文献类型：期刊文献

英文题名：Modeling the Efficient Recovery of N2O as an Energy Source via Heterotrophic Bioreduction of Fe(Ⅱ)EDTA-NO

作者：Deng, Ronghua[1]; Huo, Pengfei[1]; Chen, Xueming[1]; Chen, Zhijie[2]; Yang, Linyan[3]; Liu, Yiwen[4]; Wei, Wei[2]; Ni, Bing-Jie[2]

机构：[1] Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment and Safety Engineering, Fuzhou University, Fujian, 350116, China; [2] Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia; [3] School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [4] Tianjin University, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220393255)

语种：英文

外文关键词：Chelation - Denitrification - Energy resources - Flue gases - Iron compounds - Nitrogen oxides - Organic carbon - Recovery

摘要：Efficient recovery of nitrous oxide (N2O) through heterotrophic denitrification with the help of Fe(II)EDTA-NO as a chelating agent has been regarded as an ideal technology to treat nitric oxide (NO)-rich flue gas. In this study, an integrated NO-based biological denitrification model was developed to describe the sequential reduction of the NO fixed in Fe(II)EDTA-NO with organic carbon as the electron donor. The model was firstly calibrated/validated and evaluated using the experimental data obtained at various substrates concentrations and then used to explore the possibility of enhancing N2O recovery by altering the substrates condition and reactor setup. The results demonstrated that the optimal COD/N ratio decreased consistently from 1.5 g-COD/g-N at the initial NO concentration of 40 g-N/m3 to 1.0 g-COD/g-N at the initial NO concentration of 420 g-N/m3. Furthermore, sufficiently increasing the headspace volume of the reactor was considered an ideal strategy to obtain ideal N2O production of 86.6% under the studied conditions. The production of high-purity N2O (98%) confirmed the practical application potential of this integrated treatment technology to recover a valuable energy resource from NO-rich flue gas. ? 2022, The Authors. All rights reserved.