Find the rate of biological growth

Reference no: EM13560457

Two identical complete-mix activated sludge units are connected in series; one-half of the sludge recycle flow rate, QR, is recycled to the primary effluent pipeline which handles a flow rate Q, and the other half is recycled to the effluent line from the first tank. The total flow from the primary settling tank (QT = Q + QR/2) is split into two streams, each one of which entering each tank. The following is a plant schematic. Find the rate of biological growth, rg (mg VSS/L.d), in each reactor.

Use the following design parameters: Q = 3.785 x 106 L/d; QR = 7.57 x 105 L/d; XR= 8000 mg VSS/L; X= 3000 mg VSS/L; V = 3785 m3.

Reference no: EM13560457

Questions Cloud

Determine the operating point on the pump characteristic : Determine the operating point on the pump characteristic curve when the flow is such that the pressure drop across the control valve is 35 kN/m^2

Determine the flow rate in the pipeline and the head loss : Contract loss coefficient = Kc = 0.34 , d1 = 2 in , d2 = in d3 = 1 in , and Rm = 6ft , gauage fluid = 52lbf/ft^3 neglect friction but consider an expansion loss coefficient of k' = o.5

Calculate the steady state hcho concentration : These concentrations were measured when the trailers were 2 years old and the emission rate had significantly decreased by that time. New material rates as high as 290 mg/hr have been reported. Calculate the steady state HCHO concentration (ug/m3) re..

How efficient is the pump : A fireboat pump draws seawater (density=1.95 slugs/ft^3) from a 6 inch diamter submergred pipe that reaches 6 feet under the free surface and discharges 120 ft/s through a 2 inch diamter nozzle 10 feet above the free surface

Find the rate of biological growth : Two identical complete-mix activated sludge units are connected in series; one-half of the sludge recycle flow rate, QR, is recycled to the primary effluent pipeline which handles a flow rate Q, and the other half is recycled to the effluent line fro..

Which alloy and in what condition whould you choose : For a concrete column that is part of a braced frame, if the column is square, tied, 18 inches per side, 16 feet long, classify the column as slender or non slender

For a concrete column that is part of a braced frame : For a concrete column that is part of a braced frame, if the column is square, tied, 18 inches per side, 16 feet long, classify the column as slender or non slender. Assume that at one end of the column a clockwise moment of 100 k-ft is present

Which cross section option will provide the highest flow : Two channel cross sections are proposed. Assume slope, cross sectional area, and surface type are constant for each channel. Which cross section option will provide the highest flow rate? Show calculations.

What is the major head loss in a coarse concrete pipe with : What is the major head loss in a coarse concrete pipe with a diamter of 1ft that is 100 ft long. Water flows at a rate of 20 ft^3/s (viscosity of water = 2.344x10^-5 lbfs/ft^2, density of water = 1.94 slugs/ft^3) 1inch = 25.4mm

User Account

All Pages