Biophysical modeling of microalgal cultivation in open ponds

Behera, Bunushree; Aly, Nazimdhine; Balasubramanian, P.

doi:10.1016/j.ecolmodel.2018.09.024

Cited by 18 publications

(2 citation statements)

References 41 publications

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“…For example, the cosmopolitan diatom Skeletonema costatum, whose lipid composition is adequate for biodiesel production [22], has been associated with winter bloom events [38] and could thus be cultivated during cold months. Predictive mathematical models provide comprehensive knowledge of the likely behaviour of microalgal cultures at the field scale and economic assessments to be carried out, as indicated by Bahera et al [17,39,40].…”

Section: Effect Of Temperature and Salinity On H Coffeaeformis Growth Ratementioning

confidence: 99%

Temperature and Salinity Effect on Tolerance and Lipid Accumulation in Halamphora coffeaeformis: an Approach for Outdoor Bioenergy Cultures

et al. 2021

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Biodiesel production from the microalgal oil of the estuarine diatom Halamphora coffeaeformis has proven to be technically viable. However, a fuller understanding of the environmental factors that regulate its tolerance and neutral lipid accumulation is required for improved mass cultivation in seawater-based outdoor raceway ponds. Meteorological conditions and evaporation processes can significantly influence factors such as the salt levels, water temperature and nutrient and light availability in these systems. Laboratory experiments with H. coffeaeformis growing in f/2 medium were therefore carried out in order to evaluate the effect of temperature and salinity on its growth and tolerance ranges and the effect of salinity on its total lipid and lipid fraction content and fatty acid methyl ester profile. Results indicate that the temperature and salinity ranges of the species were 5 °C to 30 °C and 5‰ to 95‰, respectively. The optimum temperature was between 20 and 25 °C, and the optimum salinity was 20‰. Neutral lipid accumulation increased in cells adapted at 45‰ with respect to those growing at 20‰. Total lipid composition at 45 ‰ was characterized by 85.5% neutral lipids, 2.5% phospholipids and a high percentage of C16.1 (36.4% of total fatty acids). These properties are important for an adequate quality of biodiesel. The eurytolerant behaviour of H. coffeaeformis and the effect of salinity stress on its growth and neutral lipid accumulation are demonstrated. The findings indicate the beneficial attributes of this strain for the development and feasibility of seawater-based outdoor raceway ponds for biodiesel production.

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Section: Effect Of Temperature and Salinity On H Coffeaeformis Growth Ratementioning

confidence: 99%

Temperature and Salinity Effect on Tolerance and Lipid Accumulation in Halamphora coffeaeformis: an Approach for Outdoor Bioenergy Cultures

et al. 2021

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“…Another attractive advantage of microalgae involves the capacity to sequester large amount of CO 2 from the atmosphere. The carbon fixed into biomass can be processed as biofuel/biodiesel (Behera et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Behera

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et al. 2019

Maejo Int. J. Energ. Environ. Comm. or MIJEEC

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Increased global warming due to the vehicular and industrial emissions has led to the development novel carbon sequestration technologies. In this investigation, exhaust gas from an internal combustion (IC) engine was used to grow microalgae. For this purpose, a twin cylinder, four stroke, water cooled direct injection (DI) developing power of 7.36 kW at a constant speed of 1500 rpm was used. The test engine was fuelled with diesel and operated at four different injection pressures, and subsequently with five different injection timings. The optimum injection pressure and injection timings were determined based on the results obtained from the performance and emission parameters of the test engine, resulting maximum carbon dioxide (CO2) exhaust of 3% v/v. A shell and tube heat exchanger was developed and designed to cool the exhaust gas of the engine. Then, the cooled exhaust gas was supplied to an algae reactor for growing microalgae. The algae growth before and after CO2 supply was determined and the results indicated higher growth rate in the algal media supplemented with CO2 compared to the control without CO2 addition. Such studies would aid in reducing the cost of algal cultivation and would further mitigate the greenhouse gas emissions (GHG).

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