Abstract：
:Separate hydrolysis fermentation (SHF) and simultaneous saccharification fermentation (SSF) processes were studied for bioethanol production from microalgal biomass. SSF was selected as an efficient process to enhance the bioethanol yield through repeated-batches using immobilized yeast cells. Combined sonication and enzymatic hydrolysis of Chlamydomonas mexicana generated 10.5 and 8.48g/L of ethanol in SSF and SHF, respectively. Yeast utilized maximum portion of total reducing sugar (TRS) reaching a consumption efficiency of 91-98%. A bioethanol yield of 0.5g/g (88.2% of theoretical yield) and volumetric productivity of 0.22g/L/h was obtained after 48h of SSF. Immobilized yeast cells enabled repetitive production of ethanol for 7 cycles displaying a fermentation efficiency up to 79% for five consecutive cycles. The maximum ethanol production was 9.7g/L in 2nd-4th cycles. A total energy recovery of 85.81% was achieved from microalgal biomass in the form of bioethanol. Repeated-batch SSF demonstrated the possibility of cost-effective bioethanol production.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
El-Dalatony MM,Kurade MB,Abou-Shanab RAI,Kim H,Salama ES,Jeon BHdoi
10.1016/j.biortech.2016.07.113subject
Has Abstractpub_date
2016-11-01 00:00:00pages
98-105eissn
0960-8524issn
1873-2976pii
S0960-8524(16)31092-6journal_volume
219pub_type
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