The most economic method of sewage wastewater treatment is bacterial digestion. As an intermediate step in the conversion of organic nitrogen to nitrates, it is reported that the Nitrosomonas bacteria cells metabolize ammonium compounds into cell tissue and expel nitrite as a by-product by the following overall reaction:
5CO2 + 55NH4+ + 76O2 → C5H7O2N(tissue) + 54NO2- + 52H2O + 109H+
If 20,000 kg of wastewater containing 5% ammonium ions by weight flows through a septic tank inoculated with the bacteria, how many kilograms of cell tissue are produced, provided that 95% of the NH4+ is consumed?
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