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1. A waste contains 100 mg/L of acetic acid (CH3COOH) and 50 me. of NH3-N. Determine the theoretical carbonaceous oxygen demand, the theoretical nitrogenous oxygen demand, and the total theoretical oxygen demand of the waste.
2. A waste contains 50 mg/L of phenol (C6H6O) and 100 mg/L of NH3-N. Determine the theoretical carbonaceous and the theoretical nitrogenous oxygen demand of the waste.
Discuss methods of transportation and pumping the ready mix concrete - Ready mix transportation and pumping
Toluene has contaminated a city's drinking-water supply. An activated carbon system has been constructed so toluene concentrations are treated to below specified regulatory levels. If the toluene concentration in the water supply is 1,000 ppb
Compute the effective composite modulus of subgrade reaction (please consider the subbase, the presence of a relatively shallow rock foundation, and the potential loss of support)
A steel shaft with a diameter of 40mm and length of 1.1m transmits 60hp from an electric motor to a compressor. If the allowable shear stress is 50MPa and the allowable angle of twist is 1.5 degrees
What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface? A factor of safety of 2 is to be maintained against be..
During a particular 30-day period, the streamflow flowing into a reservoir averaged 5.0 m3/s. Water supply withdrawals from the reservoir averaged 136 mgd. The only other outflow from the reservoir was 9.4 cm of evaporation from the water surface.
A water treatment plant has 6 settling tanks that operate in parallel (the flow gets split into six equal flow streams), and each tank has a volume of 600 m^3.
Describe the basic principle of differential GNSS positioning and the difference between real time differential GNSS and post processed differential GNSS.
How did the De Beers cartel try to maintain control of the price in the diamond market?
The man has a mass of 65kg and stands motionless at the end of the diving board. If the board has the cross section, determine the maximum normal strain developed in the board. The modulus of elasticity for the material is E = 117GPa
A two-liter bottle is one-third full of water and two-thirds full of air. The air in the bottle has a gage pressure of 340 kPa. the bottle is turned upside-down and the cap is released so that the water is rapidly forced out of the bottle
If the river depth is larger than the subcritical sequent depth, a submerged hydraulic jump forms. Sometimes, concrete blocks called "baffle blocks" are placed on the stilling basin floor to help the hydraulic jump form within the basin.
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