Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.
Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.
Bioresour Technol. 2022 Mar;347:126420. doi: 10.1016/j.biortech.2021.126420. Epub 2021 Nov 25.
The application of sulfidated zero-valent iron as an alternative used in coupled anaerobic systems to improve methane production is usually restricted by its high production costs and toxic gasses and wastewater generation. In this study, a collaborative strategy for coupling zero-valent iron (ZVI) and ferrous sulfide (FeS) together into anaerobic systems was used to evaluate the enhancement of methanogenesis during the co-digestion of food waste and waste activated sludge, with the microbial evolution and metabolic pathway revealed. Results showed that the enhanced hydrolysis and acidogenesis process of co-digestion in this coupled anaerobic system could be attributed to synergistic interactions among ZVI, FeS, and microorganisms. Furthermore, both acetoclastic and hydrogenotrophic pathways could be promoted by coupling ZVI and FeS. This study demonstrated that coupling ZVI and FeS together into anaerobic systems would be a promising method for improving the methanogenic performance for municipal solid waste treatment.
将硫化零价铁作为一种替代物应用于耦合厌氧系统中以提高甲烷产量，通常受到其高生产成本以及有毒气体和废水产生的限制。在这项研究中，采用将零价铁（ZVI）和硫化亚铁（FeS）结合到厌氧系统中的协同策略，评估了在协同消化食品废物和废活性污泥过程中甲烷生成的增强情况，并揭示了微生物的演变和代谢途径。结果表明，在这种耦合厌氧系统中，协同作用可以增强共消化的水解和产酸过程，这种协同作用来自 ZVI、FeS 和微生物之间的相互作用。此外，耦合 ZVI 和 FeS 可以促进乙酰营养型和氢营养型途径。本研究表明，将 ZVI 和 FeS 结合到厌氧系统中可能是提高城市固体废物处理中甲烷生成性能的一种有前途的方法。
