A Review of Enzymatic Transesterification of Microalgal Oil-Based Biodiesel Using Supercritical Technology

<table class="table-group" id="tab11"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left">Method </td><td align="left">Advantages</td><td align="left">Disadvantage</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left">Sun drying </td><td align="left">(i) Cheap (no running cost, low capital cost)</td><td align="left">(i) Difficult  (ii) Slow  (iii) Weather dependent  (iv) Require large surface  (v) Contamination</td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">Spray drying</td><td align="left">(i) Fast  (ii) Continuous  (iii) Efficient</td><td align="left">(i) Cost intensive  (ii) Species deterioration (i.e. pigments) </td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">Drum drying </td><td align="left">(i) Fast  (ii) Efficient  (iii) Sterilization advantage</td><td align="left">(i) Cost intensive</td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">Freeze drying </td><td align="left">(i) Gentle</td><td align="left">(i) Slow process  (ii) Cost intensive</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Comparison between common four microalgae drying methods.

Enzyme Research

tab11

Table 11

Table 11: A Review of Enzymatic Transesterification of Microalgal Oil-Based Biodiesel Using Supercritical Technology 