Title:
TREATMENT OF SEWAGE CONTAINING DIOXIN
Document Type and Number:
Japanese Patent JP3963529
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accelerate the decomposition reaction of dioxin by enhancing the generation efficiency of hydroxy free radicals and to reduce pH adjusting cost by treating dioxin-containing sewage with ozone, hydrogen peroxide and ultraviolet rays.
SOLUTION: Ozone 3 for forming active seeds and hydrogen peroxide 4 are supplied to the inlet of a treatment tank 1 and the interior thereof and an ultraviolet lamp 2 necessary for the formation of active seeds and dechlorination reaction of dioxin is disposed in the tank 1. At this time, ozone 3 is supplied to the treatment tank 1 from the lower part thereof as ozone gas and the stirring in the treatment tank is performed by bubbles of the ozone gas. When dioxin-containing sewage such as exuded water of a landfill site or industrial waste water is treated, hydroxy free radicals are formed not only by the dechlorinating reaction of dioxin by ultraviolet rays but also the reaction of ultraviolet rays and hydrogen peroxide and that of ozone and hydrogen peroxide caused by the addition of hydrogen peroxide to accelerate the decomposition of dioxin.
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Inventors:
Sota Nakagawa
Toshihiro Tanaka
Kuzuu
Hiroshi Sakuma
Saburo Ito
Manabu Ikeguchi
Toshihiro Tanaka
Kuzuu
Hiroshi Sakuma
Saburo Ito
Manabu Ikeguchi
Application Number:
JP19013797A
Publication Date:
August 22, 2007
Filing Date:
July 15, 1997
Export Citation:
Assignee:
Ebara Corporation
International Classes:
C02F1/78; A62D3/00; C02F1/32; C02F1/58; C02F1/72; (IPC1-7): C02F1/78; A62D3/00; C02F1/32; C02F1/58; C02F1/72; C02F1/72
Domestic Patent References:
| JP2184393A | ||||
| JP7108285A | ||||
| JP62176595A | ||||
| JP6028883A |
Other References:
川本克也,「ダイオキシン類の分解技術の現状と展望」,公害と対策,1991年,Vol.27,No.7,p.617-627
Attorney, Agent or Firm:
Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Zenichi Soeda
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Zenichi Soeda