ALGAL BIOFUELS:ENHANCING ENERGY YIELD, NUTRIENT SUPPLY FROM WASTEAND NUTRIENT RECYCLING FROM ALGAL RESIDUES

microalgal cultivation;sequential phototrophic and heterotrophic growth;phycoremediation;nutrient consumption and recycling;anaerobic digester effluent;spent growth medium;triacylglycerols;lipid extracted algae;integrated biodiesel and methane production;anaerobic digestion;biogas;nitrogen and phosphorus recycling;trace element recovery;thermal and thermochemical pretreatmnet;enzymatic pretreatment;biofuel sustainability;Auxenochlorella protothecoides;Chlorella sorokiniana;Nannochloropsis salina;Algal Turf Scrubber;green filamentous algae;Environmental Engineering

Bohutskyi, PavloBetenbaugh, Michael J. ;

Johns Hopkins University

关键词: microalgal cultivation;    sequential phototrophic and heterotrophic growth;    phycoremediation;    nutrient consumption and recycling;    anaerobic digester effluent;    spent growth medium;    triacylglycerols;    lipid extracted algae;    integrated biodiesel and methane production;    anaerobic digestion;    biogas;    nitrogen and phosphorus recycling;    trace element recovery;    thermal and thermochemical pretreatmnet;    enzymatic pretreatment;    biofuel sustainability;    Auxenochlorella protothecoides;    Chlorella sorokiniana;    Nannochloropsis salina;    Algal Turf Scrubber;    green filamentous algae;    Environmental Engineering;   

Others  :  https://jscholarship.library.jhu.edu/bitstream/handle/1774.2/39329/BOHUTSKYI-DISSERTATION-2014.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: JOHNS HOPKINS DSpace Repository

【 摘 要 】

Algae represent a potentially valuable feedstock for renewable production of biofuels. However, algal biofuels are not yet economically competitive with fossil fuels. A number of technical roadblocks exist including high demand for chemical fertilizers during algal cultivation, insufficient biomass and lipid productivities, and inefficient conversion of algal feedstock into biofuels. This thesis seeks to improve the economic and environmental sustainability of algal biofuels by (1) reducing fertilizer consumption through partial recycling of essential nutrients and/or their acquisition from wastes; (2) enhancing algal productivity through screening and isolation of fast growing and robust algal species suitable for cultivation in organic waste, and developing of advanced cultivation techniques; and (3) increasing energy yields from algal biomass through conversion of lipid extracted algal residues into methane.In addition, the proposed capture and consumption of potentially harmful environmental nutrients from human, animal and algal wastes will eliminate their discharge into water bodies and reduce anthropogenic pressures on ecosystems. Finally, successful implementation of the proposed technology will benefit economic development and reduce environmental costs for society as a whole but especially for rural and underdeveloped communities with ecosystems challenged by pollution from agriculture and other industries.