Question

2) Bacterial digestion is an economical method of sewage treatment. The reaction 5CO2(e)+55NH a)+7602()CsH,02Ns)+54NO2 (aq) + 52H2O()+ 109H" (aq) Bacterial tissue is an intermediate step in the conversion of the nitrogen in organic compounds into nitrate ions. What mass of bacterial tissue is produced in a treatment plant for every 1.0x10 kg of wastewater containing 3.0% NH* ions by mass? Assume that 95% of the ammonium ions are consumed by the bacteria. (Bacterial tissue is CsH,O2N1) (10)

Answer 1

3°%% Nass 3000008 .95X 300 000 NAyto n Cosumtd b bacteria 285000 a 11 28 5000 moles t N H moles 13833-33 18 olmet S trichiomehric raho Cs H N and NHy which baseol the given balanerd chemical epuah'm 15833 33 X s70, N moles o 303. 03 meles 1 303.03X 113 Mars 34242.39 g 34.24 Kg 1