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Question:
Wastewater is to be discharged at a rate of 0.88m3/s into a river with K2-20 = 0.25day-1. During the low water period the flow rate in the river is 10 m3/s at a temperature of 24°C and the dissolved oxygen is 8.5mg/l. Determine the maximum allowable 5-day BOD of the waste at 20°C if the dissolved oxygen content below the outfall is to be not less than 4mg/l.
Assume that the waste temperature is 24°C and that the river water above the outfall is saturated with oxygen of 8.1mg/l.
From the laboratory tests the value of K1 was found to be equal to 0.12 day-1 at 24°C.
for sizing the syst em, the mean cell residence time is selected to be 5 days. the reactoer kinetic constants are u max= 2.4 d^-1 (1/day), Ks=75 mg/L as COD, Y=0.4 VSS/g COD and Kd=0.096 d^-1(1/day)
find teh minimum speed at which the train could pass over the tank and lift water up to teh full 4 m height. (hint: consider the locomotive to be stationary and neglecting all losses)
The input to a single-input neuron is 2.0, its weight is 2.3 and its bias is -3.
As a team, merge your findings into a team report and share your recommendations with your class.
Determine if a simple supported W 12x26 (A36 steel) beam has the capacity to support loads that produce 50 kips of live-load shear and 20 kips of dead-load shera.
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Prevention and Repair of Cracks In Building - Characterization of the total efficiency of any fiber could be directed how to work with permanent fiber as well as cost-effective design of the mixture
Steam at 100 bars and 550°C enters a turbine operating in steady-state with a volumetric flow rate of 460 m^3/min. 22% of the entering mass flow exits the turbine at 10 bars
A 2.1 m diameter sewer is laid on a slope of 0.0032 m/m. If the Manning's Coefficient for the sewer is equal to 0.015 at all depths and flows, determine flow (Q) and velocity (V) when the sewer is flowing full,
how many kilograms each of pearlite and preutectoid phase form? schematically sketch and label the resulting microstructure
Suppose 76% of all commuters ride to work in carpools. if eight workers are randomly selected, find the probability that at least 7 will ride in carpools.
Tall buildings can develop a significant difference in pressure between the inside and the outside of the building. Air lock entrances are used at the ground level so the pressure at the ground floor is not the same as atmospheric pressure. Assume th..
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