Complex system for water treatment, desalination, and chemical material production
US-2020277207-A1 · Sep 3, 2020 · US
Apparatus to remove harmful chemical species from industrial wastewater using iron-based products
US11447405B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11447405-B2 |
| Application number | US-202016875169-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 15, 2020 |
| Priority date | May 15, 2019 |
| Publication date | Sep 20, 2022 |
| Grant date | Sep 20, 2022 |
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- Title
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- Abstract
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Abstract
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A method and apparatus are provided for removing EPA regulated chemical species from industrial wastewater using green rust. The apparatus includes a green rust generator having an iron anode and a carbon cathode.
First claim
Opening claim text (preview).
What is claimed: 1. A method of treating industrial wastewater, comprising: generating green rust by iron electrolysis using an iron anode and a carbon cathode; feeding air to the carbon cathode to support generation of at least one of hydrogen peroxide and hypochlorite at the carbon cathode to lower the overall energy required to generate the green rust; mixing the green rust with the industrial wastewater to react selenium, arsenic and nitrite/nitrate species in the industrial wastewater with the green rust; and solidifying and separating the selenium, arsenic and nitrite/nitrate species from the treated industrial wastewater. 2. The method of claim 1 , including concentrating the green rust prior to the mixing the green rust with the industrial wastewater. 3. The method of claim 2 , including concentrating the green rust in a hydrocyclone before the mixing with the industrial wastewater. 4. The method of claim 3 , including completing the separating of the selenium, arsenic and nitrite/nitrate species from the industrial wastewater in a solid-liquid reactor or separator. 5. The method of claim 4 , adding a modified anionic starch to the solid-liquid reactor or separator, the modified anionic starch functioning as a coagulant to flocculate and settle down fine green rust particles for more efficient separation. 6. The method of claim 1 , including concentrating the green rust prior to the mixing the green rust with the industrial wastewater. 7. The method of claim 6 , including concentrating the green rust in a hydrocyclone before the mixing with the industrial wastewater in a reactor. 8. The method of claim 1 , including completing the separating of the selenium, arsenic and nitrite/nitrate species from the treated industrial wastewater in a solid-liquid reactor or separator. 9. The method of claim 8 , adding a modified anionic starch to the solid-liquid reactor or separator, the modified anionic starch functioning as a flocculant to coagulate and settle down fine green rust particles for more efficient separation. 10. A method of generating green rust by iron electrolysis, comprising: using an iron anode and a carbon cathode; passing a current across the iron anode and the carbon cathode; and feeding air to the carbon cathode to support the generation of at least one of the hydrogen peroxide and hypochlorite; and generating at least one of hydrogen peroxide and hypochlorite at the carbon cathode and thereby lowering overall energy required to generate the green rust.
Assignees
Inventors
Classifications
Selenium compounds · CPC title
Nitrites · CPC title
- C02F1/463Primary
by electrocoagulation · CPC title
Arsenic compounds · CPC title
characterised by the material · CPC title
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Frequently asked questions
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- What does patent US11447405B2 cover?
- A method and apparatus are provided for removing EPA regulated chemical species from industrial wastewater using green rust. The apparatus includes a green rust generator having an iron anode and a carbon cathode.
- Who is the assignee on this patent?
- Univ Kentucky Res Found
- What technology area does this patent fall under?
- Primary CPC classification C02F1/463. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 20 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).