Abstract:

An anoxic dynamic membrane bioreactor（Anoxic-DMBR）was used to treat aquaculture/mariculture wastewater. The results showed that the COD_Mn removal rates by A-DMBR for treating aquaculture and mariculture wastewater were 89.5% and 75.5%. The TN concentrations of effluent were about 1.42 mg/L and 3.50 mg/L. And the sludge concentrations were 3850mg/L and 3550 mg/L respectively. Because of the inhibition effect of salt on denitrification enzyme，the denitrification efficiency decreased by 16%. The constants of NO₃^－-N reduction rate were 5.02×10^－4 h^－1 and 4.48×10^－4 h^{－1 in freshwater and seawater respectively. The reaction rate of the denitrification process in seawater was lower than that in freshwater.}