Biotechnological production of lactic acid integrated with potato wastewater treatment by <i>Rhizopus arrhizus</i>

Huang, Li; Jin, Bo; Lant, Paul; Zhou, Jiti

doi:10.1002/jctb.877

Cited by 74 publications

(52 citation statements)

References 36 publications

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“…The values were 423 and 2930 mg·L −1 , respectively, accounting for the reduction of 85% and 39% from the original PPW. This BOD reduction compares well to the previously presented reports [11], whereas the COD reduction can be considered more modest [27] [28]. However, the process optimization regarding the supplementation of nutrients may promote higher COD reduction.…”

Section: On the Techno-economic Aspects Of The Processsupporting

confidence: 66%

Conversion of Potato Peel Waste to Single Cell Protein by an Acidophilic Fungus

Taskila¹,

Ahokas²,

Sotaniemi³

et al. 2018

JWARP

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The aim of this research was to convert potato peel waste (PPW) to single cell protein (SCP), and to extract valuable phenolic compounds from the spent medium. PPW is an abundant by-product of potato processing industry, consisting mostly of starch, fibre and protein in a form of watery sludge. The PPW from a chip manufacturing plant was pre-treated with sulphuric acid, and used as a substrate for an acidophilic Scytalidium acidophilum fungus under non-aseptic conditions. The produced SCP had a promising amino acid composition to be used in animal feed. Phenolic compounds were not recovered from the spent medium, most likely due to the low pH in the medium. The present findings suggest that PPW is a suitable raw material for acidophilic SCP production, whilst the extraction of phenolic acids would require milder cultivation conditions or separation before pre-treatments of SCP production. The BOD5 of the PPW was reduced by in 98% due to fungal cultivation. Thus the feed production also served as an efficient means for reduction of organic load in the PPW.

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Section: On the Techno-economic Aspects Of The Processsupporting

confidence: 66%

Conversion of Potato Peel Waste to Single Cell Protein by an Acidophilic Fungus

Taskila¹,

Ahokas²,

Sotaniemi³

et al. 2018

JWARP

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“…The potato wastewater was collected from a starch process waste stream, Freer Foods Pty Ltd, Brisbane, Australia, mainly containing 15-30 g/l of potato starch, which was given in detail previously [11]. Otherwise as stated, this starch wastewater was used as a production medium throughout the investigation.…”

Section: Culture and Fermentation Mediummentioning

confidence: 99%

“…The biotechnological process can yield either form alone, or a mixture in different proportions of two isomers, depending on the microorganism, substrate and growth conditions used, whereas the chemical production only results in a mixture of the two isomers [4,6,7]. Another significant advantage over the chemical synthesis is that biological production can use cheap raw materials, such as whey, molasses, starch waste, beet-sugar and canesugar and other carbohydrate-rich materials [7][8][9][10][11][12][13][14][15]. In commercial processes, sugars and starches are widely used as substrates for biological production of lactic acid.…”

Section: Introductionmentioning

confidence: 99%

“…performed simultaneously. This method eliminates the need for a complete hydrolysis step prior to the fermentation step and enzymatic hydrolysis, cell growth and microbial production occur simultaneously [9,11,[29][30][31]]. Another direct benefit of this process is a decrease in the inhibition caused by glucose accumulation, leading to an increase in the saccharification rate, consequently increasing productivity and reducing reactor volume and capital costs [32].…”

Section: Introductionmentioning

confidence: 99%

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Direct fermentation of potato starch wastewater to lactic acid by Rhizopus oryzae and Rhizopus arrhizus

Huang

Jin

Lant

2005

Bioprocess Biosyst Eng

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The biochemical kinetic of direct fermentation for lactic acid production by fungal species of Rhizopus arrhizus 3,6017 and Rhizopus oryzae 2,062 was studied with respect to growth pH, temperature and substrate. The direct fermentation was characterized by starch hydrolysis, accumulation of reducing sugar, and production of lactic acid and fungal biomass. Starch hydrolysis, reducing sugar accumulation, biomass formation and lactic acid production were affected with the variations in pH, temperature, and starch source and concentration. A growth condition with starch concentration approximately 20 g/l at pH 6.0 and 30 degrees C was favourable for both starch saccharification and lactic acid fermentation, resulting in lactic acid yield of 0.87-0.97 g/g starch associated with 1.5-2.0 g/l fungal biomass produced in 36 h fermentation. R. arrhizus 3,6017 had a higher capacity to produce lactic acid, while R. oryzae 2,062 produced more fungal biomass under similar conditions.

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“…Lactic acid has numerous applications in the food and cosmetics industries as well as in the manufacture of biodegradable plastics (Datta & Henry, 2006) and as a precursor of other chemicals and biocompatible materials with medical applications (Martinez, et al, 2013). A common route for the production of lactic acid is through the hydrolysis of lactonitrile, which is obtained from the reaction between acetaldehyde and hydrogen cyanide (Huang, Jin, Lant, & Zhou, 2003;Martinez, et al, 2013). Lactic acid may also be produced from fermentation of various materials consisting of monosaccharides and disaccharides, starchy materials, and lignocellulosic hydrolyzates by microorganisms such as lactic acid bacteria (Martinez, et al, 2013 It has previously been demonstrated that the fruit peel of C. microcarpa has volatile oil and the residue left after the extraction of oil can be used in the production of pectin (Anzaldo & Briones, 1993).…”

Section: Introductionmentioning

confidence: 99%

Bioconversion of Citrofortunella Microcarpa Fruit Waste Into Lactic Acid by Lactobacillus Plantarum

Ortinero¹,

Mariano²,

Kalaw³

et al. 2017

J. Ecol. Eng.

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The processing of Citrofortunella mircocarpa fruit juice generates large volume of solid waste, causing disposal problem. Several studies have demonstrated that wastes from agricultural and food processing industries such as fruit and vegetable peels contain high amount of polysaccharides that can be transformed into useful chemicals, including lactic acid, through fermentation. Lactic acid is widely used in various industries, such as in the manufacture of biodegradable plastic, and the demand for this chemical justifies the search of renewable feedstock for its biotechnological production. This study aimed to produce lactic acid from C. microcarpa fruit waste biomass through fermentation with Lactobacillus plantarum. The hydrolysate from C. microcarpa fruit waste was prepared, inoculated with different amounts of L. plantarum cell suspension, and incubated for three days. Lactic acid production was monitored daily. The lactic acid produced from the fermentation was recovered as calcium lactate and lactic acid crystals. The identity of the crystals was evaluated using Fourier transform infrared spectroscopy (FTIR) spectroscopy and paper chromatography. The highest lactic acid production was observed in fermentation mixtures containing the highest number of L. plantarum cells. Within three days of fermentation, the amount of lactic acid production increased with increasing period of incubation. Partial characterization of the crystals recovered from the fermentation mixtures by FTIR spectroscopy showed that the peaks in the spectrum were consistent with the chemical structure of lactate. Paper chromatography results likewise confirmed that the crystals are lactate. C. microcarpa fruit waste can afford lactic acid when fermented with L. plantarum. The results of the study may serve as basis for the development of technology for the utilization of C. microcarpa fruit waste biomass as renewable resource for industrial production of lactic acid.

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Biotechnological production of lactic acid integrated with potato wastewater treatment by Rhizopus arrhizus

Cited by 74 publications

References 36 publications

Conversion of Potato Peel Waste to Single Cell Protein by an Acidophilic Fungus

Conversion of Potato Peel Waste to Single Cell Protein by an Acidophilic Fungus

Direct fermentation of potato starch wastewater to lactic acid by Rhizopus oryzae and Rhizopus arrhizus

Bioconversion of Citrofortunella Microcarpa Fruit Waste Into Lactic Acid by Lactobacillus Plantarum

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