DOI: 10.1016/j.watres.2019.01.039
Scopus记录号: 2-s2.0-85061734840
论文题名: A secret of high-rate mass transfer in anammox granular sludge: “Lung-like breathing”
作者: Xu D. ; Kang D. ; Yu T. ; Ding A. ; Lin Q. ; Zhang M. ; Hu Q. ; Zheng P.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 154 起始页码: 189
结束页码: 198
语种: 英语
英文关键词: Anammox granular sludge
; Expansion/contraction amplitude
; Expansion/contraction frequency
; Mass transfer flux
; “Lung-like breathing”
英文摘要: The granulation of anaerobic ammonium oxidation (Anammox) biomass can play a key role in developing stable and high-rate working of anammox process. It is important to know the working mechanism of anammox granular sludge (AnGS) for the optimization of reactor performance. In this study, a “lung-like breathing” determinator was invented to investigate the working behavior of AnGS in the bioreactor. The results showed that the AnGS had a regular expansion and contraction phenomenon, which was called “lung-like breathing”. With the biological loading rate (BLR) at 0.114 kg-N/(kg-VSS·d), the expansion and contraction amplitude (ExCA) was 1.29 ± 0.05%, and the expansion and contraction frequency (ExCF) was 39.3 ± 1.6 times/h. The AnGS cultivated in a bioreactor with higher nitrogen removal rate (NRR) was found to have the higher ExCA and ExCF when determinated at the same BLR, and the “lung-like breathing” behavior of one type of AnGS was revealed to bear a significantly (p < 0.05) positive correlation with the specific anammox activity (SAA). The mass transfer flux from “lung-like breathing” was far greater than that from molecular diffusion, which was regarded as a vital mechanism for the AnGS to demonstrate its high activity. These findings provided theoretical basis and technical parameters for the optimization of anammox nitrogen removal process. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121945
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, China; Department of Environmental Science College of Resource and Environmental Science, Chongqing University, Chongqing, China; Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore
Recommended Citation:
Xu D.,Kang D.,Yu T.,et al. A secret of high-rate mass transfer in anammox granular sludge: “Lung-like breathing”[J]. Water Research,2019-01-01,154