An oxidation ditch system as diagrammed in Figure 14.21 can be used for nitrification- denitrification of domestic wastewater. The influent has a BOD of l78 mg/l and total nitrogen of 27 mg/l. and the effluent has a BOD of 8 mg/l and 4 mg/1 inorganic nitrogen, 3 mg/l nitrate, and 1 mg/l ammonia. The aeration period averages 24 hr and, as the system is located in a warm climate, the temperature of the 'mixed liquor is rarely below 16 C and is usually 18 C or greater. Calculate the dissolved-oxygen uptake for nitrification per liter of wastewater. [Based on Eq. (14.16), 1.0 mg of ammonia N requires 4.6 mg of oxygen.] Calculate the quantity of BOD satisfied by denitrification per liter. (One mg of nitrate contains 3.4 mg of oxygen.)
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.