کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6767759 512461 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microwave treatment of wet algal paste for enhanced solvent extraction of lipids for biodiesel production
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Microwave treatment of wet algal paste for enhanced solvent extraction of lipids for biodiesel production
چکیده انگلیسی
The role of microwave treatment as a precursor to lipid extraction from Nannochloropsis oculata using solvent extraction was investigated. Two microwave power settings were used, corresponding to wall plug powers of 635 and 1021 W. To limit the maximum temperature rise of the wet algal samples, exposure times were capped to 15 s intervals and followed by 15 min of cooling. Samples were treated in total from 1 to 5 min of microwave treatment (i.e. 1 min was 4 × 15 s treatments). The lysed fraction increased with exposure time for both power levels and the extracted lipids closely followed the lysed fraction. The highest extracted lipid content, after 5 min, was 0.036 g/g dry algae weight (g/g) for 635 W (68.86% cell lysis), while with 1021 W the yield was 0.052 g/g (92.81%). The control sample, which did not receive any microwave treatment, was only 0.016 g/g dry algae weight. Significance was observed between treatment time, cell lysis and lipid yield, (p < 0.05). For the 5 min of treatment, the lipid produced per total number of Joules consumed was found for each microwave power setting; yielding values of 1.889 × 10−4 g/g/kJ (635 W) and 1.697 × 10−4 g/g/kJ (1021 W).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 76, April 2015, Pages 470-477
نویسندگان
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