Anaerobic digestion is an environmentally sustainable technology for converting a variety of organic solid feedstocks to energy in the form of methane. To improve methane yield, the digestion of more than one waste is commonly applied. This study aimed to investigate the dry anaerobic co-digestion (TS of 20%) of vegetable wastes (VW) and animal manures (cow manure (CM) and poultry manure (PM)) through conducting biochemical methane potential (BMP) assays at different substrate to inoculum (S/I) ratio. Fractionation and fluorescence analyses showed that organic matter of VW was less accessible and less complex compared to that of CM and PM. The highest methane yields of mono-digestion experiments were registered with S/I 0.5. Best results of methane yield were observed by the co-digestion of VW and CM (284 mL/g VS), which was about 2.3-fold higher than that of VW mono-fermentation. This finding was confirmed at a laboratory-scale leach bed reactor. Result showed an increase of biogas yield from 220 to 445 mL/g VS, during mono and co-digestion, respectively. The co-digestion of VW and CM mixture led to the enhancement of both methane yield and digestate quality in comparison to mono-digestion.

厌氧消化是一种环境可持续的技术，可将多种有机固体原料转化为甲烷形式的能量。为了提高甲烷产量，通常要消化一种以上的废物。这项研究旨在通过在不同位置进行生化甲烷潜力（BMP）分析来研究蔬菜废物（VW）和动物粪便（牛粪（CM）和家禽粪便（PM））的干式厌氧消化（TS的20％）底物与接种物（S / I）的比率。分馏和荧光分析表明，与CM和PM相比，大众有机物的可及性和复杂性较低。单消化实验的最高甲烷产率记录为S / I 0.5。大众和CM（284 mL / g VS）共同消化，观察到甲烷产量的最佳结果，约为2。比大众单发酵高3倍。这一发现在实验室规模的浸出床反应器中得到了证实。结果表明，在单消化和共消化期间，沼气产量分别从220 mL / g VS增加到445 mL / gVS。与单消化相比，大众和CM混合物的共消化导致甲烷产量和消化质量的提高。