School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, People's Republic of China.
School of Environmental Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China.
Environ Technol. 2023 Nov;44(26):3988-3996. doi: 10.1080/09593330.2022.2077137. Epub 2022 May 29.
In this paper, the effects of nano-zero valent iron (nZVI) on anaerobic digestion of sulphate wastewater with different /COD ratios, including the COD removal rate, methane yield, intermediate products and the change of microbial community structure, were investigated. The results showed that nZVI could effectively enhance the treatment efficiency and methane yield. Compared with the control group without nZVI, the methane yield increased from 348.6833 to 1007.05 mL CH/gCOD with 4 g nZVI loading at /COD = 0.1. nZVI could make electron flow from sulphate reduction to methane production, which increased methane yield even at high sulphate concentration. The microbial community analysis showed that adding nZVI could increase the abundance of acetoclastic methanogens, which accelerated hydrolysis acidification.
本文研究了纳米零价铁（nZVI）对不同 COD/硫酸盐比的硫酸盐废水厌氧消化的影响，包括 COD 去除率、甲烷产量、中间产物和微生物群落结构的变化。结果表明，nZVI 可以有效提高处理效率和甲烷产量。与不添加 nZVI 的对照组相比，在 COD/硫酸盐比为 0.1 时，添加 4 g nZVI 可使甲烷产量从 348.6833 增加到 1007.05 mL CH/gCOD。nZVI 可以使电子从硫酸盐还原转移到甲烷生成，即使在高硫酸盐浓度下也能增加甲烷产量。微生物群落分析表明，添加 nZVI 可以增加产乙酸甲烷菌的丰度，从而加速水解酸化。
