Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain.
Bioresour Technol. 2012 Nov;123:488-94. doi: 10.1016/j.biortech.2012.06.113. Epub 2012 Jul 7.
The anaerobic digestion of three microalgae mixtures was evaluated at different substrate to inoculum (S/I) ratios (0.5, 1 and 3), biomass concentrations (3, 10 and 20gTS/kg) and pretreatments (thermal hydrolysis, ultrasound and biological treatment). An S/I ratio of 0.5 and 10gTS/kg resulted in the highest final methane productivities regardless of the microalgae tested (ranging from 188 to 395mL CH(4)/gVS(added)). The biological pretreatment supported negligible enhancements on CH(4) productivity, while the highest increase (46-62%) was achieved for the thermal hydrolysis. The optimum temperature of this pretreatment depended on the microalgae species. The ultrasound pretreatment brought about increases in CH(4) productivity ranging from 6% to 24% at 10,000kJ/kgTS, without further increases at higher energy inputs. The results here obtained confirmed the lack of correlation between the solubilization degree and the methane enhancement potential and pointed out that anaerobic digestion of algae after thermal pretreatment is a promising technology for renewable energy production.
评价了不同底物与接种物（S/I）比例（0.5、1 和 3）、生物质浓度（3、10 和 20gTS/kg）和预处理（热解、超声和生物处理）下三种微藻混合物的厌氧消化。无论测试的微藻如何（188 至 395mL CH(4)/gVS(added)），S/I 比为 0.5 和 10gTS/kg 均导致最高的最终甲烷产率。生物预处理对 CH(4)产率的支持可忽略不计，而热解的增加最高（46-62%）。该预处理的最佳温度取决于微藻种类。超声预处理在 10,000kJ/kgTS 时可使 CH(4)产率提高 6%至 24%，而在更高的能量输入时则没有进一步提高。这里获得的结果证实了溶解程度与甲烷增强潜力之间缺乏相关性，并指出藻类在热预处理后的厌氧消化是可再生能源生产的一项有前途的技术。
