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using the following assumptions determine the solids retentiontime the cell wastage flow rate and the return sludge
1a result of a 7-day bod test performed on a sample from anoligotrophic lake was 10 mgl the base e bod rate constant
1in a given year a 10000 mi2 watershed received 20 inof precipitation the average rate of flow in the river draining
a circular rapid-mix basin with stator blades is to be designed totreat 20 million gallons of water per day the
water at 20 degree c is pumped at a constant rate of 9m3h from a large resevoir resting on the floor to the open top of
1a town requiring 2 cms ofwater has two sources a local well with 15 gm3 of a contaminantand a distant surface water
1a spherical pressurevessel of 12m outside diameter is to be fabricated from a steelhaving an ultimate stress of
1when filled to capacity avertical cylindrical un-pressurized storage tank contains water toa height of 145m above its
a steel beam is supported on eachend by columns in a building nbsp the beam is designed tohold a 10kn heating unit at
q1 given a saturated solution of calcium carbonate atequilibrium how many moles of calcium ion will remain insolution
1a landfill have space of 162000 meters squared at avg depth of 10 m 765 meters cubed of solid waste is dumped at the
1state the two main reason why an activated sludge system is operated at a relatively low fm ration2define the fm ratio
1a dairy that processes about 250000 lb of milk daily produces an average of 65100 gpd of wastewater with a bod of 1400
using a safety factor of 200 and neglecting the pile dead weight find the length of a 1 diameter circular concrete pile
the tangent function is defined as than tsintcost this expression can be evaluated to solve for the tangent as long as
hj heinz corporation is constructing a distribution facilityin italy for products such as heinz ketchup jack daniels
a buried stock-water pipeline conveys water from a water source at point 1 rises to pass up and over the peak of a hill
1select the lightest w 14 shape that will support a live load of a 400 kips and a dead load of 75 kips for 20 feet tall
water at 20 degrees centrigrade in a 85 degree reducing bendis used in what is otherwise a continuous pipe the
1the speed limit for a highway is given as v in mph thehighway super elevation is given as e in ftft the
1a jar test has shown that the optimum dose of ferric chlorideconsumes all of the alkalinity if the amount of the
a 40 mm diameter solid brass shaft in a marine vessel is subjectedto a simultaneous torsion of t250 nm and axial thrust
a developer has requested permission to build a large retail store at a location adjacent to the intersection of an
a combined pitot static tube has a coefficient of 098 thedifferential head reading is 0874m of water when it is
abasket strainer is installed in a 15-cm diameter pipe pressuregauges are installed immediately upstream and downstream