abstract
Glutamic acid (Glu) has potential as feedstock for bulk chemicals production. It has also
been listed as one of the top twelve chemicals derived from biomass. Large amounts of
cheaper Glu can be made available by enabling its production from biomass by-products,
such as wheat dried distillers grains with solubles (DDGS) derived from ethanol produc-
tion. The aim of this study was to develop a new method for Glu production from biomass.
Wheat gluten was used to represent wheat DDGS. To reduce chemicals usage, several
methods were evaluated. These included enzymatic, dilute acid, and a combination of
enzymatic and dilute acid hydrolysis. The separate enzymatic and dilute acid hydrolysis
(1 M HCl; 95 C) resulted in yields of 48% and 46% Glu, respectively. However, the combi-
nation of enzymatic and dilute acid hydrolysis resulted in a much higher yield of 70% Glu
and 10% pyroglutamic acid thereby opening up new possibilities for the industrial pro-
duction of Glu from biomass.
abstractGlutamic acid (Glu) has potential as feedstock for bulk chemicals production. It has alsobeen listed as one of the top twelve chemicals derived from biomass. Large amounts ofcheaper Glu can be made available by enabling its production from biomass by-products,such as wheat dried distillers grains with solubles (DDGS) derived from ethanol produc-tion. The aim of this study was to develop a new method for Glu production from biomass.Wheat gluten was used to represent wheat DDGS. To reduce chemicals usage, severalmethods were evaluated. These included enzymatic, dilute acid, and a combination ofenzymatic and dilute acid hydrolysis. The separate enzymatic and dilute acid hydrolysis(1 M HCl; 95 C) resulted in yields of 48% and 46% Glu, respectively. However, the combi-nation of enzymatic and dilute acid hydrolysis resulted in a much higher yield of 70% Gluand 10% pyroglutamic acid thereby opening up new possibilities for the industrial pro-duction of Glu from biomass.
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