JPS6323840B2 - - Google Patents
Info
- Publication number
- JPS6323840B2 JPS6323840B2 JP12761180A JP12761180A JPS6323840B2 JP S6323840 B2 JPS6323840 B2 JP S6323840B2 JP 12761180 A JP12761180 A JP 12761180A JP 12761180 A JP12761180 A JP 12761180A JP S6323840 B2 JPS6323840 B2 JP S6323840B2
- Authority
- JP
- Japan
- Prior art keywords
- activated sludge
- snails
- nicotinic acid
- acid amide
- ppm
- 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
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
- Treatment Of Biological Wastes In General (AREA)
- Activated Sludge Processes (AREA)
Description
この発明は、活性汚泥処理方法に関し、詳しく
は、ニコチン酸アミドを添加し巻貝による活性汚
泥処理能力の低下を防止しつつ行なう活性汚泥処
理方法に関する。
近年排水規制の強化と共に都市汚水及び有機性
産業廃水を好気性微生物を用いて処理する活性汚
泥法が多く用いられている。しかし、活性汚泥槽
内において、しばしば巻貝、特にタニシが発生
し、成長と共に該活性汚泥装置系のピツトを閉塞
して正常な運転の障害となり、ことに回転円板式
活性汚泥装置においては、回転円板にタニシが付
着し、これが活性汚泥処理に不可欠な好気性微生
物や藻類を摂食するため、活性汚泥処理の大きな
障害となつていた。
これらの巻貝による活性汚泥処理障害を防止す
るため、塩素剤などの殺菌剤を該活性汚泥槽に添
加することも知られている。しかしこれらは巻貝
の防除効果は有しているが、この有効濃度におい
ては同時に活性汚泥処理に不可欠な微生物及び藻
類にも害を与えてしまい良好な活性汚泥処理が不
能となる。そのため、好気性微生物や藻類に害を
与えず、巻貝に撰択的に防除、抑制効果を有する
薬剤を添加して活性汚泥処理を行なう方法が望ま
れていた。
この発明は、上記問題点を解決すべくなされた
ものである。この発明によれば、排水、汚水等の
処理に用いる活性汚泥装置系において、ニコチン
酸アミドを保有汚泥水量を対し少なくとも
0.5ppm以上添加して、該装置系における巻貝付
着による障害を防止しつつ、排水、汚水を良好に
処理することを特徴とする活性汚泥処理方法が提
供される。
この発明に用いるニコチン酸アミドは、それ自
体人体に使用されている医薬でもあり、活性汚泥
の好気性微生物や藻類に対する害もなく、微量で
撰択的に巻貝の成長抑制、および殺滅効果を示す
ものである。通常、活性汚泥槽内に巻貝が発生し
た時点で、この発明の薬剤を微量添加することに
より、巻貝が死滅または成長抑制され、良好な活
性汚泥処理を保持することができる。
従来、特定のニコチン酸アミド誘導体が腹足類
を抑制する効果があることは、知られていた（特
公昭43−20032号）が、これらはこの発明に用い
るニコチン酸アミドに比較し、巻貝防除効果が劣
り、かつ非水溶性のため使用に適さないことが判
明した。
また、ニコチン酸アミドは二枚貝の開殻作用を
有していることも公知（特公昭52−7053号）であ
るが、二枚貝綱と巻貝の腹足綱とでは摂食方法や
生活場所、運動性等異なり、その効果を予測する
ことは困難であつた。
この発明に使用するニコチン酸アミドは、保有
汚泥水量に対して少なくとも0.5ppm以上、好ま
しくは１〜15ppmになるように添加される。ニコ
チン酸アミドを添加するに当つて、通常固体の増
量剤、たとえば好気性微生物に無害な硫酸ナトリ
ウム等の中性塩や尿素等で希釈した固体製剤が用
いられ、またニコチン酸アミドが水溶性であるの
で、水性製剤としても添加される。もちろん単品
の結晶または粉末を直接用いてもよい。
その添加方法としては、たとえば活性汚泥槽内
に巻貝が発生したとき、保有汚泥水量に対し、
10ppmになるようにニコチン酸アミドを投入し、
補給排水に対し連続的に10ppm分を注入し、濃度
を一定に維持すればよい。通常この方法により、
４〜７日間で巻貝を閉殻または殺滅せしめ、その
後の良好な活性汚泥処理を続けることができる。
また極く低濃度添加することにより、巻貝の幼生
の成長のみを抑制し、障害を予備的に防止する方
法も有効である。
この発明による活性汚泥処理方法は、非起曝式
の活性汚泥装置（例えば酸化溝方式や回転円板
法）における巻貝障害を除去するのに特に好適な
方法である。
次に、本発明を実施例にてさらに詳しく説明す
る。
実施例 １
15cm×５cm×0.5cmのビニール板上に淡水系の
好気性微生物及び藻類を繁殖させたものを２の
ビーカに入れ、淡水1.8を入れ弱いエアレーシ
ヨンを行ない、下記の淡水系巻貝10個体ずつ入
れ、１夜放置してビニール板に付着させた後、各
濃度になるようにニコチン酸アミドを添加して、
１時間後及び24時間後の運動性を観察した。その
結果は次の通りである。
The present invention relates to an activated sludge treatment method, and more particularly to an activated sludge treatment method in which nicotinic acid amide is added to prevent deterioration of activated sludge treatment ability due to snails. In recent years, with the tightening of wastewater regulations, the activated sludge method, which uses aerobic microorganisms to treat urban sewage and organic industrial wastewater, has come into widespread use. However, snails, especially snails, often occur in activated sludge tanks, and as they grow, they clog the pits of the activated sludge system and impede normal operation. Snails adhere to the boards and feed on aerobic microorganisms and algae, which are essential for activated sludge treatment, creating a major hindrance to activated sludge treatment. In order to prevent the activated sludge treatment from being impaired by these snails, it is also known to add a disinfectant such as a chlorine agent to the activated sludge tank. However, although these have the effect of controlling snails, at this effective concentration they also harm microorganisms and algae that are essential for activated sludge treatment, making it impossible to perform good activated sludge treatment. Therefore, there has been a desire for a method of activated sludge treatment by selectively adding chemicals that have the effect of controlling or suppressing snails without harming aerobic microorganisms or algae. This invention has been made to solve the above problems. According to this invention, in an activated sludge system used for treating wastewater, sewage, etc., the amount of sludge water containing nicotinic acid amide is at least
There is provided an activated sludge treatment method characterized by adding 0.5 ppm or more of the active sludge to properly treat wastewater and sewage while preventing problems caused by adhesion of snails in the equipment system. Nicotinic acid amide used in this invention is itself a medicine used in the human body, has no harm to the aerobic microorganisms and algae in activated sludge, and has the effect of selectively suppressing the growth of snails and killing them in minute amounts. It shows. Usually, by adding a small amount of the agent of the present invention when snails are generated in the activated sludge tank, the snails are killed or their growth is suppressed, and good activated sludge treatment can be maintained. It has been known in the past that certain nicotinic acid amide derivatives have the effect of suppressing gastropods (Japanese Patent Publication No. 43-20032), but compared to the nicotinic acid amide used in this invention, these have a snail control effect. It was found to be inferior and unsuitable for use due to its water insolubility. It is also known that nicotinamide has an open-shell effect on bivalves (Special Publication No. 7053/1983); etc., and it was difficult to predict its effects. Nicotinic acid amide used in this invention is added in an amount of at least 0.5 ppm or more, preferably 1 to 15 ppm, based on the amount of sludge water held. When adding nicotinic acid amide, a solid filler is usually used, such as a solid preparation diluted with a neutral salt such as sodium sulfate, which is harmless to aerobic microorganisms, or urea. Therefore, it is also added as an aqueous formulation. Of course, single crystals or powders may be used directly. For example, when snails occur in an activated sludge tank, it can be added to the amount of sludge water held.
Add nicotinic acid amide to 10 ppm,
All you need to do is to continuously inject 10 ppm into the make-up wastewater and keep the concentration constant. This method usually results in
The snails can be closed or killed in 4 to 7 days, and subsequent successful activated sludge treatment can be continued.
It is also effective to add extremely low concentrations to suppress only the growth of snail larvae and to preliminarily prevent damage. The activated sludge treatment method according to the present invention is particularly suitable for removing snail damage in non-aerated activated sludge equipment (for example, oxidation groove method or rotating disk method). Next, the present invention will be explained in more detail with reference to Examples. Example 1 Freshwater aerobic microorganisms and algae were grown on a 15 cm x 5 cm x 0.5 cm vinyl board, placed in a beaker 2, and 1.8 cm of fresh water was added and mild aeration was performed to produce the following 10 freshwater snails. After adding each sample and leaving it overnight to adhere to the vinyl board, nicotinamide was added to each concentration.
Motility was observed after 1 hour and 24 hours. The results are as follows.
【表】
上記表により、ニコチン酸アミドが1ppm以上
において巻貝類の閉殻効果が顕著に示されてい
る。またこの実験終了後においても、淡水系微生
物及び藻類は、何ら、ブランクと比較して変化が
認められなかつた。
実施例 ２
（マルタニシに対する効果）
実施例１と同様の条件にて、マルタニシのみを
用い、ニコチン酸アミドの濃度を変化させて10分
後、１時間後、３時間後の巻貝防除効果を試験し
た。結果を次表に示す。なお、比較例として公知
の防除剤の１つであるニコチン酸アミド誘導体
（特公昭43−20032号）に概当する化合物の試験結
果を同表に示した。[Table] The above table shows that the shell-closing effect on snails is remarkable when nicotinamide is 1 ppm or more. Further, even after the end of this experiment, no change was observed in the freshwater microorganisms and algae compared to the blank. Example 2 (Effect on snails) Under the same conditions as in Example 1, using only snails and varying the concentration of nicotinic acid amide, the snail control effect was tested 10 minutes, 1 hour, and 3 hours later. . The results are shown in the table below. As a comparative example, the same table shows the test results of a compound generally corresponding to a nicotinic acid amide derivative (Japanese Patent Publication No. 43-20032), which is one of the known pest control agents.
【表】
このように、本発明に使用のニコチン酸アミド
は、ニコチン酸アミド誘導体に比較して、巻貝閉
殻効果が優れていることが判明した。
実施例 ３
（二枚貝に有効な薬剤との比較）
二枚貝（特にイガイ）に対して防除効果を有す
る公知の化合物（第４級アンモニウム塩、特公昭
52−39895号）と、本発明に用いるニコチン酸ア
ミドとの巻貝防除効果の比較をマルタニシを用
い、実施例１に従つて行なつた。結果を次表に示
す。[Table] Thus, it was found that nicotinamide used in the present invention has a superior snail shell closing effect compared to nicotinamide derivatives. Example 3 (Comparison with drugs effective against bivalves) Known compounds (quaternary ammonium salts,
52-39895) and nicotinic acid amide used in the present invention, the snail control effect was compared using Malthorn snail according to Example 1. The results are shown in the table below.
【表】
この表から、二枚貝に有効な薬剤であつても本
発明方法に使用する巻貝閉殻用薬剤として適する
とは限らないことが判明した。
実施例 ４
回転円板（４段）、有効表面積800m2／100枚、
回転速度2rpm、水槽容積7.2m3、滞留時間約２時
間、処理下水量約100m3／日（流入下水平均BOD
約230mg／）の処理装置に発生したマルタニシ
の処理を行なつた（マルタニシの発生量は約50
個／m2であつた）。即ち、発生したマルタニシを
処理するために基礎投入としてニコチン酸アミド
の１％水溶液800ｇ（約11ppmになる）を水槽に
添加し、流入下水量に対して約10ppmになるよう
に、３日間ニコチン酸アミドを添加した。
その結果、基礎投入１時間後に、マルタニシは
すべて剥離し、３日後にはすべて死滅した。その
間の活性汚泥菌や藻類に対する影響は認められず
処理水のBODもマルタニシの発生以前と同等の
20〜30mg／と良好であつた。[Table] From this table, it was found that even if a drug is effective against bivalves, it is not necessarily suitable as a drug for closing snails to be used in the method of the present invention. Example 4 Rotating disk (4 stages), effective surface area 800m 2 /100 sheets,
Rotation speed 2 rpm, water tank volume 7.2 m 3 , residence time approximately 2 hours, treated sewage volume approximately 100 m 3 /day (inflow sewage average BOD
Approximately 230mg/) of Maltese mullet generated in the processing equipment was processed (the amount of Maltese mullet generated was approximately 50 mg/).
pieces/ m2 ). That is, in order to treat the generated mullet, 800 g of a 1% aqueous solution of nicotinic acid amide (approximately 11 ppm) was added to the aquarium as a basic input, and nicotinic acid was added for 3 days to a concentration of approximately 10 ppm based on the amount of inflowing sewage. Added amide. As a result, all of the mulberry plants peeled off one hour after the basal application, and all of them died three days later. During this period, no effect on activated sludge bacteria or algae was observed, and the BOD of the treated water remained at the same level as before the outbreak.
It was good at 20-30mg/.
Claims (1)
において、ニコチン酸アミドを保有汚泥水量に対
し少なくとも0.5ppm以上添加して、該装置系に
おける巻貝付着による障害を防止しつつ、排水、
汚水等を良好に処理することを特徴とする活性汚
泥処理方法。 ２ ニコチン酸アミドを保有汚泥水量に対し１〜
15ppm添加する特許請求の範囲第１項記載の活性
汚泥処理方法。[Scope of Claims] 1. In an activated sludge system used for treating wastewater, sewage, etc., at least 0.5 ppm or more of nicotinic acid amide is added to the amount of retained sludge water to prevent problems caused by adhesion of snails in the system. , drainage,
An activated sludge treatment method characterized by good treatment of sewage, etc. 2 1 to 1 for the amount of sludge water containing nicotinic acid amide
The activated sludge treatment method according to claim 1, wherein 15 ppm is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12761180A JPS5753291A (en) | 1980-09-13 | 1980-09-13 | Treatment with active sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12761180A JPS5753291A (en) | 1980-09-13 | 1980-09-13 | Treatment with active sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5753291A JPS5753291A (en) | 1982-03-30 |
| JPS6323840B2 true JPS6323840B2 (en) | 1988-05-18 |
Family
ID=14964361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12761180A Granted JPS5753291A (en) | 1980-09-13 | 1980-09-13 | Treatment with active sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5753291A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0629479U (en) * | 1992-09-25 | 1994-04-19 | 清水 正二 | Incense holder |
| JPH0744158U (en) * | 1993-04-26 | 1995-11-07 | 将美 佐藤 | Safety incense holder |
| JP2009005614A (en) * | 2007-06-27 | 2009-01-15 | Katayama Chem Works Co Ltd | Method for peeling gastropod |
| JP4962968B2 (en) * | 2008-01-18 | 2012-06-27 | 株式会社片山化学工業研究所 | Abalone peeling method |
-
1980
- 1980-09-13 JP JP12761180A patent/JPS5753291A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5753291A (en) | 1982-03-30 |
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