Li Y Y, Sasaki H, Yamashita K, Seki K, Kamigochi I
Environmental Technology R&D Center, ATAKA Construction & Engineering Co., Ltd., 9-1, Sganakadai, Kizu-cho, Souraku-gun, Kyoto 619-0223, Japan.
Water Sci Technol. 2002;45(12):143-50.
This paper presents an experimental study on anaerobic degradation of lipids-rich food wastes by using the high solids co-digestion process. The experiments were conducted under mesophilic (35 degrees C) and thermophilic (55 degrees C) condition, respectively, by using a semi-continuous flow completely mixed reactor. The influent TS level was controlled at around 10%, while the hydraulic retention time (HRT) was changed from 15 days to 7.5 days. The lipids (fats or oil and grease) content in the influent TS was changed from 8% to 40% by adding salad oil (vegetable) and lard (animal) to the food wastes. The result of this study showed that the food wastes containing high lipids content was effectively degraded by the high solids co-digestion process and over 85% of lipid was degraded to biogas with 60-65% of methane. In addition, thermophilic methane fermentation was more effective for reducing lipids and had more higher loading capacity compared with mesophilic condition.
本文介绍了一项利用高固体物共消化工艺对富含脂质的食物垃圾进行厌氧降解的实验研究。实验分别在中温（35℃）和高温（55℃）条件下，使用半连续流完全混合反应器进行。进水总固体（TS）水平控制在10%左右，同时水力停留时间（HRT）从15天变为7.5天。通过向食物垃圾中添加色拉油（植物油）和猪油（动物油），使进水TS中的脂质（脂肪或油脂）含量从8%变为40%。本研究结果表明，高固体物共消化工艺能有效降解含高脂质的食物垃圾，超过85%的脂质被降解为沼气，其中甲烷含量为60 - 65%。此外，与中温条件相比，高温甲烷发酵在减少脂质方面更有效，且具有更高的负荷能力。
