The TSS concentration in the primary treated effluent is 150 mg/L, and TSS removal is 63 percent. The sludge has an average soli
ds concentration of 6 percent and specific gravity of 1.045. What is the capacity of the sludge pump in m3/min per basin if the pump is used on a 15-min pumping cycle per h
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Answer:
D) 1.04 Btu/s from the liquid to the surroundings.
Explanation:
Given that:
flow rate (m) = 2 lb/s
liquid specific enthalpy at the inlet ( Btu/lb)
liquid specific enthalpy at the exit ( Btu/lb)
initial elevation ()
final elevation ()
acceleration due to gravity (g) = 32.174 ft/s²
= 3 Btu/s
The energy balance equation is given as:
Since kinetic energy effects are negligible, the equation becomes:
Substituting values:
The heat transfer rate is 1.04 Btu/s from the liquid to the surroundings.