|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|6451888||1416986||2017||11 صفحه PDF||سفارش دهید||دانلود رایگان|
- The nominally freshwater microalga Chlorella vulgaris was grown in seawater.
- Oil productivity in sweater was double the productivity in freshwater.
- Biomass yield on phosphate was â¼27% higher in seawater relative to freshwater.
- Biomass loss in the dark obeyed first-order kinetics.
- The calorific value of the seawater-grown biomass exceeded 25Â kJÂ gâ1.
Five nominally freshwater microalgae (Chlorella vulgaris, Choricystis minor, Neochloris sp., Pseudococcomyxa simplex, Scenedesmus sp.) with a known ability to produce high-levels of lipids for possible use as fuel oils were evaluated for their ability to thrive and produce lipids in seawater and brackish water. Only C. vulgaris was found to thrive and produce lipids in full strength seawater. Seawater tolerant strains of C. vulgaris are unusual. Lipid productivity in nutrient sufficient seawater exceeded 37Â mgÂ Lâ1Â dâ1 and was nearly 2-fold greater than in freshwater. Although other microalgae such as C. minor had higher lipid productivities (e.g. 45Â mgÂ Lâ1Â dâ1), they did not thrive in seawater. The lipid content of the C. vulgaris biomass was nearly 16% by dry weight. The calorific value of the seawater-grown C. vulgaris biomass exceeded 25Â kJÂ gâ1. Compared to continuously illuminated cultures, a 12/12Â h light-dark cycle reduced lipid productivity of C. vulgaris by â¼30%, but did not affect the lipid content of the biomass. Biomass yield on phosphate was nearly 27% higher in seawater compared to in freshwater. While C. vulgaris has been extensively studied in freshwater, it has not been examined to any detail in full strength seawater. Studies in seawater are essential for any future large scale production of algal oils for biofuels: seawater is available cheaply and in large amounts whereas there is a global shortage of freshwater.
Journal: Journal of Biotechnology - Volume 257, 10 September 2017, Pages 47-57