Quantitative characterization of enzyme adsorption and hydrolytic performance for ultrafine grinding pretreated corn stover
2017
Zhang, Haiyan | Chen, Longjian | Li, Junbao | Lu, Minsheng | Han, Lujia
Quantitative analysis of enzyme adsorption and hydrolysis were performed for sieve-based grinding corn stover (SGCS) and ultrafine grinding corn stover (UGCS)1SGCS: Sieve-based grinding corn stover; UGCS: ultrafine ground corn stover.1 with different enzyme consumptions. The UGCS presented significantly higher enzyme adsorption quantity (5.15mg/g for UGCS, 1.33mg/g for SGCS), higher glucose yield (49.75% for UGCS, 28.75% for SGCS) under 20FPU/g and higher binding enzyme proportion (41.32% for UGCS, 10.64% for SGCS under 5FPU/g) which can be attributed to the more accessible microstructure properties. The relationship between enzyme adsorption and hydrolytic production was directly proportional for SGCS (GY1=21.04×AQ1+1.86 (R2=0.95)) while was exponential for UGCS (GY2=49.42×(1−e−0.57×AQ2) (R2=0.99)),2GY1 and GY2: glucose yield of SGCS and UGCS; AQ1 and AQ2: adsorption quantities of SGCS and UGCS.2 indicating that overmuch enzyme consumption was not advisable for UGCS at economical aspect.
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