Environmental Engineering Homework Help

1- Develop an EN-ROADS scenario simulation gets to at least +1.5°C and describe the impact your scenario could have on travel & tourism as a sector. Screenshot and submit your EN-ROADS scenario. 2- Briefly explain the decisions you made for Energy Supply, Transport, Land, and Industry Submissions. Predict the impact your scenario might have on travel & tourism as a sector. Use up to 1,000-words for all questions and add the word count. Cite any references used; citations are not counted in the word limit. 3- Write Executive Summary Use this link to do the EN-ROADS scenario simulation:

(20 points) A metal plating facilitate produces hazardous waste that contains 50 mg/L of copper (Cu). Caustic soda (i.e. sodium hydroxide; Na OH) is added to the waste to raise the pH and cause precipitation of copper hydroxide (Cu(OH)2) according to the followingreaction: Copper hydroxide has a Ksp of 2.00×1019. The goal of the treatment process is to reduce the copper concentration to 1.3 mg/L. Determine the hydroxide concentration (in moles/L) to which the solution needs to be raised to achieve the target copper concentration. What is the pH of this solution?

2.18 A chemical reaction (A => B) occurs in a batch reactor. The initial concentration of compound A is100 mg/L. The concentration that remains after 10 min is 90 mg/L. The concentration that remains after20 min is 80 mg/L. Determine the reaction order and the rate constant of this reaction.

Some wastewater has a BOD5 of 150 mg/L at 20° C. The reaction rate k at that temperature has been determined to be 0.20/day. Find BOD5 (in mg/L) at 15° C.

(20 pts) Be creative and use the knowledge you have learned in Topic 5 (partition coefficients among air, liquid, solid phases) to answer (and discuss why) the followingCOVID-19 related questions, in less than 400 words: (a) What was the main pathway of transmission, according to CDC, when the pandemic first started? (before May 2020) (b) What is the main pathway of transmission, according toCDC, from most recent news? (between Mar-May 2021) (c) Compare (a) and (b), and known facts, are there changes? If there are, does it surprise you? Why? (d) Is cleaning the environment or surfaces still significant? Discuss based on the partition/eguilibrium theories. (A+ > 20 pts, A > 17 pts, B → 14 pts, C → 10 pts, D → 8 pts)

The fundamental burning velocity (or flame speed) in air is an indication of combustion rate and potential explosion energy for vapors.

46) The threshold level for acutely harmful effects of toxic pollutants is most closely related to the A) first appearance of chronic effects. 5) time of day of exposure. ) concentration of exposure. D) concentration and duration of exposure.

1. (15 points) Suppose Monongalia County, which has a population of 105,612 is planning anew landfill that will accept the county's waste for the next 20 years. Assume the county's residents generate an average of 2.0 kg of solid waste per person per day, which is the U.S. average. The county plans to use a ratio of cover and compacted waste to compacted waste of 1.5. If the density of the compacted waste will be 550 kg/m³, what landfill volume is needed to accommodate the county's waste generation for 20 years?

Problem 7. Suppose the only source of BOD in a river is untreated wastes that are being discharged from a food processing plant. The resulting oxygen sag curve has a minimum value of DO downstream equal to 3.0 mg/L. Just below the discharge point, the DO of the stream is equal to the saturation value of 10.0 mg/L. ka = 0.2 day"; k= 0.8 day"; stream velocity is 60 miles/day. A. By what percentage should the BOD of the wastes be reduced to assure a healthy stream with a least 5.0 mg/L of DO everywhere? B. How far downstream from the discharge point would the lowest DO occur? C. What ultimate BOD (mg/L) of the mixture of river and wastes just downstream from the discharge point would cause the minimum D0 to be 5.0 mg/L. D. Sketch the oxygen sag curve before and after treatment recommended in (A), labeling the critical points (this can be a hand-drawn sketch if you wish, or on excel)

Question 3 Not yet answered Marked out of 0.10 Flag question Design a cylinder rapid mixer for a water treatment plant with a peak flow rate of 45,000 m³/d. The velocity gradient G in the mixer is to be at least 2,000 s¹ and the detention time is at least 12 s. Determine the size of the mixing tank, the power input, and the rotational speed of the mixer. Assume: H (mix basin height) =D (tank diameter) D, (impeller diameter): D=0.65 Np=7.1 D=H=1.53 m; Power = 315 W; D-0.574 m; n = 3.84 rps OD=H=1,43 m; Power = 2315 W; D=0.574 m; n = 1.84 rps OD=H=2 m; Power = 25000 W; D=1.30 m; n = 0.985 rps D=H=1.43 m; Power = 2325 W; D=0.274 m; n = 0.84 rps O D=H=0.43 m; Power = 2315 W; D=1.574 m; n = 1.24 rps Next page ?