Low-Concentration Organics Mitigate the Inhibition of Free Nitrous Acid on Nitrification in Biofilters for Gaseous Ammonia Removal

作     者：Niu, Lishan Baig, Zenab Tariq Yeung, Marvin Soomro, Abdul F. Lu, Lichao Xi, Jinying 

作者机构：South China University of Technology China Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing100084 China School of Petrochemical Engineering and Environment Zhejiang Ocean University Zhoushan316004 China 

出 版 物：《SSRN》 

年 卷 期：2023年

核心收录：

主　　题：Nitrification 

摘      要：Free nitrous acid (FNA) inhibition restricted the ammonia removal efficiency of bioreactors under a medium or high inlet ammonia loading, mainly by inhibiting nitrite-oxidizing bacteria (NOB) and ammonia-oxidizing bacteria (AOB). Three parallel ammonia removal biofilters with different inoculums were set in this study. When increasing the inlet ammonia loading rate to 21.8 ± 1.3 gN m-3 h-1, biofilters could merely remove 60.3 ± 10.0% of inlet ammonia since FNA inhibition became the main inhibitor of nitrifiers, due to the accumulation of intermediate products including NO2- and H+. To relieve FNA inhibition, low-concentration extraneous organic electron donors (C/N © 2023, The Authors. All rights reserved.