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Technical Description <br /> Equation 4 predicts that 2.5 moles of oxygen are required to convert one mole of ammonium into <br /> 2 moles of nitrate ions for new biomass and water. This is equivalent to 4.2 mg/L of 0.per mg/L of <br /> ._ N i N converted to new cells and nitrate. Therefore, <br /> 02 x Q = O (502+2NH4 —a 2NO3+4H2O) (5) <br /> where <br /> 02 = 4.2 mg/L <br /> Q = NH <br /> it <br /> 0 = N05 +H2O (N-3+ CO2 +NO3 +P043 + SD4+jr) <br /> (These ions in solution(D C.H.O N bacteria protoplasm) <br /> The overall equation predicts that 1.98 moles of H are produced per mole of ammonium converted, <br /> or 7.14 mg of alkalinity as CaCO3 is destroyed per mg ofNH4 N converted.The equation also predicts <br /> that 0.17 mg of cells are produced per mg of NH4 N converted. <br /> ,,. The first two parameters(oxygen requirement and alkalinity destruction) are important in the design <br /> detention of any hybrid, heterotrophic/autotrophic treatment system. <br /> Oxygen is essential for the growth of nitrifiers, and alkalinity consumption is important because <br /> �. nitrifying organisms are efficient only over a relatively narrow pH range.The third parameter,biomass <br /> production, is important to the understanding of microbial population dynamics. <br /> The low cell production frequently causes washout ofnitrifiers in combined carbon-nitrogen oxidation <br /> systems without high sludge age. The Bio-Pure batch process assures that washout is less likely to <br /> occur than in a conventional flowthrough system or process due to the design of the hydraulic control. <br /> Compared to heterotrophic oxidation of carbonaceous waste material, nitrification generates <br /> relatively little biomass.Therefore,additional solids capacity for nitrogenous processing beyond those <br /> +— allocations given for the heterotrophic process is not required. <br /> The Bio-Pure batch system removes an average 96.8% of nitrates. <br /> (NOTE:By increasing detention time from 14 to 16 hours,the process begins to run out the right side <br /> ofthe growth curve. This additional detention time utilizes 0,demand for further conversion ofNH4 <br /> to NO <br /> Samples of MLSS are pulled from the ML entering the clarifier. <br /> Formula: <br /> Influent BOD, lb/day (6) <br /> F:M= Solids in aeration lb/day <br /> "' 13 <br />