3.2.3. Comparison between simple anaerobic treatment and AnMBR
A simple anaerobic treatment (EGSB) for BIWW had been carried out before the AnMBR experiment. Throughout the whole
280 d start-up and operation, the EGSB effluent was evaluated to
be stabilized with a COD concentration of 2000–2500 mg/L at
HRT 5 d (data not shown). As a comparison, the AnMBR system
was equipped with a higher COD reduction than EGSB, whose effluent only contained 1400–1600 mg/L COD. Moreover, nearly 60%