A novel combined process (CSTR-UASBAF-NMBR) in the pilot treatment of organic wastewater and its mathematical modelling

A novel combined biological process (CSTR-UASBAF-NMBR) was used to treat the effluent waste water in a corn deep processing enterprise. Results demonstrated that the combined process successfully started after 50 d. In the 155 days' steady process, the removal rates of COD and BOD achieved 99.4% and 99.8%, respectively. The investigation to explore optimum conditions of the NMBR indicated that hydraulic retention time (HRT) was controlled in 12 h in NMBR; the effluent could achieve the standard of reclaimed water recycle. Based on the anaerobic digestion model No.1 (ADM1) and activated sludge model No.1 (ASM1), the mathematical simulation of CSTR-UASBAF-NMBR process was performed. The favorable simulation illustrated that the average deviations of the three processes were lower than 15%, suggesting that the model can predict well on the novel combined process.