INTEGRATED ANAEROBIC - AEROBIC MBBR: A NOVEL APPROACH TO HIGH STRENGTH WASTEWATER TREATMENT

摘要

Anaerobic systems offer an attractive solution for wastewater treatment however require substantial capital investment and are prone to process upsets. To overcome these challenges, a new integrated anaerobic - aerobic technology based on moving bed media was developed to provide a small, cost effective and simple solution for a wide variety of wastewaters. The Dynamic ANaerobic Aerobic (DANA) system combines anaerobic and aerobic treatment in one reactor. DANA was successfully tested in an industrial pilot plant treating wastewater from a potato starch processing plant. The plant reached a Volumetric Loading Rate (VLR) and Surface Loading rate (SALR) in the anaerobic stage of up to 17 kg COD/m~3/day and 38.4 g COD/m~2/day, respectively. The overall COD removal was of 95%. The system showed an ability to work in flow velocities of up to 0.76 m/h. Load fluctuations and factory shutdowns did not cause major upsets to the system. The pilot plant demonstrated the simplicity and ease of operation of the new DANA system.