scholarly journals MODELING OF ESSENTIAL OIL EXTRACTION PROCESS: APPLICATION FOR ORANGE, POMELO, AND LEMONGRASS

2018 ◽  
Vol 56 (4A) ◽  
pp. 182
Author(s):  
Thanh Nguyen Dang Binh ◽  
Dung Nguyen Trung ◽  
Duc Hong Ta
Keyword(s):  
Large Scale ◽  
Scale Up ◽  
Extraction Process ◽  
Model Parameters ◽  
Two Stage ◽  
Kinetic Rate ◽  
Kinetic Mechanisms ◽  
Extraction Processes ◽  
Solid Liquid ◽  
Kinetics Of

ABSTRACT - HCTN - 44In this study, the kinetic models of steam distillation of orange (Citrus Sinensis (L.) Osbeck), pomelo (Citrus grandis L.), and lemongrass (Cymbopogon Citratus) for the recovery of essential oils were developed. The model parameters were estimated based on experimental data and comprehensive kinetic mechanisms of the solid-liquid extraction process. Numerical results showed that, the extraction mechanism of the three materials were best fit to the Patricelli two-stage model in which the diffusion of the oil was followed by the washing step. Moreover, the model parameters obtained from the measured data reflected clearly the nature of the two-stage extraction at which the kinetic rate of the washing step (surface extraction) was higher than that of in-tissue diffusion step. Thus, the kinetics of the extraction processes obtained from the present work could be used for the scale-up of the extraction process operating at a large scale and for the purpose of process control as well.

Experimental and Kinetic Production of Ethanol Using Mucilage Juice Residues from Cocoa Processing

2018 ◽  
Vol 16 (11) ◽  
Author(s):  
Teresa Romero Cortes ◽  
Jaime A. Cuervo-Parra ◽  
Víctor José Robles-Olvera ◽  
Eduardo Rangel Cortes ◽  
Pablo A. López Pérez
Keyword(s):  
Ethanol Yield ◽  
Scale Up ◽  
Pilot Scale ◽  
Product Formation ◽  
Model Parameters ◽  
Pichia Kudriavzevii ◽  
Proposed Model ◽  
Analysis Of Results ◽  
Residual Plots ◽  
Kinetics Of

AbstractEthanol was produced using mucilage juice residues from processed cocoa with Pichia kudriavzevii in batch fermentation. Experimental results showed that maximum ethanol concentration was 13.8 g/L, ethanol yield was 0.50 g-ethanol/g glucose with a productivity of 0.25 g/L h. Likewise, a novel phenomenological model based on the mechanism of multiple parallel coupled reactions was used to describe the kinetics of substrate, enzyme, biomass and product formation. Model parameters were optimized by applying the Levenberg-Marquardt approach. Analysis of results was based on statistical metrics (such as confidence interval), sensitivity and by comparing calculated curves with the experimental data (residual plots). The efficacy of the proposed mathematical model was statistically evaluated using the dimensionless coefficient for efficiency. Results indicated that the proposed model can be applied as a way of augmenting bioethanol production from laboratory scale up to semi-pilot scale.

scholarly journals Two-stage battery recharge scheduling and vehicle-charger assignment policy for dynamic electric dial-a-ride services

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0251582
Author(s):  
Tai-Yu Ma
Keyword(s):  
Large Scale ◽  
Waiting Times ◽  
Model Parameters ◽  
Two Stage ◽  
Charging Infrastructure ◽  
Solution Approach ◽  
Charging Station ◽  
Total Vehicle ◽  
Vehicle Charging ◽  
The Impact

Coordinating the charging scheduling of electric vehicles for dynamic dial-a-ride services is challenging considering charging queuing delays and stochastic customer demand. We propose a new two-stage solution approach to handle dynamic vehicle charging scheduling to minimize the costs of daily charging operations of the fleet. The approach comprises two components: daily vehicle charging scheduling and online vehicle–charger assignment. A new battery replenishment model is proposed to obtain the vehicle charging schedules by minimizing the costs of vehicle daily charging operations while satisfying vehicle driving needs to serve customers. In the second stage, an online vehicle–charger assignment model is developed to minimize the total vehicle idle time for charges by considering queuing delays at the level of chargers. An efficient Lagrangian relaxation algorithm is proposed to solve the large-scale vehicle-charger assignment problem with small optimality gaps. The approach is applied to a realistic dynamic dial-a-ride service case study in Luxembourg and compared with the nearest charging station charging policy and first-come-first-served minimum charging delay policy under different charging infrastructure scenarios. Our computational results show that the approach can achieve significant savings for the operator in terms of charging waiting times (–74.9%), charging times (–38.6%), and charged energy costs (–27.4%). A sensitivity analysis is conducted to evaluate the impact of the different model parameters, showing the scalability and robustness of the approach in a stochastic environment.

scholarly journals STUDY THE GROWTH KINETICS OF PEDIOCOCCUS ACIDILACTICI WITH ESTIMATION OF KINETIC PARAMETERS AND APPLIED IN LARGE SCALE PEDIOCIN PRODUCTION

2016 ◽  
Vol 9 (5) ◽  
pp. 130
Author(s):  
Barnali Mandal
Keyword(s):  
Experimental Data ◽  
Lactic Acid ◽  
Kinetic Parameters ◽  
Growth Kinetics ◽  
Large Scale ◽  
Scale Up ◽  
Small Scale ◽  
Pediococcus Acidilactici ◽  
Monod Model ◽  
Kinetics Of

ABSTRACTObjectives: The aim of the study was to determine the growth kinetics of Pediococcus acidilactici using a mathematical model for large scale pediocinproduction.Methods: Growth kinetics of P. acidilactici has been studied for pediocin production in small scale batch fermenter (Erlenmeyer flask) using meatprocessing waste medium. The experiments have been conducted with varying the concentrations of glucose, protein, and lactic acid. A mathematicalmodel has been developed to describe growth rate, products (pediocin and lactic acid) formation rate, and substrates (glucose and protein) utilizationrate. Monod model for dual substrates (glucose and protein) has been used with considering lactic acid inhibition. Luedeking-Piret model has beenintroduced to describe the production of pediocin and lactic acid.Results: The values of kinetic parameters have been determined using experimental data and model equations. The model prediction has beencompared satisfactorily with the experimental data for the validation of the model.Conclusions: The developed model was satisfactorily validated to scale up the production of pediocin.Keywords: Pediococcus acidilactici, Pediocin, Meat processing waste, Monod model, Luedeking-Piret model, Kinetic parameters.

DIZZY: STOCHASTIC SIMULATION OF LARGE-SCALE GENETIC REGULATORY NETWORKS

2005 ◽  
Vol 03 (02) ◽  
pp. 415-436 ◽  
Author(s):  
STEPHEN RAMSEY ◽  
DAVID ORRELL ◽  
HAMID BOLOURI
Keyword(s):  
Regulatory Networks ◽  
Large Scale ◽  
Software Tool ◽  
Genetic Regulatory Networks ◽  
Signaling Networks ◽  
Simulation Framework ◽  
Kinetic Rate ◽  
Rate Laws ◽  
Reaction Processes ◽  
Kinetics Of

We describe Dizzy, a software tool for stochastically and deterministically modeling the spatially homogeneous kinetics of integrated large-scale genetic, metabolic, and signaling networks. Notable features include a modular simulation framework, reusable modeling elements, complex kinetic rate laws, multi-step reaction processes, steady-state noise estimation, and spatial compartmentalization.

scholarly journals Optimization and Kinetics of the Solid-liquid Extraction Process of Polyphenols from Black Mulberry Fruit

2019 ◽  
Vol 70 (3) ◽  
pp. 853-858 ◽  
Author(s):  
Emilija Kostic ◽  
Goran M. Nikolic ◽  
Snezana Mitic ◽  
Danica Dimitrijevic ◽  
Milan Mitic
Keyword(s):  
Extraction Process ◽  
Liquid Extraction ◽  
Operating Conditions ◽  
Total Phenolic ◽  
Extraction Techniques ◽  
Dry Extract ◽  
Morus Nigra ◽  
Mulberry Fruit ◽  
Solid Liquid ◽  
Kinetics Of

This paper investigates the influence of operating conditions and extraction techniques (maceration and ultrasonic) on the yield and extraction of dry extract, total phenolic, flavonoids and anthocyanins from black mulberry fruit (Morus nigra L.). The optimal extraction conditions and kinetic parameters of the extraction process are determined.

scholarly journals Study of Extraction Kinetics of Total Polyphenols from Curry Leaves

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Sunita S. Patil ◽  
Umesh B. Deshannavar ◽  
M. Ramasamy ◽  
Sampath Emani ◽  
Nima Khalilpoor ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Extraction Process ◽  
Polyphenol Content ◽  
Total Polyphenols ◽  
Total Polyphenol ◽  
Batch Extraction ◽  
Total Polyphenol Content ◽  
Curry Leaves ◽  
Solid Liquid ◽  
Kinetics Of

Solid-liquid batch extraction of total polyphenol content from curry leaves (Murraya koenigii L.) was studied in this paper. The effect of different solvent concentrations and temperatures on total polyphenol content was investigated by performing batch experiments. The experimental studies showed that the kinetics of solid-liquid batch extraction was influenced by different solvent concentrations and temperatures. In solid-liquid batch extraction, more recovery of total polyphenols was obtained for 50% (v/v) aqueous methanol and at 333 K temperature. The total polyphenol obtained at optimum conditions was 79.34 mgGAE/L. Mathematical modelling is an important engineering tool used to study the kinetics of extraction as well as in the design of the extraction process to reduce time, energy, and chemical reagents. Peleg and Power law, the two mathematical models, were used to study the kinetics of the batch extraction process. The Peleg model showed the best fit to explain the kinetics of process with R2 > 0.99. Further conventional extraction methods are compared with the novel extraction method.

Kinetics of the Solid-Liquid Extraction Process of Phenolic Antioxidants and Antioxidant Capacity from Hop (Humulus lupulus L.)

2014 ◽  
Vol 50 (11) ◽  
pp. 1658-1664 ◽  
Author(s):  
Dušan Đ. Paunović ◽  
Snežana S. Mitić ◽  
Gordana S. Stojanović ◽  
Milan N. Mitić ◽  
Branka T. Stojanović ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Humulus Lupulus ◽  
Phenolic Antioxidants ◽  
Humulus Lupulus L ◽  
Solid Liquid Extraction ◽  
Solid Liquid ◽  
Kinetics Of

scholarly journals Heterotrophy as a tool to overcome the long and costly autotrophic scale-up process for large scale production of microalgae

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
A. Barros ◽  
H. Pereira ◽  
J. Campos ◽  
A. Marques ◽  
J. Varela ◽  
...  
Keyword(s):  
Large Scale ◽  
Scale Up ◽  
Biomass Concentration ◽  
Growth Conditions ◽  
Pilot Scale ◽  
Industrial Scale ◽  
Scale Production ◽  
Two Stage ◽  
Chlorophyll Contents ◽  
Large Scale Production

Abstract Industrial scale-up of microalgal cultures is often a protracted step prone to culture collapse and the occurrence of unwanted contaminants. To solve this problem, a two-stage scale-up process was developed – heterotrophically Chlorella vulgaris cells grown in fermenters (1st stage) were used to directly inoculate an outdoor industrial autotrophic microalgal production unit (2nd stage). A preliminary pilot-scale trial revealed that C. vulgaris cells grown heterotrophically adapted readily to outdoor autotrophic growth conditions (1-m3 photobioreactors) without any measurable difference as compared to conventional autotrophic inocula. Biomass concentration of 174.5 g L−1, the highest value ever reported for this microalga, was achieved in a 5-L fermenter during scale-up using the heterotrophic route. Inocula grown in 0.2- and 5-m3 industrial fermenters with mean productivity of 27.54 ± 5.07 and 31.86 ± 2.87 g L−1 d−1, respectively, were later used to seed several outdoor 100-m3 tubular photobioreactors. Overall, all photobioreactor cultures seeded from the heterotrophic route reached standard protein and chlorophyll contents of 52.18 ± 1.30% of DW and 23.98 ± 1.57 mg g−1 DW, respectively. In addition to providing reproducible, high-quality inocula, this two-stage approach led to a 5-fold and 12-fold decrease in scale-up time and occupancy area used for industrial scale-up, respectively.

scholarly journals The Influence of Woven Fabric Structure on Kinetics of Water Sorption

2014 ◽  
Vol 9 (1) ◽  
pp. 155892501400900
Author(s):  
Mohamed Hamdaoui ◽  
Nesma Sawssen Achour ◽  
Sassi Ben Nasrallah
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Water Sorption ◽  
Cotton Fabrics ◽  
Woven Fabric ◽  
Model Parameters ◽  
Kinetic Rate ◽  
Weave Structure ◽  
Fabric Structure ◽  
Kinetics Of

In this paper, the results of an experimental study designed to determine the kinetics of water sorption on cotton fabrics are presented. The dynamic water sorption of cotton fabrics was gravimetrically investigated at 20°C by using an experimental device, which assured the vertical suspension of the cloth surface and permitted the measurement of the mass of liquid rising in the fabric. A good fit of the experimental data with the parallel exponential kinetics model was found. The results show that the weave structure and the number of yarns per centimeter had a significant influence on the model parameters and the kinetic rate of sorption.

scholarly journals Study of the Kinetics of Extraction Process for The Production of Hemp Inflorescences Extracts by Means of Conventional Maceration (CM) and Rapid Solid-Liquid Dynamic Extraction (RSLDE)

Separations ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 20 ◽  
Author(s):  
Monica Gallo ◽  
Andrea Formato ◽  
Martina Ciaravolo ◽  
Gaetano Formato ◽  
Daniele Naviglio
Keyword(s):  
High Performance ◽  
Solid Material ◽  
Extraction Process ◽  
Extraction Yield ◽  
Amount Of Substance ◽  
Cannabidiolic Acid ◽  
Before And After ◽  
Dynamic Extraction ◽  
Solid Liquid ◽  
Kinetics Of

In the present work, the kinetics of the extraction process from female inflorescences of Canapa sativa subsp. sativa var. sativa were studied, on the basis of determination of the content of cannabinoids: cannabidiolic acid (CBDA), Δ9-tetrahydrocannabinolic acid (THCA), cannabidiol (CBD) and Δ9-tetrahydrocannabinol (THC), before and after decarboxylation in the oven, in order to evaluate the possible use of the hemp extract obtained in the food sector. Therefore, both conventional maceration (CM) and rapid solid-liquid dynamic extraction (RSLDE), also known as cyclically pressurized extraction (CPE), were carried out, using parts of the plant approximately of the same size. The alcoholic extracts thus obtained were analyzed by high-performance liquid chromatography (HPLC) in order to calculate the percentages of cannabinoids present in the inflorescences and thus be able to evaluate the degree of decarboxylation. Furthermore, the extracts were dried to calculate the percentage of solid material present in it, that was made mainly by cannabinoids. The amount of substance extracted from the inflorescences was about 10% (w/w), for both cases considered. Therefore, the extraction yield was the same in the two cases examined and the final qualities were almost identical. However, the extraction times were significantly different. In fact, the maceration of hemp inflorescences in ethyl alcohol was completed in no less than 24 h, while with the RSLDE the extraction was completed in only 4 h. Finally, for a better understanding of the extraction process with cyclically pressurized extraction, a numerical simulation was carried out which allowed to better evaluate the influence of extractive parameters.

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