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Nutrient Removal For Activated Sludge

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Q1.1) Determine the COD, N and P fractionations for the raw and settled wastewaters Known data COD Nitrogen Sti = 540 mg/L Soluble = 210 mg/L Si = 41 mg/L 103 mg/L Tss(raw waste) = ISS(Raw waste) = 25 mg/L Tss(settle waste) = 35 mg/L ISS(Settle waste) = 32 mg/L VSS(Settle waste) = 7 mg/L 297 mg/L Sbi Sf+SVFA+Xs=Sti-(Tss+Iss+Vss)-FCOD SVFA = 139 mg/L Calculation Non-biodegradable = Sti - Sbi = 243 mg/L Particulate = = Sti - Soluble 330 mg/L Ss = = Soluble - Si 169 mg/L SF = = Ss - SVFA 30 Xs = = Sbi - Ss 128 = = Sti - Ss - Si - Xs 202 mg/L Xi Nti Nai Soluble fvc FN = = = 1.48 0.1 = = Calculation Particulate = = Nousi = Noubi = = Noupi = = Nobpi = = mg/L TKN = N STi = 540 mg/L SS 169 mg/L Inorganic SI 41 mg/L SVFA 139 mg/L SF 30 mg/L Soluble = 210 mg/L filtered 0.45 µm 128XS mg/L Biodegradable Sbi =297 mg/L XI 202mg/L Non-biodegradable 243 mg/L Particulate = 330 mg/L Nai 29.1 mg/L Sbi =297 mg/L 243 mg/L Q1.2) Based on the data provided and considering all the previous characteristics of the treated effluent flowing out of Total (non-filtered) COD eff concentration mg/L COD eff concentration= SI+fcv*MXV/MXt*TSSeff where; SI= 41 FCV= 1.48 mxv/mxt=1, assuming xt=xv=3.5kg/m^3 vSSeff= 32 COD eff concentration= 88.36 mg/l (Non-filtered )TKN eff concentration TKN eff concentration=Nae+FN*VSS where; Nae= 4.9 mg/l TKN eff concentration 8.1 mgN/l Total(non-filtered) Neff concentration Neff concentration= Nae+Nne+fn*vss where; Nne= 7.2 mg ...
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Tags: Wastewater Treatment Plant Non biodegradable conventional activated sludge COD eff concentration Nitrification and denitrification

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