دراسة تقييمية لمياه الشرب فى مصر عموما وفى محافظة الشرقية خصوصا/SURVEY OF POTABLE WATER QUALITY PROBLEMS IN EGYPT GENERALY AND EL-SHARKIA GOV. ESPECIALLY

SURVEY OF POTABLE WATER QUALITY PROBLEMS IN EGYPT

BY

GENERAL.DR

BAHAA BADR

TECHNOLAB EL-BAHAA GROUP

ABSTRACT

all the environmental concerns that developing countries face, the lack of adequate
water of good quality is probably the most serious.

Safe potable water is very vital for
life.

The objective of this study is to survey and evaluate the variation in the potable
water quality in some selected Egyptian governorates.

The regions without safe
drinking water were delineated; the regions without enough drinking water supply and
the regions with problems in potable water networks had been identified.

Finally many
solutions of these problems have been recommended in order to help the decision
makers to improve the potable water quality in Egypt.

INTRODUCTION

Water is essential to sustain life, and availability of safe drinking water is very
important.

To ensure this, reliance has to be placed on regular bacteriological analyses
to assess potability and to determine the best course of action for protecting the
population against waterborne diseases.

Drinking water should be clear, cool, free
from objectionable tastes and odors and from harmful chemicals and microorganisms.

Of these desired sanitary qualities, freedom from harmful micorganisms is most
difficult to achieve.

It is not impossible, but it demands constant vigilance and
repeated testing.

The problem is made more acute because water sources are subjected
to contamination by human and animal wastes which most probably contains a variety
of bacteria, viruses and other microbial pathogens.

Water containing only a very few
pathogens in each liter may by sufficiently polluted to cause the spread of infectious
diseases such as cholera, typhoid, dysentery, hepatitis,... etc. Purification of water to be
used for drinking is therefore necessary and must be controlled by constant testing.

In Egypt, a plan for big water treatment plants has been prepared since the last two
decades to provide safe potable water, for rural areas and secondary cities.

This plan
was in need of time for design and construction of these plants.

So a decision for using
the water treatment compact units was taken as a temporary solution till the finish of
the big projects.

Now and after about 22 years of their application
, about 560 of these Compact units have been constructed in
Egypt, and the compact units become one of the options for production of potable
water as a permanent solution in rural areas of Egypt for both villages and towns

coagulated with alum, pre-chlorinated, filtered through 14 sand and carbon flters, postchlorinated
.and pumped from tanks through the distribution systems.

In the compact
units water is treated in the same manner as in conventional systems, but in the
compact systems filters are reduced to three sand filters.

The methods used for the
sanitary water analysis were those recommended by the American Public Health
Association .

Considering the drinking water resources, the individual’s expenditure in Egypt was
around 1000 m3/yr at a population size of 58 million.

By the year 2000 it decreased to
957 m3/yr which can be divided as 7% and 93% for the domestic use and the industrial
and agricultural uses, respectively.

Compared to the minimum
demand required per individual (1300 m3) it can be seen that Egypt is far below that
level.

It is worth mentioning that the per capita water income in the USA, India, China,
and the international level are 10.000, 2.430, 2.520, and 2.500 m3, respectively. Thus,
it can be concluded that the Egyptian water expenditure is about 38% of the
international level.

Egypt has 217 cities that are 100% covered by potable water network, while the
sanitation network covers only 38%.

· There are also 4617 villages, 43% of which are covered by potable water
network while sanitation network is extended to only 4%.

· The government’s plan up till the year 2012 regarding potable water and
sanitation is:

· Management of existing assets & facilities.

· Replacement of depreciated plants & networks.

· Establishment of new projects for the new communities.

In Egypt, the River Nile is the main source of drinking water and other purposes; every
effort should be made to achieve drinking water quality as high as practicable,
otherwise people life are extremely subjected to hazardous effects.

Proper selection
and protection of water sources to be used for supplying water treatment systems are
of prime importance in the provision of safe drinking water.

In the present research paper, the problems of potable water in Egypt were delineated.

The Sharkia Governorate was taken as a case study.

Four water treatment plants were
subjected to bacteriological and physico-chemical analysis following the APHA
standard procedures in order to determine the sanitary quality of the produced
water and its suitability for human consumption.

The investigated water treatment
systems were selected to represent the different running water treatment systems in
Sharkia Governorate.

2. Problem definition

The water treatment plants have got to face the following problems that largely affect
the quality of water produced

(a) The relatively high levels of alum dose and the relevant problems in terms of
aluminum residues in water and the duly high expenses of water produced.

(b) The relatively high levels of added chlorine to raw water (prechlorination) to
reduce total counts of bacteria and fungi and similarly the added chlorine to the
filtered water (postchlorination).

The high level of bacteria is ascribed to the
drained sewage, which leads also to growth of fungi and to increased amounts of
nitrogenous and phosphorous salts.

As the dose of chlorine increases, it leads to
increased concentration of organochlorinated compounds that are known as
carcinogenic and mutagenic.

Therefore, the well-known trend to replace
chlorination by ozonation for disinfection is actively suggested.

(c) The currently implemented processes of water treatment are inefficient in
removing residues of pesticides and organochlorinated pollutants.

Furthermore,
they are also insufficient in removing parasites, viruses, and other non-parasitic
microorganisms.

As a result, these residues of chemical and biological pollutants
may persistently remain in drinking water.

(d) The growing levels of biological and chemical pollutants in raw water impose
heavy burden on the efficiency of sand filters leading to blockages and
development of microbial colonies, such as Nematode larvae which may
eventually be present in drinking water.

Other difficulties are related to the drinking water distribution system, such as the
ageing of some networks, leakage to groundwater and sewer systems, deterioration of
municipal and buildings’ water reservoirs, and the chlorinated compounds.

SURVEY OF POTABLE WATER STATUS

The following section include a survey of the main problems of water supply is
illustrated including the deterioration of drinking water quality and the problem in
distribution networks

1. Regions with problem in network distribution

The survey deducted that the Behira , Kafr
el Sheigh , Kalioubia ,
Sharkia , Aswan , Beni Sweif and Elminia
has the following problems in network distribution:

· Aging of pipes that results in cracking and explosion in pipes

· the low water pressure in some regions due to informal pipes connections

· The increase in abstraction of water on the design rates due population increase.

· The loss in produced water due to the aging of networks and the non
maintenance of the public valves.

· No existence of cleaning valves in the end of pipes that results in the increase of
precipitation and reduction in the amount of water to consumers and the
increase in the probability of pollution

· No residual in chlorine in the end of pipes due to the increase in pollution due
to precipitation in pipes and the big length of pipes

2. Regions with problems in the use of compact water purifications plants
The following regions: Dakahlia ,
Bheira , Kafr Elsheikh , fayoum
, Ismailia , Kalioubia , Sharkia have the following problems:

· The intakes of these regions exist on end of canals and the low water level is
affected by the winter closure period.

· The high pollution of the river intakes due to the misuse of inhabitants such as
the cleaning of dishes, of animals and clothes).

· The operation and maintenance is done by unqualified trainees.

3. Regions with problems in water bacteriological pollution

There is bacteriological pollution in the groundwater in the following regions:

· Wells of Giza Governorate especially in Badrashin and Hawamdia regions.

· Wells of Sharkia Governorate especially in Zakaziq, Aboumetna and Fakous
regions.

· Wells of Kalioubia Governorate especially in Toukh, Kalioub, Kafr Shebibn
and Kafr Ragab regions.

4. Regions with problems in water chemical pollution

Potable water is not compatible to the healthy water regulations in some locations as
follows:

· Water is polluted in some regions with manganese as in Giza Governorate,
Gharbia Governorate.

Also high concentration of manganese is observed in
Assiut Governorate .

· Water is polluted in some regions due to the increase of iron and manganese
concentrations as in Minoufia
Governorate.

EL SHARKIA GOVERNERATE WATER TREATMENT PLANTS
CASE STUDY

El Sharkia Governorate is chosen as case study and includes many of the above
problems especially in Hosainia water treatment plant (34 thousands m3/day for 327
thousands capita) whose intake exits at the end of Salhia Canal.

A detailed survey of
this plant is conducted for 15 months and the analysis of water quality parameters
(Residual chlorine, total dissolved solids, chlorides, turbidity, calcium, sulfate,
Ammonia, Nitrate, Nitrite) are illustrated and the
results are compared with other water treatment plants in the same region such as
Abou Kebir, Fakous (51 thousands m3/day) and Kafr Sakr (102 thousands m3/day)
water treatment plants.

The results of the physico-chemical analysis of the potable water produced by the
different water treatment systems under investigation clearly establish the fact that all
values of the various parameter tested with respect to the treated water are compatible
with the recommended standards by the Egyptian regulation (1985) and WHO (1995)
guidelines.

The only exception is that the values of residual chlorine in the treated water produced
ARE above the standard. Also, the dissolved solids are very high at Elhosainia water
treatment plant due to the high drainage effluents from Elsalhia el Gedida area.

The results of the microbiological investigations revealed that the potable Water
produced by all of the 4 conventional water treatment plants were compatible with the
recommended standard by the Egyptian regulations.

However, these water treatment
plants exhibited different efficacies for turbidity and bacterial removal.

Residual Chlorine
0
0.5
1
1.5
2
2.5
3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
El hosainia
Egyptian
kafr sakr
WHO
fAKOUS
Abou Kebir

Residual Chlorine at the water treatment plants in Sharkia Governorate
Dissolved Solids

0
200
400
600
800
1000
1200
1400
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Month
mg/L
El Hosainia
Egyptian
Kafr Sakr
Fakous
Abou Kebir
WHO

Dissolved Solids at the water treatment plants in Sharkia Governorate

Chlorides
0
100
200
300
400
500
600
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
El hosainia
Egyptian
WHO
Kafr Sakr
Fakous
Abou Kebir

Chlorides at the water treatment plants in Sharkia Governorate

Turbidity
0
1
2
3
4
5
6
1 2 3 4 5 6 7 8 9 10 11 12
Month
El hosainia
Egyptian
kafr sakr
Fakous
Abou kebir
WHO

Turbidity at the water treatment plants in Sharkia Governorate

Calcium
0
50
100
150
200
250
300
1 2 3 4 5 6 7 8 9 10 11 12
El Hosainia
WHO
Egyptian
Kafr Sakr
Fakous
Abou Kebir

Calcium at the water treatment plants in Sharkia Governorate

Sulfate
0
50
100
150
200
250
300
350
400
450
1 2 3 4 5 6 7 8 9 10 11 12
El Hosainia
Egyptian
WHO
Kafr Sakr
Fakous
Abopu Kebir

Sulfate at the water treatment plants in Sharkia Governorate

Ammonia
0
0.2
0.4
0.6
0.8
1
1.2
1 2 3 4 5 6 7 8 9 10 11 12
El Hosainia
Egyptian
WHO
Kafr Sakr
Fakous
Abou Kebir

Ammonia at the water treatment plants in Sharkia Governorate

Magnesium
0
20
40
60
80
100
120
140
160
1 2 3 4 5 6 7 8 9 10 11 12
El Hosainia
Egyptian
WHO
Kafr SAKR
Fakous
Abou Kebir

Magnesium at the water treatment plants in Sharkia Governorate

Nitrate
0
2 4
6
8
10
12
14
16
18
20
22
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
WHO
El
Hosainia
Egyptian
Kafr Sakr
Fakous
Abou
Kebir

Nitrate at the water treatment plants in Sharkia Governorate

RECOMMENDATIONS

The main problem of potable water in Egypt can be summarized in:

1- The deterioration of operation efficiency of water treatment plants.

2- The ageing of water supply networks which affects the water quality and results in
increasing the loss in produced water with percentage 20-50% according to formal
statistics.

3- The weakness of technical experience required for operation and maintenance of
water treatment plants.

4- The increase of organic and chemical pollution of surface water and groundwater.

5- The use of one fixed system for the water treatment plants all over the country and
this is not compatible with the types of pollution in different places.

6- The actual price of water is not compatible with the real production cost.

Therefore the following items are recommended:

1- With respect to the water treatment systems:

The analysis and monitoring of water must be conducted to define the water
characteristics and identification of the biological and chemical pollutants through
the establishment of a database for the water type that must be purified and treated
for the production of healthy water and therefore identification of the optimum

treatment technique that realizes the following:

The ability of the system to remove all the pathogens in the treatment process,

There is no effects on the human health due to the use of disinfectant such as
chlorine that forms carcinogenic compounds after reaction with dissolved
organic matter in the main water source,

The system must guarantee the healthy potable water arriving to the consumer
through the water distribution network,

The system must be economic and easy to maintain and operate,

With respect to the production of water and distribution networks.
The production operation of water and distribution must have the following

components of any industrial production operation:

The raw material: the abstracted water,

The product: the pure drinking water,

The tools of production: the purification units,

The tools of product transportation: the distribution networks and the
connections to housing,

The market: the water consumers.

Therefore the following requirements must be fulfilled:

The management capable of developing the performance and realizing the
objectives and have the authorities to fulfill the responsibilities,

The trainee personals on all levels from the technical employees and
management,

The cost benefit analysis that realizes the self funding that guarantee the
coverage of operation cost, the maintenance and the expansion.

» مشاكل مياه الشرب وطرق معالجتها/Drinking Water Problems
» What are the drinking water standards?/المواصفات القياسية لمياه الشرب
» Design and Construction of Water Wells/اسس تصميم وبناء ابار مياه الشرب
» كيفية اجراء تحاليل المياه/water quality parameters
» المعايير البكترولوجية لمياه الشرب