کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
685767 889049 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Conversion of sewage sludge into lipids by Lipomyces starkeyi for biodiesel production
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Conversion of sewage sludge into lipids by Lipomyces starkeyi for biodiesel production
چکیده انگلیسی

The potential of accumulation of lipids by Lipomyces starkeyi when grown on sewage sludge was assessed. On a synthetic medium, accumulation of lipids strongly depended on the C/N ratio. The highest content of lipids was measured at a C/N-ratio of 150 with 68% lipids of the dry matter while at a C/N-ratio of 60 only 40% were accumulated. Within a pH range from 5.0 to 7.5 the highest lipid accumulation was found at pH 5.0 while the highest yield per litre was pH 6.5. Although sewage sludge had no inhibitory effects on growth or accumulation on L. starkeyi when added to synthetic medium, there was no significant growth on untreated sewage sludge. However, pretreatment of sludge by alkaline or acid hydrolysis, thermal or ultrasonic treatment lead to accumulation of lipids by L. starkeyi with highest values of 1 g L−1 obtained with ultrasound pre-treatment. Based on the content of free fatty acids and phosphorus, lipids accumulated from sewage sludge could serve as a substrate for the production of biodiesel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 99, Issue 8, May 2008, Pages 3051–3056
نویسندگان
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