Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China.
Waste Manag. 2012 Aug;32(8):1509-15. doi: 10.1016/j.wasman.2012.03.015. Epub 2012 Apr 24.
The purpose of this study was to examine if long-term anaerobic digestion of food waste in a semi-continuous single-stage reactor could be stabilized by supplementing trace elements. Contrary to the failure of anaerobic digestion of food waste alone, stable anaerobic digestion of food waste was achieved for 368 days by supplementing trace elements. Under the conditions of OLR (organic loading rates) of 2.19-6.64 g VS (volatile solid)/L day and 20-30 days of HRT (hydraulic retention time), a high methane yield (352-450 mL CH(4)/g VS(added)) was obtained, and no significant accumulation of volatile fatty acids was observed. The subsequent investigation on effects of individual trace elements (Co, Fe, Mo and Ni) showed that iron was essential for maintaining stable methane production. These results proved that the food waste used in this study was deficient in trace elements.
本研究旨在考察在半连续单级反应器中对食物垃圾进行长期厌氧消化时，添加微量元素是否能使其稳定。与单纯的食物垃圾厌氧消化失败相反，通过添加微量元素，成功地实现了 368 天的稳定食物垃圾厌氧消化。在有机负荷率（OLR）为 2.19-6.64 g VS（挥发性固体）/L·天和水力停留时间（HRT）为 20-30 天的条件下，获得了高的甲烷产量（352-450 mL CH4/g VS（添加）），并且没有观察到挥发性脂肪酸的显著积累。对个别微量元素（Co、Fe、Mo 和 Ni）的后续影响研究表明，铁对于维持稳定的甲烷产量是必需的。这些结果证明，本研究中所用的食物垃圾缺乏微量元素。
