Lactic acid accumulation from sludge and food waste to improve the yield of propionic acid-enriched VFA

Li, Xiang; Chen, Yinguang; Zhao, Shuang; Wang, Dongbo; Zheng, Xiong; Luo, Jingyang

doi:10.1016/j.bej.2013.12.020

Cited by 50 publications

(14 citation statements)

References 27 publications

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“…As most of TOA was in the form of lactic acid, it could be suggested that the predominant production of lactic acid was due to the abundance of indigenous lactic acid bacterial (LAB) in the food waste which could effectively utilize the mixed carbohydrate of hydrolyzates derived from food waste (Probst et al, 2015;Wang et al, 2015;Wu et al, 2015). Lactic acid is an intermediate metabolic product and may also be effective for denitrification because it has been considered as the precursor for propionic and acetic acids production (Elefsiniotis and Li, 2006;Li et al, 2014). Although lactic acid may not be as readily utilizable as propionic acid for denitrifiers, it is still effective for denitrification in longer biological reaction process (Sage et al, 2006).…”

Section: Effect Of Initial Solid Concentrationmentioning

confidence: 98%

Effect of fermentation liquid from food waste as a carbon source for enhancing denitrification in wastewater treatment

et al. 2016

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Section: Effect Of Initial Solid Concentrationmentioning

confidence: 98%

Effect of fermentation liquid from food waste as a carbon source for enhancing denitrification in wastewater treatment

et al. 2016

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“…The degradation rate of propionic acid is the slowest in all kinds of VFAs and microbes are sensitive to it (Demirel et al, 2002;Wang et al, 2009;Izumi et al, 2010). Hanaki et al (Hanaki et al, 1994) pointed out that the limited propionate concentration for methanogens was less than 1.0 gL -1 , and lactic acid was the direct substrate for propionic acid production (Li et al, 2014). Its optimal pH value for conversion process is 5-6 (Fu et al, 1999).…”

Section: Ph Value and Vfas Concentrationmentioning

confidence: 99%

Comparing two enhancing methods for improving kitchen waste anaerobic digestion: Bentonite addition and autoclaved de-oiling pretreatment

Zhang

Duan

Tian

et al. 2018

Process Safety and Environmental Protection

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“…This could be due to the possible involvement of Propionibacterium that is addressed to convert lactate into propionate and acetate. 22 Propionic acid was also an observed metabolic product, although significant concentrations of this compound were measured only at the initial pH value of 7.4. This could be supported by findings that propionic acidproducing bacteria grow faster at neutral pH values.…”

Section: Influence Of Initial Ph Value On Metabolic Pathways and Smentioning

confidence: 96%

Biohydrogen Production from Simple Carbohydrates with Optimization of Operating Parameters

Muri

Osojnik-Črnivec

Djinović

et al. 2016

ACSi

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Hydrogen could be alternative energy carrier and source for chemical and fuel synthesis due to its high energy content, sustainable technology and zero carbon emissions. In particular, conversion of organic substrates to hydrogen via dark fermentation process is of great interest. The aim of this study was fermentative hydrogen production using anaerobic mixed culture using different carbon sources (mono and disaccharides) and further optimization by varying several operating parameters (pH value, temperature, organic loading, mixing intensity). Among all tested mono-and disaccharides, glucose was shown as the preferred carbon source exhibiting hydrogen yield of 1.44 mol H 2 /mol glucose. Further evaluation of selected operating parameters showed that the highest hydrogen yield (1.55 mol H 2 /mol glucose) was obtained at the initial pH value of 6.4, T = 37 °C and organic loading of 5 g/L. The results show that lower hydrogen yield at all other conditions was associated with a redirection of metabolic pathways from butyric and acetic (accompanied by H 2 production) to lactic (simultaneous H 2 production is not mandatory) acid production. These results, therefore, represent an important foundation for the optimization and industrial-scale production of hydrogen from organic substrates.

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Lactic acid accumulation from sludge and food waste to improve the yield of propionic acid-enriched VFA

Cited by 50 publications

References 27 publications

Effect of fermentation liquid from food waste as a carbon source for enhancing denitrification in wastewater treatment

Effect of fermentation liquid from food waste as a carbon source for enhancing denitrification in wastewater treatment

Comparing two enhancing methods for improving kitchen waste anaerobic digestion: Bentonite addition and autoclaved de-oiling pretreatment

Biohydrogen Production from Simple Carbohydrates with Optimization of Operating Parameters

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