Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Chapter 4: Activated Sludge Modelling - IqTMA-UVa
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Processes for BOD Removal andNitrificationComputational Step for a correct Design of an AS process:1. Wastewater Characterization (bCOD, nbVSS, etc.)2. Effluent requirements [N-NH 4+], TSS, bCOD3. Nitrification safety factor (normally peak/average TKN loading ratio)4. Select a design DO in the aeration basin (typically 2 mg/L)5. Determine the specific growth rate for nitrifyiers, that due to their lowgrowth control AS design, based on DO and effluent [N-NH 4+]n nmN Kn NKoDO kDO6. Obtain the SRT corrected by the safety factor7. Obtain the effluent bCOD from Heterotrophic GrowthdnSRT1nS = Ks(1 + (k d)SRT)/(SRT(µ m– k d) – 1)34
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