进料方式和稀释度对食物垃圾厌氧消化性能和微生物群落种群的影响。
Effect of feeding mode and dilution on the performance and microbial community population in anaerobic digestion of food waste.
机构信息
Sustainable Environmental Process Research Institute, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Department of Civil, Environmental and Architectural Engineering, Korea University, Anam-Dong, Seongbuk-gu, Seoul 02841, Republic of Korea.
Sustainable Environmental Process Research Institute, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Department of Environmental Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
出版信息
Bioresour Technol. 2018 Jan;248(Pt A):134-140. doi: 10.1016/j.biortech.2017.07.025. Epub 2017 Jul 8.
The effect of feeding mode and dilution was studied in anaerobic digestion of food waste. An upflow anaerobic digester with a settler was fed at six different organic loading rates (OLRs) from 4.6 to 8.6kgCOD/m/d for 200days. The highest methane productivity of 2.78LCH/L/d was achieved at 8.6kgCOD/m/d during continuous feeding of diluted FW. Continuous feeding of diluted food waste showed more stable and efficient performance than stepwise feeding of undiluted food waste. Sharp increase in propionate concentration attributed towards deterioration of the digester performances in stepwise feeding of undiluted food waste. Microbial communities at various OLRs divulged that the microbial distribution in the continuous feeding of diluted food waste was not significantly perturbed despite the increase of OLR up to 8.6kgCOD/m/d, which was contrast to the unstable distribution in stepwise feeding of undiluted food waste at 6.1kgCOD/m/d.
本研究考察了进料方式和稀释度对食物垃圾厌氧消化的影响。采用具有沉降器的上流式厌氧消化器，在 200 天内以 4.6 至 8.6kgCOD/m/d 的六个不同有机负荷率（OLR）进料。在连续稀释 FW 进料下，获得了 2.78LCH/L/d 的最高甲烷产率。与连续稀释的食物垃圾相比，连续稀释的食物垃圾的进料具有更稳定和高效的性能。在逐步进料未稀释的食物垃圾中，丙酸浓度的急剧增加导致了消化器性能的恶化。在不同 OLR 下的微生物群落表明，尽管 OLR 增加到 8.6kgCOD/m/d，但连续稀释食物垃圾的微生物分布并没有受到显著干扰，这与逐步进料未稀释食物垃圾在 6.1kgCOD/m/d 时不稳定的分布形成了对比。
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