PROJECT: SCA CARGO IN PHNOM PENH

SECTION: WATER SUPPLY SYSTEM

DATE: 20-Mar-08
REV.: 00

COLD WATER BOOSTER PUMP CAPACITY

1. Water Supply Flow Rate Required

Item Description Fixture No. U/Flow Rate T/Flow Rate

1.1 Water Closet 26 0.10 2.600
1.2 Wash Basin 27 0.10 2.700
1.3 Urinal 9 0.10 0.900
1.4 Sink 0 0.20 0.000
1.5 Shower 0 0.15 0.000
1.6 Buthtub 0 0.25 0.000
1.7 Garden Taping point 0 0.40 0.000
1.8 Swimming Pool 0 1.00 0.000
TOTAL: 62 6.200

Total Sanitary Fixture : 62 set

Total Flow Rate : 6.200 l/s

K Facture : 0.128 l/s

Total Water Flow Required : 0.794 l/s 2.85778 m3

2. Pump Pressure Head Required

- Pressure at highest draw-off point : 10.000 m

- Heigt from pump to highest draw-off point : 12.000 m

- Pipe friction losses : 10.000 m

Total Pressure Head Required : 32.000 m

BOOSTER PUMP CAPACITY:

- WATER FLOW RATE: 2.6 M3/H
- WATER PRESSURE HEAD: 3.2 BAR

References:

a Water Flow Calculation

- Le Formulaire Des Installations Sanitaires, Tome 1, Eau Froide (French Standard)

b Pipe Sizing
- Le Formulaire Des Installations Sanitaires, Tome 1, Eau Froide (French Standard)
- 1997 ASHRAE Fundamentals Handbook
 SEPTIC TANK CALCULATION

1. Sewage Quantities Required

Table 1.1: Quantities of Sewage Flow

ITEM TYPE OF ESTABLISHMENT GALLONS PER PERSON PER DAY
1 Small dwelling with seasonal occupancy 50
2 Single famaly dwellings 75
3 Multiple family dwellings 60
4 Rooming houses 40
5 Boarding house 50
6 Hotels with private bath 50
7 Hotels with private baths (2 persons per room) 60
8 Restaurants (toilet and kitchen wastes per patron) 7-10
9 Restaurants (kitchen waste per meal serve) 2.5 - 3
10 Tourist camps or trailer parks with central bathhouse 35
11 Tourist courts or mobile home parks with ind. Bath 50
12 Tourist camps night and day with limited plumbing 50
13 Luxury camps 100 - 150
14 Work or construction camp 50
15 Day camps no meals serve 15
16 Day schools without cafeterias, gym. Or showers 15
17 Day schools with cafeterias, gym. Or showers 25
18 Day schools with cafeterias but w/o gym. Or showers 20
19 Boarding schools 75 - 100
20 Hospitals 150 - 250+
21 Institutions other than a hospitals 75 - 125
22 Factories (exclusive of industrial waste) 15 - 35
23 Picnic parks with toilet, bath houses 10
24 Swimming pools and bath houses 10
25 Luxury residences 100 - 150
26 Country clubs (per resident member) 100
27 Motels (per bed space) 40
28 Motels with bath, toilet, and kitchen wastes 50
29 Drive in theaters (per car space) 5
30 Movie theaters (per auditorium seat) 5
31 Airport (per passenger) 3-5
32 Stores (per toilet room) 400
33 Service stations (per vehicle sered) 10
34 Self service laundries (gal per wash per person) 50
SOURCE: Manual of Septic Tank Practice. Public Health Service Publication

OFFICE BUILDING
Total Staff: 1054 peoples

- Reffering to Table 1.1 under Day school without cafeterias, gym or showers and Office, the quantities
of sewage flow is 15 gallons
So the total volume of sewage flow is:
= 500 x 75 gallons = 15810.00 gallons

- Using the formula:

Vg = 1125 + 0.75 Q
Where:
Vg = the liquid volume of the tank in gallons
Q = the daily sewage flow in gallons
 1125 and 0.75 is constant value

Therefore:
Vg = 1125 + 0.75 x 30000 = 12982.50 gallons

There are 264 gallons per 1 cubic meter, therefore, dividing Vg by 264 we get the requireed volume of the
septic tank in cubic meter, thus:
Vcu.m = 23625 : 264 = 49.176 cu.m

- To find the dimention of the septic tank

Length x Width x Depth = Volume
Length = Volume : (Width x Depth)
Where:
Maximum depth for septic tank is 1.50 m
The width is assumed to be 2.0 m

L = (8.523 cu.m) : (2.0 m x 1.50 m) = 16.39 m

- The value of L is only for the length of the digestion chamber. Divide it by 2 then add to the value of L.
Thus:
L/2 + L
= 2.84/2 + 2.84 = 24.59 m

KITCHEN AND SMALL TOILET ROOM

- For the kitchen and small toilet room just have smal amount of sanitary fixture, so we take the minimum
requirement of volume septic tank
So the minimum dimention is:
- Minimum width: 0.90 m
- Minimum length: 1.50 m
- Minimum depth: 1.20 m

- The value of L is only for the length of the digestion chamber. Divide it by 2 then add to the value of L.
Thus:
L/2 + L
= 1.50/2 + 1.50 = 2.25 m

References:

PLUMBING Design and Estimate (Second Edition)

 COLD WATER PIPE SIZING

1. Water Supply Flow Rate Required

1.1 Section A-B
Table1-1: Proper Flow Rate Required During Flow For Different Fixtures
Item Description Fixture No. U/Flow Rate T/Flow Rate
1.1 Water Closet 2 0.10 0.200
1.2 Wash Basin 3 0.10 0.300
1.3 Urinal 0.10 0.000
1.4 Sink 1 0.20 0.200
1.5 Shower 2 0.15 0.300
1.6 Buthtub 1 0.25 0.250
1.7 Garden Taping point 0.40 0.000
1.8 Swimming Pool 1.00 0.000
TOTAL: 9 1.250

Total Sanitary Fixture : 9 pcs

Total Gross Flow Rate : 1.25 l/s
K Coefficient Simultaneous : 0.354
Probable Flow Rate : 0.442 l/s 1.59

Pipe Sizing : 25 mm
Volocity : 2.83 m/s
Pressure Drop : 3294.46 Pa/m

References:

a Water Flow Calculation

- Le Formulaire Des Installations Sanitaires, Tome 1, Eau Froide (French Standard)

b Pipe Sizing
- Le Formulaire Des Installations Sanitaires, Tome 1, Eau Froide (French Standard)
- 1997 ASHRAE Fundamentals Handbook
 SOIL AND WASTE PIPE SIZING

1. Drain Flow Rate Required

1.1 Section: Septic tank 2 to Manhole 5
Table1-1: Proper Flow Rate Required During Flow For Different Fixtures
Item Description Fixture No. U/Flow Rate T/Flow Rate
1.1 Water Closet 2.00 0.000
1.2 Wash Basin 0.70 0.000
1.3 36 0.70 0.000
1.4 Sink 0.70 0.000
1.5 Shower 0.40 0.000
1.6 Buthtub 0.80 0.000
1.7 Floor drain 8 0.80 6.400
TOTAL: 8 6.400

Total Sanitary Fixture : 8 pcs

Total Gross Flow Rate : 6.40 l/s
K Coefficient Simultaneous : 0.378
Probable Flow Rate : 2.419 l/s

Pipe Sizing : 100 mm

Volocity : 0.86 m/s
Slope : 1.80 %

1.2 Section: Manhole 5 to City drain

Table1-1: Proper Flow Rate Required During Flow For Different Fixtures
Item Description Fixture No. U/Flow Rate T/Flow Rate
1.1 Water Closet 210 2.00 420.000
1.2 Wash Basin 205 0.70 143.500
1.3 Urinal 9 0.70 6.300
1.4 Sink 205 0.70 143.500
1.5 Shower 0.40 0.000
1.6 Buthtub 0.80 0.000
1.7 Floor drain 400 0.80 320.000
TOTAL: 1029 723.310

Total Sanitary Fixture : 1029 pcs

Total Gross Flow Rate : 723.31 l/s
K Coefficient Simultaneous : 0.031
Probable Flow Rate : 22.559 l/s

Pipe Sizing : 100 mm

Volocity : 0.83 m/s
Slope : 1.50 %

1.3 Section: Septic tank 1 to City drain

Table1-1: Proper Flow Rate Required During Flow For Different Fixtures
Item Description Fixture No. U/Flow Rate T/Flow Rate
1.1 Water Closet 240 2.00 480.000
1.2 Wash Basin 240 0.70 168.000
1.3 Urinal 6 0.70 4.200
1.4 Sink 120 0.70 84.000
1.5 Shower 0.40 0.000
1.6 Buthtub 0 0.80 0.000
 1.7 Floor drain 360 0.80 288.000
TOTAL: 966 1024.200

Total Sanitary Fixture : 966 pcs

Total Gross Flow Rate : 1024.20 l/s
K Coefficient Simultaneous : 0.032
Probable Flow Rate : 32.970 l/s

Pipe Sizing : 150 mm

Volocity : 0.88 m/s
Slope : 1.00 %

7380

References:

a Water Flow Calculation

- Le Formulaire Des Installations Sanitaires, Tome 3, Evacuations Fluides Divers
(French Standard)

b Pipe Sizing
- Le Formulaire Des Installations Sanitaires, Tome 3, Evacuations Fluides Divers
(French Standard)