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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 88 for “"algal biomass"”.
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Anaerobic digestion of algal biomass for bioenergy production- a feasibility study
… initiatives to increase biogas production. AD of algal biomass was studied in detail during the 1980’s, however, with the current drive toward cleaner technology processes, there has been a renewed interest in the technology. This study investigated the feasibility of using algal biomass as a …
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Thermal conversion of algal biomass and its derivatives to fuels and petrochemicals
Submitted in fulfilment of the requirements for the degree of Doctor of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2021.
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The Use of Algal Assays to Evaluate Algal Biomass in Regulated Streams
… This study was undertaken to evaluate the algalgrowth potential of the Des Moines River as it passes through Saylorville and Red Rock Reservoirs. Procedure. The test organism, "Selenastrum capricornutum" Printz, was grown in an algal assay which used various additions of nutrient spikes to …
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Algal biomass production inhibition and adaptive bioprocess pathways via reutilization of hydrothermal liquefaction wastewater
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Algal Biomass Accrual in Relation to Nutrient Availability along a Longitudinal Gradient in the Upper Green River, Kentucky
… (1) to assess the relationship between ambient algal biomass. and in-stream nutrient levels along the longitudinal course of a river through a transition from weak to well-developed underlying karst bedrock, and (2) experimentally assess if periphyton was nitrogen or phosphorous limited between …
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Effects of Short-Term Dewatering on Grazer Abundance and Algal Biomass in a Wastewater Treatment Algal Turf Scrubber
… one of society’s most daunting challenges. Algae biomass is a promising renewable resource for biofuel production due to its efficient conversion of solar energy into chemical energy. Algal turf scrubbers (ATS™) systems mimic natural streams, flowing wastewater over hard substrates designed to …
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Effect of Macrograzers (Campostoma spp. and Faxonius spp.) on Periphyton in Ozark Streams with Considerations Given to Macrograzer Biomass, Phosphorus, and Season: Mensurative and Manipulative Studies
<p>Nutrient and benthic algal biomass relationships can guide numeric nutrient criteria development in lotic systems. However, herbivorous macrograzers may confound this relationship by reducing the slope of the positive relationship between nutrients and periphyton biomass in streams. I conducted …
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Use of Biodiesel-Derived Crude Glycerol for the Production of Omega-3 Polyunsaturated Fatty Acids by the Microalga Schizochytrium limacinum
… crude glycerol was a viable carbon source for algal growth and DHA production, with 75 g/L to 100 g/L of glycerol being the optimum concentration range. In addition to glycerol concentration, temperature, trace metal levels, ammonium acetate concentration, and NH4Cl concentration also had …
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Synthesis and characterization of starch-based cationic flocculants for harvesting microalgae.
… technically and economically challenging step in algal biomass production and utilization. Many techniques have been developed and tested, and some of them are used with limited success. However none of these techniques has broad commercial applications, especially in the area of algae based fuels …
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Livestock Exclusion Effects on the Structure and Function of Headwater Streams
… matter dynamics, benthic macroinvertebrates, algal biomass, and leaf breakdown in non-fenced, fenced, and forested streams. Increased growth of non-woody vegetation and the pre-existence of woody plants had a significant influence on stream organic matter dynamics. Tree basal area in a 20 m …
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The effects of nutrients and hydrology on periphyton and phytoplankton in Fraser River tributaries, British Columbia
… to examine which factors explain variation in algal biomass and taxonomic composition. July epilithic periphyton chlorophyll a was weakly correlated with TN, while October periphyton was significantly related to DP and conductivity. The phytoplankton biomass in July was best predicted by TP (r2 …
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Effects of Grazers and Elevated Temperature on the Dynamics of a Wastewater Algal Treatment System
<p>Wastewater algal treatment systems (ATS) have been shown to effectively remove excessive nutrients from wastewater and prevent eutrophication. However, the performance of ATS could be strongly affected by environmental factors. This study examined (1) the effect of grazers on nutrient removal …
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Hydrothermal liquefaction for energy recovery from high-moisture waste biomass
… technology for converting high-moisture waste biomass into energy dense “biocrude” oil that can be used for direct combustion or refined for transportation grade fuels. This study investigates the influence of biomass composition on the chemical characteristics of hydrothermal liquefaction …
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Impacts of SCUBA divers in the Silfra groundwater fissure : ecological disturbance and management
… potential environmental impacts by: 1) comparing algal biomass and zoobenthic diversity of Silfra to Flosagjá, a fissure where diving is prohibited, 2) comparing algal biomass and zoobenthic diversity between areas of different dive-usage within Silfra, 3) recording diver underwater behavior to …
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A Method Comparison and Stressor-Response Experimental Study of Nitrogen and Phosphorus Impacts to Periphyton in Ozark Streams
… bioassessment is important for understanding algal-nutrient relationships and the development of scientifically defensible numeric nutrient criteria. However, multiple methods of periphyton data collection are currently used, and little is known about the comparability of resulting datasets. …
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The development of an algal bioassay procedure using Stigeoclonium subsecundum and the demonstration of the effect of intermittent chlorination on an attached filamentous alga
A continuous flow algal bioassay system using the filamentous alga Stigeoclonium subsecundum attached to removable substrates (stigeocloniometers) was used to determine the effects of intermittent chlorination on an attached alga. Preliminary experiments were conducted to determine 1) the best …
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Cyanobacterial Harmful Algal Blooms Vary Within and Across Years at Lake Fayetteville, Arkansas
<p>The occurrence of cyanobacterial harmful algal blooms (HABs) and toxins are a nationwide concern. Although Lake Fayetteville likely experienced HABs for many years, microcystin, an algal toxin, was not monitored until 2019. The objectives of this study were to: 1) observe temporal variation in …
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Litter Conditioning is Differentially Affected by Leaf Species, Phosphorus Enrichment, and Light Availability
… and light availability differentially affected algal biomass (as chlorophyll a), microbial metabolic rates, and litter stoichiometry. Algal biomass responded to increased P enrichment only when coupled with greater light intensity, and respiration rates increased with P enrichment in both light …
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