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An activated sludge system operates at a flow rate (Q) of 400 m3/day with an incoming BOD of 300 mg/L. The kinetic constants for this system are Y = 0.5 kg SS/kg BOD, Ks = 200 mg/L, ?m = 2 day-1. The hydraulic retention time of the aeration basin is 0.13 days. A solids concentration of 4000 mg/L in the aeration tank is considered appropriate. A treatment system must be designed that will produce an effluent BOD of 30 mg/L (90% removal).
(a) Determine the volume of the aeration basin.
(b) Determine the food to microorganism (F/M) ratio.
In the first couple steps you are using the sine function to derive that the interior triange BCG is a right triangle. However, the sine function, by definition, is opposite divided by hypotenuse. You used sine as opposite dividede by adjacent which ..
Identify the forces that work against the success of cladding systems in keeping the elements out.
During a hot air balloon race one specific balloon, initially at rest, accelerate vertically upward at a constant rate of a=4.5 ft/s^2 when t0=42 s from the ground the surface, which is at an altitude above mean sea level of s0=3750 ft. When the ball..
A vapor-compression refrigeration system, using Refrigerant 134a as the working fluid, has evaporator and condenser pressure of 1.4 bar and 12 bar, respectively.
A large stream flowing through a highly industrialized area must serve as the source of a community's water supply. The turbidity of the water ranges from 30 to 60 NTU, alkalinity exceeds 100 mg/L.
ship A leaves port sailing in a direction 60 degree C north of due east and sails for 12 hours at 10 knot . Sheep B leaves the same port 3 hours later and sails due east at 25 knot for 9 hours.
civil engineering - structure designplease write reflective report for structural design of reinforced cast in - place
Three loads are applied to a beam. the beam is supported by a roller at A and by a pin at B. neglecting the weight of the beam, determine the reaction at A and B when P=15kips.
A simple curve has a central angle of 42 degreess. A point Y is located 24m from the vertex and has a perpendicular distance of 3.00m from the back tangent.
Three particles are sliding along a flat, frictionless surface. mA = 0.4 kg, mB = 0.5 kg, and mC = 0.4 kg. Before any collisions take place, vA = 15i m/s, vB = 10im/s, and vC = 5 m/s
Suppose the annual traffic flow in one of these one-way streets is 100,000 vehicles and 5% of them would encounter the amber signal light. Estimate the number of accidents per year in the intersection that would be traced back to vehicles running thr..
Determine: a. the Level of Service for this segment; b. the loss in Level of Service, if due to construction the lane width is reduced to 10 feet and there are concrete barriers one foot away from either end of the pavement.
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