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for denitrification. In sum, the degree of negative effect on denitrification by DO related to car-
bon source used. Therefore, Experiments with different Carbon Source Dosing Quality/DO
(CSDQ/DO) were carried out. As can be seen from Figure 7, the effect of DO on denitrification
decreased with the carbon source dosing quality increased. During the experiment, When CSDQ/
DO was 612 gL/mg, a reduction only about 6.4% was found. And nitrate removal efficiency of
the reactor was always higher than 70%. However, When CSDQ/DO decreased to 536 gL/mg,
a reduction about 10.7% was found. The result shows that the effect of DO on denitrification
can be minimized by carbon source. The result can be explained as following: with the increase
of carbon ...