- Used water and the sewage system problem
Djibouti has a sewage system
problem. This is because of the nature of the city's location and the existing
sewage network. The network has served for nearly thirty years without
maintenance or renewal. It is overly used by an increasing population, which has
increased in the middle class districts by ten times.
The state tried to drain the rain water which often flooded the roads
especially in popular districts, which in many cases, was mixed with the
flooding sewage water and remained stagnant for long weeks causing many diseases
such as malaria, diarrhea and cholera. This situation is repeated annually
during the rainy seasons, especially after each flood in the neighboring valley
or in the city, where most of the districts sink in water. Due to the lack of
financial resources, the state's intervention has been very limited.
The state has tried to control the sewage problems and established a
purification station. The capacity of its daily purification was 43000m3. Yet,
this station stopped working because of technical problems in 1994. Before it
stopped, the station used to receive 500m3 of used water daily which was less
than one eight of its actual capacity because it was not connected with all the
districts' networks. This station was supposed to serve districts with a
population up to 30,000. The technology used was not in line with the country's
technical and financial situation, thus, the high level of technology used was
the reason behind its failure. There remained no choice but to continue draining
the untreated wastewater to the sea.
The sewage network, which is 16.5 km long, is not the only way to get rid of the
used water. Most of the capital districts, especially the northern high
standards ones, use septic tanks. On the other hand, the popular districts in
the south use ordinary ground holes. The city is made up of thirty districts,
seventeen of which use septic or ordinary tanks, i.e., individual sewage
drainage. Eleven districts use the sewage network, and two use the two methods
together. Evidently, most of the capital's population uses the individual sewage
drainage even though it has many side effects. Yet, these districts do not
suffer from flooding problems. And they do not have direct impacts upon the sea.
According to a study conducted in 1996, 40% of the population were formally
connected to the water network. In most of the suburbs and popular districts,
people drilled wells inside the boundaries of their houses, where they also
drilled ordinary ground holes for toilet purposes. This resulted in the spread
of many diseases, which led in turn, to the increase of death rates among
children in the capital, where it reached 147 out of 1000 children less than
five years old. Yet, the situation improved to 114 out of 1000 children in 1991
where 42% of the families did not have a good system for wastewater drainage.
There is also the liquid industrial waste even though there is little
industry in Djibouti. These include fuel, used oil, petroleum and non-petroleum
liquids and highly salinated water drained from factories. This liquid waste is
drained in the southern part of the city leading to the pollution of
groundwater, which in turn is used as potable water. It also results in air
pollution due to the smoke and gases that result from the burning of these
fuels.
- Proposals for improving the performance and the capacity of the solid waste
public dump site in Douda
Several procedures have to be taken in order to
improve the level of equipment and workers' performance as follows:
- Repairing all machines, renovating the infrastructure and buying some
necessary equipment.
- Increasing the number of technicians, drivers and manual labor.
- Adopting a special system for the dumpsite.
- Putting water reservoirs and empty spaces at the disposal of the dump site
administration for the purpose of fire extinguishing.
- Constructing shields around the dump site in order to limit its impact upon
the environment.
- Raising the efficiency of combating intruders into the dumpsite.
- Raising the efficiency of the maintenance system of machines and vehicles.
All these procedures and investments require financial resources and effort.
Yet, they would improve the dumpsite's capacity and its efficiency in the
future. In this respect, a proposed study project financed by the African Bank
for Development would show the best ways to be followed in the field of waste
collection, processing and recycling part of the waste to produce organic
compost.
The technical department in the governorate has already proposed the
utilization of organic waste in the production of compost. If this project is
implemented, it would lead to a longer sustainability of the Douda public
dumpsite, which would last longer, and it would also improve the soil fertility.
As a matter of fact, the establishment of a waste sorting station and
fermenting waste used for making fertilizers in Douda is not a new idea, it was
already considered when the dump site project was implemented in Douda. A was
provided for building the factory for manufacturing fertilizers and its
different units. The location of the dumpsite was carefully chosen next to the
station of wastewater treatment station so that it would respond to the needs of
the factory, it is also located next to the agricultural areas in Douda and
Humbli which would provide them with the manufactured organic fertilizers.
The project has to be implemented in Djibouti to serve the urban environment
and develop the growth of gardens which have the problems of bad soil quality
and water salination. This system could be easily operated. Meanwhile, a
feasibility study has to be made with respect to the quantity of organic waste
received by the dumpsite. The basic agricultural sectors have to be detected and
tested, as well as the required quantity per hectare, the level of
fertilization, the locations and the type of agriculture have to be examined and
discussed in the preliminary study.
- Summary
Although it is important to acquire advanced equipment in this
field, there are several basic factors for building the capacity of specialized
personnel responsible for collecting and treating waste:
- First: Development of human skills in the technical department of the
governorate, The incompetence of technicians and the shortage of their number
would have repercussions upon the equipment's lifetime. The actual structure of
this department has to be changed in a way that would correspond to the current
development in the city. Decentralization is a must so that, cities can manage
their own financial resources.
- Second: Raising public awareness: people have to understand the importance
of protecting their urban environment. They have to know their key role in
taking care of the environment for the state cannot do everything. It cannot act
alone in this field even if it is provided with all the resources. The
individual has to know that improving his environment means improving his
health.
- Third: The return of refugees and immigrants to their original neighboring
countries: Otherwise, any effort would be fruitless, as it has been proven
before.
- Fourth: Preparation of awareness programs for the urban population in order
to improve its contribution to the protection of the environment. This could be
done through radio and television as well as advertisements and the press. This
project is important because of the social conditions in Djibouti. It can be an
experimenting project for the neighboring states provided that it would include
training and exchange of visits for workers and technicians in the field of
collecting and treating waste. The cost would not exceed 18 million Francs
(100,000 US dollars).
- Fifth: Preparation of a transition lot for waste in Balbala, in which the
daily waste would be stored before it is transferred to the public dumpsite by
bigger trucks. This operation has two advantages:
1- The trucks' efficiency would be improved. Workload would be less and fuel
would be saved. It is worth mentioning that the trucks go to Douda half full.
This, in itself, is a waste of time, effort and fuel.
2- At this stage, it is possible to get rid of some heavy materials in the
waste. It would be an advanced sorting out stage. The project would include
fences for the lot, containers and other equipment. The project would cost
around 35 million Djibouti Francs (180,000 US dollars).