Global ETD Search
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 70 for “"Algal Growth"”.
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Modeling algal growth dynamics in steady state systems.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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Action of Allelochemicals on Algal Growth and Photosystem Ii Efficiency
… 7 chemical classes was tested on unicellular algal growth and photosystem II (PSII) efficiency. Chlorella pyrenoidosa Chick and Selenastrum capricornutum Printz were the bioassay species. Fourteen of the 15 allelochemicals investigated resulted in a significant decrease in C. pyrenoidosa …
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The application of algal growth potential techniques to surfactant and zinc toxicity studies
… were undertaken to evaluate the suitability of algal growth potential techniques for testing the toxic effects of surfactants and zinc to an algal test organism. The algal growth potential techniques used included both static and continuous-flow algal bioassay procedures. The algal test organism …
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Algal growth potential and nutrient limitation in the Las Vegas Bay, Lake Mead, Nevada
Algal bioassays were conducted to determine algal growth potential (AGP) and nutrient limitation of the Las Vegas (LV) Bay of Lake Mead using the standard test organism Selenastrum capricornutum and the Lake phytoplankton. Results for the current nutrient levels in the LV Bay revealed that the AGP …
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The influence of algal growth and related ecological factors in reservoirs on the production and control of trihalomethane precursors
… evidence of a general relationship between algal population densities and the THMFP of the lake water. Successional shifts in the dominant genera and species of algae had little discernible effect on the THMFP of the water. Diurnal analysis clearly showed that the biota of a water …
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Tracing particle movement for simulation of light history and algal growth in airlift photobioreactors using Positron Emission Particle Tracking (PEPT)
This Thesis is embargoed. Only the Abstract is available
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Chemical limnology, algal growth potential, and nutrient limitation factors of the Upper New River, Virginia, and predictions concerning trophic status for the proposed Blue Ridge reservoirs
… excess of recommended water quality standards. Algal growth potential tests performed on water from mainstream and tributary stations identified the waters in Peach Bottom Creek as having the greatest growth potential and indicated that P availability might control the potential productivity of …
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Algal Succession and Nutrient Dynamics in Elephant Butte Reservoir
… New Mexico to understand nutrient dynamics and algal response during a three year period. The model chosen for this study was CE-QUAL-W2 because of its proven ability to represent hydrodynamics and the ability to represent multiple algal groups. Elephant Butte has been subject to large algal …
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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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Carbon dioxide mass transfer within algal raceway ponds and the potential for improvement using slopes to create wave
The growth of microalgae has the potential to be extremely useful for the production of a wide range of products or for specific processes, such as capture and cycling of CO₂. The fast micro-algal growth rates and ability to grow on agriculturally poor land and in waste water means that …
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A productivity study of the Roanoke River above Niagra Dam
… the phosphorus and nitrogen concentrations. The "Algal Assay Procedure Bottle Test" was than run on the samples and on the sample with phosphorus and/or nitrogen spikes to determine potential productivity and what we limiting potential productivity. Results of this investigation showed that the …
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An investigation of techniques in isolation and culture of the algal flora of soils
… candles of light and at 25-30 °C. 4- The mixed algal flora produced in the primary enrichment cultures were separated into unialgal cultures by a technique combining mechanical maceration with bacteriological pour plating. Eighty such unialgal cultures were established. The equipment and the …
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Augmented growth of haematococcus pluvialis using nutrients from post hydrothermal liquefaction wastewater (PHWW)
… an appropriate dilution of PHWW to support algal growth and astaxanthin production, while avoiding significant inhibitory effects of PHWW that have been previously reported in the literature. PHWW, was characterized for nitrogen and phosphorus content and compared with other wastewater …
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Zooplankton phytoplankton interactions in the San Joaquin River, Ca
<p>The dynamics of zooplankton and phytoplankton growth and interactions play a significant role in water quality (e.g., pH and dissolved oxygen [DO]) and the available food supply for higher order organisms in the San Joaquin River Delta. Algae have been shown to significantly impact DO …
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Expected impacts of climate change on water and wastewater treatment in the Eastern Ontario region
… runoff events. Taste and odor problems due to algal growth during spring and summer are an existing concern for at least five facilities in the study area. It is expected that this phenomenon will increase as a consequence of increased temperatures, increased evaporation rates and longer dry …
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Factors Affecting Phytoplankton Biodiversity and Toxin Production
… dissertation reports a survey of water quality, algal biodiversity, and toxin production in Southern California lakes, ponds, bays, and lagoons along the California coastline, in five counties from Santa Barbara to San Diego. Samples were analyzed for pH, electrical conductivity, total dissolved …
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An investigation of the environmental factors that affect water quality and the occurrence of harmful cyanobacteria in stormwater management ponds
… on SWMP water quality treatment and algal growth, including toxic cyanobacteria. Net release of total phosphorus (TP) and net retention of total nitrogen (TN) by SWMP were observed. Flow conditions had little affect on the overall functioning of the study SWMP. Large pond designs and …
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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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The effects of lake dynamics on the water quality of Abel Lake Reservoir
… treatment problems. Results also show that algal growth and nutrient concentrations were moderate during the study, however, the potential for cultural eutrophication is present should unmonitored development of the watershed occur.
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An investigation into marine biofouling and its influence on the durability of concrete sea defences
… analysis of armour concrete, the study of algal colonisation within the matrix and investigations into the presence of a bacterial biofilm within freshly hardened armour concrete. The effectiveness of photocatalytic coatings as a non-toxic anti-fouling strategy and cell attachment to …
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