Thesis On Microalgae

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Different techniques of cell disruption were applied prior to lipid extraction with solvent to enhance lipid yield.

To assess the cell disruption viability, treatments such as: microwave, ultrasonic, water bath, blender, laser and hydraulic pressing were investigated.

Aqueous phase reforming (APR) of powdered Chlorella vulgaris biomass was done at the University of Zaragoza, Spain to produce hydrogen with or without Ni catalyst with two pressure 30 or 35 bars at 227 o C.

The maximum H2 yield was 0.427 x 10-3 and 0.542 x 10-3 moles of H2 per 3 g of dry algal biomass, with Ni as catalyst at both pressure conditions.

The bio-oil content yield was found higher at 350 o C with 30 as compared to 60 min holding times and the GC-MS analysis showed the presence of fatty acids (C14-C18).

The aqueous phase contained TOC, TN and TP, which are useful nutrients for microalgae cultivation.

The microwave treatment was found the most energy efficient method with a higher percentage of cell disruption as compared the other treatments.

The microwave treatment, was chosen to enhance the lipid extraction with an organic solvent extraction from dry powdered and wet algal paste.

Microalgae can efficiently remove nitrogen and phosphorus from wastewaters.

Apart from enhancing wastewater treatment efficiency, the microalgae-based treatment systems were developed to promote microalgal growth as the produced microalgal biomass can be used in the production of e.g. Various kinds of wastewaters are produced in large quantities due to urbanization, industrialization and population growth.

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  • Mathilde Andersson - Lund University
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    Food vs fuel. Algae-based biofuels refer to those produced from microalgae biomass. Microalgae –those focused upon in this review- are the oldest living micro-organisms on earth. The real value of microalgae lies in their oil content and the possibility to convert it into biodiesel.…

  • PDF Algae Biotechnology -
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    PDF Algae are chlorophyll-containing photosynthetic organisms found everywhere on the earth, such as in the sea, rivers, lakes, soil, in animal, and plants. Algae represent a potential biomass.…

  • Final Degree Project
    Reply

    The use of microalgae as a source of biofuels is an attractive proposition from the point of view that microalgae are photosynthetic renewable resources. They produce oils with high lipid content, have fast growth rates and are capable of growth in saline waters which are unsuitable for agriculture.…

  • AN INVESTIGATION ON THE CO- PRODUCTION OF BIODIESEL AND METHANE FROM.
    Reply

    This work presented in this thesis could provide a basis for further research in the areas of biodiesel production from microalgae using the in-situ process and methane production from the microalgae residues, post transesterification. Parts of this thesis have been published in academic peer reviewed journals and…

  • CHARACTERIZING MICROALGAE Nannochloris oculata HARVESTING BY ALUMINUM.
    Reply

    Conductivity. This thesis reviews challenges of harvesting and concentration of green microalgae and examines the effect of pH, flocculant dosage, and culture conductivity on charge neutralization and flocculation of Nannochloris oculata by aluminum chloride.…

  • EVALUATING ALGAL GROWTH AT DIFFERENT TEMPERATURES - University of Kentucky
    Reply

    EVALUATING ALGAL GROWTH AT DIFFERENT TEMPERATURES Keelin Owen Cassidy University of Kentucky, [email protected] click to open a feedback form in a new tab to let us know how this document benefits you. This Master's Thesis is brought to you for free and open access by the Biosystems and Agricultural Engineering at UKnowledge.…

  • Bioactivity and Applications of Sulphated Polysaccharides from Marine.
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    Marine microalgae have been used for a long time as food for humans, such as Arthrospira formerly, Spirulina, and for animals in biomass of these microalgae and the compounds they produce have been shown to possess several biological applications with numerous health benefits.…

  • Hydrothermal processing of microalgae - White Rose eTheses Online
    Reply

    Microalgae contain large amounts of lipids and have faster growth rates than terrestrial biomass. One of the current technological bottlenecks of biofuels conversion is the economic extraction and processing of microalgae components. Due to their aquatic nature microalgae contain large amounts of water when harvested.…

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