# US 10,870,589 B2 · Filtering system for removing chemicals from fluids

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- Number: US 10,870,589 B2
- Document ID: US10870589B2
- Status: Granted
- Kind: B2
- Application number: 15/140,051
- Filed: 2016-04-27
- Published: 2017-11-02
- Granted: 2020-12-22
- Earliest claimed: 2016-04-27
- Applicants: Jan D. Graves; Gregory D. Graves
- Inventors: Jan D. Graves; Gregory D. Graves
- Web page: https://patentgrep.com/patent/US10870589B2

## CPC

- C02F 1/281: {using inorganic sorbents}
- B01D 24/165: {the filtering material being supported by pervious surfaces}
- C02F 1/001: {Processes for the treatment of water whereby the filtration technique is of importance (C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00)}
- C02F 1/006: {Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks (for settling tanks B01D21/24)}
- C02F 1/283: {using coal, charred products, or inorganic mixtures containing them}
- C02F 1/288: {using composite sorbents, e.g. coated, impregnated, multi-layered}
- C02F 1/5245: {using basic salts, e.g. of aluminium and iron}
- B01J 20/08: comprising aluminium oxide or hydroxide; comprising bauxite
- B01J 20/28004: {Sorbent size or size distribution, e.g. particle size}
- B01J 20/28019: {Spherical, ellipsoidal or cylindrical}
- B01J 20/28061: {being in the range 100-500 m2/g}
- C02F 2001/007: {Processes including a sedimentation step}
- C02F 2101/105: {Phosphorus compounds}
- C02F 2103/001: {Runoff or storm water}
- C02F 2103/007: {Contaminated open waterways, rivers, lakes or ponds}
- C02F 2303/16: Regeneration of sorbents, filters
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

A filter system for filtering a fluid stream is disclosed herein. The filter system includes a first fluid passage, a first chamber, a second chamber, an adsorbing media, and a second fluid passage. The first fluid passage is arranged such that a fluid stream can flow through the first fluid passage and into the filter system. The first chamber is arranged to hold suspended or dissolved solids, pollutants, and nutrients that are filtered from the fluid stream. The second chamber is positioned above the first chamber and in fluid communication with the first chamber. The adsorbing media is positioned in the second chamber. The second fluid passage is arranged such that filtered fluid from the fluid stream can flow out of the filtering system through the second fluid passage.

## Claims

### Claim 1

A filtering system for filtering a fluid stream, the filtering system comprising:
a housing comprising:
an external wall;
a top wall;
a bottom wall;
an internal wall adjacently spaced apart from the external wall extending from the top wall to a free edge disposed above the bottom wall;
an influent chamber defined between the internal wall and the external wall;
a rack extending horizontally from the free edge of the internal wall; and
a settling chamber defined between the rack and the bottom wall and in fluid communication with the influent chamber for holding suspended or dissolved solids, pollutants, or nutrients filtered from the fluid stream;
an influent pipe extending through the external wall to an upper portion of the influent chamber through which the fluid stream flows into the housing;
an adsorbent media chamber positioned above the rack and in fluid communication with the settling chamber through the rack;
wherein the rack separates the settling chamber from the adsorbent media chamber;
a filtration media layer positioned in the adsorbent media chamber and on top of the rack;
an adsorbing media layer positioned in the adsorbent media chamber and on top of the filtration media layer; and
an effluent pipe through which fluid filtered by the absorbing media layer flows out of the housing.

### Claim 2 (depends on 1)

The filtering system of claim 1, wherein the adsorbing media layer comprises a phosphorus adsorbing media.

### Claim 3 (depends on 2)

The filtering system of claim 2, wherein the phosphorus-adsorbing media is activated alumina, activated carbon, ceramic particulate media, or combinations thereof.

### Claim 4 (depends on 3)

The filtering system of claim 3, wherein the adsorbing media layer is comprised of spheres between about 1/16 inches in diameter and ½ inches in diameter.

### Claim 5 (depends on 3)

The filtering system of claim 3, wherein the adsorbing media layer is comprised of spheres with a surface area to weight ratio of at least about 300 square meters per gram.

### Claim 6 (depends on 3)

The filtering system of claim 3, wherein the adsorbing media layer is comprised of spheres with a total pore volume of about 0.5 cubic centimeters per gram.

### Claim 7 (depends on 3)

The filtering system of claim 3, further comprising a coating of aluminum sulfate on at least a portion of the adsorbing media.

### Claim 8 (depends on 1)

The filtering system of claim 1, wherein the filtration media layer comprises a first filtration media layer positioned on top of the rack and a second filtration media layer positioned on top of the first filtration media layer.

### Claim 9 (depends on 8)

The filtering system of claim 8, wherein the first filtration media layer is comprised of gravel.

### Claim 10 (depends on 8)

The filtering system of claim 8, wherein the first filtration media layer is comprised of gravel averaging a first diameter and the second filtration media layer is comprised of gravel averaging a second diameter, wherein the first diameter is larger than the second diameter.

### Claim 11 (depends on 1)

The filtering system of claim 1, wherein the influent pipe includes an end terminating in the influent chamber.

### Claim 12 (depends on 1)

The filtering system of claim 1, wherein the effluent pipe is positioned proximate to the top of the filtering system.

### Claim 13 (depends on 12)

The filtering system of claim 12, wherein the effluent pipe extends through a wall of the filtering system.

### Claim 14 (depends on 13)

The filtering system of claim 13, further comprising an influent collection channel with a plurality of apertures in fluid communication with the adsorbent chamber and the effluent pipe.

### Claim 15 (depends on 13)

The filtering system of claim 13, further including a flow equalization device in fluid communication with the effluent pipe and the adsorbent media chamber.

### Claim 16 (depends on 1)

The filtering system of claim 1, further comprising at least one opening in the top of the filtering system to facilitate inspection of an interior of the filtering system.

### Claim 17 (depends on 1)

The filtering system of claim 1, wherein the fluid stream flows through the influent pipe and into the filtering system under the force of gravity.

### Claim 18 (depends on 17)

The filtering system of claim 17, wherein the fluid stream flows through the effluent pipe and out of the filtering system under a hydrostatic force cause by the fluid stream flowing into the filtering system under the force of gravity.

### Claim 19 (depends on 1)

The filtering system of claim 1, wherein the fluid stream flows from the settling chamber vertically though the adsorbent chamber prior to flowing out of the filtering system.

### Claim 20

A method for filtering a fluid stream, the method includes:
providing a filtering system for filtering a fluid stream, the filtering system comprising:
a housing comprising:
an external wall;
a top wall;
a bottom wall;
an internal wall adjacently spaced apart from the external wall extending from the top wall to a free edge disposed above the bottom wall;
an influent chamber defined between the internal wall and the external wall;
a rack extending horizontally from the free edge of the internal wall; and
a settling chamber defined between the rack and the bottom wall and in fluid communication with the influent chamber for holding suspended or dissolved solids, pollutants, or nutrients filtered from the fluid stream;
an influent pipe extending through the external wall to an upper portion of the influent chamber through which the fluid stream flows into the housing;
an adsorbent media chamber positioned above the rack and in fluid communication with the settling chamber through the rack;
wherein the rack separates the settling chamber from the adsorbent media chamber;
a filtration media layer positioned in the adsorbent media chamber and on top of the rack;
an adsorbing media layer positioned in the adsorbent media chamber and on top of the filtration media layer; and
an effluent pipe through which fluid filtered by the absorbing media layer flows out of the housing;
directing a fluid into the influent pipe;
directing fluid from the influent pipe into the settling chamber via the influent chamber;
directing fluid from the settling chamber upwardly through the rack;
directing fluid from the rack upwardly through the filtration media layer;
directing fluid from the filtration media layer upwardly through the absorbing media layer;
directing fluid from the absorbing media layer into the effluent pipe; and
directing fluid from the effluent pipe out of the filtering system.

### Claim 21 (depends on 20)

The method of claim 20, wherein the adsorbing media layer is comprised of phosphorus-adsorbing media for adsorbing phosphorus.

### Claim 22 (depends on 21)

The method of claim 21, wherein the phosphorus-adsorbing media is activated alumina, activated carbon, ceramic particulate media, or combinations thereof.

### Claim 23 (depends on 22)

The method of claim 22, further comprising coating the phosphorus-adsorbing media with aluminum sulfate.

### Claim 24 (depends on 23)

The method of claim 23, wherein coating the phosphorus-adsorbing media with aluminum sulfate includes:
preparing a solution by dissolving aluminum sulfate in water;
treating the phosphorus-adsorbing media in the solution;
removing the phosphorus-adsorbing media from the solution; and
drying the phosphorus-adsorbing media.

### Claim 25 (depends on 22)

The method of claim 22, further comprising holding solids filtered from the fluid stream in the settling chamber.

### Claim 26 (depends on 25)

The method of claim 25, further comprising:
monitoring the settling chamber for an accumulation of solids filtered from the fluid stream; and
removing the accumulated solids from the settling chamber.

### Claim 27 (depends on 26)

The method of claim 26, further comprising flowing a cleaning agent through the phosphorus-adsorbing media.

### Claim 28 (depends on 27)

The method of claim 27, where the cleaning agent is water.

### Claim 29 (depends on 20)

The method of claim 20, wherein the fluid stream enters the influent pipe under the force of gravity.

### Claim 30 (depends on 29)

The method of claim 29, wherein the fluid stream flows out of the housing through the effluent pipe under a hydrostatic force caused by the fluid stream flowing into the effluent pipe under the force of gravity.

### Claim 31 (depends on 20)

The method of claim 20, wherein the fluid stream flows vertically upwardly though the filtering media layer prior to flowing out of the effluent pipe.