Integrated Submerged Media Extended Aeration Activated Sludge (ISmEAAS) Reactor Start-Up and Biomass Acclimatization
The present study elucidates the start-up and biomass acclimatization of the existing bench-scale extended aeration activated sludge (EAAS) reactor. Furthermore, the feasibility of upgrading the existing reactor into an integrated submerged media system was also investigated. In this study, two identical bench-scale EAAS reactors were set up for biomass acclimatization in continuous flow mode for 45 days. Both reactors achieved a steady state for COD removal on the 29th and 31st days, with a removal efficiency of approximately 90%. The TSS removal attained stability on the 37th and 39th days, with a removal efficiency of approximately 50%. Both reactors achieved steady state for nutrient removal later to organic removal. The ammonia concentration achieved a steady state on the 39th day. Likewise, total phosphorus concentration became stable more or less at the same period. The removal efficiency of nutrients was found to be approximately 50%, which is not par with organic. Thus, upgrading the existing treatment facility is a scope to enhance treatment efficiency to achieve stringent wastewater discharge limits.
Keywords: integrated wastewater treatment system, EAAS reactor, acclimatization, medium strength wastewater, continuous flow mode.
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