‫بسم هللا الرمحن الرحيم‬
Al-Najah National University
Engineering College
Civil Engineering Department
Analysis Of Nazlat Issa village Water Distribution Network
& Design Wastewater Network And Treatment Plant
Prepared by:
Mahmoud Abo- Alshwareb
Waseem Khalf
Ayaa hisham Obeeis
supervisor:
Abdel Fattah Hassan.PHD
Spring, 2011
Introduction
 Water is the main source that all aspects of life depend on it.
 The Palestinian society is suffering from lake available
resources in addition the Israel politics in water resource.
 So our project stand up to study water distribution network of
Nazlet Issa , design wastewater collection and treatment plant.
Purpose of the project
In this project:• Analysis of Nazlet-Issa water network, and Redesigning of new
water distribution system
• Design a new wastewater collection system
• Design wastewater treatment plant system.
background
 The water network in the village is not adequate because the
leakage is high.
 The network needs improvements such as add new pipes to
reach the new building to adequate increasing of current
population and in future.
 Theirs no waste water network in the village that causes
Pollution of the ground water& The rainfall causes damage to
roads.
 Design wastewater treatment plant system for healthy village
Study area
 Nazlet-Issa Village.
 Population (2010): 2450
capita.
 Number of houses in 2010:
420 unit.
 Total area of village is 4200
donums .
 Roads Length is 9 km.
Population
 The value of growth rate we
calculate by division the
village into three region.
 To estimate the growth rate
equal 1.9and using equation
 PF= Po (1+i)n
Water distribution network
description
Water distribution network
description
Input data
Pipes diameters in exist network are 2,3,4,6 inch. 
Water consumption is 120 letter per capita per day . 
 We use family rate equal 6 person(Questionnaire)
 Design the network on future and maximum, minimum hourly
,daily factor
Population
Population
Demand
node #
#house
2010
demand(m3/h)
2040
(m3/h)
2
6
36
0.18
64
0.32
3
7
42
0.21
74
0.37
4
33
198
1
348
1.74
Water distribution network
Results
 Diameters are acceptable
 Pressure head are acceptable ,range(16-60)m
 Velocity in pipes are acceptable and the minimum velocity
equal zero because the daily demand few and this network are
design more than 2450 number of population, maximum
velocity equal 0.42m/s in future .
Pressure zone from d plot program
Y (m)
P (m)
X (m)
Recommendation
 The network good service for people
 We advice do not use the water network for agriculture
beause it need high pressure that cause corrosion for pipes.
Wastewater collection description
 Nazlet Issa village has no wastewater collection so, there is a
need to design it.
Design Criteria:
• Age of the network 30 years.
• Waste water production is 85%of water consumption(100
letter per capita per day)
• The distance between manholes is 50 m.
• The velocity limits are in the range of (0.6-3)m/s.
• Minimum pipe diameter 8 inch.
Result
after we design the network by hand calculation we get the
following result:
1. The pipes diameter used in the network 8,10 and 12 inch and
the material of it is ( UPVC)..
2. The number of manholes used in network is 172, and the
material of it is concrete .
Result con……..
Table of pipe diameters
Pipe diameter
Length
8 in (200 mm)
4902
10in(250 mm)
2445
12in(300 mm)
647
Result con …..
 In the next two slides we show in first the map of wastewater
collection system and in the second a profile take from section
in the network
Conclusion and Recommendation
 In the design we depend on gravity to transport the wastewater
and we didn't need any pump .
 In some pipes the velocity is small than 0.6 m/s because this pipes is
sub pipe and there is a little flow income to it.
 We add 5% of the flow to cover the infiltration to the network
 After the completion of the design process we ensure the safety of
the design and see that the network meets the needs of citizens
during the design period
.
Wastewater treatment plant
description
 Design the wastewater treatment plant for healthy village to allow human and
industrial effluents to be disposed of without danger to human health &to the
natural environment
 Design criteria of wastewater treatment plant :
 15 years.
 Temperature range 16and 17 Co
 Waste water production is 85%of water consumption(100 letter per capita per
day)
 BOD 50gramm per capita per day.
Figure(1) show the location of plant where
pointed
Wastewater treatment plant
description continuo………
Wastewater Treatment its contain three main areas:
 Preliminary treatment
 Physical process
 Remove/grind “big things”, grit
 Primary treatment
 Physical process
 Remove non homogenizable solids and homogenize the remainder
 Secondary treatment
 Biological process
 Removes BOD
Figure(2) show the typical process of waste water treatment
plant
Result
 Preliminary treatment include:
1. Screen
• Screen dimension:
height equal 1m, the width equal.15 m, number of opening,(
n)equal 8
•
efficiency equal 53%
•
headloss of the rack equal .03m
Figure(3)
Figure (3&4)shown coarse &fine screens
Figure(4)
Result Continuo………..
2- grid chamber :
 Dimensions :
Width equal0.8m Depth equal 1.2m
&length equal1.7m
 Each of the two chambers has
a size of 0.8m*m1.2 m*1.7 m
the figure (5) shown grit removal
Result Continuo………..
 Primary Sedimentation(Circular basin design)
• Circular basin design dimensions:
the tank diameter(D) equal 3.5m,the tank side
width depth(SWD) equal 3.3m
• weir length equal 2.6m,so choose two weirs
on each side of the perimeter of
circular tank =1.3m,1.3m
• Detention time(to) equal 2.3m
• overflow rate(VO) equal3.4 m3/m2.d
figure(6) shown
primary sedimentation
tank
Result Continuo………..
 Secondary treatment include two stage of Trickling filter
 first -stage Trickling filter
• Dimensions :
Depth of the filter equal 3m, Diameter of the filter equal9m
• Choose area of the media(AS)equal 40m2/m3
• Efficiency of the filter Temperature 16C equal 70%
Result Continuo………..
• second-stage Trickling filter
• Dimensions :
Depth of the filter equal 2m, Diameter of the filter equal9m
• Choose area of the media(AS)equal 40m2/m3
• Efficiency of the filter Temperature 17C equal 55%
• total Plant BOD Removal Efficiency at 17C equal 91%
figure(7) shown Trickling Filter fill with rock media
Discussion
 After this effort of collecting data, design &analysis with the
design criteria for each unit of wastewater treatment plant
 The quality of treated wastewater compared to Palestinian
standard is accepted .
 so if we treat waste water in high efficiency and with
acceptable standards we can cover our future need from
water.
Conclusions& Recommendations:
 the Palestinian society is suffering from lake available
resources in addition the Israel politics in water resource .so
we have make use of treated waste water to cover our need.
 This amount of treated wastewater can use for irrigation so
small farmers often prefer wastewater because its high
nutrient content reduces or even eliminates the need for
expensive chemical fertilizers.
 The wastewater treatment plant has benefits in our life&
environment
Thank you for
lessening