期刊
BIORESOURCE TECHNOLOGY
卷 117, 期 -, 页码 201-207出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.04.076
关键词
Moving bed biofilm reactor; Microelectrode; Packing rate; Polyurethane foam; Pyrosequencing
资金
- National High Technology Research and Development Program (863 Plan) [2009AA062903]
- National Science and Technology Support Program from the Ministry of Science and Technology of China [2012BAJ21B00]
The effects of packing rates (20%, 30%, and 40%) of polyurethane foam (PUF) to the removal of organics and nitrogen were investigated by continuously feeding artificial sewage in three aerobic moving bed biofilm reactors. The results indicated that the packing rate of the PUF carriers had little influence on the COD removal efficiency (81% on average). However, ammonium removal was affected by the packing rates, which was presumably due to the different relative abundances of nitrifying bacteria. A high ammonium removal efficiency of 96.3% at a hydraulic retention time of 5 h was achieved in 40% packing rate reactor, compared with 37.4% in 20% packing rate. Microprofiles of dissolved oxygen and nitrate revealed that dense biofilm limits the DO transfer distance and nitrate diffusion. Pyrosequencing analysis of the biofilm showed that Proteobacteria, Bacteroidetes and Verrucomicrobia were the three most abundant phyla, but the proportions of the microbial community varied with the packing rate of the PUF carriers. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据