Title:
DEVICE FOR COLLECTION AND RECOVERY OF NITROGEN AND PHOSPHORUS NUTRIENTS AND ITS APPLICATION IN PURIFICATION OF AGRICULTURAL DRAINAGE
Document Type and Number:
WIPO Patent Application WO/2022/267649
Kind Code:
A3
Abstract:
A device for collection and recovery of nitrogen and phosphorus nutrients and its application, belonging to the technical field of environmental protection. The device is a filter screen comprising a filler layer comprising at least one filler unit bag(l) consisting of a water-permeable mesh bag(l 1) filled with a composite filler, an outer anchor buckle(13) and a zipper(12); a fixing layer, the filler layer and the fixing layer are detachably arranged from top to bottom, and the fixing layer comprises a fixing grid(2) comprising a thick grid twine(21) and a first fine grid twine(22), wherein the thick grid twine(21) is arranged as the frame of the fixing grid(2), and the thick grid twine(21) and the first fine grid twine(22) are crosswise arranged. The device is used to intercept and purify nitrogen and phosphorus pollutants in farmland drainage water. It has good effects and can directly realize recycling.
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Inventors:
YANG LONG (CN)
Application Number:
PCT/CN2022/087614
Publication Date:
January 19, 2023
Filing Date:
April 19, 2022
Export Citation:
Assignee:
CHINA URBAN CONSTRUCTION DESIGN & RES INSTITUTE CO LTD (CN)
International Classes:
C02F3/34
Foreign References:
| CN113863335A | 2021-12-31 | |||
| CN110002668A | 2019-07-12 | |||
| CN110482700A | 2019-11-22 | |||
| CN103833184A | 2014-06-04 | |||
| CN109553191A | 2019-04-02 | |||
| AU2020103389A4 | 2021-01-28 |
Attorney, Agent or Firm:
BEIJING RISINGMARK INTELLECTUAL PROPERTY AGENCY (CN)
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