Separation and purification of fatty acids by membrane technology: a critical review

2020 ◽  
Vol 18 (9) ◽  
Author(s):  
Enmin Lv ◽  
Shaoxuan Ding ◽  
Jie Lu ◽  
Weiming Yi ◽  
Jincheng Ding
Keyword(s):  
Fatty Acids ◽  
Membrane Separation ◽  
Separation Efficiency ◽  
Raw Materials ◽  
Scale Up ◽  
Membrane Technology ◽  
Separation And Purification ◽  
Enhanced Production ◽  
Low Energy Consumption ◽  
High Separation

AbstractFatty acids (FAs) are a very important group of raw materials for chemical industry, and the technology of separating or purifying the FAs from the reaction product mixture has always been the hotspot of research. Membrane processes for separation of FAs are being increasingly reported. Compared with conventional FAs separation methods, membrane separation has the advantages of low energy consumption, system compactness, high separation efficiency, easy scale-up, high available surface area per unit volume and low working temperatures, thereby attracting considerable attention of many researchers. In this regards, this paper critically reviewed the developments of methods for FAs separation and purification, and the future prospects of coupling membrane technology with hydrolysis for enhanced production of FAs.

An innovative approach for separation and purification of natural products using carbon nanotube–alginate gel beads as a novel stationary phase

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 10878-10885 ◽  
Author(s):  
Jingjing Long ◽  
Yuan Wang ◽  
Yanan Xu ◽  
Xu Li
Keyword(s):  
Natural Products ◽  
Liquid Chromatography ◽  
Carbon Nanotube ◽  
Stationary Phase ◽  
Separation Efficiency ◽  
Packing Material ◽  
Separation And Purification ◽  
Preparative Liquid Chromatography ◽  
Gel Beads ◽  
High Separation

A new packing material is studied in preparative or semi-preparative liquid chromatography with high separation efficiency and quality.

Integration of Multiple Side-Draw Distillation and Continuous Crystallization for Refining of High-Purity p- and o-Nitrochlorobenzene

2011 ◽  
Vol 233-235 ◽  
pp. 926-929
Author(s):  
Qun Qun Huang ◽  
Jun Lin ◽  
Zheng Gui Gu
Keyword(s):  
High Purity ◽  
Separation Efficiency ◽  
New Technology ◽  
Low Energy ◽  
Simple Process ◽  
Integrated Technology ◽  
Continuous Crystallization ◽  
Low Energy Consumption ◽  
Traditional Process ◽  
High Separation

Methods of separating mixed isomers of nitrochlorobenzene (NCB) were reviewed and analyzed in this paper, A new integrated technology including multiple side-draw distillation and continuous crystallization was raised for refining of high-purityp-nitrochlorobenzene(p-NCB) ando-nitrochlorobenzene(o-NCB) from the NCB mixture. Eventually, over 99% purity ofp-NCB ando-NCB can be obtained, and the comprehensive yield is higher than 90%. Compared with the traditional process, the new technology has obvious advantages due to its simple process, high separation efficiency, and low energy consumption.

Manipulation of Microparticles Using Acoustic Standing Wave: Recent Trend

2013 ◽  
Vol 433-435 ◽  
pp. 460-463
Author(s):  
Hai Yan Yin ◽  
Chun Cheng Zuo ◽  
Hong Cheng Wang ◽  
Yan Ping Meng
Keyword(s):  
Standing Wave ◽  
Biochemical Analysis ◽  
Recent Trend ◽  
Separation Efficiency ◽  
Industrial Processes ◽  
Acoustic Standing Wave ◽  
Ultrasonic Standing Wave ◽  
Low Energy Consumption ◽  
Future Direction ◽  
High Separation

Ultrasonic standing wave (USW) manipulation of suspension microparticles separation has attracted wide attention due to its non-direct contact, being harmless to the particles, easy to manufacture, low energy consumption and high separation efficiency. USW is widely used in industrial processes, environmental assessment, biochemical analysis, clinical diagnosis and other fields. In this article, particles stress and movement process is analyzed, meanwhile, aggregation and separation of the particles is discussed respectively and the future direction of development is pointed out.

Development of Ultrafiltration Tubular Ceramic Membrane Using in their Composition Granite Residue

2012 ◽  
Vol 727-728 ◽  
pp. 652-656 ◽  
Author(s):  
Rosa do Carmo de Oliveira Lima ◽  
Iliana Oliveira Guimarães ◽  
Hélio Lucena Lira ◽  
Gelmires Araújo Neves ◽  
Carla Dantas da Silva ◽  
...  
Keyword(s):  
High Selectivity ◽  
Ceramic Membrane ◽  
Membrane Separation ◽  
Scale Up ◽  
Low Energy ◽  
Separation Processes ◽  
Processing Step ◽  
Low Energy Consumption ◽  
Traditional Process ◽  
Easy Operation

The membrane separation processes present several advantages in relation to the traditional process, such as high selectivity, easy operation, good results in the effluent treatments, low energy consumption, small number of processing step, can be applied to thermo sensible substances, easy to combine with other process and scale up, great efficiency in the final product (PORTER, 1990; CAMPOS, 2000). The materials employed in the membrane preparation can be metals, ceramic, polymer or composites.

scholarly journals Purification of Dairy Wastewaters by Advanced Oxidation Processes and Membrane Filtration

2017 ◽  
Vol 11 (1) ◽  
pp. 32-38
Author(s):  
Mihály Zakar ◽  
Erika Lakatos ◽  
Gábor Keszthelyi-Szabó ◽  
Zsuzsanna László
Keyword(s):  
Membrane Fouling ◽  
Membrane Filtration ◽  
Membrane Separation ◽  
Separation Efficiency ◽  
Scale Up ◽  
Separation Processes ◽  
Physicochemical Changes ◽  
Current Trends ◽  
Pre Treatment ◽  
Cost Efficient

Membrane separation processes are space and cost-efficient, easy to scale-up operations, which have proved to treat food industrial wastewaters efficiently. Beside the advantages like high separation efficiency without any chemical changes and low energy-intensity, membrane filtration also has drawbacks, like decreased operational efficiency caused by flux decile resulting from fouling and concentration polarization. Combination of oxidation pre-treatment and membrane filtration is a promising method for decreasing fouling due to the physicochemical changes caused by pre-oxidation of the wastewater in structure of colloidal pollutants and in the interactions between the foulants and the membrane material. The aim of this work is to identify the parameters affecting the membrane fouling during treatment of dairy wastewaters, and present the current trends of research in this field.

scholarly journals Properties of Biodiesel Purified by Membrane Technology

2020 ◽  
pp. 21-27
Author(s):  
Yoel Pasae ◽  
Yulius Salla ◽  
Lyse Bulo
Keyword(s):  
Membrane Separation ◽  
Acid Number ◽  
Membrane Technology ◽  
Biodiesel Production ◽  
National Standard ◽  
Separation And Purification ◽  
Ester Content ◽  
Washing Process ◽  
Total Ester ◽  
Methyl Ester Content

Membrane technology is the most effective technology in the process of separation and purification because the separation of components can occur to the molecular level. Therefore the application of membrane technology in the biodiesel production process can provide high-purity biodiesel quality. In this research, the process of separating and refining palm oil biodiesel does not use the washing process, but it uses membrane separation technology. The membrane used is the ceramic ultrafiltration membrane 0.02 µm. The purification process was carried out at temperature 70°C and pressure 12 Psi (0.86 bar), flow rate of 39.53 L/min, circulation time of 3 hours with a feed of 10 L. After purification, an obtained biodiesel has physical properties as follows: Purity level 97.63% mass (total ester content) and 97.02% mass (methyl ester content), kinematic viscosity at 40°C is 5.70 (cSt), density 0.86 (g/cm3), acid number 0.45 (mg KOH/g) and the saponification number 206.45 mg KOH/g. The values ​​of the physicochemical properties have met Indonesian National Standard (SNI).

Technology and Formation Improvement of Consumer Properties of Cold Appetizers from a Silver Carp in the Roll Form

Food Industry ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 14-22
Author(s):  
Olesya Sergeevna ◽  
Adelya Bekesheva
Keyword(s):  
Fatty Acids ◽  
Food Industry ◽  
Raw Materials ◽  
Silver Carp ◽  
Essential Amino Acids ◽  
Development Stage ◽  
Roll Forming ◽  
Fish Gelatin ◽  
Organoleptic Characteristics ◽  
Food Value

At the present development stage of fish culinary production special significance has range expanding and technology improving for the following purposes: the available fish resources use; the organoleptic characteristics improvement and the nutritional value and competitiveness increase of products manufactured at the enterprises of the food industry. This study concerns the technology and the consumer properties formation improvement of cold appetizers from silver carp in the form of a roll. Unlike traditional the developed products consist of fillet of a bighead silver carp on a skin and an original stuff from egg, vegetables and mushrooms. The researchers conducted study using conventional and special methods. They recommended to introduce gelatin in a dry powdered at the stage of roll forming form in a recipe of the developed fish rolls. A man tested fish gelatin as anew consistency regulator of the developed products. The traditional and fish gelatin use allows to increase the yield of fish cold appetizers in the form of a roll by 8.0 %. When adding gelatin, there was an improvement in consistency and sensory perception of the product as a whole. The analysis results of biological value showed that the developed dishes, being an important additional source of protein and essential amino acids such as threonine, lysine, valine, may well improve the ration balance. The fatty acids ratio in fish rolls prepared according to new recipes is close to the ideal fat in the ratio of saturated, monounsaturated and polyunsaturated fatty acids (35:45:20) and is determined mainly by the composition of fatty acids in silver carp fat. The developed production will allow to expand the range of the food industry enterprises by cold fish appetizers of high quality and food value from available fish raw materials.

Experimental Studies Concerning the Semipermeable Membrane Separation Efficiency for 134Cs, 137Cs, 57Co, 58Co, 60Co, 54Mn in Liquid Radioactive Waste I. Treatment of secondary waste from POD decontamination procedure

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Mirela Dulama ◽  
Nicoleta Deneanu ◽  
Cristian Dulama ◽  
Margarit Pavelescu
Keyword(s):  
Membrane Separation ◽  
Separation Efficiency ◽  
Liquid Radioactive Waste ◽  
Experimental Studies ◽  
Experimental Tests ◽  
Suspended Solid ◽  
Process Efficiency ◽  
Active Charcoal ◽  
Precipitation Process ◽  
Pre Treatment

The paper presents the experimental tests concerning the treatment by membrane techniques of radioactive aqueous waste. Solutions, which have been treated by using the bench-scale installation, were radioactive simulated secondary wastes from the decontamination process with modified POD. Generally, an increasing of the retention is observed for most of the contaminants in the reverse osmosis experiments with pre-treatment steps. The main reason for taking a chemical treatment approach was to selectively remove soluble contaminants from the waste. In the optimization part of the precipitation step, several precipitation processes were compared. Based on this comparison, mixed [Fe(CN)6]4-/Al3+/Fe2+ was selected as a precipitation process applicable for precipitation of radionuclides and flocculation of suspended solid. Increased efficiencies for cesium radionuclides removal were obtained in natural zeolite adsorption pre-treatment stages and this was due to the fact that volcanic tuff used has a special affinity for this element. Usually, the addition of powdered active charcoal serves as an advanced purifying method used to remove organic compounds and residual radionuclides; thus by analyzing the experimental data (for POD wastes) one can observe a decreasing of about 50% for cobalt isotopes subsequently to the active charcoal adsorption.. The semipermeable membranes were used, which were prepared by the researchers from the Research Center for Macromolecular Materials and Membranes, Bucharest. The process efficiency was monitored by gamma spectrometry.

Separation of Biologically Active Compounds by Membrane Operations

2017 ◽  
Vol 23 (2) ◽  
pp. 218-230 ◽  
Author(s):  
Xiaoying Zhu ◽  
Renbi Bai
Keyword(s):  
Energy Consumption ◽  
Bioactive Compounds ◽  
Membrane Fouling ◽  
Membrane Separation ◽  
Separation Efficiency ◽  
High Energy ◽  
Separation Processes ◽  
Membrane Processes ◽  
Separation Technology ◽  
Pressure Driven

Background: Bioactive compounds from various natural sources have been attracting more and more attention, owing to their broad diversity of functionalities and availabilities. However, many of the bioactive compounds often exist at an extremely low concentration in a mixture so that massive harvesting is needed to obtain sufficient amounts for their practical usage. Thus, effective fractionation or separation technologies are essential for the screening and production of the bioactive compound products. The applicatons of conventional processes such as extraction, distillation and lyophilisation, etc. may be tedious, have high energy consumption or cause denature or degradation of the bioactive compounds. Membrane separation processes operate at ambient temperature, without the need for heating and therefore with less energy consumption. The “cold” separation technology also prevents the possible degradation of the bioactive compounds. The separation process is mainly physical and both fractions (permeate and retentate) of the membrane processes may be recovered. Thus, using membrane separation technology is a promising approach to concentrate and separate bioactive compounds. Methods: A comprehensive survey of membrane operations used for the separation of bioactive compounds is conducted. The available and established membrane separation processes are introduced and reviewed. Results: The most frequently used membrane processes are the pressure driven ones, including microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF). They are applied either individually as a single sieve or in combination as an integrated membrane array to meet the different requirements in the separation of bioactive compounds. Other new membrane processes with multiple functions have also been developed and employed for the separation or fractionation of bioactive compounds. The hybrid electrodialysis (ED)-UF membrane process, for example has been used to provide a solution for the separation of biomolecules with similar molecular weights but different surface electrical properties. In contrast, the affinity membrane technology is shown to have the advantages of increasing the separation efficiency at low operational pressures through selectively adsorbing bioactive compounds during the filtration process. Conclusion: Individual membranes or membrane arrays are effectively used to separate bioactive compounds or achieve multiple fractionation of them with different molecule weights or sizes. Pressure driven membrane processes are highly efficient and widely used. Membrane fouling, especially irreversible organic and biological fouling, is the inevitable problem. Multifunctional membranes and affinity membranes provide the possibility of effectively separating bioactive compounds that are similar in sizes but different in other physical and chemical properties. Surface modification methods are of great potential to increase membrane separation efficiency as well as reduce the problem of membrane fouling. Developing membranes and optimizing the operational parameters specifically for the applications of separation of various bioactive compounds should be taken as an important part of ongoing or future membrane research in this field.

scholarly journals Protein recovery as a resource from waste specifically via membrane technology—from waste to wonder

2021 ◽  
Vol 28 (8) ◽  
pp. 10262-10282
Author(s):  
Kanwal Shahid ◽  
Varsha Srivastava ◽  
Mika Sillanpää
Keyword(s):  
Short Communication ◽  
Membrane Separation ◽  
Animal Feed ◽  
Membrane Technology ◽  
Future Research ◽  
Protein Recovery ◽  
World Population ◽  
Waste Streams ◽  
Novel Technologies ◽  
Efficient Extraction

AbstractEconomic growth and the rapid increase in the world population has led to a greater need for natural resources, which in turn, has put pressure on said resources along with the environment. Water, food, and energy, among other resources, pose a huge challenge. Numerous essential resources, including organic substances and valuable nutrients, can be found in wastewater, and these could be recovered with efficient technologies. Protein recovery from waste streams can provide an alternative resource that could be utilized as animal feed. Membrane separation, adsorption, and microbe-assisted protein recovery have been proposed as technologies that could be used for the aforementioned protein recovery. This present study focuses on the applicability of different technologies for protein recovery from different wastewaters. Membrane technology has been proven to be efficient for the effective concentration of proteins from waste sources. The main emphasis of the present short communication is to explore the possible strategies that could be utilized to recover or restore proteins from different wastewater sources. The presented study emphasizes the applicability of the recovery of proteins from various waste sources using membranes and the combination of the membrane process. Future research should focus on novel technologies that can help in the efficient extraction of these high-value compounds from wastes. Lastly, this short communication will evaluate the possibility of integrating membrane technology. This study will discuss the important proteins present in different industrial waste streams, such as those of potatoes, poultry, dairy, seafood and alfalfa, and the possible state of the art technologies for the recovery of these valuable proteins from the wastewater. Graphical abstract

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