کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4997550 1459911 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Leachate flush strategies for managing volatile fatty acids accumulation in leach-bed reactors
ترجمه فارسی عنوان
استراتژی های کشف شلغم برای مدیریت انباشت اسیدهای چرب فرار در راکتورهای حلقوی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


- The co-digestion of easily- and slowly-degradable substrates is assessed in LBRs.
- A strategy to manage leachate flush and optimize methane production is proposed.
- A high leachate flush-rate at the start-up enhances substrate degradation rates.
- After methanogenesis started, leachate flush-rate can be reduced.
- Mature LBR can be used to degrade external VFAs after the methane production peak.

In anaerobic leach-bed reactors (LBRs) co-digesting an easily- and a slowly-degradable substrate, the importance of the leachate flush both on extracting volatile fatty acids (VFAs) at the beginning of newly-started batches and on their consumption in mature reactors was tested. Regarding VFA extraction three leachate flush-rate conditions were studied: 0.5, 1 and 2 L kg−1 TS d−1. Results showed that increasing the leachate flush-rate during the acidification phase is essential to increase degradation kinetics. After this initial phase, leachate injection is less important and the flush-rate could be reduced. The injection in mature reactors of leachate with an acetic acid concentration of 5 or 10 g L−1 showed that for an optimized VFA consumption in LBRs, VFAs should be provided straight after the methane production peak in order to profit from a higher methanogenic activity, and every 6-7 h to maintain a high biogas production rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 232, May 2017, Pages 93-102
نویسندگان
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