通过选择固定化表面来优化厌氧消化以提高甲烷产量。
Optimizing anaerobic digestion by selection of the immobilizing surface for enhanced methane production.
机构信息
Department of Water and Environmental Management, University of Bristol, UK.
出版信息
Bioresour Technol. 2012 Sep;120:248-55. doi: 10.1016/j.biortech.2012.06.042. Epub 2012 Jun 21.
Maximizing methane production while maintaining an appreciable level of process stability is a crucial challenge in the anaerobic digestion industry. In this study, the role of six parameters: the type of immobilizing supports, loading rate, inoculum levels, C:N ratio, trace nutrients concentrations and mixing rate, on methane production were investigated under thermophilic conditions (55 ± 1°C) with synthetic substrate medium. The immobilizing supports were Silica gel, Sand, Molecular Sieve and Dowex Marathon beads. A Taguchi Design of Experiment (DOE) methodology was employed to determine the effects of different parameters using an L(16) orthogonal array. Overall, immobilizing supports influenced methane production substantially (contributing 61.3% of the observed variation in methane yield) followed by loading rate and inoculum which had comparable influence (17.9% and 17.7% respectively). Optimization improved methane production by 153% (from 183 to 463 ml CH(4)l(-1)d(-1)).
在厌氧消化行业中，最大限度地提高甲烷产量，同时保持相当水平的工艺稳定性是一个关键的挑战。在这项研究中，六种参数（固定化载体的类型、加载率、接种物水平、碳氮比、痕量营养素浓度和混合率）在 55±1°C 的高温条件下，用合成基质培养基对甲烷产量的影响进行了研究。固定化载体为硅胶、沙子、分子筛和 Dowex Marathon 珠。采用田口设计实验（DOE）方法，使用 L(16)正交数组确定不同参数的影响。总的来说，固定化载体对甲烷产量有很大的影响（对甲烷产量的观测变化贡献了 61.3%），其次是加载率和接种物，它们的影响相当（分别为 17.9%和 17.7%）。优化提高了甲烷产量 153%（从 183 增加到 463 ml CH(4)l(-1)d(-1)）。
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