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A waste water plant may have to remove phosphorus (phosphate) from its wastewater prior to discharge to the River. The DNR may set an effluent standard as low as 0.1 mg P/L. You are to make some preliminary calculations about phosphorus removal by chemical precipitation. Use the following data to make your calculations.Design average wet-weather flow (AWW) = 10 MGDTotal phosphorus concentration = 6 mg P/LAlkalinity = 120 mg/L as CaCO3pH = 6.9Alum: $1/gallon; density = 11.1 lb/gallon; 42% active alum by weightFeCl3: $1.10/gallon; density = 11.3 lb/gallon; 35% active FeCl3 by weight(a) Calculate the annual costs ($/yr) of meeting the proposed effluent requirement of 0.1 mg P/L using alum to precipitate AlPO4(s). Assume the chemical formula for alum is Al2(SO4)3·18H2O (MW = 666).(b) Assuming an interest rate of 6% and a design life of 20 years, calculate the net present worth of the annual costs determined in part (a).(c) Calculate the annual costs ($/yr) of meeting the proposed effluent requirement of 0.1 mg P/L using FeCl3 to precipitate FePO4(s).
An embankment for a highway 30m wide & 1.5m in a compacted thickness is to be constructed from a sandy trucked from a borrow pit. the water contenet of the sandy soil in the borrow pit is 15%& its void ratio is 0.69.
design a bar screen for a peak average flow of 0.46m3/s.you can consider reasonable assumptions.
how can Utah and other parts of the country have the same temperature but a different humidity?
What is the risk of constructing a harbor which will be unprotected from wave attack during its construction.
A circular sewer is laid on a slope of 0.5%. What diameter is required if the concrete is to carry 25 cfs. If the desired design mean section velocity is between 3 and 7 feet per second, is the design acceptable
A slurry containing 20 percent by weight of limestone (CaCO 3 ) is processes to separate pure dry limestone from water. If feed rate is 2000kg/h, how much CaCO 3 is produced per hour?
What is the length of the partial wavelength for electromagnetic energy with a frequency of 15 MHz and a phase shift of 263 degrees (in meters)?
Create a MATLAB program and flowchart which will allow the user to input an unknown number of temperatures, each of which might be a temperature in Celsius, Fahrenheit, Kelvin, or Rankine, and will convert the user input temperature to each of the..
Three-ply asphalt felt and gravel roof over 2in of insulation board is supported by 18in deep precast reinforced concrete beams with 3ft wide flanges. If insulation weights 3lb/ft 2 and the asphalt roofing weights 5.5lb/ft2, determine the total dea..
The soil properties of the clay are Cc = 0.25, Cr = 0.05, gsat = 18 kN/m 3 , for the sand gsat = 18 kN/m 3 , and the water table is 2 m below the soil surface. Determine the settlements when a stress of 100 kPa is applied by the building over an a..
calculate the ratio of area to volume for unit cube a unit sphere in inscribed inside the cube, and as write cylinder inscribed inside the cube.
A car collided with a telephone pole and left 20 ft skid marks on the dry pavement. Based on the damages sustained, an engineer estimated that the speed at collision was 15 mph. If the roadway had a +3% grade, calculate the speed of the car at the..
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