12.61 A step-aeration activated-sludge sys an air supply of 1200 ft/lb of BOD level. The measured average oxygen the oxygen transfer efficiency. (Assu the amount at 20°C and 760 mm pre 2.62 An air supply of 1

Q: Environmental Engineering The air quality standard for ozone (O3) is 80 ppbv. Express that standard…

A: The air quality standard for ozone is 80 ppbv.The temperate (T) is 25ºC.Convert the unit of…

Q: 10-9. A dual-media filter contains anthracite with an effective size of 1.2 mm and uniformity…

A:

Q: A monomedia anthracite filter is designed with the following specifications: effective size 1.1 mm,…

A: Given: Effective size, d = 1.1 mm Density,  ρp=1650 kg/m3ρw=1000 kg/m3 μ=1.62×10-3 kg/ms Ergun…

Q: An auditorium is 100m in length, 70m in width, and 20m in height. It is ventilated by a system that…

A: given data,auditorium dimensionlength=100mwidth=70mheight=20mventilation system is required to…

Q: A vertical venturimeter carries a liquid of specific gravity 0.8 and has inlet and throat diameters…

A:

Q: A monomedia anthracite filter is designed with the following specifications: effective size 1.1 mm,…

A: Given data: Effective size, d = 1.1 mm Coefficient of uniformity, Cu=1.4 Density, ρp=1650…

Q: Turnover time for the humidity in the atmosphere is equal to? A- Evapotranspiration rate/volume of…

A: Given data : - Turnover time for the humidity in the atmosphere is equal to? A- Evapotranspiration…

Q: 4. Wastewater sample was prepared and incubated at 20°C for 5 days for BOD analysis. Sample volume…

A:

Q: Find the wind speed needed (in miles/hour) to obtain a daily evaporation of 0.163 in/day, if the air…

A: Given Data: Daily Evaporation is EL=0.163 in/day. Air temperature is T=80°F =26.67°C Relative…

Q: Consider a 98% efficient ESP which removes, fly ash from combustion gases flowing at 100 m3/sec. The…

A: Given Data,The resistivity of Ash = 1×1010 ohm-cmQ=100m3sη= 98% (Efficiency)1) Calculation of total…

Q: A factory is discharging its wastewater into a slowly moving stream that has a mean velocity of 3…

A: Dissolved oxygen sag curve

Q: Problem 4In water and wastewater treatment processes a filtration device may be used to remove water…

A: Given:Initial concentration of sludge (C1​): 20,000 mg/LInitial volume of sludge (V1​): 100 m³Final…

Q: Clean Filter Head-Loss Using the Rose equation 11-6, determine the head loss across a clean filter…

A:

Q: In activated sludge system, SRT is governed by

A: Activated sludge system:

Q: A complete mix activated sludge secondary treatment plant is wasting from the return sludge line.…

A: Solution: Given Data: Mean cell solids residence time Qc=5 daysV=1000 L=1 m3MLVSS Xt=2000 mg/LWaste…

Q: a) Determine the total GMF surface area required to filter a volumetric flow rate of 10.0 MGD at a…

A: Volumetric flow rate, Q = 10 MGD Filtration rate = 4.0 gallonsmin-ft2 For backwashing, Backwashing…

Q: Calculate the required power of the optimum in-line blender for an alum coagulant in the coagulation…

A:

Q: 1.) Surface aerators were installed at a wastewater treatment plant to provide oxygen to an…

A: Minimum DO = 1.3 mg/LAlpha (α) = 0.85Beta (β) = 0.9Water depth = 3 mWidth = 50 m Length = 80 mTo…

Q: Problem 1 -31 Calculate the density of water vapor at 350 kPa abs and 20°C if its gas constant is…

A:

Q: Calculate the heating value of below gas composition

A:

Hydrogen Energy

Energy is a quantity that cannot be defined, its existence can only be felt. In simple language, if a system possesses energy, it can do a specific kind of work. There are many forms of energy sources which people can use to obtain work. Solar energy, tidal energy, hydroelectric energy, geothermal energy, wind energy are some of the renewable energy sources which are primarily used for the production of electricity.