Compositions and methods for treating water

Patent metadata

Field	Value
Publication number	US-9943541-B2
Application number	US-201615543123-A
Country	US
Kind code	B2
Filing date	Jan 12, 2016
Priority date	Jan 13, 2015
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A method of treating water to reduce or prevent bacterial infection in an aquatic organism may include administering a particulate kaolin clay to the water in a dosage sufficient to reduce the presence of at least one undesirable bacterial species present in the water, wherein the particulate kaolin clay has at least one property selected from: (a) a BET surface area of at least about 25 m 2 /g; (b) a particle size distribution such that at least about 80% by weight of the particles of kaolin clay have an equivalent spherical diameter of less than 2 microns as measured by Sedigraph; and (c) a particle size distribution such that at least about 25% by weight of the particles of kaolin clay have an equivalent spherical diameter of less than 0.25 microns as measured by Sedigraph. The method may further include contacting an aquatic organism with the treated water.

First claim

What is claimed is:

1. A method of treating water to reduce or prevent bacterial infection in a fish, the method comprising:
administering a particulate kaolin clay to the water in a dosage sufficient to reduce the presence of at least one undesirable bacterial species present in the water;
wherein the particulate kaolin clay comprises:
(a) a BET surface area ranging from about 25 m 2 /g to about 40 m 2 /g;
(b) a particle size distribution such that at least about 80% by weight of the particles of kaolin clay have an equivalent spherical diameter of less than 2 microns as measured by Sedigraph; and
(c) a particle size distribution such that at least about 50% by weight of the particles of kaolin clay have an equivalent spherical diameter of less than 0.25 microns as measured by Sedigraph; and

contacting a fish with the water,
wherein the particulate kaolin clay is administered to the water at a dosage ranging from about 0.01 g/L to about 3 g/L,
wherein the shape factor of the kaolin clay multiplied by the percentage by weight of the particles of kaolin clay having an equivalent spherical diameter of less than 0.25 microns as measured by Sedigraph has a valve of at least about 1000, and
wherein the specific surface area of the kaolin clay multiplied by the percentage by weight of the particles of kaolin clay having an equivalent spherical diameter of less than 0.25 microns as measured by Sedigraph has a value of at least about 600.

2. The method of claim 1 , wherein the particulate kaolin clay has a particle size distribution such that at least about 85% by weight of the particles of kaolin clay have an equivalent spherical diameter of less than 2 microns as measured by Sedigraph.

3. The method of claim 1 , wherein the particulate kaolin clay has a particle size distribution such that at least about 90% by weight of the particles of kaolin clay have an equivalent spherical diameter of less than 2 microns as measured by Sedigraph.

4. The method of claim 1 , wherein specific surface area of the kaolin clay multiplied by the percentage by weight of the particles of kaolin day having an equivalent spherical diameter of less than 0.25 microns as measured by Sedigraph has a value of at least about 1000.

5. The method of claim 1 , wherein the particulate kaolin clay is administered to the water at a dosage ranging from about 0.1 g/L to about 0.8 g/L.

6. The method of claim 1 , wherein the particulate kaolin clay includes not more than 0.1% by weight dispersant.

7. The method of claim 1 , wherein the at least one undesirable bacterial species includes Flavobacterium columnare.

8. The method of claim 1 , wherein the fish is selected from catfish, tilapia, carp, salmon, sea bass, eels, mullet, bream, amberjack, grouper, perch, trout, sturgeon, or turbot.

9. The method of claim 1 , wherein the kaolin is a sedimentary kaolin.

Assignees

• Imerys Pigments Inc
• Imerys Usa Inc

Inventors

• Biza Peter
• Jones Philip J

Classifications

• B01J20/28004

  Sorbent size or size distribution, e.g. particle size · CPC title

• A61K9/0095

  Drinks; Beverages; Syrups; Compositions for reconstitution thereof, e.g. powders or tablets to be dispersed in a glass of water; Veterinary drenches (A61K9/0007 takes precedence; eatable gels or foams A61K9/0056; oral mucosa adhesive forms A61K9/006) · CPC title

• B01J20/28059

  being less than 100 m2/g · CPC title

• C02F1/281

  using inorganic sorbents · CPC title

• B01J20/12

  Naturally occurring clays or bleaching earth · CPC title