Method for treating raw water containing hardly decomposable substance

A treatment method and a technology that is difficult to decompose. It is applied in the fields of adsorbed water/sewage treatment, light water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems of difficulty in high concentrations, insufficient treatment, and hindering chemical decomposition. achieve high reliability
CN1910116AInactive Publication Date: 2007-02-07IDEMITSU KOSAN CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
IDEMITSU KOSAN CO LTD
Publication Date
2007-02-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for treating a raw water containing a hardly decomposable substance, which comprises the following steps: a step (B) of adding an adsorbing agent to a raw water containing a hardly decomposable substance (a raw water to be treated) to allow said adsorbing agent to adsorb the hardly decomposable substance (an adsorption treatment step), a step (C) of separating a permeated liquid by the use of a filtration film, to concentrate the adsorbing agent having absorbed said hardly decomposable substance (a film filtration treatment step), and (D) a step of chemically decomposing the hardly decomposable substance being adsorbed in the concentrated adsorbing agent by a peroxide, without the operation for desorption from said adsorbing agent (a chemical decomposition step), and, by the above steps, concentrates hardly decomposable substances such as dioxins contained in a contaminated water (the raw water to be treated) and converts the hardly decomposable substances to harmless substances. The above method can be applied also to a raw water containing a reducing substance such as a hydrogensulfite for neutralizing free chlorine, the application thereof is not limited by the properties of hardly decomposable substances being contained, and also it allows conversion of hardly decomposable substances to harmless ones with good efficiency at a low cost.
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Description

Technical field

[0001] The present invention relates to a method for treating water containing hardly decomposable substances such as dioxenes and other endocrine disrupting substances. Background technique

[0002] In 1999, Japan formulated a special treatment method for diene countermeasures. In this special treatment method for diene countermeasures, the emission standard of dienes is set to 10pg-TEQ / L or less. On the other hand, waste water from incinerator disintegration works, industrial waste water discharged from specific facilities, and a part of soil leaching water sometimes contain high concentrations of diolefins that significantly exceed this standard. Therefore, it is very hopeful that developments can be developed to reduce them. Treatment or removal technology.

[0003] In addition, endocrine disrupting substances such as bisphenols (also called environmental hormones and endocrine disrupting chemicals) other than diolefins, and various organic chlorides represent...

Claims

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