Assignment 4 Fall 2013 Soln

Parameter flow bod5 rbcod tkn temperature viable

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Unformatted text preview: eter Flow BOD5 rbCOD TKN Temperature Viable Biomass Conc. in Aeration Basin (Xm) Return Activated Sludge Ratio Aeration basin volume SRT (based on aeration basin volume) Biomass Nitrogen Content Effluent NH4-N Value 1000 m3/day 200 mg/L 60 mg/L 35 mg/L 15oC 1620 mg VSS/L 0.54 460 m3 10 days 0.12 g N/gVSS 1.0 mg/L Determine the internal recycle ratio and the anoxic tank volume required to achieve the d esired overall nitrogen removal TKNeff = 35(1-0.85) = 5.25 mg/L NO3eff = 5.25 - 1 = 4.25mg/L NH4-N eff = 1 mg/L rbCOD/bCOD x100 = 60/320 x100 = 18% = 20% Guess Vanoxic = 300 m3 From chart SDNR = 0.11 @ 20C SD...
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This document was uploaded on 02/10/2014.

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