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Water treatment method and water treatment system
US2018029907A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018029907-A1 |
| Application number | US-201615550829-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 10, 2016 |
| Priority date | Dec 22, 2015 |
| Publication date | Feb 1, 2018 |
| Grant date | — |
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Abstract
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A water treatment method according to the present invention is a water treatment method in which oil is membrane-separated from water to be treated containing the oil and ferrous ions, the water treatment method including an oxidation step of oxidizing the ferrous ions in the water to be treated, and a filtration step of membrane-filtering the water to be treated after the oxidation step. In the oxidation step, a pH of the water to be treated is adjusted to 6 to 9, and an oxidation-reduction potential of the water to be treated is adjusted to 450 to 750 mV.
First claim
Opening claim text (preview).
1 : A water treatment method in which oil is membrane-separated from water to be treated containing the oil and ferrous ions, the water treatment method comprising: an oxidation step of oxidizing the ferrous ions in the water to be treated; and a filtration step of membrane-filtering the water to be treated after the oxidation step, wherein, in the oxidation step, a pH of the water to be treated is adjusted to 6 to 9, and an oxidation-reduction potential of the water to be treated is adjusted to 450 to 750 mV. 2 : The water treatment method according to claim 1 , wherein, in the oxidation step, ozone, chlorine, hydrogen peroxide, or hypochlorous acid is brought into contact with the water to be treated. 3 : The water treatment method according to claim 1 , further comprising an aeration step of aerating the water to be treated after the oxidation step. 4 : The water treatment method according to claim 3 , wherein the aeration is performed by using air or nitrogen gas. 5 : The water treatment method according to claim 3 , wherein, in the aeration step, the pH of the water to be treated is adjusted to 6 to 9, and the oxidation-reduction potential of the water to be treated is adjusted to 0 to 300 mV. 6 : A water treatment system in which oil is membrane-separated from water to be treated containing the oil and ferrous ions, the system comprising: oxidation equipment configured to oxidize the ferrous ions in the water to be treated; and a filtration apparatus configured to membrane-filter the water to be treated which has been oxidized, wherein the oxidation equipment has a mechanism to adjust a pH of the water to be treated to 6 to 9 and an oxidation-reduction potential of the water to be treated to 450 to 750 mV.
Assignees
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Classifications
by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)} · CPC title
Feed pretreatment · CPC title
Oxidation reduction potential [ORP] · CPC title
Removal of treatment agents after treatment · CPC title
- C02F1/78Primary
with ozone {(C02F1/4672 takes precedence)} · CPC title
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- What does patent US2018029907A1 cover?
- A water treatment method according to the present invention is a water treatment method in which oil is membrane-separated from water to be treated containing the oil and ferrous ions, the water treatment method including an oxidation step of oxidizing the ferrous ions in the water to be treated, and a filtration step of membrane-filtering the water to be treated after the oxidation step. In th…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification C02F1/78. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Feb 01 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).