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- W2101833145 abstract "The key technologies for producing microalgae biofu els include identification of preferable culture conditions for high oil productivity, devel opment of effective and economical microalgae cultivation system, as separation and harvesting of microalgae biomass and oil. Microcyst,sp. biomass harvesting by flocculation was studied usin g inorganic coagulants (FeCl3.6H 2O, Al 2 (SO 4)3 18H 2O , liquid Bittern rich in Ca 2+ and Mg 2+ ions). The results show that FeCl3.6H 2O proved the best algae removed efficiency when used alone as coagulent. The only drawback is yellow color in the clarified water besides the pol lution with elements such as Fe ions. Algae removal efficiency increased remarkably when the cu lture water was pretreated with Na-ferrate and followed by [Al 2 (SO 4)3 .18H 2O] and pH adjusted to 7.1. The addition of Na-ferra te reduced the optimum dose to one half. As well as the use of sonication significantly enhanced the reduction of algae cells in culture water and reduc ed the optimum dose down to one third. Coagulation efficiency depends strongly on the coag ulant dose and sonication conditions. The optional sonication time (50- 60 sec.), the most ef fective sonication intensity was 2.5 w/cm 3 and the high removal ratio was 99% by the sonication-co agulation with alum reduced dose. The dried micro algae flocks were collected and subject ed for lipids extraction using less toxic solvents. Identification of lipids was studied by G as Chromatography and the antioxidant activity was determined (IC 50 = 39.3%) by 2,2diphenylpicryl-hydrazyl (DPPH) free radical using DR2000 spectrophotometer." @default.
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- W2101833145 date "2011-01-01" @default.
- W2101833145 modified "2023-09-26" @default.
- W2101833145 title "Optimized flocculation of microalgae for fuel oil and antioxidant production." @default.
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