Upgrading the MBBR Process to Reduce Excess Sludge Production in Activated Sludge System Treating Sewage

Excess sludge production is one of the limitations biological activated process. Therefore, study’s objective to upgrade MBBR process an integrated fixed film-activated (IFAS) reduce excess production. Two scenarios were followed in this study eliminate process: first, modifying moving bed biofilm reactor (MBBR) system by increasing solid retention time (SRT) from 5 15 days; and second, upgrading fixed-film applying return (RAS) 50, 100 150% with operating hydraulic (HRT) 6, 12, 14 20 h. The results revealed that first scenario reduced 750 150 g/day, whereas second eliminated generation. In scenario, as IFAS complete SRT has due decay cell lysis. part 3 also showed achieved low effluent pollutants concentrations 3, 8 45 mg/L for BOD, COD, TSS NO3, respectively. Operating at may but result higher NO3 concentration NH3 To conclude, elimination possible carefully controlling RAS without additional treatment.