A certain municipality is planning to construct a new water treatment plant. The average water requirement...

A certain municipality is planning to construct a new water treatment plant. The average water requirement is equivalent to 123456 m3 /d). The peak flow rate is twice the average flow rate. A jar test experiment revealed the following results: Alum dose: 15 mg/L Temperature: 20 o C Coagulation: G = 850 s-1 , t = 40 s Flocculation: GT =123456 . Settling: t = 1.5 h.

a) Determine the size of the coagulation tank (L=2W, W=D) and flocculation tank (L=4W, D=W). Note that if the depth is more than 3 m, you need to use multiple tanks.

b) What power is needed for the coagulation and flocculation units? [2 marks]

c) What would be the volume of Alum storage to serve one month requirements? [Assume density of alum is 1.5 g/cm3 ]

d) Determine the diameter and depth of the circular settling tank. Note that if the dimeter is more than 40 m, multiple tanks should be used.

Solutions

Expert Solution

Ally Wells answered 11 months ago

Next > < Previous

Related Solutions

Suppose a municipality is proposing to upgrade its municipal water treatment plant to reduce pesticide contamination...

Suppose a municipality is proposing to upgrade its municipal water treatment plant to reduce pesticide contamination of its water supply to a level that does not adversely affect human health. The new plant would be constructed over the course of the initial year (year “0”) at a cost of $15 million. Once the plant begins operating in year “1”, estimated operating and maintenance costs of $3 million will be incurred per year for the life of the plant which is...

10. Suppose a municipality is proposing to upgrade its municipal water treatment plant to reduce pesticide...

10. Suppose a municipality is proposing to upgrade its municipal water treatment plant to reduce pesticide contamination of its water supply to a level that does not adversely affect human health. The new plant would be constructed over the course of the initial year (year “0”) at a cost of $15 million. Once the plant begins operating in year “1”, estimated operating and maintenance costs of $3 million will be incurred per year for the life of the plant which...

A pump is required for a sewage treatment plant in a municipality. Three options are under...

A pump is required for a sewage treatment plant in a municipality. Three options are under consideration. Applying an interest rate of 7.5%, the pump options data shown below, and the most computationally efficient appropriate engineering economic measure that can be used to compare the cost of the pump options, answer the questions that follow. Option Cost A B C Purchase Cost 56,000 26,000 20,000 First Year Operating Cost 8,000 10,500 11,500 Operating Cost Increase per Period 500 1000 1400...

The city of Bloomington is about to build a new water treatment plant. Once the plant...

The city of Bloomington is about to build a new water treatment plant. Once the plant is designed (D) we can select the site (S), the building contractor (C and the operating personnel (P). Once the site is selected we may erect the building (B). We can order the water treatment machine (W) and prepare the operations manual (M) only after the contractor is selected. We can begin training the operators (T) when both the operations manual and operating personnel...

The Iowa City Water Treatment Plant and the University of Iowa Water Treatment Plant remove calcium...

The Iowa City Water Treatment Plant and the University of Iowa Water Treatment Plant remove calcium hardness (Ca2+) by precipitating (making) CaCO3(s). If, after establishing equilibrium with CaCO3(s), the dissolved Ca2+ concentration is 10 mg/L and the pH is 10.5. a. What is the CO32- concentration in mol/L? b. What is the HCO3- concentration in mol/L? c. What is the alkalinity in mg/L as CaCO3?

The Water Treatment Plant and the University Water Treatment Plant remove calcium hardness (Ca2+) by precipitating...

The Water Treatment Plant and the University Water Treatment Plant remove calcium hardness (Ca2+) by precipitating (making) CaCO3(s). If, after establishing equilibrium with CaCO3(s), the dissolved Ca2+ concentration is 10 mg/L and the pH is 10.5. a. What is the CO32- concentration in mol/L? b. What is the HCO3- concentration in mol/L? c. What is the alkalinity in mg/L as CaCO3?

Q3. You have been selected to design a secondary wastewater treatment plant for a municipality in...

Q3. You have been selected to design a secondary wastewater treatment plant for a municipality in Amman of 15,000 people which has some industry that discharges wastewater to the municipal sewer system. The average daily wastewater flow is 2.1 MGD (million gallon/d) and the raw sewage entering the WWTP has an average BOD5 of 240 mg/L and average suspended solids of 260 mg/L. If the average domestic per capita sewage flow is 115 gpcd, what is the average flow of...

The municipality of a major city in Quebec is planning to build a new bridge to...

The municipality of a major city in Quebec is planning to build a new bridge to decrease the traffic load on the existing bridges connecting both sides of the city across the river. Construction is to start in 2020 and is expected to take four years at a cost of $25 million per year. After construction is completed, the cost of operation and maintenance is expected to be $2.5 million for the first year and to increase by 2.8% per...

A new water treatment plant proposed for Anytown, has an initial cost of P56 million. The...

A new water treatment plant proposed for Anytown, has an initial cost of P56 million. The new plant will service the 7,500 residential customers for the next 30 years. It is expected to save each customer P125 per year. The plant will require a major overhaul every 5 years, costing P1million. Determine the benefit/cost ratio at the city’s interest rate of 6%. Use PW and EUAC.

Q4. You are working in a waste water treatment plant, once your treatment plant receives sewage...

Q4. You are working in a waste water treatment plant, once your treatment plant receives sewage water with more colloidal or dissolved organic materials. As an Engineer what type of treatment will you prefer for this sewage water? Justify and explain the method selected by you.

Subjects