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July 2012 Volume 1 Issue
4
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N'diaye AD
Khalid IN
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Gobal Advanced Research Journal
of Environmental Science and Toxicology
July 2012 Vol. 1(4), pp. 080-086
Copyright © 2012 Global Advanced Research Journals
Full Length
Research Paper
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Survey of physical-chemical and microbiological
quality of
wastewater of the WWTP effluent in Sebkha
(Nouakchott, Mauritania)
Abdoulaye Demba N’diaye1, 2*,
Mohamed Ould Sid’ Ahmed Ould Kankou3
and Khalid IBNO NAMR 1
1Unit
Soil Science and Environment (LGMSS- URAC45),
Departement of Geology, Faculty of Science-
University Chouaib Doukkali P.O. BOX- El Jadida
2400, Morocco.
2Laboratory
of Water Chemistry, Toxicological and Environmental
Service, National Institute for Research in Public
Health from Nouakchott, P.O. Box 695, Mauritania.
3Laboratory
of Chemistry of Water and Environment, Faculty of
Science and Technology of the University of
Nouakchott, P.O. Box 5026, Mauritania.
*Correspondence Author E-mail:
abdouldemba@yahoo.fr; Tel: 212 (0) 523 342 325/
343 003
Accepted 30 May, 2012
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Abstract |
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The present investigation was conducted to survey
the physicochemical parameters (temperature, pH,
electrical conductivity, chlorides, nitrates,
ammonia, orthophosphates and chemical oxygen demand)
and microbiological (coliform coliforms and fecal
streptococci) in the effluent of the WWTP in the
scope of vegetable Sebkha. Thus, monthly samples of
wastewater were carried out of the WWTP between
January and December 2009.
The results of
physicochemical analysis presented in this work have
shown those temperatures between 23.9 ° C and 31.3 °
C. The pH is between 6.91 and 8.17.
The pH oscillates between neutrality and basicity.
The salinity of the effluent was observed by
measuring the electrical conductivity and chlorides
giving respective maximum values of 7000 µS/cm and
1633
mgL-1
However, the effluent of the WWTP contain potential
reserves of nitrogen compounds and phosphate.
The microbiological
results show that the microbial load of fecal
coliforms and fecal streptococci is very important.
The levels of fecal coliforms and fecal streptococci
varied respectively from 1, 1.104 cfu/100 mL to
2,8.104 cfu/100 mL and from 1,2.103
cfu/100 mL to 3.104cfu/100 mL. The
presence of high bacteria indicators of fecal
contamination is undoubtedly a threat to the market
garden, the children of farmers, retailers and
consumers.
Keywords:
Physico- Chemical, Microbiological, Effluent,
Sebkha, Nouakchott, Mauritania.
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