Steering acidogenesis towards selective propionic acid production using co-factors and evaluating environmental sustainability

Dahiya, Shikha; Lakshminarayanan, Sushmitha; Mohan, S. Venkata

doi:10.1016/j.cej.2019.122135

Cited by 37 publications

(15 citation statements)

References 45 publications

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“…use of a monoculture and glucose as substrate), whereas PA production consumes H. Thus, it is often reported that the increase in H 2 concentration stimulates PA production. [46][47][48] By contrast, the accumulation of PA was not always linked to the production rate of H 2 in anaerobic treatment of wastewater as stated by Wang et al 48 Similar results also were observed by Inanc et al 49 showing that a lower H 2 pressure did not affect the accumulation of PA and other VFA. However, no obvious correlation was observed between H 2 and PA or other VFA production in this study, probably as a consequence of the variations in the composition and performance of the microbial communities and the wide metabolic diversity associated with the different species.…”

Section: Gas Production and Compositionsupporting

confidence: 71%

“…The production of butyric acid and/or acetic acid are usually accompanied by H 2 production under controlled laboratory conditions (e.g. use of a monoculture and glucose as substrate), whereas PA production consumes H. Thus, it is often reported that the increase in H 2 concentration stimulates PA production 46‐48 . By contrast, the accumulation of PA was not always linked to the production rate of H 2 in anaerobic treatment of wastewater as stated by Wang et al 48 .…”

Section: Resultsmentioning

confidence: 99%

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Enhanced production of propionic acid through acidic hydrolysis by choice of inoculum

Ali

Saravia

Hille-Reichel

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: In this study, the enhancement of propionic acid production from a model feedstock mimicking kitchen waste was investigated. For that purpose, two operational runs of a semicontinuous anaerobic hydrolysis reactor were carried out at pH 6.0 ± 0.1 and mesophilic (30°C) temperature. Two different types of inocula, a mixed microbial culture selected over 24 months for growth on cellulose and a culture contained in goat cheese were compared. RESULTS: The results show that the goat cheese inoculum was significantly more efficient for propionic acid (PA) production. The highest propionic acid concentration achieved amounted to 139 mmol L −1 at a yield of 23.3 mg g −1 volatile solids (VS), which was 55% greater than what was achieved with the mixed culture. Furthermore, it was observed that propionic acid production was enhanced by a combination of high hydraulic retention time (HRT) with low organic loading rate (OLR), ensuring sufficient time for complete processing of the complex organic substrates. The fermentation could be kept in a stable process of propionic acid production at HRT of 20 days and a rather low OLR of 11.1 g L −1 day −1 VS. CONCLUSION: Our results give a better understanding of PA production in semicontinuous mode, applying optimized process parameters and selecting the adequate microbial community for inoculation. This study provides important information for the improvement of PA production from complex substrates for future industrial application.

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Section: Gas Production and Compositionsupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Enhanced production of propionic acid through acidic hydrolysis by choice of inoculum

Ali

Saravia

Hille-Reichel

et al. 2020

J of Chemical Tech & Biotech

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“…After purification steps, their potential applications comprise food industry, as preservatives; the cosmetic industry; and pharmaceuticals. The economical aspects regarding SCFAs productions can be found in the literature [57,58].…”

Section: General Considerationsmentioning

confidence: 99%

Non-Energetic Chemical Products by Fermentation of Hydrolyzed Sewage Sludge

et al. 2021

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Hydrolysis and the solubilization of sewage sludge processes are important tools to obtain small and medium molecules with different application perspectives. Although the production of biomethane and other products such as biohydrogen from sludge as biofuel alternatives has been profusely studied, the current perspectives are mainly focused on the use of the sludge hydrolysate to produce non-energy bioproducts and biomaterials. In this review, the most recent bibliography dealing with the use of sludge hydrolysates as fermentation media for the bioproduction of new non-energetic products with industrial interest is here revised and discussed. In this regard, the main research effort has been focused on the bioproduction of short-chain fatty acids due to their direct use in industrial applications or as a carbon source for polyhydroxyalkanoates-producing microorganisms. The use of sludge hydrolysates as fermentation media using pure cultures to produce more complex biomolecules, such as enzymes or lipids, is gaining interest, but it remains an undervalued topic. The literature has been divided into processes where hydrolysis and fermentation stages took place simultaneously or separately, centering them on the effect of the main operational conditions on the yields and properties of the corresponding metabolites produced. In general, the main limiting step of these kinds of processes is the proper solubilization and hydrolysis of the sludge, which can improve the bioassimilation of nutrients and, subsequently, the productivities and compositions of the metabolites obtained. Biological and/or thermal pretreaments are the options more profusely employed, which are frequently assisted by different promoters such as oxidants, surfactants, or cation exchange resins.

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“…LCA was performed for propionic acid production by acidogenic fermentation at the lab scale using SimaPro 8.5.2.0 (Dahiya et al 2020). The system boundary of gate-to-gate was considered excluding the separation of acids.…”

Section: Biopropionic Acid Production-process Sustainability Analysismentioning

confidence: 99%

“…ILUC induce Fig. 12 Impact category for biological propionic acid production using a CML-IA baseline V3.05/2000 and b IMPACT 2002+ baseline method (Dahiya et al 2020) deforestation or may shift the current cultivation practices which directly influence climate change. ILUC also results in environmental burden shifting with impacts on eutrophication, water scarcity, and food security which eventually affects human health.…”

Section: Challenges With Lca Applicationmentioning

confidence: 99%

Biobased Products and Life Cycle Assessment in the Context of Circular Economy and Sustainability

et al. 2020

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Biobased products (biobased materials, bioenergy/biofuels, and biobased chemicals) are the futuristic replacement of fossil-based chemicals and considerably the best way of transiting towards a low-carbon economy (LCE) and which also can simultaneously mitigate the global challenges associated with the depletion of abiotic resources and climate change. Endurance with the biobased products is leading to the development of a biobased economy (BBE). Assessment of environmental sustainability achieved by the production of biobased products is important to understand their decarbonization potential, and all associated impacts with their life cycle and can be measured with life cycle assessment (LCA) tool. Life cycle sustainability assessment (LCSA) combines LCA with life cycle costing (LCC) and social life cycle assessment (sLCA). The framework of this paper is thus designed to provide an insight into biobased products with an overview of LCA as critical tools to measure sustainability. LCA methodology and its importance in determining sustainability for biobased products with associated limitations and probable solutions are also discussed. Circular economy (CE) integrating cradle-to-cradle (C2C) approach is also discussed as a promising endeavor to achieve LCE.

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Steering acidogenesis towards selective propionic acid production using co-factors and evaluating environmental sustainability

Cited by 37 publications

References 45 publications

Enhanced production of propionic acid through acidic hydrolysis by choice of inoculum

Enhanced production of propionic acid through acidic hydrolysis by choice of inoculum

Non-Energetic Chemical Products by Fermentation of Hydrolyzed Sewage Sludge

Biobased Products and Life Cycle Assessment in the Context of Circular Economy and Sustainability

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