Recovery of lactic acid and other organic acids from food waste ethanol fermentation stillage: Feasibility and effects of substrates

Ma, Haile; Yue, Siyuan; Li, Hongai; Wang, Qunhui; Tu, Maobing

doi:10.1016/j.seppur.2018.07.031

Cited by 38 publications

(16 citation statements)

References 39 publications

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“…The main advantage of EDBM is the absence of chemical additions for adjusting the pH of the solution under treatment, which makes it particularly attractive in the food and pharmaceutical sectors where decreasing environmental pollution is one of the main actual concerns. It has a wide range of potential applications in such processes as the deacidification of fruit juices [ 1 ], the demineralization of whey proteins [ 2 ], the separation of organic acids produced by fermentation [ 3 ], etc. The production of casein, the major milk protein, by means of EDBM is a very interesting method in the sustainable development context due to the high product purity, and the absence of waste generation and hazardous reagents [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Fouling Mitigation by Optimizing Flow Rate and Pulsed Electric Field during Bipolar Membrane Electroacidification of Caseinate Solution

2021

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The efficiency of separation processes using ion exchange membranes (IEMs), especially in the food industry, is significantly limited by the fouling phenomenon, which is the process of the attachment and growth of certain species on the surface and inside the membrane. Pulsed electric field (PEF) mode, which consists in the application of constant current density pulses during a fixed time (Ton) alternated with pause lapses (Toff), has a positive antifouling impact. The aim of this study was to investigate the combined effect of three different relatively high flow rates of feed solution (corresponding to Reynolds numbers of 187, 374 and 560) and various pulse–pause ratios of PEF current regime on protein fouling kinetics during electrodialysis with bipolar membranes (EDBM) of a model caseinate solution. Four different pulse/pause regimes (with Ton/Toff ratios equal to 10 s/10 s, 10 s/20 s, 10 s/33 s and 10 s/50 s) during electrodialysis (ED) treatment were evaluated at a current density of 5 mA/cm2. It was found that increasing the pause duration and caseinate solution flow rate had a positive impact on the minimization of protein fouling occurring on the cationic surface of the bipolar membrane (BPM) during the EDBM. Both a long pause and high flow rate contribute to a more effective decrease in the concentration of protons and caseinate anions at the BPM surface: a very good membrane performance was achieved with 50 s of pause duration of PEF and a flow rate corresponding to Re = 374. A further increase in PEF pause duration (above 50 s) or flow rate (above Re = 374) did not lead to a significant decrease in the amount of fouling.

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Section: Introductionmentioning

confidence: 99%

Fouling Mitigation by Optimizing Flow Rate and Pulsed Electric Field during Bipolar Membrane Electroacidification of Caseinate Solution

2021

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“…In general, a significant concentration difference of the solutions in the base chamber and in the feed chamber can generally result in the reverse diffusion, which thus renders the increased conductivity solution in the feed chamber. Meanwhile, the ion concentration in the base chamber no longer shows an increasing trend . Therefore, in this case, the increase rates of the S -2-amino-1-butanol concentrations show a gradual decrease trend with BP-C-BP configuration equipped with different CEMs.…”

Section: Results and Discussionmentioning

confidence: 81%

Conversion of S-2-amino-1-butanol-l-tartrate to S-2-amino-1-butanol by Using Bipolar Membrane Electrodialysis for Post-treatment of Direct Enantioseparation

Tang

Liao

et al. 2021

ACS Sustainable Chem. Eng.

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In this work, a green route for the preparation of S-2-amino-1-butanol in the post-treatment for direct enantioseparation for the antituberculosis drug ethambutol hydrochloride has been explored. Therein, OH − produced from bipolar membrane electrodialysis (BMED) technology was used to in situ converse diastereomeric salt S-2-amino-1-butanol-L-tartrate to S-2-amino-1butanol, rather than directly adding the chemical reagent of NaOH or Na 2 CO 3 in a traditional way. For realization of the process, laboratory-scale BMEDs with two membrane stack configurations were fabricated, followed by an investigation of the effect of ionexchange membrane types, initial feed concentrations, voltages, etc. As a result, under optimized conditions, the concentration of as-obtained S-2-amino-1-butanol (the final purity of the product: ca. 98.2%) can achieve 1.04 mol•L −1 , and the conversion rate is 92.28%. The cost is estimated at approximately $2.22 kg −1 . Accordingly, the current efficiency and energy consumption are 54.05% and 1.88 kW•h•kg −1 , respectively. The investigation has verified the feasibility of BMED for the conversion of S-2-amino-1-butanol-L-tartrate to S-2-aminobutanol and also demonstrates potential application in the field of chiral compound separation.

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“…Some practical measurements have been carried out in various fields to enhance defluoridation efficiency. Pretreatment via ultrafiltration, nanofiltration and ceramic membrane can be performed to clarify and reduce turbidity before the ED operation . In practice, with a high number of cell pairs in the stack, the desalination rate could be magnified; because desalination depends on ionic transport in a conventional ED stack of concentrate compartment and dilute compartment, it is typical to have several hundreds of cell pairs stacked between the electrodes in industrial ED stacks .…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the feasibility of short‐term electrodialysis for separating naturally occurring fluoride from instant brick tea infusion

et al. 2019

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BACKGROUND: Removing excessive naturally occurring fluoride from tea and/or infusions is difficult because the process has low efficiency and causes secondary pollution. In this study, a novel electrodialysis (ED) technology was developed. We examined the effect of crucial parameters (electrolyte concentration, operation voltage, ED duration and initial concentration of the tea infusion) on defluoridation performance using a highly efficient ion-exchange membrane with five-compartment cells. RESULTS:The most effective ED system results were obtained at an electrolyte concentration of 10 g kg −1 and operating voltage of 20 V. Moreover, the fluoride removal capacity (10.70-66.93%) was highly dependent on the ED duration (1-15 min) and initial concentration of the tea infusion (0.5-10 g kg −1 ). The longer the ED duration and the lower the initial concentration, the higher was the defluoridation performance. During ED, limited loss of the main inclusions (total polyphenols, catechins, caffeine and selected ions) was observed. Furthermore, the D201 anion resin-filled ED stack (0.5-5 g) and improvement of concentrate compartment electrolyte (≥5 times the dilute compartment electrolyte) in the ED system enhanced the defluoridation rate significantly. CONCLUSION: ED is a potentially effective method that can be used for defluoridation in the deep processing of tea products. (Wan) † Chuan-yi Peng and Hai-feng Liu contributed equally to this work.Figure 4. Effect of ED duration on defluoridation capacity. ED process parameters were 20 V operation voltage, 10 g kg −1 initial concentration of the tea infusion, 10 g kg −1 electrolyte concentration and 30 L h −1 flow rate.

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Recovery of lactic acid and other organic acids from food waste ethanol fermentation stillage: Feasibility and effects of substrates

Cited by 38 publications

References 39 publications

Fouling Mitigation by Optimizing Flow Rate and Pulsed Electric Field during Bipolar Membrane Electroacidification of Caseinate Solution

Fouling Mitigation by Optimizing Flow Rate and Pulsed Electric Field during Bipolar Membrane Electroacidification of Caseinate Solution

Conversion of S-2-amino-1-butanol-l-tartrate to S-2-amino-1-butanol by Using Bipolar Membrane Electrodialysis for Post-treatment of Direct Enantioseparation

Evaluation of the feasibility of short‐term electrodialysis for separating naturally occurring fluoride from instant brick tea infusion

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