Optimization of dilute sulfuric acid, aqueous ammonia, and steam explosion as the pretreatments steps for distillers' dried grains with solubles as a potential fermentation feedstock

Iram A., ÇEKMECELİOĞLU D., Demirci A.

BIORESOURCE TECHNOLOGY, cilt.282, ss.475-481, 2019 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 282
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.biortech.2019.03.009
  • Dergi Adı: BIORESOURCE TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.475-481
  • Anahtar Kelimeler: DDGS, Dilute acid pretreatment, Aqueous ammonia, Steam explosion, Pretreatment, Corn ethanol, Lignocellulosic biomass, LIGNOCELLULOSIC BIOMASS, HYDROGEN-PRODUCTION, HYDROLYSIS, FIBER, AFEX, FRACTIONATION, MOISTURE, DESIGN, FUNGI, DDGS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Distillers' dried grains with solubles (DDGS) is the by-product of bioethanol production from starch-rich grains through dry-mill fermentation. In this study, dilute sulfuric acid hydrolysis, aqueous ammonia, and steam explosion as the pre-treatment methods were optimized. The central composite response surface methodology (RSM) design was used for optimization of dilute acid pretreatment, aqueous ammonia pretreatment. The steam explosion trials were evaluated. The results show that the dilute acid pretreatment at 121 degrees C is the most effective way of obtaining simple fermentable sugars (0.382 g/g DDGS). The levels of furfural and HMF was also 5.2 mg/g DDGS) and 1.6 mg/g DDGS, respectively, in the dilute sulfuric acid pretreated DDGS. On the other hand, maximum sugar yield for ammonia pretreatment was 0.129 g/g DDGS and 0.055 g/g DDGS for the steam pretreatment, while no significant amounts of furfural and HMF were observed for these two pretreatment methods.