Enhancement of fermentative bioenergy (ethanol/hydrogen) production using ultrasonication of Scenedesmus obliquus YSW15 cultivated in swine wastewater effluent

Fermentative hydrogen and polyhydroxybutyrate production from pretreated cyanobacterial blooms

“…During fermentative processes, an intact algal cell wall can protect the cell from biodegradation [11,20]. Pretreatment can effectively disrupt the cell microstructure and subsequently enhance hydrogen production [8,11,13,20].…”

“…Pretreatment can effectively disrupt the cell microstructure and subsequently enhance hydrogen production [8,11,13,20]. In this study, three pretreatment methods (thermal, acid, and alkaline) were used to treat algal biomass.…”

Utilization of Microalgal Biofractions for Bioethanol, Higher Alcohols, and Biodiesel Production: A Review

“…Microalgae (such as Chlorella sp., Scenedesmus sp., and Chlamydomonas sp.) have an abundance of carbohydrates (cellulose) and proteins that can be converted to bioalcohol under specific fermentation conditions [44][45][46]. Biomass pretreatment enhances the hydrolysis rate of substrate as it enhances the solubility of sugar, increases surface area, improves the digestibility of substrate by weakening the cell wall, making enzymes more accessible [47].…”

“…Ultrasonication is a developing technology with the potential to decrease chemical loading and reaction time. It effectively modifies the surface structure of biomass which lead to enhanced saccharification [45,51]. It has been widely used for homogenization and disruption of the rigid cell wall of microalgae.…”

Microalgae as Future Fuel: Real Opportunities and Challenges

“…Cell disruption in ultrasonication is achieved either by microbubble cavitation or acoustic streaming [79]. Choi et al reported enhanced microalgal cell wall disintegration which resulted into increased ethanol and hydrogen production [80]. Grinding of algal biomass resulted in doubling of yield of algal fatty acids extraction.…”