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Characterization of Wastewater in school Environments for an Ecological Treatment solution: A Case study of Ndiebene Gandiol 1 school

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Journal of Water Resource and Protection 2024年第1期16卷 27-40页

作者： Falilou Coundoul abdou Khafor Ndiaye abdoulaye Deme Polytechnic Institute of saint-Louis Gaston Berger University Saint-Louis Sénégal Applied sciences and Technologies Training and Research Unit Gaston Berger University Saint-Louis Sénégal

The study conducted at Ndiebene Gandiol 1 school in senegal has unveiled serious environmental and public health challenges. The wastewater analysis revealed high levels of Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), and fecal coliforms, signaling potential risks to the well-being of students and staff. This situation mirrors a wider issue in rural educational settings, where inadequate sanitation persists. Intensive wastewater treatment options are known for their effectiveness against high pollutant loads but are resource-intensive in both energy and cost. Conversely, extensive treatment systems, while requiring more land, provide a sustainable alternative by harnessing natural processes for pollutant removal. The research suggests a hybrid treatment approach could serve the school’s needs, balancing the robust capabilities of intensive methods with the ecological benefits of extensive systems. such a solution would need to be tailored to the specific environmental, financial, and logistical context of the school, based on comprehensive feasibility studies and stakeholder engagement. This study’s findings underscore the urgency of addressing sanitation in schools, as it is intrinsically linked to the health and academic success of students. Quick, effective, and long-term strategies are vital to secure a healthier and more prosperous future for the youth. With proper implementation, the school can transform its sanitation facilities, setting a precedent for rural educational institutions in senegal and similar contexts globally.

关键词： Wastewater Characterization Ecological Treatment school sanitation Phytoremediation Rural Infrastructure Environmental Health

Ecological Wastewater Treatment system in a school Environment Using a Horizontal Flow Biological Reactor: The Case of Typha

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Journal of Environmental Protection 2024年第1期15卷 1-12页

作者： Falilou Coundoul abdou Khafor Ndiaye abdoulaye Deme Institut Polytechnique de saint-Louis (IPsL) Universit&eacute Gaston Berger de Saint-Louis Saint-Louis S&eacuten&eacutegal UFR de sciences Appliqué es et de Technologie Universit&eacute Gaston Berger de Saint-Louis Saint-Louis S&eacuten&eacutegal

The overarching goal of this study is to offer an effective and sustainable solution to the challenges of sanitation in rural and school settings in the northern region of senegal. The study explores a wastewater treatment approach based on phytoremediation, with a particular focus on the use of horizontally-flowing reed bed filters. Furthermore, it aims to adapt and optimize these systems for the specific needs of senegal, focusing on wastewater in school environments. Thus, we constructed a horizontally-flowing reed bed filter, planted with Typha, at the Ndiébène Gandiol school in senegal. We will investigate the efficiency of wastewater treatment by this horizontally-flowing reed bed filter, emphasizing the role of the plant used: Typha. The filter is described in detail, specifying its dimensions, its composition of flint gravel, and the choice of plants, namely Typha. The experimental protocol is detailed, describing the sampling at the entrance and exit of the filter to evaluate water quality. The parameters analyzed include Chemical Oxygen Demand (COD), Biochemical Oxygen Demand over 5 days (BOD5), suspended solids, ammonium, nitrates, phosphates, pH, conductivity, and fecal coliforms. The results indicate a significant improvement in water quality after treatment. COD, BOD5, suspended solids, and fecal coliforms are greatly reduced, thus demonstrating the efficacy of the Typha filter. However, nitrate concentrations remain relatively stable, suggesting room for improvement in their elimination. A perspective of reuse of the treated water is considered, showing that the effluents from the planted filter meet senegalese and international standards for irrigation. The findings suggest that these waters could be used for a variety of crops, thereby reducing the pressure on freshwater resources. In conclusion, the Typha-based filtration system shows promising results for improving water quality in this region of senegal. However, adjustments are necessary for mor

关键词： Hydraulic Engineering Wastewater Quality Wastewater Treatment Agricultural Irrigation sanitation Engineering Environment

Ecological Wastewater Treatment system Using a Horizontal Flow Biological Reactor: The Case of Vetiver

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Journal of Environmental Protection 2024年第1期15卷 26-38页

作者： Falilou Coundoul abdou Khafor Ndiaye abdoulaye Deme Polytechnic Institute of saint-Louis Gaston Berger University Saint-Louis S&eacuten&eacutegal Applied sciences and Technologies Training and Research Unit Gaston Berger University Saint-Louis Saint-Louis S&eacuten&eacutegal

Confronted with the challenge of wastewater management, particularly in the school environment of senegal, our study set out to achieve multiple objectives. Following field surveys, laboratory analyses of wastewater samples were carried out, revealing a significant pollutant load. In the community of Gandiol, near saint-Louis (senegal), the school of Ndiebene Gandiol 1 faces significant sanitation challenges. Our study aimed to address this issue by using a constructed filter composed of two filtering bed cells measuring 12 × 8.5 m, preceded by a septic tank. We particularly focused on the influence of Vetiver;a plant chosen for its purification potential. Our analyses showed remarkable efficiency of the filter. elimination rates reached 95% for 5-Day Biochemical Oxygen Demand (BOD5), 91% for Chemical Oxygen Demand (COD), and 92% for ss, far exceeding the senegalese standards set at 50 mg/L, 200 mg/L, and 40 mg/L, respectively. Furthermore, the concentration of fecal coliforms was reduced to 176 FCU/100mL, well below the senegalese threshold of 2000 FCU/100mL and close to the World Health Organization’s (WHO) recommendation of 1000 FCU/100mL. However, despite these promising results, some parameters, particularly the concentration of certain pollutants, approached the thresholds defined by European legislation. For example, for suspended solids (ss), the post-treatment level of 3 mg/L was well below the senegalese standard but edged close to the European minimum of 10 mg/L. In conclusion, the Vetiver filter demonstrated a remarkable ability to treat school wastewater, offering high pollutant elimination percentages. These results suggest significant opportunities for the reuse of treated water, potentially in areas such as irrigation, though some adjustments may be necessary to meet the strictest standards such as those of the European union (EU).

关键词： Hydraulic Engineering Wastewater Quality Wastewater Treatment Agricultural Irrigation sanitation Engineering Environment

A Comparative Analysis of Vetiver and Typha in Ecological Wastewater Treatment Using a Horizontal Flow Constructed Wetlands in Rural setting

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Journal of Agricultural Chemistry and Environment 2024年第1期13卷 67-82页

作者： Falilou Coundoul abdou Khafor Ndiaye abdoulaye Deme Antonina Torrens Armegnol Polytechnic Institute of saint-Louis (IPsL) Gaston Berger University Saint-Louis Senegal UFR of Applied sciences and Technology Gaston Berger University Saint-Louis Senegal Department of Biology Healthcare and Environment Faculty of Pharmacy and Food Sciences University of Barcelona Barcelona Spain

This study presents an assessment of wastewater ecological treatment processes utilizing a horizontal flow bio-reactor at the Ndiebene Gandiol 1 school. It primarily aims to juxtapose the filtration efficacy of two distinct vegetative cells, Vetiver and Typha, in the pursuit of sustainable wastewater management strategies for rural scholastic institutions. A synergistic approach was employed, integrating on-site surveys for site-specific insights and laboratory analyses to quantify the pollutant loads pre- and post-treatment. Our findings indicate that both Vetiver and Typha-infused filter beds significantly reduce most contaminants, with particular success in diminishing chemical oxygen demand (COD) and biological oxygen demand (BOD5). Vetiver was notable for its superior reduction of COD, achieving an average effluent concentration of 74 mg/L, in contrast to Typha’s 155 mg/L. Conversely, Typha excelled in suspended solids removal, registering 1 mg/L against Vetiver’s 3 mg/L. While both systems notably surpassed the target metrics across several indicators, including fecal coliform reduction, our results pinpoint the need for refinement in phosphate remediation. Conclusively, the study underscores the efficacy of both Vetiver and Typha systems in rural wastewater treatment contexts, with their integrative application potentially paving the way for enhanced system robustness and efficiency. The outcomes herein highlight the imperative for continued research to further hone these ecological treatment modalities, especially concerning phosphate elimination.

关键词： Hydraulics Water Treatment Agricultural Irrigation sanitation Engineering Environment

Interest of Cardiac Rehabilitation in Patients with Heart Disease in a Cardiology Department in senegal

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World Journal of Cardiovascular Diseases 2024年第4期14卷 217-227页

作者： Awa Ba-Diop abdou Khadir sow Rim Mohamed Khaled Mor Diaw Mame saloum Coly Fulgence abdou Faye Amadou Ndiadé Bamba Gaye abdoulaye Ba abdoulaye samb Laboratory of Physiology and Functional Explorations Department of Medicine Alioune Diop University of Bambey Bambey Senegal IRL3189 Environment Health Societies CNRS-UCAD Dakar Senegal The African Research Network Noncommunicable Diseases Dakar Senegal Laboratory of Physiology and Functional Explorations FMPOS UCAD Dakar Senegal Laboratory of Physiology and Functional Explorations UFR Sant&#233 UAS of Thi&#232s Thi&#232s Senegal INsERM U970 Team 4 Paris France

Cardiac rehabilitation helps improve the prognosis and quality of life for patients with heart disease. To show its interest in the African context, in the management of heart disease, a prospective study was carried out. Its objective was to evaluate the effects of physical rehabilitation on cardiac function. Methods: Patients were evaluated at the beginning and at the end of cardiovascular rehabilitation by cardiovascular, biological, and echocardiographic parameters including the size of the heart chambers, the kinetics of the walls, and the systolic function of the ventricles. Results: The study involved 12 patients, 67% of whom were men. After cardiac rehabilitation, the mean hemodynamic constants had not been significantly modified. However, a significant decrease in Total-Cholesterol, LDL-Cholesterol and triglyceride levels was noted. Mean fasting blood sugar decreased from 1.25 ± 0.48 g/L to 0.92 ± 0.18 g/L and glycated hemoglobin from 7.72% ± 0.01% to 6.45% ± 0.008%. The echocardiographic parameters studied showed an improvement in the dilation of the heart chambers in 8.33% of the patients, the normalization of the ejection fraction of the left ventricle in 16% patients, the improvement of the kinetic disorders in 16% of patients and recovery of right ventricular systolic function in all patients. Conclusion: Cardiac rehabilitation as a secondary preventive measure for cardiovascular disease has contributed significantly to improving the clinico-biological parameters of the disease.

关键词： Cardiac Rehabilitation Heart Disease Cardiovascular Disease

Performance of a Horizontal Flow Constructed Reed Bed Filter for Municipal Wastewater Treatment: The Case study of the Prototype Installed at Gaston Berger University, saint-Louis, senegal

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Natural Resources 2024年第1期15卷 1-16页

作者： abdou Khafor Ndiaye Falilou Coundoul abdoulaye Deme Antonina Torrens Armengol abdoulaye senghor UFR of Applied sciences and Technology Gaston Berger University of Senegal Saint-Louis Senegal Polytechnic Institute of saint-Louis (IPsL) Gaston Berger University of Saint-Louis Saint-Louis Senegal Department of Biology Healthcare and Environment Faculty of Pharmacy and Food Sciences University of Barcelona Barcelona Spain sanitation Department Ministry in Charge of Sanitation Dakar Senegal

In saint-Louis, senegal, a constructed wetland with horizontal flow reed beds (FHa and FHb) has demonstrated significant efficacy in treating municipal wastewater. Analyzing various treatment stages, the system showed only a slight temperature variation, from an influent average of 26.3°C to an effluent of 24.7°C. electrical conductivity decreased from 1331 ms/cm to 974.5 ms/cm post-primary treatment, with suspended solids (ss) dramatically reduced from 718.9 mg/L to 5.7 mg/L in the final effluent. Biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) saw a notable decrease, from initial levels of 655.6 mg/L and 1240 mg/L to 2.3 mg/L and 71.3 mg/L, respectively. Nitrogenous compounds (N-TN) and phosphates () also decreased significantly, indicating the system’s nutrient removal capacity. Microbiological analysis revealed a reduction in fecal coliforms from 7.5 Ulog/100ml to 1.8 Ulog/100ml and a complete elimination of helminth eggs. The presence of Phragmites and Typha was instrumental in enhancing these reductions. The system’s compliance with the senegalese standards for disposal into natural environments, WHO recommendations for unrestricted water reuse in irrigation, and the European legislation for water reuse was established. The effluent quality met the stringent criteria for various classes of agricultural reuse, illustrating the system’s potential for sustainable water management. This wetland model presents a robust solution for water-stressed regions, ensuring environmental protection while supporting agricultural needs. The study calls for ongoing research to further refine the system for optimal, reliable wastewater treatment and water resource sustainability.

关键词： Constructed Wetlands Horizontal Flow Reed Beds Wastewater Treatment Phragmites and Typha Plants Physicochemical Pollutant Removal Microbiological Indicators Fecal Coliforms and Helminth Eggs Water Quality Improvement senegal Water Reuse standards sustainable Water Management Agricultural Irrigation Reuse Nutrient Removal Efficiency Environmental Engineering Ecological sanitation systems

Performance Evaluation of Two series Vertical Flow Filters for Wastewater Treatment: A Case study of the Prototype Installed at Gaston Berger University, saint-Louis, senegal

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Open Journal of Modern Hydrology 2024年第1期14卷 14-32页

作者： abdou Khafor Ndiaye Falilou Coundoul abdoulaye Deme Antonina Torrens Armengol abdoulaye senghor UFR of Applied sciences and Technology Gaston Berger University of Senegal Saint-Louis Senegal Polytechnic Institute of saint-Louis (IPsL) Gaston Berger University of Saint-Louis Saint-Louis Senegal UFR of Applied sciences and Technology Gaston Berger University Saint-Louis Senegal Department of Biology Healthcare and Environment Faculty of Pharmacy and Food Sciences University of Barcelona Barcelona Spain sanitation Department Ministry in Charge of Sanitation of Senegal Dakar Senegal

This paper evaluates the efficacy of two sequential vertical flow filters (VFF), FV1 and FV2, implanted with Typha, in a pilot-scale wastewater treatment system. FV1 comprises three cells (FV1a, FV1b, and FV1c), while FV2 consists of two cells (FV2a and FV2b), each designed to reduce various physicochemical and microbiological pollutants from wastewater. Quantitative analyses show significant reductions in electrical conductivity (from 1331 to 1061 μs/cm), biochemical oxygen demand (BOD5 from 655.6 to 2.3 mg/L), chemical oxygen demand (COD from 1240 to 82.2 mg/L), total nitrogen (from 188 to 37.3 mg/L), and phosphates (from 70.9 to 14.6 mg/L). Notably, FV2 outperforms FV1, particularly in decreasing dissolved salts and BOD5 to remarkably low levels. Microbiological assessments reveal a substantial reduction in fecal coliforms, from an initial concentration of 7.5 log CFU/100mL to 3.7 log CFU/100mL, and a complete elimination of helminth eggs, achieving a 100% reduction rate in FV2. The study highlights the impact of design parameters, such as filter material, media depth, and plant species selection, on treatment outcomes. The findings suggest that the judicious choice of these components is critical for optimizing pollutant removal. For instance, different filtration materials show varying efficacies, with silex plus river gravel in FV1c achieving superior pollutant reduction rates. In conclusion, VFFs emerge as a promising solution for wastewater treatment, underscoring the importance of design optimization to enhance system efficiency. Continuous monitoring and adaptation of treatment practices are imperative to ensure water quality, allowing for safe environmental discharge or water reuse. The research advocates for ongoing improvements in wastewater treatment technologies, considering the environmental challenges of the current era. The study concludes with a call for further research to maximize the effectiveness of VFFs in water management.

关键词： Phytoremediation Phytopurification Plant-Based Purifier Wastewater Treat-ment Vertical Flow Filters Pollutant Reduction Typha Physicochemical Analysis Microbial Removal

Primary Non-Hodgkin’s Malignant Lymphoma of the Uterus at the Reference Hospital of Maradi/Niger: A Case Report

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Open Journal of Blood Diseases 2024年第2期14卷 43-46页

作者： Moustapha elhadji-Chefou Badé Malam-abdou Amadou Djibrilla-Almoustapha Maman Brah Moustapha Oumou Kimso Ibrahim Timi Liman elhadji Ali Issa abdou Amadou Borges Moreno Yuribet Facult des sciences de la sant Universit Dan Dicko Dankoulodo de Maradi Maradi Niger Hopital de Reference de Maradi Maradi Niger Facult des sciences de la sant Universit Abdou Moumouni de Niamey Niamey Niger Facult des sciences de la sant Universit Andr Salifou de Zinder Zinder Niger

Malignant non-Hodgkins lymphoma (MHNL) of the uterus is uncommon. We report a case diagnosed on the basis of histologic and immunohistochemical studies of a hysterectomy specimen induced by a very painful pelvic mass in a 50-year-old patient with no previous history of the disease. It was classified as Ann Arbor IV Bb after imaging, given the medullary infiltration and signs of clinical and biological evolutivity: the patient had received two courses of chemotherapy, CHOP protocol. she died 23 days after the second treatment due to a hypertensive crisis.

关键词： Malignant Non-Hodgkin’s Lymphoma Uterus Referral Hospital Maradi/Niger

sickle Cell Disease in the Zinder Region in 2023: Prevalence and sociodemographic Factors

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Open Journal of Blood Diseases 2024年第1期14卷 1-7页

作者： Brah Moustapha Maman Amadou Djibrilla-Almoustapha Moustapha elhadji-Chefou Illa Hamidine Moussa Diongolé Hassane Badé Malam-abdou Department of Medicine Université André Salifou de Zinder Zinder Niger Department of Medicine H&#244pital National de Zinder Zinder Niger Department of Medicine Université Abdou Moumouni de Niamey Niamey Niger Department of Medicine Université Dan Dicko Dan Koulodo de Maradi Maradi Niger

Introduction: In view of the number of sickle cell patients and due to a low production of descriptive studies, we decided to determine the prevalence of genes s and C of the disease in the Zinder region. The objective was to contribute to improving the management of sickle cell disease in Zinder. Methodology: This was a systematic screening by the “sickle scan” test of any blood donor admitted to the Zinder Regional Blood Transfusion Center during the 6-month study period, from January to June 2023. The sickle scan is a qualitative lateral flow chromatography immunoassay using whole blood samples that aid in the rapid diagnosis of sickle cell disease. Results: The study was carried out on 613 samples during the period concerned. The frequency of sickle cell genes was 26.9% (n = 165) in all samples collected, with 23.1% (n = 142) and 3.8% (n = 23) for the s gene and the C gene, respectively. The 18 - 30 age group was the most represented with 64.4% (n = 395) cases. The median age of blood donors was 26 years ± 10 years (min = 18 years/max = 60 years). The sex ratio was 2.5. Donors of Nigerien nationality accounted for 84.1% (n = 516). There is a predominance of blood donors with an average monthly income between 34,000 and 70,000 CFA francs in 44.3% (n = 272), lived in permanent housing with drinking water supply. sickle cell trait (sMA) was found in 22.5% (n = 138). Conclusion: The analysis of these results highlights a high frequency of the s gene for sickle cell disease. The population with an average monthly income is the most affected, with a male predominance.

关键词： sickle Cell Anemia Blood Donors sickle scan