- ahmad alhayek

Problem

A treatment plant is planned to be installed in a recreational resort that contains a developed campground for 200 persons, lodges and cabins for 100 persons, and resort apartments for 150 persons. Assume that persons staying in lodges use the dining hall for 3 meals per day and that a 50-seat cafeteria with 4 employees and an estimated 200 customers per day has been constructed. Daily attendance at the visitor center is 500 persons. Other facilities include a 10-machine laundromat, a 20-seat cocktail lounge, and three gas stations (1100 L/d per station). Determine the average wastewater flowrate in L/d using the unit flows assuming the housing facilities are at maximum capacity.

Step-by-step solution

Step 1 of 6

Average Flow rate:

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Step 2 of 6

Refer to the Table 3-4, “Typical wastewater flow rates from recreational facilities in the United States” and to the Table 3-2, “Typical wastewater flow rates from commercial sources in the United States” in the textbook.

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Step 3 of 6

Visitor center:

Find the average flow rates for visitor center using the formula:

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Step 4 of 6

Substitute 500 for number of visitors and for typical flow rate.

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Step 5 of 6

Tabulate the remaining calculation values as in Table (1).

Comment

Step 6 of 6

Type of facility	Units	Developer	Typical flow rate,	Average flow rate,
Campground (With central toilet and bath facilities)	No. of persons	200	170	34,000
Lodges and cabins	No. of persons	100	150	15,000
Resort apartments	No. of persons	150	230	34,500
Dining hall	Meals served	3	25	75
Cafeteria	No. of customers	200	10	2,000
	No. of employees	4	40	160
Visitor center	No. of visitors	500	15	7,500
Laundromat	No. of machines	10	1,700	17,000
Cocktail lounge	No. of seats	20	80	1,600
Gas stations	Number of gas stations	3	1,100	3,300
Average flow rate	115,135