Engineering, 09.04.2021 01:10 abelsoto

Consider the single stage trickling filter plant from the solution in Example 9.1. The use of a single stage filter produced a plant efficiency of about 75%. To increase plant efficiency, the engineer decides to add an identical second stage filter in series to the first one. The wastewater flow rate is 2000 m3/d with a BOD5 concentration of 400 mg/L. Primary clarification removes 30% of the BOD5. The filters are each 12 m in diameter and 1.5 m in depth. The direct recirculation ratio for each stage is 2.0. Wastewater temperature is 20°C. Calculate the second stage hydraulic loading rate, organic loading rates, effluent BOD5 concentration, and overall plant efficiency. Comment on the advantages/disadvantages of using single stage versus two stage trickling filters.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:20

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.

Answers: 1

Answer

Engineering, 04.07.2019 19:10

Asteel wire of 2 mm diameter is fixed between two points located 2 m apart. the tensile force in the wire is 250n, if its density of steel is given by 7830 kg/m3 the fundamental frequency of vibration hz? ?

Answers: 3

Answer

You know the right answer?

Consider the single stage trickling filter plant from the solution in Example 9.1. The use of a sing...

Questions