文献类型：期刊文献

英文题名：Model predicted N2O production from membrane-aerated biofilm reactor is greatly affected by biofilm property settings

作者：Chen, Xueming[1];Huo, Pengfei[1];Liu, Jinzhong[1];Li, Fuyi[1];Yang, Linyan[2];Li, Xianhui[3];Wei, Wei[4];Liu, Yiwen[4];Ni, Bing-Jie[4]

机构：[1]Fuzhou Univ, Coll Environm & Resources, Fujian Prov Engn Res Ctr Rural Waste Recycling Te, Fuzhou 350116, Fujian, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Minist Educ, Inst Environm & Ecol Engn Guangdong Univ Technol, Key Lab City Cluster Environm Safety & Green Dev, Guangzhou 510006, Peoples R China;[4]Univ Technol Sydney, Ctr Technol Water & Wastewater, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia

年份：2021

卷号：281

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20212110404231);WOS:【SCI-EXPANDED(收录号:WOS:000665491400073)】；

基金：This work was supported by Fuzhou University (grant number: GXRC-20095). B.-J. Ni acknowledges the Australian Research Council (ARC) through Future Fellowship FT160100195. The authors are grateful to the research collaboration.

语种：英文

外文关键词：Autotrophic deammonification; Biofilm properties; Membrane-aerated biofilm reactor (MABR); One-dimensional modeling; Nitrous oxide (N2O)

摘要：Even though modeling has been frequently used to understand the autotrophic deammonification-based membrane-aerated biofilm reactor (MABR), the relationships between system-specific biofilm property settings and model predicted N2O production have yet to be clarified. To this end, this study investigated the impacts of 4 key biofilm property settings (i.e., biofilm thickness/compactness, boundary layer thickness, diffusivity of soluble components in the biofilm structure, and biofilm discretization) on one-dimensional modeling of the MABR, with the focus on its N2O production. The results showed that biofilm thickness/compactness (200-1000 mu m), diffusivity of soluble components in the biofilm structure (reduction factor of diffusivity: 0.2-0.9), and biofilm discretization (12-28 grid points) significantly influenced the simulated N2O production, while boundary layer thickness (0-300 mu m) only played a marginal role. In the studied ranges of biofilm property settings, distinct upper and lower bounds of N2O production factor (i.e., the percentage ratio of N2O formed to NH4+ removed, 5.5% versus 2.3%) could be predicted. In addition to the microbial community structure, the N2O production pathway contribution differentiation was also subject to changes in biofilm property settings. Therefore, biofilm properties need to be quantified experimentally or set properly to model N2O production from the MABR correctly. As a good practice for one-dimensional modeling of N2O production from biofilm-based reactors, especially the MABR performing autotrophic deammonification, the essential information about those influential biofilm property settings identified in this study should be disclosed and clearly documented, thus ensuring both the reproducibility of modeling results and the reliable applications of N2O models.