Filtration system and method for treating water containing nitrogen and phosphorous compounds

Patent metadata

Field	Value
Publication number	US-2021354109-A1
Application number	US-202117302895-A
Country	US
Kind code	A1
Filing date	May 14, 2021
Priority date	May 15, 2020
Publication date	Nov 18, 2021
Grant date	—

Abstract

A synergistic composition can be used to treat water containing nitrogen compounds and phosphorus compounds. The synergistic composition includes iron filings, clay particles, aluminum particles, and sand particles. The iron filings, clay particles, and aluminum particles act synergistically to remove nitrogen compounds and phosphorus compounds from water. Specifically, the clay particles attract the nitrogen compounds and the phosphorus compounds to be absorbed onto a surface of the iron filings and the clay particles. The aluminum particles react with the nitrogen compounds via an oxidation reaction to form ammonia compounds, and react with the phosphorus compounds to produce aluminum phosphate. As such, the synergistic relationship between the iron filings, clay particles, and aluminum particles remove nitrogen and phosphorus compounds from water and recover the compounds in usable forms, namely, ammonia and aluminum phosphate.

First claim

1 . A filtration system for treating water containing nitrogen compounds and phosphorus compounds, the filtration system comprising:
a media chamber including a homogenously mixed synergistic composition, the homogenously mixed synergistic composition including a mixture of iron filings of between 5 vol % and 7.5 vol %, clay particles of between 2 vol % and 3 vol %, and aluminum particles of between 2.5 vol % and 5 vol %, wherein the clay particles are configured to attract the nitrogen compounds and the phosphorus compounds to be absorbed onto a surface of the iron filings and the clay particles, wherein the aluminum particles are configured to react with nitrogen compounds via an oxidation reaction to form ammonia compounds, thereby synergistically removing the nitrogen compounds from the water within the media chamber, and wherein the aluminum particles react with the phosphorus compounds to produce aluminum phosphate, thereby synergistically removing the phosphorus compounds from the water within the media chamber.

2 . The filtration system of claim 1 , wherein the homogenously mixed synergistic composition further comprises sand particles of between 78 vol % and 85 vol %.

3 . The filtration system of claim 1 , wherein the aluminum particles are aluminum flakes.

4 . The filtration system of claim 1 , wherein the aluminum particles are aluminum powder.

5 . The filtration system of claim 1 , wherein the homogenously mixed synergistic composition further comprises an amount of tire crumb.

6 . The filtration system of claim 5 , wherein the amount of tire crumb is between 7.5 vol % and 10 vol %.

7 . A method of treating water containing nitrogen compounds and phosphorus compounds, the method comprising the steps of:
mixing together a homogenously mixed synergistic composition including iron filings of between 5 vol % and 7.5 vol %, clay particles of between 2 vol % and 3 vol %, and aluminum particles of between 2.5 vol % and 4.5 vol %; flowing water that contains nitrogen compounds and phosphorus compounds through the synergistic composition; attracting, via the clay particles, the nitrogen compounds and the phosphorus compounds; absorbing the nitrogen compounds and the phosphorus compounds onto a surface of the iron filings and the clay particles; via the aluminum particles, removing at least a portion of the nitrogen compounds via an oxidation reaction to form ammonia compounds; and via the aluminum particles, removing at least a portion of the phosphorus compounds to form aluminum phosphate, wherein the iron filings, the clay particles, and the aluminum particles act synergistically to remove the at least the portion of the nitrogen compounds and the phosphorus compounds from the water.

8 . The method of claim 7 , wherein the water is selected from the group consisting of stormwater runoff, wastewater effluent, agricultural discharge, and combinations thereof.

9 . The method of claim 7 , wherein the homogenously mixed synergistic composition further comprises sand particles of between 78 vol % and 85 vol %.

10 . The method of claim 7 , wherein the aluminum particles are aluminum flakes.

11 . The method of claim 7 , wherein the aluminum particles are aluminum powder.

12 . The method of claim 7 , wherein the homogenously mixed synergistic composition further comprises an amount of tire crumb.

13 . The method of claim 12 , wherein the amount of tire crumb is between 7.5 vol % and 10 vol %.

14 . A filtration system for treating water containing nitrogen compounds and phosphorus compounds, the filtration system comprising:
a media chamber including a homogenously mixed synergistic composition, the homogenously mixed synergistic composition including a mixture of iron filings of at least 5 vol %, clay particles of at least 2 vol %, aluminum particles of at least 2.5 vol %, and sand particles of at least 78 vol %, wherein the clay particles are configured to attract the nitrogen compounds and the phosphorus compounds to be absorbed onto a surface of the iron filings and the clay particles, wherein the aluminum particles are configured to react with nitrogen compounds via an oxidation reaction to form ammonia compounds, thereby synergistically removing the nitrogen compounds from the water within the media chamber, and wherein the aluminum particles react with the phosphorus compounds to produce aluminum phosphate, thereby synergistically removing the phosphorus compounds from the water within the media chamber.

15 . The filtration system of claim 14 , wherein the aluminum particles are aluminum flakes.

16 . The filtration system claim 14 , wherein the aluminum particles are aluminum powder.

17 . The filtration system of claim 14 , wherein the homogenously mixed synergistic composition further comprises tire crumb of at least 7.5 vol %.

18 . The filtration system of claim 14 , wherein the iron filings are at most 7.5 vol %.

19 . The filtration system of claim 14 , wherein the clay particles are at most 3 vol %.

20 . The filtration system of claim 14 , wherein the aluminum particles are at most 5 vol %.

Assignees

• Univ Central Florida Res Found Inc

Inventors

• Chang Ni-Bin
• Wanielista Martin P

Classifications

• H05K7/1408

  by a unique member which latches several boards, e.g. locking bars · CPC title

• H05K7/1402

  for securing or extracting printed circuit boards · CPC title

• H05K1/117

  Pads along the edge of rigid circuit boards, e.g. for pluggable connectors · CPC title

• H05K3/368

  parallel to each other (H05K3/361 takes precedence) · CPC title

• G06F1/185

  Mounting of expansion boards · CPC title