Performance of batch-operated combined hydrolytic-aerobic biofilm process in treating anthraquinone reactive dye wastewater
- 化学化工－已发表论文 
A biofilm hydrolytic-aerobic combination treatment process based on mixed culture was used to degrade anthraquinone dye Reactive Blue 19 (RB19). The results indicated that the majority of color was removed in the hydrolytic stage. On the other hand, the majority of chemical oxygen demand (COD) was removed in the subsequent aerobic process. RB19 was successfully and completely degraded in the hydrolytic-aerobic combination treatment process where the initial step was the reductive decolorization, and then a complete degradation was achieved. The effects of the initial dye concentration and glucose concentration on COD and color removal during the combination process were investigated. Meanwhile, the change tendency of volatile fatty acids (VFA), pH, and alkalinity were also evaluated during the combination process. The VFA concentration in the hydrolytic effluent reached 13.5 mmol/L and sharply decreased down to 1.4 mmol/L after the subsequent aerobic degradation. The experimental results show that the biofilm hydrolytic-aerobic combination process was a stable and an effective process for treating RB19 waste-water for more than 3 months with 93 batches. In the presence of glucose 2,000 mgL(-1), COD and color removal efficiencies of RB19 could be up to 99.4% and 94.5%, respectively, by the hydrolytic treatment for 10 h plus the aerobic treatment for 2 h at RB19 600 mgL(-1).