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Dissertations / Theses on the topic 'Biogas digesters'

Author: Grafiati

Published: 4 June 2021

Last updated: 21 February 2023

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1

Kidby, David W. "Biogas hydrogen as an indicator of digester instability in anaerobic sewage sludge digesters." Thesis, University of Essex, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280473.

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2

Tumwesige, Vianney. "Adaptation of small scale biogas digesters in sub-Saharan Africa." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=234015.

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While facing increasing challenges in Sub-Saharan Africa (SSA) of climate change, population growth and deforestation, over 700 million people rely on biomass fuels to meet their basic cooking and heating needs. Increasing use of biomass fuels has resulted in negative impacts on the environment through land degradation and deforestation. To overcome problems associated with using biomass fuels, some households in SSA have adopted biogas as an alternative cooking fuel. Use of biogas production technology has led to the development of a number of different biogas appliances. However, these appli

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3

Hall, Stephen. "Optimisation of biogas production from percolating packed bed anaerobic digesters." Thesis, University of South Wales, 1986. https://pure.southwales.ac.uk/en/studentthesis/optimisation-of-biogas-production-from-percolating-packed-bed-anaerobic-digesters(6825c6bf-4ee7-439e-832a-28aa8b7cd4d3).html.

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Percolating packed bed digesters were operated successfully in a batch mode using a wheat straw - dairy manure substrate of between 21 and 27% total solids. The vessels used had a nominal 10 1 volume and were constructed of perspex. Temperatures of 25-35°C were used, recirculation rates of 0-15 litres.hr-1 (the digesters having a diameter of 0.18 metres thus corresponding to superficial flow rates of between O and 0.382 l/m2 /hr), solid : liquid ratios of 1:1 to 4:1 and bed heights of 0.26 to 2.05 metres. The optima found were a temperature of 35°C, recirculation rate of 3 litres.hr1-, a solid

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4

Castano, Juan Mauricio. "Anaerobic Digestion of Low Rate Digesters in Temperate Climates." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345220853.

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5

Langley, Kyle Anthony. "Potential benefits and experienced challenges of small household biogas-digesters for rural households." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/d1021268.

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Access to renewable energy supplies is a critical foundation for sustainable development and poverty alleviation. Anaerobic biogas-digesters also referred to as bio-digesters, have been identified as one of the leading technologies with regards to assisting in improving energy access for remote rural areas that still remain dependent upon biomass usage. This thesis assesses the potential feasibility of bio-digesters for rural households in South Africa by focusing on the experiences of a remote and rural community in Eastern Cape. A standardised survey was used to capture household details and

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6

Nguyen, Vo Chau Ngan. "Small-scale anaerobic digesters in Vietnam - development and challenges." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-88525.

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Small-scale anaerobic digesters, known as biogas plants, were applied as an optimal livestock waste treatment as well as biogas supply for cooking and lighting demand for small-scale farmers in Vietnam. Although the biogas technology was introduced for nearly 30 years, the number of the constructed biogas plants is still limited. The current development of biogas plants is far below the real demand on livestock waste treatment that has increased significantly. This paper gives a comprehensive overview on the biogas plant development in Vietnam and attempts to address the challenges and discuss

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7

Moreira, AndrÃ Pimentel. "Controle de vazÃo de biogÃs com baixa pressÃo para produÃÃo descentralizada de eletricidade." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6732.

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Banco do Nordeste do Brasil<br>A presente dissertaÃÃo propÃe a implementaÃÃo de um sistema de aquisiÃÃo de dados, controle e monitoramento de uma planta de geraÃÃo de energia elÃtrica acionada por biogÃs. Foi realizado o estudo experimental das estratÃgias de modelagem, identificaÃÃo e controle aplicado ao controle de vazÃo da planta de biogÃs do LaboratÃrio de Energias Alternativas - LEA da Universidade Federal do CearÃ - UFC. Foi utilizado e testado para o controle de vazÃo de biogÃs o controlador PI paralelo, alÃm de realizar a comparaÃÃo com o controle existente (controle centrÃfugo) do co

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8

Sauve, Terrence. "Enhancement of Biogas Production Using Co-Substrates In Anaerobic Digesters for Medium Size Dairy Farms." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28635.

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The use of co-substrates can significantly enhance biogas production from manure while helping to treat and dispose of high carbon organic wastes from the food processing industry and municipalities. This thesis will focus on the experimental setup and results collected at the University of Guelph -- Campus d'Alfred from a series of Biochemical Methane Potential assays and six 30 L semi-continuous anaerobic digesters operating under mesophilic conditions. The co-substrates investigated during the study include: corn silage, canola meal, whey, glycerine and dissolved air floatation sludge. The

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9

Sindall, Rebecca Clare. "Increasing the efficiency of anaerobic waste digesters by optimising flow patterns to enhance biogas production." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5636/.

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Anaerobic digestion is used to stabilise sewage sludge and produce biogas. Whilst the need to mix digesters is well-recognised, the level of mixing required and its effects on biogas production are not clear. Here, the effects of mixing speed in mechanically-mixed lab-scale digesters on biogas production are considered. For the first time, positron emission particle tracking was used to visualise flow patterns in lab-scale digesters at different mixing speeds. Computational fluid dynamics models were then built to identify the turbulence characteristics. Four lab-scale digesters were run for f

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10

Tukana, Andrew, University of Western Sydney, of Science Technology and Environment College, and School of Environment and Agriculture. "A study of biogas digesters as an animal waste management tool on livestock farming systems in Fiji." THESIS_CSTE_EAG_Tukana_A.xml, 2005. http://handle.uws.edu.au:8081/1959.7/632.

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Ever since 1976, livestock farmers in Fiji have been intrigued about biogas digesters as an animal waste management measure, but the concept has never evolved into one that is sustainable. Renewed interest came in 1997 after a better Chinese Modified Dome (CMD) design was established, with this came government funding, however by 2002, some failure was also observed. This study set out to investigate the reasons why biogas digesters have never been established as a sustainable concept, its effectiveness as an animal waste management tool and what changes if any, can be made to try and influenc

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11

Tukana, Andrew. "A study of biogas digesters as an animal waste management tool on livestock farming systems in Fiji." Thesis, View thesis, 2005. http://handle.uws.edu.au:8081/1959.7/632.

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Ever since 1976, livestock farmers in Fiji have been intrigued about biogas digesters as an animal waste management measure, but the concept has never evolved into one that is sustainable. Renewed interest came in 1997 after a better Chinese Modified Dome (CMD) design was established, with this came government funding, however by 2002, some failure was also observed. This study set out to investigate the reasons why biogas digesters have never been established as a sustainable concept, its effectiveness as an animal waste management tool and what changes if any, can be made to try and influenc

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12

Tukana, Andrew. "A Study of biogas digesters as an animal waste management tool on livestock farming systems in Fiji /." View thesis, 2005. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20060502.151953/index.html.

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Thesis (M. Sc.) (Hons) -- University of Western Sydney, 2005.<br>" A thesis presented to the School of Environment and Agriculture, University of Western Sydney, in fulfilment of the requirements for the degree of Master of Science (Honours)." Includes bibliography : leaves 165 -175, and appendices.

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13

Dhital, Avinash. "Opportunities for small-scale anaerobic digesters for hotels and restaurants in Kathmandu, Nepal." Thesis, KTH, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-244406.

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About 83% of total energy consumed in Nepal comes directly from the solid fuels. The import of Liquified Petroleum Gas (LPG) is also growing at an exponential rate. The hospitality subsector (hotels and restaurants), one of the key economic subsectors in the country, consumes most of the energy within the commercial sector primarily for cooking purposes. The bio-waste generated from growing hospitality subsector and other sectors in Kathmandu is poorly managed. Similarly, on the other hand, Nepal has an extensive knowledge and experience of manure based anaerobic household biogas systems mainl

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14

Dobrzanska, Dorota A. "Using bio-adhesive and bio-inert surfaces to maximize biogas production and influence microbial growth in anaerobic digesters." Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/66487/.

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The optimisation of biogas digesters is crucial for further development of sustainable energy sources. In this research, an integrative approach was taken to understanding how this problem can be addressed including: seeking a better understanding of protein – surface interactions on the molecular level; larger scale experiments to screen the best materials for use in laboratory scale anaerobic digesters to influence microbial growth and biofilm development as well as analysis of farm-scale data using the ADM1 multiparameter model. The laboratory-scale experiments were undertaken to develop su

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15

Wilhelmsson, Ella. "Investigations of the Effects of Lowering the Temperature in Full Scale Mesophilic Biogas Digesters at a Wastewater Treatment Plant." Thesis, Linköpings universitet, Tema Miljöförändring, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167059.

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This thesis has investigated the effects of running the two full scale biogas digesters at Slottshagen wastewater treatment plant at 34 °C compared to 37 °C, in terms of process stability, biogas production and energy savings with the aim of saving energy and money by not heating the digesters as much. The main objective was to investigate whether it is at all possible to operate the biogas process at 34 °C or if the process becomes inhibited or otherwise unstable. If the process could be operated at 34 °C it might mean savings of both energy and money, provided that there is still a sufficien

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16

Rowse, Laurel Erika. "Design of Small Scale Anaerobic Digesters for Application in Rural Developing Countries." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3324.

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The high incidence of upper respiratory diseases, contamination of waterways due to pathogens and nutrients from human and animal wastes, unsustainable deforestation, gender disparities in burden of disease due to unequal exposure to indoor air pollutants, and carbon black emissions from the burning of solid fuels are interrelated problems in many developing countries. Small scale anaerobic digestion provides a means of alleviating these problems by treating livestock waste onsite to produce biogas (methane and carbon dioxide) in rural areas in developing countries. Fuel can then be used for c

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17

Stoddard, Isak. "Communal Polyethylene Biogas Systems : Experiences from on-farm research in rural West Java." Thesis, Uppsala University, Global Energy Systems, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-131203.

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<p>In Lembang, a farming community on western Java, family-sized, plug-flow, polyethylene biogas systems fed with cow dung, are being used as an integrated solution to issues related to energy, agriculture and waste management. Through simple, on-farm research and observation, a number of key problems have been addressed and improvements made to the design. Due to the large supply of cow dung in the area, and the potential to spread the benefits of the technology beyond the homes of dairy farmers, the feasibility of developing a communal, polyethylene biogas system for several households, has

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18

Rehman, Zia-ur [Verfasser], Roland [Gutachter] Span, and Mandy [Gutachter] Gerber. "Process stability in biogas digesters : influencing parameters control using carbonate addition / Zia-ur Rehman ; Gutachter: Roland Span, Mandy Gerber ; Fakultät für Maschinenbau." Bochum : Ruhr-Universität Bochum, 2019. http://d-nb.info/1182682308/34.

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19

Rockenbach, Felipe Luis. "VIABILIDADE ECONÔMICA DA PRODUÇÃO DE BIOGÁS EM GRANJAS DE SUÍNOS, POR MEIO DA ANÁLISE DE SÉRIES TEMPORAIS." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/8320.

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This study aims to gather, analyze, and interpret the potential and economic feasibility of sequestering carbon dioxide and/or generating renewable energy from the processing of pig manure, via time series analysis, using the Box and Jenkins (1970) models for future prediction. Swine production systems generate large amounts of waste which are highly polluting and impact the environment, principally greenhouse gases. When treated, these gases produce methane gas and in turn biogas, which when removed correctly is converted into electricity and carbon credits, leaving behind a high quality biof

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20

Aires, Airon Magno. "Biodigestão anaeróbia da cama de frangos de corte com ou sem separação das frações sólida e líquida /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/96593.

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Orientador: Jorge de Lucas Júnior<br>Banca: Mônica Sarolli Silva de Mendonça Costa<br>Banca: Roberto Alves de Oliveira<br>Resumo: Objetivou-se avaliar o efeito da reutilização das camas de quatro lotes de frango de corte, sobre a produção de biogás, sendo estas submetidas ou não à diluição e separação de sólidos e líquidos em biodigestores operados em batelada e contínuo. No Capítulo 1 é apresentado o problema, a justificativa do estudo juntamente com os objetivos gerais do projeto. O Capítulo 2 teve como objetivo avaliar as diluições de cama de frango e as concentrações de Sólidos Totais (ST)

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21

Barichello, Rodrigo. "O USO DE BIODIGESTORES EM PEQUENAS E MÉDIAS PROPRIEDADES RURAIS COM ÊNFASE NA AGREGAÇÃO DE VALOR: UM ESTUDO DE CASO DA REGIÃO NOROESTE DO RIO GRANDE DO SUL." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/8169.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>From the duration of the Kyoto Protocol, there has been a renewed interest in technology of bio-digesters. As they allow a reduction in the emission of greenhouse gases compared to other waste treatment methods, their deployment can permit the marketing of carbon credits, resulting in money. The present study aims to analyze the process of dissemination of this technology in Santa Rosa, situated in the northwestern of Rio Grande do Sul state, especially powered by private companies. The profile properties that have these installed

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22

Aires, Airon Magno [UNESP]. "Biodigestão anaeróbia da cama de frangos de corte com ou sem separação das frações sólida e líquida." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/96593.

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Made available in DSpace on 2014-06-11T19:28:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-02-20Bitstream added on 2014-06-13T20:08:42Z : No. of bitstreams: 1 aires_am_me_jabo.pdf: 8042698 bytes, checksum: cee6205ffc3aed9386f08ebaca4e0466 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Objetivou-se avaliar o efeito da reutilização das camas de quatro lotes de frango de corte, sobre a produção de biogás, sendo estas submetidas ou não à diluição e separação de sólidos e líquidos em biodigestores operados em batelada e contínuo. No Capítulo 1 é aprese

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23

Racz, Tiffany A. "Anaerobic Digestion of Wastewater-Grown Algae Biomass With Optimized Biogas Yields and Nutrient Solubilzation." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/2245.

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Whole-cell algae biomass grown on nutrient-rich wastewater can be anaerobically digested to produce renewable heat and power, and to solubilize nutrients to grow additional algae biomass in a biorefinery system. In this study, algae biomass was grown on clarified primary wastewater in 33-m2 ponds at a 4-day residence time with sedimentation harvesting of the biomass. Lab digesters were used to test biogas yields and nutrient solubilization from the anaerobic digestion of algal biomass with and without mixing and with sonication as a pretreatment. Additionally, algae were fed to unheated and un

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24

Carvalho, Eraldo Henriques de. "Disposição de resíduos gerados nas estações de tratamento de água em estações de tratamento de esgoto com decantação primária." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-13072018-091220/.

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No presente trabalho foram realizados estudos para verificar as interferências do lançamento de resíduos de Estações de Tratamento de Água nas Estações de Tratamento de Esgoto com decantação primária. A ETA estudada utilizava cloreto férrico como coagulante primário e possuía decantadores com descarga de fundo diária. As interferências nos decantadores primários da ETE foram simuladas por meio de testes de sedimentação e nos digestores de lodo, por meio de testes de tratabilidade anaeróbia. Testes e análises complementares também foram realizados para verificar eventuais interferências no trat

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25

Dornack, Christina. "Biogas production from organic waste and biomass - fundamentals and current situation." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-99414.

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The use of renewable waste for bioenergy production is in discussion because of the concurrence to the food or animal feed. The treatment of organic waste is necessary in order to keep clean the environment. The combination of those proposals, the waste utilization and the production of renewable energy can be combined with several techniques. In Vietnam the energy demand will increase rapidly in the next years, because a lot of people do not have access to electricity. The development of power sources is limited mainly to large central power plants using hydropower and traditional fossil fuel

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26

Laperrière, Wendy. "Évaluation des limites d'un digesteur biogaz pour une utilisation flexible dans un réseau local de production d'énergie." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT068/document.

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Avec l’augmentation de la part des énergies renouvelables intermittentes (solaire et éolien) dans les mix énergétiques, des problèmes dans la stabilité de la fourniture d’électricité peuvent se présenter. La solution pour compenser ces fluctuations réside dans la production flexible de biogaz. Le biogaz peut en effet être stocké puis utilisé en période de demande; sa production doit donc être assurée de manière flexible, contrairement à ce qui est fait actuellement sur la majorité des digesteurs. L’objectif de la thèse était d’étudier et de déterminer les limites de digesteurs biogaz en foncti

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27

Tramoni, Félicien. "Analyse du traitement et de la gestion durable des boues d’épuration en Corse. Proposition de solutions énergétiques alternatives, axées sur la méthanisation des boues avec production d’énergies, aux méthodes appliquées en Corse. Utilisation de l’outil d’aide multicritère à la décision dans le cadre du surclassement de ces nouveaux procédés." Thesis, Corte, 2015. http://www.theses.fr/2015CORT0019.

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La qualité des boues est directement liée à la qualité des étapes de traitement présentes au sein d’une station d’épuration. En termes de traitement et d’élimination des boues, nous observons de la part des acteurs locaux, une volonté d’abandon définitif et durable de la filière « dépôt en centre de stockage », étant donnée une règlementation et des plans régionaux (notamment le PREDIS de Corse), toujours plus exigeant en termes de valorisations des déchets industriels et spéciaux. Nous observons également un abandon progressif et programmé des pratiques relatives à l’épandage. En effet, l’épa

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28

Stephenson, Robert John. "A comparison of retained biomass anaerobic digester designs." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26740.

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The principles behind anaerobic digestion are fairly well understood, but the limits of application of each digester design are not known. Because there are significant differences in the properties of the many wastewaters requiring treatment optimal anaerobic digester performance requires the matching of feed characteristics to a digester design and mode of operation. No consensus has yet emerged on digester design, operating conditions or feed/digester match-ups. In this study, three bench scale retained biomass anaerobic digester designs were examined for their response to a sequence of va

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29

Tcha-Thom, Maglwa. "Recherche d'une filière durable pour la méthanisation des déchets de fruits et d'abattoirs du Togo : Evaluation du potentiel agronomique des digestats sur les sols de la région de la Kara." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0061/document.

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La digestion anaérobie, procédé d’énergie renouvelable, constitue un atout indéniable de récupération des flux matière et énergie des déchets en réponse aux enjeux du développement durable. Ainsi, la présente étude a pour objectif de contribuer à la compréhension des mécanismes qui gouvernent l’environnement réactionnel de digestion en anaérobie et les effets des digestats sur la matrice bio-physico-chimique des sols à vocation agricole. Le développement des tests de lixiviation en réacteurs contrôlés aérobie et anaérobie, les modes de mobilisation du contenu organo-minéral des substrats et la

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Moazedian, Amitis. "Energy Extraction from Horse Manure Biogas plant vs. Heating Plant : A Case Study in Wången." Thesis, Mittuniversitetet, Institutionen för teknik och hållbar utveckling, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-19192.

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Wången is a trotting school located in Alsen region in Mid Sweden. Currently they keep almost 105 horses in their premises, which produce 2 400 m3 of stall waste per year. Stall waste has always been a concern for those who keep animals, and though composting has been a viable solution to this problem for quite some time, it is no longer the only solution. Stall waste can be converted to energy and there are different techniques and approaches to do so. In this study the writer compares the viability of two possible techniques (Biogas and heating plant) by collecting data from two existing b

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Freitas, Andrew Daniel Sanchez. "Method Development for the Synthesis of Anaerobic Digester Biogas with the Laboratory Environment." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51388.

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Biogas, a gaseous mixture produced during decomposition of organic matter, is a renewable, easily generated and common byproduct of anaerobic digestion at wastewater treatment plants (WWTP), landfills and agricultural operations. There is growing interest in researching and utilizing the energy potential associated with its combustion. Siloxanes, a family of volatile organic silicon compounds, pose large impediments to biogas usage due to the formation and precipitation of silicon dioxide within combustion devices. Removal of siloxanes prior to combustion is therefore a growing endeavor. Resea

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Silva, Ireneu Pereira de Miranda. "Sistemas de agitação para digestores anaeróbios." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/1711.

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Mestrado em Engenharia e Gestão Industrial<br>A Digestão anaeróbia envolve o processo da agitação de digestores que permite, por um lado, aumentar a probabilidade do contacto entre o substrato e os microrganismos que o degradam e por outro, facilita a libertação do biogás produzido, produto de determinadas reacções que ocorrem durante o complexo processo da digestão (fase metanogénica). Pretende-se com este trabalho encontrar um sistema de agitação de digestores, que por um lado cumpra os requisitos de qualidade funcionais inerentes à sua função, e que por outro lado seja o mais económico poss

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Mukumba, Patrick. "Modelling of the performance of a batch biogas digester fed with selected types of substrates." Thesis, University of Fort Hare, 2013. http://hdl.handle.net/10353/d1016197.

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The increasing population and the rapid economic growth in South Africa have led to higher consumption of food resulting in the generation of large amounts of waste. In addition, South Africa has plenty of biomass from cattle, donkeys, horses, goats, pigs, chicken and sheep. However, anaerobic digestion could be an alternative solution for the utilization of these kinds of waste due to its environmental and economic benefits. Therefore, the main focus of the research was design, construct a field batch biogas digester, monitor its performance when fed with co-substrates and model the methane y

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Bercelli, Lorenzo. "Modellizzazione di un digestore anaerobico per la produzione di biogas da rifuti zootecnici." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22933/.

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Il digestore anaerobico è una vasca contenente materiale organico in decomposizione (substrato). Selezionando le popolazioni batteriche che operano questa decomposizione, si può ottenere una digestione del substrato che produca una miscela di metano e anidride carbonica (biogas) come materiale di scarto. Il substrato digerito a seguito della permanenza nel digestore (digestato), povero di attività biologica ma ricco di micronutrienti, può infine essere smaltito facilmente, per esempio spargendolo sul suolo come fertilizzante. Le popolazioni batteriche agenti si sviluppano dunque in un equilib

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Moço, Eunice Alexandra dos Santos. "Projeto de uma unidade produtora de biogás." Master's thesis, Instituto Politécnico de Tomar, 2012. http://hdl.handle.net/10400.26/5847.

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Começa-se a acreditar que a sociedade poderá colapsar, caso não se resolvam alguns problemas de foro estrutural e de comportamento, em particular os problemas associados à sustentabilidade, ou falta dela, dos recursos energéticos. Num momento em que Portugal se encontra numa crise económica profunda, as alternativas que possam reduzir a nossa dependência de combustíveis fósseis são cada vez mais determinantes para o nosso futuro. É verdade que as fontes de energia renovável estão a ganhar grande relevo, particularmente em Portugal. Mas, as bioenergias estão ainda em segundo plano, face

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Khan, MD Ershad Ullah. "Feasibility Analysis of Biogas Based Polygeneration for Rural Development in Bangladesh." Licentiate thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145207.

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Around three-quarters of Bangladeshis (total population 164 million) live in rural areas: only 25% of these households have access to grid electricity with non-reliable supply despite the country’s successful rural electrification program, kerosene is the predominant source for lighting, and woody biomass is virtually the only option available for cooking. Aside from this energy service challenges the rural population also struggles with unsafe drinking water in terms of widespread arsenic contamination of well water. Access to electricity, clean cooking gas, and safe drinking water services a

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Gajardo, Alarcón Ninoska Loreto. "Estudio de la producción de biogás en función de la temperatura en un biodigestor tipo chino." Tesis, Universidad de Chile, 2013. http://www.repositorio.uchile.cl/handle/2250/114944.

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Memoria para optar al título profesional de Ingeniera en Recursos Naturales Renovables<br>La temperatura es un parámetro importante para el desarrollo de la digestión anaeróbica, que es la base de la producción de biogás; puede limitar sectores para aplicar la tecnología, regular la eficiencia, ayudar en la eliminación de patógenos, afectar el tiempo de retención de la materia e incrementar la producción de biogás. Este trabajo se desarrolló para evaluar la dinámica de producción de biogás en función del régimen térmico, estableciendo la relación entre las temperaturas que afectan a un biodige

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Vathsava, Rajoli Sree. "Retrofitting analysis on first generation ethanol production." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-372.

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First generation bioethanol generated from feedstocks is a sustainable alternative to fossil fuels, and the demand for fuel ethanol has promoted studies on the use of the grain as feedstock. This thesis describes various process designs and the economic feasibility for producing the main product ethanol and other by-products such as Biogas and DDGS (Distillers Dried Grains with Solubles) from the grain. The techno-economic analysis was performed by the data provided by Agroetanol industry, located in Norrköping, Sweden. The key target of this simulation work was to evaluate the influence of se

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Jeyanayagam, Samuel S. "Engineering analysis of a Chinese-type anaerobic digester." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49800.

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Agustini, Caroline B., Costa M. Da, M. Gutterres, and A. C. C. Pena. "Monitoring of biogas production from tannery solid wastes at-line in a laboratory-scale anaerobic digester - 163." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34307.

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Content: The understanding of how chemical, physical and environmental parameters work during anaerobic digestion production and waste treatment is an important step in improving the efficiency and process stability. This study provides the evolution of the biogas production and the efficiency of the treatment of the anaerobic digestion of solid wastes of tanneries at-line monitored in batch laboratory-scale bioreactors. Leather shavings and sludge from wastewater treatment plants substrates were considered in the study. The findings suggest that AD of the tannery solid waste can be separated

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Rempel, Neuri. "Biodigestão anaeróbica da fração orgânica de resíduos sólidos urbanos consorciado com glicerina." Universidade do Vale do Rio dos Sinos, 2014. http://www.repositorio.jesuita.org.br/handle/UNISINOS/3373.

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Submitted by Maicon Juliano Schmidt (maicons) on 2015-04-27T17:27:26Z No. of bitstreams: 1 Neuri Rempel.pdf: 1414299 bytes, checksum: e09f1fc8267c07d066f0e701aca28d19 (MD5)<br>Made available in DSpace on 2015-04-27T17:27:26Z (GMT). No. of bitstreams: 1 Neuri Rempel.pdf: 1414299 bytes, checksum: e09f1fc8267c07d066f0e701aca28d19 (MD5) Previous issue date: 2014-01-30<br>CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>FINEP - Financiadora de Estudos e Projetos<br>Ministério da Ciência, Tecnologia e Inovação<br>O aproveitamento energético da fração biodegradável dos Re

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Ek, Anders. "Ultrasonic treatment of sewage sludge in order to increase biogas yields." Thesis, Linköping University, Department of Water and Environmental Studies, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4581.

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<p>Biogas, a mixture of methane and carbon dioxide, is produced in the anaerobic digestion of sewage sludge. After anaerobic digestion, the digested sludge is often allowed to degas for one or two days. This gas is seldom utilised, but if the degassing could be accelerated, utilisation would be easier. Ultrasound can be used as a pretreatment method for waste activated sludge. It has a disintegrating effect on the sludge and causes lysis of bacteria in the sludge. It also speeds up the hydrolysis; the limiting step of anaerobic digestion of waste activated sludge. Ultrasound can be used to deg

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Fukayama, Ellen Hatsumi [UNESP]. "Características quantitativas e qualitativas da cama de frango sob diferentes reutilizações: efeitos na produção de biogás e biofertilizante." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/104913.

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Made available in DSpace on 2014-06-11T19:33:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-07-18Bitstream added on 2014-06-13T18:45:22Z : No. of bitstreams: 1 fukayama_eh_dr_jabo.pdf: 525968 bytes, checksum: 2de8151a4f75d0ad1dc36da356f16775 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Objetivou-se avaliar o efeito da reutilização de cama de quatro lotes de criações de frangos de corte sobre a produção de cama de frango, a produção de biogás e a utilização do biofertilizante

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Santos, Cristiano Vieira dos. "Análise da potencialidade da casca do amendoim como resíduo gerador de biogás na agricultura familiar /." Tupã, 2020. http://hdl.handle.net/11449/192843.

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Orientador: Ana Elisa Bressan Smith Lourenzani<br>Resumo: Diante da constante busca pelo avanço na melhoria da matriz energética global, as energias renováveis assumem papel de suma importância para atender os Objetivos de Desenvolvimento Sustentável (ODS). O município de Herculândia, no oeste do estado de São Paulo, possui como principal atividade econômica a produção e processamento do amendoim. Durante esse processo é gerada uma grande quantidade de cascas, resíduo com potencial gerador de energia. Nesse contexto, o problema de pesquisa consiste na seguinte questão: qual o potencial de prod

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Mažrimas, Jonas. "Technologinių rodiklių įtaka Kauno nuotekų valyklos metantanko veikimo efektyvumui." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120530_124508-96080.

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Darbo tikslas – nustatyti technologinių rodiklių įtaką Kauno nuotekų valyklos metantanko efektyvumui. Darbo uždaviniai: nustatyti išsiskyrusių biodujų debito priklausomybę nuo temperatūros, organinės medžiagos suirimo laipsnio, palyginti teorinį ir faktinį pagaminamų biodujų kiekį. Tyrimo objektai: Kauno miesto nuotekų valykloje dumblo pūdymui periodiškai naudojami du metantankai. Tyrimo metodika: buvo stebimi pagrindiniai rodikliai, įtakojantys biodujų išeigą metantanke: pirminio dumblo debitas, perteklinio dumblo debitas, temperatūra ir organinės medžiagos suskilimo laipsnis. Apskaičiuotas o

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46

Fukayama, Ellen Hatsumi. "Características quantitativas e qualitativas da cama de frango sob diferentes reutilizações : efeitos na produção de biogás e biofertilizante /." Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/104913.

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Orientador: Jorge de Lucas Junior<br>Banca: Roberto Alves de Oliveira<br>Banca: Júlio Cesar Pascale Palhares<br>Banca: Nilva Kazue Sakomura<br>Banca: Mônica Sarolli Silva de Mendonça Costa<br>Resumo: Objetivou-se avaliar o efeito da reutilização de cama de quatro lotes de criações de frangos de corte sobre a produção de cama de frango, a produção de biogás e a utilização do biofertilizante para adubação de milho. No capítulo sobre produção de cama foram avaliados quatro reutilizações de cama de frangos de corte criados em um galpão comercial dividido em 12 boxes pertencente à Empresa Rei Frang

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47

Bradáč, Antonín. "Návrh optimálního promíchávání velkokapacitních vyhnívacích nádrží." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318823.

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The aim of this diploma thesis is an optimal method of mixing of the digester with consideration to the uniform mixing of the whole volume, ensuring the quality process conditions for the anaerobic fermentation and the maximum yield and quality of the produced biogas. First chapters describe the basic design parameters, general calculations and the principles for design of individual types of mixers, supplemented by practical examples of mixing large capacity tanks. The work introduces the problem of sludge formation at the sewage treatment plant with an emphasis on sludge treatment and the pr

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48

Pérez, Medel Javier Andrés. "Estudio y Diseño de un Biodigestor para Aplicación en Pequeños Ganaderos y Lecheros." Tesis, Universidad de Chile, 2010. http://www.repositorio.uchile.cl/handle/2250/103926.

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Esta memoria se motiva en la necesidad energética de los pequeños ganaderos y lecheros de la zona sur de Chile y en la débil situación de diversificación de la matriz energética del país, es por esto que se propone un Biodigestor como solución viable a esta necesidad. Un Biodigestor es un equipo que produce gas metano (CH4), a partir de la descomposición de restos orgánicos, particularmente heces animales (vacunos, porcinos, etc.). Aquí se propone el diseño en términos de ingeniería básica, de un Biodigestor adecuado para las necesidades introducidas. La metodología comienza con una seri

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Sekar, Samantha. "The Effects of Biochar and Anaerobic Digester Effluent on Soil Quality and Crop Growth in Karnataka, India." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343750717.

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Steil, Lara [UNESP]. "Avaliação do uso de inóculos na biodigestão anaeróbia de resíduos de aves de postura, frangos de corte e suínos." Universidade Estadual Paulista (UNESP), 2001. http://hdl.handle.net/11449/88047.

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Made available in DSpace on 2014-06-11T19:23:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2001-09-27Bitstream added on 2014-06-13T19:08:56Z : No. of bitstreams: 1 steil_l_me_araiq.pdf: 799428 bytes, checksum: ea2cd9b8adbc44bdd76ac6b53c7d3a09 (MD5)<br>Investigou-se a influência da utilização de inóculos sobre a digestão anaeróbia de resíduos de aves de postura, frangos de corte e suínos em biodigestores modelo batelada com volume útil de 60 L operados à temperatura ambiente, por meio da caracterização do potencial e distribuição da produção de biogás ao longo do tempo, o estudo da red

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