4. An activated sludge plug flow reactor (PFR) is designed to treat domestic wastewater for organic matter removal only. The following design parameters are given: mgMLVSS mgBOD, Y = 0.60 K = 100 mgBOD;/L, k,= 0.10 d', H = 0.7 d', s. 250 mgBOD5/L, S = 10 mgBOD/L,X=2000 mg MLVSS/L, , Q.= 75000 m/d, SVI= 90 ml/g, A. What is the sludge age 0 of this PFR? B. What is the volume of the PFR? C. What is the sludge wasting rate (Qy) in m/d needed to have an effluent suspended solids concentration (X.) of 30 mg/l in the treated wastewater coming out of the final sedimentation tank?

Explain about the electromechanical device a geophone.

1.How many days will it take you to consume a 10-m^3 of water if your daily consumption is 30 liters?2.How many tiles would be needed to cover a 30ftx28ft floor area if a tile measures 30cmx30cm?How many tiles will you buy?3. How many pieces of plywood would be used to cover the ceiling in #2 if the measurement of the ceiling is the same as the floor area and if a plywood measures 1.22 m x 2.44 m? How many pieces of plywood will you buy?4.An Aquarium measures L=5ft, 3ft and H= 20 inches.How many liters will it contain if it will be filled with water until 2 inches below its brim?5.An atom has a diameter of 3.5x10^-10m.What is the measurement in a.)cm and b.) nm6.What is the equivalent speed of light which is 299792458.0 m/s to:a)km/hb)nm/usc)cm/nsd)um/s7.A book measure L=10 inches, W= 8 inches, and H=2 inches.How many of these can be packed in a box that measures L=50cm,W=50cm, and H=60cm if it is to be filled up to the maximum number (this means that no book or any part of it can be…