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Riechers Spence & Associates Job #: 21 02 049.0 <br /> Consulting Civil Engineers Date: 10/21/02 <br /> 1 .2 Calculated influent characteristics: <br /> a. bCOD = 1 .55 * BOD = 1 .55 (10,000 g/m3) = 15,500 g/m3 <br /> b. nbCOD = COD - bCOD = 16,000 g/m3- 15,500 g/m3 = 500 g/m3 <br /> c. Effluent sCODe (assumed to be non-biodegradable) <br /> sCODe = sCOD - 1 .6 sBOD <br /> = 1 1,100 g/m3 - 1 .6 x 6,900 g/m3 = 60 g/m3 <br /> d. nbVSS <br /> nbVSS = �1 ((bCOD/BOD)(BOD—sBOD) (VSS) <br /> COD—sCOD <br /> nbVSS = 1_ 1.55(10,000-6,900) 11 <br /> )J(11400) <br /> 16,000—11,100 <br /> =[1-0.98] (1,400) = 1 ,373 g/m3 <br /> e. TSS = TSS — VSS = 2,000 — 1,600 = 400 g/m3 <br /> 2. Specific growth rate µn for the nitrifying organisms. <br /> DO <br /> µn (K„ +N)(K, +DO)-Kdn <br />_ 2.1 µn,m @ T=1 O°C <br /> µn.m,io'c= µmO4n,mT-20 = (0.75 g/g-d)(1 .07)10-20 = 0.38 g/g-d <br /> 2.2 Kn @ 10°C <br /> Kn,10-C= KdOKdT-20 = (0.74 g/m3)(1 .053)10-20 = 0.44 g/m3 <br /> 2.3 Kdn @ 10°C <br /> Kdn,10-C = KdnO KdnT-20 = (0.08 g/g•d)(1 .04)10-20 = 0.054 g/g-d <br /> Ne= 10 g/m3, DO = 2.0 g/m3, KO = 0.50 g/m3 <br /> An r(0.38g/gd)(l Og/m')I(0.5+2.0)g/ <br /> 2.0g/m' )_0.054 = 0.237g/g-d <br /> I\ (0.44+10)g/m' m <br /> 15 <br />