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Dissertations / Theses on the topic 'Bioenergy2'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Plews, Ian Kenneth. "Sorghum bioenergy genotypes, genes and pathways." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2432.

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2

Niklasson, Johanna, and Skogfors Linnea Bergquist. "Can organic waste fuel the buses in Johannesburg? : A study of potential, feasibility, costs and environmental performance of a biomethane solution for public transport." Thesis, Linköpings universitet, Industriell miljöteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-149268.

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Like many large cities, Johannesburg faces several sustainability challenges such as unsustainable use of natural resources, emissions contributing to environmental- and waste related problems. The city is a provincial transport centre, and the transport sector is responsible for a large share of the city’s energy demand and emissions. To approach several of these challenges simultaneously the City of Johannesburg considers the possibilities to use renewable, waste-based, fuel for public transport and has shown a great interest in how Sweden produce and use biogas. In this study an early asse

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3

Bergström, Maria. "Pyrolysolja som bränsle för fjärrvärmeproduktion samt råvara till biodrivmedel : Egenskaper och prestanda vid lagring, förbränning och uppgradering." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-85314.

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För att Sverige ska nå klimatmålet om noll nettoutsläpp av växthusgaser till år 2045 behöver bland annat mer biobränslen fasas in och fossila bränslen fasas ut och därför behövs större produktion och fler alternativ av biobränslen. Pyrolysolja är ett alternativ till biobränsle som har forskats på sedan 1970-talet men som först för några år sedan börjat produceras i större skala för användning till värmeproduktion. Först i år startades även en byggnation för produktion av pyrolysolja som ska uppgraderas till biodrivmedel av Pyrocell. Pyrolysoljan har annorlunda egenskaper och sammansättning mot

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4

Persson, Andreas. "Utvärdering av hur mekanisk avvattning påverkar termisk torkning av sågspån : Försök med olika partikelstorlekar och temperaturer i en konvektiv tork." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-74310.

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5

Nordlander, Eva. "System studies of Anaerobic Co-digestion Processes." Doctoral thesis, Mälardalens högskola, Framtidens energi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36515.

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Production of biogas through anaerobic digestion is one pathway to achieving the European Union (EU) goals of reducing greenhouse gas emissions, increasing the share of renewable energy, and improving energy efficiency. In this thesis, two different models (Anaerobic Digestion Model No. 1 and an artificial neural network) are used to simulate a full-scale co-digester in order to evaluate the feasibility of such models. This thesis also includes models of two systems to study the inclusion of microalgae in biogas plants and wastewater treatment plants. One of the studies is a life-cycle assessm

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Sönefors, Adam. "Kylningens inverkan på pelletskvalitén : En studie om kylning av träpellets med olika kylningsmetoder." Thesis, Karlstads universitet, Avdelningen för energi-, miljö- och byggteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-67478.

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Det blir allt viktigare med fler hållbara och miljövänliga lösningar för att kunna ta itu med dagens miljökris och för att kunna ersätta de fossila bränslena. Pelletseldning är en lösning som anses vara koldioxid neutralt och går att elda året runt. För att pelleten ska vara lätthanterlig och tålig så är de b.la. viktigt med en bra bulkdensitet och hållfasthet. Där spelar kylning av pellets roll och därför skall detta examensarbete undersöka hur olika kylningsmetoder påverkar pelletsen kvalité. Ett antal prover av pellets tillverkades på Karlstad universitetet med en pelletsmaskin under två

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7

Zetterholm, Jonas. "Forest based biorefinery supply chains - Identification and evaluation of economic, CO2, and resource efficiency." Licentiate thesis, Luleå tekniska universitet, Energivetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67924.

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Biorefineries for production of fuels, chemicals, or materials, can bean important contribution to reach a fossil-free economy. Large-scaleforest-based biorefineries are not yet cost competitive with their fossil counterparts and it is important to identify biorefinery supply chain configurations with good economic, CO2, and biomass performance if biorefineries are to be a viable alternative to the fossil refineries. Several factors influence the performance of biorefinery supply chains,e.g. type of conversion process, geographical localisation, and produc-tion capacity. These aspects needs to

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8

Mishra, Navin. "Analysis of fault ride through disturbances in wind energy." Thesis, Högskolan i Halmstad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40474.

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9

Llavero, Pasquina Marcel. "Engineered light controlled cell development for enhanced hydrogen production in Nostoc punctiforme ATCC 29133." Thesis, Uppsala universitet, Mikrobiell kemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-294854.

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The aim of this thesis is to enhance heterocyst-based hydrogen production inNostoc punctiforme ATCC 29133. We envision to do so by finely regulatingthe ratio of heterocyst in order to optimize the filament energy balance. Wehereby report the development of an optogenetic synthetic switch basedon the native PcpeC promoter. The optogenetic switch featured a 24-folddynamic range when measuring reporter sfGFP fluorescence. Such a geneticgate was conceived to artificially drive the expression of hetR, the masterregulator of heterocyst development. We achieved to induce enhancedheterocyst differenti

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Olofsson, Jonny. "Sojaprotein, oxiderad majsstärkelse, vetestärkelse & ärtstärkelse som additiv i träpellets : Effekter på pelletsens kvalitet, CO2ekv utsläpp & energianvändning." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-64753.

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Currently, only 2.8% of total energy use in the world is renewable energy. As a climate target in 2020, the European Union has set a goal of increasing the renewable energy to 20%. Renewable energy includes biofuel such as pellets. Pellets use has already increased significantly and several large production units have been built in recent years. To achieve a competitive pellet, production must be improved in terms of quality, environmental impact, and electricity consumption. Adding additives can improve pellets strength, reduce CO2eq emissions and reduce energy consumption. The purpose is

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Leijen, Sebastian. "Semi-kontinuerlig samrötning av ensilerat våtmarksgräs och matavfall : En studie av metan utbyte." Thesis, Karlstads universitet, Avdelningen för energi-, miljö- och byggteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-62559.

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Världens ökande energibehov och önskan om att minimera konsekvenserna av klimatförändringen har gjort att flera miljömål tagits fram både på nationella och internationella nivåer. Mycket resurser läggs ner på att utveckla nuvarande förnyelsebara energikällor och hitta nya alternativ till de fossila bränslena. En förnyelsebar energiresurs är biogas. Biogas bildas vid nedbrytning av organiskt material och bildar koldioxid och energirik metangas. Detta examensarbete har fokuserat på två områden, det första att undersöka metanproduktionen i en samrötningsprocess med ensilage av våtmarksgräs och

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Andersson, Simon. "Pellet production of Sicklebush, Pigeon Pea, and Pine in Zambia : Pilot Study and Full Scale Tests to Evaluate Pellet Quality and Press Configurations." Thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55393.

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More deaths are caused every year by indoor air pollution than malaria, HIV/AIDS and tuberculosis combined. Cooking with traditional fuels such as charcoal and fuelwood with poor ventilation causes the single most important environmental health risk factor worldwide. It also contributes to environmental issues such as deforestation as traditional biomass fuels and cooking stoves are inefficient and requires large quantities of wood. This is especially critical in Africa where the largest regional population growth in the world is expected to occur. A solution to these issues was realized throu

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Isaksson, Simon. "Biogas production at high ammonia levels : The importance of temperature and trace element supplementation on microbial communities." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-350087.

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Chen, Binbin. "Pyrolytic biochar stability assessed by chemical accelerating aging method." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277933.

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Now that the EU and Sweden have adopted a new climate policy framework to regulate net carbon emission. A new concept, negative CO2 emission, has been considered to neutralize the CO2 generated from necessary consumption of fossil fuel. Biochar, as a pyrolytic product from biomass, can store carbon in a relatively stable way. Therefore, it is one of the most promising and outstanding tools for carbon sink. Biochar stability, defined as the ratio of remaining carbon in biochar after 100 years, is the most crucial factor when using biochar for carbon storage. So far, various approaches have been

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Karlsson, Jonas. "Modeling and simulation of existing biogas plants with SIMBA#Biogas." Thesis, Linköpings universitet, Teknisk biologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-138638.

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The main purpose of this project was an attempt to modulate and simulate two existing biogas plant, situated in Lidköping and Katrineholm, Sweden and evaluate how the process reacts to certain conditions regarding feeding, layout and substrate mixture. The main goal was to optimize the existing processes to better performance. Both the modeling and simulation were executed in SIMBA#Biogas with accordance to the real conditions at the plant in question. The simulation of each model was validated against data containing measurements of, CH4 yield, CH4 production, TS, VS, NH4-N concentration and

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Kimani, Duane. "Biodiesel and Hydrogen Production : A Study of Nostoc sp. in Pulp and Paper Wastewater." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-125085.

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The modernized world is over-consuming low-cost energy sources that strongly contributes to environmental stress. As a consequence, the interest for environmentally friendly alternatives has increased immensely. One such alternative is utilizing the diazotrophic nature of the heterocystous filamentous cyanobacteria Nostoc sp. as feedstock for biodiesel and hydrogen production using pulp and paper wastewater – a phosphorous and nitrogen deficient medium. In this work, biodiesel and hydrogen production was studied with respect to three main aspects: biodiesel quality properties, lipid content an

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Grandis, Adriana. "Respostas fotossintéticas e de crescimento da espécie amazônica Senna reticulata sob elevada concentração de CO2." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/41/41132/tde-18012011-171004/.

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Processos fisiológicos que modulam a aclimatação fotossintética e o crescimento de plantas ao aumento da concentração de CO2 atmosférico são desconhecidos para a maioria das espécies da região amazônica. Neste sentido, este estudo buscou compreender o comportamento fotossintético e a alocação de carbono em Senna reticulata. Esta espécie ocorre em regiões amazônicas que passam por períodos de seca e alagamento e como estratégia de estabelecimento possui crescimento rápido e alta capacidade fotossintética. O objetivo deste estudo foi comparar os parâmetros de trocas gasosas e de crescimento de p

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Parsland, Charlotte. "Study of the activity of catalysts for the production of high quality biomass gasification gas : with emphasis on Ni-substituted Ba-hexaaluminates." Licentiate thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-55702.

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The fossil hydrocarbons are not inexhaustible, and their use is not without impact in our need of energy, fuels and hydrocarbons as building blocks for organic materials. The quest for renewable, environmentally more friendly technologies are in need and woody biomass is a promising candidate, well provided in the boreal parts of the world. To convert the constituents of wood into valuable gaseous products, suitable for the end use required, we need a reliable gasification technology. But to become an industrial application on full scale there are still a few issues to take into account since

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Reuterswärd, Caspar. "Exploring the repurposing of cross laminated timber spillage." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-161026.

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Forestry is one of Sweden’s largest natural resources and a largeand important foundation for the country’s economic stability.There is a significant opportunity to evaluate material efficiencyand values in the supply chain of industrialised wood-basedproducts. This thesis comprises on handling a spill-product of amodern wood-based building material: cross-laminated timber(CLT). With the aim to increase value of this spill product throughpractical design iteration, material exploration and theoreticalanalysis. The material exploration leads to a collection of furnitureand interior products whi

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Xu, Vita. "The POTENTIAL OF MICROALGAE TECHNOLOGY AT THE CEMENT INDUSTRY ON GOTLAND." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445509.

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Due to the increasing climate change concerns, biofuels have attracted more attention in the energy field as potential alternative energy sources. Particularly, microalgal biofuel has stood out because of its higher fuel yield potential and lower water and land demand than terrestrial biomass. Because of its outstanding photosynthetic efficiency, the microalgal technology is also investigated by researchers around the world as a potential biological solution for carbon capturing in the industrial sector. To explore the prospects of microalgal technology in a local context, this research lays i

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Lerin, Tommy. "Förutsättningar och Avsättningar för Biogas för Gröna Vessigebro : Version 1.0." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-25745.

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The community Vessigebro, in Falkenberg and its surrounding areas housing one percent of all dairy cattle and two percent of all pigs in Sweden. This means that there is a large amount of manure as a basis for producing biogas in the area. A number of farmers have therefore formed a cooperative named Vessigebro biogas and started the project Green Vessigebro, with the goal of creating the conditions for a more profitable and more sustainable agriculture production. The study deals with the conditions and sale opportunities of the feasibility study Green Vessigebro. The study has looked at the

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Lopes, Merwyn. "Feasibility study: Biogas in Sonderborg." Thesis, KTH, Industriell ekologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33068.

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The purpose of this feasibility study has been to guide decision makers in the implementation of abiogas project for the region of Sønderborg, Denmark. The project has been part of Feasibility studies envisioned in the Master Plan for Sønderborg to go carbon neutral by 2029. The study tried to evolve abest alternative for the city and gives a ready document to refer all aspects of biogas. The intensive industrial farming in Sønderborg needs to evolve to compare favorably with the situationin other regions of Denmark. The interests of various stakeholders in the waste cycle should be alignedwit

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Helgesson, Per Otto Ragnar, and Gustaf Elias Båberg. "Biogasframställning på kryssningsfartyg." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-74557.

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Bränsle är en av det största kostnaden för sjöfart och ny teknik tas fram för att spara bränsle. Men det finns potential att tillverka bränsle på kryssningsfartyg. En av de största utgifterna för att tillverka biogas iland är uppvärmning av substratet, denna kostnad kan elimineras på fartyg genom att använda spillvärme från motorer och ångsystem. Detta arbete undersöker möjligheten att producera biogas av toalett- och matavfall som dagligen skapas på kryssningsfartyg, vilka komponenter som behövs samt beräkningar av utrymme de skulle ta och hur stor mängd gas som kan tänkas produceras. Rappo

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Wang, Shule. "Catalytic fast pyrolysis of softwood under N2 and H2 atmosphere." Thesis, KTH, Energi- och ugnsteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216995.

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Bio-oil generated from biomass is becoming one of the most promising alternatives as potential energy sources to replace fossil fuels in the transportation sector. Fast pyrolysis of biomass is one of the most economically feasible ways to produce bio-oil according to recent research on thermochemical conversion of biomass. Upgrading of oils derived from to hydrocarbon fuels requires oxygen removal and molecular weight reduction. Catalytic cracking and hydrotreating are two efficient processes to upgrade bio-oil. Hydrotreating requires that hydrogen is added in the process to increase the H/C

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Campos, Rafaela Faber de. "Potencial energético da biomassa e do carvão de espécies de bambu." Universidade Estadual de Ponta Grossa, 2017. http://tede2.uepg.br/jspui/handle/prefix/2575.

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Submitted by Eunice Novais (enovais@uepg.br) on 2018-07-24T18:08:19Z No. of bitstreams: 2 license_rdf: 1037 bytes, checksum: 996f8b5afe3136b76594f43bfda24c5e (MD5) RAFAELA FABER DE CAMPOS.pdf: 3462807 bytes, checksum: 7d5b40498bba51c7d7e5694876f08985 (MD5)<br>Made available in DSpace on 2018-07-24T18:08:19Z (GMT). No. of bitstreams: 2 license_rdf: 1037 bytes, checksum: 996f8b5afe3136b76594f43bfda24c5e (MD5) RAFAELA FABER DE CAMPOS.pdf: 3462807 bytes, checksum: 7d5b40498bba51c7d7e5694876f08985 (MD5) Previous issue date: 2017-02-02<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

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Carvalho, Guilherme Busi de. "Caracterização da produção de biomassa de capim-elefante (Pennisetum purpureum, Schum.), cv. Cameroon, em função da adubação nitrogenada e irrigação em região semiárida." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11143/tde-15092014-105600/.

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Tendo em vista o potencial de uso de biomassa obtida do capim-elefante como combustível de fonte renovável em regiões semiáridas, este trabalho teve por objetivo avaliar os efeitos de seis doses de nitrogênio (44, 200, 400, 600, 800 e 1000 kg.ha-1) e de sete lâminas de água (precipitação e irrigação com 0, 40, 54, 100, 135, 148 e 200% da evapotranspiração potencial da cultura - ETc) em sete idades de corte (46, 82, 112, 139, 169, 202 e 231 dias) sobre a produtividade de biomassa seca (BMS, kg.ha-1), altura (m) e índice de área foliar (IAF, m2.m-2) de capim-elefante, cultivar Cameroon. O experi

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Hansson, Sara. "Approaches to the Bioenergy Potential in 2050 : An assessment of bioenergy projections." Thesis, Uppsala universitet, Naturresurser och hållbar utveckling, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-314983.

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There is an abundance of reports and articles on the extent of future bioenergy usage. Decision-makers might turn to bioenergy projections in hopes of making informed decisions for policies or investments. This report aims to highlight irregularities and differences regarding calculations and results in 15 global bioenergy projection studies for the year 2050, and to find underlying connections by applying a metaanalysis with a methodological focus. Statistical distributions were made for the projected global bioenergy potentials. A growth rate study based on the projected global bioenergy pot

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Schyllander, Josefin. "Industriell symbios mellan algodling och industri för hållbar biomassaproduktion : Utvärdering av en industriellt integrerat algodling ur miljö-, energi- och kostnadssynpunkt." Thesis, Karlstads universitet, Avdelningen för energi-, miljö- och byggteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-56510.

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Klimatförändringarna har medfört en ökad efterfrågan på biobaserade bränslen. Mikroalger har flera intressanta egenskaper som gör dem till en attraktiv och lovande bioråvara för bränsleproduktion. Algerna har en effektiv fotosyntes vilket bidrar till ett lägre landanspråk jämfört med terrestra energigrödor. Dessutom kan odlingarna placeras på oproduktiv mark vilket gör att produktionen inte konkurrerar med andra areella näringar. Genom att integrera algodlingar med industriell infrastruktur kan restflöden som spillvärme, koldioxid, närsalter och vatten från industri nyttiggöras och därmed bidr

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Klug, Michael. "Pyrolysis -- a process to "melt" biomass." Revista de Química, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/101157.

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La pirolisis es un proceso termoquímico que ocurre en ausencia de oxígeno. El proceso de pirolisis tiene tres etapas: la dosificación y alimentación de la materia prima, la transformación de la masa orgánica y, finalmente, la obtención y separación de los productos (coque, aceite y gas). La planta piloto de la PUCP puede producir un biocombustible de segunda generación a partir de desechos orgánicos lo que responde al reto de un desarrollo sostenible de bioenergía en Perú.<br>Pyrolysis is a thermochemical process that occurs in absence of oxygen. The pyrolysis process has three stages: feeding

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Lindberg, Simon. "Förnybar gas för värmningsugnar i stålindustrin : Tekno-ekonomisk utvärdering av gasproduktion för SSAB Borlänge." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75181.

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Sverige strävar efter ett mer hållbart samhälle och har som mål att nå netto nollutsläpp av växthusgaser till atmosfären år 2045. Företag som agerar i Sverige måste därmed göra stora omställningar för att målet ska kunna nås. I detta arbete har möjligheten att ersätta SSAB Borlänges fossila bränslebehov i varmvalsningsprocessen med gas från termisk förgasning undersökts. Genom litteraturstudier, behovsanalys, beräkningar och modellering i Excel har fyra fallstudier med olika förgasningskoncept utvärderats. En stor utmaning har varit att ﬁnna lösningar för hantering av de stora värmelasterna i

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Ljungberg, Stina. "Drivkrafter och hinder ur ett multifunktionellt perspektiv : Förutsättningar och utvecklingsområden för produktion av biobränsle från våtmarker." Thesis, Södertörns högskola, Miljövetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-31057.

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Då Sverige redan nått flera av de energi- och klimatpolitiska målen kan målet om att skapa ett fossilfritt samhälle stå som ytterligare drivkraft för att fortsätta utvecklingen av de hållbara bränslena. Bidrag finns att få för att anlägga våtmarker, minska klimatpåverkan, förbättra naturmiljön och för utvecklandet av ny teknik samt bygga upp anläggningar för biobränsleproduktion. Trots detta har odling av våtmarksgrödor för energiutvinning ännu inte etablerats på energimarknaden. Denna studie är en del i kartläggningen av vad som kan komma att driva utvecklingen av våtmarker som källa till bio

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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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Ma, Charlie. "Aspects of Ash Transformations in Pressurised Entrained-Flow Gasification of Woody Biomass : Pilot-scale studies." Doctoral thesis, Luleå tekniska universitet, Energivetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62914.

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Pressurised entrained-flow gasification (PEFG) of woody biomass has the potential to produce high purity syngas for the production of vital chemicals, e.g., biofuels. However, ash-related issues such as reactor blockages and refractory corrosion need to be addressed before this potential can be realised from a technical perspective. These undesirable consequences can be brought about by slag formation involving inorganic ash-forming elements and the chemical transformations that they undergo during fuel conversion. The objective of this study was to elucidate the ash transformations of the maj

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Rego, Fernanda Orpinelli Ramos do. "Modelagem computacional de famílias de proteínas microbianas relevantes para produção de bioenergia." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/95/95131/tde-28082015-222248/.

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Modelos ocultos de Markov (HMMs - hidden Markov models) são ferramentas essenciais para anotação automática de proteínas. Por muitos anos, bancos de dados de famílias de proteínas baseados em HMMs têm sido disponibilizados para a comunidade científica (e.g. TIGRfams). Muitos esforços também têm sido dedicados à geração automática de HMMs de famílias de proteínas (e.g. PANTHER). No entanto, HMMs manualmente curados de famílias de proteínas permanecem como o padrão-ouro para anotação de genomas. Neste contexto, este trabalho teve como principal objetivo a geração de cerca de 80 famílias de prote

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Pinto, Luis Eduardo Vieira. "Energia da biomassa de cana-de-açúcar sob influência de hidrogel e cobertura vegetal em dois sistemas de plantio." Universidade do Oeste Paulista, 2011. http://bdtd.unoeste.br:8080/tede/handle/tede/395.

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Made available in DSpace on 2016-01-26T18:56:24Z (GMT). No. of bitstreams: 1 LUIS EDUARDO VIEIRA Dissertacao.pdf: 865847 bytes, checksum: 06dc7bc2cf42a06b1d2f3aacb74baaea (MD5) Previous issue date: 2011-06-21<br>Aiming to evaluate the interaction of hydrogel polymer and vegetation cover, in two planting systems (groove and windrow), the possible interference of the energy value of sugar cane biomass, at four dosages were used (0.0, 26.67, 53.33 and 80.00 kg of polymer per hectare) and four treatments with dry matter ratoon sugar cane, installed at the harvest of first cut in June 2009, and

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Taniguti, Lucas Mitsuo. "Propagação semi-automática de termos Gene Ontology a proteínas com potencial biotecnológico para a produção de bioenergia." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-05012015-175313/.

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O aumento no volume de dados biológicos, oriundos principalmente do surgimento de sequenciadores de segunda geração, configura um desafio para a manutenção dos bancos de dados, que devem armazenar, disponibilizar e, no caso de bancos secundários, propagar informações biológicas para sequências sem caracterização experimental. Tal propagação é crucial , pois o fluxo com que novas sequências são depositadas é muito superior ao que proteínas são experimentalmente caracterizadas. De forma análoga ao EC number (Enzyme Commission number), a organização de proteínas em famílias visa organizar e facil

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Passos, Vinícius Fabiano dos. "Utilização dos subprodutos da produção fermentativa de hidrogênio para a geração de energia em uma célula microbiana a combustível." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-06062018-083002/.

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O biohidrogênio, obtido a partir da fermentação de carboidratos, surge como alternativa aos combustíveis derivados de petróleo. O hidrogênio possui elevada densidade energética (141,9 J/kg) e a sua queima não emite carbono na atmosfera. Além disso, tecnologias modernas como as Células a Combustível Microbianas (CCM) estão sendo desenvolvidas para produção de energia elétrica a partir de matérias primas renováveis. O funcionamento dessas células envolve algumas reações, entre elas a oxidação dos compostos orgânicos, catalisada por microrganismos. Desse modo, o objetivo deste trabalho foi combin

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Petricoski, Silvia Maccari. "Briquetes produzidos com mistura de podas urbanas, glicerina e resíduos de processamento de mandioca." Universidade Estadual do Oeste do Paraná, 2017. http://tede.unioeste.br/handle/tede/2969.

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Submitted by Rosangela Silva (rosangela.silva3@unioeste.br) on 2017-08-31T17:05:31Z No. of bitstreams: 2 Silvia Macarri Petricoski.pdf: 2620168 bytes, checksum: f44863d59b0669f97542e59fbc5a4625 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DSpace on 2017-08-31T17:05:31Z (GMT). No. of bitstreams: 2 Silvia Macarri Petricoski.pdf: 2620168 bytes, checksum: f44863d59b0669f97542e59fbc5a4625 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-03-09<br>Throughout history, several sources and

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Welter, Carline Andréa. "Uso da biomassa florestal como estratégia de redução dos gases de efeito estufa: estudo de caso na fumicultura do sul do Brasil /RS." Universidade Federal de Santa Maria, 2017. http://repositorio.ufsm.br/handle/1/13279.

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Fumiculture is an activity of great economic importance in the South of Brazil and requires annually a large volume of forest biomass used in the curing process of tobacco leaves and accounting for almost 10% of production costs. Complete combustion of wood produces water vapor, CO2, heat and non-combustible ash. When combustion is incomplete, it occurs to the formation of CO, hydrocarbons and other gases. As an alternative to firewood, the use of agroindustrial waste, such as sawdust, is promising, since it gives adequate destination to these wastes, reducing the emission of pollutants (metha

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Tosterud, Susanna. "Träpellets: en växande affärsmöjlighet : Produktion av träpellets i Brasilien för export till Europa." Thesis, Högskolan i Gävle, Avdelningen för ekonomi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-13136.

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Titel: Träpellets: en växande affärsmöjlighet Produktion av träpellets i Brasilien för export till Europa Nivå: D-uppsats i ämnet företagsekonomi Författare: Susanna Tosterud Handledare: Jonas Kågström Datum: 2012 – Juni Syfte: Syftet med denna studie är att undersöka de ekonomiska förutsättningarna som finns att tillverka pellets i Brasilien för export till Europa. Metod: Studien har använt en kvalitativ metodansats där datainsamlingen för empiriavsnittet består främst av

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Michel, Johannes. "The Sustainability of Decentralized Bioenergy Production : Case Study: The 'Bioenergy Village' Bollewick." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-194437.

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The concept of Sustainable Development is an interdisciplinary science. Transcending various academic fields the concept shows paths how the needs of present and future generations can be met through economic development on a finite natural resource base. Global warming and rising sea levels are just two of a series of phenomena that are directly attributable to human-induced increasing greenhouse gas levels in the atmosphere as consequence of the combustion of fossil fuels. Therefore, reducing greenhouse gas emissions through the use of renewable resources such as bioenergy are of vital impor

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Khudur, Ivan. "Aluminium alloys ability to catalyse the oxidation of biodiesel : Development of a procedure to test alloys." Thesis, KTH, Kraft- och värmeteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215060.

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Biodiesel is a renewable and biodegradable fuel that has the possibility to replace conventional diesel fuel and reduce the environmental pollution. Despite its environmental benefits, it has been shown to cause damage to the vehicle engines, due to its oxidative properties. Different metals, such as copper, zinc and aluminium are present in the vehicle fuel system and have been shown to catalyse the oxidation of biodiesel. Several studies have been performed to investigate the interaction between these metals and fuel. However, some reports concluded contradicting results when it comes to the

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Horn, Svein Jarle. "Bioenergy from brown seaweeds." Doctoral thesis, Norwegian University of Science and Technology, Department of Biotechnology, 2000. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-547.

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<p>Brown seaweeds lack lignin and have a low cellulose content. Thus, seaweeds should be an easier material for biological degradation than land plants. However, seaweeds have a complex composition, and complete degradation of the material necessitates the presence of microorganisms with a broad substrate range. During anaerobic degradation of organic material, energy carriers such as methane and ethanol may be produced. This is a study of two particular species of brown seaweeds; <i>Laminaria hyperborea</i> and <i>Ascophyllum nodosum</i>, which are the most abundant Norwegian species and also

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Lerkkasemsan, Nuttapol. "Modeling of Bioenergy Production." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/48591.

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In this dissertation we address three different sustainability concepts: [1] modeling of biodiesel production via heterogeneous catalysis, [2] life cycle analysis for pyrolysis of switchgrass for using in power plant, and [3] modeling of pyrolysis of biomass. Thus we deal with Specific Aim 1, 2 and 3. In Specific Aim 1, the models for esterification in biodiesel production via heterogeneous catalysis were developed. The models of the reaction over the catalysts were developed in two parts. First, a kinetic study was performed using a deterministic model to develop a suitable ki

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Shahbandian, Maryam. "Building Renovation and Property Value." Thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-85137.

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The concern of climate change and Greenhouse Gas emission have increased national consideration toward energy efficiency. Despite noticeable action which have taken by EU cities and Sweden government to mitigate the climate change, there is still shortage in appropriate energy measurements in old residential buildings. Due to the fact that a large share of residential buildings in Sweden have constructed more than 40 years ago, most of them need energy renovation to enhance efficiency and saving more energy. In order to encourage home owners toward energy efficiency renovations, some cost eff

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Tandiyoputri, Gadis. "The effect of thermal pre-treatment and waste paper addition to biomethane potential of macroalgae Saccharina latissima." Thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76355.

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As a steady renewable energy technology, biogas is a viable alternative to reduce our dependency to fossil fuels and to prevent severe climate change. Biogas potential can be improved through combining different types of substrate and inoculum, as well as through substrate pre-treatments. This study aims to observe and explore the potential of macroalgae Saccharina latissima as a promising new source in renewable energy technology. The biomethane potential of macroalgae in mixture with additional substrate of mixed waste paper will be studied as a mean to improve the biogas yield. It will also

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Hjalmarsson, Louise. "Hydrolysis of waste activated sludge from pulp and paper mills : effect on dewatering properties and biogas potential by utilizing existing side streams." Thesis, Linköpings universitet, Tema Miljöförändring, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176914.

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A big challenge within pulp and paper mills is the large quantities of waste activated sludge (WAS) that is produced during the wastewater treatment. The WAS is made up of biological cells and extra polymeric substances (EPS) and can bind a large amount of water causing difficulties to dewater the WAS. This study aimed to determine how to improve the dewatering properties of the WAS by using hydrolysis. Hydrolysis will cause the cells to disrupt and the bound water in the cells and the water trapped by the EPS can be released. Specifically, this study investigated what impact hydrolysis with h

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Bäckebo, Markus. "The influence of particle size distribution on bio-coal gasification rate as related to packed beds of particles." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79084.

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This thesis is a part of a collaboration between Höganäs AB and Luleå University of Technology, aiming at replacing fossil process coal with bio-coal in their sponge iron process. The difference in gasification reactivity, i.e. reaction rate, between fossil coals and bio-coals is the major challenge in the endeavor to decrease the climate impact of the existing process. The goal of this thesis is to develop a model of reaction rate for bio-coals in relation to particle size distribution. Different particle size distributions were combined and tested to see how that affects the effective reacti

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Folquenin, Elisiane Karam Folador. "VALIDAÇÃO DAS ANÁLISES FÍSICO-QUÍMICAS EXIGIDAS PELA ANP PARA MISTURAS DIESEL – BIODIESEL." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2008. http://tede2.uepg.br/jspui/handle/prefix/2053.

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Made available in DSpace on 2017-07-24T19:37:57Z (GMT). No. of bitstreams: 1 ELISIANE_KARAM2.pdf: 586066 bytes, checksum: 73601aa55e1af89fd793a2a89fd5ed17 (MD5) Previous issue date: 2008-03-10<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The use of Biodiesel as an additive to diesel in automotive proportion of 2 % v/v is being marketed in Brazil since January 2008. Thus, it is extremely important Know the environmental and commercial impact of samples of B100 produced and mixtures, for example, B2 (stipulated by the ANP - the National Petroleum Agency). The objective thi

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Melo, Paul Lineker Amaral de. "Avaliação do sistema radicular da cana-de-açúcar (Saccharum spp.) sob diferentes quantidades de palha mantidas na superfície do solo." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-08032018-103036/.

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A colheita mecanizada da cana-de-açúcar (Saccharum spp. L.) deposita grande quantidade de palha sobre o solo, a qual é considerada uma excelente opção de matéria-prima lignocelulósica para a geração de energia. A quantidade de palha de cana-de-açúcar a ser retirada do campo e os impactos dessa prática no solo e no crescimento das plantas ainda não estão definidas. Assim, o objetivo desse estudo foi de avaliar os efeitos da remoção da palha de cana-de-açúcar do campo para fins energéticos na massa e arquitetura do sistema radicular e, sua relação com a produtividade da cultura. O experimento fo

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