Engineering, 19.11.2019 01:31, kitkat033157
An activated sludge tank treats 1 mgd from the primary clarifier and has an x or 2,200 ppm ss. the water effluent is 0.9 mgd. 1.0 mgd of the sludge is recycled back into the tank and has a [ss] of 3,980 ppm. the concentration of bod exiting the primary clarifier is 200 ppm.
(a) find qw and xw.
(b) find qc and xc.
(c) find q1 and x1.
(d) find xe.
(e) calculate the volume of the tank that will satisfy the following requirements: a. bod loading < 35 lb bod/1000 ft3 day b. sludge age > 5 days c. aeration period > 4hr
Answers: 2
Engineering, 04.07.2019 18:10, keigleyhannah30
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
Engineering, 04.07.2019 18:10, genyjoannerubiera
Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)
Answers: 1
Engineering, 04.07.2019 18:10, QueenLife4869
Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.
Answers: 3
An activated sludge tank treats 1 mgd from the primary clarifier and has an x or 2,200 ppm ss. the w...
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