کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2892 141 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biogas production from different size fractions separated from solid waste and the accompanying changes in the community structure of methanogenic Archaea
ترجمه فارسی عنوان
تولید بیوگاز از کسرهای اندازه های مختلف از مواد زائد جامد جدا شده و تغییرات همراه آن در ساختار جامعه آرکای متانوژنی
کلمات کلیدی
آزمایش تولید بیوگاز، مواد زائد جامد، قطعه اندازه، هضم بی هوازی تغییرات جامعه میکروبی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی


• Anaerobic stabilization of mechanically-separated municipal solid waste fractions.
• The 20–80 mm size fraction produced the most biogas.
• More diverse substrates supported more diverse microbial communities.
• Both acetoclastic and hydrogenotrophic methanogens generated methane.

There is a need to study the biogas production of waste substrates using routine tests because the characteristics of these substrates influence the kinetics of methane fermentation. In this study, biogas production from different size fractions of solid waste (0–20 mm, 20–40 mm, 20–80 mm, and 40–100 mm) was measured using a 90 days gas production test in mesophilic conditions. How the methanogenic community structure during fermentation corresponds to the chemical composition of the size fractions was determined.Biogas production strongly negatively correlated with the biogas production rate constants (kbiogas) due to differences in the availability of organic substances. Microorganisms in the 20–80 mm size fraction produced the most biogas (252 ± 11 L/kg TS, kbiogas = 0.16 ± 0.04 day−1), which had the highest methane content (ca. 50%), probably because this size fraction had the highest organics content and the most diverse microbial community. In this size fraction, Methanosarcinaceae (acetoclastic microorganisms) and Methanobacteriaceae (hydrogenotrophic microorganisms) were more abundant than in other fractions. The 0–20 mm size fraction produced the least amount of biogas (65 ± 8 L/kg TS); however, its kbiogas was the highest (0.32 ± 0.05 day−1), suggesting that organic matter was easily accessible to the microorganisms. Although the 0–20 mm size fraction is considered to be a mineral fraction that can be used for recultivation, the results of this study suggest that this fraction should be processed first to avoid environmental contamination.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Engineering Journal - Volume 100, 15 August 2015, Pages 30–40
نویسندگان
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