Simultaneous elimination of sulfide and nitrite from synthetic wastewaters was investigated using a bioreactor.The performance of two ASO reactors utilizing diverse electron acceptors was compared to evaluate the loading potential treating synthetic wastewaters. The data of ASO reactor were used in back propagation neural network system to predict its performance.The ASO reactor was operated to investigate the effects of various influent nitrites to sulfide molar ratios upon the sulfide and nitrite removal efficiencies from the synthetic wastewater. The effects of pH upon anoxic sulfide...