The characteristics of * Corresponding author.
E-mail address: xcwang@xauat.edu.cn (X.C. Wang).
Chemosphere
http://dx.doi.org/10.1016/j.chemosphere.2015.09.036
0045-6535/© 2015 Elsevier Ltd. All rights reserved.
Chemosphere 144 (2016) 689e696the external carbon sources exhibited significant effects on the
denitrification process such as denitrification rate, denitrification
potential, COD demand and biomass yield (Lee andWelander,1996;
Fernandez et al., 2010). Thus, the cost and denitrification charac-
teristics that have been considered when choosing a carbon source
have been highlighted.