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Question 1 The local sewage treatment work deploys the activated sludge process as secondary treatment and nitrification
Posted: Tue Apr 26, 2022 1:17 pm
by answerhappygod
- Question 1 The Local Sewage Treatment Work Deploys The Activated Sludge Process As Secondary Treatment And Nitrification 1 (62.16 KiB) Viewed 24 times
Question 1 The local sewage treatment work deploys the activated sludge process as secondary treatment and nitrification-denitrification as tertiary treatment of municipal sewage. Answer the following questions: (a) What is/are the contaminant(s) removed by the (i) activated sludge process and (ii) nitrification-denitrification? (1.5 marks) (b) Based on the oxygen requirement, what is the classification of the activated sludge, nitrifying bacteria and denitrifying bacteria? (1.5 marks) (b) Based on the energy requirement, what is the classification of activated sludge, nitrifying bacteria (equations 1-1 and 1-2) and denitrifying bacteria (equation 2)? Briefly explain your answer. Nitrification: NH4 +1.502 NO2 + 2H+ + H20 NO2 + 0.502 + NO3 (1-1) (1-2) Denitrification: NO3+ + organic matter → N2 + CO2 + H2O (2) (6 marks)