论文标题
将微生物电化学技术与厌氧消化相结合，以加速丙酸酯降解
Integrating microbial electrochemical technologies with anaerobic digestion to accelerate propionate degradation
论文作者
论文摘要
这项研究的目的是评估微生物电化学技术（MET）与厌氧消化（AD）的整合，以克服由丙酸酯积累引起的AD限制。该研究的重点是理解接种物在多大程度上从丙酸降解，甲烷产生和微生物种群动态的角度从综合系统（AD-MET）的行为产生影响。使用了三种不同的接种物：两种来自环境来源（厌氧污泥和河流沉积物），另一个来自富含丙酸丙酸酯降解的预先富集的电活性财团。与期望相反，从长远来看，接种了富含富集的财团的反应器无法保持其最初的良好性能，并且在运行三个月后，生物电气化学活性崩溃了。相反，通过厌氧污泥接种反应器，尽管它需要相对较长的时间来产生任何可观察到的电流，但能够维持电源活性操作（0.8 a.m-2），以及AD-MET集成的正贡献以应对丙酸积累和增强甲烷产量（338 mL.GCOCOD-1）。但是，还必须强调，从纯粹的充满活力的角度来看，AD-MET不利。
The aim of this study is to evaluate the integration of microbial electrochemical technologies (MET) with anaerobic digestion (AD) to overcome AD limitations caused by propionate accumulation. The study focuses on understanding to what extent the inoculum impacts on the behaviour of the integrated systems (AD-MET) from the perspective of propionate degradation, methane production and microbial population dynamics. Three different inocula were used: two from environmental sources (anaerobic sludge and river sediment) and another one from a pre-enriched electroactive consortium adapted to propionate degradation. Contrary to expectations, the reactor inoculated with the pre-enriched consortium was not able to maintain its initial good performance in the long run, and the bioelectrochemical activity collapsed after three months of operation. In contrast, the reactor inoculated with anaerobic sludge, although it required a relatively longer time to produce any observable current, was able to maintain the electrogenic activity operation (0.8 A.m-2) as well as the positive contribution of AD-MET integration to tackle propionate accumulation and to enhance methane yield (338 mL.gCOD-1). However, it must also be highlighted that from a purely energetic point of view the AD-MET was not favorable.
