Simultaneous removal of carbon, nitrogen, and phosphorus from landfill leachate using an aerobic granular reactor

In this study, aerobic granular reactor (AGR) was used to treat landfill leachate by changing the concentrations of chemical oxygen demand (COD) (668 ± 110-1149 93 mg/L), ammonia (NH 3 –N) (30 3.3-48 1.3 and phosphorus (PO 4 –P) (147 18-221 17 mg/L). The average COD removal gradually reduced from 81 75%, increasing 668 110 1149 mg/L. phase I, maximum (94%) NH –N (85%) were observed at influent mg/L 30 3.3 mg/L, respectively. Significant PO –P observed, resulting in a up 87%, further reducing 34% due an increase concentration. SVI 77 mL/g 24.15 towards end III indicates formation biomass. stability AGR also investigated extreme conditions like shut-down shock-loading phases. treatment real diluted with wastewater ( ∼ 20:80% v/v) showed significant COD, –N, 62%–65%, 61%–93%, 56%–64%, Mass balance analysis indicated that requires lower nitrogen percentage for microbial assimilation than phosphorus. Proteobacteria Planctomycetes identified as predominant (80%) bacterial community granules responsible removing using AGR. biodegradation rate r max ) half-saturation constant K s determined 123.5 h 309 • Aerobic Granular Reactor successfully treated leachate. Carbon, nitrogen, simultaneously removed A decrease sludge volume index (SVI granule formation. better performance higher shock loading are species