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ABSCHATZUNG DES UNTERNEHMERISCHEN RISIKOS BEIM BETRIEB EINER BIOGASANLAGE MIT HILFE DER MONTECARLO-METHODE (German) AgEcon
Rauh, Stefan; Berenz, Stefan; Heissenhuber, Alois.
Die Novellierung des Gesetzes für den Vorrang Erneuerbarer Energien (EEG) führte zu einem verstärkten Einstieg von Landwirten in die Biogasproduktion. Jedoch können die mit dem EEG verbundenen relativ hohen Vergütungssätze das vorhandene Investitionsrisiko in einer Biogasanlage nicht eliminieren. Es existiert eine gewisse Zahl an Einflussfaktoren, welche die Wirtschaftlichkeit nachhaltig beeinflussen. Eine Risikoanalyse mittels der Monte-Carlo- Methode zeigt den enormen Einfluss der Risikofaktoren auf die Varianz des Gewinns. Es wird dadurch deutlich, dass eine statische Planungsrechnung, welche Unsicherheit nicht berücksichtigt, oftmals zu einer Fehleinschätzung führen kann. Gleichzeitig gelingt es mit Hilfe einer Monte-Carlo-Simulation die größten...
Tipo: Conference Paper or Presentation Palavras-chave: Monte-Carlo-Simulation; Risikoanalyse; Wirtschaftlichkeit; Biogas.
Ano: 2007 URL: http://purl.umn.edu/7588
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Anaerobic bio-digestion of concentrate obtained in the process of ultra filtration of effluents from tilapia processing unit R. Bras. Zootec.
Souza,Milena Alves de; Chaguri,Milena Penteado; Castelini,Fabrício Rogério; Lucas Junior,Jorge de; Vidotti,Rose Meire.
The objective of the present study was to evaluate the efficiency of the process of biodigestion of the protein concentrate resulting from the ultrafiltration of the effluent from a slaughterhouse freezer of Nile tilapia. Bench digesters were used with excrements and water (control) in comparison with a mixture of cattle manure and effluent from the stages of filleting and bleeding of tilapias. The effluent obtained in the continuous process (bleeding + filleting) was the one with highest accumulated population from the 37th day, as well as greatest daily production. Gases composition did not differ between the protein concentrates, but the gas obtained with the use of the effluent from the filleting stage presented highest methane gas average (78.05%) in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Bleeding; Filleting; Freshwater-fish; Methane.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200002
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Anaerobic biodigestion of manure from finishing pig supplemented with ractopamine over different periods REA
Santos,Tânia M. B. dos; Trevizan,Paula S. F.; Xavier,Cristiane A. N.; Kiefer,Charles; Ferraz,André L. J..
ABSTRACT This study aimed to evaluate the efficiency of anaerobic digestion and biogas production by manure from pig supplemented with ractopamine over different periods. We used manure of 50 finishing pigs according to the following diets: without supplementation and supplemented with 20-ppm ractopamine during 7, 14, 21, 28 and 35 days pre-slaughter. Continuous bench biodigesters were used in the experiment. We measured biogas production and made analyses of total (TS) and volatile solids (VS), pH, total phosphorus (total P), total nitrogen (total N) and ammoniacal nitrogen (ammoniacal N) in samples of manure, affluent and effluent from biodigesters. The pH and ammoniacal N as indicator parameters of the process balance and stability were satisfactory....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Β-adrenergic; Biogas; Ractopamine hydrochloride; Environmental impact and nutrient partitioning.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000300399
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Anaerobic biodigestion of pigs feces in the initial, growing and finishing stages fed with diets formulated with corn or sorghum REA
Miranda,Adélia P.; Lucas Junior,Jorge de; Thomaz,Maria C.; Pereira,Gener T.; Fukayama,Ellen H..
The objective of this study was to evaluate the quality and the production of biogas and biofertilizer obtained from biodigester supplied with pig feces in the initial, growing and finishing stages, fed with diets formulated based on corn or sorghum. Twenty bench biodigesters were used with hydraulic retention time of 30 days and daily loads that contained 4 to 6% of total solids (TS) and 3.6 to 5.2% of volatile solids (VS). In the effluent of the biodigesters, mean levels of TS were observed ranging between 1.6 and 2.0% and of VS between 1.2 and 1.6%. The mean reductions of TS were 57.7 to 64.7% and of VS from 61.7 to 69.0%, and there was only difference in the finishing phase, in which the major averages reductions were produced by the biodigesters...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodigesters; Biogas; Pig feces; Environmental impact.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100006
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Anaerobic co-digestion of animal manure at different waste cooking oil concentrations Ciência Rural
Sunada,Natália da Silva; Orrico,Ana Carolina Amorim; Orrico Junior,Marco Antonio Previdelli; Lucas Junior,Jorge de; Lopes,Walter Renato Teixeira; Schwingel,Alice Watte.
ABSTRACT: This study aimed to obtain the best dose of waste cooking oil inclusion for the co-digestion of substrates prepared with dairy cattle and swine manure in order to maximize solids reductions and biogas yield. Analyses of total solids (TS), volatile solids (VS), and neutral detergent fiber (NDF) were performed during the loading and unloading of digesters, while biogas yield was measured twice a week. The maximum reduction in VS (51.4%) was reached with the inclusion of up to 54.6g waste cooking oil.kg manure-1. Maximum NDF degradation occurred with inclusions of up to 69.4g waste cooking oil.kg manure-1. Inclusions of up to 64g of waste cooking oil.kg manure-1 provided specific biogas yield of 291.4 and 251.0L biogas.kg VS-1 added to substrates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestion; Biogas; Energy recycling.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000700351
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Anaerobic co-digestion of crude glycerin and starch industry effluent REA
Larsen,Andrea C.; Gomes,Benedito M.; Gomes,Simone D.; Zenatti,Dilcemara C.; Torres,Douglas G. B..
The Brazil's Biodiesel Production and Use Program introduces biodiesel in the Brazilian energy matrix, bringing along the perspective of a growth of the glycerin offer, co-product generated in the proportion of 10 kg for each 100 L of biodiesel. The aim of this study was to evaluate the addition of crude glycerin in the anaerobic digestion of cassava starch industry effluent (cassava wastewater), in a horizontal semi-continuous flow reactor of one phase in laboratory scale. It was used a reactor with a 8.77 L of useful volume, a medium support for corrugated conduit of polyvinyl chloride (PVC), temperature of 261 ºC, fed with cassava wastewater and glycerin, with hydraulic detention times of 4 and 5 days and increasing volumetric organic load of 3.05;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cassava wastewater; Biodiesel; Biogas; Glycerol.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200013
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Anaerobic co-digestion of hatchery waste and wastewater to produce energy and biofertilizer - Batch phase AGRIAMBI
Matter,Juliana M.; Costa,Mônica S. S. de M.; Costa,Luiz A. de M.; Pereira,Dercio C.; Varennes,Amarílis de; Tessaro,Dinéia.
ABSTRACT Aiming to evaluate different wastewaters in the anaerobic co-digestion (ACoD) of hatchery wastes, a batch test was conducted in bench horizontal digesters. At the end of the process, the potential production of biogas and methane was calculated as well as the chemical composition (macro- and micronutrients) of the effluent and the concentrations of methane and carbon dioxide gas at 60 days. The monitoring of the process included observations of the reduction of the organic carbon, chemical oxygen demand, and total (TS) and volatile solids (VS), as well as the variation of pH and electrical conductivity (EC). The results showed that the mixing between the hatchery fresh waste and swine wastewater (T4) and among fresh hatchery waste, water from the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Methane; Swine wastewater; Slaughterhouse wastewater.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900651
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ANAEROBIC DIGESTION AND CO-DIGESTION OF POULTRY LITTER SUBMITTED TO DIFFERENT REUSES REA
Vicente Jr.,Donizete J.; Costa,Monica S. S. de M.; Costa,Luiz A. M.; Pereira,Dercio C.; Santos,Francielly T. dos.
ABSTRACT Considering the constant increase in the waste generation from poultry and pigs’ husbandries, the main contributions of this study were to verify the potential of biogas production through the anaerobic digestion and co-digestion of the residues generated by these two activities, as well as to highlight the recovery of the nutrients contained in the obtained digestate. The wastes used were poultry litters after six, seven and eight production lots, as well as the sifted wastewater from one Piglets Producer Unit (PPU). Higher biogas production (p <0.05) was observed in the treatments in which anaerobic codigestion was used with the swine wastewater (SW): 0.179; 0.158 and 0.117 m3 per kg of total solids (TS) added for poultry litters with six,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroindustry; Digestate; Biogas; Waste treatments.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600961
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Assessment of hydrogen sulfide removal from biogas using a field scale anoxic biotrickling filter. Repositório Alice
PIROLLI, M.; SILVA, M. L. B. da; MEZZARI, M. P.; MICHELON, W.; PRANDINI, J. M.; SOARES, H. M..
Hydrogen sulphide is one of the most toxic and corrosive compound present in swine-derived biogas streams.In this study, afield scale biotrickling filter for the removal of hydrogen sulfide was investigated.A Biofilter packed with supporting biofilm materials was fed continuously with a proprietary nutrient solution and operatedfor over 73days. The system has been operating with a H2S inlet concentrations ranging from 1,000to 3,000 ppm.Significant removal efficiencies >95% was demonstrated. pH of the stock feeding solution decreased from 6.2 to as low as 3.5within couple days.The resulting drop in pH provided circumstantial evidence to support biological H2 Soxidation to sulphuric acid by sulfide-oxidizers. Sulfur precipitation was also observed to...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Biogas; Biotrickling filter; Hydrogen sulfide; Desulfurization.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1045503
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AUSWIRKUNGEN DER NOVELLIERUNG DES ERNEUERBARE ENERGIEN-GESETZES AUF DIE LANDWIRTSCHAFT IN DEUTSCHLAND AgEcon
Goemann, Horst; Kreins, Peter; Muench, Julia; Delzeit, Ruth.
A2_2
Tipo: Conference Paper or Presentation Palavras-chave: Erneuerbare-Energien-Gesetz; EEG 2009; Energiemais; Agrarsektormodell; Landnutzung. RAUMIS; Gülle; Biogas; Gülle-Bonus; Agricultural and Food Policy; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/93936
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Biogas and Biomass Implementation in Rural Areas BABT
Sandim,Álvaro A.; Batista,Alexandre G.; Bareta,Maria Luiza E.; Betini,Roberto C.; Pepplow,Luiz Amilton.
Abstract Advances in energy demand in rural areas cannot be dissociated from agricultural modernization, large estates, mechanization of labor and reduced investment in small production. The use of biogas together with biomass are the most cost-effective ways for the small producer, as it has a high calorific value. In the case of biogas the procedure is performed by combining a compressor and a chiller, allowing the gas enter the reactor and burn together with the air stream. The use of these techniques is an auxiliary way to reduce the cost of the producer to produce a certain crop, besides allowing a participation in the final energy supply, so that the utilities have an alternative to distribute the surplus energy to another region, serving thus a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Biomass; Rural areas; Electricity.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000200201
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Biogas, energia do meio rural para o meio rural. Infoteca-e
ALENCAR, J.de..
1981
Tipo: Folderes / Folhetos / Cartilhas (INFOTECA-E) Palavras-chave: Biogas; Biodigestores; Energia rural; Rural energy.
Ano: 1981 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/581265
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Biogás: independencia energetica do Pantanal Mato-Grossense. Infoteca-e
COMASTRI FILHO, J. A..
A crise de energia, provocada pelos sucessivos aumentos nos precos do petroleo, fez com que o Governo Brasileiro desse maior atencao a producao de biogas, que nas areas rurais podera rapidamente permitir a auto-suficiencia energetica, devido a existencia de grande quantidade de residuos organicos, para a utilizacao em biodigestores. A regiao do Pantanal Mato-Grossense oferece condicoes excepcionais para um arrojado plano de utilizacao de energia proveniente da fermentacao de biomassa. A utilizacao de energia do biogas, nesta regiao, e muito favorecida em virtude das condicoes climaticas e da abundancia de excrementos bovinos, abrindo uma perspectiva favoravel a sua aplicacao no sentido de se obter energia a custo relativamente baixos, atraves de unidades...
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Biodigestor; Construcao; Instalacao; Energia; Biogas; Pantanal; Methane digesters; Production; Energy.
Ano: 1981 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/787706
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BIOGAS PRODUCTION IN DAIRY CATTLE SYSTEMS, USING BATCH DIGESTERS WITH AND WITHOUT SOLIDS SEPARATION IN THE SUBSTRATES REA
Anjos,Isis Dos; Toneli,Juliana T. C. L.; Sagula,Alex L.; Lucas Junior,Jorge de.
ABSTRACT This research aimed to evaluate the biogas production during the anaerobic biodigestion process of dairy cattle manure, with and without solids separation. Sixteen biodigesters of the batch type were used, each one with 2L of capacity, supplied with manure in four different conditions: (1) pure manure, after washing the floors of the free stall system; (2) manure after the solids separator; (3) manure after the solids separator and sand decanter and (4) manure with the solid retained in separator solids, dissolved in water. The hydraulic retention time was of 196 days. The highest reductions of volatile solids (VS) were obtained for the biodigesters supplied with manure that went through some process of solids separation. The highest potential of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Biodigester; Manure; Dairy cattle; Solid separation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300426
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Biomethane production from vinasse in upflow anaerobic sludge blanket reactors inoculated with granular sludge BJM
Barros,Valciney Gomes de; Duda,Rose Maria; Oliveira,Roberto Alves de.
ABSTRACT The main objective of this study was to evaluate the anaerobic conversion of vinasse into biomethane with gradual increase in organic loading rate (OLR) in two upflow anaerobic sludge blanket (UASB) reactors, R1 and R2, with volumes of 40.5 and 21.5 L in the mesophilic temperature range. The UASB reactors were operated for 230 days with a hydraulic detection time (HDT) of 2.8 d (R1) and 2.8-1.8 d (R2). The OLR values applied in the reactors were 0.2-7.5 g totalCOD (L d)−1 in R1 and 0.2-11.5 g totalCOD (L d)−1 in R2. The average total chemical oxygen demand (totalCOD) removal efficiencies ranged from 49% to 82% and the average conversion efficiencies of the removed totalCOD into methane were 48-58% in R1 and 39-65% in R2. The effluent recirculation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Mesophilic anaerobic treatment; Methane; Organic loading rate; Startup.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000300628
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Cassava starch extraction effluent treatment in a one phase tubular horizontal pilot reactor with support medium REA
Kuczman,Osvaldo; Tavares,Maria H. F.; Gomes,Simone D.; Guedes,Luciana P. C.; Grisotti,Geovane.
The cassava starch industries generate a large volume of wastewater effluent that, stabilized in ponds, wastes its biogas energy and pollutes the atmosphere. To contribute with the reversion of this reality, this manipueira treatment research was developed in one phase anaerobic horizontal pilot reactor with support medium in bamboo pieces. The reactor was excavated into the ground and sealed with geomembrane in HDPE, having a volume equal to 33.6 m³ and continuous feeding by gravity. The stability indicators were pH, volatile acidity/total alkalinity ratio and biogas production. The statistical analyses were performed by a completely randomized design, with answers submitted to multivariate analysis. The organical loads in COD were 0.556; 0.670; 0.678 and...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Biodigester; Biogas; Anaerobic digestion; Cassava; Cassava wastewater.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600021
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Cassava wastewater (manipueira) treatment using a two-phase anaerobic biodigestor Ciênc. Tecnol. Aliment.
BARANA,Ana Cláudia; CEREDA,Marney Pascoli.
A two-phase anaerobic biodigestor was employed in order to analyze methane production with different manipueira organic loading rates. The acidogenic phase was carried out in a batch process whereas the methanogenic in an up-flow anaerobic fixed bed reactor with continuous feeding. The organic loading rates varied from 0.33 up to 8.48g of Chemical Demand Oxygen (COD)/L.day. The highest content of methane, 80.9%, was obtained with organic loading rate of 0.33g and the lowest, 56.8%, with 8.48gCOD/L.d. The highest reduction of COD, 88.89%, was obtained with organic loading rate of 2.25g and the lowest, 54.95%, with 8.48gCOD/L.d. From these data it was possible to realize that anaerobic biodigestion can be managed in at least two ways, i.e., for energy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anaerobic biodigestion; Biogas; Wastewater; Cassava; Methane.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612000000200010
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Cellulase effect on anaerobic digestion of maize silage under discontinuous operation REA
Oliva-Merencio,Deny; Pereda-Reyes,Ileana; Schimpf,Ulrike; Koehler,Stefan; Silva,Ariovaldo J. da.
ABSTRACT This paper studied the effect of adding an enzyme (ellulose) on anaerobic digestion of maize silage. We compared materials at chopping lengths of 8 mm (MSL), 4mm (MSS) and natural size (Ms) under a mesophilic and discontinuous operation (batch process). Hence, we found the process to be significantly influenced by particle size. Moreover, the ellulose addition did not significantly impact biogas production after a 35-day digestion period. Ms and MSS displayed an improved response to all variables when compared with MSL and MSL+C, with significant differences. Studies on the refractory fraction at infinite time (R0) have demonstrated that the lowest values correspond to Ms and MSS (0.122 and 0.155, respectively). The Kinetic approach and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ellulose; Silage; Biogas; Kinetics; Biodegradability.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000500951
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CO2-VERMEIDUNGSKOSTEN DER STROM- UND WÄRMEPRODUKTION AUS BIOGAS AgEcon
Scholz, Lukas; Meyer-Aurich, Andreas; Kirschke, Dieter.
In einer Studie wurden die volkswirtschaftlichen Kosten verschiedener Produktionsverfahren und Szenarien der Strom- und Wärmeproduktion aus Biogas auf der Basis von Mais und Rindergülle untersucht. Gemessen an alternativen Maßnahmen, verursacht die staatliche Förderung der Bioenergieproduktion aus Biogas, durch das Erneuerbare-Energien-Gesetz (EEG), hohe volkswirtschaftliche Kosten. Die CO2-Vermeidungkosten variieren zwischen 289 und 691 €/t CO2äq in den untersuchten Produktionsverfahren und Szenarien. Der Subventionsaufwand beläuft sich auf 310 bis 596 €/t CO2äq.
Tipo: Conference Paper or Presentation Palavras-chave: Bioenergie; Biogas; Ökonomische Analyse; CO2-Vermeidungskosten; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Financial Economics.
Ano: 2011 URL: http://purl.umn.edu/114736
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Co-digestion of swine excreta associated with increasing levels of crude glycerin R. Bras. Zootec.
Orrico Junior,Marco Antonio Previdelli; Schwingel,Alice Watte; Centurion,Stanley Ribeiro; Orrico,Ana Carolina Amorim.
ABSTRACT The objective of this research was to evaluate the performance of anaerobic co-digestion of swine excreta associated with increasing doses of crude glycerin and different hydraulic retention times (HRT). A completely randomized design was adopted in a 3 × 4 factorial arrangement composed of three HRT (10, 17, and 24 days) and four crude glycerin doses (0, 5, 10, and 15 g/100 g of total solids [TS]), with four replications per treatment. The assessed parameters were: biogas production potential, reductions of volatile solids (VS), chemical oxygen demand (COD), and most probable number of total and thermotolerant coliforms. The biogas production per added VS presented quadratic effect at 17 and 24 days of HRT, with ideal doses of 5.5 and 5.9 g of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiesel; Biogas; Manure; Waste.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000300101
Registros recuperados: 67
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