Engineering, 18.03.2021 01:20 Deascry
. A wastewater treatment plant discharges 1.0 m3/s of effluent having an ultimate BOD of 40.0 mg/L into a stream flowing at 10.0 m3/s. Just upstream of the discharge point, the stream has an ultimate BOD of 3.0 mg/L. The deoxygenation constant is estimated at 0.22/d. (a) Assuming complete and instantaneous mixing, find the ultimate BOD of the mixture of waste and stream just downstream of the outfall. (b) Assuming a constant cross-sectional area for the stream equal to 55.0 m2, what ultimate BOD would you expect to find at a point 10,000. m downstream of the outfall
Answers: 3
Engineering, 04.07.2019 18:10, koolgurl2003
Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.
Answers: 1
Engineering, 04.07.2019 18:10, lillygrl100
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
Engineering, 04.07.2019 18:10, dval1146
You are making beer. the first step is filling the glass carboy with the liquid wort. the internal diameter of the carboy is 15 in., and you wish to fill it up to a depth of 2 ft. if your wort is drawn from the kettle using a siphon process that flows at 3 gpm, how long will it take to fill?
Answers: 1
. A wastewater treatment plant discharges 1.0 m3/s of effluent having an ultimate BOD of 40.0 mg/L i...
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