期刊
CHEMOSPHERE
卷 83, 期 1, 页码 63-68出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2010.12.077
关键词
Moving bed biofilm reactor; Nitrogen removal; Simultaneous nitrification and denitrification; Biofilm; Solid carbon source; Soluble microbial products
资金
- Hi-Tech Research and Development Program of China (863 Plan) [2009AA062903]
- National S and T Major Project [2008ZX07102]
This paper presents a comparison between two different materials used as carriers: inert polyurethane (PU) foam and biodegradable polymer polycaprolactone (PCL) particles for the removal of organics and nitrogen from wastewater with a low C/N ratio using moving bed biofilm reactors. The results, during a monitoring period of four months, showed that TOC and ammonium removal efficiency was higher in reactor 2 filled with PU carriers than in reactor 1 filled with PCL carriers (90% and 65% in the former, compared with 72% and 56% in the latter at an hydraulic retention time of 14 h). Reactor 1 showed good behavior in terms of total nitrogen removal as the biodegradable polymer was an effective substrate providing reducing power for denitrification. From three-dimensional excitation-emission matrix analysis, it was shown that the effluent from reactor 1 contained mainly protein-like and soluble microbial productlike substances. (C) 2010 Elsevier Ltd. All rights reserved.
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