Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, PR China.
Bioresour Technol. 2013 Feb;129:170-6. doi: 10.1016/j.biortech.2012.10.138. Epub 2012 Nov 5.
This study assessed the anaerobic co-digestion of food waste and cattle manure, in order to identify the key parameters that determine the biogas and methane yield. Results of both batch and semi-continuous tests indicated that the total methane production is enhanced in co-digestion, with an optimum food waste (FM) to cattle manure (CM) ratio of 2. At this ratio, the total methane production in batch tests was enhanced by 41.1%, and the corresponding methane yield was 388 mL/g-VS. In the semi-continuous mode, the total methane production in co-digestion, at the organic loading rate (OLR) of 10 g-VSFW/L/d, increased by 55.2%, corresponding to the methane yield of 317 mL/g-VS. Addition of cattle manure enhanced the buffer capacity (created by NH4+ and VFAs), allowing high organic load without pH control. The C/N ratio and the higher biodegradation of lipids might be the main reasons for the biogas production improvement.
本研究评估了食物垃圾和牛粪的厌氧共消化，以确定决定沼气和甲烷产量的关键参数。批处理和半连续测试的结果均表明，共消化可提高总甲烷产量，食物垃圾（FM）与牛粪（CM）的最佳比例为 2。在此比例下，批处理测试中的总甲烷产量提高了 41.1%，相应的甲烷产量为 388 mL/g-VS。在半连续模式下，共消化在有机负荷率（OLR）为 10 g-VSFW/L/d 时的总甲烷产量增加了 55.2%，相应的甲烷产量为 317 mL/g-VS。添加牛粪可增强缓冲能力（由 NH4+ 和 VFAs 产生），从而在无需 pH 控制的情况下承受高有机负荷。C/N 比和更高的脂质生物降解可能是沼气产量提高的主要原因。
