Use of a Nylon Manufacturing Waste as an Industrial Fermentation Substrate
AUTOR(ES)
Ramsay, Bruce A.
RESUMO
Nonvolatile residue (NVR), a waste stream from the manufacture of nylon 6′6′, contains mainly small carboxylic acids and alcohols, making it a potential fermentation substrate. Above a concentration of 1.3% (wt/vol), NVR inhibited the growth of all microorganisms tested. The most inhibitory of the major NVR components were the monocarboxylic acids (C4 to C6) and ε-caprolactone. The inhibitory effects of NVR could be avoided by using a carbon-limited chemostat. Microorganisms were found that could use all of the major NVR components as carbon and energy sources. One such organism, Pseudomonas cepacia, was grown in a carbon-limited chemostat with a medium feed concentration of 20.5 g of NVR liter−1. At a dilution rate of 0.14 h−1 the yield of biomass (Yx/s, where x is biomass produced and s is substrate used) from NVR was 18% (neglecting the water content of NVR). It was concluded that NVR would be a suitable carbon source for certain industrial fermentation processes such as the production of poly-β-hydroxybutyric acid.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=203420Documentos Relacionados
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