JPH0824912B2 - Dialysis wastewater treatment method - Google Patents
Dialysis wastewater treatment methodInfo
- Publication number
- JPH0824912B2 JPH0824912B2 JP63219384A JP21938488A JPH0824912B2 JP H0824912 B2 JPH0824912 B2 JP H0824912B2 JP 63219384 A JP63219384 A JP 63219384A JP 21938488 A JP21938488 A JP 21938488A JP H0824912 B2 JPH0824912 B2 JP H0824912B2
- Authority
- JP
- Japan
- Prior art keywords
- dialysis
- wastewater
- dialysis wastewater
- treatment
- reducing agent
- 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
- 238000000502 dialysis Methods 0.000 title claims description 73
- 238000004065 wastewater treatment Methods 0.000 title claims description 11
- 239000002351 wastewater Substances 0.000 claims description 47
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 238000005273 aeration Methods 0.000 claims description 11
- 239000003899 bactericide agent Substances 0.000 claims description 10
- 230000000844 anti-bacterial effect Effects 0.000 claims description 9
- 239000005416 organic matter Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 7
- 230000033116 oxidation-reduction process Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 description 28
- 238000006243 chemical reaction Methods 0.000 description 14
- 230000002378 acidificating effect Effects 0.000 description 13
- 229910052801 chlorine Inorganic materials 0.000 description 10
- 239000000460 chlorine Substances 0.000 description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000003860 storage Methods 0.000 description 8
- 238000001556 precipitation Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 239000000645 desinfectant Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000006386 neutralization reaction Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000001804 chlorine Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 dialysate Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- External Artificial Organs (AREA)
- Biological Treatment Of Waste Water (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、透析排水処理方法に関し、特に、透析排水
中の有機物を酸化分解する生物膜の死滅を防止できるよ
うにした透析排水処理方法に関する。Description: TECHNICAL FIELD The present invention relates to a dialysis wastewater treatment method, and more particularly to a dialysis wastewater treatment method capable of preventing the death of a biofilm that oxidatively decomposes organic substances in dialysis wastewater. .
一般に、人工透析治療においては、透析液及び透析治
療後の器械、配管内に対する消毒液及び水洗水が透析排
水として排出される。この透析排水は外部に排出される
際に殺菌の必要があり、この際用いられる殺菌剤として
次亜塩素酸系の薬品を多量に使用する。従って該透析排
水はBOD値が非常に高く、一般の浄化設備で処理するこ
とが困難である。このため、臨床検査室排水と同様に一
般の生活雑排水とは別に透析排水を処理することが必要
とされている。Generally, in the artificial dialysis treatment, the dialysate, the equipment after the dialysis treatment, and the disinfectant for the inside of the pipe and the washing water are discharged as dialysis drainage. This dialysis wastewater needs to be sterilized when it is discharged to the outside, and a large amount of hypochlorous acid-based chemicals is used as a bactericide used at this time. Therefore, the dialysis wastewater has a very high BOD value and is difficult to treat with general purification equipment. For this reason, it is necessary to treat dialysis wastewater separately from general household wastewater as well as clinical laboratory wastewater.
透析排水には有機物が多量に含まれているところか
ら、酸化分解力が強い生物膜を利用した生物処理が行わ
れる必要がある。ところが、透析排水には、上記のよう
に次亜塩素酸系殺菌剤等の酸化性物質が多量に含有され
ており、その成分は透析液の廃棄量、透析処理量、消毒
液の添加量等によって広範囲にわたって変化する。Since dialysis wastewater contains a large amount of organic matter, it is necessary to perform biological treatment using a biofilm having a strong oxidative decomposition power. However, the dialysis wastewater contains a large amount of oxidizing substances such as hypochlorous acid-based bactericides as described above, and the components are the amount of dialysate waste, the amount of dialysis treatment, the amount of disinfectant addition, etc. Varies over a wide range.
このため、有機物の酸化分解に使用される生物膜が処
理液中の酸化性液すなわち殺菌剤によって死滅し、透析
排水の浄化が不可能になるという問題がある。Therefore, there is a problem that the biofilm used for the oxidative decomposition of the organic matter is killed by the oxidizing liquid in the treatment liquid, that is, the bactericide, and purification of the dialysis wastewater becomes impossible.
上記酸化性は殺菌剤に含まれる塩素に起因するもので
あり、この塩素濃度は例えば残留塩素計によっても検出
できるが非常に高価となる欠点がある。The above-mentioned oxidizing property is caused by chlorine contained in the bactericide, and this chlorine concentration can be detected by, for example, a residual chlorine meter, but there is a drawback that it becomes very expensive.
この発明は、上記の事情を鑑みてなされたものであ
り、透析排水に多量に混入する殺菌剤が働かないように
して生物処理ができ、しかも安価に上記処理ができるよ
うにした透析排水処理方法を装置と提供することを目的
とするものである。The present invention has been made in view of the above circumstances, and a dialysis wastewater treatment method that enables biological treatment without the use of a sterilizing agent that is mixed in a large amount in dialysis wastewater and that can perform the above treatment at low cost. It is intended to provide the device with the device.
透析排水中の有機物を生物膜で酸化分解する透析排水
方法において、透析排水をPHが中性付近になるように調
整し、その後酸化還元電位計の電位が一定値以下になる
ように還元剤を添加して、透析排水を酸化分解する接触
曝気処理をするものである。In the dialysis drainage method that oxidizes and decomposes organic matter in the dialysis effluent with a biofilm, adjust the dialysis drainage so that PH is near neutral, and then add a reducing agent so that the potential of the oxidation-reduction potentiometer falls below a certain value. It is added to perform catalytic aeration treatment for oxidative decomposition of dialysis wastewater.
上記透析排水中の殺菌剤は強い酸化性を示し該酸化性
が生物処理を不能にしている。この殺菌剤の酸化性度は
酸化還元電位計によって的確に把握できる。一方、酸化
還元電位（以下ORP値という）とPHとの関係は第４図に
示す如くの関係にあり、従ってPHがある特定の値である
ORP値を最も小さい値にするとその液の酸化性は考慮し
なくてもよいことになる。従って、上記のようにPHを中
性付近に調整した後、ORP値を調整することによって殺
菌剤の作用を消すことができる。The bactericide in the dialysis wastewater has a strong oxidizing property, which makes biological treatment impossible. The oxidizing degree of this bactericide can be accurately grasped by a redox potentiometer. On the other hand, the relationship between the redox potential (hereinafter referred to as ORP value) and PH is as shown in Fig. 4, and therefore PH is a specific value.
When the ORP value is set to the smallest value, it is not necessary to consider the oxidizing property of the liquid. Therefore, the action of the bactericide can be eliminated by adjusting the ORP value after adjusting the pH to near neutral as described above.
もっとも、還元処理前のPHは中性でなくても、ある特定
のPHと残留塩素濃度（酸化還元電位）との関係は予め測
定によって求めることができるので、PHさえ伴っている
とそのPHで還元処理した後、PH処理をしてもよいことは
勿論である。However, even if the PH before the reduction treatment is not neutral, the relationship between a specific PH and residual chlorine concentration (oxidation-reduction potential) can be obtained in advance by measurement, so even if PH is involved, the PH Needless to say, the PH treatment may be performed after the reduction treatment.
以下、本出願に係る発明の実施例を図面に基づき説明
する。Hereinafter, embodiments of the invention according to the present application will be described with reference to the drawings.
透析治療は、第３図に示すように、透析装置のプリセ
ット（S1）をしてから、約30分〜50分にわたり透析装置
の内部を水で洗浄し（S2）、約10分程度の時間を掛けて
透析装置内の洗浄水を透析液に置換した後に（S3）患者
に透析装置を装着し、約６時間にわたって透析（S4）を
実行する。そして、透析（S4）が終了した後、約30分程
度にわたって透析装置の内部を水で前洗浄し（S5）、こ
の後30〜60分間にわたって薬液を使用して透析装置の内
部を消毒し（S6）、更に30分程度にわたって後洗浄をす
る（S7）。For dialysis treatment, as shown in Fig. 3, after the dialysis machine is preset (S1), the inside of the dialysis machine is washed with water (S2) for about 30 to 50 minutes, and the time is about 10 minutes. After replacing the wash water in the dialyzer with dialysate by applying (S3), the dialyzer is attached to the patient and dialysis (S4) is performed for about 6 hours. Then, after the dialysis (S4) is completed, the inside of the dialysis machine is pre-washed with water for about 30 minutes (S5), and then the inside of the dialysis machine is disinfected with a chemical solution for 30 to 60 minutes ( S6), and after-washing for about 30 minutes (S7).
そして、このような操作が７〜８時間で１回繰り返え
され、その間に洗浄水、透析液、患者体内から尿等の老
廃物、消毒剤等が透析排水として透析排水処理装置に排
出される。Then, such an operation is repeated once in 7 to 8 hours, during which washing water, dialysate, waste products such as urine from the patient's body, disinfectants, etc. are discharged to the dialysis wastewater treatment device as dialysis wastewater. It
透析排水処理装置は、例えば第１図に示すように、透
析排水を均資化する均質化処理（S11）、透析排水を中
和する中和処理（S12）、透析排水を還元する還元処理
（S13）、透析排水中の有機物を生物膜により酸化分解
させる接触曝気処理（S14）、透析排水中の固形物を沈
澱させる沈澱処理（S15）、透析排水を殺菌する殺菌処
理（S16）及び処理済みの透析排水を放流する放流処理
（S17）が順に実行されるように構成される。As shown in FIG. 1, for example, the dialysis wastewater treatment device includes a homogenization treatment (S11) for uniformizing dialysis wastewater, a neutralization treatment (S12) for neutralizing dialysis wastewater, and a reduction treatment (for reducing dialysis wastewater). S13), Contact aeration treatment to oxidize and decompose organic matter in dialysis wastewater with biofilm (S14), Precipitation treatment to precipitate solid matter in dialysis wastewater (S15), Sterilization treatment to sterilize dialysis wastewater (S16) and treated The discharge processing (S17) for discharging the dialysis wastewater is performed in order.
即ち、透析排水処理装置には、例えば第２図に示すよ
うに、透析排水を受け入れて一定時間にわたり貯留する
ことにより透析排水を均質化させる貯留槽（１）と、貯
留槽（１）内の透析排水を反応槽（２）に透析廃液を移
住する移住装置（７）と、反応槽（２）に酸性液を供給
する酸性液供給装置（３）と、反応槽（２）にはアルカ
リ性液を供給するアルカリ性液供給装置（４）と、反応
槽（２）に還元剤を供給する還元剤供給装置（６）と、
反応槽（２）から透析廃液を接触曝気槽（９）に移注す
る移注装置（８）と、透析排水中の有機物を酸化分解す
る生物膜を内蔵した接触曝気槽（９）と、曝気処理後の
透析排水から固形分を沈澱により除去する沈澱槽（10）
と、沈澱処理された透析排水に消毒剤を添加して消毒す
る消毒槽（11）とが設けられる。また、この透析排水処
理装置には、移注装置（７）、酸性液供給装置（３）、
アルカリ性液供給装置（４）、還元剤供給装置（６）及
び移注装置（８）を制御するための制御装置（５）が設
けられる。That is, for example, as shown in FIG. 2, in the dialysis wastewater treatment apparatus, a storage tank (1) for homogenizing the dialysis wastewater by receiving the dialysis wastewater and storing it for a certain time, A migration device (7) for moving the dialysis wastewater to the reaction tank (2), an acidic liquid supply device (3) for supplying an acidic liquid to the reaction tank (2), and an alkaline liquid for the reaction tank (2). An alkaline liquid supply device (4) for supplying a reducing agent, and a reducing agent supply device (6) for supplying a reducing agent to the reaction tank (2),
A transfer device (8) for transferring the dialysis waste liquid from the reaction tank (2) to the contact aeration tank (9), a contact aeration tank (9) with a built-in biofilm for oxidative decomposition of organic matter in the dialysis wastewater, and aeration Precipitation tank for removing solids from treated dialysis wastewater by precipitation (10)
And a disinfection tank (11) for disinfecting by adding a disinfectant to the dialysis wastewater that has been subjected to the precipitation treatment. Further, this dialysis wastewater treatment device includes a transfer device (7), an acidic liquid supply device (3),
A control device (5) for controlling the alkaline liquid supply device (4), the reducing agent supply device (6) and the transfer device (8) is provided.
この制御装置（５）は、例えばマイクロコンピュータ
等よりなり、均質化処理（S11）において、貯蓄槽
（１）に設けた水位センサ（58）によって貯留槽（１）
内の水位が所定値を上回る時に、おるいは、透析装置の
操作の１サイクル時間が経過するごとに、移注装置
（７）を作動させて、貯留槽（１）内の透析排水を反応
槽（２）に移注させるように構成してある。The control device (5) is composed of, for example, a microcomputer, and in the homogenization process (S11), the storage tank (1) is provided with a water level sensor (58) provided in the storage tank (1).
When the water level in the reservoir exceeds a predetermined value, the urine activates the transfusing device (7) and reacts the dialysis wastewater in the storage tank (1) with each cycle of the dialysis device operation. It is configured to be transferred to the tank (2).
移注装置（７）は貯留槽（１）内の底部から導出され
た移注管（71）と、これに介在させたポンプ（72）と、
ポンプ（72）の上流側及び下流側で移注管（71）に介在
させた各遮断弁（73）、（74）とで構成され、上記移注
管（71）は反応槽（２）の上方まで延長されている。The transfer device (7) includes a transfer pipe (71) led out from the bottom of the storage tank (1), a pump (72) interposed therein,
The pump (72) is composed of respective shutoff valves (73) and (74) interposed in the transfer pipe (71) on the upstream side and the downstream side, and the transfer pipe (71) is connected to the reaction tank (2). It has been extended to the top.
上記反応槽（２）には、透析排水と酸性液、アルカリ
性液あるいは還元剤とを効率良く接触させるためにアジ
テータ（21）が設けられる。このアジテータ（21）は透
析排水と中に突入された撹拌プロペラ（21a）と、これ
を駆動するモータ（21b）で構成されている。The reaction tank (2) is provided with an agitator (21) for efficiently contacting the dialysis wastewater with the acidic liquid, the alkaline liquid or the reducing agent. The agitator (21) is composed of a dialysis wastewater, a stirring propeller (21a) thrust into the drainage, and a motor (21b) for driving the stirring propeller.
そして、上記制御装置（５）には、透析排水のPH値を
検出するPHセンサ（51）と、透析排水のORP値（酸化還
元電位値）を検出するORPセンサ（52）と、反応槽
（２）内の水位を検出する水位センサからなる処理量検
出手段（53）の出力が入力される。The control device (5) includes a PH sensor (51) for detecting the PH value of the dialysis wastewater, an ORP sensor (52) for detecting the ORP value (oxidation-reduction potential value) of the dialysis wastewater, and a reaction tank ( The output of the processing amount detecting means (53) including a water level sensor for detecting the water level in 2) is input.
上記中和処理（S12）では、PHセンサ（51）でそのPH
値が検出され、PHセンサ（51）の検出結果に従って酸性
液を供給するかアルカリ性液を供給するかが決定され結
果に従って、酸性液供給装置（３）あるいはアルカリ性
液供給装置（４）が作動し必要量の酸性液あるいはアル
カリ性液を供給し、透析排水のPHを中性付近に保つよう
に制御する。In the neutralization process (S12), the PH sensor (51)
The value is detected, it is determined whether to supply the acidic liquid or the alkaline liquid according to the detection result of the PH sensor (51), and the acidic liquid supply device (3) or the alkaline liquid supply device (4) operates according to the result. Supply the required amount of acidic or alkaline liquid and control the pH of dialysis wastewater to keep it near neutral.
上記酸性液供給装置（３）は、酸性液貯留槽（31）
と、これから反応槽（２）まで導入された酸性液供給路
（32）と、該酸性液供給路（32）に介在された供給機構
部（32）とを有する。The acidic liquid supply device (3) includes an acidic liquid storage tank (31).
And an acidic liquid supply passage (32) introduced to the reaction tank (2) and a supply mechanism section (32) interposed in the acidic liquid supply passage (32).
またアルカリ性液供給装置（４）には、酸性液供給装
置（３）と同様に、アルカリ性液貯留槽（41）と、これ
から反応槽（２）まで導入されたアルカリ性液供給路
（42）と、該アルカリ性液供給路（42）に介在させた供
給機構部（43）とが設けられる。Further, in the alkaline liquid supply device (4), like the acidic liquid supply device (3), an alkaline liquid storage tank (41) and an alkaline liquid supply path (42) introduced from this to the reaction tank (2), A supply mechanism section (43) interposed in the alkaline liquid supply path (42) is provided.
そして、所定時間を経過して中和処理（S12）が終了
すると、還元処理（S13）が開始される。Then, when the neutralization process (S12) is completed after a predetermined time has elapsed, the reduction process (S13) is started.
還元処理（S13）では、酸化還元電位計（ORPセンサ）
（52）の検出結果から透析排水を還元するに要する還元
剤の必要量が制御装置（５）で演算され、必要量の反応
槽（２）に供給される。第４図からも明らかなようにこ
の場合、ORP値がPH7において300mV程度になるようにす
れば、酸化度の原因となっている殺菌剤による残留塩素
はほぼ零に抑えることができその後の生物処理が可能と
なる。In reduction process (S13), redox potential meter (ORP sensor)
From the detection result of (52), the required amount of the reducing agent required to reduce the dialysis wastewater is calculated by the control device (5), and the required amount is supplied to the reaction tank (2). As is clear from Fig. 4, in this case, if the ORP value is set to about 300 mV at PH7, the residual chlorine due to the bactericide that causes the degree of oxidation can be suppressed to almost zero and the subsequent organisms Processing becomes possible.
上記還元剤供給装置（６）は、還元剤を貯留する還元
剤貯留槽（61）と、これから反応槽（２）まで導出され
た還元剤供給路（62）と、該還元剤供給路（62）に介在
させた供給機構部（63）とを有しており、中和のための
酸性液供給装置（３）あるいはアルカリ性液供給装置
（４）と同様に制御装置（５）によって供給機構部（6
3）が制御される。The reducing agent supply device (6) includes a reducing agent storage tank (61) for storing a reducing agent, a reducing agent supply path (62) led to the reaction tank (2), and the reducing agent supply path (62). ) And a supply mechanism part (63) interposed between the control mechanism (5) and the acidic liquid supply device (3) or the alkaline liquid supply device (4) for neutralization. (6
3) is controlled.
上記還元処理（S13）が終了すると、反応槽（２）内
の透析排水が接触曝気槽（９）に移注され接触曝気処理
（S14）が開始される。When the reduction treatment (S13) is completed, the dialysis wastewater in the reaction tank (2) is transferred to the contact aeration tank (9), and the contact aeration processing (S14) is started.
そして、接触曝気処理（S14）では、接触曝気槽
（９）内で透析排水の有機物が生物膜に接触して酸化分
解され、消失する。ここで、透析排水は上記還元処理を
経て殺菌剤に起因する残留塩素が作用しなくなっている
ので死滅するおそれはなく、高BOD値の透析排水中の有
機物を酸化物を酸化分解により消失させることができ
る。Then, in the contact aeration process (S14), the organic matter in the dialysis wastewater comes into contact with the biofilm in the contact aeration tank (9) to be oxidatively decomposed and disappear. Here, the dialysis wastewater is not likely to be killed because residual chlorine due to the bactericidal agent does not act after the reduction treatment, and the organic matter in the high BOD value dialysis wastewater is eliminated by oxidative decomposition of oxides. You can
接触曝気槽（９）において有機物が消失された透析排
水は沈澱槽（10）に導入され、続いて沈澱処理（S14）
が開始される。沈澱処理（S14）では、剥離した生物膜
等の固形物を沈澱させて除去した後、その上澄液が消毒
槽（11）に導かれる。消毒槽（11）では透析排水に例え
ば塩素消毒剤等の消毒剤を添加して消毒処理（S15）が
行われる。そして、この消毒処理（S15）が終了すると
外部に放流される。The dialysis wastewater from which organic matter has been eliminated in the contact aeration tank (9) is introduced into the precipitation tank (10), and subsequently the precipitation treatment (S14)
Is started. In the precipitation treatment (S14), the separated solid matter such as biofilm is precipitated and removed, and then the supernatant is introduced into the disinfection tank (11). In the disinfection tank (11), disinfection treatment (S15) is performed by adding a disinfectant such as chlorine disinfectant to the dialysis wastewater. Then, when this disinfection process (S15) is completed, it is discharged to the outside.
上記実施例はバッチ処理になっているが反応槽での滞
留時間さえ充分であると連続処理も可能である。また、
上記ではPHを調整してから還元剤を添加しているが、特
定のPHで還元処理してからPH調整してもよいことは勿論
である。The above-mentioned embodiment is a batch process, but continuous process is also possible if the residence time in the reaction tank is sufficient. Also,
In the above, the reducing agent is added after adjusting the PH, but it goes without saying that the reducing treatment may be performed with a specific PH and then the PH may be adjusted.
以上のように、本出願に係る発明によれば、透析排水
を中和させた後酸化還元電位と利用して残留塩素を除去
してから生物膜に接触させるので、生物膜が死滅するこ
とを防止でき、高BOD値の透析排水を生物膜を用いて効
率良く酸化分解処理でき、BOD値を著しく下げることが
できる。また、残留塩素計等の高価な機器を用いないで
も充分満足のいく結果が得られる。As described above, according to the invention of the present application, since the residual chlorine is removed by utilizing the redox potential after neutralizing the dialysis wastewater and then contacting the biological film, it is possible to prevent the biological film from dying. The dialysis wastewater having a high BOD value can be efficiently prevented by oxidative decomposition using a biofilm, and the BOD value can be remarkably lowered. In addition, satisfactory results can be obtained without using expensive equipment such as a residual chlorine meter.
第１図は本出願の発明の一実施例に係る透析排水処理方
法の一実施例を示すフロー図、第２図は本出願の発明の
一実施例に係る透析排水処理装置の構成図、第３図は透
析治療操作サイクルを示すフロー図、第４図はPHと残留
塩素濃度との関係を示すグラフである。FIG. 1 is a flow chart showing an embodiment of a dialysis wastewater treatment method according to an embodiment of the invention of the present application, and FIG. 2 is a configuration diagram of a dialysis wastewater treatment apparatus according to an embodiment of the invention of the present application, FIG. 3 is a flow chart showing the dialysis treatment operation cycle, and FIG. 4 is a graph showing the relationship between PH and residual chlorine concentration.
Claims (2)
して酸化還元電位計の電位が一定値以下になるように還
元剤を添加することを特徴とする透析排水処理方法。1. A method for treating dialysis wastewater, which comprises adding a reducing agent so that the potential of an oxidation-reduction potentiometer becomes a predetermined value or less when removing the influence of a bactericide in the dialysis wastewater.
る透析排水処理方法において、 透析排水のPRを中性付近に調整し、その後酸化還元電位
計の電位が一定値以下になるように還元剤を添加して、
透析排水を酸化分解する接触曝気処理をすること、 を特徴とする透析排水処理方法。2. In a dialysis wastewater treatment method of oxidatively decomposing organic matter in dialysis wastewater with a biofilm, the PR of the dialysis wastewater is adjusted to near neutrality, and then the potential of the oxidation-reduction potentiometer is kept below a certain value. Add a reducing agent,
A method for treating dialysis wastewater, which comprises subjecting the dialysis wastewater to oxidative decomposition to perform contact aeration treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219384A JPH0824912B2 (en) | 1988-09-01 | 1988-09-01 | Dialysis wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219384A JPH0824912B2 (en) | 1988-09-01 | 1988-09-01 | Dialysis wastewater treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0268194A JPH0268194A (en) | 1990-03-07 |
| JPH0824912B2 true JPH0824912B2 (en) | 1996-03-13 |
Family
ID=16734573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63219384A Expired - Fee Related JPH0824912B2 (en) | 1988-09-01 | 1988-09-01 | Dialysis wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0824912B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004057703A (en) * | 2002-07-31 | 2004-02-26 | L'air Liquide Sa Pour L'etude & L'exploitation Des Procedes Georges Claude | Waste liquid treatment equipment for hemodialysis equipment |
| JP5801249B2 (en) * | 2012-04-27 | 2015-10-28 | 水ｉｎｇ株式会社 | Desalination apparatus and desalination method |
| CN114376355B (en) * | 2021-12-07 | 2024-06-07 | 广东中旗新材料股份有限公司 | Quartz kitchen operating system and quartz application method |
-
1988
- 1988-09-01 JP JP63219384A patent/JPH0824912B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0268194A (en) | 1990-03-07 |
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