vated sludge.12.61 A step-aeration activated-sludge system at a loading of 40 lb ofBOD/1000 ft³/day requiresan air supply of 1200 ft/lb of BOD applied to maintain an adequate dissolved-oxygenlevel. The measured average oxygen utilization of the mixed liquor is 36 mg/1/hr. Calculatethe oxygen transfer efficiency. (Assume 0.0174 lb of oxygen per cubic foot of air, which isthe amount at 20°C and 760 mm pressure.)12.62 An air sunnly

Answered: Image /qna-images/answer/d23fffec-835c-42df-8cfc-d676f867c98d.jpg

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

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

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter7: Thermal Processes

Section: Chapter Questions

Problem 7.1P

See similar textbooks

Related questions

Q: H 5 m 2 m

Q: PI T PC A½- 100' LC BT- PT PC R R 0 Da R T E T MO PT LC 0 R FT Given: PI Station 107+67.90 A= 11°…

Q: Discuss the concept of strain hardening in materials?

A: Strain hardening is also called cold working or work hardening and it is a mechanical process that…

Q: Load (N) Deflection (mm) 0 0 4.903034 0.000346 11.416539 0.000802 18.337648 0.001251…

A: The data you provided is from a load-deflection test on a mortar specimen. It shows how much the…

Q: Explain the concept of yield surface in plasticity theory?

A: The yield surface in plasticity theory is the boundary separating elastic and plastic deformation…

Q: The horizontal support reactions for the following truss below are: 20 kN 30 kN D 3 m Ax=0 kN and Bx…

A: Determine the horizontal reaction of the truss.

Q: 9.24 The rainfall excesses derived from the weighted-average daily rainfall in a basin are indi-…

A: Given,

Q: 3. Find M, for a typical T-beam in the floor system shown. The beams span 20 ft and are spaced 6'-0"…

Q: Determine the vertical shear force resisted by the top flange of the beam at 200 lb/ft C D 2 in. 8…

Q: 5-7 – Use the velocity of glass calculated in 5-5 and void fraction as 0.6 (0.4 is occupied by…

A: hello dear I have solve the first part . Can you upload the question again.thank you…

Q: 2.20. Refer to the framework shown in Fig. 2-38. Now, instead of the two loads P, the temperature of…

A: Change in distance between A and B is L√2 * coefficient of thermal expansion*change in temperature…

Q: Determine the vertical shear force resisted by the top flange of the beam at the critical section

A: Vertical Shear Force resisted by the top flange of the beam at the critical section = 40.178…

Q: Explain the difference between transportation planning and traffic engineering?

A: Transportation planning and traffic engineering are two different yet closely related disciplines…

Q: A well in an infinite confined aquifer (transmissivity = 30 m²/h and aquifer storativity = 0.005)…

A: The draw down in the observation well using the Cooper-Jacob, to first determine the value of U,…

Q: The bracket is held to the wall using three A-36 steel bolts at B, C, and D. Each bolt has a…

A: (1) Diameter of bolt(2) Unstretched length(3) Force(4) Young's modulus for A-36 steel is

Q: I need a literature review about the Enhancing indoor air quality and safe entertainment in sports…

A: Indoor air quality (IAQ) serves as a cornerstone for the health and comfort of individuals within…

Q: Horizontal highway curve: Given Pl at 10 + 71.78, A = 36°10'30", and R = 1,150 ft, compute the…

A: Given Radius 1150 ftAngle 36°10`30``To find out Deflections

Q: 3- Rainfall data for 10 years is available. The employer wants to know about the exact amount of 10-…

Q: I cut into 3 segment. Area: 4*1= 4 in^2, 4*1= 4 in^2, 10*1= 10 in^2

A: Determine the moment of inertia of the "Z" section with respect to the x and y centroidal axes. Ix =…

Q: A rural arterial is to be constructed in an area of rolling terrain, determine the following design…

A: For determination of design values for a rural arterial to be constructed in an area of rolling…

Q: Fluid Mechanics Question

A: The magnitude of the force of resistance to motion caused by the shoveling is 924 lbExplanation:Step…

Q: absorption is 0.21%

A: Yes, it is correctAbsorption of aggregate using the formula Absorption =…

Q: A horizontal venturi meter has a diameter at inlet and throat of 24" and 18", respectively. A…

A: Hence, the final answer is 276 cfs. Explanation:

Q: Consider the T-beam shown in (Figure 1). Take wy 18 kN/m and toy-27 kN/m Figure 200 mm C 200 mm 20…

Q: Use the Slope-Deflection equations to determine values of unknown displacements (in terms of E/).…

Q: By using the yield line theory, find the value of uniformly load (w) of the Isotropic slab, take…

Q: The beam is subjected to the loading shown. If a = 180 mm, determine the absolute maximum bending…

A: Absolute Max Stress = 105.105 MPaExplanation:

Q: Explain What factors determine the requirements for highway safety management data collection survey…

A: The requirements for highway safety management data collection survey frequencies are determined by…

Q: Define the concept of accessibility in transportation planning?

A: A major aspect of transportation planning is accessibility. It means how easily people can reach…

Q: 7-6. Determine the distance a as a fraction of the beam's length L for locating the roller support…

Q: 2.28. The three bars shown in Fig. 2-45 support the vertical load of 5000 lb. The bars are all…

A: I have attached the image below Explanation:Step 1:Step 2:

Q: = Air has a gas constant of R = 287 [J/(kg C)]. At standard temperature 15°C and pressure, air has a…

A: (1) Gas constant(2) Standard temperature(3) Dynamic viscosity(4) Density(5) Flow rate/Discharge(6)

Q: A flexible two-way roadway (as shown below) has two lanes each way with a two-way annual average…

A: n = 20 yearsAADT = 5460

Q: What are the fundamental principles of transportation engineering?

A: Transportation engineering is a multidisciplinary field that encompasses principles and concepts…

Q: QUESTION 1: PHASE RELATIONS a. The bulk unit weight and water content of a soil at a borrow pit are…

A: As per Bartleby's guidelines we are supposed to answer only first question. Kindly repost other…

Q: Calculate the x and y components for each of the forces indicated in the figure y Dimensions in mm…

Q: Q1/A horizontal curve with degree of curvature of 4° and intersection angle of 55°25', the PC is…

A: A curve is given between two stations with the following observations.degree of curve, D=…

Q: Help answer all

A: 15. c16. d17. d18. None of the choices.19. d20. b21. aExplanation:15. Thermal expansion refers to…

Q: NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to…

Q: P 5.4 quite the equations for shear V and moment M between points B and C. Take the origin at point…

A: Cantilever beam is given. We need to calculate equations for shear V and moment M between points B…

Q: Determine the forces in all bars. Indicate tension or compression

Q: Determine the magnitude, direction/sense, and location of the resultant force on the beam shown…

Q: QUESTION 1 A batter swings a 0.9 m long bat. Assume the bat has a mass of 0.6 kg the bat rotates at…

A: 0.9m longmass=0.6kgrotates=3 rad/secFINDKinetic energy of the bat is

Q: A H 6 m 2. The reaction at B = (kN) w = 40 kN/m M=150 kN.m 2 m P₁ = 20 kN B D TITIT 3 m

A: From the given diagram:mB = 0:RA(8)+150+20(3)-40(8)(4)=0RA(8)+210-1280 =0RA(8)-1070=0RA(8)=1070RA…

Q: To solve the question use table and equation on the photo. (Answers: 2.035*10^6 m^3 , 2.169*10^6…

A: At first we have to calculate delta of the different crops. Then we will calculated the consumptive…

Q: 3 The high-purity-oxygen process illustrated in Figure 12.39 is being considered for treat- ment of…

A: The objective of the question is to calculate the aeration volume required for the…

Q: 2(a) c) The average length of each vehicle in a traffic stream is 7.0M, and the average distance…

A: Jam density = 111.11 vehicles/kmSpeed at Max flow = 43.24 km/hrExplanation:

Q: verlays so dangerous

A: Deceptive Nature: Overlays frequently pose as trustworthy apps or interfaces. For example, overlays…

Q: 6-1 Draw the shear and moment diagrams for the shaft. The bearings at A and B exert only vertical…

Q: The rainfall excess derived from the weighted-average daily rainfall in a basin are indicated below.…

A: For Rainfall excess of 28 mm: Total Daily Streamflow ≈ 562.7868 m³For Rainfall excess 5.2 mm:…

Concept explainers

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.

Question

vated sludge.
12.61 A step-aeration activated-sludge system at a loading of 40 lb of
BOD/1000 ft³/day requires
an air supply of 1200 ft/lb of BOD applied to maintain an adequate dissolved-oxygen
level. The measured average oxygen utilization of the mixed liquor is 36 mg/1/hr. Calculate
the oxygen transfer efficiency. (Assume 0.0174 lb of oxygen per cubic foot of air, which is
the amount at 20°C and 760 mm pressure.)
12.62 An air sunnly

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1: Introduction of the problem

VIEW

Step 2: Determine total oxygen

VIEW

Solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

12.60 The aeration tank for a completely mixed aeration process is being sized for a design waste- water flow of 7500 m³/d. The influent BOD is 130 mg/l with a soluble BOD of 90 mg/l. The design effluent BOD is 20 mg/l with a soluble BOD of 7.0 mg/l. Recommended design para- meters are a sludge age of 10 d and volatile MLSS of 1400 mg/l. Selection of these values takes stants from a bench-scale treatability study are Y into account the anticipated variations in wastewater flows and strengths. The kinetic con- 0.60 mg VSS/mg soluble BOD and k₁ = 0.06 per day. Calculate the volume of the aeration tank, aeration period, food ganism ratio, and excess biomass th
Calculate theoretical oxygen requirement (kg/day) of a complete - mix activated sludge process treating domestic wastewater having flowrate of 1.00 m³/sec. BOD5 and ammonia concentrations of settled wastewater are 250 mg/L and 50 mg/L, respectively. a) If the system includes complete carbon removal and nitrification. (classical activated sludge) b) If the system includes complete carbon removal, nitrification and denitrification (Pre- denitrification).
The concentration of the mixed liquor suspended solids, MLSS, in the basin of a step aeration system is 2300 mg/L, and the volume of settled sludge after 30 minutes in a 1 L graduated cylinder is 200 mL. Calculate the SVI in mL/g.
1. A natural water with a flow of 4.0 MGD is to be treated with a commercial-grade alum dosage of 80 mg/l. Determine the amount of alum required (expressed in lbs/day), the amount of natural alkalinity required to complete the reaction (expressed in mg/l as CaCO3 and kg/day), and the amount of Al(OH)3(s) sludge produced (expressed in lbs/day and gal/day) if the sludge contains 2.2% solids by weight and the S.G. of the dry solids is 2.0.
Problem 4In water and wastewater treatment processes a filtration device may be used to remove water from the sludgeformed by a precipitation reaction. The initial concentration of sludge from a softening reaction is 20,000 mg/Land the volume of sludge is 100 m3. After filtration the sludge solids concentration is 350,000 mg/L. Assume thatthe sludge does not change density during filtration, and there is no accumulation of sludge in the filtrationdevice. Using the mass balance method, determine the volume of sludge after filtration.
N 5)( rat ala SIL O 23-A) An activated sludge system is to be used for treatment of 10000 m/day of municipal wastewater. A rimary clarification, the value of BOD, is 150 mg/l, and it is desired to have not more than 5 mg/l. in. ffluent. Assume that Y- 0.5; K, 0.05/day; and ML.VSS-3000 mg/l; Return sludge concentration 10 ng/L. 0 10 days. Determine: Treatment efficiency and the volumetric organic loading. 3) Microorganism ratio 5) The quantity of sludge that must be wasted each day i 2) Reactor volume and detention time. 4) the recycle ratin
Q- ASP is used to treat a waste water flow of 2MLD having BOD5 of 250 mg/lit. The biomass concentration in the aeration tank is 2500 mg/lit and the concentration of biomass leaving the system is 80 mg/lit, the aeration tank has a volume of 200m³. Find the hydraulic retention time HRT.
A conventional aeration tank is to treat a flow of 0.8 mgpd of primary effluent with a BOD of 125 ppm. The MLSS concentration is to be maintained at 1800 ppm, and a food -to-microorganism (F/M) ration of 0.4 is specified. Compute the required volume of the aeration tank. If the SWD is to be 15 ft and the tank length to be three times its width, how long should the tank be.
Hello, I have an equalization tank with the following dimensions: Tank Dimensions: Height: 5.15 meters Length: 10.3 meters Width: 30.48 meters Total volume calculated: 1616.8116 m³ The design flow is 2.5 MGD. I want to treat the pH and alkalinity with soda ash. pH: 4.9 (desired: 7) Alkalinity [mg/L]: 44 mg/L (desired: 200 mg/L) How can I calculate how much soda ash I need to treat the pH and alkalinity in the equalization tank?
The 550-bed Atlanta Hospital has a small, activated sludge plant to treat wastewater from the hospital. The average daily hospital discharge is 1.50 m3 per day per bed, and the average soluble BOD5 after primary settling is 450 mg/L. The aeration tank effective liguid dimensions of 10 m x 10 m x 5 m. The plant operating parameters are as follows: MLVSS - 2,600 mg/L; MLSS - 1.20 (MLVSS); Settling sludge volume after 30 min. = 200 mL/L. The aeration time is nearly?
The 550-bed Atlanta Hospital has a small, activated sludge plant to treat wastewater from the hospital. The average daily hospital discharge is 1.50 m3 per day per bed, and the average soluble BOD5 after primary settling is 450 mg/L. The aeration tank effective liguid dimensions of 10 m x 10 m x 5 m. The plant operating parameters are as follows: MLVSS - 2,600 mg/L; MLSS - 1.20 (MLVSS); Settling sludge volume after 30 min. = 200 mL/L. The F/M ratio is nearly?
Q-ASP is used to treat a waste water flow of 2MLD having BOD5 of 250 mg/lit. The biomass concentration in the aeration tank is 2500 mg/lit and the concentration of biomass leaving the system is 80 mg/lit, the aeration tank has a volume of 200m³. Find the sludge age.