System for preventing and controlling heavy metals and method for preventing and controlling heavy metals using the same
US11174182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2018 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Dec 12, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
It discloses a system for controlling heavy metals and a method for preventing and controlling heavy metals using the same. The system includes a constructed wetland (3), in which several layers of fillers are laid, so that water is allowed to flow through each layer of the filler to remove heavy metals. Preferably, a sandwich wall is constructed around the constructed wetland (3), and organic matters (12) which generating heat through fermentation is filled in the sandwich wall to supply heat to the constructed wetland (3) in winter. The sandwich wall is easy to build and the fermentation materials are cheap and easily available, thereby the present method is able to effectively solve the difficulties occurred in the operation of constructed wetland in winter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.