Passive nutrient removal material mixes

Liquid purification or separation – Processes – Treatment by living organism

Reexamination Certificate

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C210S679000, C210S691000

Reexamination Certificate

active

07824551

ABSTRACT:
Materials, compositions, substances and methods and systems for stormwater treatment in wet ponds, dry ponds and a green roof system. A first embodiment provides in-situ treatment unit within the retention pond by withdrawing the stored stormwater to circulate the stored stormwater into the in-situ treatment unit to sorb nitrogen from the stored stormwater. A second embodiment provides uses a riprap apron, a perforated riser located at the bottom of the riprap apron and a geotextile media encased in a sorption media jacket around the perforated riser. A third embodiment provides a green roof stormwater treatment system that includes protection for waterproofing and insulating the roof, a pollution control media layer for filtration and sorption of solids and dissolved materials found in stormwater, a growing media for growing vegetation, and a cistern to store the runoff stormwater between irrigation events. The green roof system includes recycling runoff stormwater by irrigating the green roof with the stored stormwater.

REFERENCES:
patent: 3771653 (1973-11-01), Harnett
patent: 4073753 (1978-02-01), Hauge
patent: 4172031 (1979-10-01), Hall et al.
patent: 4302337 (1981-11-01), Larson et al.
patent: 4662900 (1987-05-01), Ottengraf
patent: 5897946 (1999-04-01), Nachtman et al.
patent: 2006/0060523 (2006-03-01), Kerns
patent: 2007/0267346 (2007-11-01), Sengupta et al.

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