Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações do UNIOESTE |
Texto Completo: | http://tede.unioeste.br/handle/tede/3912 |
Resumo: | Cassava starch industries have produced wastewater, which is their main environmental problem. Therefore, two-phase anaerobic digestion systems represent a newsworthy treatment alternative due to their efficiency in organic load removal and biogas production capacity. Thus, this study aimed at evaluating methane production from cassava starch wastewater in a sequential batch biofilm reactor (AnSBBR) as part of a two-phase system. The evaluation was composed of two main parts: i) analysis of a methanogenic reactor performance according to the increasing organic loads; and ii) the economic availability analysis regarding the reactor scaling-up for industrial scale. In the first part of this study, some previously acidified cassava starch wastewater was used to feed a methanogenic AnSBBR reactor on laboratory scale. The reactor has been submitted to increasing applied organic volumetric loads from 3.7 to 12.0 g COD.L-1.d-1, which were established by variation between affluent concentration and cycle time of a sequential batch reactor. The affluent concentration ranged from 2.8; 4.1 and 6.0 g COD-L-1, in sequential batches with cycle time of 6, 8 and 12 hours. The reactor was carried out at 30±1oC; it was stirred by a liquid phase recirculation and has been filled with support medium composed of polyurethane foam. The results of this first stage have shown that there was an increase in the organic loading rate (OLR) due to an increase on the affluent concentration and, mainly, a decrease on the cycle time duration showed an affect on the reactor performance. Methane productivity increased due to the increase in OLR and has reached 2.7 L CH4 L-1d-1 at OLR 12.0 g COD-L-1.d-1. COD removal has also been affected by OLR increase and ranged from 94 to 60%. And, the lowest values of COD removal were ascribed to the shortest cycle times. All the experimental conditions were constant. In the second part of this study, a two-phase anaerobic digestion system was designed on an industrial scale, based on the results previously obtained. Finally, an economic feasibility analysis was developed to settle down this project, which considered a twenty-year useful life term. The results of the second phase evinced that the simple payback was 8.4 years and the discounted payback was 15.9 years. Thus, it was recorded that this project can bring forth a profit similar to the net present value (R$ 1.9 million) at the end of the project lifetime, while internal rate of return was calculated in 11.1%. These results indicated that the two-stage system is economically viable to produce methane from starch wastewater. |
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Gomes, Simone Damascenohttp://lattes.cnpq.br/3362104483832351Sanchez, Felipe Enghttp://lattes.cnpq.br/1457673672317526Fuess, Lucas Tadeuhttp://lattes.cnpq.br/2310904305639447Sene, Lucianehttp://lattes.cnpq.br/2582084888410031Tavares, Maria Hermínia Ferreirahttp://lattes.cnpq.br/4169267827878056http://lattes.cnpq.br/5940399467829427Mari, Angelo Gabriel2018-09-06T14:03:20Z2018-01-31MARI, Angelo Gabriel. Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica. 2018. 115 f. Tese (Doutorado - Programa de Pós-Graduação em Engenharia Agrícola) - Universidade Estadual do Oeste do Paraná, Cascavel, 2018.http://tede.unioeste.br/handle/tede/3912Cassava starch industries have produced wastewater, which is their main environmental problem. Therefore, two-phase anaerobic digestion systems represent a newsworthy treatment alternative due to their efficiency in organic load removal and biogas production capacity. Thus, this study aimed at evaluating methane production from cassava starch wastewater in a sequential batch biofilm reactor (AnSBBR) as part of a two-phase system. The evaluation was composed of two main parts: i) analysis of a methanogenic reactor performance according to the increasing organic loads; and ii) the economic availability analysis regarding the reactor scaling-up for industrial scale. In the first part of this study, some previously acidified cassava starch wastewater was used to feed a methanogenic AnSBBR reactor on laboratory scale. The reactor has been submitted to increasing applied organic volumetric loads from 3.7 to 12.0 g COD.L-1.d-1, which were established by variation between affluent concentration and cycle time of a sequential batch reactor. The affluent concentration ranged from 2.8; 4.1 and 6.0 g COD-L-1, in sequential batches with cycle time of 6, 8 and 12 hours. The reactor was carried out at 30±1oC; it was stirred by a liquid phase recirculation and has been filled with support medium composed of polyurethane foam. The results of this first stage have shown that there was an increase in the organic loading rate (OLR) due to an increase on the affluent concentration and, mainly, a decrease on the cycle time duration showed an affect on the reactor performance. Methane productivity increased due to the increase in OLR and has reached 2.7 L CH4 L-1d-1 at OLR 12.0 g COD-L-1.d-1. COD removal has also been affected by OLR increase and ranged from 94 to 60%. And, the lowest values of COD removal were ascribed to the shortest cycle times. All the experimental conditions were constant. In the second part of this study, a two-phase anaerobic digestion system was designed on an industrial scale, based on the results previously obtained. Finally, an economic feasibility analysis was developed to settle down this project, which considered a twenty-year useful life term. The results of the second phase evinced that the simple payback was 8.4 years and the discounted payback was 15.9 years. Thus, it was recorded that this project can bring forth a profit similar to the net present value (R$ 1.9 million) at the end of the project lifetime, while internal rate of return was calculated in 11.1%. These results indicated that the two-stage system is economically viable to produce methane from starch wastewater.As indústrias de produção de fécula de mandioca têm nas águas residuárias seu principal passivo ambiental, e o sistema de digestão anaeróbia em duas fases representa uma alternativa relevante de tratamento, devido à eficiência em remover a carga orgânica e a capacidade de produção de biogás. Assim, este estudo teve como objetivo avaliar a produção de metano a partir de água residuária de fecularia em um reator em batelada sequencial com biomassa imobilizada (AnSBBR) como parte de um sistema em duas fases. A avaliação desenvolvida foi composta por duas partes principais: i) análise do desempenho do reator metanogênico em função de cargas orgânicas crescentes; ii) análise de viabilidade econômica da ampliação do reator para a escala industrial. Na primeira parte do estudo, utilizou-se água residuária de fecularia previamente acidificada para abastecer um reator AnSBBR metanogênico em escala de laboratório. O reator foi submetido a cargas orgânicas volumétricas aplicadas (COVa) de 3,7 a 12,0 g DQO L-1d-1, estabelecidas pela variação entre a concentração do afluente e o tempo de ciclo do reator em batelada sequencial. As faixas de concentração testadas foram de 2,8; 4,1 e 6,0 g DQO.L-1, em bateladas sequenciais com tempos de ciclo de 6, 8 e 12 horas. O reator foi operado na temperatura de 30±1 oC, e contou com agitação por recirculação da fase líquida e meio suporte composto por espuma de poliuretano. Os resultados da primeira etapa demonstraram que o aumento da carga orgânica volumétrica pelo incremento da concentração do afluente e, principalmente, pela redução do tempo de ciclo, influenciou no desempenho do reator. A produtividade de metano aumentou com o acréscimo da COVa e atingiu 2,7 LCH4 L-1d-1 na COVa de 12,0 g DQO L-1d-1. A remoção de DQO também foi afetada pelo aumento da COVa, tendo variado de 94 e 60%, logo, os menores valores de remoção de DQO são atribuídos aos menores tempos de ciclo. Todas as condições experimentais se mostraram estáveis. Na segunda parte do estudo, dimensionou-se um sistema de digestão anaeróbia em duas fases em escala industrial, a partir dos resultados obtidos anteriormente. Por fim, foi desenvolvida uma análise de viabilidade econômica da implantação do projeto, que considerou um período de vida útil de vinte anos. Os resultados da segunda etapa demonstraram que o payback simples foi de 8,4 anos e o payback descontado de 15,9 anos. Ao final do tempo de vida útil, o projeto gerou lucro igual ao valor presente líquido de R$ 1,89 milhão e a taxa interna de retorno foi de 11,1%. Os resultados indicaram que o sistema em duas fases para a produção de metano a partir de água residuária de fecularia é economicamente viável.Submitted by Neusa Fagundes (neusa.fagundes@unioeste.br) on 2018-09-06T14:03:20Z No. of bitstreams: 2 Angelo_Mari2018.pdf: 2243304 bytes, checksum: 694a2b64869c2cc929922f0f08581cd4 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2018-09-06T14:03:20Z (GMT). No. of bitstreams: 2 Angelo_Mari2018.pdf: 2243304 bytes, checksum: 694a2b64869c2cc929922f0f08581cd4 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-01-31Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfpor6588633818200016417500Universidade Estadual do Oeste do ParanáCascavelPrograma de Pós-Graduação em Engenharia AgrícolaUNIOESTEBrasilCentro de Ciências Exatas e Tecnológicashttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessBiogásBiohidrogênioDigestão anaeróbiaViabilidade econômicaBiogasBiohydrogenAnaerobic digestioneconomic viability analysisCIENCIAS AGRARIAS::ENGENHARIA AGRICOLAProdução de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômicaMethane production in AnSBBR reactor from previously acidified cassava starch wastewater: performance and economic viabilityinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis-5347692450416052129600600600600221437444286838201591854457215887615552075167498588264571reponame:Biblioteca Digital de Teses e Dissertações do UNIOESTEinstname:Universidade Estadual do Oeste do Paraná (UNIOESTE)instacron:UNIOESTEORIGINALAngelo_Mari2018.pdfAngelo_Mari2018.pdfapplication/pdf2243304http://tede.unioeste.br:8080/tede/bitstream/tede/3912/5/Angelo_Mari2018.pdf694a2b64869c2cc929922f0f08581cd4MD55CC-LICENSElicense_urllicense_urltext/plain; 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dc.title.por.fl_str_mv |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica |
dc.title.alternative.eng.fl_str_mv |
Methane production in AnSBBR reactor from previously acidified cassava starch wastewater: performance and economic viability |
title |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica |
spellingShingle |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica Mari, Angelo Gabriel Biogás Biohidrogênio Digestão anaeróbia Viabilidade econômica Biogas Biohydrogen Anaerobic digestion economic viability analysis CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
title_short |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica |
title_full |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica |
title_fullStr |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica |
title_full_unstemmed |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica |
title_sort |
Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica |
author |
Mari, Angelo Gabriel |
author_facet |
Mari, Angelo Gabriel |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Gomes, Simone Damasceno |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/3362104483832351 |
dc.contributor.referee1.fl_str_mv |
Sanchez, Felipe Eng |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/1457673672317526 |
dc.contributor.referee2.fl_str_mv |
Fuess, Lucas Tadeu |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/2310904305639447 |
dc.contributor.referee3.fl_str_mv |
Sene, Luciane |
dc.contributor.referee3Lattes.fl_str_mv |
http://lattes.cnpq.br/2582084888410031 |
dc.contributor.referee4.fl_str_mv |
Tavares, Maria Hermínia Ferreira |
dc.contributor.referee4Lattes.fl_str_mv |
http://lattes.cnpq.br/4169267827878056 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/5940399467829427 |
dc.contributor.author.fl_str_mv |
Mari, Angelo Gabriel |
contributor_str_mv |
Gomes, Simone Damasceno Sanchez, Felipe Eng Fuess, Lucas Tadeu Sene, Luciane Tavares, Maria Hermínia Ferreira |
dc.subject.por.fl_str_mv |
Biogás Biohidrogênio Digestão anaeróbia Viabilidade econômica |
topic |
Biogás Biohidrogênio Digestão anaeróbia Viabilidade econômica Biogas Biohydrogen Anaerobic digestion economic viability analysis CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
dc.subject.eng.fl_str_mv |
Biogas Biohydrogen Anaerobic digestion economic viability analysis |
dc.subject.cnpq.fl_str_mv |
CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
description |
Cassava starch industries have produced wastewater, which is their main environmental problem. Therefore, two-phase anaerobic digestion systems represent a newsworthy treatment alternative due to their efficiency in organic load removal and biogas production capacity. Thus, this study aimed at evaluating methane production from cassava starch wastewater in a sequential batch biofilm reactor (AnSBBR) as part of a two-phase system. The evaluation was composed of two main parts: i) analysis of a methanogenic reactor performance according to the increasing organic loads; and ii) the economic availability analysis regarding the reactor scaling-up for industrial scale. In the first part of this study, some previously acidified cassava starch wastewater was used to feed a methanogenic AnSBBR reactor on laboratory scale. The reactor has been submitted to increasing applied organic volumetric loads from 3.7 to 12.0 g COD.L-1.d-1, which were established by variation between affluent concentration and cycle time of a sequential batch reactor. The affluent concentration ranged from 2.8; 4.1 and 6.0 g COD-L-1, in sequential batches with cycle time of 6, 8 and 12 hours. The reactor was carried out at 30±1oC; it was stirred by a liquid phase recirculation and has been filled with support medium composed of polyurethane foam. The results of this first stage have shown that there was an increase in the organic loading rate (OLR) due to an increase on the affluent concentration and, mainly, a decrease on the cycle time duration showed an affect on the reactor performance. Methane productivity increased due to the increase in OLR and has reached 2.7 L CH4 L-1d-1 at OLR 12.0 g COD-L-1.d-1. COD removal has also been affected by OLR increase and ranged from 94 to 60%. And, the lowest values of COD removal were ascribed to the shortest cycle times. All the experimental conditions were constant. In the second part of this study, a two-phase anaerobic digestion system was designed on an industrial scale, based on the results previously obtained. Finally, an economic feasibility analysis was developed to settle down this project, which considered a twenty-year useful life term. The results of the second phase evinced that the simple payback was 8.4 years and the discounted payback was 15.9 years. Thus, it was recorded that this project can bring forth a profit similar to the net present value (R$ 1.9 million) at the end of the project lifetime, while internal rate of return was calculated in 11.1%. These results indicated that the two-stage system is economically viable to produce methane from starch wastewater. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-09-06T14:03:20Z |
dc.date.issued.fl_str_mv |
2018-01-31 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MARI, Angelo Gabriel. Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica. 2018. 115 f. Tese (Doutorado - Programa de Pós-Graduação em Engenharia Agrícola) - Universidade Estadual do Oeste do Paraná, Cascavel, 2018. |
dc.identifier.uri.fl_str_mv |
http://tede.unioeste.br/handle/tede/3912 |
identifier_str_mv |
MARI, Angelo Gabriel. Produção de metano em reator AnSBBR a partir de efluente de fecularia previamente acidificado: desempenho e viabilidade econômica. 2018. 115 f. Tese (Doutorado - Programa de Pós-Graduação em Engenharia Agrícola) - Universidade Estadual do Oeste do Paraná, Cascavel, 2018. |
url |
http://tede.unioeste.br/handle/tede/3912 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
-5347692450416052129 |
dc.relation.confidence.fl_str_mv |
600 600 600 600 |
dc.relation.department.fl_str_mv |
2214374442868382015 |
dc.relation.cnpq.fl_str_mv |
9185445721588761555 |
dc.relation.sponsorship.fl_str_mv |
2075167498588264571 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
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Universidade Estadual do Oeste do Paraná Cascavel |
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Programa de Pós-Graduação em Engenharia Agrícola |
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UNIOESTE |
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Brasil |
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Centro de Ciências Exatas e Tecnológicas |
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Universidade Estadual do Oeste do Paraná Cascavel |
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Universidade Estadual do Oeste do Paraná (UNIOESTE) |
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UNIOESTE |
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UNIOESTE |
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Biblioteca Digital de Teses e Dissertações do UNIOESTE |
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Biblioteca Digital de Teses e Dissertações do UNIOESTE |
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Biblioteca Digital de Teses e Dissertações do UNIOESTE - Universidade Estadual do Oeste do Paraná (UNIOESTE) |
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biblioteca.repositorio@unioeste.br |
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