Keshav G Das

US Patent:

8302346, Nov 6, 2012

Filed:

Jan 26, 2011

Appl. No.:

13/014464

Inventors:

Ryan W. Hunt - Athens GA, US
Senthil Chinnasamy - Chennai, IN
Keshav C. Das - Athens GA, US
Erico Rolim de Mattos - Athens GA, US

Assignee:

University of Georgia Research Foundation, Inc. - Athens GA

International Classification:

A01G 7/04

US Classification:

47 581LS, 47 13, 47DIG 6

Abstract:

Biological optimization systems for enhancing photosynthetic efficiency and methods of use. Specifically, methods for enhancing photosynthetic efficiency including applying pulsed light to a photosynthetic organism, using a chlorophyll fluorescence feedback control system to determine one or more photosynthetic efficiency parameters, and adjusting one or more of the photosynthetic efficiency parameters to drive the photosynthesis by the delivery of an amount of light to optimize light absorption of the photosynthetic organism while providing enough dark time between light pulses to prevent oversaturation of the chlorophyll reaction centers are disclosed.

US Patent:

20100267122, Oct 21, 2010

Filed:

Apr 8, 2010

Appl. No.:

12/756371

Inventors:

Senthil Chinnasamy - Athens GA, US
Ashish Bhatnagar - Ajmer, IN
Ryan W. Hunt - Athens GA, US
Ronald Claxton - Athens GA, US
Mark Marlowe - Dalton GA, US
Keshav C. Das - Athens GA, US

International Classification:

C12N 1/12

US Classification:

4352573, 4352571, 4352575

Abstract:

The disclosure encompasses, among other aspects, mixed algal populations able to survive and proliferate on culture media that have a high proportion of carpet industry wastewater. Embodiments further encompass methods of cultivating mixed populations of freshwater and marine alga comprising a plurality of genera and species to provide a biomass from which may be extracted lipids, or converted into biodiesel by such procedures as pyrolysis. Lipid material extracted from the algae may be converted to biodiesel or other organic products. A combined stream of carpet industry untreated wastewater with 10-15% sewage was found to be a good growth medium for cultivation of microalgae and biodiesel production. Native algal strains were isolated from carpet wastewater inoculated with mixed populations derived from environments exposed to such wastewater. Both fresh water and marine algae showed good growth in wastewaters. About 65% of the algal oil obtained from the algal consortium cultured on carpet industry wastewater could be converted into biodiesel.

US Patent:

20110045556, Feb 24, 2011

Filed:

Aug 24, 2010

Appl. No.:

12/862246

Inventors:

Keshav C. Das - Athens GA, US
Senthil Chinnasamy - Tamilnadu, IN
James Shelton - Athens GA, US
Susan B. Wilde - Watkinsville GA, US
Rebecca S. Haynie - Carlton GA, US
James A. Herrin - Atlanta GA, US

International Classification:

C12P 7/64
C12N 1/12

US Classification:

435134, 4352571

Abstract:

Embodiments of the present disclosure provide for novel strategies to harvest algal lipids using mollusks which after feeding algae from the growth medium can convert algal lipids into their biomass or excrete lipids in their pseudofeces which makes algae harvesting energy efficient and cost effective. The bioconverter, filter-feeding mollusks and their pseudofeces can be harvested and converted to biocrude using an advanced thermochemical liquefaction technology. Methods, systems, and materials are disclosed for the harvest and isolation of algal lipids from the mollusks, molluscan feces and molluscan pseudofeces.

US Patent:

20110091945, Apr 21, 2011

Filed:

Oct 19, 2010

Appl. No.:

12/907206

Inventors:

Keshav Das - Athens GA, US
Ryan W. Hunt - Athens GA, US
Senthil Chinnasamy - Athens GA, US
Ronald Claxton - Winterville GA, US
Patrick Raber - Dalton GA, US

Assignee:

University of Georgia Research Foundation, Inc. - Athens GA

International Classification:

C12P 7/64
C12P 1/00

US Classification:

435134, 435 41

Abstract:

The present disclosure provides methods of enhancing the biofuel potential of an algal culture, the ability of an algal culture to provide a biofuel such as a lipid or to be processed to a biofuel, the method comprising: contacting an algal culture with a composition selected to enhance the biofuel potential of an algal culture; and allowing the algal culture to incubate to the point where the potential of the algal culture to provide a biofuel product or be processed to a biofuel product is enhanced compared to when the algal culture is not in contact with the composition. The selected algal species can be a species of a genus selected from the group consisting of: or any combination thereof, one suitable species being In some embodiments, the composition selected to enhance the biofuel potential of an algal culture can be a pesticide such as, but not limited to, malathion (2-(dimethoxyphosphinothioylthio)butanedioic acid diethyl ester).

US Patent:

20110296745, Dec 8, 2011

Filed:

Feb 22, 2010

Appl. No.:

13/139383

Inventors:

Roger Norris Hilten - Winterville GA, US
Keshav Das - Athens GA, US
James R. Kastner - Athens GA, US
Brian P. Bibens - Houston TX, US

International Classification:

C10L 1/19
B01J 19/00
C10L 1/222

US Classification:

44388, 44418, 422187

Abstract:

The disclosure encompasses in-line reactive condensation processes via vapor phase esterification of bio-oil to decease reactive species concentration and water content in the oily phase of a two-phase oil, thereby increasing storage stability and heating value. Esterification of the bio-oil vapor occurs via the vapor phase contact and subsequent reaction of organic acids with ethanol during condensation results in the production of water and esters. The pyrolysis oil product can have an increased ester content and an increased stability when compared to a condensed pyrolysis oil product not treated with an atomized alcohol.

US Patent:

20120237994, Sep 20, 2012

Filed:

Aug 12, 2010

Appl. No.:

13/388907

Inventors:

Keshav C. Das - Athens GA, US
Nagamani Balagurusamy - Torreon, MX
Senthil Chinnasamy - Chennai, IN

Assignee:

University of Georia Research Foundation, Inc. - Athens GA

International Classification:

C12N 11/14
C12M 1/00
C12P 5/02

US Classification:

435167, 435176, 4352891

Abstract:

Embodiments of the present disclosure provide for biochar impregnated with microbes, methods of making biochar impregnated with microbes, methods of using biochar impregnated with microbes, methods of using biochar to produce gas, reactors using biochar and/or biochar impregnated with microbes, methods of using the reactors, and the like.

US Patent:

20130040380, Feb 14, 2013

Filed:

Oct 1, 2012

Appl. No.:

13/632243

Inventors:

University of Georgia Research Foundation, Inc. - Athens GA, US
Senthil Chinnasamy - Athens GA, US
Keshav C. Das - Athens GA, US
Erico Rolim de Mattos - Athens GA, US

Assignee:

UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC. - Athens GA

International Classification:

G01N 21/64
C12M 1/42

US Classification:

4352921, 2504581, 250216

Abstract:

The present disclosure relates to biological optimization systems for enhancing photosynthetic efficiency and methods of use.

US Patent:

20130244309, Sep 19, 2013

Filed:

Mar 14, 2013

Appl. No.:

13/827879

Inventors:

Keshav C. Das - Athens GA, US

Assignee:

University of Georgia Research Foundation, Inc. - Athens GA

International Classification:

C12M 1/00
C12N 1/12

US Classification:

4352571, 4352891, 4352972

Abstract:

The present disclosure includes algal floway (AGF) systems for continuous, specific, economical, and efficient harvesting of algae biomass.