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- A city has a population of 50000 people and they consume an average 20 million m3 of natural gas per year. What fraction of this demand could be met by digesting the refuse from this community. Assume solid waste generation rate is 2kg/person/day, Organics are in the form of glucose whose organic proportion is 54.40 %.How much hydrochloric acid (kg/d) is required to neutralize a waste with 20 mg/L NAOH and a flowrate of 220 L/min?35 The average daily waste flow from a factory in an industrial estate is 75 m³ of stearic acid (CH2COOH) of concentration 150 mg/l and 9 m³ of capric acid (C,H,,COOH) of concentration 500 mg/l. Calculate the theoretical oxygen demand and 5 day BOD of the combined wastes. Calculate the minimum amount of nitrogen and phosphorus required in the waste stream for it to be amenable to biological oxidation treatment. Assume that BOD = 0.7 ThOD and Atomic weights: H = 1, C = 12, N = 14, O=16 and P32. BOD: N: P ratio of 100: 5: 1 is required in waste water for it to be amenable to biological oxydation treatment. 5
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