Nitrogen and phosphorus removal in an airlift intermittent circulation membrane bioreactor

High rate simultaneous nutrients removal in a single air lift bioreactor with continuous feed and intermittent discharge regime: Process optimization and effect of feed characteristics

“…Air-lift bioreactors with a continuous operation regime were not effective to remove phosphorus when compared to the CFIDAB with continuous feed and intermittent discharge regime used in this study. For instance, 12.1 and 6.6 mg/l of phosphorus was eliminated from synthetic wastewater in an airlift intermittent circulation membrane bioreactor and airlift loop reactor under a limited filamentous bulking state, respectively [14,15]. Hence, compared to other BNR systems, it can be concluded that the proposed single bioreactor is a good alternative to treat industrial wastewaters with high phosphorus concentration.…”

“…Haiyan et al proposed a CNP removal processes based on an airlift intermittent circulation membrane bioreactor. It was reported that 78.6 g/m 3 .day and 13.20 g/m 3 .day of TN and TP were removed [14]. In another study, Airlift loop reactor under a limited filamentous bulking state was operated to treat synthetic wastewater, which the average removal efficiencies for COD, NH 4 -N, TN and TP were 91, 92, 86 and 94%, respectively at HRT of 11 h [15].…”

A novel continuous feed and intermittent discharge airlift bioreactor (CFIDAB) for enhanced simultaneous removal of carbon and nutrients from soft drink industrial wastewater

“…At DO concentrations of 2 and 3.5 mg/l, the TN removal efficiency was increased with decreasing COD/N ratio which confirms the high capacity of this system for nitrogen removal. Table 9 compares the performance of this innovative system with other bioreactors applied for the simultaneous nutrients removal [13,14,23,25,[44][45][46][47][48]. It is clearly found from Table 9, single bioreactors with CFID regime shows more capability to remove CNP from wastewater relative to the other proposed single bioreactors.…”

“…for treating cheese whey wastewater [8], bubble column with a draught tube to treat synthetic wastewater [9], a biofilm airlift suspension extension reactor to treat synthetic wastewater [10], radial anaerobic-aerobic immobilized biomass (RAAIB) bioreactor to treat sewage wastewater [11], simultaneous anaerobic-aerobic (SAA) bioreactor for treating diluted land filled leachate [12], an airlift loop reactor under a limited filamentous bulking state for treating synthetic wastewater [13], airlift intermittent circulation membrane bioreactor for treating synthetic wastewater [14].…”

“…Another single bioreactor capable to supply different zones in terms of DO concentration is air lift bioreactor. From the literature, air lift bioreactor was particularly utilized to remove nitrogen components [14,26]. A continuous-flow airlift internal circulation membrane bioreactor proposed to eliminate nitrogen from synthetic wastewater.…”