Factors Determining Oil Yield in Selected Marine Bacillariophyceae

Babu, M M; PRABA, T.; CITARASU, T.; Selvaraj, Thangavel; Dhas, Stephen; Gopal, P S Maya; AJAN, C.

doi:10.32381/jat.2019.34.1-2.5

Cited by 2 publications

(2 citation statements)

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“…In all the media, the maximum OD of isolate B attained on day 2, after which there were decreases in the OD values. This is in agreement with Praba et al (2016) who reported the same pattern of growth and cell count during their study on the effect of different culture media on the growth and oil yield in selected marine microalgae. Llavarasi et al (2011) also reported that the maximum cell concentration was attained on day 2 in some of their results during optimization of various growth media for growth of freshwater microalgae.…”

Section: Cultivation Of Microalgae Species a B And C In Blue Green (B...supporting

confidence: 92%

Outdoor cultivation of microalgae in a medium enriched with poultry droppings for biomass production

Ezea,

Ogbonna

2023

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Microalgae require nutrients and optimal pH for good growth and metabolite production. Microalgae biomass has various applications in food and feed, pharmaceuticals, bio-energy, aquaculture, cosmetics and other related industries. However, the cost of media represents a significant percentage of the total production cost. The aim of this work was therefore, to develop a cheap medium for efficient outdoor cultivation of microalgae and to find the optimum pH for biomass production. Three Chlorella species designated A, B and C were isolated from three stagnant water bodies at Amoke Lane, University market road in Nsukka town by using BG-11 enriched with poultry droppings. Poultry droppings medium was prepared by drying under the sunlight for 5 days. The dried poultry droppings were crushed into a fine powder and 200 g was weighed and soaked in 1000 ml of distilled water for 3 days and filtered using a muslin cloth. A mixture of the poultry droppings medium and the conventional BG-11 medium was prepared by mixing equal volume of each medium. The growth and biomass productivity of the three local isolates in BG-11 medium were compared with those in poultry medium, and a mixture of poultry and BG-11 media. The results showed that the growth of the three isolates in poultry medium alone were significantly higher than the values obtained in BG-11 and a mixture of BG-11 and poultry medium (p< 0.05). With poultry medium, the maximum optical densities of the cultures were 2.10± 0.07, 2.56± 0.09 and 3.35± 0.11 for isolates A, B, and C respectively. However, with a mixture of BG-11 and poultry medium, the maximum optical densities were 0.83± 0.01, 1.67± 0.05 and 0.57± 0.02 respectively. BG-11 supported the least growth of the three isolates, giving maximum optical densities of 0.38± 0.01, 0.42± 0.03 and 0.52± 0.02 respectively. All the three isolates had their best growth in poultry medium at pH of 5.0. The results show that poultry medium, which is cheap and can be easily prepared from poultry droppings, is very good for cultivation of some species of microalgae.

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Section: Cultivation Of Microalgae Species a B And C In Blue Green (B...supporting

confidence: 92%

Outdoor cultivation of microalgae in a medium enriched with poultry droppings for biomass production

Ezea,

Ogbonna

2023

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“…An earlier report of Bartley et al [27] stated that the salinity increase from 22 to 34 PSU can cause a significant increase in lipid content of 35% by weight, and a recent work of the previous researcher from our laboratory reported that the Skeletonema sp. obtained the maximum oil yield of 35.69 ml/100 g in 35 ppt [28].…”

Section: Salinitymentioning

confidence: 96%

Optimization of physical parameters for the growth and lipid production in Nannochloropsis gaditana (Lubian, 1982)

2020

jabb

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Microalgae produce a wide range of compounds including pigments, protein, starch, and lipids, which have been extensively used for various applications. In the current scenario, microalgal lipids are considered as a promising source for the production of next-generation bioenergy, and a huge productivity is needed to meet the demand. Thus, to increase the production of biomass and lipid content, physical conditions play an important role and necessary to be optimized. The present study made such an attempt to optimize the physical factors for the growth and production of lipid from Nannochloropsis gaditana. The study aimed to determine the effect of physical parameters such as pH, temperature, light intensity, and salinity. The results showed that the maximum growth rate of the N. gaditana was noticed in the salinity of 25 ppt, pH of 8, temperature of 25°C, and 2,000 lux of light intensity. The highest lipid content of the N. gaditana was noticed in the salinity of 30 ppt, pH of 8, and temperature of 30°C with 2,000 lux light intensity. After optimization, above 40% of lipid yield was obtained, and it can be effectively utilized in bioenergy production.

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Factors Determining Oil Yield in Selected Marine Bacillariophyceae

Cited by 2 publications

References 0 publications

Outdoor cultivation of microalgae in a medium enriched with poultry droppings for biomass production

Outdoor cultivation of microalgae in a medium enriched with poultry droppings for biomass production

Optimization of physical parameters for the growth and lipid production in Nannochloropsis gaditana (Lubian, 1982)

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