脂质浓度对虹吸驱动自搅拌厌氧反应器中食物垃圾和油脂垃圾嗜热厌氧共消化的影响。
Effects of lipid concentration on thermophilic anaerobic co-digestion of food waste and grease waste in a siphon-driven self-agitated anaerobic reactor.
作者信息
Hu Yong, Kobayashi Takuro, Zhen Guangyin, Shi Chen, Xu Kai-Qin
机构信息
Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, 305-8506, Japan.
School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China.
出版信息
Biotechnol Rep (Amst). 2018 Jun 26;19:e00269. doi: 10.1016/j.btre.2018.e00269. eCollection 2018 Sep.
To investigate the influence of lipid concentration (of total solids, w/w) on anaerobic treatment of food waste under thermophilic condition, a siphon-driven self-agitated anaerobic reactor was operated for 220 days. The average lipid concentration was changed from 12.8% to 59.3% (w/w) step by step. The gas production rate increased from 1.97 to 2.31 L/L/d with lipid concentration increased from 12.8% to 19.7% (w/w), whereas decreased sharply to 0.78 L/L/d when the concentration further increased to 59.3% (w/w). The COD recovery from output at different lipid concentration was analyzed in this study. With the concentration increased from 12.8% to 59.3% (w/w), the percentage of COD recovered as methane gas decreased from 80.9% to 35.4%, while the percentage of COD remained in the effluent was also decreased significantly from 15.5% to 2.60%. The lipid concentration under 40% (w/w) was recommended in the co-digestion of food waste and grease trap waste.
为研究嗜热条件下脂质浓度（占总固体的质量分数，w/w）对食物垃圾厌氧处理的影响，一个虹吸驱动的自搅拌厌氧反应器运行了220天。平均脂质浓度逐步从12.8%变化至59.3%（w/w）。随着脂质浓度从12.8%增加至19.7%（w/w），产气率从1.97升/升/天增加至2.31升/升/天，而当浓度进一步增加至59.3%（w/w）时，产气率急剧降至0.78升/升/天。本研究分析了不同脂质浓度下输出物中的化学需氧量（COD）回收率。随着浓度从12.8%增加至59.3%（w/w），以甲烷气体形式回收的COD百分比从80.9%降至35.4%，而残留在出水中的COD百分比也从15.5%显著降至2.60%。在食物垃圾和隔油池废物的共消化中，建议脂质浓度低于40%（w/w）。
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