کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1742134 1521828 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microalgae flocculation: Impact of flocculant type, algae species and cell concentration
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Microalgae flocculation: Impact of flocculant type, algae species and cell concentration
چکیده انگلیسی


• Flocculation of three microalgae species was studied.
• Modified starches produced more concentrated flocs than aluminum sulfate did.
• At greater cell concentrations more cells were flocculated per mg of flocculant.
• Cationic starch with high DS was more efficient than that with low DS.

Flocculation is an effective means of de-watering microalgae. This study was conducted to evaluate how cell type and concentration impact flocculation efficiency. Aluminum sulfate (Al2(SO4)3) and two cationic starches with degree of substitutions of 0.5 and 0.2 (DS05 and DS02) were used to flocculate cells of Scenedesmus spp., Chlamydomonas reinhardtii, and Schizochytrium limacinum at three cell concentrations. The amount of cells flocculated per mg of flocculant used was 4–28 times greater with the modified starches than with Al2(SO4)3. The maximum amount of cells flocculated per mg of flocculant was the greatest for S. limacinum (414 mg cells/mg DS05 and 25.6 mg cells/mg Al2(SO4)3), which had a surface zeta potential of − 9.97 mV. The flocs produced by the starches were more concentrated in cells and less prone to disruption than those produced with Al2(SO4)3. In general, at high cell concentrations the mass of cells flocculated per unit mass of DS05 and Al2(SO4)3 increased for all algae species. Cationic starches, especially those with high degree of substitution, provide an efficient and ecologically friendly way to harvest microalgae for biofuel production. This study achieved the goal of evaluating important factors and conditions that are unique for a particular algae production system in order to most efficiently harvest microalgae by flocculation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Algal Research - Volume 3, January 2014, Pages 30–35
نویسندگان
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