PDF(Pubmed)
Abstract：
The slow startup and suboptimal efficiency of microbial carbon sequestration and methane-production systems have not been fully resolved despite their contribution to sustainable energy production and the reduction of greenhouse gas emissions. These systems often grapple with persistent hurdles, including interference from miscellaneous bacteria and the slow enrichment of methanogens. To address these issues, this paper examines the synergistic effect of coupling β-lactam antibiotics with an electrolytic cell on the methanogenic process. The results indicated that β-lactam antibiotics exhibited inhibitory effects on Campylobacteria and Alphaproteobacteria (two types of miscellaneous bacteria), reducing their relative abundance by 53.03% and 87.78%, respectively. Nevertheless, it also resulted in a decrease in hydrogenogens and hindered the CO2 reduction pathway. When coupled with an electrolytic cell, sufficient electrons were supplied for CO2 reduction to compensate for the hydrogen deficiency, effectively mitigating the side effects of antibiotics. Consequently, a substantial improvement in methane production was observed, reaching 0.57 mL·L-1·d-1, exemplifying a remarkable 6.3-fold increase over the control group. This discovery reinforces the efficiency of methanogen enrichment and enhances methane-production levels.
摘要：
尽管微生物碳封存和甲烷生产系统为可持续能源生产和减少温室气体排放做出了贡献，但它们的缓慢启动和次优效率尚未得到完全解决。这些系统经常克服持续的障碍，包括杂菌的干扰和产甲烷菌的缓慢富集。为了解决这些问题,本文研究了β-内酰胺抗生素与电解池偶联对产甲烷过程的协同作用。结果表明,β-内酰胺类抗生素对弯曲菌和α-变形杆菌(两种杂菌)均有抑制作用,它们的相对丰度减少了53.03%和87.78%，分别。然而，它还导致氢原的减少并阻碍了CO2还原途径。当与电解池耦合时，提供足够的电子用于CO2还原以补偿氢缺乏，有效减轻抗生素的副作用。因此,观察到甲烷产量有了实质性的改善，达到0.57mL·L-1·d-1，比对照组显着增加6.3倍。这一发现增强了产甲烷菌富集的效率并提高了甲烷生产水平。
