Question

Discuss and compare the sludge retention time (SRT) as a design parameter for the following biological...

Discuss and compare the sludge retention time (SRT) as a design parameter for the following biological systems with:

a.      Carbon removal

b.      Nitrification

c.      Biological Phosphorous removal

Engineering   Civil-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Sludge Retention Time(SRT):-

The Sludge Retention Time (SRT) is the average time for which the activated-sludge solids remains in the system.

The SRT is an important design and operating parameter for the activated-sludge process and is usually expressed in days.

● The minimum SRT for carbon removal is less than 1 day but the high rate range of 2–3 days.

● SRT of 7 to 10 days at 10°C is required, for conventional nitrification.

● A SRT more than 12 days is necessary to complete the biological phosphorus removal.

Thank you.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
ANSWER as much as possible: Design an activated sludge process consisting of a complete mix flow...
ANSWER as much as possible: Design an activated sludge process consisting of a complete mix flow through aeration tank followed by final settling tanks. The sizing of the reactor and all appurtenances should be based on a solids retention time, (SRT), of 4 days and the particulates given below. Biological characteristics: Ks = 20 mg/L COD, kd = 0.1 per day, mumax = 3 gVSS/gVSS-day,    Y = 0.4 gVSS/gCOD Primary settling Tank Effluent Characteristics: Q= 20MGD, biodegradable COD, bCOD...
A completely mixed activated sludge process is designed to treat 20,000 m3 /d of domestic wastewater...
A completely mixed activated sludge process is designed to treat 20,000 m3 /d of domestic wastewater having a BOD5 concentration of 250 mg/L following primary treatment. The NPDES permit requirement for effluent BOD5 and TSS is 20 mg/L for each. The biokinetic parameters have been established as: yield = 0.6 , k = 5/d, Ks = 60 mg/L, and kd = 0.06/d. The MLVSS concentration in the aeration tank is to be maintained at 3000 mg/L and the ratio of...
A civil engineer is planning an experiment to compare the levels of biological oxygen demand (B.O.D.)...
A civil engineer is planning an experiment to compare the levels of biological oxygen demand (B.O.D.) at three different points in a river. These are just upstream of a sewage plant, five kilometers downstream, and ten kilometers downstream. Assume that in each case samples will be taken in the middle of the stream (in practice samples would likely be taken at several positions across the stream and averaged). One set of samples will be taken at 6 a.m., another will...
A company is researching the effectiveness of a new website design to decrease the time to...
A company is researching the effectiveness of a new website design to decrease the time to access a website. Five website users were randomly selected, and their times (in seconds) to access the website with the old and new designs were recorded. To compare the times, they computed (new website design time − old website design time). The results are shown below. User Old Website Design New Website Design A 30 25 B 45 30 C 25 20 D 32...
​Which of the following is NOT a type of multiple-baseline design? a. ​multiple-baseline across time b....
​Which of the following is NOT a type of multiple-baseline design? a. ​multiple-baseline across time b. ​multiple-baseline across behaviors c. multiple-baseline across participants d. ​multiple-baseline across situations
2. Consider the following impulse responses h[n] of linear time-invariant (LTI) systems. In each case, (i)...
2. Consider the following impulse responses h[n] of linear time-invariant (LTI) systems. In each case, (i) provide the transfer function H(z) (ZT of h[n]) and its ROCh, (ii) sketch the ROCh in the z-plane, (iii) mark the pole and zero locations of H(z) (on the same plot in the z-plane), and (iv) discuss whether or not the LTI system is stable. (a) h1[n] = (0.4)^n u[n] + (2 - 3j)^n u(n -2) (b) h2[n] = (0.2)^(n+2) u[n] + (2 -...
1) When Blackbird realized that it would have to adjust its product design and production methods,...
1) When Blackbird realized that it would have to adjust its product design and production methods, it realized that adjustments to these production systems would ______. a not selected option a be required to implement various strategies b not selected option b have long-term consequences for the company’s revenue projections c not selected option c make distribution and sales more difficult d not selected option d affect the company’s time to market 2) Blackbird was challenged by finding a carbon...
Question 1) Which of the following are considered valid criticisms of the legalistic model of crime...
Question 1) Which of the following are considered valid criticisms of the legalistic model of crime and criminology? a. Law in action departs substantially from the ideal behavior of the law. b. Focusing only on legally criminalized behavior makes it impossible to consider the impact of gender, race, age and ethnicity. c. Legalistic definitions ignore acts that cause great harm. d. The legalistic model suggests that these are absolute standards for judging right and wrong. e. All of the above....
Part I. Indicate whether true or false (T or F). ____ Storm water detention ponds typically...
Part I. Indicate whether true or false (T or F). ____ Storm water detention ponds typically are designed to regulate the outflow peak rate at or below a single target value, such as the pre-development (pre-land use change) peak runoff rate for a specified return period event. Detention storage alters the peak but not the volume of the outflow hydrograph. _____ Typical rating curves for weirs are concave upward. Typical rating curves for orifices are concave downward. ____ A sediment...
1. Which of the following in not directly involved in the production of proteins? a. Golgi...
1. Which of the following in not directly involved in the production of proteins? a. Golgi complex b. Plasma membrane c. Rough endoplasmic reticulum d. Nucleus 2. A new coach tells his team that the reason they get fatigued after three minutes of exercise is because they do not have enough oxygen in their red blood cells. He has no data to support his position. Therefore his advice is? a. Valid since he is an expert working with people b....
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT