Large-Scale Microalgae Cultivation in Agricultural Wastewaters for Biofixation of CO2 and Greenhouse Gas Abatement

Award Information
Agency:
Department of Energy
Branch:
N/A
Amount:
$750,000.00
Award Year:
2005
Program:
SBIR
Phase:
Phase II
Contract:
DE-FG02-04ER83988
Agency Tracking Number:
76092B04-I
Solicitation Year:
2004
Solicitation Topic Code:
22 d
Solicitation Number:
DOE/SC-0072
Small Business Information
Kent Sea Tech Corp
11125 Flintkote Avenue, San Diego, CA, 92121
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
N/A
Principal Investigator
 Michael Massingill
 Mr.
 (858) 452-5765
 mmassingill@kentseatech.com
Business Contact
 Barbara Cota
Title: Ms.
Phone: (858) 452-5765
Email: bcota@kentseatech.com
Research Institution
N/A
Abstract
76092B Novel, cost-effective technologies are needed to stabilize and reduce greenhouse gas emissions. Microalgae have been shown to be able to fix carbon dioxide (CO2) at high rates, producing a biomass that can be converted to biofuels and chemicals to replace fossil fuels. However, additional research is needed to increase the efficiency of CO2 fixation and develop the techniques for managing algal cultures in large-scale applications. This project will develop large-scale microalgae-based carbon sequestration technologies using power plant flue gases for CO2 and agricultural wastewaters as nutrient sources. The algal biomass harvested from the mass culture ponds will be converted to methane fuel, a substitute for fossil fuels, with the residues used as fertilizers. Phase I cultured several strains of microalgae that showed high capacity for CO2 fixation. Preliminary experiments were conducted to determine the optimal conditions for producing rapid and consistent blooms of microalgae using nutrient-rich agricultural wastewaters. Techniques were identified for concentrating the algal biomass harvested from the ponds and digesting it to produce methane gas. In Phase II, experiments will be conducted to determine the optimal temperature, light, nutrient, water depth, and water velocity conditions for stimulating microalgae growth in the high-rate pond systems. An innovative sedimentation belt concept will be evaluated as a cost-effective means for concentrating and harvesting the algal biomass. Optimal techniques for converting the harvested algal biomass to biofuels (methane gas) and biofertilizers will be developed. Commercial Applications and Other Benefits as described by the awardee: A carbon sequestration process that results in the production of biofuels and fertilizers should provide sufficient revenues to allow the abatement of greenhouse gas emissions to be accomplished. A potential commercial application of this technology is the removal of nutrients from agricultural drainage waters to prevent pollution of the receiving waters.

* information listed above is at the time of submission.

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