| Autor: |
Еkaterina I. Kashcheyeva, Еkaterina А. Skiba, Vladimir N. Zolotukhin, Vera V. Budaeva |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
BioResources. 15:1575-1586 |
| ISSN: |
1930-2126 |
| DOI: |
10.15376/biores.15.1.1575-1586 |
| Popis: |
The pretreatment of lignocellulosic bioresources is a key step in obtaining fermentable sugars. The present study explored the recycling of an HNO3 cooking solution during one-step chemical pretreatment of oat hulls and examined the enzymatic hydrolysis performance of the resultant substrates. Two series of experiments on solution recycling were performed: stabilization and experimental elevation of HNO3 concentration by adding 70 wt% HNO3. When the HNO3 concentration was stabilized at 4.4 wt%, the solution could be used five times. Meanwhile, when the HNO3 concentration was experimentally elevated from 4.4 wt% to 5.6 wt% (at the tenth pretreatment) by adding 70 wt% HNO3, the cooking solution could be used ten times. The yield of reducing sugars on a hydrolyzables content basis was 95% to 99% for ten substrates. In this case, the lignin contents of the substrates did not increase and had no adverse effect on the enzymatic hydrolysis performance. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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