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Evaluation of ethanol production and bioadsorption of heavy metals by various red seaweeds.

Abstract：

:The objective of this study was to evaluate ethanol production and bioadsorption with four red seaweeds, Gelidium amansii, Gracilaria verrucosa, Kappaphycus alvarezii and Eucheuma denticulatum. To produce ethanol, thermal acid hydrolysis, enzymatic saccharification and fermentation was carried out. After pretreatment, 38.5, 39.9, 31.0 and 27.5 g/L of monosaccharides were obtained from G. amansii, G. verrucosa, K. alvarezii and E. denticulatum, respectively. Ethanol fermentation was performed with Saccharomyces cerevisiae KCCM 1129 adapted to 80 g/L galactose. The ethanol productions by G. amansii, G. verrucosa, K. alvarezii and E. denticulatum were 18.8 g/L with Y EtOH = 0.49, 19.1 g/L with Y EtOH = 0.48, 14.5 g/L with Y EtOH = 0.47 and 13.0 g/L with Y EtOH = 0.47, respectively. The waste seaweed slurries after the ethanol fermentation were reused to adsorb Cd(II), Pb(II) and Cu(II). Using langmuir isotherm model, Cu(II) had the highest affinity for waste seaweeds with the highest q max and electronegativity values among three heavy metals.

journal_name

Bioprocess Biosyst Eng

journal_title

Bioprocess and biosystems engineering

authors

Sunwoo IY,Ra CH,Jeong GT,Kim SK

doi

10.1007/s00449-016-1571-3

subject

Has Abstract

pub_date

2016-06-01 00:00:00

pages

915-23

issue

6

eissn

1615-7591

issn

1615-7605

pii

10.1007/s00449-016-1571-3

journal_volume

39

pub_type

杂志文章

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