[ Étude comparative sur la qualité de l’eau produite aux usines de la REGIDESO du centre de Kolwezi à celle distribuée aux abonnés: Cas du quartier Mununka dans la commune de Manika, Ville de Kolwezi, RD Congo ]
Volume 35, Issue 1, December 2021, Pages 153–164
Patrick MBWEB KATSHIL1, Nissi Nansong Yav2, and Jean Luc Kashala3
1 Commissariat Général à l’Energie Atomique, Ministère de la Recherche Scientifique, Lubumbashi, RD Congo
2 Institut Supérieur des Techniques Appliquées ISTA, Kolwezi, RD Congo
3 Commissariat Général à l'Energie Atomique, Ministère de la Recherche Scientifique - Lubumbashi, RD Congo
Original language: French
Copyright © 2021 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Water, a simple molecule which is essential for the life and development of the population. The distribution of this drinking water of good sanitary quality and the maintenance of the quality during its distribution is a permanent concern of REGIDESO (Water Distribution Authority). The quality aspect deserves special attention in terms of microbiological and physicochemical balance.The water from the Regideso; distributed in the town of Kolwezi to part of the population may have a poorer quality at the outlet of the tap compared to that produced in factories because of the dilapidated drinking water distribution network in the town.Thus our study will focus on the knowledge of the microbiological quality (mesophilic aerobic flora, total coliforms, Escherichia coli, salmonella and shigella, faecal streptococcus, clostridium perfringens) and physicochemical (pH, turbidity, residual chlorine, etc.) of the water, flowing from the Regideso tap. To do this, a research method and technique based on experimentation as well as documentation in order to compare the results obtained in the laboratory according to international standards for the quality of water intended for human consumption and carried out by the tests of 'guidelines for evaluating the final quality of water intended for human consumption. After the orientation tests focused on physico-chemical analyzes only. We carried out microbiological analyzes to identify pathogenic germs in the water of the factories as well as at the level of the distribution network for the proper assessment of the quality of the latter. After analysis, we found the following:- The physico-chemical analyzes of the water taken at the outlet of the treatment plants show values below the limits of the standards published in 2011 by the WHO;- A deterioration in the quality of the water caused by the obsolescence (piping pierced in certain places and corrosion of the piping) of the distribution network at certain sampling points; this situation is observed in the MUNUNKA district located in the commune of MANIKA. The degradation influences the turbidity of the water drawn from the taps as well as the reduction in the concentration of the residual chlorine level (i.e. 12.40 NTU against the WHO standard: 0-5 NTU and 0.1 mg / l of Chlorine against the WHO standard: 0.2 - 1mg / l);- And finally, the microbiological analysis shows that there is an absence of all the pathogenic germs sought except in raw water which has an excess of aerobic mesophilic flora (ie 591 CFU / 100ml against the WHO standard: ˂ 100 ml). To maintain good water quality, REGIDESO will need substantial resources to rebuild its distribution network without forgetting the renewal of equipment.
Author Keywords: Degradation, quality, water, network, distribution, center, RÉGIDESO, Kolwezi.
Volume 35, Issue 1, December 2021, Pages 153–164
Patrick MBWEB KATSHIL1, Nissi Nansong Yav2, and Jean Luc Kashala3
1 Commissariat Général à l’Energie Atomique, Ministère de la Recherche Scientifique, Lubumbashi, RD Congo
2 Institut Supérieur des Techniques Appliquées ISTA, Kolwezi, RD Congo
3 Commissariat Général à l'Energie Atomique, Ministère de la Recherche Scientifique - Lubumbashi, RD Congo
Original language: French
Copyright © 2021 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Water, a simple molecule which is essential for the life and development of the population. The distribution of this drinking water of good sanitary quality and the maintenance of the quality during its distribution is a permanent concern of REGIDESO (Water Distribution Authority). The quality aspect deserves special attention in terms of microbiological and physicochemical balance.The water from the Regideso; distributed in the town of Kolwezi to part of the population may have a poorer quality at the outlet of the tap compared to that produced in factories because of the dilapidated drinking water distribution network in the town.Thus our study will focus on the knowledge of the microbiological quality (mesophilic aerobic flora, total coliforms, Escherichia coli, salmonella and shigella, faecal streptococcus, clostridium perfringens) and physicochemical (pH, turbidity, residual chlorine, etc.) of the water, flowing from the Regideso tap. To do this, a research method and technique based on experimentation as well as documentation in order to compare the results obtained in the laboratory according to international standards for the quality of water intended for human consumption and carried out by the tests of 'guidelines for evaluating the final quality of water intended for human consumption. After the orientation tests focused on physico-chemical analyzes only. We carried out microbiological analyzes to identify pathogenic germs in the water of the factories as well as at the level of the distribution network for the proper assessment of the quality of the latter. After analysis, we found the following:- The physico-chemical analyzes of the water taken at the outlet of the treatment plants show values below the limits of the standards published in 2011 by the WHO;- A deterioration in the quality of the water caused by the obsolescence (piping pierced in certain places and corrosion of the piping) of the distribution network at certain sampling points; this situation is observed in the MUNUNKA district located in the commune of MANIKA. The degradation influences the turbidity of the water drawn from the taps as well as the reduction in the concentration of the residual chlorine level (i.e. 12.40 NTU against the WHO standard: 0-5 NTU and 0.1 mg / l of Chlorine against the WHO standard: 0.2 - 1mg / l);- And finally, the microbiological analysis shows that there is an absence of all the pathogenic germs sought except in raw water which has an excess of aerobic mesophilic flora (ie 591 CFU / 100ml against the WHO standard: ˂ 100 ml). To maintain good water quality, REGIDESO will need substantial resources to rebuild its distribution network without forgetting the renewal of equipment.
Author Keywords: Degradation, quality, water, network, distribution, center, RÉGIDESO, Kolwezi.
Abstract: (french)
L’eau, molécule simple qui est indispensable à la vie ainsi qu’au développement de la population. La distribution de cette eau potable de bonne qualité sanitaire et le maintien de la qualité au cours de sa distribution est une préoccupation permanente de la REGIDESO (Régie de Distribution d’Eau). L’aspect qualité mérite une attention particulière en termes d’équilibre microbiologique et physico-chimique.L’eau de la Regideso; distribuée sur la ville de Kolwezi à une partie de la population peut avoir une qualité moins bonne à la sortie du robinet par rapport à celle produite aux usines à cause de la vétusté du réseau de distribution d’eau potable dans la ville.Ainsi notre étude portera sur la connaissance de la qualité microbiologique (flore aérobie mésophile, coliforme totaux, Escherichia coli, salmonella et shigella, streptocoque fécaux, clostridium perfringens) et physico-chimique (pH, turbidité, chlore résiduel…etc.) de l’eau, qui coule au robinet de la Regideso. Pour bien ce faire une méthode et technique de recherche basée sur l’expérimentation ainsi que la documentation en vue de comparer les résultats obtenus au laboratoire suivant les normes internationales en matière de la qualité des eaux destinées à la consommation humaine et procédé par les essais d’orientations en vue d’évaluer la qualité finale de l’eau destinée à la consommation humaine. Après les essais d’orientations focalisées sur les analyses physico-chimiques seulement. Nous avons effectué les analyses microbiologiques pour identifier les germes pathogènes dans les eaux des usines ainsi qu’au niveau du réseau de distribution pour la bonne évaluation de la qualité de cette dernière.Apres analyse, nous avons constaté ce qui suit:Les analyses physico-chimiques des eaux prélevées à la sortie des usines de traitement présentent des valeurs inférieures aux limites des normes éditées en 2011 par l’OMS;Une dégradation de la qualité de l’eau causée par la vétusté (tuyauterie percées à certain endroit et corrosion de la tuyauterie) du réseau de distribution sur certains points de prélèvement; cette situation est observée dans le quartier MUNUNKA situé dans la commune de MANIKA. La dégradation influe sur la turbidité de l’eau puisée aux robinets ainsi qu’à la diminution de la concentration du taux de Chlore résiduel (soit 12,40 NTU contre la norme OMS: 0-5 NTU et 0,1 mg/l de Chlore contre la norme OMS: 0,2 – 1mg/l);Et enfin, les analyse microbiologiques montre qu’il y a absence de tous les germes pathogènes recherchés à part dans les eaux brutes qui présentent un excès des flores aérobies mésophiles (soit 591 UFC/100ml contre la norme OMS: ˂ 100 ml).Pour maintenir la bonne qualité de l’eau, la REGIDESO aura besoin des moyens conséquents pour refaire son réseau de distribution sans oublier le renouvellement des équipements.
Author Keywords: Dégradation, qualité, eau, réseau, distribution, centre, RÉGIDESO, Kolwezi.
How to Cite this Article
Patrick MBWEB KATSHIL, Nissi Nansong Yav, and Jean Luc Kashala, “Comparative study on the quality of the water produced at REGIDESO factories in the center of Kolwezi with that distributed to customers: Case of the Mununka district in the commune of Manika, City of Kolwezi, DR Congo,” International Journal of Innovation and Applied Studies, vol. 35, no. 1, pp. 153–164, December 2021.
