting and crystallizing phosphorus as hydroxyapatite from wastewater containing a high concentration of phosphorus such as a digester tank desorbent, and is economical. Another object of the present invention is to provide a wastewater treatment apparatus capable of recovering hydroxyapatite crystals.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明の廃水処理装置は、リン酸イオンを含む廃水
にカルシウム化合物とｐＨ調整剤とを加えて撹拌し、生
成したヒドロキシアパタイトを分離回収する廃水処理装
置であって、有底筒状の反応槽内に、槽中心軸を中心と
して、大径小径２個の筒体を槽底部から所定距離上方に
二重管状に配設し、外側の大径筒体の上部を液面より突
出させ、内側の小径筒体の上部を液面下に配置するとと
もに、前記廃水の流入部、カルシウム化合物の供給部及
びｐＨ調整剤の供給部を大径筒体の内側に設け、かつ、
小径筒体の内部に上昇流又は下向流を発生させる撹拌手
段を設け、前記反応槽の底部に生成したヒドロキシアパ
タイトを回収する生成物排出部及び分級用給水部を設
け、反応槽上部外周に処理水排出部を設けたことを特徴
としている。Means for Solving the Problems To achieve the above object, a wastewater treatment apparatus of the present invention comprises a calcium compound and a pH adjuster added to wastewater containing phosphate ions and stirred to separate the generated hydroxyapatite. A wastewater treatment device to be recovered, wherein two large-diameter and small-diameter cylinders are arranged in a double-tube shape with a predetermined distance above the bottom of the tank, around the center axis of the tank, in a bottomed tubular reaction tank, The upper portion of the outer large-diameter cylinder projects from the liquid surface, and the upper portion of the inner small-diameter cylinder is disposed below the liquid surface.The inflow portion of the wastewater, the supply portion of the calcium compound, and the supply portion of the pH adjuster are provided. Provided inside the large-diameter cylinder, and
A stirring means for generating an upward flow or a downward flow is provided inside the small-diameter cylindrical body, and a product discharge section and a classification water supply section for recovering hydroxyapatite generated at the bottom of the reaction tank are provided. It is characterized by having a treated water discharge section.
【０００８】[0008]
【発明の実施の形態】図１は本発明の廃水処理装置の一
形態例を示す断面図である。この廃水処理装置は、上部
が大径で底面を漏斗状に形成した有底円筒状の反応槽１
と、該反応槽１の内部に設けられた大径小径２個の円筒
体２，３と、大径円筒体２の内周部上方に設けられた廃
水流入部４、カルシウム化合物供給部５及びｐＨ調整剤
供給部６と、小径円筒体３の内部に下向流を発生させる
撹拌手段である撹拌翼７１を設けた撹拌機７と、反応槽
１の底部に設けられた生成物排出部８及び分級用給水部
９と、反応槽１の上部に設けられた処理水排出部１０と
により形成されている。FIG. 1 is a sectional view showing an embodiment of a wastewater treatment apparatus according to the present invention. This wastewater treatment apparatus has a cylindrical bottomed reaction tank 1 having a large diameter at the top and a funnel at the bottom.
A large-diameter small-diameter two cylindrical bodies 2 and 3 provided inside the reaction tank 1, a wastewater inflow section 4 provided above an inner peripheral portion of the large-diameter cylindrical body 2, a calcium compound supply section 5, A pH adjuster supply unit 6, a stirrer 7 provided with stirring blades 71 serving as stirring means for generating a downward flow inside the small-diameter cylindrical body 3, and a product discharge unit 8 provided at the bottom of the reaction tank 1. A water supply section 9 for classification and a treated water discharge section 10 provided at an upper portion of the reaction tank 1 are formed.
【０００９】上記大径円筒体２は、反応槽１上部の大径
部内に設けられており、上端は水面より上方に位置する
ように設置されている。この大径円筒体２の内部に設置
される小径円筒体３は、大径円筒体２の内周部及び反応
槽１の下部内周部との間をドラフトチューブ型撹拌部と
するものであって、内部の撹拌翼７１により小径円筒体
３の内周部に下向流が、外周側に上昇流がそれぞれ形成
されて循環流となる。The large-diameter cylindrical body 2 is provided in a large-diameter portion on the upper part of the reaction tank 1, and the upper end is installed so as to be located above the water surface. The small-diameter cylindrical body 3 installed inside the large-diameter cylindrical body 2 has a draft tube-type stirring section between the inner peripheral portion of the large-diameter cylindrical body 2 and the lower inner peripheral portion of the reaction tank 1. Thus, a downward flow is formed on the inner peripheral portion of the small-diameter cylindrical body 3 and an upward flow is formed on the outer peripheral side of the small-diameter cylindrical body 3 by the internal agitating blades 71 to form a circulation flow.
【００１０】また、大径円筒体２の外周部と、反応槽１
上部の大径部の内周部との間は、廃水流入部４から流入
する廃水量に略相当する水が上昇し、生成したヒドロキ
シアパタイトの結晶を、その上昇過程で沈降分離させる
生成物分離部として作用する。この部分は、ヒドロキシ
アパタイトの小結晶や、衝突により発生した小片も確実
に沈降させることができる十分な水面積を有している。The outer peripheral portion of the large-diameter cylindrical body 2 and the reaction tank 1
Between the inner peripheral portion of the upper large diameter portion, water substantially corresponding to the amount of wastewater flowing from the wastewater inflow portion 4 rises, and the generated hydroxyapatite crystals settle and separate during the rising process. Acts as a part. This part has a sufficient water area that small crystals of hydroxyapatite and small pieces generated by collision can be surely settled.
【００１１】さらに、前記生成物排出部８及び分級用給
水部９は、反応槽１の底部に連通する配管８１に二連バ
ルブ８２，８３を設けるとともに、雑用水等からなる分
級用水を供給する配管９１，バルブ９２を設けたもので
ある。Further, the product discharge section 8 and the classification water supply section 9 are provided with dual valves 82 and 83 in a pipe 81 communicating with the bottom of the reaction tank 1 and supply classification water such as miscellaneous water. A pipe 91 and a valve 92 are provided.
【００１２】このように形成した廃水処理装置におい
て、廃水流入部４から流入するリン酸イオンを含む廃水
は、カルシウム化合物供給部５から供給されるカルシウ
ムイオン含有水とともに、大径円筒体内周側の撹拌部を
循環する循環流中に投入され、撹拌翼７１による撹拌作
用及び下降流形成作用により、循環する水及びヒドロキ
シアパタイトの結晶と十分に混和されながら小径円筒体
３の内周部を下降する。In the wastewater treatment apparatus formed as described above, the wastewater containing phosphate ions flowing from the wastewater inflow section 4 together with the calcium ion-containing water supplied from the calcium compound supply section 5 is provided on the inner peripheral side of the large-diameter cylindrical body. It is thrown into the circulating flow circulating through the stirrer and descends along the inner periphery of the small-diameter cylindrical body 3 while being sufficiently mixed with the circulating water and hydroxyapatite crystals by the stirring action and the descending flow forming action of the stirring blade 71. .
【００１３】そして、一部の水が大径円筒体２の外周部
と反応槽１の上部内周部との間を上昇して処理水排出部
１０からオーバーフローして配管１１に排出される他
は、小径円筒体３の外周面と大径円筒体２の内周面及び
反応槽１の下部内周部との間を上昇して循環流を形成す
る。一方、ｐＨ調整剤供給部６から供給されるｐＨ調整
剤により反応槽１内の水のｐＨが所定のｐＨ値に調節さ
れることにより、反応槽１内でリン酸イオンとカルシウ
ムイオンとの反応が下記反応式により進行してヒドロキ
シアパタイトが生成する。 １０Ｃａ２＋＋６ＰＯ４ ３−＋２ＯＨ− → Ｃａ
１０(ＯＨ)(ＰＯ４)６ Then, some of the water rises between the outer peripheral portion of the large-diameter cylindrical body 2 and the upper inner peripheral portion of the reaction tank 1, overflows from the treated water discharge section 10 and is discharged to the pipe 11. Rises between the outer peripheral surface of the small diameter cylindrical body 3, the inner peripheral surface of the large diameter cylindrical body 2, and the lower inner peripheral part of the reaction tank 1 to form a circulating flow. On the other hand, the pH of the water in the reaction tank 1 is adjusted to a predetermined pH value by the pH adjusting agent supplied from the pH adjusting agent supply unit 6, whereby the reaction between phosphate ions and calcium ions in the reaction tank 1 is performed. Proceeds according to the following reaction formula to generate hydroxyapatite. 10Ca 2+ + 6PO 4 3- + 2OH − → Ca
10 (OH) (PO 4 ) 6
【００１４】このヒドロキシアパタイトの生成反応は、
主として各イオンの濃度が高いドラフトチューブ型撹拌
部で行われ、ヒドロキシアパタイトの生成反応がヒドロ
キシアパタイトの結晶表面で行われることにより、次第
に成長して大粒の結晶粒子となる。このヒドロキシアパ
タイトの結晶粒子は、水との比重差により反応槽１の底
部に沈降する。また、廃水中のＳＳ成分等は、大径円筒
体２の外周部と反応槽１の上部内周部との間を処理水と
ともに上昇して処理水排出部１０から排出される。The reaction for producing hydroxyapatite is as follows:
It is mainly performed in a draft tube type stirring section where the concentration of each ion is high, and the hydroxyapatite generation reaction is performed on the hydroxyapatite crystal surface, whereby the hydroxyapatite crystal grows gradually and becomes large crystal particles. The hydroxyapatite crystal particles settle at the bottom of the reaction tank 1 due to a difference in specific gravity from water. In addition, SS components and the like in the wastewater rise between the outer peripheral portion of the large diameter cylindrical body 2 and the upper inner peripheral portion of the reaction tank 1 together with the treated water and are discharged from the treated water discharge unit 10.
【００１５】また、反応槽１の底部には、ヒドロキシア
パタイトの比較的大きな結晶粒子が主として沈殿する
が、粗大粒子の間隙に入り込んだ微細結晶や廃水中の浮
遊物（ＳＳ成分や副産物等）は、粒度を不均一にするだ
けではなく、回収物の純度を悪化させる原因となる。し
たがって、反応槽１内にある程度のヒドロキシアパタイ
トが生成したときに、分級用給水部９のバルブ９２を開
いて配管９１から分級用水を供給し、反応槽１の底部に
上昇流を発生させることにより、ヒドロキシアパタイト
の微細結晶と粗大結晶とを分級し、同時に、浮遊物を分
離してヒドロキシアパタイトの洗浄を行う。これによ
り、ヒドロキシアパタイトの粗大結晶のみを反応槽１の
底部、生成物排出部８の部分に集めることができる。At the bottom of the reaction tank 1, relatively large crystal particles of hydroxyapatite mainly precipitate, but fine crystals and suspended matters (such as SS components and by-products) in wastewater that have entered the gaps between the coarse particles are not precipitated. This not only makes the particle size non-uniform, but also deteriorates the purity of the recovered material. Therefore, when a certain amount of hydroxyapatite is generated in the reaction tank 1, the valve 92 of the classification water supply unit 9 is opened to supply the classification water from the pipe 91, and an ascending flow is generated at the bottom of the reaction tank 1. Then, the fine crystals and the coarse crystals of hydroxyapatite are classified, and at the same time, the suspended matter is separated and the hydroxyapatite is washed. Thereby, only the hydroxyapatite coarse crystals can be collected at the bottom of the reaction tank 1 and the product discharge section 8.
【００１６】次いで、バルブ８２を開いた状態でバルブ
９２を閉じて分級用水を止めると、反応槽底部のヒドロ
キシアパタイトの粗大結晶が下方のバルブ８３の上方に
落下するので、上方のバルブ８２を閉じた後に下方のバ
ルブ８３を開くことにより、二連バルブ８２，８３間の
ヒドロキシアパタイトの粗大結晶を若干の処理水ととも
に取り出すことができる。Next, when the classifying water is stopped by closing the valve 92 with the valve 82 opened, the coarse hydroxyapatite crystals at the bottom of the reaction tank fall above the lower valve 83, so that the upper valve 82 is closed. After that, by opening the lower valve 83, coarse crystals of hydroxyapatite between the two valves 82, 83 can be taken out together with some treated water.
【００１７】取り出したヒドロキシアパタイトは、水切
り後に搬送・回収されて緩効性肥料として使用され、さ
らに、アンモニウム塩及びカリウム塩を混合して造粒等
の加工を施すことにより、植物の三大栄養素を含む肥料
として有効に利用することができる。The removed hydroxyapatite is conveyed and collected after draining and used as a slow-release fertilizer. Further, by mixing ammonium salts and potassium salts and subjecting the mixture to granulation, the three major nutrients of the plant are obtained. It can be effectively used as a fertilizer containing.
【００１８】また、ヒドロキシアパタイトの粗大結晶か
ら分離上昇した微細結晶は、再び撹拌部に流入すること
により次第に成長して大粒の結晶粒子となる。また、生
成物分離部に流入した微細結晶は再び沈降し、浮遊物は
処理水とともに上昇して処理水排出部１０から排出され
る。したがって、ヒドロキシアパタイトの流出を抑制し
ながら浮遊物が反応槽１内に蓄積することを防止でき
る。Further, the fine crystals separated and raised from the coarse crystals of hydroxyapatite flow again into the stirring section and gradually grow into large crystal particles. Further, the fine crystals flowing into the product separation section settle again, and the suspended matter rises together with the treated water and is discharged from the treated water discharge section 10. Therefore, it is possible to prevent the suspended matter from accumulating in the reaction tank 1 while suppressing the outflow of hydroxyapatite.
【００１９】定常運転状態では、廃水流入部４，カルシ
ウム化合物供給部５及びｐＨ調整剤供給部６からそれぞ
れ所定量の廃水、カルシウム化合物及びｐＨ調整剤が注
入されることによってヒドロキシアパタイトの結晶成長
が行われるとともに、適当な時間間隔で分級用給水部９
からの注水によるヒドロキシアパタイト結晶の分級及び
洗浄と、生成物排出部８の二連バルブ８２，８３の操作
によるヒドロキシアパタイト結晶の取り出しとが行われ
る。In a steady state of operation, a predetermined amount of wastewater, a calcium compound and a pH adjuster are injected from the wastewater inflow section 4, the calcium compound supply section 5 and the pH adjuster supply section 6, respectively, whereby crystal growth of hydroxyapatite is performed. It is performed and at appropriate time intervals, the water supply section for classification 9
Classification and washing of the hydroxyapatite crystal by water injection from the nozzle, and removal of the hydroxyapatite crystal by operating the dual valves 82 and 83 of the product discharge section 8 are performed.
【００２０】したがって、配管等がスケールにより閉塞
することがなく、スケール除去のために装置を停止する
必要がほとんどないので、下水処理設備等における廃水
中のリンを、肥料として極めて有効なヒドロキシアパタ
イトとして連続的に回収することができる。特に、分級
により、大きな結晶のみを回収するため、品質面でも優
れており、その取扱いも容易である。Therefore, the pipes and the like are not clogged by scale and there is almost no need to stop the apparatus for scale removal. Therefore, phosphorus in wastewater in sewage treatment equipment or the like can be converted into hydroxyapatite which is extremely effective as a fertilizer. It can be collected continuously. In particular, since only large crystals are recovered by classification, the quality is excellent and the handling is easy.
【００２１】また、大径小径２個の円筒体２，３及び反
応槽１の下部で形成したドラフトチューブ型撹拌部にお
ける撹拌機７による撹拌状態を適当に設定することによ
り、十分かつ均一な撹拌を行うことができ、ヒドロキシ
アパタイトの結晶を十分に混和させることができる。こ
れにより、ヒドロキシアパタイトの生成反応をヒドロキ
シアパタイトの結晶表面で行わせることができ、反応槽
１及び円筒体２，３の各壁面でのスケールの発生を抑制
することができる。Further, by appropriately setting the stirring state of the stirrer 7 in the draft tube type stirring section formed at the lower part of the two large and small cylindrical bodies 2 and 3 and the reaction tank 1, sufficient and uniform stirring can be achieved. And the hydroxyapatite crystals can be sufficiently mixed. Thereby, the hydroxyapatite generation reaction can be performed on the hydroxyapatite crystal surface, and the generation of scale on each wall surface of the reaction tank 1 and the cylindrical bodies 2 and 3 can be suppressed.
【００２２】さらに、反応槽１の底部に沈殿した微細結
晶を分級操作により、撹拌部に戻すことができることか
ら、撹拌部における反応生成物（ヒドロキシアパタイ
ト）濃度を常に所定量以上に確保できるため、反応速度
を高くすることができ、装置内での滞留時間を短縮する
ことが可能となり、装置全体を非常にコンパクトに設計
することができる。Further, since fine crystals settled at the bottom of the reaction tank 1 can be returned to the stirring section by a classification operation, the concentration of the reaction product (hydroxyapatite) in the stirring section can always be maintained at a predetermined level or more. The reaction rate can be increased, the residence time in the apparatus can be shortened, and the entire apparatus can be designed to be very compact.
【００２３】[0023]
【発明の効果】以上説明したように、本発明の廃水処理
装置によれば、下水処理設備における生物脱リン法の汚
泥処理水等に含まれるリンを、肥料として有用なヒドロ
キシアパタイトの粗大結晶として効率よく回収すること
ができる。As described above, according to the wastewater treatment apparatus of the present invention, phosphorus contained in sludge treated water in the biological dephosphorization method in sewage treatment equipment is converted into coarse hydroxyapatite crystals useful as fertilizers. It can be collected efficiently.
【図１】 本発明の廃水処理装置の一形態例を示す断面
図である。FIG. 1 is a cross-sectional view showing one embodiment of a wastewater treatment apparatus according to the present invention.
【符号の説明】 １…反応槽、２…大径円筒体、３…小径円筒体、４…廃
水流入部、５…カルシウム化合物供給部、６…ｐＨ調整
剤供給部、７…撹拌機、８…生成物排出部、９…分級用
給水部、１０…処理水排出部[Description of Signs] 1 ... Reaction tank, 2 ... Large-diameter cylinder, 3 ... Small-diameter cylinder, 4 ... Wastewater inflow section, 5 ... Calcium compound supply section, 6 ... pH regulator supply section, 7 ... Agitator, 8 ... Product discharge part, 9 ... Classification water supply part, 10 ... Treatment water discharge part
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｄ 9/02 ６０５ Ｂ０１Ｄ 9/02 ６０５ ６０８ ６０８Ｂ ６０９ ６０９Ｂ ６１４ ６１４ ６１６ ６１６ ６１７ ６１７ ６１９ ６１９Ａ ６２０ ６２０ ６２５ ６２５Ｆ ６２５Ｚ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B01D 9/02 605 B01D 9/02 605 608 608B 609 609B 614 614 616 616 616 617 617 618 1919 620 625 625 625 625 625 F
Claims (1)
合物とｐＨ調整剤とを加えて撹拌し、生成したヒドロキ
シアパタイトを分離回収する廃水処理装置であって、有
底筒状の反応槽内に、槽中心軸を中心として、大径小径
２個の筒体を槽底部から所定距離上方に二重管状に配設
し、外側の大径筒体の上部を液面より突出させ、内側の
小径筒体の上部を液面下に配置するとともに、前記廃水
の流入部、カルシウム化合物の供給部及びｐＨ調整剤の
供給部を大径筒体の内側に設け、かつ、小径筒体の内部
に上昇流又は下向流を発生させる撹拌手段を設け、前記
反応槽の底部に生成したヒドロキシアパタイトを回収す
る生成物排出部及び分級用給水部を設け、反応槽上部外
周に処理水排出部を設けたことを特徴とする廃水処理装
置。1. A wastewater treatment device for adding and stirring a calcium compound and a pH adjuster to wastewater containing phosphate ions and separating and recovering the generated hydroxyapatite, wherein a bottomed tubular reaction vessel is provided. Two large-diameter and small-diameter cylinders are arranged in a double tube above the bottom of the tank by a predetermined distance from the tank center axis, and the upper part of the outer large-diameter cylinder projects from the liquid surface to form an inner small-diameter cylinder. The upper part of the body is disposed below the liquid level, and the inflow part of the wastewater, the supply part of the calcium compound and the supply part of the pH adjusting agent are provided inside the large-diameter cylinder, and the upflow flows into the small-diameter cylinder. Alternatively, a stirring means for generating a downward flow is provided, a product discharge section for recovering the generated hydroxyapatite and a water supply section for classification are provided at the bottom of the reaction tank, and a treated water discharge section is provided on the outer periphery of the upper section of the reaction tank. A wastewater treatment device characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11107725A JP2000301166A (en) | 1999-04-15 | 1999-04-15 | Waste water treatment apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11107725A JP2000301166A (en) | 1999-04-15 | 1999-04-15 | Waste water treatment apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000301166A true JP2000301166A (en) | 2000-10-31 |
Family
ID=14466377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11107725A Pending JP2000301166A (en) | 1999-04-15 | 1999-04-15 | Waste water treatment apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000301166A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001058102A (en) * | 1999-08-23 | 2001-03-06 | Nishihara Environ Sanit Res Corp | Fluidized bed crystallization reactor |
| JP2005007257A (en) * | 2003-06-18 | 2005-01-13 | Ataka Construction & Engineering Co Ltd | Phosphorus recovering apparatus and method for treating phosphorus-containing organic wastewater |
| JP2008073589A (en) * | 2006-09-20 | 2008-04-03 | Japan Organo Co Ltd | Fluorine crystallization technology |
| JP2009119380A (en) * | 2007-11-15 | 2009-06-04 | Japan Organo Co Ltd | Crystallization reactor and crystallization reaction method |
| JP2015142881A (en) * | 2014-01-31 | 2015-08-06 | 昭和環境システム株式会社 | Crystallization device |
| CN108067010A (en) * | 2017-12-22 | 2018-05-25 | 南京工业大学 | Recrystallization device for efficient purification and reuse of salt slag after pesticide wastewater treatment and separation |
-
1999
- 1999-04-15 JP JP11107725A patent/JP2000301166A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001058102A (en) * | 1999-08-23 | 2001-03-06 | Nishihara Environ Sanit Res Corp | Fluidized bed crystallization reactor |
| JP2005007257A (en) * | 2003-06-18 | 2005-01-13 | Ataka Construction & Engineering Co Ltd | Phosphorus recovering apparatus and method for treating phosphorus-containing organic wastewater |
| JP2008073589A (en) * | 2006-09-20 | 2008-04-03 | Japan Organo Co Ltd | Fluorine crystallization technology |
| JP2009119380A (en) * | 2007-11-15 | 2009-06-04 | Japan Organo Co Ltd | Crystallization reactor and crystallization reaction method |
| JP2015142881A (en) * | 2014-01-31 | 2015-08-06 | 昭和環境システム株式会社 | Crystallization device |
| CN108067010A (en) * | 2017-12-22 | 2018-05-25 | 南京工业大学 | Recrystallization device for efficient purification and reuse of salt slag after pesticide wastewater treatment and separation |
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