Title

Evaluation of the efficiency of integrated reactor of anaerobic digester and biofilm system with return sludge (IFAS) for landfill leachate treatment

Principal Investigator

Dr.Mahdi Farzadkia

Abstract

This study shows that COD and NH4+-N removal has a significant relation with temperature and hydraulic retention time in anaerobic digester, statistically. COD and NH4+-N removal in IFAS reactor has also a significant relation with hydraulic retention time, filling ratio and return sludge ratio. The maximum removal of COD in anaerobic digester(94.02%)was seen at 55°C and HRT=5d and in IFAS(87.93%) at the filling ratio of 50% and return sludge ratio of 70%, in this situation 99.28% of total COD was removed and its concentration was eliminated to 140 mg/l. The maximum removal of NH4+-N in anaerobic digester, IFAS reactor and total system was obtained 35.98%, 91.43% and 94.51% respectively, in conditions of ambient temperature, HRT=5d and filling ratio of 70% with return sludge ratio of 100%, , and final effluent concentration of NH4+-N reached to 9 mg/l.
Conclusion:

Regarding the results, temperature of ambient and HRT=5d in anaerobic digester and filling ratio of 70% with return sludge ratio of 30% in IFAS were determined as optimum conditions for simultaneous removal of COD and NH4+-N

Year

2014