Abstract:The fermentation wastewater was treated by a lab-scale process combined with anaerobic expanded granular sludge bed (EGSB) and membrane bioreactors (MBR). The performance of the combined treatment process was studied in this paper, including methane gas production, the pollutants removal efficiency. The results showed that EGSB was effective in removing the organic pollutants of the fermentation wastewater under mesophilic condition (35±1℃) and the pH 6.0. COD removal rate reached 75.6% and the methane volumetric gas production rate was 0.48m3/(m3·d) when the influent COD was around 2250mg/L. The MBR system adopted continuously-fed and aeration-stir alternate operation to treat the fermentation wastewater after being disposed by the EGSB reactor. The simultaneous nitrification-denitrification (SND) was realized under dissolved oxygen (DO) 1~2mg/L. The best performance for TN removal was achieved under the aeration 3h-stirring 1h operating conditions, while the NH4+-N and TN removal efficiency were 85.13% and 58.57% respectively. Finally the COD remove efficiency of the combined treatment process was about 85%.