کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7063029 | 1459784 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Anaerobic mono-digestion of lucerne, grass and forbs - Influence of species and cutting frequency
ترجمه فارسی عنوان
یکنواخت هضم بی هوازی از لوسیون، چمن و فلفل - تأثیر گونه ها و فرکانس برش
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کلمات کلیدی
مونو هضم چند گونه فرکانس برش، عملکرد متان، مواد مغذی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
In the present study, biogas potentials of multispecies swards including grass, lucerne, caraway, ribwort plantain and chicory from two- and four-cut regimes (Mix-2 and Mix-4) for mono-digestion applying batch and continuous modes under lab-scale conditions were investigated. The gas yields in terms of volatile solids (VS) loaded from Mix-2 and Mix-4 were compared with pure stand lucerne from the four cuts regime (Lu-4). The batch test results indicate that methane yield on a VS basis was highest from Mix-4 (295â¯Lâ¯kgâ1), followed by Mix-2 (281â¯Lâ¯kgâ1) and Lu-4 (255â¯Lâ¯kgâ1). The results were confirmed with continuous experiments, during which the reactor digesting Mix-4 was stable throughout the experiment with low ammonia and volatile fatty acid (VFA) concentration. Meanwhile, mono-digestion of Lu-4 led to elevated VFA levels, even at a comparatively low organic loading rate of 1.76â¯gâ¯Lâ1â¯dâ1 but it was not possible to ascertain whether this was due to organic overload alone or if high ammonia levels during Lu-4 digestion were contributing to the reduced performance. It was found that four cuts per year was suitable for a lab-scale mono-digestion system as the substrate was less fibrous and has lower dry matter content, which minimize blockage during feeding and digestate unloading. Micronutrient concentrations, including cobalt, nickel and molybdenum decreased over time during the continuous experiments and were critically lower than the optimum concentration required by methanogens, particularly in Mix-4, but the gas yields of the reactor treating this substrate showed no decrease over time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 109, February 2018, Pages 199-208
Journal: Biomass and Bioenergy - Volume 109, February 2018, Pages 199-208
نویسندگان
Radziah Wahid, Lu Feng, Wen-Feng Cong, Alastair James Ward, Henrik Bjarne Møller, Jørgen Eriksen,