Acidogenic fermentation characteristics of different types of protein-rich substrates in food waste to produce volatile fatty acids

Shen, Dongsheng; Yin, Jun; Xin, Yu; Wang, Meizhen; Ye, Long; Shentu, Jiali; Chen, Ting

doi:10.1016/j.biortech.2016.12.048

Cited by 114 publications

(43 citation statements)

References 34 publications

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“…This biological activity is more intense during the first 7 days of leachate incubation because there is a reduction of more than 10% of the total nitrogen concentrations between the 1 st and 7 th day of the experiment. It corresponds to an acidogenic phase because the pH values are between 6.2 and 7.6 (Reinhart and Al-Yousfi, 1996;Barlaz et al, 2010;Shen et al, 2017). These pH values are consistent with the increase in ammonium nitrogen concentrations, which increased from 1.7 to 2.8 mg / l between the 1 st and 7 th day (Figure 3c).…”

Section: Transformations Of Nitrogen Releasedsupporting

confidence: 77%

“…These pH values are consistent with the increase in ammonium nitrogen concentrations, which increased from 1.7 to 2.8 mg / l between the 1 st and 7 th day (Figure 3c). This increase in ammonium nitrogen concentrations confirms a more or less intense biological activity and shows the installation of a leaching process that promotes the fragmentation of organic macromolecules by hydrolysis or under the effect of enzymes released by acidogenic bacteria (Shen et al, 2017). Indeed, some macromolecules are momentarily unavailable to microorganisms and must undergo multiple actions of reduction and transformation by simple or enzymatic hydrolysis before being accessible to microorganisms.…”

Section: Transformations Of Nitrogen Releasedmentioning

confidence: 64%

“…Indeed, the pH although it is not directly influenced by the evolution of nitrates, its production by nitrification releases hydronium ions which condition the pH of the medium. However, the pH values increased from 6.2 to 7.4 and show the gradual establishment of a less and less acidic medium that could be justified by a significant consumption of Volatile Fatty Acids (VFAs) more than a production of ammonium ions and more than the process transforming a portion of ammonium ions into nitrate by nitrification (El-Mahrouki et al, 2004;Shen et al, 2017). In addition, these pH values are favorable for the development and enzymatic activity of nitrifying bacteria because the optimum pH for nitrification is around 8.0 and it is shown that for pH values outside the range 6.0 -8.5 the effectiveness of nitrification is affected (Jiménez et al, 2011;Huyen Le et al, 2019).…”

Section: Transformations Of Nitrogen Releasedmentioning

confidence: 99%

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The impact of household and similar solid wastes on Kara River quality due to their potential to release nitrogen

Segbeaya¹,

Koledzi²,

Baba³

et al. 2019

J. Environ. Chem. Ecotoxicol.

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This study purpose to assess the real share of nitrogen the household and similar solid wastes can release in direct contact with water. The maximum amount of nitrogen could release was determined by a leaching test. The concentrations of total and organic nitrogen, ammonium and nitrates ions and the pH values were measured in the initial and incubated juices. The leaching test showed that the solid waste can release 261 mg of total nitrogen (TN) in water for 1 kg of dry waste. This amount of total nitrogen corresponds to 240.1 mg of organic nitrogen (OrgN), 17 mg of ammonium nitrogen (, 3.3 mg of nitrate nitrogen () and 0.4 mg of nitrite nitrogen (). The monitoring of the nitrogen biotransformation has shown a good disposition of the organic nitrogen to be transformed into ammonium ions and the ammonium ions into nitrate ions. By 2025, the forecast calculations of nitrogen input into the river's waters show that the zone downstream of the river and the heart of the city will be more impacted by nitrogen pollution. The expected variations in total nitrogen (TN) and nitrate ion concentrations are respectively between 6.49 and 8.85 μg/L and 0.35 and 0.87 μg/L. These concentrations are considered weak but by interacting with the release of sediments during the dry season they can participate at the eutrophication process. Leaching and incubation test can be used to forecast the negative impact of solid waste on the river.

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Section: Transformations Of Nitrogen Releasedsupporting

confidence: 77%

Section: Transformations Of Nitrogen Releasedmentioning

confidence: 64%

Section: Transformations Of Nitrogen Releasedmentioning

confidence: 99%

See 1 more Smart Citation

The impact of household and similar solid wastes on Kara River quality due to their potential to release nitrogen

Segbeaya¹,

Koledzi²,

Baba³

et al. 2019

J. Environ. Chem. Ecotoxicol.

View full text Add to dashboard Cite

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“…Both processes are dependent on the process conditions (e.g., loading rate and pH) and the composition of microbial consortia present (van Aarle et al, ). Previous studies have mainly focused on the VFA fermentation of food waste (FW; Cavinato, Frison, et al, ; Shen et al, ; Yin, Yu, Wang, & Shen, ) and sewage sludge (Jankowska et al, ; Liu et al, ; Peces, Astals, Clarke, & Jensen, ), while a few studies report the use of rural biomasses such as cattle or swine manure (Cavinato, Da Ros, et al, ; Huang et al, ). Food waste is a major waste fraction in urban areas and it has potential for the production of various energy carriers in a centralized urban context, while manure and slurry are produced in vast quantities in areas of intense animal production and have potential mostly in decentralized farm systems.…”

Section: Introductionmentioning

confidence: 99%

Volatile fatty acids (VFAs) and methane from food waste and cow slurry: Comparison of biogas and VFA fermentation processes

et al. 2018

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The potential of various biomasses for the production of green chemicals is currently one of the key topics in the field of the circular economy. Volatile fatty acids (VFAs) are intermediates in the methane formation pathway of anaerobic digestion and they can be produced in similar reactors as biogas to increase the productivity of a digestion plant, as VFAs have more varying end uses compared to biogas and methane. In this study, the aim was to assess the biogas and VFA production of food waste (FW) and cow slurry (CS) using the anaerobic biogas plant inoculum treating the corresponding substrates. The biogas and VFA production of both biomasses were studied in identical batch scale laboratory conditions while the process performance was assessed with chemical and microbial analyses. As a result, FW and CS were shown to have different chemical performances and microbial dynamics in both VFA and biogas processes. FW as a substrate showed higher yields in both processes (435 ml CH4/g VSfed and 434 mg VFA/g VSfed) due to its characteristics (pH, organic composition, microbial communities), and thus, the vast volume of CS makes it also a relevant substrate for VFA and biogas production. In this study, VFA profiles were highly dependent on the substrate and inoculum characteristics, while orders Clostridiales and Lactobacillales were connected with high VFA and butyric acid production with FW as a substrate. In conclusion, anaerobic digestion supports the implementation of the waste management hierarchy as it enables the production of renewable green chemicals from both urban and rural waste materials.

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“…Bioconversion of protein-based biomasses into biofuels is usually the rate-limiting step during acidogenesis and solventogenesis phases of the proteolytic and solventproducing Clostridia [5,10]. It gives a competitive advantage to the ABE fermentation, as cattle bones are expected to witness the fastest growth at a compound annual growth rate (CAGR) of 4.9% volume from 2016 to 2024.…”

Section: Introductionmentioning

confidence: 99%

Growth‐associated catabolic potential of Acetoanaerobium sticklandii DSM 519 on gelatin and amino acids

Sangavai

Chellapandi

2020

J Basic Microbiol

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Acetoanaerobium sticklandii DSM 519 is a hyperammonia‐producing anaerobe that catabolizes proteins and amino acids into organic solvents and volatile acids via the Stickland reactions. However, the specific growth rate and metabolic capability of this organism on proteins and amino acids are not yet known. Therefore, the present study was intended to evaluate its specific growth rate and metabolic potential on gelatin and amino acids in the experimental media. We carried out metabolic assay experiments to calculate its ability to utilize pure gelatin, single amino acids, and amino acid pairs at different growth phases. The results of this study show that complete assimilation of gelatin was achieved by its log‐phase culture. The subsequent fermentation of amino acids was much faster than gelatin hydrolysis. The rate of gelatin degradation was associated with the growth and catabolic rates of this organism. Many amino acids were not assimilated completely for its growth and energy conservation. A log‐phase culture of this organism preferably utilized l‐cysteine, l‐arginine, and l‐serine, and released more fraction of ammonia. As shown by our analysis, the catabolic rates of these amino acids were determined by the rates of respective enzymes involved in amino acid catabolic pathways and feedback repression of ammonia. The growth kinetic data indicated that at the initial growth stage, a metabolic shift in its solventogenesis and acidogenesis phases was associated with catabolism of certain amino acids. Thus, the results of this study provide a new insight to exploit its log‐phase culture as a starter for the production of biofuel components from gelatin processing industries.

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Acidogenic fermentation characteristics of different types of protein-rich substrates in food waste to produce volatile fatty acids

Cited by 114 publications

References 34 publications

The impact of household and similar solid wastes on Kara River quality due to their potential to release nitrogen

The impact of household and similar solid wastes on Kara River quality due to their potential to release nitrogen

Volatile fatty acids (VFAs) and methane from food waste and cow slurry: Comparison of biogas and VFA fermentation processes

Growth‐associated catabolic potential of Acetoanaerobium sticklandii DSM 519 on gelatin and amino acids

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