The study of corrosion is of paramount importance because of the direct and indirect losses cause... more The study of corrosion is of paramount importance because of the direct and indirect losses caused by this problem. It is a phenomenon that causes the degradation of a material and its alteration due to a physical-chemical or biological interaction with its environment. It affects metallic materials used in many industrial fields such as the automotive. This work proposes to identify the types of materials most commonlyin the automotive manufacturing, their characteristics and the standards associated with their uses. These materials must be aesthetic, dynamic, lightweight and durable. Currently, three materials are mainly used in the automotive industry: Steel, polymers, and aluminum-based alloys. Our choice of material was based on steel, for reasons related to its low of production cost, its superior strength properties than other materials and its high rate of use in the car. We used the multi-criteria methods, in this case the ELECTRE1 method most frequently used in problems of aid to the multi-criteria decision. Among the five steels constituting the vehicle body, this method allowed us to identify the steel most affected by corrosion.
This present study was conducted during the period 2010-2012. The scope of this study was the cha... more This present study was conducted during the period 2010-2012. The scope of this study was the characterization of the biological of surface quality in the Inaouen catchment. Also, we focused on the identification of any existing pollutants into its waters and their origins. For this, we have, on the one hand, the study area bounded to 26 stations for surface water and directed the spatio-temporal monitoring of bacteriological for two years (November 2010-October 2012). The analysis results revealed a spatio-temporal difference between the two sides of Inaouen watershed, following the intervention of natural and anthropogenic factors. Over time, the waters of the Oued Inaouen enrich gradually with fecal contamination tests germs. This state of pollution is greater downstream in the stations that receive more releases. This is most often related to untreated domestic and industrial waters (especially liquid olive mill wastes OMW) discharged into rivers, and agricultural runoff which is a result of fertilizer use especially in summer and autumn. Besides the germs tests of faecal contamination. This pollution effect is greater in downstream stations that receive more releases. In addition to this fact, the climatic conditions of the region are characterized by very low flows wadis in upstream during the summer season.
In the region of Taza, groundwater is a vital resource for the economy of the region. They are th... more In the region of Taza, groundwater is a vital resource for the economy of the region. They are the crucial water resources for drinking water supply of much of the rural population and for irrigation of agricultural land. This work aims to study the physico-chemical and bacteriological quality of groundwater Watershed Oued Larbaâ during the period between April and July of the years 2011, 2012 and 2013. To do this, water samples were taken and different parameters were analyzed on the physico-chemical and bacteriological : electrical conductivity, turbidity , dissolved oxygen , pH, TAC , Na + , K + , Ca 2 + , Mg 2 + , Cl-, SO4 2-, NO3-, NO2-, NH4 + , PO4 3-, the oxidizability in KMnO4-, fecal streptococci, coliforms and fecal coliforms. The results show that the water points studied are considered "unacceptable" for consumers and for irrigation; this could be explained by the presence of pollutants in the groundwater recharge.
The leachate is a source of contamination of surface water and groundwater if not pretreated. Ind... more The leachate is a source of contamination of surface water and groundwater if not pretreated. Indeed, its complex structure and pollutant load makes treatment very difficult to meet the limits required by the standards. The study presented in this work aimed to develop techniques for treatment of leachate. Two techniques were studied. The first involves treatment by electrocoagulation with aluminum electrode, the second is a sand filter with a diameter between 0.44 and 0.55 mm. Initially, we characterized the sample in the rough. Thereafter, we followed the evolution of abatement of chemical oxygen demand (COD) levels, biological oxygen demand (BOD5), suspended solids (TSS). Secondly, we performed a comparative study on the germination of seeds of sorghum and Lucernes by use of leachate unprocessed or processed and at different concentrations. Treatment of leachate by electrocoagulation-filtration significantly reduced the intensity of their color that resulted in a decrease in pollution load of mineral and organic matter, especially in color, BOD5 and COD. This, allowed him to act favorably on the germination of seeds of sorghum and Lucernes. Leachate treated at different concentrations has no effect on the germination of Sorghum and Lucernes. The application of the raw leachate to inhibit germination of the total grain examined.
Journal of materials & environmental science, Oct 1, 2017
Biological wastewater treatment involves the production of large quantities of sludge. The latter... more Biological wastewater treatment involves the production of large quantities of sludge. The latter present a source of pollution for the environment hence the need for their valorisation. This work proposes their valorisation by co-composting with other substrates rich in carbon and nitrogen. The substrates used are organic household waste, poultry droppings and margins. Two types of composts were developed, one with sludge and the other one without sludge, which served as a control. Indeed, the characterization of the sludge taken from the wastewater treatment plant of the Fez city after digestion and cogeneration of other substrates shows that the sludge is black in colour, had a neutral pH, and carry a very high mineral and organic biodegradable charge and these substrates are heavily loaded with chrome. Their composition in other metals (Cu, Pb, Zn, Co, Ni, and Cd) respects the limit values recommended by the French standards. Household waste is rich in organic carbon and nitrogen. Poultry droppings are weakly basic and have average levels of nitrogen, organic carbon and organic matter. The margins are moderately acidic and rich in organic matter. The monitoring of the evolution of the composting process took place by measuring the physicochemical parameters up to the maturation phase obtained after 16 weeks for both types of compost. Maturation tests for both composts were carried out on the germination of watercress and corn by measuring the E4 / E6 ratio. The mature composts thus produced reach the standards quality of a mud and urban compost, respectively NFU 44-095 and NFU 44-051, and do not present any risk of toxicity.
Évaluation de la qualité des cours d'eau de la ville de Taza utilises dans l'irrigation des cultu... more Évaluation de la qualité des cours d'eau de la ville de Taza utilises dans l'irrigation des cultures maraichères, Maroc
The elimination of sewage sludge is one of the current environmental problems; their valorisation... more The elimination of sewage sludge is one of the current environmental problems; their valorisation appears as a matter of organization and optimization of the techniques of their management or elimination can play the role of organic fertilizer because of their richness of organic matter and mineral compounds. This study examines the use of sludge compost elaborated as a fertilizer and compares it with compost without sludge, Manure (traditional input) and bare soil (no input). We studied the impact of these fertilizers on the soil (before and after cultivation), on the parameters of vegetative growth (morphological) and on the parameters of production. The application test was carried out on two crops: radishes and potatoes. The obtained results showed a significant increase in vegetative growth and production levels compared to bare soil (without input) and manure. For the physicochemical characterizations studied of the soil before and after the planting of the culture tested, the results show that the compost has an effect on soil.
L'étude à réaliser sur ce sujet s'inscrit dans le domaine des recherches pratiques visant à décel... more L'étude à réaliser sur ce sujet s'inscrit dans le domaine des recherches pratiques visant à déceler un certains nombres de relations entre les micro-organismes et les divers facteurs ambiants, physiques, chimiques et biologiques dans les milieux en voie de dystrophie et spécialement dans les plans d'eau divers, à niveau constant ou variable et à salinité allant de l'eau saumâtre à l'eau de salinité normale. L'importance de certaines bactéries d'anaérobioses dans l'attaque par corrosion incite à faire un couplage de processus bactériens et physico-chimiques en des sites soumis à des phénomènes d'eutrophisation dans des conditions de développement et l'action de ces micro-organismes. Les mico-organismes jouent un rôle considérable dans la nature en intervenant dans de multiples cycles biologiques. D'importantes dégradations ayant été observées au niveau des ouvrages en acier. Pour ce faire on examine l'intervention des bactéries du cycle du soufre. Au cours de la minéralisation de la biomasse morte, le soufre, comme les éiéments essentiels (carbone, oxygène, azote), se trouve sous différentes formes, soit lié à différents composés organiques, soit libre, sous forme inorganique. En conditions anaérobies, le sulfure est la forme fInale et énertiquement stable du cycle du soufre. Le but de cette étude est de rechercher les variations physico-chimiques des milieux relativement clos dans lesquels ils se développent ainsi que les fluctuations des populations bactériennes productrices d'acide sulfurique qui en résulte. De cette façon, on pourra également apporter une contribution par une approche bactérienne à la compréhension des phénomènes de durabilité des ouvrages immergés dails les zones portuaires.
Houille Blanche-revue Internationale De L Eau, Dec 1, 1998
The roLe of suLjate-reducillg bacteria on the perforative corrosion of soft steel is now one of t... more The roLe of suLjate-reducillg bacteria on the perforative corrosion of soft steel is now one of the principaL areas of research undertaken in the field of microbioLogicaL corrosion FrequentLy, the suLjate-reducing bacteria (SRB) are involved in the perforative corrosion within an anaerobic ellviromnellt, aLthough they might be present in an aerated ellvironmenl within a biofilm as weLI. The influence of the SRB on the corrosion is not the onLy hannfuL effect. However, the growth ofthe bacteria can produce the compound H-J, which is highLy toxic to most living beings. Since HJ is one of the major products of the SRB's metabolism, certain industriaL accidellts can result from their presence. The aim~f this work is to show, by cOLlnting of the SRB, the important contribution of these microorganisms and others, such as iron bacteria and sulfo-bacteria, to the corrosion of soft steeL, and therefore to the damage offixed portuary installations.
The nutrient salts enrichment of estuarine waters causes the phenomenon of eutrophication, one of... more The nutrient salts enrichment of estuarine waters causes the phenomenon of eutrophication, one of the main results of which is the massive proliferation of algae. In order to reduce the negative impacts of the development of this biomass, and in the face of the difficulties of fighting against, researchers have turned their attention to the path of their valorization. This work presents an attempt to valorize green algae by co-composting, mixing them with poultry manure and olive mill wastewaters (OMW). The mature compost is obtained after 100 days. It is odorless, brownish in color, rich in nutrients and has the characteristics of a standardized bio-fertilizer with no phytotoxicity. The application of the produced compost on the germination and the soil improvement showed an improvement of the productivity of the farms.
La population de Taza, estimee a environ 154 496 habitants, produit 18 000 tonnes par jour de dec... more La population de Taza, estimee a environ 154 496 habitants, produit 18 000 tonnes par jour de dechet solide et ceci malgre la faible activite industrielle de cette region. Ces dechets sont essentiellement domestiques (0,85 kg/ jours/ habitant) et sont reachemines vers la decharge publique de Taza. Cette derniere est installee sur une plaine alluviale s’etendant sur une superficie de 4 hectares et n’ayant beneficie, ni d’une etude preliminaire geologique ni hydrogeologique ni d’impact. De plus, le site de la decharge est a 1,2 Km du centre de l'agglomeration et au coeur de l'Oued Larbâa ce qui pourrait generer de serieux problemes de pollution. L’objectif du present travail est l’etude de la qualite des eaux superficielles et souterraines pour evaluer le degre de pollution provenant des lixiviats de la decharge et des cours d’eaux dans lesquels les rejets des eaux usees de la ville sont directement deverses. Les resultats obtenus, sur la base d’analyse des echantillons, ont ...
The availability of groundwater with an acceptable quality has become a difficult challenge in ma... more The availability of groundwater with an acceptable quality has become a difficult challenge in many parts of the world but especially in ours because of the climate severity and pollution (domestic, industrial, agricultural), which weakens and makes them vulnerable to many contamination factors. The main objective of this work is to determine the status of water quality and make a synthesis map of Inaouen groundwater catchment’s based mainly on the study of physico-chemical and bacteriological groundwater parameters. Analyzes were performed on 54 sampling points well distributed in the watershed of Oued Inaouen according to standard methods. The results shown that there is a significant deterioration concerning the concentration of nitrate, chloride and some heavy metals in relation to water quality standards. The results of bacteriological analyzes reveal the existence of organic pollution due to the presence of certain pathogens.
The main objective of this work is to determine the status of the groundwater quality in the wate... more The main objective of this work is to determine the status of the groundwater quality in the watershed of Taza river, based primarily on physico-chemical and bacteriological parameters of groundwater. The Oued Taza is a small mountain river, 13.44 Km long, which drains a watershed of 40.07 km ². The outlet located at an altitude of 420 m corresponds to the confluence with the Oued Iarbaa. The average annual rainfall varies between 352 mm and 719mm while the annual average temperature is 18.1 ° C. Very high concentrations of nitrates, nitrites, heavy metals and bacterial load in some points near urban areas, illustrate the effect of human activities on degradation of water quality. This contamination could have several causes, the most important are related to household and industrial discharges (especially waters) spilled without any treatment in the rivers, and the use of fertilizers in agricultural areas. These results will enrich the database on water quality in the basin, and he...
In order to decrease the environmental harm produced by the agro industries’ wastes’, an investig... more In order to decrease the environmental harm produced by the agro industries’ wastes’, an investigation of the co-composting of olive mill waste (olive mill wastewater (OMW), olive mill sludge (OMS)) and wine by-products (grape marc and winery wastewater) was done. Three aerated windrows of variable compositions were performed; these windrows differ in terms of their initial composition and the liquid used for their humidification; OMW and wastewater winery were used for humidification to replace water for windrow moistening. Moreover, the main physicochemical parameters (temperature, pH, electrical conductivity, and C/N) were monitored to evaluate the co-composting process. The latter lasted around three months. The elaborated composts were characterized by low C/N ratio, and they were rich in fertilizing and nutriment elements and of low heavy metal contents. The humidification of the windrows with OMW showed effectiveness in improving the windrows temperature, reflected by the hig...
The study of corrosion is of paramount importance because of the direct and indirect losses cause... more The study of corrosion is of paramount importance because of the direct and indirect losses caused by this problem. It is a phenomenon that causes the degradation of a material and its alteration due to a physical-chemical or biological interaction with its environment. It affects metallic materials used in many industrial fields such as the automotive. This work proposes to identify the types of materials most commonlyin the automotive manufacturing, their characteristics and the standards associated with their uses. These materials must be aesthetic, dynamic, lightweight and durable. Currently, three materials are mainly used in the automotive industry: Steel, polymers, and aluminum-based alloys. Our choice of material was based on steel, for reasons related to its low of production cost, its superior strength properties than other materials and its high rate of use in the car. We used the multi-criteria methods, in this case the ELECTRE1 method most frequently used in problems of aid to the multi-criteria decision. Among the five steels constituting the vehicle body, this method allowed us to identify the steel most affected by corrosion.
This present study was conducted during the period 2010-2012. The scope of this study was the cha... more This present study was conducted during the period 2010-2012. The scope of this study was the characterization of the biological of surface quality in the Inaouen catchment. Also, we focused on the identification of any existing pollutants into its waters and their origins. For this, we have, on the one hand, the study area bounded to 26 stations for surface water and directed the spatio-temporal monitoring of bacteriological for two years (November 2010-October 2012). The analysis results revealed a spatio-temporal difference between the two sides of Inaouen watershed, following the intervention of natural and anthropogenic factors. Over time, the waters of the Oued Inaouen enrich gradually with fecal contamination tests germs. This state of pollution is greater downstream in the stations that receive more releases. This is most often related to untreated domestic and industrial waters (especially liquid olive mill wastes OMW) discharged into rivers, and agricultural runoff which is a result of fertilizer use especially in summer and autumn. Besides the germs tests of faecal contamination. This pollution effect is greater in downstream stations that receive more releases. In addition to this fact, the climatic conditions of the region are characterized by very low flows wadis in upstream during the summer season.
In the region of Taza, groundwater is a vital resource for the economy of the region. They are th... more In the region of Taza, groundwater is a vital resource for the economy of the region. They are the crucial water resources for drinking water supply of much of the rural population and for irrigation of agricultural land. This work aims to study the physico-chemical and bacteriological quality of groundwater Watershed Oued Larbaâ during the period between April and July of the years 2011, 2012 and 2013. To do this, water samples were taken and different parameters were analyzed on the physico-chemical and bacteriological : electrical conductivity, turbidity , dissolved oxygen , pH, TAC , Na + , K + , Ca 2 + , Mg 2 + , Cl-, SO4 2-, NO3-, NO2-, NH4 + , PO4 3-, the oxidizability in KMnO4-, fecal streptococci, coliforms and fecal coliforms. The results show that the water points studied are considered "unacceptable" for consumers and for irrigation; this could be explained by the presence of pollutants in the groundwater recharge.
The leachate is a source of contamination of surface water and groundwater if not pretreated. Ind... more The leachate is a source of contamination of surface water and groundwater if not pretreated. Indeed, its complex structure and pollutant load makes treatment very difficult to meet the limits required by the standards. The study presented in this work aimed to develop techniques for treatment of leachate. Two techniques were studied. The first involves treatment by electrocoagulation with aluminum electrode, the second is a sand filter with a diameter between 0.44 and 0.55 mm. Initially, we characterized the sample in the rough. Thereafter, we followed the evolution of abatement of chemical oxygen demand (COD) levels, biological oxygen demand (BOD5), suspended solids (TSS). Secondly, we performed a comparative study on the germination of seeds of sorghum and Lucernes by use of leachate unprocessed or processed and at different concentrations. Treatment of leachate by electrocoagulation-filtration significantly reduced the intensity of their color that resulted in a decrease in pollution load of mineral and organic matter, especially in color, BOD5 and COD. This, allowed him to act favorably on the germination of seeds of sorghum and Lucernes. Leachate treated at different concentrations has no effect on the germination of Sorghum and Lucernes. The application of the raw leachate to inhibit germination of the total grain examined.
Journal of materials & environmental science, Oct 1, 2017
Biological wastewater treatment involves the production of large quantities of sludge. The latter... more Biological wastewater treatment involves the production of large quantities of sludge. The latter present a source of pollution for the environment hence the need for their valorisation. This work proposes their valorisation by co-composting with other substrates rich in carbon and nitrogen. The substrates used are organic household waste, poultry droppings and margins. Two types of composts were developed, one with sludge and the other one without sludge, which served as a control. Indeed, the characterization of the sludge taken from the wastewater treatment plant of the Fez city after digestion and cogeneration of other substrates shows that the sludge is black in colour, had a neutral pH, and carry a very high mineral and organic biodegradable charge and these substrates are heavily loaded with chrome. Their composition in other metals (Cu, Pb, Zn, Co, Ni, and Cd) respects the limit values recommended by the French standards. Household waste is rich in organic carbon and nitrogen. Poultry droppings are weakly basic and have average levels of nitrogen, organic carbon and organic matter. The margins are moderately acidic and rich in organic matter. The monitoring of the evolution of the composting process took place by measuring the physicochemical parameters up to the maturation phase obtained after 16 weeks for both types of compost. Maturation tests for both composts were carried out on the germination of watercress and corn by measuring the E4 / E6 ratio. The mature composts thus produced reach the standards quality of a mud and urban compost, respectively NFU 44-095 and NFU 44-051, and do not present any risk of toxicity.
Évaluation de la qualité des cours d'eau de la ville de Taza utilises dans l'irrigation des cultu... more Évaluation de la qualité des cours d'eau de la ville de Taza utilises dans l'irrigation des cultures maraichères, Maroc
The elimination of sewage sludge is one of the current environmental problems; their valorisation... more The elimination of sewage sludge is one of the current environmental problems; their valorisation appears as a matter of organization and optimization of the techniques of their management or elimination can play the role of organic fertilizer because of their richness of organic matter and mineral compounds. This study examines the use of sludge compost elaborated as a fertilizer and compares it with compost without sludge, Manure (traditional input) and bare soil (no input). We studied the impact of these fertilizers on the soil (before and after cultivation), on the parameters of vegetative growth (morphological) and on the parameters of production. The application test was carried out on two crops: radishes and potatoes. The obtained results showed a significant increase in vegetative growth and production levels compared to bare soil (without input) and manure. For the physicochemical characterizations studied of the soil before and after the planting of the culture tested, the results show that the compost has an effect on soil.
L'étude à réaliser sur ce sujet s'inscrit dans le domaine des recherches pratiques visant à décel... more L'étude à réaliser sur ce sujet s'inscrit dans le domaine des recherches pratiques visant à déceler un certains nombres de relations entre les micro-organismes et les divers facteurs ambiants, physiques, chimiques et biologiques dans les milieux en voie de dystrophie et spécialement dans les plans d'eau divers, à niveau constant ou variable et à salinité allant de l'eau saumâtre à l'eau de salinité normale. L'importance de certaines bactéries d'anaérobioses dans l'attaque par corrosion incite à faire un couplage de processus bactériens et physico-chimiques en des sites soumis à des phénomènes d'eutrophisation dans des conditions de développement et l'action de ces micro-organismes. Les mico-organismes jouent un rôle considérable dans la nature en intervenant dans de multiples cycles biologiques. D'importantes dégradations ayant été observées au niveau des ouvrages en acier. Pour ce faire on examine l'intervention des bactéries du cycle du soufre. Au cours de la minéralisation de la biomasse morte, le soufre, comme les éiéments essentiels (carbone, oxygène, azote), se trouve sous différentes formes, soit lié à différents composés organiques, soit libre, sous forme inorganique. En conditions anaérobies, le sulfure est la forme fInale et énertiquement stable du cycle du soufre. Le but de cette étude est de rechercher les variations physico-chimiques des milieux relativement clos dans lesquels ils se développent ainsi que les fluctuations des populations bactériennes productrices d'acide sulfurique qui en résulte. De cette façon, on pourra également apporter une contribution par une approche bactérienne à la compréhension des phénomènes de durabilité des ouvrages immergés dails les zones portuaires.
Houille Blanche-revue Internationale De L Eau, Dec 1, 1998
The roLe of suLjate-reducillg bacteria on the perforative corrosion of soft steel is now one of t... more The roLe of suLjate-reducillg bacteria on the perforative corrosion of soft steel is now one of the principaL areas of research undertaken in the field of microbioLogicaL corrosion FrequentLy, the suLjate-reducing bacteria (SRB) are involved in the perforative corrosion within an anaerobic ellviromnellt, aLthough they might be present in an aerated ellvironmenl within a biofilm as weLI. The influence of the SRB on the corrosion is not the onLy hannfuL effect. However, the growth ofthe bacteria can produce the compound H-J, which is highLy toxic to most living beings. Since HJ is one of the major products of the SRB's metabolism, certain industriaL accidellts can result from their presence. The aim~f this work is to show, by cOLlnting of the SRB, the important contribution of these microorganisms and others, such as iron bacteria and sulfo-bacteria, to the corrosion of soft steeL, and therefore to the damage offixed portuary installations.
The nutrient salts enrichment of estuarine waters causes the phenomenon of eutrophication, one of... more The nutrient salts enrichment of estuarine waters causes the phenomenon of eutrophication, one of the main results of which is the massive proliferation of algae. In order to reduce the negative impacts of the development of this biomass, and in the face of the difficulties of fighting against, researchers have turned their attention to the path of their valorization. This work presents an attempt to valorize green algae by co-composting, mixing them with poultry manure and olive mill wastewaters (OMW). The mature compost is obtained after 100 days. It is odorless, brownish in color, rich in nutrients and has the characteristics of a standardized bio-fertilizer with no phytotoxicity. The application of the produced compost on the germination and the soil improvement showed an improvement of the productivity of the farms.
La population de Taza, estimee a environ 154 496 habitants, produit 18 000 tonnes par jour de dec... more La population de Taza, estimee a environ 154 496 habitants, produit 18 000 tonnes par jour de dechet solide et ceci malgre la faible activite industrielle de cette region. Ces dechets sont essentiellement domestiques (0,85 kg/ jours/ habitant) et sont reachemines vers la decharge publique de Taza. Cette derniere est installee sur une plaine alluviale s’etendant sur une superficie de 4 hectares et n’ayant beneficie, ni d’une etude preliminaire geologique ni hydrogeologique ni d’impact. De plus, le site de la decharge est a 1,2 Km du centre de l'agglomeration et au coeur de l'Oued Larbâa ce qui pourrait generer de serieux problemes de pollution. L’objectif du present travail est l’etude de la qualite des eaux superficielles et souterraines pour evaluer le degre de pollution provenant des lixiviats de la decharge et des cours d’eaux dans lesquels les rejets des eaux usees de la ville sont directement deverses. Les resultats obtenus, sur la base d’analyse des echantillons, ont ...
The availability of groundwater with an acceptable quality has become a difficult challenge in ma... more The availability of groundwater with an acceptable quality has become a difficult challenge in many parts of the world but especially in ours because of the climate severity and pollution (domestic, industrial, agricultural), which weakens and makes them vulnerable to many contamination factors. The main objective of this work is to determine the status of water quality and make a synthesis map of Inaouen groundwater catchment’s based mainly on the study of physico-chemical and bacteriological groundwater parameters. Analyzes were performed on 54 sampling points well distributed in the watershed of Oued Inaouen according to standard methods. The results shown that there is a significant deterioration concerning the concentration of nitrate, chloride and some heavy metals in relation to water quality standards. The results of bacteriological analyzes reveal the existence of organic pollution due to the presence of certain pathogens.
The main objective of this work is to determine the status of the groundwater quality in the wate... more The main objective of this work is to determine the status of the groundwater quality in the watershed of Taza river, based primarily on physico-chemical and bacteriological parameters of groundwater. The Oued Taza is a small mountain river, 13.44 Km long, which drains a watershed of 40.07 km ². The outlet located at an altitude of 420 m corresponds to the confluence with the Oued Iarbaa. The average annual rainfall varies between 352 mm and 719mm while the annual average temperature is 18.1 ° C. Very high concentrations of nitrates, nitrites, heavy metals and bacterial load in some points near urban areas, illustrate the effect of human activities on degradation of water quality. This contamination could have several causes, the most important are related to household and industrial discharges (especially waters) spilled without any treatment in the rivers, and the use of fertilizers in agricultural areas. These results will enrich the database on water quality in the basin, and he...
In order to decrease the environmental harm produced by the agro industries’ wastes’, an investig... more In order to decrease the environmental harm produced by the agro industries’ wastes’, an investigation of the co-composting of olive mill waste (olive mill wastewater (OMW), olive mill sludge (OMS)) and wine by-products (grape marc and winery wastewater) was done. Three aerated windrows of variable compositions were performed; these windrows differ in terms of their initial composition and the liquid used for their humidification; OMW and wastewater winery were used for humidification to replace water for windrow moistening. Moreover, the main physicochemical parameters (temperature, pH, electrical conductivity, and C/N) were monitored to evaluate the co-composting process. The latter lasted around three months. The elaborated composts were characterized by low C/N ratio, and they were rich in fertilizing and nutriment elements and of low heavy metal contents. The humidification of the windrows with OMW showed effectiveness in improving the windrows temperature, reflected by the hig...
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