Microbial examination of drinking water supply systems of Elobeid city, Sudan

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Research Paper 01/12/2016
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Microbial examination of drinking water supply systems of Elobeid city, Sudan

Abdelrahman Ahmed Mohammed, Ahmed Ali Mahdi, Adam Ismail Ahmed
Int. J. Micro. Myco.4( 5), 1-7, December 2016.
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Abstract

The present investigation was carried out to evaluate the microbial parameters of Elobeid drinking water supply systems, which comprise of Bara underground water system and the surface rainwater harvesting (RWH) system, during the period from July 2010–June 2011. Four samples from Bara and nine from RWH were collected. The microbial parameters were determined using different microbial techniques. The results showed that the mean total viable bacterial (TVC) and spore-forming bacteria counts in the RWH system were ranged as 80.26-1030.11 and 82.8-3479.8 cfu/ml, respectively and 4.67-110.5 and 0.83- 292.5 cfu/ml, respectively in Bara. Moreover, high counts of coliforms, faecal coliforms; faecal Streptococci, Salmonella, Staphylococci, Clostridia and Cyanobacteria were recorded in the RWH system, particularly during the rainy months (June–September), which not in agreement with international or local standards for drinking water. The predominant bacteria in the two water supply systems were Bacillus (6 species) Proteus mirabilis, Pseudomonas aeruginosa, Pseudomonas maltophilia, Enterobacter gergoviae, Enterobacter alvi, Proteus vulgaris, E. coli, Salmonella choleraesuis, Staphylococcus aureus, Streptococcus faecium and Streptococcus faecalis, in addition to many Cyanobacterial genera: Lyngbya, Microcystis, Oscillatoria, Synechocystis, Anabaena, Leptolyngbya, Dermocarpa, Aphanizomenon, Schizothrix and Phormidium. The presence of those harmful bacteria in water before and after treatment in the RWH system indicated that water treatment measures adopted by the North Kordofan State Water Corporation (coagulation, sand filtration and disinfection by chlorination) do not guarantee acceptable levels of water disinfection. To alleviate these problems, blending of the two water systems and subsequent treatments to reduce microbial load were suggested as recommended point of view.

VIEWS 12

Abdel Magid HM, Ibrahim IS, Dirar HA. 1984. Chemical and microbiological examination of well and Nile water. Environmental International 10, 259-263. DOI:10.1016/0160-4120(84)90243-5.

Ahmed IF. 2005. Microbiology Quality of Water in Some Food Factories Storage Cisterns in Khartoum North Industrial Area. Ph.D. Thesis, Faculty of Agriculture. University of Khartoum.

APHA. 1980. Standard Methods for the Examination of Water and Waste Water, 17th .Ed. American Public Health Association Inc., Washington DC.

Barrow GI, Feltham RKA. 2003. Cowan and Steel’s Manual for the Identification of Medical Bacteria, first paperback ed., Cambridge University Press. Cambridge London.

Bitton G. 2005. Microbial Indicators of Faecal Contamination: Application to Microbial Source Tracking. Report submitted to the Florida Storm water Association 71pp.

Brenner DJ. 1984. Facultatively Anaerobic Gram-Negative Rods. Sec.5.In: Bergey’s Manual of Systematic Bacteriology 1st Ed. 1, 409-598.

CBS. 2011. Central Bureau of Statistic. 5th Population and Housing Census, 2008, Analytical Report, North Kordofan State. Ministry of the Cabinet, Khartoum, April 2011.

Daw El, Beit EN. 1999. Consequences of Coping with Drought in North Kordofan, M.Sc. Thesis, University of Coventry, London, England.

Dirar HA.1986.Coliform bacterial counts in the Nile water at Khartoum. Environmental International12, 571-576. DOI:10.1016/0160-4120(86)90153-4.

El Tom AM. 1997. Microbiology of Port-Sudan Water Supply. Ph.D. Thesis, Faculty of Agriculture, University of Khartoum.

Elrofaei NA. 2000. Microbiology Examination of Drinking Water from the Displaced People Living Around Khartoum State. Ph.D. Thesis, Faculty of Agriculture. University of Khartoum.

FAO. 1992. Manual of Food Quality Control 4. Rev. 1. Microbiological Analysis, Food and Agriculture Organization, Rome Italy.

Galal El, Din IM. 2005. Chemical and Microbiological Evaluation of Effluent Water from Soba Wastewater Treatment Plant and its Suitability For Irrigation of Tomato and Onion. Ph.D. Thesis, Faculty of Agriculture. University of Khartoum.

Gomez K, Gomez AA. 1984. Statistical Procedures for Agricultural Research. John Wiley and Sons, New York USA.

Harrigan WF, McCance ME. 1966. Laboratory Methods in Microbiology, Academic Press, London and New York.

Harrigan WF, McCance ME. 1976. Laboratory Methods in Microbiology P. 257-303 Academic Press, London and New York.

Harrigan WF. 1998. Laboratory Methods in Microbiology. Academic Press, London and New York.

Mohammed AA. 2012. Microbiological and Physico-Chemical Evaluation of the Drinking Water Supply Systems of  Elobeid City, Sudan. PhD Thesis, Faculty of Agriculture University  of Khartoum.

Rippka R, Deruelles J, Waterbury J, Herdman M, Stanier R. 1979. Generc assignments, strain histories and properties of pure cultures of Cyanobacteria. J. Gen. Microbiol111, 1-61.doi: 10.1099/00221287-111-1-1.

WHO. 1984. Guidelines for Drinking Water Quality(2), Health Criteria and Other Supporting Information, World Health Organization Geneva.