JP3694064B2 - Shochu wastewater treatment method - Google Patents
Shochu wastewater treatment method Download PDFInfo
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- JP3694064B2 JP3694064B2 JP13604895A JP13604895A JP3694064B2 JP 3694064 B2 JP3694064 B2 JP 3694064B2 JP 13604895 A JP13604895 A JP 13604895A JP 13604895 A JP13604895 A JP 13604895A JP 3694064 B2 JP3694064 B2 JP 3694064B2
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- shochu
- wastewater
- shochu wastewater
- shellfish
- present
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Description
【０００１】
【産業上の利用分野】
本発明は醗酵が進んだ酸性の焼酎廃水の処理方法に関し、詳しくは廃棄物である貝類の有効利用をはかり、生物処理や膜処理のような後処理を可能にした焼酎廃水の処理方法に関する。
【０００２】
【発明の背景】
従来、焼酎廃水は、処理されずに畑に廃棄され、蒸発や地下浸透によって処分されていることが多い。しかし、長期間に渡り大量に廃棄されると、土壌に濾過阻害膜が形成されたりして地下浸透がしなくなり、新たに廃棄場所を探す必要が生じてくるが、現状では新たな廃棄場所を探すのは困難である。このため海洋投棄も検討されているが、海洋汚染の問題がある。また焼却炉により焼却する方法も検討されているが焼却コストがかかる問題がある。
【０００３】
更に近年、焼酎廃水を直接に膜処理する方法も試みられているが、焼酎廃水は粘度が高いのみならず、浮遊懸濁物質の含有量が多いために、すぐに膜の目詰まりが生じてしまうという問題がある。
【０００４】
更に又、焼酎廃水を直接生物処理する方法も考えられるが、焼酎廃水は醗酵が進みｐＨが低いために大量のｐＨ調整剤が必要となる。また焼酎廃水には浮遊懸濁物質自体の有機物濃度が高いため直接生物処理することは困難である。
【０００５】
【発明が解決しようとする課題】
そこで、本発明はｐＨ調整剤を用いることなく後処理である生物処理が可能となる焼酎廃水の処理方法を提供することを目的とする。
【０００６】
また本発明の他の目的は、浮遊懸濁物質に起因する負荷を軽減して後処理である生物処理や膜処理を可能にする焼酎廃水の処理方法を提供することにある。
【０００７】
【課題を解決するための手段】
上記目的を達成する本発明に係る焼酎廃水の処理方法は、焼酎廃水を３倍以上１５倍以下に希釈し、貝類の焼却灰を添加し、必要により高分子凝集剤を添加して固液分離することを特徴とし、好ましい態様としては、固液分離された処理水を、焼酎廃水の希釈水として用いることである。
【０００８】
以下、本発明について説明する。
【０００９】
本発明が適用される焼酎廃水は、ｐＨが低いためにｐＨ調整剤なしには生物処理にかけられない廃水、あるいは低ｐＨであってしかも浮遊懸濁物質濃度が高いために例えば生物処理や膜処理に直接かけることが困難な廃水が挙げられる。従って焼酎廃水に限らず酒等の醸造廃水を排除するものではない。
【００１０】
本発明においては、焼酎廃水に貝類の焼却灰を添加する前に、その焼酎廃水を予め３倍以上１５倍以下に希釈することを特徴としている。希釈倍率が３倍未満では凝集効果が認られず、また１５倍を越えることはコスト的に好ましくない。
本発明において、希釈水は固液分離された後の上澄み水（処理水）を用いることが好ましい。また処理水と共に水道水や工業用水を併用することもできる。処理水を用いた場合には水道水や工業用水の削減になるのみならず、処理水中に焼却灰等が残存しているので貝類の焼却灰の添加量を削減できるので好ましい。
【００１１】
本発明で用いられる貝類の焼却灰は、貝類を焼却炉内で約1000〜1300℃の温度で焼却して得られる焼却灰である。貝類としては、ホタテ貝、アワビ、アサリ、ハマグリ、サンゴ、ホッキ貝、カキ、ミドリ貝等が挙げられる。貝類は中身の付いたまま焼却してもよいし、又貝殻だけのまま焼却してもよい。なお焼却前の貝類には海草等が含まれていてもよい。
【００１２】
本発明では焼却灰をそのまま用いることもできるが、ふるい分けして夾雑物を除いた微粉末を用いることもできる。
【００１３】
本発明では必要により高分子凝集剤を添加することができる。高分子凝集剤としては、アニオン系、カチオン系、ノニオン系のいずれも用いることができ、粉末あるいは液状にして用いられる。
【００１４】
次に本発明の処理方法を実施するには、混和槽（スタチックミキサーで代替することもできる）、緩速攪拌槽（必須ではない）、沈澱槽（他の固液分離手段で代替も可能）を用いることができ、混和槽で貝類の焼却灰を添加混合し凝集を開始し、次いで緩速攪拌槽で凝集を成長させ、沈澱槽で固液分離する。
【００１５】
固液分離された処理水は、後処理である生物処理又は膜処理等に送られる。生物処理や膜処理は特に限定されず、各種の方法を用いることができる。本発明ではかかる後処理を可能にした点に一つの特徴がある。即ち、本発明の処理を前処理として利用するすることにより、焼酎廃水の処理プロセスを完成することができる。
【００１６】
本発明において、貝類の焼却灰と共に必要により用いられる添加剤としては、粉末又は粒状の活性炭、粘土鉱物、高炉スラグ、麦飯石等が挙げられる。
【００１７】
これらの添加剤、粉末の高分子凝集剤及び貝類の焼却灰は、予め所定の比率で混合しておいて用いることができる。またこれらの混合物はペレット状に成形しておくことも好ましいことである。
【００１８】
【作用】
貝類の焼却灰は通常廃棄物として捨てられていたが、本発明ではこれらを有効利用するものであり、資源の有効利用に寄与する。
【００１９】
また焼酎廃水にそのまま貝類の焼却灰を添加しても凝集性を示さないのが、３倍以上１５倍以下に希釈することによって凝集性が発現する。このため焼酎廃水のようなｐＨが低い焼酎廃水を低コストで前処理し、ｐＨ調整剤を用いることなく生物処理が可能となり、また膜処理等も可能となり、焼酎廃水の処理プロセスを確立することができる。
【００２０】
【実施例】
以下、本発明の実施例により、本発明の効果を例証する。
【００２１】
貝類の焼却灰の製造
火力発電所の取水管に付着した貝類を選別しないで、焼却炉で約1200℃の温度で焼却した。得られた焼却灰を取り出してそのままのものを「Ａ」とする。また得られた焼却灰を約200メッシュにふるい分けしたものを「Ｂ」とする。
【００２２】
廃水
廃水はＵ社（九州）から排出された焼酎廃水を用いた。この焼酎廃水は醗酵が進み、ｐＨが４．７であった。また粘性が高く、浮遊懸濁物質を大量に含んでいた。
【００２３】
実験例
廃水を500mlビーカーに25ml入れ、所定の希釈倍率になるように水を加えた。次いでスターラーで回転数150rpmとなるように攪拌しながら、焼却灰及び高分子凝集剤（アニオン系）を所定量加え、１分間攪拌を継続した。次いでスターラーの回転数を30rpmに変えて５分間攪拌した後、30分放置して凝集性を調べた。
【００２４】
実験結果
希釈倍率３倍、５倍、１０倍、１２倍の各々の焼酎廃水に対し、焼却灰「Ａ」、「Ｂ」について凝集性を調べたところ、凝集効果が確認された。特に１０倍希釈の場合に高い凝集性を示した。なお希釈倍率２倍では凝集効果が認められなかった。
【００２５】
【発明の効果】
本発明によれば、ｐＨ調整剤を用いることなく後処理である生物処理が可能となり、かつ浮遊懸濁物質に起因する負荷を軽減して後処理である生物処理や膜処理を可能にする。
【００２６】
また本発明によれば、資源の有効利用がはかれ、しかも焼酎廃水の処理プロセスを確立することができる。[0001]
[Industrial application fields]
The present invention relates to a method for treating acidic shochu wastewater that has undergone fermentation, and more particularly to a method for treating shochu wastewater that enables effective use of waste shellfish and enables post-treatment such as biological treatment and membrane treatment.
[0002]
BACKGROUND OF THE INVENTION
Conventionally, shochu wastewater is often discarded in the field without being treated and disposed of by evaporation or underground infiltration. However, if a large amount of waste is disposed of over a long period of time, a filtration-inhibiting membrane will be formed in the soil and the underground infiltration will cease, and it will be necessary to search for a new disposal site. It is difficult to find. For this reason, ocean dumping is being considered, but there is a problem of ocean pollution. In addition, although a method of incineration using an incinerator has been studied, there is a problem that incineration costs are high.
[0003]
In recent years, a method has also been attempted in which membrane treatment of shochu wastewater is performed directly. However, shochu wastewater not only has a high viscosity but also contains a large amount of suspended suspended solids, which immediately causes membrane clogging. There is a problem of end.
[0004]
Furthermore, a method of directly biologically treating shochu wastewater is also conceivable, but since shochu wastewater undergoes fermentation and has a low pH, a large amount of pH adjuster is required. Also, shochu wastewater is difficult to be directly biologically treated because the suspended suspended matter itself has a high organic concentration.
[0005]
[Problems to be solved by the invention]
Then, an object of this invention is to provide the processing method of the shochu waste water which can perform the biological treatment which is post-processing, without using a pH adjuster.
[0006]
Another object of the present invention is to provide a method for treating shochu wastewater that reduces the load caused by suspended suspended matter and enables post-treatment biological treatment and membrane treatment.
[0007]
[Means for Solving the Problems]
The method for treating shochu wastewater according to the present invention to achieve the above object is to dilute shochu wastewater to 3 to 15 times, add shellfish incineration ash, and if necessary, add a polymer flocculant to solid-liquid separation In a preferred embodiment, the treated water that has been subjected to solid-liquid separation is used as dilution water for shochu wastewater.
[0008]
The present invention will be described below.
[0009]
Shochu wastewater to which the present invention is applied is wastewater that cannot be subjected to biological treatment without a pH adjuster due to low pH, or low pH and high suspended suspended solids concentration, for example, biological treatment or membrane treatment. Wastewater that is difficult to apply directly to the water. Therefore, it does not exclude not only shochu wastewater but also brewery wastewater such as sake.
[0010]
In the present invention, before adding the incineration ash of shellfish to the shochu wastewater, the shochu wastewater is previously diluted 3 to 15 times. If the dilution ratio is less than 3 times, the agglomeration effect is not recognized, and exceeding 15 times is not preferable in terms of cost.
In the present invention, it is preferable to use supernatant water (treated water) after the solid-liquid separation as the dilution water. Further, tap water and industrial water can be used in combination with treated water. When treated water is used, not only tap water and industrial water are reduced, but also incineration ash and the like remain in the treated water, so that the amount of incineration ash added to shellfish can be reduced, which is preferable.
[0011]
The incineration ash for shellfish used in the present invention is an incineration ash obtained by incinerating shellfish in an incinerator at a temperature of about 1000 to 1300 ° C. Examples of the shellfish include scallops, abalone, clams, clams, corals, seashells, oysters, and green shells. Shellfish may be incinerated with the contents inside, or it may be incinerated with only the shells. The shellfish before incineration may contain seaweed and the like.
[0012]
In the present invention, incinerated ash can be used as it is, but fine powder obtained by sieving and removing impurities can also be used.
[0013]
In the present invention, a polymer flocculant can be added if necessary. As the polymer flocculant, any of anionic, cationic and nonionic types can be used, and it can be used in powder or liquid form.
[0014]
Next, in order to carry out the processing method of the present invention, a mixing tank (which can be replaced by a static mixer), a slow stirring tank (not essential), a precipitation tank (which can be replaced by other solid-liquid separation means) In a mixing tank, incineration ash of shellfish is added and mixed to start agglomeration, then agglomerates are grown in a slow stirring tank, and solid-liquid separation is performed in a precipitation tank.
[0015]
The treated water that has been subjected to solid-liquid separation is sent to biological treatment or membrane treatment as post-treatment. Biological treatment and membrane treatment are not particularly limited, and various methods can be used. The present invention has one feature in that such post-processing is made possible. That is, the treatment process of shochu waste water can be completed by utilizing the treatment of the present invention as a pretreatment.
[0016]
In the present invention, the additive used as necessary together with the incineration ash of shellfish includes powdered or granular activated carbon, clay mineral, blast furnace slag, barleystone and the like.
[0017]
These additives, the powdered polymer flocculant, and the incineration ash of shellfish can be mixed and used in advance at a predetermined ratio. It is also preferable that these mixtures are formed into pellets.
[0018]
[Action]
Incineration ash of shellfish is usually discarded as waste, but in the present invention, these are effectively used and contribute to effective use of resources.
[0019]
Moreover, even if the incineration ash of shellfish is added as it is to the shochu wastewater, it does not show cohesiveness, but cohesiveness is manifested by diluting 3 to 15 times. For this reason, shochu wastewater with low pH, such as shochu wastewater, can be pre-treated at low cost, can be biologically treated without using a pH adjuster, and can also be used for membrane treatment, etc., and establish a treatment process for shochu wastewater. Can do.
[0020]
【Example】
Hereinafter, the effect of the present invention will be illustrated by examples of the present invention.
[0021]
Production of incineration ash of shellfish Shellfish attached to the intake pipe of a thermal power plant was incinerated at a temperature of about 1200 ° C in an incinerator without sorting. The obtained incineration ash is taken out and is directly referred to as “A”. Moreover, what obtained sifted incinerated ash to about 200 mesh is set to "B".
[0022]
Wastewater Shochu wastewater discharged from Company U (Kyushu) was used as wastewater. This shochu wastewater was fermented and had a pH of 4.7. It was highly viscous and contained a large amount of suspended suspended solids.
[0023]
Experimental example 25 ml of waste water was put into a 500 ml beaker, and water was added so as to obtain a predetermined dilution ratio. Next, predetermined amounts of incinerated ash and a polymer flocculant (anionic) were added while stirring with a stirrer so that the rotation speed was 150 rpm, and stirring was continued for 1 minute. Next, the number of rotations of the stirrer was changed to 30 rpm, and the mixture was stirred for 5 minutes.
[0024]
Experimental results The cohesiveness of incineration ash "A" and "B" was examined for each shochu wastewater with a dilution ratio of 3 times, 5 times, 10 times and 12 times, and the agglomeration effect was confirmed. . In particular, a high cohesiveness was exhibited when diluted 10 times. In addition, the aggregation effect was not recognized at the dilution factor of 2 times.
[0025]
【The invention's effect】
According to the present invention, biological treatment that is post-treatment is possible without using a pH adjuster, and biological treatment and membrane treatment that are post-treatment are enabled by reducing the load caused by suspended suspended solids.
[0026]
In addition, according to the present invention, effective use of resources can be achieved, and a process for treating shochu wastewater can be established.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13604895A JP3694064B2 (en) | 1995-05-10 | 1995-05-10 | Shochu wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13604895A JP3694064B2 (en) | 1995-05-10 | 1995-05-10 | Shochu wastewater treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08299966A JPH08299966A (en) | 1996-11-19 |
| JP3694064B2 true JP3694064B2 (en) | 2005-09-14 |
Family
ID=15165966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13604895A Expired - Fee Related JP3694064B2 (en) | 1995-05-10 | 1995-05-10 | Shochu wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3694064B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPR382601A0 (en) * | 2001-03-20 | 2001-04-12 | Water Corporation, The | Treatment of coloured liquid waste |
| JP2009050752A (en) * | 2007-08-23 | 2009-03-12 | Shoichi Yoshizumi | Flocculant |
-
1995
- 1995-05-10 JP JP13604895A patent/JP3694064B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08299966A (en) | 1996-11-19 |
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