JP2827367B2 - Wastewater treatment method - Google Patents
Wastewater treatment methodInfo
- Publication number
- JP2827367B2 JP2827367B2 JP32617689A JP32617689A JP2827367B2 JP 2827367 B2 JP2827367 B2 JP 2827367B2 JP 32617689 A JP32617689 A JP 32617689A JP 32617689 A JP32617689 A JP 32617689A JP 2827367 B2 JP2827367 B2 JP 2827367B2
- Authority
- JP
- Japan
- Prior art keywords
- wastewater
- hydrogen peroxide
- gel
- immobilized
- activated sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Biological Treatment Of Waste Water (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、固定化ゲル状担体を用いて廃水を処理する
方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for treating wastewater using an immobilized gel carrier.
（従来の技術） 現在、生物的酸化法で廃水の処理を行うときは、廃水
を曝気槽に送り活性汚泥と懸濁させ空気をバブリングし
た後、処理液を沈澱槽に送液して活性汚泥を凝集沈澱さ
せることにより処理液と活性汚泥を分離している。しか
し、この方法では、大量の廃水を処理するときには便利
であるが、ビルなどの小規模施設の廃水いわゆる中水処
理を行うときには、広い敷地が必要である。また、COD
（化学的酸素要求量）及びBOD（生物的酸素要求量）の
日較差が大きい廃水が出てくる施設の場合、いわゆるバ
ルキングの危険性が高まることや、処理水質が変動する
などの問題があり、採用に難点がある。また、処理中に
増殖した活性汚泥の処理にも問題がある。(Prior art) At present, when treating wastewater by a biological oxidation method, the wastewater is sent to an aeration tank, suspended in activated sludge, and air is bubbled. Is coagulated and precipitated to separate the treatment liquid and the activated sludge. However, this method is convenient when treating a large amount of wastewater, but requires a large site when performing wastewater treatment of small-scale facilities such as buildings, so-called medium water treatment. Also COD
In the case of facilities where wastewater with a large daily difference in (chemical oxygen demand) and BOD (biological oxygen demand) comes out, there is a problem that the risk of so-called bulking increases and the quality of treated water fluctuates. There are difficulties in adopting. There is also a problem with the treatment of activated sludge that has grown during the treatment.
（発明が解決しようとする課題） 本発明の目的は、汚泥のバルキングを起こすことな
く、廃水設備の設置面積が限られている比較的小規模な
施設でも、またCOD及びBODの日較差が大きい廃水が出て
くる小規模施設の廃水でも処理可能な方法を提供するこ
とにある。(Problems to be Solved by the Invention) An object of the present invention is to provide a large-scale daily facility for COD and BOD even in a relatively small facility where the installation area of wastewater facilities is limited without causing sludge bulking. It is an object of the present invention to provide a method capable of treating even small-scale facility wastewater from which wastewater comes out.
（課題を解決するための手段） 本発明者らは、上記現状に鑑み鋭意研究した結果、本
発明に到達した。即ち本発明は、活性汚泥、好気性菌及
びカビから選ばれた一種以上及び過酸化水素分解触媒を
固定化したゲル状担体と廃水とを、過酸化水素の共存
下、接触させることを特徴とする廃水処理方法である。(Means for Solving the Problems) The present inventors have earnestly studied in view of the above-mentioned current situation, and as a result, have reached the present invention. That is, the present invention is characterized in that the activated sludge, one or more selected from aerobic bacteria and mold and a gel-like carrier on which a hydrogen peroxide decomposition catalyst is immobilized, and wastewater are contacted in the presence of hydrogen peroxide. Wastewater treatment method.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明に用いられる各種ゲル状担体としては、例え
ば、寒天、アルギン酸ナトリウム、ポリビニルアルコー
ル、カラギーナン等が利用できる。As the various gel carriers used in the present invention, for example, agar, sodium alginate, polyvinyl alcohol, carrageenan and the like can be used.
このゲル状担体に活性汚泥、好気性菌及びカビから選
ばれた一種以上及び過酸化水素分解触媒を固定化する。
活性汚泥、好気性菌またはカビは、廃水中の有機物を分
解または資化し、廃水を浄化する、好気性菌を用いる場
合、その種類には特に限定はなく、酵母菌等の有機性物
質を資化する菌であればよい。One or more selected from activated sludge, aerobic bacteria and mold and a hydrogen peroxide decomposition catalyst are immobilized on the gel-like carrier.
Activated sludge, aerobic bacteria or fungi decompose or assimilate organic matter in wastewater and purify wastewater.When aerobic bacteria are used, the type of the aerobic bacteria is not particularly limited, and organic substances such as yeast can be used. Any bacteria can be used.
過酸化水素分解触媒としては、過酸化水素を分解する
触媒能を持つものであればよく、例えば、活性炭、二酸
化マンガンなどがあげられる。しかし、二次汚染の問題
及び有機物の吸着力などから考えてみると、活性炭を用
いるのが最も好ましい。The catalyst for decomposing hydrogen peroxide may be any catalyst having a catalytic ability to decompose hydrogen peroxide, and examples thereof include activated carbon and manganese dioxide. However, considering the problem of secondary pollution and the ability to adsorb organic substances, it is most preferable to use activated carbon.
活性汚泥、好気性菌、カビまたは過酸化水素分解触媒
は固体であるので、ゲル状担体への固定化は通常の包括
固定化法で行えばよい。このとき用いるゲル状担体によ
っては、必要に応じてゲル硬化剤（例えば、アルギン酸
の場合は塩化カルシウム、カラジーナンの場合は塩化カ
リウムなど）を添加する必要がある。固定化される活性
汚泥、好気性菌、カビまたは過酸化水素分解触媒の量
は、処理すべき廃水に応じて適宜定めればよい。Since the activated sludge, aerobic bacteria, mold or hydrogen peroxide decomposing catalyst is solid, the immobilization on the gel-like carrier may be performed by a general entrapping immobilization method. Depending on the gel carrier used at this time, it is necessary to add a gel hardening agent (for example, calcium chloride in the case of alginic acid, potassium chloride in the case of carrageenan) as necessary. The amount of the activated sludge, aerobic bacteria, mold, or hydrogen peroxide decomposition catalyst to be immobilized may be appropriately determined according to the wastewater to be treated.
過酸化水素の供給は、廃水に混合してもまたそれを単
独で供給してもかまわない。このときの供給速度及び濃
度は、処理すべき廃水のCOD、BOD濃度により適宜決めれ
ば良い。The supply of hydrogen peroxide may be mixed with wastewater or supplied alone. At this time, the supply rate and the concentration may be appropriately determined depending on the COD and BOD concentrations of the wastewater to be treated.
また、本発明で調製した固定化ゲル状担体をカラムに
充填し、それに過酸化水素及び廃水を供給することによ
り、コンパクトな形で廃水処理を行うことが可能であ
る。Further, by packing the immobilized gel carrier prepared in the present invention into a column and supplying hydrogen peroxide and wastewater thereto, wastewater treatment can be performed in a compact form.
（作用） 活性汚泥、好気性菌及びカビから選ばれた一種以上及
び過酸化水素分解触媒を固定化したゲル状担体に、過酸
化水素の共存下、廃水を接触させると、過酸化水素は、
活性汚泥や過酸化水素分解触媒のもつ触媒能によりこの
ゲル表面で酸素と水に分解される。ここで発生した酸素
は、ゲル内に入り込む。ゲル内に固定化された活性汚
泥、好気性菌またはカビは、過酸化水素による阻害をう
けず、発生した酸素及び廃水と接触することになり、廃
水処理を行うことができるのである。(Action) When wastewater is brought into contact with at least one of activated sludge, aerobic bacteria and mold and a gel-like carrier on which a hydrogen peroxide decomposition catalyst is immobilized in the presence of hydrogen peroxide, hydrogen peroxide becomes
The gel is decomposed into oxygen and water on the gel surface by the catalytic ability of the activated sludge and hydrogen peroxide decomposition catalyst. The oxygen generated here enters the gel. Activated sludge, aerobic bacteria or mold immobilized in the gel is not affected by hydrogen peroxide, comes into contact with generated oxygen and wastewater, and can perform wastewater treatment.
（発明の効果） 本発明の方法で示したゲル状担体を用いて廃水処理を
行えば、以下の効果が期待できる。(Effect of the Invention) The following effects can be expected by performing wastewater treatment using the gel carrier shown by the method of the present invention.
（１）固定化活性汚泥、好気性菌またはカビを用いて廃
水処理を行えるので沈澱槽がいらない。(1) Wastewater treatment can be carried out using immobilized activated sludge, aerobic bacteria or mold, so that no precipitation tank is required.
（２）過酸化水素を用いて酸素を供給するので、曝気用
の特別な設備がいらない。そのため、廃水用の設備のた
めに大きな容積を必要としない。また、過酸化水素の添
加量をコントロールすることで、溶存酸素濃度を自由に
コントロール出来るので、CODやBODの日較差が大きい廃
水にも対応できる。(2) Since oxygen is supplied using hydrogen peroxide, no special equipment for aeration is required. Therefore, a large volume is not required for the equipment for wastewater. Also, by controlling the amount of added hydrogen peroxide, the concentration of dissolved oxygen can be freely controlled, so that it can cope with wastewater with a large daily difference in COD and BOD.
（３）過酸化水素を溶いて酸素を供給するので、曝気で
酸素を供給するよりも多量の酸素がゲル状担体に取り込
まれ、効率よく廃水の浄化を行うことができる。(3) Since oxygen is supplied by dissolving hydrogen peroxide, a larger amount of oxygen is taken into the gel carrier than oxygen is supplied by aeration, so that wastewater can be efficiently purified.
（３）ゲル状担体内に活性炭を固定化した場合は、活性
炭が過酸化水素を分解することにより酸素を供給するだ
けでなく、ゲル内に浸透する廃水中の有機物の吸着速度
を速くしていると考えられる。そして、ゲル表面に吸着
した有機物は、活性汚泥により分解されるので、活性炭
は再生されて、効率よく廃水を処理できると思われる。(3) When activated carbon is immobilized in the gel carrier, the activated carbon not only supplies oxygen by decomposing hydrogen peroxide, but also increases the adsorption rate of organic substances in the wastewater permeating into the gel. It is thought that there is. Since the organic matter adsorbed on the gel surface is decomposed by the activated sludge, the activated carbon is regenerated, and it is considered that the wastewater can be efficiently treated.
（実施例） 以下実施例により本発明を更に詳細に説明するが、本
発明は実施例にのみ限定されるものではない。(Examples) Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to Examples.
実施例 ２％アルギン酸ナトリウム水溶液1Lに活性炭40gと活
性汚泥をよく混合した後、0.05M水酸化カルシウム水溶
液中に混合液を滴下し固定化物１（実施例）を得た。Example 2 After 1 g of a 2% aqueous sodium alginate solution was mixed well with 40 g of activated carbon and activated sludge, the mixture was dropped into a 0.05 M aqueous solution of calcium hydroxide to obtain an immobilized product 1 (Example).
２％アルギン酸ナトリウム水溶液1Lに活性炭40gをよ
く混合した後、この混合液を0.05M水酸化カルシウム水
溶液中に滴下し固定化物２（比較例）を得た。After 1 g of a 2% aqueous sodium alginate solution was mixed well with 40 g of activated carbon, this mixture was dropped into a 0.05 M aqueous calcium hydroxide solution to obtain an immobilized product 2 (Comparative Example).
得られた固定化物１または２カラムに充填し、このカ
ラムに過酸化水素（濃度;0.03％）を加えた廃水（COD濃
度;700ppm）を供給した。その時、カラムから流れ出て
きた溶液のCOD濃度の経時的変化をを測定した。結果を
表１に記す。この時、COD濃度は、簡易COD測定キット
『PONALKIT−COD』（同仁化学研究所製）を用いて測定
した。The obtained immobilized product 1 or 2 was packed into a column, and the column was supplied with wastewater (COD concentration; 700 ppm) to which hydrogen peroxide (concentration: 0.03%) was added. At that time, the change with time of the COD concentration of the solution flowing out of the column was measured. The results are shown in Table 1. At this time, the COD concentration was measured using a simple COD measurement kit “PONALKIT-COD” (manufactured by Dojindo Laboratories).
表１から明らかなように、活性汚泥および活性炭を固
定化した固定化物１により、廃水が効率よく浄化され、
しかも浄化能は、長時間安定した値を示した。As is clear from Table 1, wastewater is efficiently purified by the immobilized material 1 in which activated sludge and activated carbon are immobilized,
Moreover, the purification ability showed a stable value for a long time.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C02F 3/00 - 3/34Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) C02F 3/00-3/34
Claims (2)
一種以上及び過酸化水素分解触媒を固定化したゲル状担
体と 廃水とを、 過酸化水素の共存下、接触させることを特徴とする廃水
処理方法。1. A method comprising: contacting at least one of activated sludge, aerobic bacteria and mold with a gel-like carrier having a hydrogen peroxide decomposition catalyst immobilized thereon and wastewater in the presence of hydrogen peroxide. Wastewater treatment method.
カラムに廃水及び過酸化水素を供給する特許請求の範囲
第１項に記載の廃水処理方法。2. The wastewater treatment method according to claim 1, wherein the column is filled with the immobilized gel carrier, and wastewater and hydrogen peroxide are supplied to the column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32617689A JP2827367B2 (en) | 1989-12-18 | 1989-12-18 | Wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32617689A JP2827367B2 (en) | 1989-12-18 | 1989-12-18 | Wastewater treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03188992A JPH03188992A (en) | 1991-08-16 |
| JP2827367B2 true JP2827367B2 (en) | 1998-11-25 |
Family
ID=18184892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32617689A Expired - Fee Related JP2827367B2 (en) | 1989-12-18 | 1989-12-18 | Wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2827367B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008150234A (en) * | 2006-12-15 | 2008-07-03 | Central Res Inst Of Electric Power Ind | Method and apparatus for supplying oxygen |
-
1989
- 1989-12-18 JP JP32617689A patent/JP2827367B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03188992A (en) | 1991-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |