State the two main reasons why an activated sludge system
State the two main reasons why an activated sludge system is operated at a relatively low food/microorganism ratio.
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What is the standard heat of reaction for- sugar and ethanol are "burned" to water vapor and carbon dioxide?
In a purely inductive AC circuit, L=25.0 mH and the rms voltage is 150 V. Calculate the inductive reactance and the rms current in the circuit
A 127-turn circular coil of radius 2.09 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Find the magnitude of the average EMF
A large storage tank, open to the atmosphere at the top and filled with water, calculate The diameter of the hole
A thin layer of oil (n=1.25) is floating on water (n=1.33). What is the minimum non zero thickness of the oil in the region
Calculate the BOD loading and days of winter storage available between the 0.6 and 1.5 m depths, assuming a daily water loss of 0.30 cm by evaporation and seepage.
Calculate the surface area required for a stabilization pond to serve a domestic population of 1000. Assume 80 gpcd at 210 mg/l of BOD. Use a design loading of 20 lb of BOD/acre/day.
Determine the activated sludge aeration volume required to treat 2.64 mgd with a BOD of 120 mg/l based on the criteria of a maximum BOD loading of 40 lb/1000 ft cubed/day and a minimum aeration period of 5 hr.
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