Microbial hydrogen production by bioconversion of crude glycerol: A review

Sarma, Saurabh Jyoti; Brar, Satinder Kaur; Sydney, Eduardo Bittencourt; Bihan, Yann Le; Buelna, Gerardo; Soccol, Carlos Ricardo

doi:10.1016/j.ijhydene.2012.01.050

Cited by 149 publications

(88 citation statements)

References 91 publications

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“…Once glycerol has been used for production of different products, various microorganisms have been evaluated for their glycerol bioconversion ability (Sarma et al 2012). Tao et al (2005) investigated Serratia marcescens strains for the production of the natural red pigment prodigiosin and observed higher yield when using glycerol as a carbon source.…”

Section: Resultsmentioning

confidence: 99%

Detoxification of Mercury by Bacteria Using Crude Glycerol from Biodiesel as a Carbon Source

Giovanella

Costa

Schaffer

et al. 2015

Water Air Soil Pollut

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Bacteria that harbor the mer operon in their genome are able to enzymatically reduce mercury (II) to the volatile form of mercury Hg (0). Detoxification of contaminated waste by using these bacteria may be an alternative to conventional methods for mercury removal. Residual glycerol from the biodiesel industry can be used as a carbon source to accelerate the process. This work shows for the first time the feasibility of using residual glycerol as a carbon source for Hg removal by bacteria prospected from contaminated environments. Eight bacterial isolates were able to remove mercury and degrade glycerol in mineral medium and residual glycerol. Mercury removal was monitored by atomic absorption spectroscopy and glycerol degradation by high performance liquid chromatography. The best results of mercury removal and glycerol degradation were obtained using isolates of Serratia marcescens M25C (85 and 100 %), Klebsiella pneumoniae PLB (90 and 100 %), Klebsiella oxytoca (90 and 100 %), and Arthrobacter sp. U3 (80 and 75 %), with addition of 0.5 g L −1 yeast extract. The Arthrobacter sp. U3 isolate is common in soils and has proven to be a promising candidate for environment applications due to its low pathogenicity and higher Hg removal and glycerol degradation rates.

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Section: Resultsmentioning

confidence: 99%

Detoxification of Mercury by Bacteria Using Crude Glycerol from Biodiesel as a Carbon Source

Giovanella

Costa

Schaffer

et al. 2015

Water Air Soil Pollut

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“…Desta maneira, o cultivo de microrganismos, entre eles as microalgas, pode ser um destino interessante para o glicerol. Destaca-se que o glicerol pode inibir o crescimento de microalgas, sendo importante otimizar a concentração do substrato, de acordo com a cepa de interesse e, se preciso, adotar o cultivo em fed-batch (LIANG; SARKANY; CUI, 2009;SARMA et al, 2012). Caso a opção de fonte de carbono seja o glicerol não purificado, oriundo da produção de biodiesel, é necessário observar se as impurezas presentes prejudicam o crescimento da microalga.…”

Section: Tabela 2 -Composição Da Biomassa (%) Deunclassified

Cultivo não-fotoautotrófico de microalgas: uma visão geral

Angelo

Andrade

Filho

2015

Semin. Cienc. Biol. Saude

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As microalgas são um grupo heterogêneo de microrganismos, dos quais podem ser extraídos diversos produtos tais como: proteínas, carboidratos, pigmentos e óleos com perfil contendo ácidos graxos saturados, poli-insaturados e mono-insaturados. Esses microrganismos apresentam diferentes formas de metabolismo energético, destacando-se o fotoautotrófico, heterotrófico, mixotrófico e fotoheterotrófico. A compreensão destas formas de metabolismo permite aplicar às microalgas estratégias de cultivos visando o aumento da produção de biomassa algal, e seus coprodutos em grandes escalas. Tradicionalmente, o cultivo de microalgas explora seu metabolismo fotoautotrófico. No entanto, estudos têm apontado vantagens da produção de biomassa destes microrganismos por outras vias metabólicas. Desta maneira, essa revisão tem por objetivo apresentar uma visão geral das formas de metabolismo não-fotoautotrófico das microalgas e considerações sobre a produção de biomassa desses microrganismos nesses diferentes sistemas de cultivo. No metabolismo heterotrófico, as fontes de carbono que mais têm se destacado para as microalgas são: glicose, glicerol e ácido acético. Além disso, diversos estudos apresentam fontes alternativas de meio de cultivo, como os resíduos agroindustriais e sanitários. O metabolismo mixotrófico pode ser definido como aquele em que ocorre simultaneamente a fotossíntese e a oxidação de compostos orgânicos externos. No metabolismo fotoheterotrófico, a luz é a fonte de energia e o composto orgânico é a fonte de carbono. Os sistemas de cultivo não-fotoautotróficos de microalgas são de alto potencial, principalmente devido ao aumento de escala e produtividade. No entanto, deve-se ressaltar que informações sobre esses sistemas de cultivo de microalgas em grande escala para uma produção competitiva ainda são escassas. AbstractMicroalgae are a heterogeneous group of microorganisms that produces biomass from which can be extracted various products such as proteins, carbohydrates, pigments and oils with profile containing saturated fatty acids, polyunsaturated and monounsaturated. These microorganisms have different forms of energetic metabolism, especially the photoautotrophic, heterotrophic, mixotrophic and photoautotrophic. Understanding these metabolic forms allows to apply microalgae strategies of cultivation aiming to increase algal biomass production, and its co-products in large scales. Traditionally, the microalgae cultivation is done by exploiting their photoautotrophic metabolism. However, studies have point out some advantages in the production of biomass of these microorganisms by using other metabolic pathways. Thus, this review aims to present an overview of the forms of non-photoautotrophic microalgae metabolism and considerations on the different systems of biomass production of these microorganisms. In the heterotrophic metabolism, sources of carbon that have stood out the most for microalgae are: glucose, glycerol and acetic acid. Nevertheless, there are several studies that present alternative sources of c...

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“…However, it has been shown that CG is as good as PG since the trace amounts of contaminants was helpful in improving bacterial growth and H 2 production [26,38]. In fact, the efficiency to utilize CG has been revealed to be higher when bacteria acted syntrophically to metabolize contaminants such as methanol and soap present in the CG [39]. In spite of these advantages, utilization of CG on a large scale is still facing some hurdles.…”

Section: Batch Culturementioning

confidence: 99%

Biodiesel Industry Waste: A Potential Source of Bioenergy and Biopolymers

et al. 2014

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Biodiesel has been recognized as a good source of energy and its production is increasing rapidly. During biodiesel production, effluent containing 70-75 % glycerol is generated, which accounts for 10 % of the total produce. This has led to a scenario where the price of glycerol has declined dramatically and its disposal is becoming uneconomical. Recent efforts to extend the biotechnological applications of glycerol for producing hydrogen and polyhydroxyalkanoates have been quite encouraging. Bacillus spp. are among those few organisms, which have the potential to metabolize glycerol to produce energy and biopolymers. Bacillus may thus be recognized as the Power-Horse of the future.

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Microbial hydrogen production by bioconversion of crude glycerol: A review

Cited by 149 publications

References 91 publications

Detoxification of Mercury by Bacteria Using Crude Glycerol from Biodiesel as a Carbon Source

Detoxification of Mercury by Bacteria Using Crude Glycerol from Biodiesel as a Carbon Source

Cultivo não-fotoautotrófico de microalgas: uma visão geral

Biodiesel Industry Waste: A Potential Source of Bioenergy and Biopolymers

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