Abstract：
:One of the hurdles of renewable energy production from photosynthetic microorganisms is separating the biomass from water in cultures. Bioflocculation with filamentous fungus Aspergillus niger, an alternative low-cost method used for such separation, was studied with four cyanobacteria. Cocultures with Spirulina maxima and Synechococcus subsalsus resulted in bioflocculation efficiencies up to 94%, while with Anabaena variabilis and Anabaena siamensis bioflocculation did not occur. S. subsalsus was selected to evaluate the effect of cyanobacterial initial concentration, fungal:cyanobacterial ratio, carbon supplementation, and pH on biomass densification. Bioflocculation efficiencies up to 98% in 48 h were obtained with fungal:cyanobacterial ratio 1:5 and carbon supplementation. Despite the lower efficiency (54%), the highest concentration factor of S. subsalsus suspension (62.8 - from 0.9 to 56.5 g/L) was obtained with ratio 1:5 without supplementation. This result was attributed to the smaller pellet diameter (2.5 mm) and indicated that lower pellet growth is better for biomass densification.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Oliveira HR,Bassin ID,Cammarota MCdoi
10.1016/j.biortech.2019.122167subject
Has Abstractpub_date
2019-12-01 00:00:00pages
122167eissn
0960-8524issn
1873-2976pii
S0960-8524(19)31397-5journal_volume
294pub_type
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