INRA, UR50, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, Narbonne F-11100, France.
INRA, UR50, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, Narbonne F-11100, France.
Bioresour Technol. 2014 Apr;158:300-6. doi: 10.1016/j.biortech.2014.02.055. Epub 2014 Feb 23.
In the context of biofuel production from marine microalgae, anaerobic digestion has the potential to make the process more sustainable and to increase energy efficiency. However, the use of salt-containing microalgae organic residues entails the presence of salts which inhibits methanogenesis. The search for suitable anaerobic microbial consortium adapted to saline conditions can boost the anaerobic conversion into methane. The anaerobic digestion performance of three different anaerobic microbial consortia was assessed in batch tests at different salinities between 15 and 150 g L(-1) and for three successive substrate additions. After an acclimation period, the methane (CH4) yield of the halophilic methanogens at 35 g L(-1) of salinity was close to the reference value without salt addition. Above 75 g L(-1) of salinity, methanogenesis was considerably slowed down. The results underline that methane production from halophilic sediment can be envisaged and promoted for practical application at a seawater concentration.
在利用海洋微藻生产生物燃料的背景下，厌氧消化具有提高可持续性和能源效率的潜力。然而，含盐水生微藻有机残留物的使用会导致盐的存在，从而抑制产甲烷作用。寻找适合盐度条件的厌氧微生物群落可以促进将厌氧转化为甲烷。在不同盐度（15 到 150 g/L）和三个连续底物添加的分批测试中，评估了三种不同厌氧微生物群落的厌氧消化性能。在适应期后，在 35 g/L 盐度下嗜盐产甲烷菌的甲烷（CH4）产量接近无盐添加的参考值。盐度高于 75 g/L 时，产甲烷作用明显减慢。研究结果表明，从嗜盐沉积物中生产甲烷可以在海水浓度下进行实际应用，并可以加以推广。
