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Wednesday, January 07, 2009

Discharge calculation for STP ETP

REF. WASTE WATER ENGINEERING BY METCALF & EDDY PP 28 TABLES 2-11



HOSPITAL EFFLUENT TREATMENT PLANT :

Discharge Calculation:
OPTION-I

.
The proposed hospital will have ------ beds.(Number of bed mentioned in municipality records or other govt document)
1. Bed in Hospital= Nos @ 500 liter per bed = Liter 
2. Employee in Hospital = nos @ 40 liter per employee= Liter
3.Hostels- Persons = nos @ 150 liters per person.= Liter
4.Kitchen Meals= nos@ 10 liter per meal = Liter
So, Total Quantity of discharge: --------- liter per day




Discharge Calculation:
OPTION-II

Total water purchased or drawn from bore well = A  Liter/day (Bill of water purchase or flow meter reading of bore well)
Quantity of Effluent , liter per day = 80 % of ( A )




WASTE WATER FLOW RATES IN DIFFERENT UNITS:
Waste water consist primarily of used water, the water that reaches the sewer .
For different units it is different as shown in the chart .
Source
Unit
Range l/u/d
Typical l/u/d
Apartment
Person
200-340
260
Hotel resident
Resident
150-220
190
Hotel Employee
Employee
30-50
40
Individual Home
Person
190-350
280
Airport
Passenger
8-15
10
Automobile service station
Vehicle served
150-200
200
Restaurant
Meal
8-15
10
Office
Employee
30-65
55
Laundry
Machine
1800-2600
2200
Laundry
Wash
180-200
190
Hospital medical
Bed
Employee
500-950
20-60
650
40
School
Student
20-65
40
School boarding
Student
200-400
280
For Industries
80% of water used used in production will be released as waste water
Meat processing
Mg
15-20 cu mtr/ Mg
Milk Products
Mg
10-20 cu mtr/Mg
Bread
Mg
2-4 cu mt/Mg
Beer
Mg
10-16 cu mtr/Mg
Whisky
Mg
60-80 cu mtr/Mg
Paper Pulp
Mg
250-800 cu mt/ Mg
Paper
Mg
120-160 cu mtr/Mg
Textile Bleaching (Cotton)
Mg
200-300 cu mtr/Mg
Textile Dyeing (Cotton)
Mg
30-60 cu mtr/Mg
REF : WASTE WATER ENGINEERING : TREATMENT , DISPOSAL AND REUSE

--- METCALF & EDDY .



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