Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Puzhu Nanlu 30, Jiangpu District, Nanjing 211816, PR China.
Bioresour Technol. 2015 Jun;185:7-13. doi: 10.1016/j.biortech.2015.02.036. Epub 2015 Feb 14.
Batch anaerobic digestion was employed to investigate the performance of the floatable oil (FO) skimmed from food waste (FW) and the effect of different FO concentrations (5, 10, 20, 30, 40 and 50g/L) on biomethane production and system stability. FO and FO+FW were mono-digested and co-digested. The results showed that FO and FO+FW could be well anaerobically converted to biomethane in appropriate loads. For the mono-digestions of FO, the biomethane yield, TS and VS reduction achieved 607.7-846.9mL/g, 69.7-89% and 84.5-92.8%, respectively, when FO concentration was 5-40g/L. But the mono-digestion appeared instability when FO concentration was 50g/L. For the co-digestions of FW+FO, TS and VS reductions reached 70.7-86.1% and 87.5-91.4%, respectively, when FO concentration was 5-30g/L. However, the inhibition occurred when FO concentrations increased to 40-50g/L. The maximal FO loads of 40g/L and 30g/L were hence suggested for efficient mono-digestions and co-digestions of FO and FO+FW.
采用批量厌氧消化技术研究了从食物垃圾（FW）中提取的浮油（FO）的性能，以及不同 FO 浓度（5、10、20、30、40 和 50g/L）对生物甲烷产量和系统稳定性的影响。FO 和 FO+FW 分别进行了单消化和共消化。结果表明，FO 和 FO+FW 可以在适当的负荷下很好地厌氧转化为生物甲烷。对于 FO 的单消化，当 FO 浓度为 5-40g/L 时，FO 的生物甲烷产率、TS 和 VS 减少分别达到 607.7-846.9mL/g、69.7-89%和 84.5-92.8%。但是，当 FO 浓度为 50g/L 时，单消化出现不稳定。对于 FW+FO 的共消化，当 FO 浓度为 5-30g/L 时，TS 和 VS 减少分别达到 70.7-86.1%和 87.5-91.4%。然而，当 FO 浓度增加到 40-50g/L 时，出现了抑制作用。因此，建议将 FO 的最大负荷分别设定为 40g/L 和 30g/L，以实现 FO 和 FO+FW 的高效单消化和共消化。
