The PCR-DGGE results demonstrated distinct microbial community structures at different temperatures. After inoculating the microalgal broths with mesophilic seed sludge, some strains adapted to the new environmental conditions, but other strains could not acclimate themselves to those, resulting in different acidification performances.
This study examined the relationships between VFAs accumulation and bacterial community structure during acidogenic fermentation of microalgal Salirasib at different operating temperatures. Operating temperature had a significant effect on the performance of acidogenic fermentation, and elevating temperature resulted in more active acidogenesis. Further research on combining VFAs production from microalgae with various industrial processes is required for supporting commercial viability of VFAs recovery from microalgae.
Algae; Cyanobacteria; Biofuel; Biovolume; Multivariate statistics
Even commercial-scale algal ponds cultivated in freshwater or seawater for high value products, many environmental (light and temperature), operational (pH, CO2 and nutrients) and biological (bacteria and fungi) parameters influence microalgal diversity and productivity ultimately affecting product quality and quantity (Kang et al., 2015 and Torzillo et al., 2003). In algal biotechnology applications like biofuels, it is mandatory to maintain the integrity of the dominant microalgal species, and hence wastewater treatment coupled biofuel applications have significant uncertainties. Moreover, the feasibility of controlling wastewater treatment ponds in terms of sustained dominant microalgal community and the mechanisms involved thereof are poorly understood (Park et al., 2013). In fact, unreliable nature of the algal harvest owing to these uncertainties is one of the critical factors which limit the use of wastewater for biofuel applications.