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首页> 外文期刊>Energy Conversion & Management >Dry thermophilic semi-continuous anaerobic digestion of food waste: Performance evaluation, modified Gompertz model analysis, and energy balance
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Dry thermophilic semi-continuous anaerobic digestion of food waste: Performance evaluation, modified Gompertz model analysis, and energy balance

机译：食品垃圾的干热半连续厌氧消化：性能评估，改进的Gompertz模型分析和能量平衡

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A thermophilic, dry semi-continuous anaerobic digestion (DScAD) method was used to effectively transform food waste (FW) into renewable energy. This study aims to thoroughly evaluate the system performance and model simulation to predict biogas production, intermediate products and their outcomes, energy recovery potential, and energy balance, while operating with organic loading rates ranging from 2.3 to 9.21 kg-TS/m(3) day. The results indicate that volatile solids (VS) reduction and biogas production both improved as the organic loading rates (OLR) increased, and the cost of FW valorization remained low. The greatest VS reduction achieved was 87.01%, associated with 170 m(3) of biogas yield per ton of sludge (69% methane) at an ORL of 9.21 +/- 0.89 kg-TS/m(3) day (8.62 0.34 kg-VS/m(3) day) although the amounts of ammonia (3700 mg/L), hydrogen sulfide (420 ppm), and total volatile fatty acids (7101 mg/L) during fermentation were relatively high. Furthermore, 75% of total energy requirement for the system could be recovered via biomethane production, resulting in a considerably reduced specific energy supply (kW h/ton of treating FW). The results suggest that a modified Gompertz model is suitable for estimating the biogas and methane production potential and rate. The results also reveal that the DScAD of FW at 55 degrees C is a reliable, stable, and robust option for both solids reduction and energy recovery via biogas generation. (C) 2016 Elsevier Ltd. All rights reserved.
机译：高温干燥半连续厌氧消化（DScAD）方法被用来有效地将食物垃圾（FW）转化为可再生能源。这项研究旨在彻底评估系统性能和模型仿真，以预测沼气产量，中间产品及其结果，能量回收潜力和能量平衡，同时以2.3至9.21 kg-TS / m的有机负荷速率运行（3）天。结果表明，随着有机负荷率（OLR）的增加，挥发性固体（VS）的减少和沼气的产生均得到改善，而FW增值的成本仍然较低。在9.21 +/- 0.89 kg-TS / m（3）天（8.62 0.34 kg）的ORL下，实现的最大VS降低为87.01％，与每吨污泥（69％甲烷）的沼气产量为170 m（3） -VS / m（3）天），尽管发酵过程中氨（3700 mg / L），硫化氢（420 ppm）和总挥发性脂肪酸（7101 mg / L）的含量相对较高。此外，该系统的总能量需求的75％可通过生产生物甲烷来回收，从而显着降低了比能量供应（千瓦时/处理FW的吨）。结果表明，改进的Gompertz模型适用于估算沼气和甲烷的生产潜力和速率。结果还显示，在55摄氏度下，FW的DScAD是可靠的，稳定的和坚固的选择，可通过沼气生成固体并进行能量回收。 （C）2016 Elsevier Ltd.保留所有权利。

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