On the contrary, when the pH was 6.5, the NRR of all the reactors showed a decreasing trend, and this may be due to the negative impact of the lower pH on denitrification ( Figure 3B ), because when the pH was lower than 6, denitrification will be inhibited ( Yang et al., 2016 ).
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Denitrification Performance in Packed-Bed Reactors Using Novel Carbon-Sulfur-Based Composite Filters for Treatment of Synthetic Wastewater and Anaerobic Ammonia Oxidation Effluent.
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