High permeability media mix (HPMM) for phosphorous and nitrogen removal from contaminated waters

Patent metadata

Field	Value
Publication number	US-11298680-B2
Application number	US-201716324999-A
Country	US
Kind code	B2
Filing date	Aug 14, 2017
Priority date	Aug 12, 2016
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A retention media for removing substances from water that includes an aggregate; at least one granular adsorbing material capable of adsorbing nutrients and metals; and a psyllium, wherein the psyllium performs as a binder to adhere the at least one granular adsorbing material to the aggregate to form a high permeability media mix is disclosed. A method of manufacturing a media mix is disclosed that includes creating a dry mixture of aggregate, at least one granular absorbing material, and a psyllium; and saturating the dry mixture with water to create a bond between the at least one granular absorbing material, and the aggregate via the psyllium thereby forming a high permeability media mix (HPMM). A method of using a media mix to reduce concentration of substances in water includes installing materials over granular adsorbing material, aggregate; and psyllium to reduce concentration of phosphorous or nitrogen or metals in the water.

First claim

What is claimed is:

1. A retention media for removing substances from water, comprising:
an aggregate selected from the group consisting of expanded shale, expanded clay, expanded slate, stone, zeolite, slag, and combinations thereof;
at least one adsorbing material capable of adsorbing nutrients and metals; wherein the at least one adsorbing material comprises a material having a chemical composition enabling the at least one adsorbing material to act through one of ligand exchange or ion exchange or hydrogen bonding or hydrophobic partitioning or combinations thereof; and
psyllium , as a binding material, wherein the binding material acts as a binder to adhere the at least one adsorbing material to the aggregate to form a high permeability media mix
wherein the at least one adsorbing material is selected from the group consisting of water treatment residual (WTR), zeolite, activated carbon, aluminum-containing adsorbent compounds, iron-containing adsorbent compounds, and combinations thereof.

2. The retention media according to claim 1 wherein the psyllium , when activated by water, forms a gelatinous mass which acts as a binder to adhere the at least one adsorbing material to the aggregate.

3. The retention media according to claim 2 , wherein the content of the psyllium is 0.8%-1.2%.

4. The retention media of claim 2 , wherein the aggregate, the at least one adsorbing material, the psyllium , and the water are mixed by hand or in a device capable of blending the retention media.

5. The retention media of claim 4 , further comprising a permeable pavement surface located above said retention media, wherein said retention media is configured to remove substances from water that enters said retention media through said permeable pavement surface.

6. The retention media of claim 4 , wherein the retention media is placed in an infiltration trench exposed to meteorological events to remove substances from water.

7. The retention media according to claim 1 , wherein the aggregate is expanded shale, and the at least one adsorbing material is an aluminum-containing absorbent compound.

8. The retention media of claim 7 , wherein the at least one adsorbing material includes iron.

9. The retention media according to claim 1 , wherein the aggregate is expanded shale, the at least one adsorbing material is water treatment residual, and the binding material is psyllium.

10. The retention media according to claim 9 , wherein the at least one adsorbing material includes activated carbon.

11. The retention media according to claim 9 , wherein the at least one adsorbing material includes zeolite.

12. The retention media according to claim 9 , wherein content of the WTR is 5%-15%.

13. The retention media according to claim 9 , wherein the psyllium content is 0.8%-1.2%.

14. The retention media according to claim 1 , wherein the at least one adsorbing material is a material having a chemical composition enabling the at least one adsorbing material to remove from water one of phosphorous species or nitrogen species or heavy metals or combinations thereof.

15. The retention media of claim 1 , wherein the aluminum-containing adsorbent compounds are selected from alum, aluminum oxides, aluminum hydroxides, aluminum chlorides, or combinations thereof.

Assignees

• Univ Maryland
• Paverguide Inc

Inventors

• Davis Allen P
• Ostrom Travis
• White Charles

Classifications

• C02F2103/001

  Runoff or storm water · CPC title

• B01J20/28016

  Particle form · CPC title

• B01J20/3028

  Granulating, agglomerating or aggregating · CPC title

• B01J20/02

  comprising inorganic material · CPC title

• B01J20/12

  Naturally occurring clays or bleaching earth · CPC title