کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1269008 1497425 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of volatile fatty acids concentration for photofermentative hydrogen production by a consortium
ترجمه فارسی عنوان
بهینه سازی غلظت اسیدهای چرب فرار برای تولید هیدروژن تولید شده توسط یک کنسرسیوم
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• A photofermentative hydrogen-producing consortium was evaluated using VFA.
• Predominant bacteria in the consortium was Rhodopseudomonas palustris.
• Propionic acid and the increase of pH decrease the hydrogen production.
• The maximum hydrogen production rate was 6.1 mL h−1 L−1.
• The maximum amount of hydrogen produced was 108.8 mmol L−1.

The optimum concentration of volatile fatty acids that maximized the hydrogen production by photobacteria was determined using Box–Behnken and Central Composite designs. A photofermentative hydrogen-producing consortium, obtained from a bio-electrochemical system, was used as inoculum. Rhodopseudomonas palustris was identified in the consortium. Experiments were conducted in anaerobic batch reactors at 30–35 °C and illuminated by a constant radiation of 5000 lux. Hydrogen production decreased when propionic acid is higher than 715 mg L−1. Ammonia formation was responsible for the pH increase. A maximum hydrogen production rate of 6.1 mL d−1 Lculture−1 h−1 and a maximal amount of hydrogen produced of 108.8 mmol Lculture−1 were obtained. Optimal concentrations of acetic, propionic and butyric acids were 1200 mg L−1, 715 mg L−1 and 1571 mg L−1, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 48, 28 December 2015, Pages 17212–17223
نویسندگان
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