JP2553470B2 - Simple bacterial oxidizer for wastewater containing ferrous sulfate - Google Patents
Simple bacterial oxidizer for wastewater containing ferrous sulfateInfo
- Publication number
- JP2553470B2 JP2553470B2 JP62157131A JP15713187A JP2553470B2 JP 2553470 B2 JP2553470 B2 JP 2553470B2 JP 62157131 A JP62157131 A JP 62157131A JP 15713187 A JP15713187 A JP 15713187A JP 2553470 B2 JP2553470 B2 JP 2553470B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- oxidizing
- ferrous sulfate
- tower
- iron
- 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
- 239000002351 wastewater Substances 0.000 title claims description 24
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 title claims description 9
- 235000003891 ferrous sulphate Nutrition 0.000 title claims description 8
- 239000011790 ferrous sulphate Substances 0.000 title claims description 8
- 229910000359 iron(II) sulfate Inorganic materials 0.000 title claims description 8
- 230000001580 bacterial effect Effects 0.000 title claims description 7
- 239000007800 oxidant agent Substances 0.000 title claims 2
- 238000007254 oxidation reaction Methods 0.000 claims description 19
- 230000003647 oxidation Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 241000894006 Bacteria Species 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 9
- 238000009408 flooring Methods 0.000 claims description 5
- 238000005474 detonation Methods 0.000 claims description 4
- 238000005273 aeration Methods 0.000 description 20
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229910001448 ferrous ion Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- -1 iron ion Chemical class 0.000 description 1
- 229910000358 iron sulfate Inorganic materials 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は鉱山廃水や工場廃水のように、硫酸第１鉄
を含有する廃水の処理、並びに該廃水に含まれる鉄、そ
の他の金属資源の利用を目的とした硫酸第１鉄のバクテ
リア酸化手段に関し、特に廃水発生箇所と処理施設との
間に落差があるか、若しくは廃水発生箇所から処理施設
の間にポンプ流送を行っており、且つ落差を利用して廃
水の自然流送が行えるような地形条件を満たしている場
合に、曝気のための送風設備、並びにバクテリア担体の
回収設備を不要にし、保守点検並びに動力費の大幅な節
減を計り得るようにしたものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the treatment of wastewater containing ferrous sulfate, such as mining wastewater and industrial wastewater, and the treatment of iron and other metal resources contained in the wastewater. Regarding the ferric sulfate bacterial oxidization means for the purpose of use, in particular, there is a drop between the wastewater generation point and the treatment facility, or pumping is performed between the wastewater generation point and the treatment facility, and When topographical conditions that allow natural flow of wastewater using the head are met, there is no need for aeration equipment for aeration and collection equipment for bacterial carriers, which greatly reduces maintenance and power costs. It is something that can be measured.
従来、硫酸第１鉄のバクテリア酸化は、硫酸第１鉄溶
液に対し、塩基性硫酸鉄や珪藻土等の微粒子に鉄酸化バ
クテリアを吸着・濃縮してなる担体を加えて酸化槽に供
給した上、空気を吹込んで曝気することにより、酸素の
供給とバクテリア担体の流動を行いつつ第１鉄イオンを
酸化した後、その酸化水をシックナー等に送給沈澱させ
て、酸化水中に混入する、バクテリアの吸着した担体を
回収して、これを再び上記酸化槽に還元する作業を繰り
返して行うものが知られている（同一出願人の特許出願
に係る特開昭55−119498号公報参照）。Conventionally, bacterial oxidation of ferrous sulfate has been performed by adding a carrier prepared by adsorbing and concentrating iron-oxidizing bacteria to fine particles of basic iron sulfate, diatomaceous earth, etc. to a ferrous sulfate solution and supplying it to an oxidizing tank. By aeration by blowing air, the ferrous ions are oxidized while supplying oxygen and flowing the bacterial carrier, and then the oxidized water is fed to a thickener or the like to precipitate and mix in the oxidizing water. It is known that the adsorbed carrier is recovered, and the operation of reducing the adsorbed carrier again in the oxidation tank is repeated (see Japanese Patent Application Laid-Open No. 55-119498 of the same applicant).
しかし、上述した従来のバクテリア酸化法では、曝気
に要する送風機の動力費や保守点検費を高騰させていた
他、酸化槽並びにバクテリア回収設備が大型化して多大
の建設費と設置面積を必要とするという問題点が見られ
たものであった。However, in the above-mentioned conventional bacterial oxidation method, the power of the blower required for aeration and the maintenance and inspection costs have risen, and the oxidation tank and the bacteria recovery equipment have become large in size, which requires a large construction cost and installation area. That was the problem.
そこで本発明者は、硫酸第１鉄を含む廃水を、空気と
の接触が充分行われる様な特殊な充填材の間隙を流下さ
せることにより、極めて小さい落差で多量の酸素を廃水
中に溶存させた後、その廃水が鉄酸化バクテリアを付
着、濃縮した比表面積の大きい着床材を充填してなる酸
化槽内を通過する間に、上記鉄酸化バクテリアと廃水中
の溶存酸素とによって第１鉄イオンの酸化を行うように
し、この行程を多段に構成された一連の装置として廃水
中の第１鉄イオンを効率よく除去し得るようにしたもの
である。Therefore, the present inventor causes a large amount of oxygen to be dissolved in the waste water with an extremely small head by causing the waste water containing ferrous sulfate to flow down through the gap of the special filler that is sufficiently contacted with air. Then, while the wastewater passes through an oxidizing tank which is filled with an iron-oxidizing bacterium-adhered and concentrated landing material having a large specific surface area, the ferric iron is dissolved by the iron-oxidizing bacteria and dissolved oxygen in the wastewater while passing through the oxidizing tank. Ion oxidation is performed, and this process is a series of devices configured in multiple stages so that ferrous ions in wastewater can be efficiently removed.
本発明の方法は、比表面積の大きい（100〜200m2/
m3）線状構造の成型品を爆気塔の充填材並びに酸化槽の
着床材として使用したことにより、廃水が比較的落差の
少ない曝気塔内を落下する間に、バクテリア酸化に要す
る充分な酸素が補給されると共に、バクテリアの槽外へ
の流出を効果的に防止するという作用を奏するものであ
る。The method of the present invention has a large specific surface area (100 to 200 m 2 /
m 3 ) By using the molded product with a linear structure as the filling material for the detonation tower and the flooring material for the oxidation tank, it is possible to sufficiently oxidize the bacteria while the wastewater falls in the aeration tower where the head is relatively small. The oxygen is replenished with sufficient oxygen, and the effect of effectively preventing the outflow of bacteria out of the tank is exerted.
以下、その構成を図面に示す実施例に従って更に具体
的に述べると、第１図は、多段構造の本発明装置におけ
る一単位（組）を示したものであって、１は下部に受槽
１′を設けてなる曝気塔、２は上記曝気塔内の略全長に
わたって収容された多数の充填材であって、塔内を流下
する廃水が空気と充分接触するように、主としてプラス
チックからなり、比表面積が100〜200m2/m3の線状構造
で一定の大きさを有する成型品〔タキロン株式会社製の
「トリカルパッキン」又は日鉄化工気株式会社製の「テ
ラレット」（いづれも商標名）など〕によって構成され
たものである。The structure will be described in more detail below with reference to an embodiment shown in the drawings. FIG. 1 shows one unit (set) in the apparatus of the present invention having a multi-stage structure, where 1 is a receiving tank 1'at the bottom. The aeration tower 2 provided with is a large number of packing materials accommodated over substantially the entire length of the aeration tower, and is mainly made of plastic and has a specific surface area so that waste water flowing down in the tower is in sufficient contact with air. With a linear structure of 100 to 200 m 2 / m 3 and a certain size (“Talical packing” manufactured by Takiron Co., Ltd. or “Terralet” manufactured by Nittetsu Kako Co., Ltd. (both are trade names) Etc.].
又３は一側が上記曝気塔の受槽１′の下底部と連通す
る酸化槽であり、その上流端は上記爆気塔の受槽１′の
下底部と連通し、該槽内には鉄酸化バクテリアが濃密に
付着可能な着床材４として、上記爆気塔の充填材と同じ
仕様の成型品を多数投入・充填したものである。Further, 3 is an oxidation tank, one side of which communicates with the lower bottom of the receiving tank 1'of the aeration tower, the upstream end of which communicates with the lower bottom of the receiving tank 1'of the blast tower, and the iron-oxidizing bacteria are contained in the tank. As the flooring material 4 which can be densely adhered, a large number of molded products having the same specifications as the filling material of the detonation tower are charged and filled.
尚、上記充填材２及び着床材４は、いづれも酸化した
鉄澱物の付着などによる目詰まりを防止して充分な通水
性を確保する反面、高い気液接触性を必要とする関係
上、その比表面積は100〜200m2/m3の線状構造の成型品
が好ましい。The filler 2 and the landing material 4 both prevent clogging due to adhesion of oxidized iron starch and ensure sufficient water permeability, but on the other hand, they require high gas-liquid contactability. A molded product having a linear structure with a specific surface area of 100 to 200 m 2 / m 3 is preferable.
更に図中５は上記酸化槽３の下流側壁において、次段
の爆気塔１の高さに見合う位置に設けられた廃水口を示
す。Further, reference numeral 5 in the figure denotes a waste water port provided on the downstream side wall of the oxidation tank 3 at a position commensurate with the height of the blast tower 1 at the next stage.
而して、本発明では第２図に見られる通り、上記第１
図と同一の構造を有する下段の装置の曝気塔１に上段側
装置の廃水口５を臨ませるようにして、装置全体を多段
構造としたものであるが、その段数は含有する第１鉄の
濃度により適宜設定されるものである。Therefore, in the present invention, as shown in FIG.
Although the aeration tower 1 of the lower apparatus having the same structure as the figure is made to face the wastewater port 5 of the upper apparatus, the entire apparatus has a multi-stage structure, but the number of stages is the same as that of the ferrous iron contained in the apparatus. It is appropriately set depending on the concentration.
次に上記装置による第１鉄イオンの酸化過程を述べる
と、先ず各段の装置における酸化槽内の床着材４に適宜
な手段により、鉄酸化バクテリアを付着、濃縮させた状
態で一段目の装置の曝気塔１内に、硫酸第１鉄を含む廃
水６を供給し、その充填材２の間隙を流下させて、酸素
を充分に溶存せしめる。Next, the oxidation process of the first iron ion by the above-mentioned apparatus will be described. First, the iron-oxidizing bacteria are adhered and concentrated by an appropriate means to the flooring material 4 in the oxidation tank in each step of the apparatus in the first step. Waste water 6 containing ferrous sulfate is supplied into the aeration tower 1 of the apparatus, and the gap between the packing materials 2 is made to flow down to sufficiently dissolve oxygen.
次に、該廃水が受槽１′より上記着床材４を充填して
なる酸化槽３内を通過する間に、廃水中の第１鉄イオン
がバクテリア酸化され、酸化水７となって排水口５より
下段側装置の曝気塔１に送給されるのであるから、各段
同様の過程で順次、酸化処理された第１鉄イオンは完全
に酸化された状態で、最終段の装置の排水口５より処理
又は回収設備に送出されるものである。Next, while the waste water passes from the receiving tank 1 ′ into the oxidizing tank 3 filled with the landing material 4, the ferrous ions in the waste water are oxidized by bacteria to become oxidizing water 7 and become a drainage port. Since it is sent to the aeration tower 1 of the device on the lower side of 5, the ferrous ions that have been subjected to the oxidation treatment are sequentially completely oxidized in the same process in each stage, and the drainage port of the device of the last stage is sequentially discharged. 5 is sent to the processing or recovery facility.
第１表（最終頁参照）は第２図に示したような三段構
成の実験装置における試験結果を示したもので、各段に
おける試料〜は、曝気塔への供給口を試料採取箇所
（ａ）とし、又曝気塔下部の受槽１′を試料採取箇所
（ｂ）、更に酸化槽の排水口を試料採取箇所（ｃ）とし
て、それぞれの溶存酸素量並びに第一鉄イオンの含有量
を測定したものである。Table 1 (see the last page) shows the test results in the experimental device having a three-stage configuration as shown in FIG. 2, and the samples in each stage have a supply port to the aeration tower at a sampling point ( a), the receiving tank 1'at the lower part of the aeration tower is used as a sampling point (b), and the drainage port of the oxidation tank is used as a sampling point (c) to measure the dissolved oxygen content and ferrous iron content. It was done.
而して同表によれば、各段の装置について一定の酸化
成績が確実に得られることが明らかである。但しこの場
合、曝気塔は直径100mmΦ、高さ1000mm、受槽１′の高
さ500mmとし、また酸化槽は巾300mm、高さ500mm、長さ1
000mmのものを使用した。Thus, according to the table, it is clear that a certain level of oxidation performance can be reliably obtained for each stage device. However, in this case, the aeration tower has a diameter of 100 mmΦ, a height of 1000 mm, and the height of the receiving tank 1'is 500 mm, and the oxidation tank has a width of 300 mm, a height of 500 mm, and a length of 1 mm.
A 000 mm one was used.
因みに本発明における上記曝気塔の持つ酸素供給機能
を把握する目的で、前記第１図に示す曝気塔即ち、直径
100mmΦ、落差1000mm、充填高900mmの実験用曝気塔を使
用して、その供給口を試料採集箇所（ａ）として、該供
給口から亜硫酸ソーダにより溶存酸素を分解除去した水
道水を毎分12.8させ、曝気塔下部（ｂ）で採取した水
について溶存酸素量を測定した結果を第２表に示す。Incidentally, for the purpose of grasping the oxygen supply function of the aeration tower in the present invention, the aeration tower shown in FIG.
Using an experimental aeration tower with 100 mmΦ, a drop of 1000 mm, and a filling height of 900 mm, the supply port was used as the sample collection point (a), and tap water from which dissolved oxygen was decomposed and removed by sodium sulfite from the supply port was made 12.8 min -1. Table 2 shows the results of measuring the amount of dissolved oxygen in the water collected in the lower part of the aeration tower (b).
※ 尚、DOは溶存酸素量である。 * DO is the amount of dissolved oxygen.
而して、上表によれば、上記曝気塔内での水中の溶存
酸素は、一気に6mg/前後に増加することが明らかであ
り、この酸素量は次式により第１鉄イオンを約42mg/
酸化する量に相当するものである。 Therefore, according to the above table, it is clear that the dissolved oxygen in the water in the aeration tower increases to about 6 mg / at a stretch, and the amount of this oxygen is about 42 mg / wt of ferrous ion according to the following equation.
It corresponds to the amount of oxidation.
4FeSO4＋2H2SO4＋O2→2Fe2（SO4）３＋2H2O 〔発明の効果〕 以上述べた通り、本発明装置によれば、極めて簡単な
設備で第１鉄イオンを含む廃水の処理効率よく行え、従
来から不可欠とされていた送風機やバクテリア回収設備
等の動力設備が省略できると同時に、無人化運転を可能
としたことによって、操業費を極めて廉価にし、又それ
ら設備の設置面積、並びに建設費や保守点検費等も大幅
に逓減出来て、著しい経済上の実益を齎らすものであ
る。4FeSO 4 + 2H 2 SO 4 + O 2 → 2Fe 2 (SO 4 ) 3 + 2H 2 O [Effect of the invention] As described above, according to the device of the present invention, the treatment of wastewater containing ferrous ions is extremely simple equipment. It can be done efficiently, and power equipment such as blowers and bacteria recovery equipment that have been indispensable from the past can be omitted, and at the same time unmanned operation enables extremely low operating costs and the installation area of those equipment, In addition, construction costs and maintenance and inspection costs can be greatly reduced, resulting in remarkable economic benefits.
第１図は本発明方法の実施に使用される装置単体を示す
中心部縦断面図、第２図は上記装置を三段構成とした実
施例の配置図である。 尚、図中１……曝気塔、２……充填材、３……酸化槽、
４……着床材、５……排水口、６……廃水、７……酸化
水。FIG. 1 is a vertical cross-sectional view of a central portion showing a single device used for carrying out the method of the present invention, and FIG. 2 is a layout view of an embodiment in which the above device has a three-stage structure. In the figure, 1 ... aeration tower, 2 ... packing material, 3 ... oxidation tank,
4 ... Flooring material, 5 ... Drainage port, 6 ... Waste water, 7 ... Oxidizing water.
Claims (1)
により酸化する装置において、爆気塔と、その受槽下底
部に連結される酸化槽を一組とする装置を複数組直列状
に段設して、上記廃水が落差を利用して自然流下可能に
構成し、上記爆気塔の充填材および酸化槽の着床材とし
て、比表面積が100〜200m2/m3のプラスチック等からな
る線状構造の多数の成型品を投入充填する一方、上記酸
化槽の着床材には予め鉄酸化バクテリアを濃密に吸着さ
せたことを特徴とする硫酸第１鉄を含む廃水の簡易バク
テリア酸化装置。1. A device for oxidizing wastewater containing ferrous sulfate by iron-oxidizing bacteria, wherein a plurality of sets of devices each comprising a detonation tower and an oxidation tank connected to the lower bottom of the receiving tank are connected in series. Installed, the waste water is configured to be able to flow down naturally by using the head, and is made of plastic etc. with a specific surface area of 100-200 m 2 / m 3 as the filling material of the detonation tower and the landing material of the oxidation tank. A simple bacterial oxidizer for waste water containing ferrous sulfate, characterized in that while a large number of molded products having a linear structure are charged and filled, iron-oxidizing bacteria are preliminarily densely adsorbed on the flooring material of the oxidizing tank. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62157131A JP2553470B2 (en) | 1987-06-23 | 1987-06-23 | Simple bacterial oxidizer for wastewater containing ferrous sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62157131A JP2553470B2 (en) | 1987-06-23 | 1987-06-23 | Simple bacterial oxidizer for wastewater containing ferrous sulfate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63319100A JPS63319100A (en) | 1988-12-27 |
| JP2553470B2 true JP2553470B2 (en) | 1996-11-13 |
Family
ID=15642880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62157131A Expired - Fee Related JP2553470B2 (en) | 1987-06-23 | 1987-06-23 | Simple bacterial oxidizer for wastewater containing ferrous sulfate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553470B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5756282B2 (en) * | 2010-11-26 | 2015-07-29 | Ｄｏｗａテクノエンジ株式会社 | Treatment system for acidic wastewater containing heavy metals |
| CN113737251B (en) * | 2021-08-31 | 2022-12-30 | 颖兴新材料(广东)有限公司 | Phosphorization method for removing ferrous iron by utilizing aeration and phosphorization system thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55119498A (en) * | 1979-03-06 | 1980-09-13 | Dowa Koei Kk | Simply oxidizing method for ferrous ion-containing waste water with bacteria |
| JPS6064692A (en) * | 1983-09-16 | 1985-04-13 | Mitsubishi Plastics Ind Ltd | Wastewater purification method |
| JPS60132696A (en) * | 1984-03-31 | 1985-07-15 | Masato Hara | Sewage purification filter bed utilizing kokaseki rock lump |
| JPH0128864Y2 (en) * | 1984-12-03 | 1989-09-01 |
-
1987
- 1987-06-23 JP JP62157131A patent/JP2553470B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63319100A (en) | 1988-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5520818A (en) | Method for effecting gas-liquid contact | |
| EP0633810A1 (en) | Method and apparatus for effecting gas-liquid contact | |
| KR920007932A (en) | How to remove the toxicity of sewage sludge | |
| EP0193007A3 (en) | Process and apparatus for the biological purification of waste water | |
| EP0191483A3 (en) | Method and apparatus for biological aerobic wastewater treatment | |
| JP2553470B2 (en) | Simple bacterial oxidizer for wastewater containing ferrous sulfate | |
| Van der Hoek et al. | Optimization of the sulphur-limestone filtration process for nitrate removal from groundwater | |
| US4968008A (en) | Bioleaching apparatus and system | |
| US4155977A (en) | Pollution control system | |
| JPH0947779A (en) | Water purification method and apparatus | |
| GB1490897A (en) | Hydrogen sulphide removal from waste fluid | |
| JPS61136490A (en) | Aeration type waste water treatment apparatus | |
| US6258274B1 (en) | Method for reducing sludge within a river or the like | |
| NL8402134A (en) | METHOD FOR BIOLOGICAL PURIFICATION OF WASTE WATER, AND APPARATUS FOR CARRYING OUT THIS PROCESS. | |
| US5500130A (en) | Method for effecting gas-liquid contact | |
| JP2005125302A (en) | Diffuser | |
| JPS62258729A (en) | Gas blowing-in method for aeration tank | |
| JP4431753B2 (en) | Method and apparatus for purifying nitrogen oxide-containing air | |
| JPS574296A (en) | Biochemical removing method of cod in waste water due to sulfur oxide | |
| JP5208599B2 (en) | Purification of groundwater containing nitrate nitrogen | |
| EP4183750A1 (en) | Device and method for water processing | |
| KR100293837B1 (en) | High speed sewage treatment device | |
| JPS6125697A (en) | Wastewater nitrogen removal equipment | |
| JPS56161892A (en) | Unstationary active sludge process | |
| JPS5832634B2 (en) | Wastewater oxidation treatment equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |