کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7067882 | 1459887 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of temperature and substrate concentration on degradation rates of acetate, propionate and hydrogen and their links to microbial community structure
ترجمه فارسی عنوان
تاثیر دما و غلظت سوبستات بر میزان تخریب استات، پروپیونات و هیدروژن و ارتباط آنها با ساختار جامعه میکروبی
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کلمات کلیدی
دما و بستر، استات پروپیونات، هیدروژن، ساختار جامعه میکروبی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The present study investigates the conversion of acetate, propionate and hydrogen consumption linked to the microbial community structure and related to temperature and substrate concentration. Biogas reactors were continuously fed with coffee powder (20â¯g-COD/L) or acetate (20, 40, and 60â¯g-COD/L) and operated for 193â¯days at 37â¯Â°C or 55â¯Â°C conditions. Starting HRT was 23â¯days which was then reduced to 7â¯days. The kinetics of acetate and propionate degradation and hydrogen consumption rates were measured in batch assays. At HRT 7â¯days, the degradation rate of propionate was higher in thermophilic batches, while acetate degradation rate was higher at mesophilic conditions. The gaseous hydrogen consumption in acetate reactors increased proportionally with temperature and substrate concentration, while the dissolved hydrogen was not affected. The relative high abundance of hydrogentrophic methanogens indicated that the methanogenesis was directed towards the syntrophic acetate oxidation pathway at high acetate concentration and high temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 256, May 2018, Pages 44-52
Journal: Bioresource Technology - Volume 256, May 2018, Pages 44-52
نویسندگان
Jing Zhao, Maria Westerholm, Wei Qiao, Dongmin Yin, Shaojie Bi, Mengmeng Jiang, Renjie Dong,