کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6354195 | 1622638 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Wastes from bioethanol and beer productions as substrates for l(+) lactic acid production - A comparative study
ترجمه فارسی عنوان
زباله های تولید بیواتانول و آبجو به عنوان زیر ساخت اسید لاکتیک اسید (+) - مطالعه مقایسه ای
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
Waste substrates from bioethanol and beer productions are cheap, abundant and renewable substrates for biorefinery production of lactic acid (LA) and variability in their chemical composition presents a challenge in their valorisation. Three types of waste substrates, wasted bread and wasted potato stillage from bioethanol production and brewers' spent grain hydrolysate from beer production were studied as substrates for the production of l(+) LA and probiotic biomass by Lactobacillus rhamnosus ATCC 7469. The correlation of the content of free alpha amino nitrogen and the production of LA was determined as a critical characteristic of the waste media for efficient LA production by L. rhamnosus on the substrates which contained equal amount of fermentable sugars. A maximal LA productivity of 1.54 g Lâ1 hâ1 was obtained on wasted bread stillage media, whilst maximal productivities achieved on the potato stillage and brewers' spent grain hydrolysate media were 1.28 g Lâ1 hâ1and 0.48 g Lâ1 hâ1, respectively. A highest LA yield of 0.91 g gâ1 was achieved on wasted bread stillage media, followed by the yield of 0.81 g gâ1 on wasted potato stillage and 0.34 g gâ1 on brewers' spent grain hydrolysate media. The kinetics of sugar consumption in the two stillage substrates were similar while the sugar conversion in brewers' spent grain hydrolysate was slower and less efficient due to significantly lower content of free alpha amino nitrogen. The lignocellulosic hydrolysate from beer production required additional supplementation with nitrogen.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 48, February 2016, Pages 478-482
Journal: Waste Management - Volume 48, February 2016, Pages 478-482
نویسندگان
Aleksandra DjukiÄ-VukoviÄ, Dragana MladenoviÄ, MiloÅ¡ RadosavljeviÄ, SunÄica KociÄ-Tanackov, Jelena Pejin, Ljiljana MojoviÄ,