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A Biogas Production Model from the Combination of Pig Manure and Cow Dung in N’Zérékoré City, Republic of Guine

Energy and Power Engineering 2024年第9期16卷 293-312页

作者： Madeleine Kamano Oumar Keita ansoumane sakouvogui Aboubacar Sangare Department of Physics Universit de NZrkor NZrkor Guinea Department of Hydrology Universit de NZrkor NZrkor Guinea Department of Energy Institut Suprieur de Technologie de Mamou Mamou Guinea Department of Environmental Engineering Université de NZérékoré NZérékoré Guinea

This present research work focuses on the valorization of pig droppings for production of biogas in mono digestion and co-digestion with proportions of cow dung from the urban commune of N’Zérékoré. It was carried out in December 2020 in the Physics laboratory of the University of N’Zérékoré. The anaerobic digestion process took 25 days in an almost constant ambient temperature of 25˚C. Five digesters were loaded on 12/06/2020, two of which with 1 kg of pig dung and 1 kg of cow dung both in mono-digestion. The 3 other digesters in co-digestion with different proportions of pig manure and cow dung. The substrate in each digester is diluted in 2 liters of water, with a proportion of (1/2). The main results obtained are: 1) the evolution of the temperature and pH during digestion process, 2) the average biogas productions 0.61 liters for (D1);1.20 liter for (D2);1.65 liter for (D3);1.51 liter for (D4) and 1.31 liter for (D5). The cumulative amounts of biogas are respectively: D1 (7.95 liters), D2 (15.60 liters), D3 (21.50 liters), D4 (19.65 liters) and D5 (17.05 liters). The total cumulative production is 81.75 liters at the end of the process. The originality of this research work is that the proposed model examines the relation between the daily biogas production and the variation of temperature, pH and pressure. The combustibility test showed the biogas produced during the first week was no combustible (contains less than 50% methane). Combustion started from the biogas produced from the 15th day and it is from the 20th day that a significant amount of stable yellow/blue flame was observed. The results of this study show the combination of pig manure and cow dung presents advantages for optimal biogas production.

关键词： Production Experimental Model Pig Manure Cow Dung Biogas N’Zérékoré Republic of Guinea

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Contribution to Computer Waste Management:Knowledge of the Regulatory Framework by Industry Stakeholders in Guinea

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Journal of Environmental Science and Engineering(A) 2024年第5期13卷 156-164页

作者： Fatoumata Sylla ansoumane sakouvogui Saran Camara Mamadou Sanoussy Camara Mamadou Kabirou Bah Alpha Issiaga Diallo Center for Environmental Studies and Research Gamal Abdel Nasser University of ConakryConakryBP 1615Guinea Energy Department Higher Institute of Technology of MamouMamouBP 63Guinea Telecommunication Department Polytechnic InstituteGamal Abdel Nasser University of ConakryConakryBP 1615Guinea

In African countries,regulations on the management of WTE(Waste from Information Technology Equipment)are non-existent or sometimes insufficient,if they *** study shows how to mention waste from information technology equipment in a country that does not have a regulatory legislative framework or organized management channels.A methodological approach based on documentary research and semi-directed interviews was adopted in this *** results showed that 54.55%of institutional managers are unaware of the existence of regulations for the management of WTE,both at the national and international levels;72.72%of these managers do not have a specific implementing text for this management;72.73%of institutions have adopted an acquisition policy based on the needs of workers and 81.82%of institutions store WTE in *** with waste collection SMEs(Small and Midsize Enterprises),especially for IT equipment,are limited for 72.73%of *** terms of improving the capacity to manage WEEE(Waste Electrical and Electronic Equipment),90.91%of institutions do not offer training or awareness ***,no significant indicators are in place to assess WEEE management in institutions,which reflects a lack of commitment and awareness among institutional *** addition,there are no financial means for ecological and sustainable *** 27.27%of managers are aware of the dangers to human health and the environment related to IT equipment,they are often unaware of the harmful consequences of abandoning it in nature.

关键词： Waste IT equipment legal frameworks regulations informal management

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Optimal Sizing of Capacitor Bank for Increasing Substation Capacity of Mamou

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World Journal of Engineering and Technology 2023年第2期11卷 217-233页

作者： Jean Ouèrè Toupouvogui Mohamed ansoumane Camara ansoumane sakouvogui Mamby Keita Department of Instrumentation and Physical Measurements Higher Institute of Technology Mamou Guinea Electrical Engineering Department Polytechnic Institute Gamal Abdel Nasser University Conakry Guinea Energy Department Higher Institute of Technology Mamou Guinea Department of Physics Faculty of Sciences Gamal Abdel Nasser University Conakry Guinea

In order to increase the available power of the electrical energy distribution station and improve the voltage profile of the distribution lines, the use of shunt capacitor banks is indicated. The main results obtained during this study are: a reduction in subscribed power from 14913.978 kVA to 14010.100 kVA, a reduction in the transformer load rate from 99.4% to 93.4%, a reduction in reactive power called from 5481.729 kVAr to 481.729 kVAr, an increase in the active power transported by the substation from 8505.062 kW to 8962.323 kW, a reduction in the voltage drop from 4.8% to 3.9%, an increase in the power available at the secondary of the transformer station at full load from 13950 kW to 14700 kW and an annual electrical energy saving of 339943.48 kWh of electrical energy, therefore fuel savings and a reduction in CO2 and SO2 emissions due to this energy saving will be achieved. The installation of capacitor banks for optimization of reactive energy allowed a reduction in the current called therefore a reduction in the absorbed power: 14153.061 kVA, i.e. a reduction of 903.876 kVA. It is therefore essential that energy players are convinced of the need to install capacitors to reduce or even eliminate their reactive energy bill. This is necessarily accompanied by an investment by Electricité De Guinée by setting up active and reactive energy meters but also by implementing pricing in line with the reduction in the transfer of reactive energy in the network.

关键词： Compensation Power Reactive Optimal Battery Capacitors

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Experimentation of a Forced Convection Solar Dryer for Drying Sweet Potatoes at the Higher Institute of Technology of Mamou-Guinea

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World Journal of Engineering and Technology 2023年第3期11卷 536-548页

作者： ansoumane sakouvogui Thierno Amadou Barry Adama Moussa Sakho Mamby Keita Energy Department Higher Institute of Technology of Mamou Mamou Guinea Department of Chemistry Laboratory Techniques Higher Institute of Technology of Mamou Mamou Guinea Department of Physics Faculty of Sciences Gamal Abdel Nasser University Conakry Guinea

This study was carried out at the Mamou Higher Institute of Technology during the period from March 10 to April 15, 2022, with the aim of designing and testing a solar dryer with forced convection by drying potatoes. The dryer was designed using local materials. Its main geometric parameters are: 1) height of the drying chamber (90 cm), 2) length of the drying chamber (50 cm), 3) width of the drying chamber (43 cm), 4) surface of the racks (0.1806 m2), 5) surface of the heat accumulator (0.2537 m2). The experiment focused on the vacuum test of the dryer for two days and that of the drying of the sweet potato for three days from 8:30 a.m. to 5:30 p.m. The average vacuum test temperature values of the three environments are respectively accumulator (43°C), dryer chamber (41°C) and ambient environment (34°C). Four kilograms (4 kg) of boiled sweet potato were dried. The average temperatures in the accumulator and in the drying chamber during the three days of drying are respectively 33°C and 39°C. The final mass of the dried product is 1.2 kg, with a quantity of water extracted of 2 liters or 63% of the initial mass of the product. The average drying rate is 0.074 kg/h. The drying kinetics showed a decreasing rate in the absence of the heating period and the constant rate period.

关键词： Experimentation Temperature Accumulator Forced Convection Solar Dryer Sweet Potato

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Design and Construction of an Experimental Biodigester in the Senkerfa Poultry Farm in Kankan,Guinea

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Journal of Environmental Science and Engineering(A) 2022年第5期11卷 162-170页

作者： Amadou Sidibe ansoumane sakouvogui Idrissa Diaby Mamby Keita Department of Physics Faculty of Natural SciencesJulius NyéréréUniversity of KankanBP 209Guinea Energy Department Higher Institute of Technology of MamouBP 63Guinea Department of Physics Faculty of SciencesGamal Abdel Nasser University of ConakryBP 1147Guinea

This study is a continuation of our research work on the energy recovery of OM(Organic Matter)and the protection of the *** took place from October 1 to November 25,2021 in the poultry farm of *** Daye KABA in the Senkefra district,urban commune of *** this work,we designed,built and tested a 6 m^(3)*** dung(2,500 kg)with 2,300 L of water served as a substrate for the production of biogas during 30 days of *** following physico-chemical parameters:Temperature(T°C),Humidity(H%),Hydrogen potential(pH),Dry Matter(DM),Organic Matter(OM)and the ratio between Carbon(C)and Nitrogen(N)(C/N)of cow dung were determined,namely:T(28°);H(75%);pH(6.5);MS(15%);MO(55%)and C/N(25%).During the 30 days of digestion,the temperature varied from 27 to 35°C with an average of 30.57°C(mesophilic digestion);the pH varied from 6 to 9,with an average of 7.58;the daily production kinetics represented the four stages of digestion(hydrolysis,acidogenesis,acetogenesis and methanogenesis).The cumulative production of biogas is 198 m^(3).The composition of the biogas produced is 60%CH_(4),36%CO_(2),2%N_(2),2%H_(2)S and 1.5%*** biogas produced was used for lighting,water heating and *** results show that the biogas produced is of good quality and remains consistent with the literature.

关键词： Biodigester biogas design farm cow dung Kankan

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Contribution to the Management of Fecal Sludge in the Urban Commune of Mamou(Republic of Guinea)

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Journal of Environmental Science and Engineering(A) 2023年第6期12卷 223-228页

作者： Thierno Amadou Barry ansoumane sakouvogui Adama Moussa Sakho Mamby Keita Department of Energy Higher Institute of TechnologyMamouBP 63Guinea Department of Chemistry Laboratory Techniques Higher Institute of TechnologyMamouBP 63Guinea Department of Physics Faculty of SciencesGamal Abdel Nasser University ConakryBP 1147Guinea

In the town of Mamou,all homes with sanitation systems are equipped with autonomous installations not connected to a sewer *** emptying service is provided by manual emptiers and by the living environment and sanitation service of the urban municipality which has a single 6 m^(3)*** objective of this work is to determine the quantity of fecal sludge produced within the city for sustainable *** methodology adopted is based on a field survey and the use of three methods for evaluating the quantities of sludge(specific production,quantity of sludge collected by the sludge truck and the total production of sludge produced in the various sludge works).The results obtained show that,out of the 2,940 sanitation works identified,2,936 works have been emptied at least once since their *** 2,307 structures are emptied manually or 78.57%,against;619 structures emptied mechanically or 21.08%.The structures are emptied on average every 3 years for septic tanks and every 5 years for dry *** specific production of sludge is 685,241,532 m^(3)/year;the production of sludge by the mechanical emptying technique varies from 588,641.57 m^(3)/year to 724,800.46 m^(3)/year and the production of sludge by manual emptying is 1,573,709.33 m^(3)/year,for a total quantity of sludge produced including between 2,162,350 m^(3)/year to 685,241,531.9 m^(3)/year.

关键词： Management fecal sludge sanitation specific production Mamou

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Sizing and Simulation of a Hybrid Hydroelectricity and Photovoltaic System with Storage for Supplying the Tamagaly District in Mamou,Guinea

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Journal of Energy and Power Engineering 2023年第3期17卷 69-77页

作者： ansoumane sakouvogui Elhadj Ousmane Camara NènèAïssata Baldeand Mamby Keita Energy Department Mamou Higher Institute of TechnologyMamouBP 63Guinea Polytechnic School of Engineers Kofi Annan University of GuineaRatomaConakryBP 1367Guinea

The present study is a contribution to the study of hybrid electric power conversion systems in rural *** approach adopted uses a methodology for analyzing the complementarity that exists between the two renewable energy potentials(solar and hydraulic)based on their daily,monthly and annual *** different analytical formulas for sizing a PV(photovoltaic)field and a small hydroelectric power station are recalled in this *** HOMER software served as a tool for optimal sizing and simulation of the *** work focuses on the analysis of the behavior and control of the performances of a hybrid system made up of two renewable energy sources,hydroelectricity/PV with a storage system and a *** main results obtained relate to:monitoring of the variation in temperature variation,solar irradiation of the site,as well as the flow of the *** profile of the village’s annual charges is *** annual production of electrical energy is 527.936 kWh/*** hydroelectric plant will provide 155.316 kWh/year,or 29%,and for the PV field(372.620 kWh/year),or 71%.The monthly energy average is 43.995 kWh/*** average daily consumption is 731 kWh/d with a maximum power of 163 *** completion of this project makes it possible to cover all electrical loads in the Tamagaly district,with an annual energy production of 206.783 *** would make it possible to locally limit greenhouse gas emissions in the area.

关键词： Sizing simulation hybrid system PV hydroelectricity.

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Study of the Management and Recovery of Biodegradable Waste in the City of Kankan,Guinea

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Journal of Environmental Science and Engineering(B) 2023年第1期12卷 17-24页

作者： ansoumane sakouvogui Vone Beavogui Wogbo Dominique Guilavogui Amadou Sidibe Mamby Keita Department of Energy Higher Institute of TechnologyMamouBP 63Guinea Department of Physics Faculty of SciencesJulius NyéréréUniversity KankanBP 209Guinea 1 Energy Department Scientific Research Center of Conakry-RogbaneConakryBP 1615Guinea Department of Physics Faculty of SciencesGamal Abdel Nasser University ConakryBP 1147Guinea

This research,carried out during September and October 2020 in the city of Kankan,made it possible to take stock of the city’s household waste *** quantities of waste from the four main landfills in the city are assessed,namely:Sogbè(1350.3 m^(3)),Station(195.5 m^(3)),Station University of Kankan(2491.5 m^(3))and Salamani(369.6 m^(3)).Waste from three landfills/dumps was characterized for 26 *** characterization covered 5,010.6 kg of waste,composed of 4263.9 kg of organic matter,462.1 kg of recyclable matter and 284.6 kg of inorganic *** survey concerned a target population of 403 inhabitants,which made it possible to determine a production ratio per habitant per day of(0.48 kg/habitant/d).Finally,a composting experiment of 2000 kg of organic matter was carried *** results obtained during this study constitute the basic elements allowing defining a better policy of management of household solid waste in the city of Kankan.

关键词： Management household waste characterization recovery and composting

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Design and Production of a Device for Remote Control by GSM of the Operating Parameters of a Biodigester

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Journal of Energy and Power Engineering 2023年第3期17卷 78-85页

作者： Kade Bailo Bah ansoumane sakouvogui Jean OuèréToupouvogui Mamby Keita Mawiatou BAH Department of Instrumentation and Physical Measurements Higher Institute of TechnologyMamouBP 63Guinea Energy Department Mamou Higher Institute of TechnologyMamouBP 63Guinea Department of Instrumentation and Physical Measurements Higher Institute of Technology of MamouBP 63Guinea Polytechnic School of Engineers Kofi Annan University of GuineaRatomaConakryBP 1367Guinea Department of Physics Faculty of SciencesGamal Abdel Nasser University of ConakryBP 1147Guinea

This article describes the design and creation of a remote monitoring and control system based on GSM(Global System for Mobile)communications technology for monitoring the key parameters of a *** are widely used for the conversion of organic materials into biogas,thereby contributing to renewable energy production and organic waste ***,real-time monitoring and regulation of parameters such as temperature,humidity,product gas level,pH are essential to ensure the efficiency and safety of the digestion *** created the device for remote control of the operating parameters of the biodigester using an Arduino card,a DHT11 sensor,a pH sensor,a GSM module and a 2×16 LCD(Liquide-Crystal-Display)display.A biodigester(4.5 L plastic container)and accessories were *** experimental device created made it possible to remotely monitor the evolution of the temperature,humidity,the gas produced as well as the pH in the digester loaded with cow dung,for 45 *** of the real-time evolution of the parameters measured by the device produced showed the same results as those carried out locally by the usual instruments,with a correlation coefficient of around 98%.During this digestion period,the temperature provided by the sensor varied from 25°C to 37°C(mesophilic mode)and the humidity levels varied from 70%to 95%.The results obtained show the reliability of the device *** research represents a significant advance in the management of biodigestion *** offers a powerful tool to maximize biogas production,reduce maintenance costs,minimize environmental impact and contribute to the transition to cleaner,renewable energy.

关键词： Biodigester remote control GSM biogas waste management.

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