JP2001276850A - Crystallizing/dephosphorizing method using dephosphorizing agent and its device - Google Patents
Crystallizing/dephosphorizing method using dephosphorizing agent and its deviceInfo
- Publication number
- JP2001276850A JP2001276850A JP2000093267A JP2000093267A JP2001276850A JP 2001276850 A JP2001276850 A JP 2001276850A JP 2000093267 A JP2000093267 A JP 2000093267A JP 2000093267 A JP2000093267 A JP 2000093267A JP 2001276850 A JP2001276850 A JP 2001276850A
- Authority
- JP
- Japan
- Prior art keywords
- calcium
- waste liquid
- dephosphorizing
- phosphorus
- dephosphorization
- 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.)
- Pending
Links
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、リン分を含む廃
液、特に一般家庭用の簡易処理設備または小規模下水処
理施設の処理廃液中のリン分を、珪酸カルシウム水和物
を含む脱リン材を使用して除去する方法およびその装置
に関する。BACKGROUND OF THE INVENTION The present invention relates to a phosphorus removal material containing calcium silicate hydrate, particularly a phosphorus solution in a wastewater containing phosphorus, particularly in a wastewater from a simple household treatment facility or a small-scale sewage treatment facility. The present invention relates to a method and an apparatus for removing the same.
【０００２】[0002]
【従来技術】公共の下水処理設備を有しない地域におい
ては、簡易下水処理設備を用いて廃水を処理している。
また、小規模施設、例えば農業集落、各種食品加工業な
どにおいては、沈殿層、ばっ気処理槽、沈殿槽、消毒槽
より成る廃液処理施設で処理しているのが現状である。2. Description of the Related Art In areas without public sewage treatment facilities, wastewater is treated using simplified sewage treatment facilities.
At present, small-scale facilities, such as agricultural settlements and various food processing industries, treat wastewater in a wastewater treatment facility including a sedimentation layer, an aeration treatment tank, a sedimentation tank, and a disinfection tank.
【０００３】また、本発明者等は、大規模処理施設にお
ける汚泥中に含まれるリン分の回収方法について、特願
平１０−３２１０５１号、発明の名称「汚泥からのリン
分回収方法およびその装置」において、汚泥を嫌気性の
雰囲気で処理して汚泥中のリン分を処理水中に排出さ
せ、この処理水中のカルシウム分を９０〜１６０ｍｇ／
ｌ、ｐＨ値を８〜９に調整した後、珪酸カルシウム水和
物より成る脱リン材で処理して、リン分を回収する方法
とその装置について開示している。In addition, the present inventors have disclosed a method for recovering phosphorus contained in sludge in a large-scale treatment facility, which is disclosed in Japanese Patent Application No. 10-321951, entitled "Method for recovering phosphorus from sludge and its apparatus". ], The sludge is treated in an anaerobic atmosphere to discharge the phosphorus content in the sludge into the treated water, and the calcium content in the treated water is reduced to 90 to 160 mg /
1, discloses a method and apparatus for recovering phosphorus by adjusting the pH value to 8 to 9 and then treating with a dephosphorizing material composed of calcium silicate hydrate.
【０００４】[0004]
【発明が解決しようとしている課題】しかしながら上記
簡易下水処理施設および上記小規模廃液処理施設におい
ては、十分にリン分が除去されていないのが現状であ
る。また、上記特願平１０−３２１０５１号に記載の処
理方法においては、脱リン槽中のカルシウム分の濃度と
ｐＨ値を常時監視して調整する装置と人手が必要があっ
た。また、このような装置を原則として無人で処理する
小規模処理施設に設置することは、人手不足と処理費用
の増大となるので、設置が困難であった。However, in the above-mentioned simple sewage treatment facility and the above-mentioned small-scale waste liquid treatment facility, phosphorus is not sufficiently removed at present. Further, in the processing method described in Japanese Patent Application No. 10-32151, a device and a man who constantly monitor and adjust the concentration and pH value of calcium in the dephosphorization tank were required. In addition, installing such an apparatus in a small-scale processing facility that processes unattended in principle results in a shortage of labor and an increase in processing costs, so that installation has been difficult.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決し、設置
しても人手を要さず、しかも設置費用が廉価な処理方法
および処理装置を開発することを本願は目的とする。請
求項１の発明は、珪酸カルシウム水和物よりなる脱リン
材により廃液中のリン分を除去する晶析脱リン方法であ
って、リン分を除去する上記廃液をカルシウム含有物と
接触させ、該廃液中のカルシウム分を所定の濃度に調整
する工程と、この廃液を上記脱リン材と接触させリン分
を晶析させる工程とを有する脱リン材を使用した晶析脱
リン方法である。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to develop a processing method and a processing apparatus which require less labor to install and have a low installation cost. The invention of claim 1 is a crystallization dephosphorization method for removing phosphorus content in a waste liquid by a phosphorus removal material comprising calcium silicate hydrate, wherein the waste liquid for removing phosphorus content is brought into contact with a calcium-containing substance, A crystallization dephosphorization method using a dephosphorizing material, comprising a step of adjusting the calcium content of the waste liquid to a predetermined concentration and a step of contacting the waste liquid with the dephosphorizing material to crystallize the phosphorus content.
【０００６】請求項２の発明は、上記廃液中のカルシウ
ム分濃度が４０〜１００ｍｇ／ｌである請求項１に記載
の脱リン材を使用した晶析脱リン方法である。A second aspect of the present invention is the crystallization dephosphorization method using the dephosphorization material according to the first aspect, wherein the calcium concentration in the waste liquid is 40 to 100 mg / l.
【０００７】請求項３の発明は、上記脱リン材が珪酸カ
ルシウム水和物に不活性物質を混合したものである請求
項１または請求項２に記載の脱リン材を使用した晶析脱
リン方法である。According to a third aspect of the present invention, the dephosphorizing material is a mixture of calcium silicate hydrate and an inert substance, and the crystallization dephosphorizing method using the dephosphorizing material according to the first or second aspect. Is the way.
【０００８】請求項４の発明は、上記不活性物質が炭酸
カルシウム、セラミックスである請求項３に記載の脱リ
ン材を使用した晶析脱リン方法である。A fourth aspect of the present invention is the crystallization dephosphorization method using a dephosphorization material according to the third aspect, wherein the inert substance is calcium carbonate or ceramic.
【０００９】請求項５の発明は、リン分を含有する処理
施設の廃液を遅効性のカルシウム含有物と接触させる手
段と、この廃液を珪酸カルシウム水和物を含んだ脱リン
材と接触させ、該廃液中のリン分を晶析させる手段とを
備えた脱リン装置である。[0009] The invention of claim 5 is a means for contacting a waste liquid of a treatment facility containing phosphorus with a slow-acting calcium-containing substance, and contacting the waste liquid with a dephosphorizing material containing calcium silicate hydrate. Means for crystallizing phosphorus in the waste liquid.
【００１０】[0010]
【発明の実施の態様】本発明は、下水処理施設より排出
される廃液中のリン分を、珪酸カルシウム水和物を含む
脱リン材と接触させ、上記廃液中のリン分を晶析させて
除去する方法に関するものである。上記リン分と脱リン
材とを接触させ、リン分を晶析させる際、不足するカル
シウム分を補給する手段として、カルシウム含有物、例
えば遅溶性のカルシウム含有物を用いるものである。こ
の際の上記廃液中のカルシウム分濃度を４０〜１００ｍ
ｇ／ｌに調整するものである。上記カルシウム分濃度が
４０ｍｇ／ｌ未満では、カルシウム分濃度が不足し所定
の脱リン効率が得られない。１００ｍｇを越えても脱リ
ン効率にさほど変化は見られなく、上記カルシウム含有
物の溶解速度が大きくなりすぎ、装置の維持上望ましい
とはいえない。BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a phosphorus content in a waste liquid discharged from a sewage treatment plant is brought into contact with a dephosphorizing material containing calcium silicate hydrate to crystallize the phosphorus content in the waste liquid. It relates to the method of removing. When crystallizing the phosphorus content by contacting the phosphorus content with the dephosphorizing material, a calcium-containing material, for example, a slow-soluble calcium-containing material, is used as a means for replenishing the insufficient calcium content. At this time, the calcium concentration in the waste liquid is 40 to 100 m.
g / l. If the calcium concentration is less than 40 mg / l, the calcium concentration is insufficient, and a predetermined dephosphorization efficiency cannot be obtained. Even if it exceeds 100 mg, there is no significant change in the dephosphorization efficiency, and the dissolution rate of the above-mentioned calcium-containing substance becomes too high, which is not desirable for maintaining the apparatus.
【００１１】上記カルシウム分含有物としては、遅溶性
のカルシウム含有物であり、カルシウム分を徐々に、例
えば２０〜８０ｍｇ／ｌ／時程度で溶解するものでよ
く、急激に反応し溶解するもの、水に浸漬した場合、短
期間でその形状が崩壊するものは好ましくない。また、
上記家庭用の簡易処理設備および小規模処理設備におい
ては、４ヶ月程度毎に設備を点検する必要があり、この
点検時期毎に上記カルシウム含有物を点検し、溶解した
上記含有物の補充を行う。従って、この間、上記カルシ
ウム含有物質が固形物としての形状を留めて置けば、通
水抵抗値が変化しないので、全体のシステムの維持上望
ましい。このようなカルシウム含有物質としては、天然
の鉱物、産業廃棄物またはこれらを二次的に加工した造
粒物のいずれでも良い。天然の鉱物、または産業廃棄物
のカルシウム含有物としては、二水石膏、無水石膏、高
炉滓、転炉滓等を例示することが出来る。このうち、無
水石膏を使用することが望ましい。使用する石膏として
は、天然石膏および化学石膏のいずれを用いても良い。
化学石膏の場合は、通常粉体であるので、上記期間内に
粉体化しないように造粒する。また、本発明において
は、脱リン材を充填した脱リン槽のｐＨ値は、リン分の
晶析が可能なアルカリ性雰囲気となり、上記脱リン槽中
のｐＨ値を調整する必要がない。更に、上記脱リン槽内
でリン分を晶析した後のｐＨ値が８．６程度となる。こ
の値は、排水基準値以下であり、処理後の排出水にｐＨ
調整装置を設置する必要がないことが判明した。The above-mentioned calcium-containing substance is a slowly-dissolving calcium-containing substance, which may gradually dissolve calcium at, for example, about 20 to 80 mg / l / hour, may rapidly dissolve and react. When immersed in water, it is not preferable that the shape collapses in a short period of time. Also,
In the above-mentioned household simple processing equipment and small-scale processing equipment, it is necessary to inspect the equipment about every four months. At each time of this inspection, the calcium content is inspected, and the dissolved content is replenished. . Therefore, during this time, if the calcium-containing substance is kept in a solid form, the water flow resistance does not change, which is desirable for maintaining the entire system. Such a calcium-containing substance may be any of natural minerals, industrial wastes, and granules obtained by secondary processing of these. Examples of natural minerals or calcium-containing substances of industrial waste include gypsum dihydrate, anhydrite, blast furnace slag, converter slag, and the like. Of these, it is desirable to use anhydrous gypsum. As the gypsum to be used, either natural gypsum or chemical gypsum may be used.
In the case of chemical gypsum, since it is usually a powder, it is granulated so as not to be powdered within the above period. In the present invention, the pH value of the dephosphorization tank filled with the dephosphorization material is an alkaline atmosphere in which phosphorus can be crystallized, and there is no need to adjust the pH value in the dephosphorization tank. Further, the pH value after crystallization of the phosphorus content in the dephosphorization tank becomes about 8.6. This value is below the wastewater standard value,
It turned out that there was no need to install an adjusting device.
【００１２】本発明に使用する脱リン材としては、珪酸
質原料と石灰質原料とを所定の割合で混合し、この混合
物を高温高圧のオートクレーブ中で反応生成させた珪酸
カルシウム水和物を主構成物とするものである。この
際、上記原料の他に不活性物質を混合する。この不活性
物質は、上記珪酸カルシウム水和物を生成させる際に、
反応にあずからない物質である。このような物質とし
て、例えば、炭酸カルシウム粉、或いは陶磁器、ガラス
等の粉体または固体セラミックスである。これらのうち
炭酸カルシウム粉が好ましく、その混合量は、２０〜５
０％程度である。これらの不活性物質を混合することに
より、脱リン槽中のアルカリ性雰囲気の上昇を抑えるこ
とが可能となり好適である。The dephosphorizing material used in the present invention is mainly composed of calcium silicate hydrate obtained by mixing a siliceous raw material and a calcareous raw material at a predetermined ratio and reacting the mixture in an autoclave at a high temperature and a high pressure. Things. At this time, an inert substance is mixed in addition to the above raw materials. This inert substance, when forming the above calcium silicate hydrate,
It is a substance that does not participate in the reaction. Such a substance is, for example, calcium carbonate powder, powder such as porcelain or glass, or solid ceramics. Of these, calcium carbonate powder is preferred, and the mixing amount is 20 to 5
It is about 0%. By mixing these inert substances, it is possible to suppress an increase in the alkaline atmosphere in the dephosphorization tank, which is preferable.
【００１３】本発明において使用する脱リン装置は、図
５に示すように処理する廃液を上記カルシウム補給源を
充填した充填槽を通過させ、廃液中のカルシウム分濃度
が４０〜１００ｍｇ／ｌになるようにカルシウム補給源
の充填量、補給材の表面積、通過速度などを調整する。
この調整液を上記脱リン材を充填した脱リン槽中を通過
させ、廃液中のリン分をヒドロキシアパタイトの結晶と
して脱リン材表面に晶析させる。なお、脱リン材は充填
層である必要はなく、流動層であっても良い。また、上
記カルシウム補充源を充填した充填層を脱リン槽中に設
ければ装置が簡素化されるので好ましい。In the dephosphorization apparatus used in the present invention, as shown in FIG. 5, the waste liquid to be treated is passed through a filling tank filled with the above-mentioned calcium supply source, and the calcium concentration in the waste liquid becomes 40 to 100 mg / l. Thus, the filling amount of the calcium supplement source, the surface area of the supplement material, the passing speed, etc. are adjusted.
This adjusted solution is passed through a dephosphorization tank filled with the above-mentioned dephosphorization material, and the phosphorus content in the waste liquid is crystallized as hydroxyapatite crystals on the surface of the dephosphorization material. In addition, the phosphorus removal material does not need to be a packed bed, and may be a fluidized bed. Further, it is preferable to provide a packed bed filled with the calcium replenishment source in a dephosphorization tank because the apparatus is simplified.
【００１４】[0014]
【実施例】三菱マテリアル株式会社製のトバモライトを
主構成物とする珪酸カルシウム水和物に炭酸カルシウム
粉末を２５重量％と５０重量％混合した粒径１．７〜
２．４ｍｍの脱リン材を図５に示す脱リン槽（φ２５ｍ
ｍ×４００ｍｍ）に脱リン材容積１００ｍｌとなるよう
に充填した。また、メキシコ産の硬石膏を平均粒径５ｍ
ｍに粉砕した物と、二水石膏を平均粒径５ｍｍに造粒し
たものとを充填槽（φ２５ｍｍ×１５０ｍｍ）に容積１
０〜４０ｍｌとなるように充填した。リン分濃度５ｍｇ
／ｌ（ＰＯ４ーＰ）に調整した廃液を表１に示すよう
に、まず、上記充填槽を通さない条件で１００〜２００
ｍｌ／ｈ（空塔速度１〜２／時）で通水し、続いて充填
槽を使用した条件で１００〜５０ｍｌ／ｈで通水した。
脱リン槽出口のリン分濃度（ＰＯ４ーＰ）とｐＨ値およ
びカルシウムイオン濃度、並びに脱リン槽入口のカルシ
ウムイオン濃度を測定した。その結果は、図１〜図４に
示す通りである。EXAMPLE A mixture of calcium silicate hydrate mainly composed of tobermorite manufactured by Mitsubishi Materials Corporation and calcium carbonate powder at 25% by weight and 50% by weight was mixed.
A dephosphorization material of 2.4 mm was used in a dephosphorization tank (φ25 m
(m × 400 mm) so as to have a dephosphorization material volume of 100 ml. In addition, anhydrite from Mexico is average particle size 5m
m and gypsum dihydrate to an average particle size of 5 mm were placed in a filling tank (φ25 mm × 150 mm) in a volume of 1
It was filled to be 0 to 40 ml. Phosphorus concentration 5mg
/ L were adjusted waste liquid (PO 4 over P) as shown in Table 1, firstly, 100-200 under conditions impervious the filling tank
Water was passed at a flow rate of 100 ml / h (superficial tower speed: 1 to 2 / hour), and subsequently, water was passed at a flow rate of 100 to 50 ml / h under the condition using a filling tank.
Phosphorus concentration (PO 4 over P) and pH values and the calcium ion concentration in the dephosphorization tank outlet, and a calcium ion concentration of dephosphorization tank inlet was measured. The results are as shown in FIGS.
【００１５】[0015]
【表１】 [Table 1]
【００１６】即ち、表１に記載の通りカルシウム分含有
物質を通さない予備試験では、図３に示すとおり、カル
シウムイオン濃度が４０ｍｇ／ｌ程度のとき、図１に示
すＰＯ４−Ｐ濃度が高くなり処理が不良となっている。
その後の実施例では、いずれもカルシウム分含有物質と
接触させることで、図１に示すように脱リン槽出口のＰ
Ｏ４−Ｐ濃度を低く維持できることが可能である。以上
の結果より、小規模処理場などで排出される処理済み水
のリン分濃度は、通常２〜５ｍｇ／ｌ程度と言われてお
り、この処理済み水のリン分濃度を５０％以上削減する
ことが可能である。That is, as shown in Table 1, in a preliminary test in which a calcium-containing substance was not passed as shown in Table 1, when the calcium ion concentration was about 40 mg / l, the PO 4 -P concentration shown in FIG. The processing is defective.
In the subsequent examples, as shown in FIG.
It is possible to keep the O 4 -P concentration low. From the above results, it is said that the concentration of phosphorus in the treated water discharged from small-scale treatment plants is usually about 2 to 5 mg / l, and the concentration of phosphorus in the treated water is reduced by 50% or more. It is possible.
【００１７】[0017]
【発明の効果】本発明は、炭酸カルシウムなどの不活性
物質を混合した珪酸カルシウム水和物よりなる脱リン材
を使用することにより、処理前後の廃液のｐＨ値を調整
する必要がなくなった。また、遅溶性のカルシウム含有
物を使用したため、処理する廃液のカルシウムイオン濃
度を常時監視する必要がなくなった。この結果、大規模
な廃水処理装置が設置不能な山間部の簡易処理施設、集
合処理施設または小規模な廃水処理場より排出される処
理済み廃液（二次処理水）中のリン分除去に適用可能な
脱リン方法とその装置を提供することが可能となった。
また、大中規模の廃水処理場などにおいても、本装置を
追加設置する場合、設置場所をとらず、しかも人手を要
さないので、イニシャルコスト及びランニングコストも
廉価となる。According to the present invention, there is no need to adjust the pH value of the waste liquid before and after the treatment by using a dephosphorizing material composed of calcium silicate hydrate mixed with an inert substance such as calcium carbonate. Further, since a slow-soluble calcium-containing substance is used, it is no longer necessary to constantly monitor the calcium ion concentration of the waste liquid to be treated. As a result, it can be applied to the removal of phosphorus from treated wastewater (secondary treated water) discharged from simple treatment facilities, collective treatment facilities or small wastewater treatment plants in mountainous areas where large-scale wastewater treatment equipment cannot be installed. It has become possible to provide a possible dephosphorization method and its device.
In addition, even in a large- to medium-sized wastewater treatment plant, when this device is additionally installed, the installation cost is reduced and the initial cost and running cost are low because the installation space is not required and no man is required.
【図１】脱リン槽出口のリン分濃度の経時変化を示すグ
ラフである。FIG. 1 is a graph showing the change over time in the phosphorus concentration at the outlet of a dephosphorization tank.
【図２】脱リン槽出口のｐＨ値の経時変化を示すグラフ
である。FIG. 2 is a graph showing a change over time of a pH value at an outlet of a dephosphorization tank.
【図３】脱リン槽出口のカルシウムイオン濃度の推移を
示すグラフである。FIG. 3 is a graph showing changes in calcium ion concentration at the outlet of a dephosphorization tank.
【図４】脱リン槽入口のカルシウムイオン濃度の推移を
示すグラフである。FIG. 4 is a graph showing changes in calcium ion concentration at the inlet of a dephosphorization tank.
【図５】本発明の脱リン装置の一例を示すブロック図で
ある。FIG. 5 is a block diagram showing an example of the phosphorus removal device of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松本 忠司 埼玉県大宮市北袋町１−297 三菱マテリ アル株式会社セメント研究所内 Ｆターム(参考） 4D038 AA08 AB45 AB50 AB52 AB53 AB54 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadashi Matsumoto 1-297 Kitabukuro-cho, Omiya-shi, Saitama F-term in Cement Research Institute, Mitsubishi Materials Corporation 4D038 AA08 AB45 AB50 AB52 AB53 AB54
Claims (5)
により廃液中のリン分を除去する晶析脱リン方法であっ
て、 リン分を除去する上記廃液をカルシウム含有物と接触さ
せ、該廃液中のカルシウム分を所定の濃度に調整する工
程と、 この廃液を上記脱リン材と接触させリン分を晶析させる
工程とを有する脱リン材を使用した晶析脱リン方法。1. A crystallization dephosphorization method for removing a phosphorus component in a waste liquid by a dephosphorizing material comprising calcium silicate hydrate, wherein the waste liquid for removing a phosphorus component is brought into contact with a calcium-containing substance, and the waste liquid is removed. A crystallization dephosphorization method using a dephosphorizing material, comprising: a step of adjusting a calcium content in the solution to a predetermined concentration; and a step of contacting the waste liquid with the dephosphorizing material to crystallize the phosphorus content.
１００ｍｇ／ｌである請求項１に記載の脱リン材を使用
した晶析脱リン方法。2. The calcium concentration in the waste liquid is 40 to
A crystallization dephosphorization method using the dephosphorization material according to claim 1, which is 100 mg / l.
不活性物質を混合したものである請求項１または請求項
２に記載の脱リン材を使用した晶析脱リン方法。3. The crystallization dephosphorization method using a dephosphorizing material according to claim 1, wherein the dephosphorizing material is a mixture of calcium silicate hydrate and an inert substance.
ミックスである請求項３に記載の脱リン材を使用した晶
析脱リン方法。4. The method according to claim 3, wherein the inert substance is calcium carbonate or ceramics.
シウム含有物と接触させる手段と、 この廃液を珪酸カルシウム水和物を含んだ脱リン材と接
触させ、該廃液中のリン分を晶析させる手段とを備えた
晶析脱リン装置。5. A means for contacting a waste liquid from a treatment facility containing phosphorus with a calcium-containing substance, and contacting the waste liquid with a dephosphorizing material containing calcium silicate hydrate to crystallize the phosphorus content in the waste liquid. A crystallization dephosphorization apparatus comprising means for precipitating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000093267A JP2001276850A (en) | 2000-03-30 | 2000-03-30 | Crystallizing/dephosphorizing method using dephosphorizing agent and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000093267A JP2001276850A (en) | 2000-03-30 | 2000-03-30 | Crystallizing/dephosphorizing method using dephosphorizing agent and its device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001276850A true JP2001276850A (en) | 2001-10-09 |
Family
ID=18608477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000093267A Pending JP2001276850A (en) | 2000-03-30 | 2000-03-30 | Crystallizing/dephosphorizing method using dephosphorizing agent and its device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001276850A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101899909B1 (en) * | 2017-03-02 | 2018-09-18 | 한국건설기술연구원 | Phosphorus crystallization-filtration removal and recovery system, and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58166981A (en) * | 1982-03-29 | 1983-10-03 | Kurita Water Ind Ltd | Artificial dephosphorizing material and dephosphorizing method |
| JPS59156488A (en) * | 1983-02-26 | 1984-09-05 | Kurita Water Ind Ltd | Artificial dephosphorizing agent and dephosphorization |
| JPS61204087A (en) * | 1985-03-08 | 1986-09-10 | Ataka Kogyo Kk | Crystallizing agent for phosphate ion in waste water and its preparation |
| JPH1034167A (en) * | 1996-05-21 | 1998-02-10 | Mitsubishi Materials Corp | Dephosphorization of phosphorus-containing water |
-
2000
- 2000-03-30 JP JP2000093267A patent/JP2001276850A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58166981A (en) * | 1982-03-29 | 1983-10-03 | Kurita Water Ind Ltd | Artificial dephosphorizing material and dephosphorizing method |
| JPS59156488A (en) * | 1983-02-26 | 1984-09-05 | Kurita Water Ind Ltd | Artificial dephosphorizing agent and dephosphorization |
| JPS61204087A (en) * | 1985-03-08 | 1986-09-10 | Ataka Kogyo Kk | Crystallizing agent for phosphate ion in waste water and its preparation |
| JPH1034167A (en) * | 1996-05-21 | 1998-02-10 | Mitsubishi Materials Corp | Dephosphorization of phosphorus-containing water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101899909B1 (en) * | 2017-03-02 | 2018-09-18 | 한국건설기술연구원 | Phosphorus crystallization-filtration removal and recovery system, and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106630084B (en) | Method and system for treating high-fluorine and high-hardness wastewater by two-stage two-phase fluidized bed self-crystallization | |
| US5895576A (en) | Method and apparatus for wastewater treatment by chemical reaction of reactive filler and propagated microorganisms | |
| Joko | Phosphorus removal from wastewater by the crystallization method | |
| US4917802A (en) | Method for treating waste water | |
| KR100640698B1 (en) | Method for recovering phosphate from sludge and system therefor | |
| JP2007283223A (en) | Method for recovering phosphorus from sludge | |
| JP2006341226A (en) | Method for removing phosphorus from water | |
| JP2005246249A (en) | Method for recovering phosphorus and its apparatus | |
| KR101294490B1 (en) | Treatment agent and process for production thereof, and treatment method | |
| US8013204B2 (en) | Use of partly prehydrated lime for separating a solid matter/liquid mixture, method for treating sludge and purified sludge obtained by said method | |
| JPH0712477B2 (en) | How to remove phosphorus in water | |
| JP2001276850A (en) | Crystallizing/dephosphorizing method using dephosphorizing agent and its device | |
| JPH07115979B2 (en) | Manufacturing method of sludge fertilizer | |
| JPH0256955B2 (en) | ||
| JPS6317513B2 (en) | ||
| JP2002248498A (en) | Excess sludge treatment method | |
| JP2003305481A (en) | Crystallization dephosphorization method and crystallization dephosphorization apparatus | |
| JP3846562B2 (en) | Organic wastewater treatment method | |
| JP2004089931A (en) | Dephosphorization and ammonia-removal method, manufacturing method for ammonia fertilizer and manufacturing method for molten solidified matter | |
| JPH0683832B2 (en) | Microorganism carrier | |
| JPS648598B2 (en) | ||
| CN219971985U (en) | Wastewater treatment device | |
| JPS58223481A (en) | Method for controlling ph of tap water | |
| JP2004174386A (en) | Treatment method for phosphoric acid-containing wastewater | |
| JPH10309585A (en) | Water quality purifying method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20070329 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20091221 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100115 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20100525 |