Hu Yong, Kobayashi Takuro, Zhen Guangyin, Shi Chen, Xu Kai-Qin
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.
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）。
