BIOFIXATION OF CO 2 AND GREENHOUSE GAS ABATEMENT WITH MICROALGAE - TECHNOLOGY ROADMAP

摘要: This Roadmap provides an expert consensus of the R&D that needs to be carried out develop practical microalgae processes could abate hundreds millions tons fossil CO2 and other greenhouse gases. Such would use from power plant flue-gases or similar sources cultivate specific microalgal species in large ponds at high solar conversion efficiencies, with harvested biomass converted renewable fuels replace fuels. The objective this is identify issues resolved within five years result development applications decade. Currently, mass cultures have some production human food supplements specialty animal feeds as well wastewater treatment. Most commercial shallow raceway ponds, mixed paddle wheels, such designs can used large-scale algal biomass. Considerable has been past, mainly U.S., on using open ponds. However, dedicated biofuels are presently not economically competitive fuels, even assuming very productivities. Only by combining treatment co-production higher-value products, relatively low-cost gas abatement projected. Four multipurpose presented meet these objectives: • Use flue municipal for methane. Agricultural waste fertilizers, co-products. N2-fixation nutrient recycling biofertilizers. Co-production volume/higher value biopolymers chemicals. All same pond systems, harvest algae fuel-fired gases sources. major identified a level include, brief: Develop techniques select maintain strains cultures. Overcome limiting factors achieve productivities 100 ton/hectare/year mid-term. harvesting processes, bioflocculation-sedimentation screening. Integrate higher products (e.g. treatment). Advance engineering art systems based earthen Assess potential technologies GHG abatement, both regionally globally. Keeping specific, selected strain dominant remains challenge will require multi-stage inoculum superior strains. Achieving co-products genetic improvement Low-cost also cultivation intended help guide efforts organizations participating International Network Biofixation Greenhouse Gas Abatement Microalgae. projects include process field scale laboratory studies. coordinate programs, foster collaborations, facilitate information exchanges, provide technical expertise through its Technical Advisers carry technology resource assessments. initiate deployment microalgae-based