Enhanced production of lactic acid with reducing excess sludge by lactate fermentation

Maeda, Takeyasu; Yoshimura, Takayuki; Shimazu, Tomohiko; Shirai, Yoshihito; Ogawa, Hiroaki

doi:10.1016/j.jhazmat.2009.02.067

Cited by 38 publications

(10 citation statements)

References 47 publications

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“…Scientific reports show that the health-promoting properties of 2-hydroxypropionic acid result from the fact that this acid neutralises the electrochemical potential of cell membranes, denatures intracellular proteins and reduces pH in cells of pathogenic microflora (Ebringer et al, 2008;Satir & Guzel-Seydim, 2015;Rahmawati & Suntornsuk, 2016). Moreover, lactic acid accelerates protein digestion in the alimentary tract, enhances the absorbability of ions of calcium, iron and phosphorus, stimulates secretion of digestive juices and accelerates intestine peristalsis (Maeda et al, 2009;Elfahri et al, 2016). The presence of lactic acid-producing bacteria and their metabolites account for many properties of fermented milk.…”

Section: Introductionmentioning

confidence: 99%

Lactose hydrolysis and lactase activity in fermented mixtures containing mare's, cow's, sheep's and goat's milk

Cais‐Sokolińska

Wójtowski

Pikul

2016

Int J of Food Sci Tech

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Summary The degree of lactose hydrolysis and exogenous lactase activity of fermented mare's milk (MM) mixed with cow's (CM), sheep's (SM) and goat's milk (GM) was investigated. Moreover, the overall sensory desirableness of the novel products was also evaluated. A mixture MM + CM, or MM + GM, or MM + SM at a 1:1 ratio, significantly reduced the amount of contained lactose (P < 0.05). Fermented MM + SM mixture may be considered the product with the greatest potential consumer desirability. This particular product is preferable for patients with secondary lactose intolerance. Its additional advantage is connected with the predicted course of fermentation assessed on the basis of changes in pH, the count of mesophilic LAB and yeast as well as their survival rates during storage.

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Section: Introductionmentioning

confidence: 99%

Lactose hydrolysis and lactase activity in fermented mixtures containing mare's, cow's, sheep's and goat's milk

Cais‐Sokolińska

Wójtowski

Pikul

2016

Int J of Food Sci Tech

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“…The analysis of variance (ANOVA) for the response surface full quadratic model is given in 2 2 ) were more significant than the other terms (P-values are less than 0.01). The P-value>0.05 means that the model terms are insignificant.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3] Lactic acid can be produced either by fermentation or by chemical synthesis. But the biotechnological fermentation process has received significant importance due to environmental concerns, use of renewable resources instead of petrochemicals, low production temperature, low energy requirements, and high purity.…”

Section: Introductionmentioning

confidence: 99%

Statistical Optimization of Dilute Acid Hydrolysis of Wood Sawdust for Lactic Acid Production

Nancib¹

2017

JABB

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Abbreviations: SW, sawdust wood; CCD, central composite design; LAB, lactic acid bacteria; L-LDH, L-lactate dehydrogenase; RSM, response surface methodology; 3D, 3-dimensional; MSW, meranti wood sawdust; OFI, Opuntia ficus indica IntroductionLactic acid has a wide application in food, pharmaceutical, leather, cosmetic applications, textile, and polylactic acid industries.1-3 Lactic acid can be produced either by fermentation or by chemical synthesis. But the biotechnological fermentation process has received significant importance due to environmental concerns, use of renewable resources instead of petrochemicals, low production temperature, low energy requirements, and high purity. Mammalian cells only contain L-lactate dehydrogenase (L-LDH), so L(+) form of lactic acid is used for food and drug industry, because the human body is only adapted to assimilate this form by the action of the enzyme L-LDH whereas D-lactic acid is often harmful to human metabolism, his accumulation in the blood can cause acidosis. 4,5 Lactic acid can be synthesized by microbial fermentation of the various raw materials such as molasses, 6 whey, 7 and date juice. 8 As in any industrial organic acid or solvent fermentation, the main economic factors are the choice and cost of the substrate and the cost of recovery in downstream processing. Feedstock that would reduce the processing cost would greatly enhance the competitiveness of fermentative lactate production. Many efforts have been made to develop biotechnologies for lactate generation from such a cheap, abundant and renewable substrate. Recently, fermentation of non-food biomass has also gained considerable attention due to the forthcoming scarcity of fossil fuels and the increased lack of food and feed supplies over the world. Biomass of lignocelluloses is a low-cost and extensively available renewable carbon source as an alternative to the conventional feed stocks.9-11 Lignocellulosic biomass is primarily composed of cellulose, hemicellulose, and lignin. 12,13 A cellulosic feedstock (such as wood) has been widely used to replace refined sugar, and been utilized for the production of ethanol, 14,15 single cell protein, 16 xylitol 17 and organic acid such as lactic acid. 18The conversion of wood to lactic acid is more challenging due to the complex structure of the lingocellulose. The three polymers of Lignocellulosic biomass are arranged to form a highly recalcitrant structure, 19 hindering the availability of carbohydrates for fermentation processes, representing a high barrier for the bioconversion of lignocellulosic material. In fact it is necessary to pretreat the wood to alter its structural and chemical composition to facilitate hydrolysis of carbohydrates to fermentable sugars. 20,21 Pretreatment uses various techniques, including ammonia fiber explosion, chemical treatment, biological treatment, and steam explosion, to alter the structure of cellulosic biomass to make cellulose more accessible. Conversion of wood lignocellulosic biomass to glucose and other monomeric suga...

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“…The mobile phase used was 5 mM p-toluenesulfonate with flow rate of 0.8 mL/min. (23). Hydrogen and carbon dioxide from headspace of serum bottle were measured using gas chromatography with the thermal conductivity detector using nitrogen as a carrier gas (22).…”

Section: Methodsmentioning

confidence: 99%

Bioconversion of glycerol for bioethanol production using isolated Escherichia coli SS1

Suhaimi¹,

Phang²,

Maeda³

et al. 2012

Braz. J. Microbiol.

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Bioconverting glycerol into various valuable products is one of glycerol's promising applications due to its high availability at low cost and the existence of many glycerol-utilizing microorganisms. Bioethanol and biohydrogen, which are types of renewable fuels, are two examples of bioconverted products. The objectives of this study were to evaluate ethanol production from different media by local microorganism isolates and compare the ethanol fermentation profile of the selected strains to use of glucose or glycerol as sole carbon sources. The ethanol fermentations by six isolates were evaluated after a preliminary screening process. Strain named SS1 produced the highest ethanol yield of 1.0 mol: 1.0 mol glycerol and was identified as Escherichia coli SS1 Also, this isolated strain showed a higher affinity to glycerol than glucose for bioethanol production.

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Enhanced production of lactic acid with reducing excess sludge by lactate fermentation

Cited by 38 publications

References 47 publications

Lactose hydrolysis and lactase activity in fermented mixtures containing mare's, cow's, sheep's and goat's milk

Lactose hydrolysis and lactase activity in fermented mixtures containing mare's, cow's, sheep's and goat's milk

Statistical Optimization of Dilute Acid Hydrolysis of Wood Sawdust for Lactic Acid Production

Bioconversion of glycerol for bioethanol production using isolated Escherichia coli SS1

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