The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2020
Filed:
Oct. 19, 2015
Clean Water Services, Hillsboro, OR (US);
Kenneth J. Williamson, Hillsboro, OR (US);
Jamie Hughes, Hillsboro, OR (US);
David Austin, Mendota Heights, MN (US);
Scott Wallace, Raleigh, NC (US);
CLEAN WATER SERVICES, Hillsboro, OR (US);
Abstract
A low energy nitrogen removal wetland system is disclosed to provide high rates of nitrogen removal treatment for wastewater with low energy requirements. The wetland system uses down-flow rock-filled wetlands for nitrogen removal. The system has no aeration requirements, thus resulting in low energy consumption. The wetland system comprises a first column receiving drainage influent, a mid-level reservoir, a second column receiving drainage from the mid-level reservoir and a lower level reservoir receiving discharge from the second column. The first and the second columns are filled with media layers comprise rock media with ammonia adsorption capacity for ammonia removal. The wetland system operates in a flood and drain operation mode or a continuous flow mode.