JP3187173B2 - How to process photographic wastewater - Google Patents
How to process photographic wastewaterInfo
- Publication number
- JP3187173B2 JP3187173B2 JP33662092A JP33662092A JP3187173B2 JP 3187173 B2 JP3187173 B2 JP 3187173B2 JP 33662092 A JP33662092 A JP 33662092A JP 33662092 A JP33662092 A JP 33662092A JP 3187173 B2 JP3187173 B2 JP 3187173B2
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- electrolysis
- silver
- waste liquid
- photographic processing
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/40—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture or use of photosensitive materials
Landscapes
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Physical Water Treatments (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は写真漂白定着液、写真漂
白液及び写真定着液（本明細書においてはこれらを写真
処理液と総称する）の廃液（本明細書においてはこれら
を写真処理廃液と総称する）の処理方法に関し、より詳
しくは写真処理廃液からの銀の回収方法及び写真処理廃
液の再生方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste solution of a photographic bleach-fixing solution, a photographic bleaching solution and a photographic fixing solution (these are generically referred to as photographic processing solutions in this specification). More specifically, the present invention relates to a method for recovering silver from waste photographic processing liquid and a method for regenerating photographic processing waste liquid.
【０００２】[0002]
【従来の技術】従来、写真処理廃液からの銀の回収方法
として電解法、沈殿法、イオン交換法等の種々の回収方
法が用いられている。電解法においては、電解操作中の
電流密度の変化及び／又は被電解液（写真処理廃液）の
分解に起因してｐＨが変動し、その結果として電極板上
にも被電解液中にも硫化銀が生成していた。そのため回
収銀の純度が損なわれ、また電解後（即ち銀回収後）の
被電解液中には硫化銀が含まれているために写真処理液
として再利用することが出来ないという欠点があった。2. Description of the Related Art Conventionally, various methods for recovering silver from waste photographic processing liquid, such as an electrolytic method, a precipitation method, and an ion exchange method, have been used. In the electrolysis method, the pH fluctuates due to the change in current density during the electrolysis operation and / or the decomposition of the liquid to be electrolyzed (photographic processing waste liquid). Silver had formed. Therefore, the purity of the recovered silver is impaired, and the electrolyzed solution after electrolysis (that is, after the recovery of silver) contains silver sulfide, so that it cannot be reused as a photographic processing solution. .
【０００３】[0003]
【発明が解決しようとする課題】本発明は、このような
従来技術の問題点に鑑みてなされたものであり、本発明
の目的は、銀を高純度で回収でき、且つ銀回収後の被電
解液をそのままで写真処理液として再利用できる写真処
理廃液の処理方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to recover silver with high purity and to remove silver after recovering silver. It is an object of the present invention to provide a method for treating a photographic processing waste liquid which can reuse an electrolytic solution as it is as a photographic processing liquid.
【０００４】本発明者等は、上記目的を達成し得る写真
処理廃液の処理方法として、ＰＲ−パルス電解を用いて
該写真処理廃液を電解すること、この際にカソード基準
のマイナス側のパルスの電気量をプラス側のパルスの電
気量よりも多くすることを特徴とする処理方法を提案し
ているが、その処理方法の電解析出効率及び析出銀層の
平滑化を更に改善し得る処理方法について種々検討の結
果、本発明に到達した。The present inventors have proposed a method of treating a photographic processing waste liquid which can achieve the above object by electrolyzing the photographic processing waste liquid using PR-pulse electrolysis, and in this case, a negative pulse with respect to the cathode reference. A processing method characterized in that the amount of electricity is made larger than the amount of electricity of the pulse on the positive side has been proposed, but a processing method capable of further improving the electrolytic deposition efficiency and the smoothness of the deposited silver layer of the processing method As a result of various studies, the present inventors have reached the present invention.
【０００５】[0005]
【課題を解決するための手段】本発明の写真処理廃液の
処理方法は、写真処理廃液に超音波を作用させながらＰ
Ｒ（periodic reverse、周期的逆転）−パルス電解を用
いて該写真処理廃液を電解処理すること、この際にカソ
ード基準の（即ち、銀を析出させる側の電極について）
マイナス側のパルスの電気量をプラス側のパルスの電気
量よりも多くすることを特徴とする。According to the present invention, there is provided a method for treating a photographic processing waste liquid, the method comprising:
R (periodic reverse)-electrolytic treatment of the photographic wastewater using pulsed electrolysis, with reference to the cathode (i.e. for the electrode on which silver is deposited)
It is characterized in that the electric quantity of the negative pulse is made larger than the electric quantity of the positive pulse.
【０００６】本発明のその他の態様として、本発明の写
真処理廃液の処理方法は、陰極電極を揺動させ（以下、
陰極電極の揺動をカソードロックという）且つ写真処理
廃液に超音波を作用させながらＰＲ−パルス電解を用い
て該写真処理廃液を電解すること、この際にカソード基
準のマイナス側のパルスの電気量をプラス側のパルスの
電気量よりも多くすることを特徴とする。In another aspect of the present invention, a method for treating a photographic processing waste liquid according to the present invention comprises the steps of:
Electrolysis of the photographic processing waste liquid using PR-pulse electrolysis while applying ultrasonic waves to the photographic processing waste liquid, while the swing of the cathode electrode is referred to as a cathode lock. Is larger than the electric quantity of the positive pulse.
【０００７】本発明の処理方法においては、写真処理廃
液に超音波を作用させながら該写真処理廃液を電解する
こと、ＰＲ−パルス電解を用いること、及び電解の際の
マイナス側のパルスの電気量をプラス側のパルスの電気
量よりも多くすることが必須の要件であり、好ましくは
更にカソードロックさせながら電解を実施するが、用い
るＰＲ−パルスは定電位ＰＲ−パルスであっても定電流
ＰＲ−パルスであってもよく、また他の電解条件等は通
常の電解で用いられている条件でよく、連続式でもバッ
チ式でもよい。本発明の処理方法は例えば次のような装
置、条件下で実施することができる（尚、本明細書にお
いて、電流密度についてマイナスの値は電子（ｅ - ）が
銀析出電極から液中に流れる場合（即ち銀が析出する場
合）を表し、プラスの値は電子が液中から銀析出電極に
流れる場合を表すものとする）： 電解槽：二次元電極を使用した電解槽、三次元のベッド
電極を使用した電解槽、回転電極電解槽、 超音波発生装置：電子電源装置によって駆動されるサン
ドイッチ型圧電性変換器等の公知の超音波発生装置、 超音波の周波数：２０〜４８ｋＨｚ、好ましくは３５〜
４５ｋＨｚ、 超音波の出力密度：２０〜６００Ｗ/cm2、好ましくは１
００〜５００Ｗ/cm2、 ＰＲ−パルス印加時間： マイナス側の印加時間（ｔ- ）：０．１〜９００msec、
好ましくは０．５〜１００msec、 プラス側の印加時間（ｔ+ ）：０．０１〜１００msec、
好ましくは０．１〜２０msec、 ＰＲ−パルス周期（ｔ- とｔ+ の和）：０．１１msec〜
１sec 、好ましくは０．６〜１２０msec、 ＰＲ−パルスの電流密度： マイナス側の電流密度（ｉ- ）：−５〜−１５０ｍＡ/c
m2、好ましくは−２０〜−６０ｍＡ/cm2、 プラス側の電流密度（ｉ+ ）：＋０．５〜＋５０ｍＡ/c
m2、好ましくは＋１〜＋３０ｍＡ/cm2、 ＰＲ−パルスの電位（ＳＣＥ基準で）： マイナス側（Ｖ- ）：−３００〜−９５０ｍＶ、好まし
くは−５００〜−９４０ｍＶ、 プラス側（Ｖ+ ）：＋５０〜＋１３５０ｍＶ、好ましく
は＋１００〜＋１３００ｍＶ、 カソードロックの移動ストローク：５０〜４５０ｍｍ、
好ましくは１００〜２００ｍｍ、 カソードロックの移動速度：５０〜３００cm/min、好ま
しくは１００〜２００cm/min。In the processing method of the present invention, the photographic processing waste liquid is electrolyzed while applying ultrasonic waves to the photographic processing waste liquid, PR-pulse electrolysis is used, and the amount of electricity of the negative pulse during electrolysis is reduced. Is required to be larger than the amount of electricity of the pulse on the plus side, and the electrolysis is preferably performed while further locking the cathode. Even if the PR-pulse used is a constant potential PR-pulse, the constant current PR -A pulse may be used, and other electrolysis conditions and the like may be conditions used in normal electrolysis, and may be a continuous type or a batch type. The treatment method of the present invention can be carried out, for example, under the following apparatus and conditions (in this specification,
There, the current density for the negative value an electron (e -) is
When flowing into the liquid from the silver deposition electrode (that is, when silver is deposited
The positive value indicates that electrons are transferred from the liquid to the silver deposition electrode.
(It indicates the flow.): Electrolyzer : Electrolyzer using two-dimensional electrode, electrolyzer using three-dimensional bed electrode, rotating electrode electrolyzer, Ultrasonic generator: sandwich driven by electronic power supply A known ultrasonic generator such as a piezoelectric transducer, the frequency of the ultrasonic wave: 20 to 48 kHz, preferably 35 to
45 kHz, ultrasonic power density: 20 to 600 W / cm 2 , preferably 1
00-500 W / cm 2 , PR-pulse application time: negative side application time (t − ): 0.1-900 msec,
Preferably 0.5 to 100 msec, plus application time (t + ): 0.01 to 100 msec,
Preferably, 0.1 to 20 msec, PR-pulse period (sum of t - and t + ): 0.11 msec-
1 sec, preferably 0.6~120msec, PR- pulse current density: the negative current density (i -): - 5~- 150mA / c
m 2 , preferably −20 to −60 mA / cm 2 , plus current density (i + ): +0.5 to +50 mA / c
m 2, preferably + 1~ + 30mA / cm 2, PR- pulse potential (in SCE standard): negative (V -): - 300~- 950mV, preferably -500~-940mV, positive (V +) : +50 to +1350 mV, preferably +100 to +1300 mV, moving stroke of the cathode lock: 50 to 450 mm,
The moving speed of the cathode lock is preferably 50 to 300 cm / min, and more preferably 100 to 200 cm / min.
【０００８】本発明の処理方法において、カソード基準
のマイナス側のパルスの電気量をプラス側のパルスの電
気量よりも多くする方法としては、マイナス側のパルス
の電流密度とプラス側のパルスの電流密度の絶対値を等
しくして印加時間（ｔ- 及びｔ+ ）を調節するか、印加
時間を等しくしてマイナス側のパルスの電流密度をプラ
ス側のパルスの電流密度の絶対値よりも大きくするか、
あるいは印加時間及び電流密度の両方を調節する方法が
ある。In the processing method of the present invention, as a method for making the electric quantity of the pulse on the negative side with respect to the cathode larger than the electric quantity of the pulse on the positive side, the current density of the pulse on the negative side and the electric current of the pulse on the positive side are used. Adjust the application time (t - and t + ) by making the absolute value of the density equal, or make the current time of the negative pulse larger than the absolute value of the current density of the positive pulse by making the application time equal. Or
Alternatively, there is a method of adjusting both the application time and the current density.
【０００９】本発明の処理方法においては、ＰＲ−パル
ス電解を用いるので陰極板上に析出する銀は微細で緻密
な粒子となり、しかも平滑に析出し、また本発明の処理
方法においては写真処理廃液に超音波を作用させながら
電解するので、被電解液がミクロに撹拌されて拡散層が
減少し、限界電流密度が上昇し、電極へのイオンの供給
がスムーズになり、均一導電性、電解析出効率及びレベ
リングが向上する。従って、従来技術で生じていたよう
な陰極面上の特異な電荷の集中による電流密度の乱れは
本発明の処理方法においては発生しない。即ち、従来技
術で生じていたような電極近傍でのイオンの枯渇に起因
する析出銀粒子径の増大は防止でき、更にＰＲ−パルス
電解を用いることにより陰極での水素の発生及び陽極で
の酸素の発生を極端に低下させることができるのでｐＨ
の変動がなく、従って従来技術で生じていたようなｐＨ
の変動に起因するチオ硫酸と銀塩とからの硫化銀の生成
は本発明の処理方法においては防止できる。即ち、本発
明の処理方法においては銀析出反応以外の副反応を抑制
することができる。このような作用、効果をより効果的
に達成するためには、本発明の処理方法においては、定
電位ＰＲ−パルス電解の場合にはマイナス側のパルスの
電気量をプラス側のパルスの電気量の２〜１０倍にする
ことが好ましく、また定電流ＰＲ−パルス電解の場合に
はマイナス側のパルスの電気量をプラス側のパルスの電
気量の２〜７００倍にすることが好ましい。この範囲か
ら外れる場合には陰極板上に析出する銀はやや粗い粒子
となり、析出銀表面の平滑が低下する傾向がある。In the processing method of the present invention, since the PR-pulse electrolysis is used, silver deposited on the cathode plate becomes fine and dense particles and is deposited smoothly, and in the processing method of the present invention, photographic processing waste liquid is used. Electrolysis while applying ultrasonic waves to the electrolyte, the liquid to be electrolyzed is agitated microscopically, the diffusion layer is reduced, the limiting current density is increased, the supply of ions to the electrodes is smooth, uniform conductivity, electric analysis Output efficiency and leveling are improved. Accordingly, the disturbance of the current density due to the concentration of unique charges on the cathode surface as in the prior art does not occur in the processing method of the present invention. That is, it is possible to prevent an increase in the particle size of precipitated silver due to the depletion of ions near the electrode as occurred in the prior art, and further, by using PR-pulse electrolysis, generation of hydrogen at the cathode and oxygen at the anode. PH can be extremely reduced.
PH, and thus the pH as in the prior art
The formation of silver sulfide from thiosulfuric acid and a silver salt due to the fluctuation of silver can be prevented in the processing method of the present invention. That is, in the processing method of the present invention, side reactions other than the silver precipitation reaction can be suppressed. In order to achieve such effects and effects more effectively, in the treatment method of the present invention, in the case of constant potential PR-pulse electrolysis, the electric quantity of the negative pulse is changed to the electric quantity of the positive pulse. In the case of constant current PR-pulse electrolysis, it is preferable that the electric quantity of the negative pulse be 2 to 700 times the electric quantity of the positive pulse. When it is out of this range, silver precipitated on the cathode plate becomes slightly coarse particles, and the smoothness of the surface of the precipitated silver tends to decrease.
【００１０】本発明の好ましい態様においてはカソード
ロックを併用するので、この場合に陰極板は超音波で生
じるキャビテーション効果を均一且つ有効に受けるよう
になり、それで電解析出する結晶粒子が小さくなり、ピ
ンホールが消失するという効果が得られる。In a preferred embodiment of the present invention, since the cathode lock is used together, in this case, the cathode plate is uniformly and effectively subjected to the cavitation effect generated by the ultrasonic wave, whereby the crystal grains to be electrolytically deposited are reduced, The effect that the pinhole disappears is obtained.
【００１１】本発明の処理方法においては、陰極板上、
陽極板上及び被電解液中生成する傾向のある硫化銀の生
成を抑制できるので、回収銀の純度が向上し且つ電解処
理後の被電解液をそのまま写真処理液として再利用する
ことが出来る。[0011] In the processing method of the present invention, on the cathode plate,
Since the formation of silver sulfide, which tends to form on the anode plate and in the electrolyte solution, can be suppressed, the purity of the recovered silver is improved, and the electrolyte solution after the electrolytic treatment can be reused as a photographic processing solution as it is.
【００１２】[0012]
実施例１〜４、参考例１〜２及び比較例１〜２ 写真漂白定着廃液（銀含有量約８ｇ／ｌ）を下記の条件
下で電解した： 電解槽：超音波発生器付二次元電極電解槽、 作用超音波の周波数及び出力密度：表１に示す通り、 作用極：ＳＵＳ ３０４ 対極：白金、 運転形式：バッチ操作、操作時間３時間、 ＰＲ−パルス印加時間（ｔ- 、ｔ+ ）：表１に示す通り
（単位はmsec）、 定電位ＰＲ−パルスを使用、その定電位（ＳＣＥ基準
で）（Ｖ- 、Ｖ+ ）：表１に示す通り（単位はｍＶ）、 カソードロックの移動ストローク及び移動速度：表１に
示す通り、 上記の条件下で電解した後に電解析出物をＥＳＣＡ分析
したところ、表１に示す通りであった（単位は重量
％）。電解後の被電解液を濾過したが濾残は認められな
かった（硫化銀が存在する場合には黒色の濾残が生じ
る）。即ち硫化銀は生成していなかった。Examples 1-4, Reference Examples 1-2 and Comparative Examples 1-2 Photo bleach-fix wastes (silver content about 8 g / l) were electrolyzed under the following conditions: Electrolyzer: two-dimensional electrode with ultrasonic generator electrolyzer, acting ultrasonic frequency and power density: as shown in Table 1, the working electrode: SUS 304 counter: platinum, mode of operation: batch operation, the operation time of 3 hours, PR- pulse applying time (t -, t +) : As shown in Table 1 (unit is msec), use the constant potential PR- pulse, its (the SCE reference) constant potential (V -, V +): As shown in Table 1 (unit mV), cathode lock Moving stroke and moving speed: As shown in Table 1, after performing electrolysis under the above conditions, the electrolytic deposit was subjected to ESCA analysis, and the result was as shown in Table 1 (unit:% by weight). The electrolysis solution after the electrolysis was filtered, but no filtration residue was observed (when silver sulfide was present, a black filtration residue was formed). That is, no silver sulfide was formed.
【００１３】[0013]
【表１】 [Table 1]
【００１４】実施例５〜８及び比較例３〜４ 写真漂白定着廃液（銀含有量約８ｇ／ｌ）を下記の条件
下で電解した： 電解槽：超音波発生器付二次元電極電解槽、 作用超音波の周波数及び出力密度：表１に示す通り、 作用極：ＳＵＳ ３０４ 対極：白金、 運転形式：バッチ操作、操作時間３時間、 ＰＲ−パルス印加時間（ｔ- 、ｔ+ ）：表１に示す通り
（単位はmsec）、 定電流ＰＲ−パルスを使用、そのＰＲ−パルスの電流密
度（ｉ- 、ｉ+ ）：表２に示す通り（単位はｍＡ/c
m2）、 カソードロックの移動ストローク及び移動速度：表１に
示す通り、 上記の条件下で電解した後に電解析出物をＥＳＣＡ分析
したところ、表１に示す通りであった（単位は重量
％）。電解後の被電解液を濾過したが濾残は認められな
かった（硫化銀が存在する場合には黒色の濾残が生じ
る）。即ち硫化銀は生成していなかった。Examples 5-8 and Comparative Examples 3-4 Photobleaching and fixing effluent (silver content about 8 g / l) was electrolyzed under the following conditions: Electrolyzer: two-dimensional electrode electrolyzer with ultrasonic generator, action ultrasonic frequency and power density: as shown in Table 1, the working electrode: SUS 304 counter: platinum, mode of operation: batch operation, the operation time of 3 hours, PR- pulse applying time (t -, t +): Table 1 As shown in (in msec), use the constant current PR- pulse, its PR- pulse current density (i -, i +): As shown in Table 2 (unit: mA / c
m 2 ), moving stroke and moving speed of the cathode lock: as shown in Table 1, the electrolytic deposit was subjected to ESCA analysis after electrolysis under the above conditions. As a result, the result was as shown in Table 1 (unit:% by weight) ). The electrolysis solution after the electrolysis was filtered, but no filtration residue was observed (when silver sulfide was present, a black filtration residue was formed). That is, no silver sulfide was formed.
【００１５】[0015]
【表２】 [Table 2]
【００１６】表１及び２に示すデータから明らかなよう
に、本発明の処理方法（実施例１〜８）は従来公知の技
術（比較例１〜４）と比較して顕著な効果を達成してお
り、またＰＲ−パルス電解を用いるが超音波、カソード
ロックを用いない方法（参考例１〜２）と比較して回収
銀の純度を向上させている。As is evident from the data shown in Tables 1 and 2, the processing method of the present invention (Examples 1 to 8) achieves a remarkable effect as compared with the conventionally known techniques (Comparative Examples 1 to 4). Further, the purity of recovered silver is improved as compared with the method using PR-pulse electrolysis but not using ultrasonic waves and the cathode lock (Reference Examples 1 and 2).
【００１７】[0017]
【発明の効果】本発明の処理方法により、銀を高純度で
回収でき、且つ銀回収後の被電解液をそのままで写真処
理液として再利用できる。According to the processing method of the present invention, silver can be recovered with high purity, and the electrolyzed solution after recovery of silver can be reused as a photographic processing solution as it is.
フロントページの続き (56)参考文献 特開 平３−141348（ＪＰ，Ａ) 特開 昭53−32869（ＪＰ，Ａ) 特開 昭49−119457（ＪＰ，Ａ) 特開 昭49−119458（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C03C 5/00 C03C 11/00 C02F 1/46 Continuation of the front page (56) References JP-A-3-141348 (JP, A) JP-A-53-32869 (JP, A) JP-A-49-119457 (JP, A) JP-A-49-119458 (JP, A) , A) (58) Fields studied (Int. Cl. 7 , DB name) C03C 5/00 C03C 11/00 C02F 1/46
Claims (4)
ＰＲ−パルス電解を用いて該写真処理廃液を電解処理す
ること、この際にカソード基準のマイナス側のパルスの
電気量をプラス側のパルスの電気量よりも多くすること
を特徴とする写真処理廃液の処理方法。1. An electrolytic treatment of a photographic processing waste liquid using PR-pulse electrolysis while applying ultrasonic waves to the photographic processing waste liquid. At this time, the electric quantity of a negative pulse with respect to a cathode is changed to a positive pulse. A method for treating a photographic processing waste liquid, wherein the amount of electricity is larger than the amount of electricity.
超音波を作用させながらＰＲ−パルス電解を用いて該写
真処理廃液を電解処理すること、この際にカソード基準
のマイナス側のパルスの電気量をプラス側のパルスの電
気量よりも多くすることを特徴とする写真処理廃液の処
理方法。2. Electrolyzing the photographic processing waste liquid using PR-pulse electrolysis while oscillating the cathode electrode and applying ultrasonic waves to the photographic processing waste liquid. A method for treating a photographic processing waste liquid, wherein the amount of electricity is made larger than the amount of electricity of a positive pulse.
カソード基準のマイナス側のパルスの電気量をプラス側
のパルスの電気量の２〜１０倍にすることを特徴とする
請求項１又は２記載の処理方法。3. Use of constant potential PR-pulse electrolysis.
3. The processing method according to claim 1, wherein the amount of electricity of the pulse on the minus side with respect to the cathode is set to 2 to 10 times the amount of electricity of the pulse on the plus side.
カソード基準のマイナス側のパルスの電気量をプラス側
のパルスの電気量の２〜７００倍にすることを特徴とす
る請求項１又は２記載の処理方法。4. Use of constant current PR-pulse electrolysis.
3. The processing method according to claim 1, wherein the electric quantity of the pulse on the negative side with respect to the cathode is set to be 2 to 700 times the electric quantity of the pulse on the positive side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33662092A JP3187173B2 (en) | 1992-10-06 | 1992-11-23 | How to process photographic wastewater |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29200692 | 1992-10-06 | ||
| JP4-292006 | 1992-10-06 | ||
| JP33662092A JP3187173B2 (en) | 1992-10-06 | 1992-11-23 | How to process photographic wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06175298A JPH06175298A (en) | 1994-06-24 |
| JP3187173B2 true JP3187173B2 (en) | 2001-07-11 |
Family
ID=26558796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33662092A Expired - Fee Related JP3187173B2 (en) | 1992-10-06 | 1992-11-23 | How to process photographic wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3187173B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113830864B (en) * | 2021-11-04 | 2023-04-07 | 安庆师范大学 | Simple pendulum motion electrode sewage treatment plant |
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1992
- 1992-11-23 JP JP33662092A patent/JP3187173B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06175298A (en) | 1994-06-24 |
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