School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, China.
School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, China.
Bioresour Technol. 2020 Feb;298:122403. doi: 10.1016/j.biortech.2019.122403. Epub 2019 Nov 11.
Anaerobic digestion (AD) is an effective strategy combined advantages of maintaining the global carbon flux and efficient energy conversion. Various conductive materials (CMs) have been applied in anaerobic digesters to improve the performance of anaerobic fermentation and methanogenesis, including carbon-based CMs and metal-based CMs. Generally, CMs facilitated the AD thermodynamically and kinetically because they triggered more efficient syntrophic metabolism to increase electron capture capability and accelerate reaction rate as well as enhance the performance of AD stages (hydrolysis-acidification, methanogenesis). Besides, adding CMs into anaerobic digester is benefit to dealing with the deteriorating AD, which induced from temperature variation, acidified working condition, higher H partial pressure, etc. However, few CMs exhibited inhibition on AD, including ferrihydrite, magnesium oxide, silver nanoparticles and carbon black. Inhibition comes from a series of complex factors, such as substrate competition, direct inhibition from Fe(III), Fe(III) reduction of methanogens, toxic effects to microorganisms and mass transfer limitation.
厌氧消化（AD）是一种有效的策略，结合了维持全球碳通量和高效能量转换的优势。各种导电材料（CMs）已被应用于厌氧消化器中，以提高厌氧发酵和产甲烷的性能，包括基于碳的 CMs 和基于金属的 CMs。一般来说，CMs 从热力学和动力学上促进了 AD，因为它们引发了更有效的共代谢，以增加电子捕获能力，加速反应速率，并增强 AD 阶段（水解酸化、产甲烷）的性能。此外，将 CMs 添加到厌氧消化器中有利于处理由温度变化、酸化工作条件、更高的 H 分压等引起的 AD 恶化。然而，很少有 CMs 对 AD 表现出抑制作用，包括水铁矿、氧化镁、纳米银和炭黑。抑制作用来自一系列复杂因素，如基质竞争、Fe(III) 的直接抑制、Fe(III) 对产甲烷菌的还原、对微生物的毒性作用和传质限制。
