Valorisation of the invasive species, Prosopis juliflora, using the carboxylate platform to produce volatile fatty acids

Njokweni, Sesethu G.; Weimer, Paul J.; Warburg, Lisa; Botes, Marelize; Zyl, Willem H. van

doi:10.1016/j.biortech.2019.121602

Cited by 11 publications

(4 citation statements)

References 35 publications

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“…Exploiting rumen's microbial community is an attractive approach for VFA production from lignocellulosic biomass (Lazuka et al, 2015;Lueangwattanapong et al, 2020). Previous studies on this topic have demonstrated promising results with VFA yield of up to 377 mg/g substrate (Hu & Yu, 2005;Nguyen et al, 2019b;Njokweni et al, 2019). High VFA yield can lead to VFA accumulation and trigger pH drop that is detrimental to microorganism growth.…”

Section: Introductionmentioning

confidence: 99%

Derivation of volatile fatty acid from crop residues digestion using a rumen membrane bioreactor: A feasibility study

Nguyen

Johir

et al. 2020

Bioresource Technology

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Section: Introductionmentioning

confidence: 99%

Derivation of volatile fatty acid from crop residues digestion using a rumen membrane bioreactor: A feasibility study

Nguyen

Johir

et al. 2020

Bioresource Technology

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“…There is a need to find ways to valorize Prosopis, including investigating its potential as a sustainable raw material for ethanol and VFA production. Recently, P. juliflora was investigated for its potential as feedstock for VFA production from in vitro ruminal fermentations without prior pretreatment or pH control [119]. As expected, the digestibility (Table 5) of this recalcitrant shrub without pretreatment was low, but the amounts of VFAs produced were significant, namely 8.07 g/L for its leaves, 6.71 g/L for stems and 6.51 g/L for its branches without pH control.…”

Section: Increasing the Cost Differential Between Input Biomass And P...mentioning

confidence: 76%

Potential Valorization of Organic Waste Streams to Valuable Organic Acids through Microbial Conversion: A South African Case Study

et al. 2021

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The notion of a “biobased economy” in the context of a developing country such as South Africa (SA) necessitates the development of technologies that utilize sustainable feedstocks, have simple and robust operations, are feasible at small scale and produce a variety of valuable bioproducts, thus fitting the biorefinery concept. This case study focuses on the microbial production of higher-value products from selected organic waste streams abundant in the South African agricultural sector using microbes adapted to utilize different parts of biomass waste streams. A ruminant-based carboxylate platform based on mixed or undefined anaerobic co-cultures of rumen microorganisms can convert the carbohydrate polymers in the lignocellulosic part of organic waste streams to carboxylic acids that can be upgraded to biofuels or green chemicals. Furthermore, yeast and fungi can convert the simpler carbohydrates (such as the sugars and malic acid in grape and apple pomace) to ethanol and high-value carboxylic acids, such as lactic, fumaric, succinic and citric acid. This review will discuss the combinational use of the ruminal carboxylate platform and native or recombinant yeasts to valorize biomass waste streams through the production of higher-value organic acids with various applications.

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“…Consistent with our findings, another study [ 39 ] observed that AF could increase the concentration of ruminal tVFA. Additionally, the concentration of NDF in high-AF-based diets was much lower than that in high-SS-based diets, which had a negative relationship with VFA generation [ 40 ], resulting in an increase in tVFA in the higher AF-based diets.…”

Section: Discussionmentioning

confidence: 99%

Silage Mixtures of Alfalfa with Sweet Sorghum Alter Blood and Rumen Physiological Status and Rumen Microbiota of Karakul Lambs

Wang

Cheng

Chaudhry

et al. 2022

Animals

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The study investigated the effects of feeding mixtures of alfalfa (AF) and sweet sorghum (SS) at different ratios of silages in terms of the physiological status of blood and rumen, and rumen microbiota in lambs. A total of 30 four-month-old male Karakul lambs with 25.5 ± 1.4 kg mean initial body weight were randomly allocated to five groups, with six lambs in each group. Five experimental diets containing 40% of one of the five AF–SS mixed silages (containing 0%, 20%, 40%, 60%, and 80% AF on a fresh weight basis, respectively) and 60% of other ingredients were formulated. Overall, the results showed that the mixed silage with more AF tended to increase serum antioxidant capacity, dry matter (DM) intake, and rumen fermentation metabolites. The AF–SS mixed silages containing AF at 60% and 80% caused a significant linear increase (p < 0.05) in the activity of total antioxidant capacity. The superoxide dismutase in the Karakul lamb responded with significant linear and quadratic increases (p < 0.01) as the ratio of AF was increased in the AF–SS mixed silages. Feeding diets with AF in silage mixtures at the ratio of 60% significantly increased (p < 0.05) the concentration of ruminal total volatile fatty acids (tVFA), acetate, and ammonia-N. However, no statistical significance (p > 0.05) was found in the alpha diversity of rumen microbes among the tested groups (p > 0.05). Principal coordinates analysis could clearly discriminate the differences between the five groups (p = 0.001). The relative abundance of Firmicutes in the rumen were significantly higher with AF at 40% in the AF–SS silage-based diet than those with AF at 0%, and 20% ratios. The abundance of Ruminococcus_albus had a significant linear increase (p < 0.05), as the ratio of AF in the AF–SS mixed silages was increased. In conclusion, the best beneficial effect on the physiological status of the blood and rumen, DM intake, and rumen microbiota in lambs came from those that consumed the diet containing the AF–SS mixed silage with 60% AF.

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Valorisation of the invasive species, Prosopis juliflora, using the carboxylate platform to produce volatile fatty acids

Cited by 11 publications

References 35 publications

Derivation of volatile fatty acid from crop residues digestion using a rumen membrane bioreactor: A feasibility study

Derivation of volatile fatty acid from crop residues digestion using a rumen membrane bioreactor: A feasibility study

Potential Valorization of Organic Waste Streams to Valuable Organic Acids through Microbial Conversion: A South African Case Study

Silage Mixtures of Alfalfa with Sweet Sorghum Alter Blood and Rumen Physiological Status and Rumen Microbiota of Karakul Lambs

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