Fatty acid feedstock preparation and lactic acid production as integrated processes in mixed restaurant food and bakery wastes treatment

Pleißner, Daniel; Lau, Kin Yan; Schneider, Roland; Venus, Joachim; Lin, Carol Sze Ki

doi:10.1016/j.foodres.2014.11.048

Cited by 59 publications

(15 citation statements)

References 38 publications

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“…A free lactic acid solution was achieved after bipolar electrodialysis, together with a NaOH solution. Both electrodialyses were carried out in batch mode, under constant polarity and at a temperature of 35 • C. Monopolar electrodialysis was composed by a sheet flow stack having 11 cation exchange membranes Type II (Fujifilm, Tilburg, the Netherlands) and 10 anion exchange membranes Type II (Fujifilm), operating at 20 V and 3 A. Conductivity values of the diluate below 0.5 mS cm −1 indicated the end of the process [6].…”

Section: Electrodialysismentioning

confidence: 99%

“…The downstream process during biological manufacturing of LA is still an important challenge, further complicated by the utilization of cheap and complex substrates. Efficient LA production has been reported from various alternative substrates such as sugarcane, food waste, coffee pulp, acid whey, molasses or avocado seeds to name a few [4][5][6][7][8][9]. Recently, there has been a lot of interest in lignocellulosic materials as fermentation feedstocks [9,10]; nevertheless, other easier accessible substrates can be taken into consideration for the production of LA.…”

Section: Introductionmentioning

confidence: 99%

“…B. coagulans is a very promising candidate for lactic acid production due to its temperature resistance, robustness and high LA productivity [17]. B. coagulans was also used as a platform organism in multi-substrate utilization [6].…”

Section: Introductionmentioning

confidence: 99%

“…However, most of these methods have only been tested in model lactic acid solutions or in well-defined media. Only a few studies so far have performed downstream separation of lactic acid from complex fermentation media [6,13,14,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Production and Purification of l-lactic Acid in Lab and Pilot Scales Using Sweet Sorghum Juice

et al. 2019

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Sweet sorghum juice (SSJ) was evaluated as fermentation substrate for the production of l-lactic acid. A thermophilic Bacillus coagulans isolate was selected for batch fermentations without the use of additional nutrients. The first batch of SSJ (Batch A) resulted on higher lactic acid concentration, yield and productivity with values of 78.75 g∙L−1, 0.78 g∙g−1 and 1.77 g∙L−1 h−1, respectively. Similar results were obtained when the process was transferred into the pilot scale (50 L), with corresponding values of 73 g∙L−1, 0.70 g∙g−1 and 1.47 g∙L−1 h−1. A complete downstream process scheme was developed in order to separate lactic acid from the fermentation components. Coarse and ultra-filtration were employed as preliminary separation steps. Mono- and bipolar electrodialysis, followed by chromatography and vacuum evaporation were subsequently carried out leading to a solution containing 905.8 g∙L−1 lactic acid, with an optical purity of 98.9%. The results of this study highlight the importance of the downstream process with respect to using SSJ for lactic acid production. The proposed downstream process constitutes a more environmentally benign approach to conventional precipitation methods.

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Section: Electrodialysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Production and Purification of l-lactic Acid in Lab and Pilot Scales Using Sweet Sorghum Juice

et al. 2019

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“…On the other hand, FA have been considered as alternative useful resources for the production of biofuels, chemicals, or human functional food products when recovered to higher concentration from wastewaters through various processes (Carlsson et al 2011;Meier et al 2007). The use of FA in chemical, material and fuel productions initiated considerable interest of industries to render inexpensive sources such as food wastes accessible (Pleissner et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of fatty acid harvesting by novel carbon-based adsorbent

Cuong

Kang

2015

Environ Sci Pollut Res

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In this study, separation and concentration of fatty acids (FA) from the synthetic food processing wastewater containing low concentration of FA (250 mg/L) were investigated using expanded graphite (EG) as a novel adsorbent at different temperatures (298~318 K). The adsorption results were further analyzed to verify adsorption mechanisms and thermodynamics of FA onto EG. Results show that the adsorption of FA onto EG was explained well by the Langmuir model with the maximum adsorption capacity up to 8.01 g FA/g EG at 298 K, and considerably affected by temperature. The adsorption kinetics fitted with pseudo-second-order kinetic model and the adsorption mechanism analysis showed that the intraparticle diffusion was not the rate-limiting step, but the coalescence of FA droplets played the significant role for novel adsorption of FA onto EG. The calculated activation energy and thermodynamic parameters such as Gibbs free energy change (ΔG(0)), enthalpy change (ΔH(0)), and entropy change (ΔS(0)) indicated that the adsorption of FA onto EG was very feasible, was highly spontaneous, occurred physically, was exothermic in nature, and was stable in aquatic environmental changes. Overall, FA can be effectively harvested and concentrated from the food processing wastewater by EG even at low concentration.

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Heterotrophic cultivation of Galdieria sulphuraria under non‐sterile conditions in digestate and hydrolyzed straw

Pleißner

2022

Chemie Ingenieur Technik

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Fatty acid feedstock preparation and lactic acid production as integrated processes in mixed restaurant food and bakery wastes treatment

Cited by 59 publications

References 38 publications

Production and Purification of l-lactic Acid in Lab and Pilot Scales Using Sweet Sorghum Juice

Production and Purification of l-lactic Acid in Lab and Pilot Scales Using Sweet Sorghum Juice

Thermodynamic analysis of fatty acid harvesting by novel carbon-based adsorbent

Heterotrophic cultivation of Galdieria sulphuraria under non‐sterile conditions in digestate and hydrolyzed straw

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