Thermophilic Anaerobic Digestion: Enhanced and Sustainable Methane Production from Co-Digestion of Food and Lignocellulosic Wastes
Thermophilic Anaerobic Digestion: Enhanced and Sustainable Methane Production from Co-Digestion of Food and Lignocellulosic Wastes
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DOI：
10.3390/en11082058
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发表时间：
2018-08-01
期刊：
影响因子：
3.2
通讯作者：
Sani, Rajesh Kumar
中科院分区：
文献类型：
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作者：
David, Aditi;Govil, Tanvi;Sani, Rajesh Kumar
为克服单独消化餐厨垃圾的局限性（挥发性脂肪酸积累和低C：N比），研究了餐厨垃圾（FW）与3种不同木质纤维素废弃物（玉米秸秆（CS）、大米草（PCG）和未漂白纸（UBP））的高温厌氧消化共消化。使用一个丰富的嗜热产甲烷财团，所有的食物和木质纤维素废物的混合物表现出积极的协同作用的共消化。在60 ℃（100 rpm）下培养30天后，使用FW-PCG-CS的组合实现了305.45 Lkg（-1）挥发性固体（VS）的最高甲烷产率，随后使用FW-PCG的混合物实现了279.31 Lkg（-1）VS。这两种共消化混合物的相应挥发性固体减少分别为68%和58%。这项研究表明，减少水力停留时间的甲烷生产使用FW和LW。
This article aims to study the codigestion of food waste (FW) and three different lignocellulosic wastes (LW) (Corn stover (CS), Prairie cordgrass (PCG), and Unbleached paper (UBP)) for thermophilic anaerobic digestion to overcome the limitations of digesting food waste alone (volatile fatty acids accumulation and low C:N ratio). Using an enriched thermophilic methanogenic consortium, all the food and lignocellulosic waste mixtures showed positive synergistic effects of codigestion. After 30 days of incubation at 60 degrees C (100 rpm), the highest methane yield of 305.45 Lkg(-1) volatile solids (VS) was achieved with a combination of FW-PCG-CS followed by 279.31 Lkg(-1) VS with a mixture of FW-PCG. The corresponding volatile solids reduction for these two co-digestion mixtures was 68% and 58%, respectively. This study demonstrated a reduced hydraulic retention time for methane production using FW and LW.