Exploring optimal environmental factors for fermentative hydrogen production from starch using mixed anaerobic microflora

Lee, Kuo Shing; Hsu, Yao Feng; Lo, Yung Chung; Lin, Peng; Lin, Ching-Nan; Chang, Jo Shu

doi:10.1016/j.ijhydene.2007.10.019

Cited by 148 publications

(59 citation statements)

References 17 publications

(35 reference statements)

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“…In order to achieve maximum hydrogen production, there was a need to provide suitable fermentation conditions, especially the environmental factors such as temperature, pH, nutrient addition, buffer, substrate concentration and ferrous iron. The appropriate concentration of substrate could enhance bacterial growth and activity [9]. An excessive substrate concentration can cause a build-up of volatile fatty acid (VFAs) in the fermentation broth, leading to a low pH in the system.…”

Section: Introductionmentioning

confidence: 99%

Bio-Hydrogen Production from Pineapple Waste Extract by Anaerobic Mixed Cultures

Reungsang

Sreela-or

2013

Energies

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A statistical experimental design was employed to optimize factors that affect the production of hydrogen from the glucose contained in pineapple waste extract by anaerobic mixed cultures. Results from Plackett-Burman design indicated that substrate concentration, initial pH and FeSO 4 concentration had a statistically significant (p ≤ 0.05) influence on the hydrogen production potential (P s ) and the specific hydrogen production rate (SHPR). The path of steepest ascent was undertaken to approach the optimal region of these three significant factors which was then optimized using response surface methodology (RSM) with central composite design (CCD). The presence of a substrate concentration of 25.76 g-total sugar/L, initial pH of 5.56, and FeSO 4 concentration of 0.81 g/L gave a maximum predicted P s of 5489 mL H 2 /L, hydrogen yield of 1.83 mol H 2 /mol glucose, and SHPR of 77.31 mL H 2 /g-volatile suspended solid (VSS) h. A verification experiment indicated highly reproducible results with the observed P s and SHPR being only 1.13% and 1.14% different from the predicted values.

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Section: Introductionmentioning

confidence: 99%

Bio-Hydrogen Production from Pineapple Waste Extract by Anaerobic Mixed Cultures

Reungsang

Sreela-or

2013

Energies

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“…Of course, reactor confi guration and mode of operation will affect the composition of the microbial consortia, as suggested by a recent study on hydrogen production from chemical wastewater in a biofi lm confi gured reactor operated in periodic discontinuous batch mode [66]. Thus, microbial consortia have been shown to be capable of producing hydrogen, with various yields, from a variety of substrates, including; probiotic wastewater [67], dairy wastewater [68], and heat-treated cassava starch [69], to name only a few recent examples (more are given in the next section). Of course, hydrogen amounts are highly dependent upon the composition of the substrate and carbohydrate rich materials will give higher yields.…”

Section: Preparation and Properties Of Mixed Microbial Consortiamentioning

confidence: 99%

Microbiological and engineering aspects of biohydrogen production

et al. 2009

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Dramatically rising oil prices and increasing awareness of the dire environmental consequences of fossil fuel use, including startling effects of climate change, are refocusing attention worldwide on the search for alternative fuels. Hydrogen is poised to become an important future energy carrier. Renewable hydrogen production is pivotal in making it a truly sustainable replacement for fossil fuels, and for realizing its full potential in reducing greenhouse gas emissions. One attractive option is to produce hydrogen through microbial fermentation. This process would use readily available wastes as well as presently unutilized bioresources, including enormous supplies of agricultural and forestry wastes. These potential energy sources are currently not well exploited, and in addition, pose environmental problems. However, fuels are relatively low value products, placing severe constraints on any production process. Therefore, means must be sought to maximize yields and rates of hydrogen production while at the same time minimizing energy and capital inputs to the bioprocess. Here we review the various attributes of the characterized hydrogen producing bacteria as well as the preparation and properties of mixed microfl ora that have been shown to convert various substrates to hydrogen. Factors affecting yields and rates are highlighted and some avenues for increasing these parameters are explored. On the engineering side, we review the potential waste pre-treatment technologies and discuss the relevant bioprocess parameters, possible reactor confi gurations, including emerging technologies, and how engineering design-directed research might provide insight into the exploitation of the signifi cant energy potential of biomass resources.

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“…Tabela 3.3 -Produção de hidrogênio a partir de amido -influência do pH, temperatura e concentração de substrato (Lee et al, 2008 Tabela 3.4 -Elementos (mg.L -1 ) e relações DQO:N e DQO:P usados em alguns estudos para produção de hidrogênio (Hawkes et al, 2007) V M-i Volume obtido pelo medidor de biogás (mL) V N Volume de biogás nas CNTP (mL-CNTP) V i Volume de biogás a ser convertido (mL) P a Pressão do ar no local da medição (mbar) P V Pressão parcial de vapor d´água (mbar) P L Pressão da coluna líquida acima da câmara de medição (mbar) P N Pressão normal (1013,25 mbar) (mbar) T N Temperatura normal (273,15 K) (K) T a Temperatura no local da medição O biodiesel é o resultado do processo de transesterificação de óleos e gorduras.…”

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“…Ainda que o pH de operação para a produção de hidrogênio teoricamente estejam bem definidos, a bibliografia discorda muito no estabelecimento de valores ótimos, como se observa na Tabela 3.3 obtida de Lee et al (2008). A faixa de experimentação vai de 4 a 9, e os valores de pH determinados como os melhores para a produção de hidrogênio variam de 4,5 a 8.…”

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Influência da carga orgânica na produção de biohidrogênio em AnSBBR com recirculação da fase líquida tratando o efluente do processo de produção de biodiesel

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AGRADECIMENTOSPrimeiramente, quero agradecer a Deus por suas bênçãos infinitas.À minha família pelo amor e apoio. Ao meu noivo Gabriel pela companhia, amor e compromisso mostrado durante estes dois anos.Aos amigos que sempre estiveram comigo a pesar da distancia. Aos novos amigos feitos no Brasil, em especial a Andrea Pineda cujo comportamento foi o de uma irmã.A Marlene da Silva e aos Sres. Neusa e Toninho Michelon que abriram seus lares para me acolher. Sempre os levarei no meu coração.Um especial agradecimento aos colegas de laboratório. A Giovanna Lovato pelo companheirismo e mutua colaboração no desenvolvimento da pesquisa e a Daniel Lima que além de sua grandiosa amabilidade foi de gram ajuda na revisão do português do presente trabalho.Ao Prof. José Rodrigues pela orientação na presente pesquisa, a atenção continua no trabalho e seu alto nível de compromisso fazendo todo o que for necessário no tempo requerido, com uma pontualidade e organização destacada. Ao Departamento de Hidráulica e Saneamento da Escola de Engenharia de São Carlos da Universidade de São Paulo e a Escola de Engenharia Mauá do Instituto Mauá de Tecnologia que disponibilizaram o espaço e o apoio necessário à realização deste projetoA este maravilhoso país por me acolher e a todas as pessoas que contribuíram de uma ou outra forma no desenvolvimento do programa de mestrado.Um especial agradecimento à Secretaría Nacional de Educación Superior, Ciencia y Tecnología del Ecuador (SENESCYT) pela bolsa de estudos outorgada a través da qual foi possível a consecução desta meta. Finalmente o reator foi operado usando glicerina bruta industrial para comparar os resultados com aqueles obtidos operando com glicerol, observando-se uma clara desvantagem na produção de hidrogênio quando foi usada glicerina bruta. Em geral, o reator AnSBBR operado em batelada sequencial apresentou resultados promissores na produção de hidrogênio usando glicerol como fonte de carbono, porém estudos mais profundos ainda são necessários no intuito de otimizar o sistema para a utilização de glicerina bruta. This study evaluated the influence of applied volumetric organic load on biohydrogen production in an anaerobic sequencing batch biofilm reactor (AnSBBR) with 3.5 L of liquid medium and treating 1.5 L of glycerin based wastewater per cycle at 30ºC. The reactor was operated with two cycle periods (3 and 4 hours), three influent concentrations (3000, 4000 and 5000 mgCOD.L -1 ), recirculation rate of 30 L.h -1 and an inoculum from a poultry slaughterhouse. XIISix applied volumetric organic loads (AVOL CT ) were generated from the combination of cycle period and influent concentrations (7565, 9764, 12911, 10319, 13327 e 16216 mgCOD.L -1 .d -1 ).There was not a clear relation between the applied volumetric organic load and hydrogen production. However, the highest hydrogen molar production (MPr: 67.5 molH 2 .m -3 .d -1 ) was reached when the reactor was operated with a cycle period of 4 h and an influent concentration of 5000 mgCOD.L -1 (AVOL CT : 12911 mgCOD.L -1 . d -1 ). T...

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Exploring optimal environmental factors for fermentative hydrogen production from starch using mixed anaerobic microflora

Cited by 148 publications

References 17 publications

Bio-Hydrogen Production from Pineapple Waste Extract by Anaerobic Mixed Cultures

Bio-Hydrogen Production from Pineapple Waste Extract by Anaerobic Mixed Cultures

Microbiological and engineering aspects of biohydrogen production

Influência da carga orgânica na produção de biohidrogênio em AnSBBR com recirculação da fase líquida tratando o efluente do processo de produção de biodiesel

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