Determine the minimum do concentration in the stream

Assignment Help Civil Engineering

Reference no: EM13305111

A municipal WWTP discharges 22.5 MGD of secondary effluent containing 45 mg/L of ultimate BOD at 26.7 C with 1.3 mg/L of dissovled oxygen. The stream flow is 237 ft^3/s at an average velocity of 2.1 ft/s and an average depth of 7ft. The temperature of the stream before the wastewater enters is 16 C. The stream is 80% saturation with oxygen and has an ultimate BOD of 2.3 mg/L. The reaction (kr) and deoxygenation (kd) rate coefficients are 0.35 d^-1 and 0.2 d^-1 respectively at 20 C. The arrhenius temperature correction coefficients are Theta=1.024 for kr and Theta=1.056 for kd.

Determine 1.) wastewater flow rate in ft^3/s,

2.) temperature of the combined wastewater and stream,

3.) DO concentration of the mixture,

4.) DO deficit of the mixture,

5.) Ultimate BOD concentration of mixture,

6.) distance downstream (Xc) to the point of minimum DO concentration,

7.) the minimum DO concentration in the stream

Reference no: EM13305111

Questions Cloud

Find the minimum distance in which the car will stop : A car is traveling at 47.0 km/h on a flat highway. what is the minimum distance in which the car will stop

What is the market value of the plants electricity annually : Biomass is increasingly used as a fuel to produce power and heat. A sugarcane-? processing mill is powered by a biomass power plant with 140 MW of electricity and with 60 MW of heat in the form of steam for sugar extraction from the cane.

Is the operating room being used to capacity : Is the operating room being used to capacity? Is it possible to do more operations/year? If so, how many more? Discuss the effect of acquiring more operating room facilities if needed.

How much heat in kj is exchanged during each of processes : One kilogram of air (which behaves as an ideal gas) in a piston-cylinder assembly is subjected to two separate processes from the same initial to the same final state: at the initial state the air has a volume of 1,000 L, a pressure of 10^5 N/m2,

Determine the minimum do concentration in the stream : A municipal WWTP discharges 22.5 MGD of secondary effluent containing 45 mg/L of ultimate BOD at 26.7 C with 1.3 mg/L of dissovled oxygen. The stream flow is 237 ft^3/s at an average velocity of 2.1 ft/s and an average depth of 7ft.

Calculate valuation for the estate total holdings of stock : Additionally, the total return on the stock is evenly divided between capital gains yield and a dividend yield. If the company's policy is to always maintain a constant growth rate in its dividend, what is the current dividend per share?

Calculate carbonate-noncarbonate and total hardness : Calculate carbonate, noncarbonate, and total hardness Na+ = 27.8 mg/L Cl- = 35.6 mg/L Ca+2 = 48mg/L CO3-2 = 30 mg/L Mg+2 = 12mg/L HCO3- = 61 mg/L K+ = 12 mg/L SO4-2 = 48 mg/L

Calculate the hardness of lime water as mg per l as caco3 : 38 mL of 0.02 N HCl is added to neutralize 50.0 mL of lime water (Ca(OH)2). Calculate the hardness of lime water as mg/L as CaCO3 and mg/L as Ca(OH)2.

Cybersecurity research paper : Identifying and explaining how the breach occurred and identifying and discussing known or suspected losses of confidentiality, integrity, and availability for information and/or information systems

User Account

All Pages