Expanded Granular Sludge Bed (egsb) Reactor Research And Application

After monitoring the qualities of sausage wastewater, the best wastewater treating process was determined. The anaerobic process combined with aerobic biochemical process could degrade the high concentration sausage wastewater effectively, the Chemical Organic Demand (COD) is 95.0%. The Expanded Granular Sludge Blanket (EGSB) reactor could remove the most part of the organic contamination from the wastewater. The optimal range of superficial liquid velocity (Vup) was 1.60~2.62 m/h in the EGSB reactor, and the highest volume organic loading rate (VLR) of EGSB was 310.24 kgCOD/m3 ?d. During the operational process of EGSB reactor treating sausage wastewater, the characteristics of granular sludge changed greatly. The granular diameter was ranged in 0.9~2.0mm, the max granular diameter was over 3.5 mm. As the secondary treatment process, the general active sludge process could also get good removal rate of the effluent of EGSB reactor, and the optimal hydraulic retention time (HRT) was 48 h.