期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 19, 页码 8835-8838出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.06.090
关键词
Biodegradable polymer; Biofilm; Denitrification; Solid carbon source
资金
- National Natural Science Foundation of China [59978020, 50508018]
- National ST Major Project [2008ZX07102-003]
A novel kind of cross-linked starch/polycaprolactone (SPCL11) was prepared and used as carbon source and biofilm attachment carrier for denitrifying bacteria. The results showed that the average denitrification rate was 0.027 mg NO(3)-N/(g.h) in batch tests. The continuous fixed-bed experiments indicated that more than 90% NO(3)-N was removed, the denitrification rate reached 26.86 mg NO(3)-N/(L.h), and NO(2)-N concentration was below 0.16 mg/L. The formation of NH(4)-N was observed, but usually below 1.0 mg/L. Rapid biodegradation of starch on the surfaces of SPCL11 granules could cause an initial excess release of dissolved organic compound (DOC), and shortening HRT from 2 h to 1 h can result in sharp decrease of DOC. (C) 2011 Elsevier Ltd. All rights reserved.
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