lake manzala engineered wetland, port said, egypt [iwc4 presentation]

Lake Manzala Engineered Wetland Project

GEF

Lake Manzala Engineered Wetland Port Said, Egypt

Dr. Dia El Din El-QuosyProject Manager

E-mail: [email protected]


GEF


GEF

Engineered Wetland

Studies (conducted in the 1980’s) suggested the use of Engineered Wetland to improve the water quality of Bahr El-Baqar drain, before entering the Lake Manzala.


GEF


In the early 1990’s, a project for constructing an engineered wetland, at the Bahr El-Baqr drain outlet, was approved as a collaborative effort among the GEF, UNDP and EEAA.


GEF


Project Area


GEF

Project Site



GEF

Project Purposes

• Assess feasibility of engineered wetland system to improve environmental conditions at Lake Manzala and Mediterranean Sea.

• Assess feasibility of engineered wetland system to treat wastewater so that it becomes suitable for different uses.

• Assist in transferring wetland technology to Egypt and other neighboring countries.


GEF

The project is designed to achieve the following:

• Provide local employment

• Serve as training center for water management and low cost wastewater treatment technologies.

• Project planning, design, construction, and operation will be accomplished so as to maximize stakeholders participation.


GEF


GEF

Detailed Project ElementsI. Collection works: 1- Intake channel

2- Pumping station

II. Treatment works:

3- Sedimentation basins3- Sedimentation basins

4- Drying Beds4- Drying Beds

5- Surface flow beds5- Surface flow beds

6- Subsurface Flow beds6- Subsurface Flow beds

III. Treated effluent disposal:

7-To Bahr El Baqr Drain

8-To Reuse area

9-Fish ponds

Lake Manzala Engineered Wetland

12

6

57

3

3

4

6

8


GEF

1- INTAKE

2- PUMP STATION

4- DISTRIBUTION Channel

5- SURFACE FLOW BEDS

6- RECIPROCATING (SUBSURFACE) CELLS7- HATCHERY PONDS

8- FINGERLING PONDS

3- SEDIMENTATION BASIN 1

2

4

5

5

6

7

8

3

3

Wetland Elements

Main Project (25,000m3/ Day )

Lake Manzala Engineered Wetland


GEF

Treatment System Components

ParameterUnitsSediment Basin

High Flow

Wetland

Low Flow

Wetland

Reciprocating Cells

Hatchery Ponds

Fingerling Ponds

FlowM3/d25,00021,5003,00050050450

DepthM1.50.50.51.21.11.1

AreaM233,30050,00050,0002,10064010,300

VolumeM350,00025,00025,0001,00070011,250

Retention timeDay21.28.321425


GEF

Inflow Design Criteria

Flow25,000 m3/d

BOD40 mg/l

COD100 mg/L

Suspended Solids

160 mg/L

Phosphorus5 mg/L

Nitrogen12 mg/L


GEF

Estimated Effluent Concentrations (mg/L)

ParameterSedimentHigh FlowLow FlowReciprocating

BasinWetlandWetlandCells

BOD2419.36.82.4

TSS328.44.88

Total P43.41.42

Total N1210.33.91.2


GEF

Estimated Treatment Efficiencies(%)

ParameterSedimentHigh FlowLow FlowReciprocating

BasinWetlandWetlandCells

BOD40207290

TSS80748575

Total P25156550

Total N0146890


GEF

Reuse of Wetland Effluent

The project is exploring the possibilities of reuse of the wetland effluent:

• Reuse for aquaculture (4 hatchery ponds and 2 fingerling ponds).

• Reuse for irrigated agriculture (cooperation with the NAWQAM project).


GEF

Before 1999

• The original project site was illegal fish ponds occupied by the surrounding community.

• The source of water for these fish ponds was Bahr El Baqar Drain, which is one of the most polluted drains in Egypt.


GEF

Before 1999


GEF

2000

After the Governorate of Port Said handed over the site to the project management, the following activities

had taken place:• Widening and leveling of the access rough road

• Evacuated the existing fish ponds from its polluted water

• Constructed an earth ring road around the site• Conducted a geotechnical study and ground survey

• Implemented the conceptual design by TVA• Finalized the detailed design by AAW

• Initiated construction of the main and pilot wetlands by Misr for Development Concrete Company


GEF

2000


GEF

2004

1. Construction of the pilot and main facility completed

2. The full operation started by October 2004.

3. The testing and commissioning took place by the end of 2004


GEF

2004


GEF

2005

Monitoring and evaluation phase started. Water was distributed according to the following schedule:

• 21,500 m3/day for five high speed free surface cells • 3,000 m3/day for five low speed free surface cells • 500 m3/day for two reciprocating subsurface cells

Measuring the concentration of the main pollutants: Total Nitrogen (TN), Total Phosphorous (TP), Biological Oxygen Demand (BOD), Total Suspended Solids (TSS), Heavy Metals (HM), Total, and Fecal Coliform (TC & FC), at the inlet and outlet of each cell to evaluate the performance of each.


GEF

2005


GEF

2006

The International Consultant (NIRAS & ECMA) suggested some modifications to the design such

as:• Modified the monitoring plan of KOMEX (Five cells with the same plants and different discharge and five

cells with the same discharge and different plants)• Install pipes with valves to control the influent and

effluent to and from each cell• Install ultrasonic sensors at the inlets and outlets of

the cells to measure the flows. • Install water level gauges at several points of the

facility• Change the plants of some cells (from reed to cattail

and papyrus)


GEF

2006

• On September 2006, NIRAS & ECMA modified the monitoring plan (locations, frequencies and

parameters). They eliminated the parameters which were not detected during the previous period such

as heavy metals and phenol and added some parameters to investigate special processes such as

dissolved phosphorus.

• On November 2006, In order to increase the level of accuracy, NIRAS & ECMA concentrated the sampling and analysis on three cells with different plant types,

different percentage of plant cover and different flows


GEF

2006


GEF

2007

On February 2007, NIRAS tested the performance of the wetland under 8,500 m3/day per one cell. The results of the data collected indicated that the cell is able to deal with this flow which means that the capacity of the wetland could be increased to 85,000 m3/d compared with the original design capacity of 25,000 m3/d. The conclusion may suggest that the dimensions of the wetland could be reduced substantially


GEF

2007


GEF

Removal Efficiency of the Pollutants

61.21%

81.03%

20.95%

52.39%62.12%

68.72%

25.93%

0102030405060708090

100B

iolo

gica

lO

xige

nD

eman

d

Tota

lSu

spen

ded

Solid

s

Tota

lPh

osph

orus

Tota

lN

itero

gen

Am

ouni

a(N

H4)

Nitr

ate

(NO

3)

Org

anic

Nitr

oen

Parameter

Con

cent

ratio

n (m

g/l)

0%10%20%30%40%50%60%70%80%90%

Influent Effluent Removal Efficiency


GEF

Removal Efficiency of the Pollutants

37,771

186,383

97 732

99.74% 99.61%

020,00040,00060,00080,000

100,000120,000140,000160,000180,000200,000

Fecal Coliform Total ColiformParameter

Con

cent

ratio

n (m

g/l)

0%10%20%30%40%50%60%70%80%90%100%

Influent Effluent Removal Efficiency


GEF

Concluding Remarks• The facility treats 25,000 m3/day with excellent

effluent quality

• The treated water is used for raising healthy fish suitable for human consumption

• The facility serves as a Center of Excellence for local, regional and international bodies

• Due to climatic differences between Egypt and Western Countries, retention time and dimensions

could be reduced substantially


GEF


GEF

Thank you for your kind attention

Dia El Din El Quosy

lake manzala engineered wetland, port said, egypt [iwc4 presentation]

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