University Professor of Ecology and Zoology Holder of a Doctorate of State es Sciences Very active in the field of parasitology and wastewater pollution Master Training Director Has trained several PhD
Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-... more Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-lying continental lake in Morocco. The objective of this work is to assess the physicochemical quality of the lake in low water period. Six samples, noted from S1 to S6, were taken all around the lake from the banks. The physicochemical analysis of the water was carried out in November 2019. The temperature, pH, dissolved oxygen and electrical conductivity were measured in situ. The chemical composition was determined in the laboratory. The obtained results show that the pH of water is basic. The concentration of dissolved oxygen, nitrates and sulfate shows that the water is of good quality according to Moroccan surface water guidelines. The chemical composition is characterized by a dominance of chlorides and sodium. The chloride concentration is high. The value of the electrical conductivity (4 to 5 mmhos / cm) and of the total concentration of dissolved salts analyzed shows that the salinity of the water (> 2500 mg / l) is high. Water is therefore classified as brackish. This high mineralization is explained by the dissolution of the evaporitic rocks of the region.
The development of urban wastewater treatment plants has been accompanied by the production of la... more The development of urban wastewater treatment plants has been accompanied by the production of large quantities of residual sludge. In general, this sludge is spread in digested form after their anaerobic digestion or in dehydrated form in the pasty state without going through the digester. The dehydrated sludge retains its assets and allows the best agronomic recovery, by spreading on agricultural land. In fact, they can simultaneously supply the soil with organic, nitrogenous, phosphate and trace elements that can be assimilated fairly quickly. The use of sludge from the Tamuda Bay WWTP in agriculture is therefore desirable because it is a good soil conditioner. Their value as a fertilizer depends mainly on the essential elements for plants (N, P, Ca, organic matter …) they contain. Their trace elements (Zn, Cu, Mn, Co, Fe …) are also necessary for plant production without however exceeding the tolerance threshold. The experimental study of the residual sludge from the M’diq treatment plant allowed us to assess their fertilizing potential and their degree of pollution. We observed the absence of their pollution by heavy metals. Thus, their valorization in agriculture gives for 100 g of dehydrated sludge 40.8% Calcium and 25.08% Iron. Likewise, spreading sludge allows farmers to reduce their fertilizer expenses because they play the same role and their spreading costs are lower. In fact, farmers are generally only responsible for transport and spreading costs. In practice, in order to promote the agricultural use of sludge, spreading is often carried out by local authorities or is accompanied by a financial contribution from the municipalities
The domestic wastewaters of the city of Kenitra (North-East of Morocco) are rejected without prel... more The domestic wastewaters of the city of Kenitra (North-East of Morocco) are rejected without preliminary processing by six emissaries into the Sebou river, the Atlantic Ocean and the Fouarate lake. The present study is based on a qualitative and quantitative analysis of the wastewater parasites load of the "Ville Haute" urban district of Maamora (Kenitra, Morocco). Untreated wastewater samples taken at the exit of the urban emissary are pretreated and analysed by the modified Bailenger method at the parasitological and hydrobiological laboratory of the Sciences Faculty of Kenitra (Ibn Tofail University). For diagnostic confirmation purposes, other complementary analysis were made at the parasitological laboratory of the National Institute of Hygiene (Rabat) The results obtained pointed to the existence of the helminths parasites eggs of Ascaris spp., Toxocara spp., Trichuris spp., Hymenolepis spp., Taenia spp and Fasciola hepatica species with respective concentrations of 3 eggs/L, 17 eggs/L, 7 eggs/L, 2 eggs/L, 1 eggs/L and 1 egg/L. The mean concentration is about 31 eggs/L of untreated wastewater. Furthermore, on the samples examined, the percentages of positives tests is 86% for nematodes, 10% for cestodes, and 4% for trematodes. At the end of this preliminary study we insist on the very high level of parasitic helminths transported by untreated wastewater and we recommend that those wastewater be processed before there are recycled in the Sebou river.
On the Atlantic Moroccan coast, two species of pleuronectiform fish coexist, wedge sole (Citharus... more On the Atlantic Moroccan coast, two species of pleuronectiform fish coexist, wedge sole (Citharus linguatula) a temperate species, and spotted flounder (Dicohgoglossa cuneata) a tropical one. These two species are the definitive host for Bothriocephalus andresi and Acanthocephaloïdes propinquus, respectively. A negative binomial fits the dispersion of B. andresi in the population of C. linguatula. The fish become parasitized between their first and third year, while still immature, with the highest abundances in the third year. After the fish become ichthyopagous, the level of infection drops drastically. We postulate that copepods are the sole source of infection. The presence of B. andresi in both Atlantic and Mediterranean populations of C. linguatula shows that the parasite follows the host during its migration along the Mediterranean coasts.The prevalence of A. propinquus remains above 50% as a consequence of the large numbers of amphipods included in the diet of D. cuneata, regardless of the age of the fish or the season. The amphipods, Phtisica marina and Pariambus typicus are an important food and represent potential intermediate hosts for A. propinquus. The population dynamics of A. propinquus on the Atlantic Moroccan coasts are similar to those observed in parasite populations of Gobius niger in the Gulf of Lion (French Mediterranean). The observation of B. andresi and A. propinquus in both Moroccan Atlantic and Mediterranean fishes highlights the problem of the evolution of these parasite populations during the colonization of the Mediterranean by the hosts.
Cahiers d'études et de recherches francophones / Santé, Oct 1, 2003
Les eaux usees domestiques de la ville de Kenitra (nord‐ouest du Maroc) sont rejetees sans traite... more Les eaux usees domestiques de la ville de Kenitra (nord‐ouest du Maroc) sont rejetees sans traitement prealable par l‘intermediaire de six collecteurs dans l‘oued Sebou, l‘Ocean Atlantique et le lac Fouarate. La presente etude a porte sur une analyse qualitative et quantitative de la charge en parasites des eaux usees brutes d‘un emissaire drainant les rejets du quartier « la Ville Haute » de la commune urbaine la Mâamora (Kenitra, Maroc). Les echantillons d‘eaux usees preleves a la sortie de l‘effluent urbain sont pretraites et analyses par la methode de Bailenger au Laboratoire d‘hydrobiologie et de parasitologie de la faculte des sciences de Kenitra (universite Ibn Tofail). Pour des raisons de confirmation du diagnostic, des analyses complementaires ont ete aussi realisees au Laboratoire de parasitologie de l‘Institut national d‘hygiene de Rabat. Les resultats obtenus ont mis en evidence des parasites sous formes d‘œufs d‘helminthes appartenant aux especes Trichuris spp., Ascaris spp., Toxocara spp., Hymenolepis spp., Taenia spp. et Fasciola hepatica avec des concentrations respectives de 3 œufs\L, 17 œufs\L, 7 œufs\L, 2 œufs\L, 1 œuf\L et 1 œufs\L dans les eaux usees brutes. La concentration moyenne est de 31 œufs\L d‘eaux usees brutes. En outre, sur les echantillons examines, les pourcentages de tests positifs sont de 86 % pour les nematodes, 10 % pour les cestodes et 4 % pour les trematodes. Au terme de cette etude preliminaire, nous insistons sur l‘importance de la charge en œufs d‘helminthes parasites vehicules par les eaux usees brutes et nous recommandons vivement le traitement de ces eaux prealablement a leur recyclage dans l‘oued Sebou.
Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-... more Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-lying continental lake in Morocco. The objective of this work is to assess the physicochemical quality of the lake in low water period. Six samples, noted from S1 to S6, were taken all around the lake from the banks. The physicochemical analysis of the water was carried out in November 2019. The temperature, pH, dissolved oxygen and electrical conductivity were measured in situ. The chemical composition was determined in the laboratory. The obtained results show that the pH of water is basic. The concentration of dissolved oxygen, nitrates and sulfate shows that the water is of good quality according to Moroccan surface water guidelines. The chemical composition is characterized by a dominance of chlorides and sodium. The chloride concentration is high. The value of the electrical conductivity (4 to 5 mmhos / cm) and of the total concentration of dissolved salts analyzed shows that the salinity of the water (> 2500 mg / l) is high. Water is therefore classified as brackish. This high mineralization is explained by the dissolution of the evaporitic rocks of the region.
The development of urban wastewater treatment plants has been accompanied by the production of la... more The development of urban wastewater treatment plants has been accompanied by the production of large quantities of residual sludge. In general, this sludge is spread in digested form after their anaerobic digestion or in dehydrated form in the pasty state without going through the digester. The dehydrated sludge retains its assets and allows the best agronomic recovery, by spreading on agricultural land. In fact, they can simultaneously supply the soil with organic, nitrogenous, phosphate and trace elements that can be assimilated fairly quickly. The use of sludge from the Tamuda Bay WWTP in agriculture is therefore desirable because it is a good soil conditioner. Their value as a fertilizer depends mainly on the essential elements for plants (N, P, Ca, organic matter …) they contain. Their trace elements (Zn, Cu, Mn, Co, Fe …) are also necessary for plant production without however exceeding the tolerance threshold. The experimental study of the residual sludge from the M’diq treatment plant allowed us to assess their fertilizing potential and their degree of pollution. We observed the absence of their pollution by heavy metals. Thus, their valorization in agriculture gives for 100 g of dehydrated sludge 40.8% Calcium and 25.08% Iron. Likewise, spreading sludge allows farmers to reduce their fertilizer expenses because they play the same role and their spreading costs are lower. In fact, farmers are generally only responsible for transport and spreading costs. In practice, in order to promote the agricultural use of sludge, spreading is often carried out by local authorities or is accompanied by a financial contribution from the municipalities
The domestic wastewaters of the city of Kenitra (North-East of Morocco) are rejected without prel... more The domestic wastewaters of the city of Kenitra (North-East of Morocco) are rejected without preliminary processing by six emissaries into the Sebou river, the Atlantic Ocean and the Fouarate lake. The present study is based on a qualitative and quantitative analysis of the wastewater parasites load of the "Ville Haute" urban district of Maamora (Kenitra, Morocco). Untreated wastewater samples taken at the exit of the urban emissary are pretreated and analysed by the modified Bailenger method at the parasitological and hydrobiological laboratory of the Sciences Faculty of Kenitra (Ibn Tofail University). For diagnostic confirmation purposes, other complementary analysis were made at the parasitological laboratory of the National Institute of Hygiene (Rabat) The results obtained pointed to the existence of the helminths parasites eggs of Ascaris spp., Toxocara spp., Trichuris spp., Hymenolepis spp., Taenia spp and Fasciola hepatica species with respective concentrations of 3 eggs/L, 17 eggs/L, 7 eggs/L, 2 eggs/L, 1 eggs/L and 1 egg/L. The mean concentration is about 31 eggs/L of untreated wastewater. Furthermore, on the samples examined, the percentages of positives tests is 86% for nematodes, 10% for cestodes, and 4% for trematodes. At the end of this preliminary study we insist on the very high level of parasitic helminths transported by untreated wastewater and we recommend that those wastewater be processed before there are recycled in the Sebou river.
On the Atlantic Moroccan coast, two species of pleuronectiform fish coexist, wedge sole (Citharus... more On the Atlantic Moroccan coast, two species of pleuronectiform fish coexist, wedge sole (Citharus linguatula) a temperate species, and spotted flounder (Dicohgoglossa cuneata) a tropical one. These two species are the definitive host for Bothriocephalus andresi and Acanthocephaloïdes propinquus, respectively. A negative binomial fits the dispersion of B. andresi in the population of C. linguatula. The fish become parasitized between their first and third year, while still immature, with the highest abundances in the third year. After the fish become ichthyopagous, the level of infection drops drastically. We postulate that copepods are the sole source of infection. The presence of B. andresi in both Atlantic and Mediterranean populations of C. linguatula shows that the parasite follows the host during its migration along the Mediterranean coasts.The prevalence of A. propinquus remains above 50% as a consequence of the large numbers of amphipods included in the diet of D. cuneata, regardless of the age of the fish or the season. The amphipods, Phtisica marina and Pariambus typicus are an important food and represent potential intermediate hosts for A. propinquus. The population dynamics of A. propinquus on the Atlantic Moroccan coasts are similar to those observed in parasite populations of Gobius niger in the Gulf of Lion (French Mediterranean). The observation of B. andresi and A. propinquus in both Moroccan Atlantic and Mediterranean fishes highlights the problem of the evolution of these parasite populations during the colonization of the Mediterranean by the hosts.
Cahiers d'études et de recherches francophones / Santé, Oct 1, 2003
Les eaux usees domestiques de la ville de Kenitra (nord‐ouest du Maroc) sont rejetees sans traite... more Les eaux usees domestiques de la ville de Kenitra (nord‐ouest du Maroc) sont rejetees sans traitement prealable par l‘intermediaire de six collecteurs dans l‘oued Sebou, l‘Ocean Atlantique et le lac Fouarate. La presente etude a porte sur une analyse qualitative et quantitative de la charge en parasites des eaux usees brutes d‘un emissaire drainant les rejets du quartier « la Ville Haute » de la commune urbaine la Mâamora (Kenitra, Maroc). Les echantillons d‘eaux usees preleves a la sortie de l‘effluent urbain sont pretraites et analyses par la methode de Bailenger au Laboratoire d‘hydrobiologie et de parasitologie de la faculte des sciences de Kenitra (universite Ibn Tofail). Pour des raisons de confirmation du diagnostic, des analyses complementaires ont ete aussi realisees au Laboratoire de parasitologie de l‘Institut national d‘hygiene de Rabat. Les resultats obtenus ont mis en evidence des parasites sous formes d‘œufs d‘helminthes appartenant aux especes Trichuris spp., Ascaris spp., Toxocara spp., Hymenolepis spp., Taenia spp. et Fasciola hepatica avec des concentrations respectives de 3 œufs\L, 17 œufs\L, 7 œufs\L, 2 œufs\L, 1 œuf\L et 1 œufs\L dans les eaux usees brutes. La concentration moyenne est de 31 œufs\L d‘eaux usees brutes. En outre, sur les echantillons examines, les pourcentages de tests positifs sont de 86 % pour les nematodes, 10 % pour les cestodes et 4 % pour les trematodes. Au terme de cette etude preliminaire, nous insistons sur l‘importance de la charge en œufs d‘helminthes parasites vehicules par les eaux usees brutes et nous recommandons vivement le traitement de ces eaux prealablement a leur recyclage dans l‘oued Sebou.
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