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Dosing effect of nano zero valent iron (NZVI) on the dark hydrogen fermentation performance via lake algae and food waste co-digestion
Energy Reports ( IF 5.2 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.egyr.2020.11.200
Mingxing Zhao , Ziyi Liu , Jin Xu , He Liu , Xiaohu Dai , Sai Gu , Wenquan Ruan

Abstract The effect of nano zero valent iron (NZVI) on hydrogen production by the co-digestion of dry lake algae and food waste was investigated. The results showed that 10 mg.gTS−1 addition of NZVI improved the performance of the co-digestion system, with the cumulative hydrogen increased by 29.20% to 40.04 mL.gVS−1, compared to that of the control. However, the cumulative hydrogen yield decreased to 14.77 and 5.37 mL.gVS−1 when the NZVI dosage was increased to 20 and 40 mg.gTS−1, respectively. The oxidation reduction potential (ORP) of the reaction system was decreased dramatically to -331 ∼ -490 mV at the initial reaction stage. The degradation rates of carbohydrate and protein also reached their peaks at the NZVI dosage of 10 mg.gTS−1. The concentration of end product in the liquid phase and the dehydrogenase activity was first increased then decreased when enhancing the NZVI dosage. Analysis of the transmission electron microscopy images revealed that excessive NZVI dosage could destroy the cells of microorganisms.

中文翻译:

纳米零价铁(NZVI)对湖藻和餐厨垃圾共消化暗氢发酵性能的影响

摘要 研究了纳米零价铁(NZVI)对干湖藻和食物垃圾共同消化制氢的影响。结果表明,与对照相比,添加 10 mg.gTS-1 NZVI 提高了共消化系统的性能,累积氢气增加了 29.20% 至 40.04 mL.gVS-1。然而,当 NZVI 剂量分别增加到 20 和 40 mg.gTS-1 时,累积氢气产量下降到 14.77 和 5.37 mL.gVS-1。反应体系的氧化还原电位(ORP)在初始反应阶段急剧下降至-331~-490 mV。碳水化合物和蛋白质的降解率也在 NZVI 剂量为 10 mg.gTS-1 时达到峰值。随着NZVI用量的增加,液相终产物浓度和脱氢酶活性先升高后降低。透射电子显微镜图像分析表明,过量的 NZVI 剂量会破坏微生物细胞。
更新日期:2020-11-01
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