Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
Department of Environmental Science, Faculty of Natural Resources and Environment, Ferdowsi University of Mashhad, Mashhad, Iran.
Bioresour Technol. 2018 Jul;260:421-426. doi: 10.1016/j.biortech.2018.03.112. Epub 2018 Mar 31.
The effect of drinking water treatment sludge (DWTS) as a mixture additive, on biogas and methane production from food waste was studied. Mesophilic anaerobic digestion of food waste with 5 concentrations of DWTS (0, 2, 6, 12, and 18 ppm) was carried out. It was found that DWTS can significantly enhance biogas and methane yield. The highest biogas (671 Nml/g VS) as well as methane yield (522 Nml/g VS) was observed when 6 mg/kg DWTS was added. This is equal to 65 and 58 percent increase in comparison with the control digester. The calculated lag time for methane was found to be in between 3.3 and 4.7 days. The DWTS also reduced the lag phase and retention time. The biogas experimental data was fitted with the modified Gompertz and the first-order kinetic models with R higher than 0.994 and 0.949, respectively. The ratio of the experimental biogas production to the theoretical biogas production (ɛ) for control sample was 0.53 while for other samples containing additive were higher than 0.78.
研究了饮用水处理污泥（DWTS）作为混合物添加剂对食物垃圾沼气和甲烷生成的影响。进行了 5 个 DWTS 浓度（0、2、6、12 和 18ppm）的中温厌氧消化食物垃圾实验。结果表明，DWTS 可显著提高沼气和甲烷产量。当添加 6mg/kg 的 DWTS 时，沼气（671Nml/gVS）和甲烷产量（522Nml/gVS）最高，与对照消化器相比，分别增加了 65%和 58%。计算得出甲烷的滞后时间在 3.3 到 4.7 天之间。DWTS 还缩短了滞后期和停留时间。用修正的 Gompertz 和一级动力学模型对沼气实验数据进行拟合，R 值分别大于 0.994 和 0.949。对照样品的实验沼气产量与理论沼气产量的比值（ɛ）为 0.53，而含有添加剂的其他样品的值均高于 0.78。
