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Showing 1 to 13 of 13 for “"raceway ponds"”.
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Enhancing CO2 mass transfer in algal raceway ponds through wave generation
… of microalgae is currently mostly done using raceway ponds. These ponds however suffer from low algal productivities compared to closed photobioreactors, in part due to inadequate CO2 mass transfer into the culture. A previous study at the University of Cape Town explored a method to improve …
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Enhancing CO2 mass transfer in large scale algal raceway ponds through wave generation
The commercial growth of algae in raceway ponds is limited by the availability of carbon, supplied as carbon dioxide (CO2), resulting in a linear growth rate, also described as biomass productivity, determined by the mass transfer rate. This reduces the specific growth rate of the system, as the …
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Carbon dioxide mass transfer within algal raceway ponds and the potential for improvement using slopes to create wave
… processes for certain applications. The raceway pond is the most common reactor used for the growth of microalgae, due to low capital costs, low operating costs, higher energy efficiency, improved net energy recovery and ease of installation. Low carbon dioxide mass transfer, which limits …
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Lipid Production by Microalgae Treating Municipal Wastewater
… production of industrial algae operates in open raceway ponds that use minimal capital and energy inputs to culture algae. Raceway ponds can also be used to grow microalgae from municipal waste streams. Although high biomass productivity can be achieved in these systems, there remains a large …
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Environmental and economic assessment of microalgae-derived jet fuel
… The four cultivation technologies include open raceway ponds, horizontal serpentine tubular photobioreactors (PBRs), vertical serpentine tubular PBRs, and vertical flat panel PBRs. Open raceway ponds were modeled from previous literature, while the PBRs were modeled, validated and optimized for …
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A dynamic engineering model of algal cultivation systems
… (PBR) and 6.7%+/5.33% for an open raceway pond (ORP) across five total species: Chlorella vulgaris, Desmodesmus intermedius, Galdieria sulphuraria, Galdieria sulphuraria Soos, and Nannochloropsis oceanica. The validated model assesses productivity at several locations in the United …
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Growth Media and Lipid Determination Comparison of High Rate Algae Ponds
… Comparison</p> <p>of High Rate Algae Ponds</p> <p>Eric Alexander Nicolai</p> <p>The feasibility of algal biofuel production relies on the use of a non-potable water source. Municipal wastewater is nutrient-rich and a cost effective option as a growth media in algae ponds. However, this …
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Adaptive Laboratory Evolution of Scenedesmus obliquus for Increased Carbohydrate Content and Biomass Productivity
… and selection under outdoor conditions in a raceway pond at a high dilution rate to increase biomass productivity.</p> <p>Two cultigens were generated with the goal of increased carbohydrate content: K5 and K7. Both were mutagenized for 5 seconds and cultivated in 50-mL Klavins reactors. K5 …
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Water and Nutrient Recycling in High Rate Algae Ponds Fed in Primary Treated Municipal Wastewater
… nutrient and water recycling in high rate algae raceway ponds (HRAP) fed primary treated municipal wastewater. Research was conducted primarily at the San Luis Obispo Water Resource Reclamation Facility (SLOWRRF). Nine 30 m<sup>2</sup>, 0.3 m deep HRAP’s were operated continuously from June 1, …
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Integrated Aeration for Enhanced Nitrogen Conversion and Removal and the Effect of Sampling Frequency on Productivity Estimates in Algae-Based Wastewater Treatment Systems
<p>Raceway ponds can be used to cultivate microalgae for purposes such as wastewater treatment and feedstock for animal feeds and biofuels. Besides nitrogen assimilation in biomass, nitrification can be a wastewater treatment mechanism but one that is hindered by the low nighttime dissolved oxygen …
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Environmental and economic evaluation of algal-based biofuels through geographically resolved process and sustainability modeling
… predictions of evaporation losses in open algae raceway ponds and investigating the effects of evaporation rates on pond temperatures and growth rates. To date, this is the first modeling effort focused on predicting the evaporation losses of open algal ponds at the commercial scale. The outputs …
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Simulation, sensitivity analysis, and optimization of bioprocesses using dynamic flux balance analysis
… novel combinations of microbial communities in raceway ponds have been studied. The performance of algal-yeast cocultures and more complex communities for biolipids production has been evaluated, gaining relevant insights that will soon be tested experimentally. These combinations could enable …
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Towards bioengineered ecosystems: Three studies in invasion biology
… of open culture systems such as algal raceway ponds. Biological invasion theory attempts to predict what makes a community vulnerable to invasion, what characteristics make an invader successful, and what consequences following invasion might arise. In this thesis, a review of recent …