JPH0128628B2 - - Google Patents
Info
- Publication number
- JPH0128628B2 JPH0128628B2 JP59274327A JP27432784A JPH0128628B2 JP H0128628 B2 JPH0128628 B2 JP H0128628B2 JP 59274327 A JP59274327 A JP 59274327A JP 27432784 A JP27432784 A JP 27432784A JP H0128628 B2 JPH0128628 B2 JP H0128628B2
- Authority
- JP
- Japan
- Prior art keywords
- wastewater
- transfer pipe
- acid
- phosphorus
- pipe
- 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
Links
- 239000000463 material Substances 0.000 claims description 38
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 21
- 239000002351 wastewater Substances 0.000 claims description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 15
- 239000011574 phosphorus Substances 0.000 claims description 15
- 229910052698 phosphorus Inorganic materials 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 230000008929 regeneration Effects 0.000 description 9
- 238000011069 regeneration method Methods 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 239000010865 sewage Substances 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 150000007524 organic acids Chemical class 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 239000002367 phosphate rock Substances 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000006114 decarboxylation reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
〔産業上の利用分野〕
本発明は、下水、し尿処理水或いは工場廃水等
の汚水中に含まるSS及びリンを除去する方法に
関する。
〔従来の技術及びその問題点〕
近年、閉鎖水域の富栄養化の進行に伴ない、こ
れら水域に流入する汚水中のSS及びリンを除去
する方法に関する研究が各所で行われている。
リンを含む汚水をリン鉱石や骨炭などの材
（脱リン剤）と接触させて処理する方法は、接触
脱リン法として当業者においてはよく知られてお
り、この方法は汚泥の発生がないので有望な方法
として期待されている。
しかしながら、この方法においては長期間通水
を継続していると、脱リン材（材）がCaCO3
や有機物により汚染され、しばしば処理水質が悪
化して来ることがあつた。このような欠点を除く
ため、汚水を脱炭酸工程に導き、汚水から炭酸物
質を除去した後カルシウム剤及び／又はアルカリ
剤を添加し、ついで砂過槽に通液して汚水中の
SSを除去した後さらに脱リン材を充填した脱リ
ン槽へ通液する方法がとられていた。しかし、こ
の方法は工程が複雑となるばかりでなく、脱炭酸
に要する多量の酸が必要であるという欠点を有し
ている。
一方、汚水中のSSを除去する方法として、
材の一部を常時循環再生しながら処理する移動床
過方法も公知であるが、この方法ではリンの除
去ができず、またSSに汚染された材の再生を
十分に行い難く、したがつて材の移送が部分的
にできなくなり目詰りを生ずる欠点もあつた。
〔発明の構成〕
本発明は、汚水にカルシウム剤及び／又はアル
カリ剤を加えた後リン除去能力を有する材と接
触せしめて汚水中のSS及びリンを除去する方法
において、反応槽の底部から上部に設けられた移
送管の底部に空気を吹込むことにより、移動床を
形成している材層の下部より材の一部を移送
管内に抜き出すと同時に、移送管の下部に酸又は
アルカリを添加して該材を再生しつゝ移送管内
を流過させて材層の上部に移送することを特徴
とする汚水中のSS及びリンを除去する方法であ
つて、本発明者は前記の従来の技術の問題点を解
決するため検討を重ねた結果なされたもので、接
触脱リン法と移動床過法を有機的に結合し、液
中のSS及びリンを効率的に除去する方法に関す
るものである。
つぎに本発明の実施態様を第１図に基いて説明
する。
第１図において、符号１は汚水導入管、２はカ
ルシウム剤及び／又はアルカリ剤導入管、３は管
内混合器、４は反応槽、５は分配率、６は脱リン
材層、７は空気吹込管、８は酸（又はアルカリ）
導入管、９は移送管、１０は空気逃し筒、１１は
再生槽、１２は分配傘、１３は洗浄水排出管、１
４は処理水排出管、１５は洗浄水ぜきを示す。
汚水導入管１を通して供給される汚水中に、カ
ルシウム剤及び／又はアルカリ剤導入管２よりカ
ルシウム剤及び／又はアルカリ剤を注入し、管内
混合器３中で混合した後脱リン材を充填した反応
槽４に導入する。反応槽に導入された汚水は、分
配傘５で分配され脱リン材層を上向きに流れリン
及びSSが除去された後処理水排出管１３から排
出される。一方、移送管９の下部に空気を吹き込
むことにより脱リン材の一部は移送管内を上向き
に移送される。また移送管の下部に酸導入管８よ
り酸を注入することにより酸は空気により混合さ
れる。そして、反応槽４の下部から移送管９中に
導入された脱リン材上に付着している汚染物質は
空気と水の撹拌作用により剥離されるとともに、
汚染物質として付着している炭酸カルシウムは酸
により溶解され、生成した炭酸分は空気により脱
気されながら移送管中を再生されつゝある脱リン
材とともに上向きに移送される。上向きに移送
された脱リン材は、上部再生槽１１中に排出さ
れ、該再生槽中で、再生槽の下部より流入する処
理水により洗浄され、処理水と向流で分配傘１２
上で分配されながら脱リン材層上に返送される。
再生槽中で分離された空気及び脱気されたガス成
分は空気逃し筒１０より系外に排出され、また洗
浄水は洗浄水ぜき１５を通り洗浄水排出管１３よ
り排出される。一方処理水は処理水排出管１４よ
り系外に排出される。
第２図は、脱リン材を反応槽外に設けた移送管
により移送しながら再生する装置の例を示すもの
で、符号は第１図に関し記載した符号と同じ意味
を有する。なお、第２図に示す例においては、脱
リン材から分離された空気等は、再生槽１１の
上部から系外に排出されるものである。
また、脱リン材の再生及び洗浄を効率良く行う
ために再生槽１１内に撹拌機を設けてもよい。ま
た脱リン材の有機汚染がひどい場合には、酸導入
管８より有機酸を注入してもよいが、このような
場合、アルカリ又は有機溶媒を注入するためその
導入管を移送管９上に設けてもよい。
脱リン材としては、リン鉱石、骨炭、軽炉スラ
グ、軽焼マグネシア等を使用でき、材（脱リン
材）の粒径としては0.3mm〜2.0mm程度のものが好
ましい。
流入汚水に混合するカルシウム剤としては、石
膏、塩化カルシウム及び／又は消石灰を、アルカ
リ剤としては消石石灰、苛性ソーダ及び／又は水
酸化マグネシウムを使用できる。
脱リン剤が炭酸カルシウムにより、主として汚
染されている場合には、再生剤として塩酸、硫
酸、有機酸等の酸を用いるのが好ましく、また有
機物により汚染されている場合には、再生剤とし
て有機酸、アルカリ或いは有機溶媒を使用するの
が好ましい。
移送管９の下部に吹き込む空気は、移送管の高
さにもよるが、0.5〜２Kg／cm3程度の加圧空気を、
処理水量の0.1〜５倍程度の量で吹き込めばよく、
再生塔１１への洗浄用処理水量は、全処理水量の
５〜15％程度の量となるようにすればよい。
移送管中に注入する酸の量は、移送管内の液が
pH3〜６になる程度、アルカリの量は移送管内の
pHが10〜12になる程度の量で加えるとよい。
実施例 １
塔高2500mm、内径380mmの第１図に示す如き装
置に、0.5〜0.8mmのリン鉱石を800mmの厚さに充
填し、pH8.5〜9.0、Ca含有量60〜80mg／に調
整した下水二次処理水を12m3／日の割合で通水し
た。
槽内に19mmφのエアリフト管を設け、空気を
1.5／分（揚砂量60／時）の割合で吹き込ん
だ。また同時にエアリフト管内に１％の塩酸を注
入し、エアリフト管の上部に設けた再生塔（容量
１）内のpHが4.5になるようにした。
処理結果を表−１に示す。なお、比較例として
塩酸の注入を行わなかつた場合の結果も表−１に
示す。
なお、下水二次処理水の水質は、リン含有量１
〜２mg／、Ｍ−アルカリ度100mg／、SS5〜
７mg／、pH6.5〜7.0であつた。
[Industrial Application Field] The present invention relates to a method for removing SS and phosphorus contained in wastewater such as sewage, human waste water, or industrial wastewater. [Prior art and its problems] In recent years, with the progress of eutrophication of closed water bodies, research on methods for removing SS and phosphorus from wastewater flowing into these water bodies has been conducted in various places. The method of treating sewage containing phosphorus by bringing it into contact with a material (dephosphorization agent) such as phosphate rock or bone charcoal is well known to those skilled in the art as the catalytic dephosphorization method, and this method does not generate sludge. This is expected to be a promising method. However, in this method, if water continues to flow for a long period of time, the dephosphorizing material (material) will become CaCO 3
The quality of the treated water often deteriorated due to contamination with organic matter. In order to eliminate these drawbacks, wastewater is led to a decarboxylation process, and after removing carbonated substances from the wastewater, a calcium agent and/or an alkaline agent is added, and then the liquid is passed through a sand filter tank to remove carbonic substances from the wastewater.
After removing the SS, the method used was to pass the liquid through a dephosphorization tank filled with a dephosphorization material. However, this method has the disadvantage that not only the process is complicated, but also a large amount of acid is required for decarboxylation. On the other hand, as a method to remove SS from wastewater,
A moving bed filtration method is also known, in which a part of the material is constantly recycled and recycled, but this method cannot remove phosphorus and is difficult to sufficiently regenerate material contaminated with SS. Another disadvantage was that the material could not be transported in some areas, resulting in clogging. [Structure of the Invention] The present invention provides a method for removing SS and phosphorus from wastewater by adding a calcium agent and/or an alkaline agent to wastewater and then contacting the wastewater with a material having a phosphorus removal ability. By blowing air into the bottom of the transfer pipe installed in the pipe, a part of the material is extracted from the bottom of the material layer forming the moving bed into the transfer pipe, and at the same time, acid or alkali is added to the bottom of the transfer pipe. The present inventor has proposed a method for removing SS and phosphorus from wastewater, which is characterized by regenerating the material and transferring it to the upper part of the material layer by passing it through a transfer pipe. This was developed as a result of repeated studies to solve technical problems, and it relates to a method that organically combines catalytic dephosphorization method and moving bed filtration method to efficiently remove SS and phosphorus from liquid. be. Next, an embodiment of the present invention will be explained based on FIG. In Fig. 1, numeral 1 is a wastewater introduction pipe, 2 is a calcium agent and/or alkali agent introduction pipe, 3 is an in-pipe mixer, 4 is a reaction tank, 5 is a distribution ratio, 6 is a dephosphorization material layer, and 7 is air. Blowing pipe, 8 is acid (or alkali)
1 is an introduction pipe, 9 is a transfer pipe, 10 is an air release pipe, 11 is a regeneration tank, 12 is a distribution umbrella, 13 is a wash water discharge pipe, 1
4 is a treated water discharge pipe, and 15 is a washing water spout. A reaction in which a calcium agent and/or alkali agent is injected into wastewater supplied through a sewage inlet tube 1 through a calcium agent and/or alkali agent inlet tube 2, mixed in an internal mixer 3, and then filled with a dephosphorizing material. Introduce into tank 4. The wastewater introduced into the reaction tank is distributed by the distribution umbrella 5, flows upward through the dephosphorization material layer, and is discharged from the post-treated water discharge pipe 13 from which phosphorus and SS have been removed. On the other hand, by blowing air into the lower part of the transfer pipe 9, a portion of the dephosphorizing material is transferred upward within the transfer pipe. Further, by injecting acid into the lower part of the transfer pipe from the acid introduction pipe 8, the acid is mixed with air. Then, contaminants adhering to the dephosphorizing material introduced into the transfer pipe 9 from the lower part of the reaction tank 4 are removed by the stirring action of air and water, and
Calcium carbonate adhering as a contaminant is dissolved by acid, and the produced carbonate is degassed by air and transported upward through the transfer pipe together with the dephosphorizing material that is being regenerated. The dephosphorizing material transferred upward is discharged into the upper regeneration tank 11, where it is washed by treated water flowing from the lower part of the regeneration tank, and is passed through the distribution umbrella 12 in a countercurrent flow to the treated water.
While being distributed on the top, it is returned onto the dephosphorizing material layer.
The air separated in the regeneration tank and the degassed gas components are discharged to the outside of the system through the air relief tube 10, and the wash water passes through the wash water girder 15 and is discharged from the wash water discharge pipe 13. On the other hand, the treated water is discharged from the system through the treated water discharge pipe 14. FIG. 2 shows an example of an apparatus for regenerating the dephosphorizing material while being transferred through a transfer pipe provided outside the reaction tank, and the symbols have the same meanings as those described in connection with FIG. 1. In the example shown in FIG. 2, air and the like separated from the dephosphorizing material are discharged from the upper part of the regeneration tank 11 to the outside of the system. Further, a stirrer may be provided in the regeneration tank 11 in order to efficiently regenerate and wash the dephosphorizing material. In addition, if the dephosphorization material is severely contaminated with organic acids, organic acid may be injected from the acid introduction tube 8, but in such a case, the introduction tube should be connected to the transfer tube 9 in order to inject an alkali or organic solvent. It may be provided. As the dephosphorizing material, phosphate rock, bone coal, light furnace slag, light burnt magnesia, etc. can be used, and the particle size of the material (dephosphorizing material) is preferably about 0.3 mm to 2.0 mm. Gypsum, calcium chloride and/or slaked lime can be used as the calcium agent to be mixed with the inflowing wastewater, and slaked lime, caustic soda and/or magnesium hydroxide can be used as the alkaline agent. When the dephosphorizing agent is mainly contaminated with calcium carbonate, it is preferable to use an acid such as hydrochloric acid, sulfuric acid, or an organic acid as the regenerating agent.If the dephosphorizing agent is contaminated with organic substances, it is preferable to use an acid such as hydrochloric acid, sulfuric acid, or an organic acid as the regenerating agent. Preference is given to using acid, alkali or organic solvents. The air blown into the lower part of the transfer pipe 9 is pressurized air of about 0.5 to 2 kg/ cm3 , depending on the height of the transfer pipe.
It is sufficient to blow in an amount of 0.1 to 5 times the amount of treated water.
The amount of treated water for cleaning to be fed to the regeneration tower 11 may be about 5 to 15% of the total amount of treated water. The amount of acid injected into the transfer tube depends on the liquid in the transfer tube.
The amount of alkali in the transfer pipe is such that the pH is between 3 and 6.
It is best to add it in an amount that will bring the pH to 10-12. Example 1 A device as shown in Fig. 1 with a column height of 2500 mm and an inner diameter of 380 mm was filled with 0.5 to 0.8 mm phosphate rock to a thickness of 800 mm, and the pH was adjusted to 8.5 to 9.0 and the Ca content to be 60 to 80 mg. The secondary treated sewage water was passed through at a rate of 12 m 3 /day. A 19mmφ air lift pipe is installed inside the tank to supply air.
It was blown at a rate of 1.5/min (sand pumping rate: 60/hour). At the same time, 1% hydrochloric acid was injected into the air lift tube to adjust the pH in the regeneration tower (capacity 1) installed at the top of the air lift tube to 4.5. The treatment results are shown in Table-1. As a comparative example, Table 1 also shows the results obtained when hydrochloric acid was not injected. In addition, the water quality of the secondary sewage treatment water has a phosphorus content of 1
~2mg/, M-Alkalinity 100mg/, SS5~
7 mg/, pH 6.5-7.0.
【表】
表−１に示されるように、本発明方法によれば
長期間にわたつて処理水のリン濃度を安定して低
レベルに維持できるが、比較例においては処理水
の水質が徐々に悪化した。また、比較例において
は６か月経過した時点から脱リン材層の一部が固
まり、過抵抗の上昇がみられた。
実施例 ２
実施例１で用いたのと同じ装置を用いて有機性
排水の処理を行つた。エアリフト管内には10％の
NaOHを注入し、pHが10〜11になるように添加
量を調節した。一方、比較例としてNaOHを注
入しないで試験を行つた。
結果を表−２に示す。[Table] As shown in Table 1, according to the method of the present invention, the phosphorus concentration in the treated water can be stably maintained at a low level over a long period of time, but in the comparative example, the quality of the treated water gradually deteriorated. It got worse. Furthermore, in the comparative example, a portion of the dephosphorizing material layer solidified after 6 months, and an increase in overresistance was observed. Example 2 The same equipment used in Example 1 was used to treat organic wastewater. 10% inside the air lift tube
NaOH was injected and the amount added was adjusted so that the pH was 10-11. On the other hand, as a comparative example, a test was conducted without injecting NaOH. The results are shown in Table-2.
本発明によれば、常時脱リン材を再生できるの
で、脱リン材の汚染がなく、従つて一つの反応槽
で長期間安定して効率的にSS及びリンを除去す
ることができる。
According to the present invention, since the dephosphorization material can be constantly regenerated, there is no contamination of the dephosphorization material, and therefore SS and phosphorus can be removed stably and efficiently for a long period of time in one reaction tank.
第１図及び第２図は、本発明方法を説明するた
めの概略フロー図を示す。
１……汚水導入管、２……カルシウム剤及び／
又はアルカリ剤導入管、３……管内混合器、４…
…反応槽、５……分配傘、６……脱リン材層、７
……空気吹込管、８……酸又はアルカリ導入管、
９……移送管、１０……空気逃し筒、１１……再
生槽、１２……分配傘、１３……洗浄水排出管、
１４……処理水排出管、１５……洗浄水ぜき。
1 and 2 show schematic flow diagrams for explaining the method of the invention. 1...Sewage introduction pipe, 2...Calcium agent and/or
Or alkaline agent introduction pipe, 3... In-tube mixer, 4...
... Reaction tank, 5 ... Distribution umbrella, 6 ... Dephosphorization material layer, 7
...Air blowing pipe, 8...Acid or alkali introduction pipe,
9...Transfer pipe, 10...Air release tube, 11...Regeneration tank, 12...Distribution umbrella, 13...Washing water discharge pipe,
14...Treatment water discharge pipe, 15...Washing water spout.
Claims (1)
加えた後リン除去能力を有する材と接触せしめ
て汚水中のSS及びリンを除去する方法において、
反応槽の底部から上部に設けられた移送管の底部
に空気を吹込むことにより、移動床を形成してい
る材層の下部より材の一部を移送管内に抜き
出すと同時に、移送管の下部に酸又はアルカリを
添加して該材を再生しつゝ移送管内を流過させ
て、材層の上部に移送することを特徴とする汚
水中のSS及びリンを除去する方法。1. A method for removing SS and phosphorus from wastewater by adding a calcium agent and/or an alkaline agent to wastewater and then contacting the wastewater with a material having phosphorus removal ability,
By blowing air from the bottom of the reaction tank to the bottom of the transfer pipe installed at the top, a part of the material is extracted from the bottom of the material layer forming the moving bed into the transfer pipe, and at the same time, the bottom of the transfer pipe is A method for removing SS and phosphorus from wastewater, which comprises adding an acid or an alkali to the material to regenerate the material, and flowing the material through a transfer pipe to transfer it to the upper part of the material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27432784A JPS61157391A (en) | 1984-12-28 | 1984-12-28 | Removal of ss and phosphorus in sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27432784A JPS61157391A (en) | 1984-12-28 | 1984-12-28 | Removal of ss and phosphorus in sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61157391A JPS61157391A (en) | 1986-07-17 |
| JPH0128628B2 true JPH0128628B2 (en) | 1989-06-05 |
Family
ID=17540108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27432784A Granted JPS61157391A (en) | 1984-12-28 | 1984-12-28 | Removal of ss and phosphorus in sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61157391A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002307078A (en) * | 2001-04-17 | 2002-10-22 | Kurita Water Ind Ltd | Crystallization dephosphorization equipment |
| JP4628013B2 (en) * | 2004-04-20 | 2011-02-09 | ミヤマ株式会社 | Fluorine-containing water treatment apparatus and treatment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS607992A (en) * | 1983-06-29 | 1985-01-16 | Kurita Water Ind Ltd | Fluidized bed type dephosphorization apparatus |
-
1984
- 1984-12-28 JP JP27432784A patent/JPS61157391A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS607992A (en) * | 1983-06-29 | 1985-01-16 | Kurita Water Ind Ltd | Fluidized bed type dephosphorization apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61157391A (en) | 1986-07-17 |
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