HCU. Waste Water Treatment in Cairo, Egypt. HafenCity Universität Hamburg. Universität für Baukunst und Metropolenentwicklung
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1 HCU HafenCity Universität Hamburg Universität für Baukunst und Metropolenentwicklung Waste Water Treatment in Cairo, Egypt Abdallah Tawfic Wulan Diah Puspitowati
2 OUTLINE 1. General Facts 2. Water Facts 3. Water Quality 4. Initiatives & Programs 5. Waste Water Treatment Plants 6. Ecosan Projects 7. Conclusion
3 GENERAL FACTS Greater Cairo is the largest city in Africa & in the Middle East Peri Urban (Agricultural) Central Greater Cairo (high-density population) Desert Cities (Focus for development)
4 GEOGRAPHY AND POPULATION Area GREATER CAIRO HAMBURG 1,709 km 2 2X 755 km 2 X Population 17,816,00 1,751,775 Density 10,400/km 2 2,300/km 2 Picture source:
5 CLIMATE & PRECIPITATION GREATER CAIRO HAMBURG Average Annual Max Temperature 28 o C 13 o C Average Annual Min Temperature 16 o C 5 o C Average Annual Precipitation 26 mm 716 mm Number of Wet Days (Annual) Source:
6 THE NILE & POLITICS Water Consumers Others 10.0bcm 12% Sudan 18.5bcm 22% Egypt 55.5bcm Per year 66% Flow Contribution at Aswan Dam Atbara 13% White Nile 28% Blue Nile 59% 1 21 Sharing the Nile Under 1929 and 1959 treaty, 80% of the Nile s water is reserved for Egypt and Sudan. Damming the Nile GRAND ETHIOPIA RENAISSANCE DAM (GERD) Where: Blue Nile, +30 km from Sudan border Dam size: 145m high; 1,708m long Reservoir size: Floods 1,680 sq km; holds about 70 bcm of water. MAJOR DAMS 1 Aswan High Dams 2 Merowe Dam 3 Sennar Dam 4 Roseires Dam 5 Tana Beles Dam 6 Owen Falls Dam Grand Renaissance Dam
7 WATER FACTS The hydrogeological framework of Egypt (RIGW, 1993): The Coastal aquifer The Moghra aquifer The Karstified Carbonate aquifer The Nile aquifer The Nubian Sandstone aquifer The Fractured Rock aquifer Groundwater Source: 1. Non-Nile aquifer system: the Nubian sandstone. The total groundwater volume is estimated at 60,000 BCM. 2. Nile-originating system: the flood plain. The aquifer is mainly recharged as a result of activities based on the Nile water.
8 WATER FACTS Egypt is an arid country; The main source of fresh water is The Nile. Based on treaties among Nile riparian countries, rainwater may not be considered a reliable source of water. Egypt s share is 55.5 bn m 3 /year.
9 WATER FACTS
10 WATER FACTS
11 WATER FACTS The population is growing while the available water resources is limited and there is low coverage of wastewater services in the villages & rural areas
12 WATER QUALITY Reasons of Water Quality Deterioration Upstream of Cairo, the Nile receives large flows of mostly untreated domestic, agricultural, and industrial wastewater 43towns with population exceeding 50,000 and approximately 1,500 villages discharge their wastes to the Nile 2.3billion m3 of drainage water loaded with fertilizers, pesticides, and organic material is returned to the Nile annually, upstream to Cairo 125million m3 per year of industrial wastewater discharged from 35 major factories with little treatment.
13 WATER QUALITY Reasons of Water Quality Deterioration the number of wastewater treatment plants can not keep up with Population growth Increasing poverty level Inappropriate sanitation behaviors Health Impacts heavy metal poisoning, cancer, and bacteria and viral infections. High rate of children death caused by diarrhea Hepatitis A, E, Typhoid
14 WATER QUALITY 25% of the population is left without sewerage systems. 25% of the waste water is partially treated. 60% is carried raw via open canals to the Mediterranean sea.
15 MILENNIUM DEVELOPMENT GOAL Progress in Meeting the MDGs for Sanitation in Egypt The GoE has allocated 20 billions to cover the demands for 1000 villages of high priority through the current fiveyears plan. Urban The goal has already been achieved Rural The goal still has NOT been achieved
16 MILENNIUM DEVELOPMENT GOAL PROBLEM The low sanitation coverage and small capacities of the WWTP ACTION Clear strategy to raise the wastewater service coverage ratio in rural areas The strategy for rural sanitation applies the clustering concept for providing villages with similar conditions (geographic, environment, population, administrative boundaries) Implementing low-cost, lowenergy wastewater treatment techniques Up-flow Anaerobic Sludge Blanket (UASB) Septic Tank/modified septic tank Stabilization Ponds In-stream Wetland System RBC (Rotating Biological Contactor) Self treatment
17 INITIATIVES & PROGRAMS Goals Improving the Quality of Treated Wastewater applying low-cost & appropriate sanitation technologies Stimulating the involvement of Private Sectors in Reuse Projects Drinking & irrigation water tariffs have to be reviewed to achieve long term cost recovery for reuse related investments (long term sustainability) Shifting from the construction & management of regional sewerage systems to decentralized wastewater treatment facilities Purify, Distillate, Transport, distribute and sell drinking water in addition to collecting, treating and safe drainage of waste water.
18 INITIATIVES & PROGRAMS 1. Technical School for Water and Sanitation 2. Material about water conservation is included in the school curriculum 3. Raising awareness: arrange visit to water plants for school pupils;
19 INITIATIVES & PROGRAMS Goals Developing a program to support HCWW efforts to enlist private investor participation in agricultural ventures using treated waste water Use the treated wastewater in the same area where it was produced Separation of industrial waste away from the sewerage system Encouraging adequate & environmentally friendly WWT techniques
20 WASTE WATER TREATMENT PLANTS Waste water history
21 WASTE WATER TREATMENT PLANTS 6 operating wastewater treatment plants serving the Greater Cairo area 5 plants discharge through agricultural drains to the Northern Lakes and the Mediterranean, and the effluent from two plants will be used largely for desert irrigation and land reclamation 1plant discharges to the Nile, through an agricultural drain. Cairo's domestic wastewater is nearly completely conveyed away from the metropolitan area.
22 WASTE WATER TREATMENT PLANTS Gabal El Asfar WWT Plant, Cairo : North East of Cairo Phase I 1.7 M m3 6 M Inhabitant Phase 2 3 M m3 12 M Inhabitant Goals : To achieve total coverage of improved sanitation services throughout the country. To improve the quality of waste water discharged into the drainage system in Cairo East
23 WASTE WATER TREATMENT PLANTS Primary treatment (Mechanical) Secondary treatment (biological) Disinfection (including Chlorination) Solid waste treatment (produces Fertilizers + methane which is used to Run the plant) Gravel & sand Filter for irrigation & recreational
24 WASTE WATER TREATMENT PLANTS Impacts Improved health conditions have been monitored around the delta and east Cairo Surrounding farms irrigated by treated water producing olives, lemon, jojoba and cotton tree planted using treated water Fertilizers produced has improved surroundings soil conditions 70 % plant s electricity covered by the energy production of the plant
25 ECOSAN PROJECT Community-managed Wastewater Treatment System, Kafr el Sheikh North of Cairo Problem : 66% of rural areas around the delta are not connected to a sewerage system. Very often wastewater is running in the streets Objective : to establish a decentralized wastewater treatment system which is cost effective & efficient, allowing self-management by the village community.
26 ECOSAN PROJECT
27 ECOSAN PROJECT Impacts - sludge could be reused after a certain resting time in the drying beds. - Nitrogen and phosphorus can actually be an advantage if the treated wastewater was used for irrigation purposes - The community based approach and thus the participation of the population in each step villagers developed a sense of ownership and a feeling of responsibility towards the sanitation system
28 ECOSAN PROJECT Humification of Sewage Sludge in Minia, Nawaq South of Cairo Objective : Conversion of sewage sludge from waste water treatment plants to a product of high quality, which can be applied in a safe and effective way in agriculture, public gardening & landscaping as well as for wood production kg is the annual amount of solid matter in the sewage sludge per inhabitant in Egypt, which corresponds to a daily production of g a day.
29 ECOSAN PROJECT Converted sludge The principle of the Sewage Sludge Conversion is based mainly on the development of a soil-like environment in the sludge. This shall be reached by the cultivation of certain plants (grass, reed). The cultivation of grass and reed on the sludge and the penetration of roots leads to the establishment of different groups of micro-organisms in comparison with the normal air drying of sewage sludge. It leads also to the additional aeration of the sludge
30 ECOSAN PROJECT Dried Sludge big size and hardness of the lumps Low water storage capacity Low microbiological conversion of the organic substances during the short drying period Converted sludge Plants develop faster hygienic safety and high fertilizing value of the produced product Higher ability to adopt and to store water 30 l dried sludge 10 l dried sludge 10 l conv. 30 l conv. sludge sludge Without any soil conditioner
31 ECOSAN PROJECT Concerns: the potential for nitrate or phosphate contamination of waters. the potential for damage to soils, plants, animals, and humans because of possible toxic metal applications Limited information is available on the reactions of metals in municipal sewage sludge with soils the accumulation in plants poses a potential health hazard to animals, and humans. High potential for pathogen transfer
32 CONCLUSION Achievements Decentralization of the decision making Setting a clear vision for future (Master plan) Separation of operation and service provision Investment & rehabilitation plans Implementing new technologies Utilizing un-conventional water resources Achieving better governance Improving the produced water quality Building the capacity of the staff Unresolved Challenges The increasing spread of the informal settlements (technical problems) The low sanitation coverage specially in rural areas & slums Public/private sector participation in operating water and sanitation systems is still limited. Cost recovery is still very low The separation of responsibilities for investment and operation
33 Thanks for you attention Questions & comments
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