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• W2546604437 endingPage "1232" @default.
• W2546604437 startingPage "1222" @default.
• W2546604437 abstract "There is a growing trend toward considering municipal solid waste (MSW) with a large organic fraction as a source of renewable energy using a dry anaerobic digestion (AD) process. Pre-aeration is effective in improving the dry AD of MSW. However, due to a lack of information regarding the modification of organic components during pre-aeration and the relationship with the subsequent AD, the mechanisms and optimum strength of this process remain unclear. In this study, the role of different short-term pre-aeration durations (4, 8, and 14 days) in dry AD of MSW was evaluated in batch-tests, with a focus on changes in the organic components during pre-aeration and their impact on the subsequent spectral evolution of dissolved organic matter (DOM) and bulk performance. Dry AD of MSW operated effectively after the 8-day pre-aeration. The accelerated degradation of proteins during pre-aeration is critical for the subsequent AD, by reducing the organic loading and providing a buffer for the ammonia generated. A favorable methanogenesis, facilitated by pre-aeration, rapidly decreased protein-like fluorescent matter by ∼2.8 times, by converting it to stable humic- and fulvic-like groups. MSW with an 8-day pre-aeration produced the highest biogas yield (192.4 NL/kg dry matter), representing ∼24.9% of the initial carbon recovered as methane. Excessive pre-aeration of 14 days decreased the biogas yield by ∼33%. An insufficient pre-aeration led to an excessive butyric-type acidification, with protein-like matter dominating the bulk DOM (∼81% of total fluorescence intensity). Multivariate analysis methods confirmed that spectroscopic indicators could evaluate the stability of dry AD." @default.
• W2546604437 created "2016-11-11" @default.
• W2546604437 creator A5010491128 @default.
• W2546604437 creator A5014361541 @default.
• W2546604437 creator A5077290356 @default.
• W2546604437 date "2017-04-01" @default.
• W2546604437 modified "2023-09-24" @default.
• W2546604437 title "Short-term pre-aeration applied to the dry anaerobic digestion of MSW, with a focus on the spectroscopic characteristics of dissolved organic matter" @default.
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• W2546604437 doi "https://doi.org/10.1016/j.cej.2016.11.020" @default.
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