Effect of Lactate and Starter Inoculum on Biogas Production from Fresh Maize and Maize Silage

Satpathy, Preseela; Steinigeweg, Sven; Siefert, E.; Cypionka, Heribert

doi:10.4236/aim.2017.75030

Cited by 15 publications

(6 citation statements)

References 31 publications

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“…Silage technology has been applied to biomass storage in biogas production and ensilaging is regarded as a means of increasing methane yield from anaerobic digestion. Lactic acid is a common product of the acidogenic step in two-stage anaerobic digesters [ 14 , 37 – 40 ].…”

Section: Discussionmentioning

confidence: 99%

“…Surprisingly, until recently, the oxidation of lactate under anaerobic conditions performed by lactate oxidizers did not draw enough attention in the context of the acetogenic step of AD, despite the fact that lactate is a key intermediate in anaerobic digestion of organic matter [ 13 , 14 ]. Furthermore, lactate oxidation is a thermodynamically attractive process when compared to butyrate, propionate, acetate, or ethanol oxidation.…”

Section: Introductionmentioning

confidence: 99%

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Methane-yielding microbial communities processing lactate-rich substrates: a piece of the anaerobic digestion puzzle

Detman

Mielecki

Pleśniak

et al. 2018

Biotechnol Biofuels

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BackgroundAnaerobic digestion, whose final products are methane and carbon dioxide, ensures energy flow and circulation of matter in ecosystems. This naturally occurring process is used for the production of renewable energy from biomass. Lactate, a common product of acidic fermentation, is a key intermediate in anaerobic digestion of biomass in the environment and biogas plants. Effective utilization of lactate has been observed in many experimental approaches used to study anaerobic digestion. Interestingly, anaerobic lactate oxidation and lactate oxidizers as a physiological group in methane-yielding microbial communities have not received enough attention in the context of the acetogenic step of anaerobic digestion. This study focuses on metabolic transformation of lactate during the acetogenic and methanogenic steps of anaerobic digestion in methane-yielding bioreactors.ResultsMethane-yielding microbial communities instead of pure cultures of acetate producers were used to process artificial lactate-rich media to methane and carbon dioxide in up-flow anaerobic sludge blanket reactors. The media imitated the mixture of acidic products found in anaerobic environments/digesters where lactate fermentation dominates in acidogenesis. Effective utilization of lactate and biogas production was observed. 16S rRNA profiling was used to examine the selected methane-yielding communities. Among Archaea present in the bioreactors, the order Methanosarcinales predominated. The acetoclastic pathway of methane formation was further confirmed by analysis of the stable carbon isotope composition of methane and carbon dioxide. The domain Bacteria was represented by Bacteroidetes, Firmicutes, Proteobacteria, Synergistetes, Actinobacteria, Spirochaetes, Tenericutes, Caldithrix, Verrucomicrobia, Thermotogae, Chloroflexi, Nitrospirae, and Cyanobacteria. Available genome sequences of species and/or genera identified in the microbial communities were searched for genes encoding the lactate-oxidizing metabolic machinery homologous to those of Acetobacterium woodii and Desulfovibrio vulgaris. Furthermore, genes for enzymes of the reductive acetyl-CoA pathway were present in the microbial communities.ConclusionsThe results indicate that lactate is oxidized mainly to acetate during the acetogenic step of AD and this comprises the acetotrophic pathway of methanogenesis. The genes for lactate utilization under anaerobic conditions are widespread in the domain Bacteria. Lactate oxidation to the substrates for methanogens is the most energetically attractive process in comparison to butyrate, propionate, or ethanol oxidation.Electronic supplementary materialThe online version of this article (10.1186/s13068-018-1106-z) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Methane-yielding microbial communities processing lactate-rich substrates: a piece of the anaerobic digestion puzzle

Detman

Mielecki

Pleśniak

et al. 2018

Biotechnol Biofuels

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“…The physiological characteristics of LAB, mainly the ability to degrade polymers, utilize carbohydrates and produce acids (lactic and acetic), indicate that these bacteria have the potential to play an active role in fermenters for biogas production. Satpathy et al [137] investigated the effect of lactic acid on biogas production from substrates such as fresh corn and corn silage. Several types of samples (from an agricultural biogas plant, a wastewater treatment plant and a standardized laboratory reactor) were used as inoculum to study the effect of starter culture on the process.…”

Section: Biogas Productionmentioning

confidence: 99%

Lactic Acid Bacteria in Sustainable Food Production

Rachwał,

Gustaw

2024

Sustainability

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The main tenets of the sustainable food production model are to reduce the adverse environmental impacts of production and to use available resources more efficiently. The sustainable food production model allows companies to adapt their strategies to current challenges and requirements while maintaining long-term production stability and competitiveness. To ensure that sustainable food chain participants implement appropriate practices, research is being conducted to develop new solutions. Among the important issues that are of great interest to researchers is the use of lactic acid bacteria (LAB). These bacteria play a pivotal role in sustainable food production, encompassing environmental, economic, and social aspects. The following article highlights recent innovations and advancements in LAB applications, contributing to enhanced efficiency and sustainable development of food products. By fermenting food, LAB effectively enhances food safety, prolong shelf life, and augment nutritional values, while simultaneously eliminating or outcompeting foodborne pathogens, thus preventing food poisoning. This article underscores these often-overlooked aspects of LAB, such as the critical role of fermented food in sustaining humanity during challenging times, by providing essential nutrients, and supporting health through its unique preservative and probiotic properties. It also points out the lesser-known applications of these microorganisms, including the degradation of organic waste or biogas and bioplastics production.

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“…Mixture of different raw materials was also used for the biogas production such as cow dung, pig manure, cow urine, and fecal matter [7]. Maize and silage were also used as the raw materials for the biogas production among which silage have higher biogas yield compared to maize [20].…”

Section: Characterization Of Iron Oxidementioning

confidence: 99%

“…The biogas production was 2. Silage and maize were used as the feed for biogas production [20] and here used 450 grams of feed to give 605 ml of biogas at the end of 12 th day. Biogas production noted for different algal species like Cladophora glomerata, Chara fragilis, and Spirogyra neglecta for 15 days in which Spirogyra neglecta gave maximum yield [4].…”

Section: Optimization Of Ph and Iron Oxide Nanoparticle Inmentioning

confidence: 99%

Biogas Production from Food Waste Using Nanocatalyst

Bharathi

Dayana

Rangaraju³

et al. 2022

Journal of Nanomaterials

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The food waste management has become a very important part in the modern world. In the olden days, the population was very low, so that the low waste produced was easily disposed by dumping it under the soil. However, nowadays, due to high population, amount of waste is produced high which could not be dumped due to the land pollution. To overcome this problem, the food waste must be managed or utilized properly to give zero waste. Therefore, this work focused on the production of biogas from food waste through the anaerobic digestion process using iron oxide nanoparticles. The iron oxide nanocatalyst from red mud reduced the process time for the anaerobic digestion was by 5.38% compared to the noncatalytic process. The produced biogas analysis done through GCMS analysis and calculated by comparing the both anaerobic degradation setup with and without nanocatalyst. Nanocatalyzed degradation contains 50% high amount of methane and 23.5% of total amount of biogas when compared to nonnanocatalyzed degradation.

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Effect of Lactate and Starter Inoculum on Biogas Production from Fresh Maize and Maize Silage

Cited by 15 publications

References 31 publications

Methane-yielding microbial communities processing lactate-rich substrates: a piece of the anaerobic digestion puzzle

Methane-yielding microbial communities processing lactate-rich substrates: a piece of the anaerobic digestion puzzle

Lactic Acid Bacteria in Sustainable Food Production

Biogas Production from Food Waste Using Nanocatalyst

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