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The country town with service area of 150 ha is sewered, and the main outfall sewer is laid on a grade (slope) of 0.003 m/m to a treatment plant. Effluent from the treatment plant is at present discharged via an open channel to the river. At the end of the design period (20 years), wastewater from a proposed dairy industry (average wastewater flow of 0.5 ML/day, BOD5 = 1500 mg/L, and service area = 25 ha) and from a nearby food processing industry (average wastewater flow of 300 m3/day, BOD5 load of 68 kg/day, and service area = 25 ha.) are also expected to be discharged into the main outfall sewer. Assume that the average wastewater contribution from the community is about 300 L/(person. day) and each person contributes 70 g BOD5/day.
(a) Estimate the ultimate mean dry weather flow, peak dry weather flow, peak wet weather flow and the minimum dry weather flow.
(b) Calculate total organic load reaching the plant per day and the population equivalent based on BOD5 of the combined wastewater flow for ultimate development condition (ie. end of the design period).
(c) Determine the pipe size required at the ultimate development stage for the main outfall sewer.
The plant currently has one CMFR for removal of chromium. How many more identical reactors does the sony music company require to meet the regulatory requirements for chromium discharge of 0.01 mg/L into the Pitman Sewer?
Two small liquid-propellant rocket motors are mounted at the tips of a helicopter rotor to augment power under emergency conditions. The diameter of the helicopter rotor is 7m, and it rotates at 1 rev/s.
Specify a device describing briefly its principle of operation, that is typically installed downstream of a bursting disc as an indicator of disc rupture,
A flat plate weighing 220 N slides down a 15 degree incline with a velocity of 2.5 cm/sec. A thin film of oil with a viscosity of 1.29 N.sec/m^2 separates the plate from the ramp. if the plate is 50 cm by 75 cm, calculate the film thickness in cm.
A pneumatic-tired tractor with a 354 - hp engine has a maximum speed of 3.6 mph in 1st gear. Determine the max. rimpull of the tractor in each gear if the engine effieicency is 91%.
A body with a mass of 250 kg is supported by the flexible cable system. Determine by analysis which of the cable A, B, C, or D has the largest tension.
a rectangular prism box which is floating on water has a length L =1200mm, breadth = 800mm, height = 500mm and mass of 52kg. when the box is loaded with the suspended hexagonal mass, its immersion is 300mm, and when it the mass is placed inside th..
The 15- puzzle problem has a 4x4 grid with 15 pieces in it and one blank square. You should output the proper sequence (moving pieces up, down, left, or right into the blank square) to put the 15 pieces in order.
A wood cube with 9 inch sides is inserted into water. The specific gravity of wood is 0.60. What force will need to be applied to the block downward to hold the wood cube completely submerged in water
Assume that you borrow $10,000 for five years (annual payments) at a market rate of 5%. Assuming that inflation is 3.5%, what would the equivalent equal monthly payment be in constant dollars
Three days later, Abu sees his solicitors and executed the transfer of his said bungalow to Abdul Samad at the said value. Two month later, Abdul Samad expelled Abu from the religious group. Abu now wants to set aside the sale of his bungalow.
if a hand-held GPS unit locates a latitudinal position with an uncertainty of + - 0.02-seconds, what is the distance uncertainty at the surface of the ellipsoid.
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