Infrastructure Engineering CEIE 355- Environmental Engineering and Science Assig
ID: 1711655 • Letter: I
Question
Infrastructure Engineering CEIE 355- Environmental Engineering and Science Assignment 2 Due Friday September 15, 2017 at 10:30 AM 20 points Note: Late homework will not be graded Problem 1 You are employed by the Maryland Department of Environmental Quality and your team must monitor the emissions of Dickerson Incinerator (https://www.montgomerycountymd.gov/sws/facilities/rrf/). The incinerator has emissions of 0.00004% sulfur dioxide by volume in winter at 0 degrees C and 1 atm. Determine if this rate of emissions is within the 1-hour standard (you will need to research the standard online and make sure you are using the latest standard site your source) in units of ug/m (convert state standard and emissions both to ug/m). If not, what should the emissions be to meet the standard (as a percent)? How would your calculations need to be changed if the emissions were analyzed in summer when temperatures were 25 degrees celsius? (3 pts After a major water main burst in the winter of 2005, the NO-N concentration in the tap water at the Country Club at Fairfax was 11.5 ppm. Was the water safe to drink? Explain why or why not. (2 pt) A wastewater discharge pipe from an air conditioning manufacturing facility discharges 0.0032 g/L of polychlorinated biphenyls (PCBs https://www.epa.gov/pcbs/learn-about- polychlorinated-biphenyls-pcbs) into a stream at a flowrate of 1.2 mls. The stream runs through an industrial area with a number of industrial plants at a flow rate of 150,000 L/min and has a background PCB concentration of 0.000056 mg/L. PCBs are considered a conservative compound. What is the concentration of PCBs in the creek after the discharge point? State ALL assumptions AND draw a mass balance diagram of the system in order to receive full credit. (4 pts A 900 MW power plant with a 20% efficiency sends 25% of the waste heat goes up the smoke stack and the rest is removed with cooling water from a nearby river with a temperature of 15 degrees C. The upstream flowrate is 88 m'/s. The intake of river water must be maintained such that the temperature of the cooling water does not exceed 25 degrees C. a) What flowrate from the river is required to meet these conditions? (2 pts) b) What is the temperature of the river just after the cooling water is returned to the river? (2 pt) Problem 2 Problem 3 Problem 4Explanation / Answer
Problem 2 As the concentration of NO3-N is more than the standard limiting value so the water is not safe to drink.
The standard recommended limit of drinking water is 10.0 ppm hence we are not safe if we drink that water.
We will suffer from carboxy haemoglobamenea if we drink that water.
That's all.
Thanks.