Cell disruption can increase the extraction efficiency of total lipids from microalgae for further conversion
to biodiesel. Four different pretreatment methods were tested on mixed cultures of microalgae
harvested in a stabilization pond system treating sewage: ultrasonication (US), microwaving (MW),
autoclave (AC) and electroflotation by alternating current (EFAC). The best results in terms of total lipid
yield were: MW (33.7 5.3%), followed by EFAC (24.8 7.1%), AC (15.4 2.3%), and US (13.3 3.0%).
However, when both efficiency and costs are considered, EFAC gave the best result and can be an
excellent option for simultaneous microalgae harvesting and cell disruption.
Cell disruption can increase the extraction efficiency of total lipids from microalgae for further conversionto biodiesel. Four different pretreatment methods were tested on mixed cultures of microalgaeharvested in a stabilization pond system treating sewage: ultrasonication (US), microwaving (MW),autoclave (AC) and electroflotation by alternating current (EFAC). The best results in terms of total lipidyield were: MW (33.7 5.3%), followed by EFAC (24.8 7.1%), AC (15.4 2.3%), and US (13.3 3.0%).However, when both efficiency and costs are considered, EFAC gave the best result and can be anexcellent option for simultaneous microalgae harvesting and cell disruption.
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