JP2014124600A5 - - Google Patents
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- JP2014124600A5 JP2014124600A5 JP2012284703A JP2012284703A JP2014124600A5 JP 2014124600 A5 JP2014124600 A5 JP 2014124600A5 JP 2012284703 A JP2012284703 A JP 2012284703A JP 2012284703 A JP2012284703 A JP 2012284703A JP 2014124600 A5 JP2014124600 A5 JP 2014124600A5
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- JP
- Japan
- Prior art keywords
- tank
- bromine
- aeration tank
- aeration
- outlet side
- Prior art date
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- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 22
- 238000005273 aeration Methods 0.000 claims description 20
- 239000002351 wastewater Substances 0.000 claims description 16
- -1 bromine ions Chemical class 0.000 claims description 13
- WKBOTKDWSSQWDR-UHFFFAOYSA-N bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 10
- QWPPOHNGKGFGJK-UHFFFAOYSA-N Hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 9
- 238000004065 wastewater treatment Methods 0.000 claims description 9
- 238000010979 pH adjustment Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000001139 pH measurement Methods 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000002378 acidificating Effects 0.000 claims 1
- 239000002253 acid Substances 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Description
本発明に係る排水処理システムは、臭素イオンを含む排水を処理する排水処理システムであって、排水のｐＨを酸性にすると共に次亜塩素酸が添加される反応槽と、反応槽の下流側に設けられ、反応槽からの処理水を曝気する曝気槽と、を備える。
A wastewater treatment system according to the present invention is a wastewater treatment system for treating wastewater containing bromine ions, and a reaction tank in which hypochlorous acid is added while acidifying the pH of the wastewater, and downstream of the reaction tank provided, comprising a aeration tank for aerating the treated water from the reaction vessel, the.
本発明に係る排水処理システムにおいて、除去された臭素ガスから臭素をアルカリ溶液によって回収する回収部を更に備え、曝気槽では、回収部によって臭素が回収されたガスを曝気ガスとして用いてよい。回収部は、アルカリ溶液を用いるため、臭素を回収すると同時にガス中のＣＯ The wastewater treatment system according to the present invention may further include a recovery unit that recovers bromine from the removed bromine gas with an alkaline solution, and in the aeration tank, the gas from which bromine has been recovered by the recovery unit may be used as the aeration gas. Since the recovery unit uses an alkaline solution, it recovers bromine and simultaneously removes CO in the gas.
２2
も吸収する。従って、回収部によって臭素が回収されたガスは、ＣＯAlso absorb. Therefore, the gas from which bromine is recovered by the recovery unit is CO 2.
２2
の濃度が低い。曝気槽では、空気に比べ当該ＣＯThe concentration of is low. In the aeration tank, the CO
２2
の濃度が低いガスを曝気ガスとして用いることにより、回収部でのアルカリ損失を抑制することができる。これにより、ランニングコストを低減することができる。By using a gas having a low concentration as the aeration gas, alkali loss in the recovery unit can be suppressed. Thereby, running cost can be reduced.
本発明に係る排水処理システムにおいて、反応槽よりも上流側に設けられ、次亜塩素酸が添加される前の排水のｐＨを酸性に調整するｐＨ調整槽を更に備えてよい。ｐＨ調整に影響を与える因子として、排水に含まれる臭素イオンの量の変動（臭素イオンの量が変動すると次亜塩素酸の添加によるｐＨ上昇の度合い、及び曝気槽での曝気によるｐＨ上昇の度合いが変動する）の他、臭素イオンの量とは関連のない外来因子（排水に含まれる炭酸イオンの量や金属酸化物の量など）がある。一つの槽にて、両方の因子に対応するようにｐＨ調整を行う場合、ｐＨ調整が困難となる。従って、反応槽よりも上流側のｐＨ調整槽にて、次亜塩素酸が添加される前の排水のｐＨ調整を行うことにより、外来因子に対応するためのｐＨ調整を予め行っておくことが可能となる。これによって、反応槽では、排水に含まれる臭素イオンの量の変動のみに対応するためのｐＨ調整を行うことができる。これによって、反応槽でのｐＨ調整を容易に行うことが可能となり、排水に含まれる臭素イオンの量の変動に、より正確に対応することが可能となる。 The wastewater treatment system according to the present invention may further include a pH adjusting tank that is provided upstream of the reaction tank and adjusts the pH of the wastewater before addition of hypochlorous acid to an acidity. Factors affecting pH adjustment include fluctuations in the amount of bromine ions contained in wastewater (the degree of pH increase due to the addition of hypochlorous acid when the amount of bromine ions varies, and the degree of pH increase due to aeration in the aeration tank) There are other external factors that are not related to the amount of bromine ions (such as the amount of carbonate ions and the amount of metal oxides contained in the waste water). When pH adjustment is performed so as to correspond to both factors in one tank, pH adjustment becomes difficult. Therefore, by adjusting the pH of the waste water before hypochlorous acid is added in the pH adjustment tank upstream of the reaction tank, the pH adjustment for dealing with the external factors can be performed in advance. It becomes possible. Thereby, in a reaction tank, pH adjustment for responding only to fluctuations in the amount of bromine ions contained in wastewater can be performed. As a result, it is possible to easily adjust the pH in the reaction tank, and it is possible to more accurately cope with fluctuations in the amount of bromine ions contained in the waste water.
ここで、次亜塩素酸の添加によるｐＨ上昇や、曝気槽で曝気することによる処理水のｐＨ上昇により、反応槽でのｐＨが臭素の遊離反応に適切な値であったとしても、曝気槽の出口側では当該適切な値よりもｐＨが高くなる場合がある。本発明に係る排水処理システムは、曝気槽の出口側の処理水のｐＨを測定するｐＨ測定部を更に備えている。従って、当該ｐＨ測定部の測定結果に基づいて反応槽に添加する酸の量を調整することにより、曝気槽の出口側においてもｐＨを臭素の遊離反応のために適切な値に保つことが可能となる。更に、反応槽に供給される排水の臭素イオンの量が変動した場合は、それに対応してｐＨ測定部の測定結果も変動する。従って、当該変動に応じた量の酸を反応槽に添加することが可能となるため、排水中の臭素イオンの量の変動に関わらず、必要以上の酸が添加されることを防止することができる。また、反応槽に供給される排水の臭素イオンの量が変動した場合は、それに対応して曝気槽の出口側の残留塩素濃度測定部の測定結果も変動する。従って、当該変動に応じた量の次亜塩素酸を反応槽に添加することが可能となるため、排水中の臭素イオンの量の変動に関わらず、必要以上の次亜塩素酸が添加されることを防止することができる。以上によって、含まれる臭素イオンの量の変動によらず、排水を効率良く処理することができる。 Here, even if the pH in the reaction tank is an appropriate value for the bromine release reaction due to the increase in pH due to the addition of hypochlorous acid or the increase in the pH of the treated water by aeration in the aeration tank, the aeration tank On the outlet side, the pH may be higher than the appropriate value. The wastewater treatment system according to the present invention further includes a pH measurement unit that measures the pH of the treated water on the outlet side of the aeration tank. Therefore, by adjusting the amount of acid added to the reaction tank based on the measurement result of the pH measurement section, it is possible to keep the pH at an appropriate value for the bromine liberation reaction at the outlet side of the aeration tank. It becomes. Furthermore, when the amount of bromine ions in the wastewater supplied to the reaction vessel changes, the measurement result of the pH measurement unit also changes accordingly. Accordingly, since it becomes possible to add an amount of acid corresponding to the fluctuation to the reaction tank, it is possible to prevent an excessive amount of acid from being added regardless of fluctuations in the amount of bromine ions in the waste water. it can. In addition, when the amount of bromine ions in the wastewater supplied to the reaction tank varies, the measurement result of the residual chlorine concentration measurement unit on the outlet side of the aeration tank also varies accordingly. Accordingly, since it is possible to add hypochlorous acid in an amount corresponding to the fluctuation to the reaction tank, excessive hypochlorous acid is added regardless of fluctuations in the amount of bromine ions in the waste water. This can be prevented. As described above, wastewater can be treated efficiently regardless of fluctuations in the amount of bromine ions contained.
Claims (3)
前記排水のｐＨを酸性にすると共に次亜塩素酸が添加される反応槽と、
前記反応槽の下流側に設けられ、前記反応槽からの処理水を曝気する曝気槽と、を備える、排水処理システム。 A wastewater treatment system for treating wastewater containing bromine ions,
A reaction vessel in which the pH of the waste water is acidified and hypochlorous acid is added;
A wastewater treatment system comprising: an aeration tank provided on the downstream side of the reaction tank and aerated with the treated water from the reaction tank.
前記曝気槽では、前記回収部によって臭素が回収されたガスを曝気ガスとして用いる、請求項１に記載の排水処理システム。 A recovery unit for recovering bromine from the removed bromine gas with an alkaline solution;
The waste water treatment system according to claim 1, wherein in the aeration tank, a gas from which bromine is recovered by the recovery unit is used as an aeration gas.
前記曝気槽の出口側に設けられ、前記曝気槽の出口側の処理水の残留塩素濃度を測定する残留塩素濃度測定部と、
前記反応槽よりも上流側に設けられ、前記次亜塩素酸が添加される前の前記排水のｐＨを酸性に調整するｐＨ調整槽と、を更に備える、請求項１又は２に記載の排水処理システム。
A pH measurement unit that is provided on the outlet side of the aeration tank and measures the pH of the treated water on the outlet side of the aeration tank;
A residual chlorine concentration measurement unit that is provided on the outlet side of the aeration tank and measures the residual chlorine concentration of the treated water on the outlet side of the aeration tank;
The wastewater treatment according to claim 1, further comprising a pH adjustment tank that is provided upstream of the reaction tank and adjusts the pH of the wastewater before the hypochlorous acid is added to an acidic pH. system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012284703A JP5913087B2 (en) | 2012-12-27 | 2012-12-27 | Wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012284703A JP5913087B2 (en) | 2012-12-27 | 2012-12-27 | Wastewater treatment system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2014124600A JP2014124600A (en) | 2014-07-07 |
| JP2014124600A5 true JP2014124600A5 (en) | 2015-02-26 |
| JP5913087B2 JP5913087B2 (en) | 2016-04-27 |
Family
ID=51404575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012284703A Active JP5913087B2 (en) | 2012-12-27 | 2012-12-27 | Wastewater treatment system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5913087B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019166459A (en) * | 2018-03-23 | 2019-10-03 | 住友重機械エンバイロメント株式会社 | Water treatment device and water treatment method |
| JP7284624B2 (en) * | 2019-04-19 | 2023-05-31 | 住友重機械エンバイロメント株式会社 | Residual chlorine removal method, controller for residual chlorine removal system, and residual chlorine removal system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55154305A (en) * | 1979-05-21 | 1980-12-01 | Mitsubishi Electric Corp | Recovery of bromine from bromine ion-containing waste water |
| JPS58167403A (en) * | 1982-03-30 | 1983-10-03 | Toyo Soda Mfg Co Ltd | Preparation of bromine |
| JPH07171581A (en) * | 1993-12-22 | 1995-07-11 | Fuji Photo Film Co Ltd | Recovery of br2 from waste photographic solution |
| JPH1018071A (en) * | 1996-07-08 | 1998-01-20 | Mitsui Petrochem Ind Ltd | Method for electrolyzing aqueous salt solution |
| JP2006167570A (en) * | 2004-12-15 | 2006-06-29 | Sumitomo Chemical Co Ltd | Method for removing bromine ion in saline solution |
| US8496815B2 (en) * | 2008-09-19 | 2013-07-30 | Iofina Natural Gas, Inc. | Iodine recovery systems |
-
2012
- 2012-12-27 JP JP2012284703A patent/JP5913087B2/en active Active
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