A simple recovery process for biodegradable plastics accumulated in cyanobacteria treated with ionic liquids.
Appl Microbiol Biotechnol
; 99(4): 1647-53, 2015 Feb.
Article
em En
| MEDLINE
| ID: mdl-25432673
ABSTRACT
Here, we proposed a simple recovery process for poly(3-hydroxybutyrate) (PHB) accumulated in cyanobacteria by using ionic liquids (ILs), which dissolve cyanobacteria but not PHB. First, we investigated the effects of IL polarity on hydrogen-bonding receipt ability (ß value) and hydrogen-bonding donating ability (α value) and evaluated the subsequent dissolution of cyanobacteria. We found that ILs having α values higher than approximately 0.4 and ß values of approximately 0.9 were suitable for dissolution of cyanobacteria. In particular, 1-ethyl-3-methylimidazolium methylphosphonate ([C2mim][MeO(H)PO2]) was found to dissolve cyanobacteria components, but not PHB. Thus, we verified that PHB produced in cyanobacteria could be separated and recovered by simple filtering after dissolution of cyanobacteria in [C2mim][MeO(H)PO2]. Using this technique, more than 98 % of PHB was obtained on the filter as residues separated from cyanobacteria. Furthermore, [C2mim][MeO(H)PO2] maintained the ability to dissolve cyanobacteria after a simple recycling procedure.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Poliésteres
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Cianobactérias
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Líquidos Iônicos
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Plásticos Biodegradáveis
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Hidroxibutiratos
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article