Towards an efficient membrane based vegetable oils refining

Pioch, Daniel; Larguèze, Christophe; Graille, Jean; Ajana, Hamid; Rouvière, J.

doi:10.1016/s0926-6690(97)00035-6

Cited by 33 publications

(27 citation statements)

References 1 publication

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“…At high temperature the solubility of soap in oil is greater. Meanwhile, at lower temperature oil tends to be in aggregates [8]. This will lead to easy occlusion of soaps formed with oil when the temperature is raised.…”

Section: Effect Of Temperaturementioning

confidence: 99%

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N on Dispersive Chemical Deacidification of Crude Palm Oil in Hollow Fiber Membrane Contactor

Purwasasmita

Nabu

Khoiruddin

et al. 2015

J. Eng. Technol. Sci.

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Abstract. Performance of chemical deacidification of crude palm oil (CPO) using aqueous NaOH solution in a polysulfone hollow fiber ultrafiltration membrane was investigated. The effects of operating temperature, NaOH concentration and flow rates on percentage of free fatty acids (FFA) removal, oil loss, soap entrainment and overall mass transfer coefficient were evaluated. Overall mass transfer coefficients, soap content in oil and neutral oil loss all increased when the temperature was increased from 60 to 70°C due to an increase of the FFA distribution value. A minimum 0.25 N of NaOH or a NaOH to FFA molar ratio of about 7.62 was required to facilitate the expected extraction efficiency. The increased oil flowrate slightly enhanced the solute transport kinetics, while the aqueous phase flowrate did not significantly influence deacidification efficiency or mass transfer coefficient. About 97% of FFA removal was achieved within 4 hours. The maximum oil loss observed was 11% and the highest soap content in the oil without separation step was 3150 ppm. The values of the overall mass transfer coefficient varied from 2.97×10 -7 to 7.71×10 -7 m/s. These results show the potential of using the non dispersive membrane contacting process for chemical deacidification of CPO as well as other vegetable oils.

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Section: Effect Of Temperaturementioning

confidence: 99%

“…Alkaline neutralization followed by microfiltration seems to be a potential solution for industrial application [8] as it achieved acceptable levels of FFA and phosphorus content. However, the refining efficiency, oil quality and percentage of recovery still need to be optimized.…”

mentioning

confidence: 99%

N on Dispersive Chemical Deacidification of Crude Palm Oil in Hollow Fiber Membrane Contactor

Purwasasmita

Nabu

Khoiruddin

et al. 2015

J. Eng. Technol. Sci.

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“…The results in Table 7 show that the change of temperature has an inversely proportional effect of coefficient of retention of TCC. The temperature might also reduce phospholipids micelle size in solution because the molecules of phospholipids did not aggregate together at high temperatures [23] that lead to pass through the membrane quickly and to minimize the fouling deposition. Through this experiment result, the maintenance of temperature at 40 • C is highly recommended for the gac oil filtration process because of its high flux permeates and relatively high effective retention of TCC.…”

Section: Effect Of Temperature On Permeate Flux and Coefficient Of Rementioning

confidence: 99%

Application of Cross-Flow Filtration Technique in Purification and Concentration of Juice from Vietnamese Fruits

Cang

2017

Beverages

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This study is to offer a 1st insight in the use of membrane process for the purification and concentration of Vietnamese fruit juices: cashew apple (Anacardium occidentale Line.), dragon fruit (Cactus hémiépiphytes), pineapple (Ananas comosus), pomelo (Citrus grandis L.), and gac aril oil (Momordica cochinchinensis Spreng.). On a laboratory scale, the effect of different operating parameters such as trans-membrane pressures (TMP), temperature and membrane pore sizes on permeate flux was determined in order to optimize process conditions that would ensure acceptable flux with adequate juice quality. The quality of the samples coming from the ultrafiltration (UF) process was evaluated in terms of: total soluble solids (TSS), suspended solids (SS), and vitamin C. For example, the purification process of cashew apple juice by cross-flow filtration was optimized at 0.5 µm membrane pore size, 2.5 bars TMP, and 60 min filtration time. Besides, this technique was applied to enhance carotenoids concentration from gac oil. Optimum conditions for a high permeate flux and a good carotenoids retention are 5 nm, 2 bars, and 40 • C of membrane pore size, TMP, and temperature, respectively. Carotenoids were concentrated higher than that in feeding oil.

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“…Pretreatment with alkali prior to membrane filtration resulted in a very high reduction (ca. 90%) of FFA in the processed oils [3,4]. These approaches, however, lead to high refining loss when applied to high-FFA oils.…”

Section: Introductionmentioning

confidence: 99%

“…Clay minerals having these properties are able to adsorb particular amount of trace metals, to reduce the components giving color and chlorophyll, to remove soap and phosphates and to have the effect of reducing FFA to a certain extent [12]. Sepiolite, represented by Si 12 Mg 8 O 30 (OH) 4 (H 2 O) 4 8H 2 O which belongs to the group of silicate, is widely used to remove undesired components from household and industrial wastewaters and in various industrial manufacturing processes, it has not been previously tested for the purification of edible oils [13]. The highly desirable tocopherols were reduced during soybean oil refining, and this removal reduces oxidative stability and nutritional value of the refined oil when compared with the crude oil [14].…”

Section: Introductionmentioning

confidence: 99%