JP2017225924A5 - - Google Patents
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- JP2017225924A5 JP2017225924A5 JP2016123176A JP2016123176A JP2017225924A5 JP 2017225924 A5 JP2017225924 A5 JP 2017225924A5 JP 2016123176 A JP2016123176 A JP 2016123176A JP 2016123176 A JP2016123176 A JP 2016123176A JP 2017225924 A5 JP2017225924 A5 JP 2017225924A5
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- JP
- Japan
- Prior art keywords
- aqueous solution
- supply
- reaction
- supplying
- reducing agent
- Prior art date
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- 239000007864 aqueous solution Substances 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000006722 reduction reaction Methods 0.000 claims description 9
- -1 nitrate ions Chemical class 0.000 claims description 8
- 239000003638 reducing agent Substances 0.000 claims description 8
- 229940006477 nitrate ion Drugs 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 3
- 238000001816 cooling Methods 0.000 claims 1
- 150000002500 ions Chemical class 0.000 claims 1
- 230000001678 irradiating Effects 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
Description
上記目的を達成するため、請求項1に記載の排水処理方法の発明では、少なくとも硝酸イオンを含有する水溶液を反応槽(200)に供給する水溶液供給工程と、反応槽への水溶液の供給時、あるいは反応槽への水溶液の供給後の少なくとも何れかに、硝酸イオンの還元反応に用いられる還元剤を水溶液に1回あるいは複数回に分けて供給する還元剤供給工程と、反応槽への水溶液の供給完了後、あるいは供給完了前に、反応槽の水溶液に還元剤の存在下で紫外線照射装置から紫外線を照射して硝酸イオンの還元反応を進行させる硝酸イオン低減工程と、硝酸イオンの還元反応によって水溶液の硝酸イオン濃度が低減した後、反応槽から水溶液を排出する水溶液排出工程とを備え、水溶液供給工程、還元剤供給工程、硝酸イオン低減工程および水溶液排出工程を繰り返し行うことが可能であり、紫外線照射装置は、ランプ部(207a)と、ランプ部を収容するケース部(207b)とを有し、ケース部の内部には媒体が流通してランプ部を冷却することを特徴としている。 In order to achieve the above object, in the invention of the wastewater treatment method according to claim 1, an aqueous solution supplying step of supplying an aqueous solution containing at least nitrate ions to the reaction vessel (200), and at the time of supplying the aqueous solution to the reaction vessel, Alternatively, a reducing agent supplying step for supplying the reducing agent used for the reduction reaction of nitrate ions to the aqueous solution once or a plurality of times at least after supply of the aqueous solution to the reaction vessel, and the aqueous solution to the reaction vessel After the supply is completed or before the supply is completed, the aqueous solution in the reaction vessel is irradiated with ultraviolet rays from an ultraviolet irradiation device in the presence of a reducing agent to promote the reduction reaction of nitrate ions, and the reduction reaction of nitrate ions An aqueous solution discharge step of discharging the aqueous solution from the reaction tank after the nitrate ion concentration of the aqueous solution is reduced, and an aqueous solution supply step, a reducing agent supply step, a nitrate ion reduction step, and Ri can der repeating the solution discharge step, the ultraviolet irradiation apparatus, a lamp unit and (207a), the case portion for storing the lamp unit and has a (207b), medium is circulated inside the casing section The lamp part is cooled .
Claims (1)
前記反応槽への前記水溶液の供給時、あるいは前記反応槽への前記水溶液の供給後の少なくとも何れかに、硝酸イオンの還元反応に用いられる還元剤を前記水溶液に1回あるいは複数回に分けて供給する還元剤供給工程と、
前記反応槽への前記水溶液の供給完了後、あるいは供給完了前に、前記反応槽の前記水溶液に前記還元剤の存在下で紫外線照射装置から紫外線を照射して硝酸イオンの還元反応を進行させる硝酸イオン低減工程と、
前記硝酸イオンの還元反応によって前記水溶液の硝酸イオン濃度が低減した後、前記反応槽から前記水溶液を排出する水溶液排出工程とを備え、
前記水溶液供給工程、前記還元剤供給工程、前記硝酸イオン低減工程および前記水溶液排出工程を繰り返し行うことが可能であり、
前記紫外線照射装置は、ランプ部(207a)と、前記ランプ部を収容するケース部(207b)とを有し、前記ケース部の内部には媒体が流通して前記ランプ部を冷却する排水処理方法。 An aqueous solution supplying step of supplying an aqueous solution containing at least nitrate ions to the reaction vessel (200);
At least one of the reducing agent used for the reduction reaction of nitrate ions at the time of supplying the aqueous solution to the reaction vessel or after the supply of the aqueous solution to the reaction vessel is divided into the aqueous solution once or plural times. A reducing agent supply step to supply,
Nitric acid that proceeds after the completion of the supply of the aqueous solution to the reaction tank or before the completion of the supply, by irradiating the aqueous solution of the reaction tank with ultraviolet rays from an ultraviolet irradiation device in the presence of the reducing agent to advance the reduction reaction of nitrate ions. An ion reduction process;
An aqueous solution discharge step of discharging the aqueous solution from the reaction tank after the nitrate ion concentration of the aqueous solution is reduced by the reduction reaction of the nitrate ions,
The aqueous solution supplying step, the reducing agent supplying step, Ri can der repeatedly performing the nitrate ion reduction step and the solution discharge step,
The ultraviolet irradiation device has a lamp part (207a) and a case part (207b) for housing the lamp part, and a wastewater treatment method for cooling the lamp part by circulating a medium inside the case part. .
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016123176A JP6645367B2 (en) | 2016-06-22 | 2016-06-22 | Wastewater treatment method |
PCT/JP2017/019293 WO2017221619A1 (en) | 2016-06-22 | 2017-05-24 | Effluent treatment method and effluent treatment apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016123176A JP6645367B2 (en) | 2016-06-22 | 2016-06-22 | Wastewater treatment method |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2017225924A JP2017225924A (en) | 2017-12-28 |
JP2017225924A5 true JP2017225924A5 (en) | 2018-09-13 |
JP6645367B2 JP6645367B2 (en) | 2020-02-14 |
Family
ID=60784307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2016123176A Active JP6645367B2 (en) | 2016-06-22 | 2016-06-22 | Wastewater treatment method |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP6645367B2 (en) |
WO (1) | WO2017221619A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3368682B2 (en) * | 1994-09-14 | 2003-01-20 | 東陶機器株式会社 | Septic tank and its operation method |
JP4203571B2 (en) * | 1996-11-09 | 2009-01-07 | 株式会社ムサシノキカイ | Detoxification equipment for organochlorine substances |
JP2000189953A (en) * | 1998-12-24 | 2000-07-11 | Toshiba Lighting & Technology Corp | Photochemical reactor |
JP2000257133A (en) * | 1999-03-09 | 2000-09-19 | Nkk Corp | Small scale washing toilet |
JP2002263687A (en) * | 2001-03-14 | 2002-09-17 | Ebara Corp | Biological treatment method and equipment for organic sewage by circulation type nitrification and denitrification method |
JP4162453B2 (en) * | 2002-09-04 | 2008-10-08 | 三洋電機株式会社 | Water treatment equipment |
JP2005017098A (en) * | 2003-06-26 | 2005-01-20 | Hitachi Ltd | Water quality measuring method and water quality measuring system |
JP2008076253A (en) * | 2006-09-21 | 2008-04-03 | Mitsubishi Heavy Ind Ltd | Selenium analyzer and selenium fractional determination method |
JP5300827B2 (en) * | 2010-11-18 | 2013-09-25 | 株式会社東芝 | Biological wastewater treatment equipment |
JP2014030803A (en) * | 2012-08-04 | 2014-02-20 | Hikari Engineering Co Ltd | Reduction/decomposition method of nitrate ion and nitrite ion |
-
2016
- 2016-06-22 JP JP2016123176A patent/JP6645367B2/en active Active
-
2017
- 2017-05-24 WO PCT/JP2017/019293 patent/WO2017221619A1/en active Application Filing
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