For a boarding school having an expected enrollment of 50 students, a. estimate
ID: 3145748 • Letter: F
Question
For a boarding school having an expected enrollment of 50 students,
a. estimate the wastewater flow assuming the typical flow per student (Table 1), and
b. determine the minimum size of septic tank (gal) that would be required assuming a 48 hour retention time.
Chrome File Edit View History Bookmarks People Window Help O 1) 60% D Mon 1158 AM a = • O BS Homework - 17 FALL AGSM 3 xY AGSM 337 Max C & Secure I https://tamu.blackboard.com/ bbcswebdavpid-3765599-dt-contentrid-26592282-1/courses/AGSM.337.500.173 1/Hw6_17C.pdf O AGSM 337 Marlin Pictures 22 7B7E7 1A4-12 3AB-BEDD6. Assembly hall 2-4 Hospitalmedical Bed 125-240 Employee 5-15 Hospitalmental Bed 75-140 Employee 5-15 Prison Inmate 80-150 20 Employee 5-15 Rest home Resident 50-120 Employee 5-15 School, day-only: with cafeteria, gym, showers Student 15-30 With cafeteria only Student 10-20 Without cafeteria, gym, showers Student 5-17 School, boarding Student 50-100 75 Adapted in part from Tehobanoglous, G. and E.L. Burton (1991) Wastewater Engineering, TreatmentDisposalReuse. Ed, McGraw-Hill, New York Table 2. eal wastewater Flow Rates from Commercial Sources Flow (gal/unit/day) Type of Establishment Uni Range ical Airport Passenger Automobile service station Vehicle served 8-15 12 Employee 9-15 13 Customer Employee 10-16 Department store Toilet room 400-600 500 Employee 8-15 Hotel Guest 40-60 Employee 8-13 10 Laundry (self-service) Machine 450-650 550 Wash 45-55 50 Public lavatory User 3-6 Restaurant 2-4 Conventional Customer 8-10 Short order Customer 3-8 Bar/cocktail lounge Customer 2-4 Theater Seat 2-4 OO D H O'1 o El DeP® 1 1 0 0 8 0 93 w P9 UExplanation / Answer
a. estimate the wastewater flow assuming the typical flow per student (Table 1), and
wastewater flow = 75 gal per student per day
total wastewater flow from 50 students per day = 50*75=3750 gal per day
b. determine the minimum size of septic tank (gal) that would be required assuming a 48 hour retention time.
total wastewater flow from 50 students in 2 days =3750 * 2 = 7500 gal
so the tank should be of size 7500 gal
b. determine the minimum size of septic tank (gal) that would be required assuming a 48 hour retention time.
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