Bioconversion of waste cooking oil glycerol from cabbage extract to lactic acid by Rhizopus microsporus

Yuwa-amornpitak, Thalisa; Chookietwatana, Kannika

doi:10.1016/j.bjm.2018.06.007

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…This may be due to the presence of (bio‐)available nutrients in the complex substrate (YPH), as the maximum LA production of 50.50 g L −1 and 31.17 g L −1 was achieved for YPH and SGS, respectively. This shows that the YPH yielded more LA than the SGS in a submerged process which is similar to the findings in the literature 53 . Figure 2(b) is the biomass growth of the R. oryzae in YPH and SGS using submerged culture.…”

Section: Resultssupporting

confidence: 88%

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Lactic acid production: Utilization of yam peel hydrolysate as a substrate using Rhizopus orysae in kinetic studies

Ajala

Onoriemu

et al. 2021

Biofuels Bioprod Bioref

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The prospect of utilizing yam peel hydrolysate (YPH) as a carbon source for lactic acid (LA) production using Rhizopus orysae was investigated in batch surface and submerged fermentation processes. The kinetics of biomass growth, substrate utilization and LA production were studied using models of modified Luedeking–Piret, logistic and simple Luedeking–Piret equations, respectively, for the surface and submerged processes. The YPH containing 80 g L−1 of reducing sugars (glucose, xylose, ribose and others) was obtained by acid hydrolysis (H2SO4) of 100 g L−1 of yam peel and used for fermentation. The LA yield from the YPH was 80.03% and 75.63% for the surface and submerged fermentation, respectively. These values were higher than those of synthetic glucose syrup (SGS), which were 77.36% and 38.96% for surface and submerged fermentation, respectively. The models were satisfactory for the fermentation processes with high accuracy of R2 ((0.89 to 0.96), (0.95 to 0.99) and (0.86 to 0.99)) for biomass growth, substrate (SGS/YPH) utilization and LA production, respectively. The models also elucidated that the fermentation process was growth associated (α) instead of non‐growth associated (β) because the value of α/β was greater than 1. This justified the other kinetic parameters obtained for the growth phase. Therefore, Rhizopus oryzae effectively converted YPH to LA with a high yield and purity. © 2021 Society of Industrial Chemistry and John Wiley & Sons Ltd

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Section: Resultssupporting

confidence: 88%

“…Worthy of note is the strong performance of the YPH as a carbon source for LA production as it yielded more than the SGS. These findings justify the view that the Rhizopus species can transform carbon sources of synthetic glucose, hydrolysates of starch and cellulose to LA production 53 . As shown in Fig.…”

Section: Resultssupporting

confidence: 83%

Lactic acid production: Utilization of yam peel hydrolysate as a substrate using Rhizopus orysae in kinetic studies

Ajala

Onoriemu

et al. 2021

Biofuels Bioprod Bioref

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“…LA is a soluble carboxylic acid that has two isomers: L‐Lactic acid and D‐Lactic acid. Several types of microorganisms, such as bacteria, fungi, 22,23 algae, 24 and yeast, synthetise LA. Industrial LA production is, generally, performed by lactic acid bacteria (LAB) that synthetise LA directly from carbohydrates, as main product of their methabolism 25 .…”

Section: Introductionmentioning

confidence: 99%

Effect of pH on lactic acid fermentation of food waste using different mixed culture inocula

Pau

Tan

Lens

2021

J of Chemical Tech & Biotech

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BACKGROUND Increasing amounts of food waste (FW) have become a critical problem in the last few decades. Sustainable methods to limit the impact of FW on the environment are required. FW valorisation through lactic acid (LA) fermentation can assist by producing a valuable commodity from a cheap substrate. LA is a chemical with increasing market potential, it is used in several industrial sectors, and it is the main component of polylactic acid bioproducts. RESULTS The role of pH on LA production from FW was tested with three anaerobic inocula and a control with solely FW. The most suitable condition for LA production was at pH < 4. The best results in terms of final LA concentration (1.8 gCOD L–1), yield (224 mgCOD/gVS), and COD conversion (50%) were found in uncontrolled pH conditions with no external inoculum addition. FW already has a good abundance of LA bacteria that are responsible for lactate production. Among the external inocula supplied, primary sludge best enabled LA accumulation at a high concentration (1.3 g COD L–1) and yield (167 mgCOD/gVS). CONCLUSION This study demonstrates that the reactor pH is a key factor to stimulate LA acid fermentation and its accumulation. Under acidic conditions, LA accumulated in the system instead of being converted to volatile fatty acids (VFAs); this was likely due to the inhibition of the microbial community responsible for VFAs production. Uncontrolled pH condition impacts positively the overall fermentation cost since the alkalinizing agents used to keep pH neutral are not required and simplifies the downstream processes for LA extraction and purification. © 2021 Society of Chemical Industry (SCI).

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“…Another advantage of the production of lactic acid by fermentation is the possibility of using agro-industrial residues, such as eucalyptus enzymatic hydrolysate [8], orange peel waste hydrolysate [9], microalgae [10], waste cooking oil glycerol [11], cassava bagasse [12] molasses [13,14], food waste [15], hydrolyzed cheese whey [3], brown rice [16],…”

Section: Introductionmentioning

confidence: 99%

Production of L (+) Lactic Acid by Lactobacillus casei Ke11: Fed Batch Fermentation Strategies

et al. 2021

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Lactic acid and its derivatives are widely used in pharmaceutical, leather, textile and food industries. However, until now there have been few systematic reports on fed-batch fermentation for efficient production and high concentration of l-lactic acid by lactic acid bacteria. This study describes the obtainment of L (+) lactic acid from sucrose using the Lactobacillus casei Ke11 strain through different feeding strategies using an accessible pH neutralizer such as CaCO3. The exponential feeding strategy can increase lactic acid production and productivity (175.84 g/L and 3.74 g/L/h, respectively) with a 95% yield, avoiding inhibition by high initial substrate concentration and, combined with the selected agent controller, avoids the cellular stress that could be caused by the high osmotic pressure of the culture media. The purification of the acid using charcoal and celite, followed by the use of a cation exchange column proved to be highly efficient, allowing a high yield of lactic acid, high removal of sugars and proteins. The described process shows great potential for the production of lactic acid, as well as the simple, efficient and low-cost purification method. This way, this work is useful to the large-scale fermentation of L. casei Ke11 for production of l-lactic acid.

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Bioconversion of waste cooking oil glycerol from cabbage extract to lactic acid by Rhizopus microsporus

Cited by 14 publications

References 19 publications

Lactic acid production: Utilization of yam peel hydrolysate as a substrate using Rhizopus orysae in kinetic studies

Lactic acid production: Utilization of yam peel hydrolysate as a substrate using Rhizopus orysae in kinetic studies

Effect of pH on lactic acid fermentation of food waste using different mixed culture inocula

Production of L (+) Lactic Acid by Lactobacillus casei Ke11: Fed Batch Fermentation Strategies

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