TY - JOUR
T1 - Highly digestible nitrogen-enriched straw upgraded by ozone-urea pretreatment
T2 - Digestibility metrics and energy-economic analysis
AU - Ghorbani, Marzieh
AU - Li, Qiao
AU - Kianmehr, Mohammad Hossein
AU - Arabhosseini, Akbar
AU - Sarlaki, Ehsan
AU - Asefpour Vakilian, Keyvan
AU - Varjani, Sunita
AU - Wang, Yajing
AU - Wei, Dan
AU - Pan, Junting
AU - Aghbashlo, Mortaza
AU - Tabatabaei, Meisam
PY - 2022/9
Y1 - 2022/9
N2 - Ozone is a powerful oxidative gas widely used as a green pretreatment to enhance the delignification of cereal straws. Urea pretreatment can enrich straws with nitrogen to make them more accessible to anaerobic microorganisms. This study aimed to evaluate the effect of ozone-urea pretreatment on the digestibility of wheat straw (i.e., physicochemical, nitrogen enrichment, gas production, nutritional value, and surface chemistry). The results of ozone-urea pretreatment were compared with non-pretreated, ozone-pretreated, and urea-pretreated samples. This pretreatment method outperformed the other methods in terms of digestibility metrics. The ozone-urea pretreatment resulted in a 50% reduction in lignin, a 4.2 times increase in crude protein, a 22.5% increase in bonded organic-N, a 2 times increase in 24 h-gas production, and a 43.67% increase in total digestible nutrients compared to the non-pretreated sample. Based on the total digestible nutrients index, one-tonne ozone-urea-pretreated straw would be 70.6 USD cheaper than the non-pretreated one.© 2022 Elsevier Ltd. All rights reserved.
AB - Ozone is a powerful oxidative gas widely used as a green pretreatment to enhance the delignification of cereal straws. Urea pretreatment can enrich straws with nitrogen to make them more accessible to anaerobic microorganisms. This study aimed to evaluate the effect of ozone-urea pretreatment on the digestibility of wheat straw (i.e., physicochemical, nitrogen enrichment, gas production, nutritional value, and surface chemistry). The results of ozone-urea pretreatment were compared with non-pretreated, ozone-pretreated, and urea-pretreated samples. This pretreatment method outperformed the other methods in terms of digestibility metrics. The ozone-urea pretreatment resulted in a 50% reduction in lignin, a 4.2 times increase in crude protein, a 22.5% increase in bonded organic-N, a 2 times increase in 24 h-gas production, and a 43.67% increase in total digestible nutrients compared to the non-pretreated sample. Based on the total digestible nutrients index, one-tonne ozone-urea-pretreated straw would be 70.6 USD cheaper than the non-pretreated one.© 2022 Elsevier Ltd. All rights reserved.
KW - Anaerobic microorganisms
KW - Digestibility
KW - Nitrogen enrichment
KW - Ozone-urea pretreatment
KW - Total digestible nutrients
KW - Wheat straw
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U2 - 10.1016/j.biortech.2022.127576
DO - 10.1016/j.biortech.2022.127576
M3 - RGC 21 - Publication in refereed journal
C2 - 35792329
SN - 0960-8524
VL - 360
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 127576
ER -