الرحيم الرحمن الله بسم

Sanitation Study and wastewater collection system conceptual design

for Beita Town

byHamadalla Alsayyed

Shehada Dweikat

under the direction of Dr. Sameer Shadeed

2011-2012

INTRODUCTION

Sanitation situation reflects the development of communities.

Health of people is also related to the sanitation situation.

Existing of sewerage system consider an indication of a good sanitation situation.

Beita is not served by a sewerage system.

Introduction

Identify the existing sanitation situation.

Identify the water supply system and sanitation problems.

Conceptual design of wastewater collection system.

Project Objectives

Project Location

Methodology

Data Collection

Questionnaire

Municipality Citizens

Analyze Data

AutoCad Civil 3D

SewerCad

STUDY AREA

Topography

Population Design year for the sewerage system is

2040.

Forecasting population using: Pn = P0

Year Growth rate % Population

2010 - 1000

2010-2020 3 13439

2020-2030 2.8 17713

2030-2040 2.6 18185

Mean Monthly Temperature

Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.0

5

10

15

20

25

30

Monthly Rainfall

Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.0

20

40

60

80

100

120

140

160

The main source is from Mekorot company.

Several springs

Water Source

QUESTIONNAIRE

Questionnaire was developed to collect information needed.

It was include:

• Household information • water consumption • waste water• Solid waste• General health and hygiene

Questionnaire

Sampling

Sample size is 70.

Average number of family members is 7.

Average size of cesspit is 32.5 m³.

Average volume of solid waste is 5 kg/day.

60% have a cistern, while 40% does not.

Data Analysis

WATER DISTRIBUTION SYSTEM

Beita is served by WDN since 1996.

The state of WDN is good.

The Avg. lost is 32%.

The adequacy of water

Water Distribution System

11%

74%

15%

excellentmediumweak

Water Consumption

Average Monthly Rate

GENERAL HYGIENE SITUATION

The hygiene situation is good.

General Hygiene and Sanitation

Solid Waste The amount of disposal solid is 20 ton/day.

700 gm solid waste per capita.

The number of containers in general is enough.

Landfill ground is rocky and contains large pits.

Status of landfill is very bad.

The waste is burn in unhealthy way.

Landfill

Wastewater discharge using cesspits.

95% is percolating and 5% is septage.

Trucks are used to emptying from cesspits.

Disposal of Wastewater

Sewerage Collection System

Look !!!

Separate system from storm water is used.

Side of the network.

System characteristics

The design per capita water consumption to 120 l/c.d.

Quantity of waste water is 75 % of the consumed water.

Wastewater Production

Population Density

The Area Area Description Current Density(Capita/dunum)

predicted Density(Capita/dunum)

1 Beita alfouqa 21 25

2 Beita altahta 30 35

3 Beer quza 6 15

4 Almahfrah 6 15

Velocity range 0.6 – 6 m/s.

Minimum diameter 200 mm.

slope range 1% -12 %.

Cover range 0.8 – 5 m.

Design Criteria

Design of Sewerage System

Design Program

Supplementary Program

Design Steps

Network Layout

Total number of manholes is 1146.

Total length of pipes is 33.739 km.

The diameter of pipes vary between 200 mm and 300 mm

Total number of outfalls is 3.

93% of the town is served.

Sample Calculation

Profile

Outfalls

Number of outfall Inflow (m3/d)

1 720

2 2100

3 3180

CONCLUSION&

RECOMMENDATION

Sewerage collection systems is conventional gravity type.

Sewer outfalls and trunk mains design sized for the future development.

The pipes material used is uPVC.

Maximum distance between manholes ≤ 50 m.

Conclusion

Surveying points for roads instead of contour map.

Areas not served may use individual house connection.

Use pumps to transfer the wastewater to WWTP.

Recommendation

Thank you