2. The average wastewater flow from a community of 20,000 is 125 gpcd. The 5 day, 20 deg CBOD is 250 mg/L. The suspended solids content is 300 mg/L. A final plant effluent of 50 mg/L ofBOD is to be achieved through the use of two sets of identical settling tanks and trickling filtersoperating in parallel. The settling tanks are to be designed to a standard of 1000 gpd/^2. Thelbm/1000*3Ibm/1000.^3.d.trickling filters are to be 6^ deep and operated at an organic loading of 55There is no recirculalon.(1) What settling tank surface area is required? In ft^2(A) 2500 ft^2(B) 3000 ft^2(C) 3500 ft^2(D) 4500 ft^2(2) What settling tank diameter is required? In ft(A) 40 ft(B) 50 ft(C) 65 ft(D) 80 ft(3) Estimate the BOD removal in the settling tanks? In percent %(A) 15%(B) 30%(C) 45%(D) 60%(4) What is the trickling filter diameter? In ft(A) 65 ft(B) 75 ft(C) 85 ft(D) 95 ft

2. The average wastewater flow from a community of 20,000 is 125 gpcd. The 5 day, 20 deg C BOD is 250 mg/L. The suspended solids content is 300 mg/L. A final plant effluent of 50 mg/L of BOD is to be achieved through the use of two sets of identical settling tanks and trickling filters operating in parallel. The settling tanks are to be designed to a standard of 1000 gpd/^2. The lbm/1000^3.d. Ibm/1000.^3.d. trickling filters are to be 6^ deep and operated at an organic loading of 55 There is no recirculalon. (1) What settling tank surface area is required? In ft^2 (A) 2500 ft^2 (B) 3000 ft^2 (C) 3500 ft^2 (D) 4500 ft^2 (2) What settling tank diameter is uired? ft (A) 40 ft (B) 50 ft (C) 65 ft (D) 80 ft (3) Estimate the BOD removal in the settling tanks? In percent % (A) 15% (B) 30% (C) 45% (D) 60% (4) What is the trickling filter diameter? In ft (A) 65 ft (B) 75 ft (C) 85 ft (D) 95 ft

2. The average wastewater flow from a community of 20,000 is 125 gpcd. The 5 day, 20 deg C BOD is 250 mg/L. The suspended solids content is 300 mg/L. A final plant effluent of 50 mg/L of BOD is to be achieved through the use of two sets of identical settling tanks and trickling filters operating in parallel. The settling tanks are to be designed to a standard of 1000 gpd/^2. The lbm/1000^3.d. Ibm/1000.^3.d. trickling filters are to be 6^ deep and operated at an organic loading of 55 There is no recirculalon. (1) What settling tank surface area is required? In ft^2 (A) 2500 ft^2 (B) 3000 ft^2 (C) 3500 ft^2 (D) 4500 ft^2 (2) What settling tank diameter is uired? ft (A) 40 ft (B) 50 ft (C) 65 ft (D) 80 ft (3) Estimate the BOD removal in the settling tanks? In percent % (A) 15% (B) 30% (C) 45% (D) 60% (4) What is the trickling filter diameter? In ft (A) 65 ft (B) 75 ft (C) 85 ft (D) 95 ft

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

2. The average wastewater flow from a community of 20,000 is 125 gpcd. The 5 day, 20 deg C
BOD is 250 mg/L. The suspended solids content is 300 mg/L. A final plant effluent of 50 mg/L of
BOD is to be achieved through the use of two sets of identical settling tanks and trickling filters
operating in parallel. The settling tanks are to be designed to a standard of 1000 gpd/^2. The
lbm/1000*3
Ibm/1000.^3.d.
trickling filters are to be 6^ deep and operated at an organic loading of 55
There is no recirculalon.
(1) What settling tank surface area is required? In ft^2
(A) 2500 ft^2
(B) 3000 ft^2
(C) 3500 ft^2
(D) 4500 ft^2
(2) What settling tank diameter is required? In ft
(A) 40 ft
(B) 50 ft
(C) 65 ft
(D) 80 ft
(3) Estimate the BOD removal in the settling tanks? In percent %
(A) 15%
(B) 30%
(C) 45%
(D) 60%
(4) What is the trickling filter diameter? In ft
(A) 65 ft
(B) 75 ft
(C) 85 ft
(D) 95 ft

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