Environmental Science 2009-10-15

[Treatment of bromoamine acid wastewater by combined ALR-BAC process].

Wei Zhang, Jing Wang, Hong Lü, Ji-ti Zhou, Ruo-fei Jin

Index: Huan Jing Ke Xue 30(10) , 2930-5, (2009)

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Abstract

Combined ALR-BAC was used to treat bromoamine acid wastewater. The results showed that the ALR system could run steadily for over 1 months at the BAA concentration 650 mg x L(-1) after one-month acclimation, the decoloration rate of BAA was reached to about 90% within 12 h, and the removal rate of COD was about 50%, the precipitation performance of the suspended microorganism was good. When the influent bromoamine acid concentration was above 200 mg x L(-1), the decolorization products of BAA were easy to undergo auto-oxidation and the yellow intermediate products which were difficult to biodegrade were formed. The BAC process could inhibit the auto-oxidation of the decolorization products effectively, and the decolorization products could be biodegraded gradually. When there were no added sulphate, the concentrations of Br- and SO4(2-) were increased as the COD concentration reduced. Ultimately, the release rates of Br- and SO4(2-) were 72.2% and 66.9%, the COD removal efficiency was about 85.7%.