JPH04358593A - Removing apparatus for musty odor substance from water - Google Patents

Abstract

PURPOSE:To provide an apparatus capable of removing musty odor substances and facilitating its maintenance. CONSTITUTION:An apparatus has and anode chamber 3 and a cathode chamber 4 partitioned by an electrolytic diaphragm 2 and an electrolytic bath 1 consisting of the anode chamber 3 and the cathode chamber 4 filled with porous electrode bodies. The electrode bodies are made of a porous material and the anode chamber 5 and the cathode chamber 6 are filled with the electrode bodies, so that the possibility that active chemical species produced on the surface of the electrodes at the time of electrolysis of water and musty odor substances in water contact each other is increased and the musty odor substances become easy to be decomposed. Since an electrolytic method is applied, the maintenance of the apparatus is easy.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing musty-smelling substances from water.

0002

BACKGROUND OF THE INVENTION In recent years, musty odor in tap water has become a major problem in tap water sourced from highly eutrophic lakes and marshes. Diosmin and 2-methylisoborneol, which are produced from actinomycetes, blue-green algae, and the like, have been confirmed as musty substances that cause this musty odor. Various studies have been conducted on the removal of this musty odor by household water purifiers, but some problems remain unsolved. For example, in a method using an adsorbent such as activated carbon, the adsorption capacity decreases with use, so there is a maintenance problem in that the adsorbent must be replaced frequently. Furthermore, a method disclosed in JP-A No. 61-204082 in which an anode and a cathode are made of a specific metal material and a current is passed through these two electrodes to electrolyze and remove organic substances in water is based on trihalomethane. Although it is effective in decomposing and removing organic halogen compounds such as, it is difficult to decompose and remove diosmin and 2-methylisoborneol, which are musty odor substances.

0003

[Problems to be Solved by the Invention] In view of the above circumstances, an object of the present invention is to provide a device for removing moldy smelling substances from water, which can be used at home and which can remove moldy smelling substances from tap water and is easy to maintain. It is in.

0004

[Means for Solving the Problems] The present invention provides an underwater solution having an electrolytic cell in which an anode chamber and a cathode chamber are separated by an electrolytic diaphragm, and the anode chamber and the cathode chamber are filled with a porous electrode body. This is a musty odor removal device.

[0005] The inventors discovered that the musty-smelling substance in water is not decomposed even when an electric current is passed through the solution, but it is easily oxidized and decomposed by adding a strong oxidizing agent such as ozone into the electrolytic cell and electrolyzing it. In addition, it is assumed that many elementary reactions such as the generation of ozone occur on the electrode surface when water is electrolyzed, so by increasing the surface area of the electrode, active chemical species such as ozone generated on the electrode surface can be This invention was completed as a result of research based on the idea that by increasing the probability of contact with musty-smelling substances, the same effect as when adding a strong oxidizing agent such as ozone to the electrolytic cell could be obtained.

The electrolytic diaphragm of the present invention is a diaphragm that divides an electrolytic cell into an anode chamber and a cathode chamber, and is installed to prevent the anode body and the cathode body from coming into contact with each other, and is exemplified by unglazed ceramics.

[0007] The porous electrode body of the present invention is an electrode body having a sponge-like or mesh-like shape, and the degree of porosity thereof is 90 to 98% as calculated using Equation 1 below. It is desirable that The reason is 90
If the porosity is less than 98%, the amount of water that can be injected into the anode chamber or cathode chamber filled with the electrode body will be small, resulting in poor decomposition and removal efficiency of musty-smelling substances, and if the porosity exceeds 98%, the strength will be weak. This is because a problem arises in that it becomes difficult to maintain the shape of the electrode body.

[0008]

[Math 1]

The materials forming the anode and cathode bodies of the present invention are not particularly limited, but are preferably materials that have excellent conductivity and do not dissolve into water as ions, such as platinum, gold, Applicable materials include silver, nickel, stainless steel, iron, copper, and carbon.

0010

[Operation] In this invention, an electric current is passed through water in which musty-smelling substances are dissolved to electrolyze the water.
, H2 , HO2 − , H+ , O2 , O3 ,
It is thought that active chemical species effective for decomposing musty-smelling substances such as H2O2 and OH radicals are generated on the electrode surface, and these active chemical species react with musty-smelling substances in water to decompose the musty-smelling substances. In this invention, the electrode body is made of a porous material and the anode chamber and the cathode chamber are filled with this porous electrode body. −, H+, O2, O
3. It increases the probability that active species such as H2O2 and OH radicals will come into contact with musty odor substances in water.
It is thought that it has the effect of making it easier to decompose musty-smelling substances.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on embodiments shown in the drawings.

FIG. 1 is a sectional view schematically showing an embodiment of the apparatus for removing musty-smelling substances from water according to the present invention. In Figure 1, the central part of electrolytic cell 1 with a capacity of 300 cc has a diameter of 30 m.
A cylindrical unglazed electrolytic diaphragm 2 having a thickness of 3 mm and a thickness of 3 mm is provided, and the electrolytic cell 1 is partitioned into an anode chamber 3 and a cathode chamber 4 by the electrolytic diaphragm 2. Anode chamber 3 inside electrolytic diaphragm 2
is filled with an anode body 5 made of mesh-like glassy carbon with a porosity of 97%, and the cathode chamber 4 outside the electrolytic diaphragm 2 is filled with a cathode body 6 made of mesh-like platinum with a porosity of 90%. The body 5 and the cathode body 6 are connected to a power source 11 via a constant current device 10.

The operation of the apparatus for removing musty-smelling substances from water according to the present invention will be explained next. The water to be treated is supplied from the raw water supply port 8 and injected into the anode chamber 3 and the cathode chamber 4. The injected water to be treated permeates through the pores of the porous electrode body and enters the anode chamber 3.
and fills the cathode chamber 4. Power supply 1 to electrolytic tank 1 filled with water
1, a current is passed through a constant current device 10 to electrolyze water and decompose musty-smelling substances. The conditions for this electrolysis are not particularly limited, but if a current of 1 to 10,000 A/m2 is passed at a voltage of 1 to 100 V, the musty-smelling substance will be decomposed and removed. Water from which musty-smelling substances have been decomposed and removed in the anode chamber 3 and the cathode chamber 4 passes through the lower part of the electrolytic cell, is stored in a water storage tank 7, and is supplied from a treated water outlet 9.

When raw water containing 50 ppt of 2-methylisoborneol was treated with the above apparatus, the content could be reduced to 10 ppt.

[0015]

According to the apparatus for removing musty-smelling substances in water according to the present invention, it has become possible to decompose and remove musty-smelling substances in water that could not be decomposed and removed by conventional electrolytic methods. Furthermore, since the device for removing musty-smelling substances in water according to the present invention uses an electrolytic method, there are no maintenance problems such as replacing the adsorbent.

[Brief explanation of drawings]

FIG. 1 is a sectional view schematically showing a device for removing musty-smelling substances in water according to an embodiment of the present invention.

[Explanation of symbols]

1 Electrolytic cell 2 Electrolytic diaphragm 3 Anode chamber 4 Cathode chamber 5 Anode body 6 Cathode body

Claims (1)

[Claims] 1. An apparatus for removing musty odor substances in water, comprising an electrolytic cell in which an anode chamber and a cathode chamber are separated by an electrolytic diaphragm, and the anode chamber and the cathode chamber are filled with a porous electrode body.