The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform
Patricia Arlabosse - One of the best experts on this subject based on the ideXlab platform.
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prediction of oil yield from oil palm mesocarp using thermally assisted Mechanical Dewatering tamd
2020Co-Authors: Hasmiera Hashim, Suzana Yusup, Patricia ArlabosseAbstract:Thermally assisted Mechanical Dewatering (TAMD) is a new technology for the separation of solid/liquid. When applied to “nature-wet” biomass, the TAMD process significantly enhances the separation yield. In the present study, TAMD was used to extract the crude palm oil (CPO) from mesocarp. The CPO yield of 70.77 wt% was achieved at optimum parameters of 73.0 °C, 6.7 bar and 60 min of extraction time. This CPO yield was comparable with previous works on the enzymatic extraction and hot compressed water extraction (HCWE) with CPO yield of 71.0 and 70.50 wt% respectively. Apart from that, this value was higher for about 13.80% compared to commercial CPO extracted using screw press which obtained the oil yield of 61.0 wt%. Based on the literatures, the highest CPO yield was obtained from supercritical CO2 extraction at 77.0 wt% whereas the lowest CPO yield was extracted using subcritical R134a which gave 66.0 wt% of oil yield. Nevertheless, the operational conditions of supercritical CO2 were 300 bar and 80 °C which were higher than that of TAMD. In conclusion, TAMD extraction has a potential to be an alternative method to extract CPO by producing higher oil yield.
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extraction of crude palm oil cpo using thermally assisted Mechanical Dewatering tamd and their characterization during storage
6TH INTERNATIONAL CONFERENCE ON ENVIRONMENT (ICENV2018): Empowering Environment and Sustainable Engineering Nexus Through Green Technology, 2019Co-Authors: Hasmiera Hashim, Suzana Yusup, Patricia ArlabosseAbstract:Thermally assisted Mechanical Dewatering (TAMD) is a new technology to separate solid and liquid. In the present study, TAMD was utilized to extract the crude palm oil (CPO) from the palm mesocarp (Elaeis guineensis). The operating parameters examined were temperature and pressure, ranging from 30 to 105 °C and 3 to 12 bar respectively. The extraction was conducted in batch process for 45 minutes of total extraction time. Design of experiment was created using the Response Surface Methodology based on the central composite design (CCD). The CPO yield, carotene concentration, moisture content and free fatty acids (FFA) content were analysed. The maximum oil yield, 70.68 w/w% was extracted at the optimum operating parameters, 7.75 bar and 73.0°C. TAMD demonstrated a promising potential as a viable alternative method for the CPO extraction with lower pressure and shorter extraction time.
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production of green juice with an intensive thermo Mechanical fractionation process part i effects of processing conditions on the Dewatering kinetics
Chemical Engineering Journal, 2011Co-Authors: Patricia Arlabosse, Arnaud Fernandez, Mario Lanc, S KerfaiAbstract:Abstract The thermally assisted Mechanical Dewatering (TAMD) process is a new intensive solid/liquid separation device. When applied to ‘nature-wet’ biomass, the TAMD process significantly enhances the separation yield. The TAMD process couples in one stage a Mechanical Dewatering at low pressure ( P applied = 300 kPa in the present study) with a moderated heating ( T wall ≤ 90 °C). An increment of pressure can be applied in a second stage to further enhance the dry solid content of the press cake. In the present study, the TAMD process was used to dewater spinach leaves and alfalfa stems and leaves. The influence of cutting, pulping and temperature on the fractionation kinetics and the extraction yield were specifically investigated. Experiments were carried out on a laboratory compression cell, heated through the piston. Results show that, at ambient temperature, pulping is an essential pre-processing unit operation to reach an extraction yield of 55%. Under moderate heating conditions ( T wall = 50 or 70 °C), a thermally assisted Mechanical Dewatering, without any pre-processing stage, can remove 69% of the inherent water from alfalfa, that is to say an increase by 23% of the yield. But, compared with the conventional fractionation process, the duration of the Mechanical fractionation must be at least twice longer. Beyond 70 °C, the temperature does not have any influence on the extraction kinetics. Cutting has a very limited influence with an enhancement of the dry solid content from 2 to 5% at best.
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application of a thermally assisted Mechanical Dewatering process to biomass
Biomass & Bioenergy, 2011Co-Authors: Patricia Arlabosse, A Mahmoud, Arnaud FernandezAbstract:Abstract Thermally assisted Mechanical Dewatering (TAMD) is a new process for energy-efficient liquid/solids separation which enhances conventional-device efficiency. The main idea of this process is to supply a flow of heat in Mechanical Dewatering processes to favour the reduction of the liquid content. This is not a new idea but the proposed combination, especially the chosen operating conditions ( T P T piston = 80 °C), the dry solid content of the press cake can reach 66%, compared to 36% at ambient temperature. A significant regression model, describing changes on final dry solids content with respect to independent variables, was established with determination coefficient, R 2 , greater than 88%. With an energy consumption of less than 150 kWh/m 3 , the use of the TAMD process before a thermal drying process leads to an energy saving of at least 30% on the overall separation chain.
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integration of a thermally assisted Mechanical Dewatering process in a drying facility
2011Co-Authors: Cusso N Grau, M Lanc, Patricia ArlabosseAbstract:Mechanical Dewatering processes can be intensified through heat supply. With the thermally assisted Mechanical Dewatering (TAMD) process investigated in this study, the extraction yield is improved by 23% for alfalfa. After separation, the residual solid fraction must be dried to guarantee a good conservation. The TAMD process has the special feature to operate at low temperature (around 60°C). Pinch analysis is used as a prerequisite to assess the opportunity to recover the energy from the exhaust gases of the dryer to heat the secondary air or to heat the coolant flowing in the jacketed wall of the TAMD process. Results emphasizes that significant energy profits can easily be obtained by recovering the heat load in the exhaust gas of the dryer, leading to an energy saving of 55% on the overall separation chain
Arnaud Fernandez - One of the best experts on this subject based on the ideXlab platform.
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production of green juice with an intensive thermo Mechanical fractionation process part i effects of processing conditions on the Dewatering kinetics
Chemical Engineering Journal, 2011Co-Authors: Patricia Arlabosse, Arnaud Fernandez, Mario Lanc, S KerfaiAbstract:Abstract The thermally assisted Mechanical Dewatering (TAMD) process is a new intensive solid/liquid separation device. When applied to ‘nature-wet’ biomass, the TAMD process significantly enhances the separation yield. The TAMD process couples in one stage a Mechanical Dewatering at low pressure ( P applied = 300 kPa in the present study) with a moderated heating ( T wall ≤ 90 °C). An increment of pressure can be applied in a second stage to further enhance the dry solid content of the press cake. In the present study, the TAMD process was used to dewater spinach leaves and alfalfa stems and leaves. The influence of cutting, pulping and temperature on the fractionation kinetics and the extraction yield were specifically investigated. Experiments were carried out on a laboratory compression cell, heated through the piston. Results show that, at ambient temperature, pulping is an essential pre-processing unit operation to reach an extraction yield of 55%. Under moderate heating conditions ( T wall = 50 or 70 °C), a thermally assisted Mechanical Dewatering, without any pre-processing stage, can remove 69% of the inherent water from alfalfa, that is to say an increase by 23% of the yield. But, compared with the conventional fractionation process, the duration of the Mechanical fractionation must be at least twice longer. Beyond 70 °C, the temperature does not have any influence on the extraction kinetics. Cutting has a very limited influence with an enhancement of the dry solid content from 2 to 5% at best.
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application of a thermally assisted Mechanical Dewatering process to biomass
Biomass & Bioenergy, 2011Co-Authors: Patricia Arlabosse, A Mahmoud, Arnaud FernandezAbstract:Abstract Thermally assisted Mechanical Dewatering (TAMD) is a new process for energy-efficient liquid/solids separation which enhances conventional-device efficiency. The main idea of this process is to supply a flow of heat in Mechanical Dewatering processes to favour the reduction of the liquid content. This is not a new idea but the proposed combination, especially the chosen operating conditions ( T P T piston = 80 °C), the dry solid content of the press cake can reach 66%, compared to 36% at ambient temperature. A significant regression model, describing changes on final dry solids content with respect to independent variables, was established with determination coefficient, R 2 , greater than 88%. With an energy consumption of less than 150 kWh/m 3 , the use of the TAMD process before a thermal drying process leads to an energy saving of at least 30% on the overall separation chain.
A Mahmoud - One of the best experts on this subject based on the ideXlab platform.
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advances in Mechanical Dewatering of wastewater sludge treatment
2013Co-Authors: A Mahmoud, J Vaxelaire, Jeremy Olivie, Andrew Forbes Alexande HoadleyAbstract:Dewatering of wastewater sludge is a difficult process. The difficulty has been attributed mainly to the fact that particles are very fine, colloidal in nature and possess a gel-like structure due to polymeric flocculation. In order to tackle the limitations in wastewater sludge Dewatering, new technologies have been developed in recent years. Some technologies, such as wastewater sludge digestion, wastewater sludge mineralisation or peroxidation, allow to reduce the amount of wastewater sludge to be dewatered, or the dewaterability of the sludge, by changing the biochemical composition. Nevertheless, wastewater sludge remains hard to dewater, and therefore, an improvement in the conventional Dewatering equipments is desirable. Therefore, current research tends to propose potential alternatives to enhance the Dewatering ability of conventional processes, to increase the final dry solids content, and to accelerate the Dewatering process with low energy consumption compared to thermal drying.
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application of a thermally assisted Mechanical Dewatering process to biomass
Biomass & Bioenergy, 2011Co-Authors: Patricia Arlabosse, A Mahmoud, Arnaud FernandezAbstract:Abstract Thermally assisted Mechanical Dewatering (TAMD) is a new process for energy-efficient liquid/solids separation which enhances conventional-device efficiency. The main idea of this process is to supply a flow of heat in Mechanical Dewatering processes to favour the reduction of the liquid content. This is not a new idea but the proposed combination, especially the chosen operating conditions ( T P T piston = 80 °C), the dry solid content of the press cake can reach 66%, compared to 36% at ambient temperature. A significant regression model, describing changes on final dry solids content with respect to independent variables, was established with determination coefficient, R 2 , greater than 88%. With an energy consumption of less than 150 kWh/m 3 , the use of the TAMD process before a thermal drying process leads to an energy saving of at least 30% on the overall separation chain.
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thermally assisted Mechanical Dewatering tamd of suspensions of fine particles analysis of the influence of the operating conditions using the response surface methodology
Chemosphere, 2008Co-Authors: A Mahmoud, Aurora Fernandez, Tomamihai Chituchi, Patricia ArlabosseAbstract:Abstract Thermally assisted Mechanical Dewatering (TAMD) is a new process for energy-efficient liquid/solids separation which enhances conventional-device efficiency. The main idea of this process is to supply a flow of heat in Mechanical Dewatering processes to favour the reduction of the liquid content. This is not a new idea but the proposed combination, especially the chosen operating conditions (temperature R 2 , greater than 80%. Experiments were carried out on a laboratory filtration/compression cell, firstly on different compressible materials: synthetic mineral suspensions such as talc and synthetic organic suspensions such as cellulose, and then on industrial materials, such as bentonite sludge provided by Soletanche Bachy Company. Experiment showed that the extent of TAMD for a given material is particularly dependent on their physical and chemical properties but also on processing parameters.
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analysis of electrical phenomena occurring in thermally assisted Mechanical Dewatering processes tamd a preliminary study
2008Co-Authors: A Mahmoud, Aurora Fernandez, Patricia ArlabosseAbstract:The design, modelling and simulation of solid-liquid separation processes remain a challenging area due to difficulties in quantifying distribution of the phases in the filter cake, and in acquiring reliable experimental data for model development. Usually, overall Mechanical Dewatering parameters, such as filtrate volume, average volume fraction of solids, or cake thicknesses are measured. A more fundamental approach is to determine the internal structure of filter cakes, i.e., the profile of the solid volume fraction, in order to investigate the role of the material behaviour during compression steps. In most cases, profiles of solid volume fraction have been investigated using electrical resistance meters (Shirato & Aragaki, 1972; Chase & Willis, 1991). During the measurements, iron pins are positioned at the wall of the filter cell, disturbing the liquid flow and cake formation. Some investigators studied profiles of solid volume fraction in filtration cakes with X-rays (Bierck et al., 1988; Tiller et al., 1990) or nuclear magnetic resonance (NMR) (Horsfield et al., 1989). In our knowledge, the investigation of the solid distribution in a filter cake by electrical tomography technique has not been reported before. This contribution describes preliminary studies for the application of electrical resistance tomography (ERT) for the determination of local volume fractions of solids in a filter cake during the thermally assisted Mechanical Dewatering process (TAMD) (Fernandez et al., 2005). ERT is a non intrusive and non-destructive technique, which does not influence cake. Moreover, electrical resistance tomography (ERT) belongs to real-time, low-cost, easy to implement and fast techniques which exploit differences in the electrical properties of solids and liquids. Electrical resistance tomography basically consists in reconstruction of the conductivity distribution from electrical data which characterize the electrical response of a medium. The electrical current flow in a saturated packed bed submitted to an electrical field is depending on the solid and liquid phases, namely the dispersed and the continuous phases, which have different properties. Several theories have been proposed for the transport of electrical current in mixtures (Helfferich, 1962). However, most of the theories are based on the assumptions of either a regular lattice-type arrangement or a completely random distribution of the components that are not well adapted for filtration cakes. Electrical conductivity of saturated packed bed varies with the mobility and affinity of ions with
D Mihoubi - One of the best experts on this subject based on the ideXlab platform.
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Mechanical and thermal Dewatering of residual sludge
Desalination, 2004Co-Authors: D MihoubiAbstract:Abstract The management of residual sludge is an important subject. New environmental laws require the elimination of this waste by only two ways: incineration and agricultural use. In order to reach this goal, Mechanical Dewatering can be used as a first step due to its low energy cost. However, the final moisture content reached through this method is not generally sufficient and drying becomes obligatory. In this work we studied the first step: Mechanical Dewatering. Some experiments were carried out on a laboratory filtration-compression cell and the use of the Ruth relationship approach was tested in order to characterise slurry in filtration. We also studied the second step: thermal Dewatering. From laboratory convective drying experiments, a macroscopic approach in terms of kinetics curve and drying potential was developed. This criterion, which groups a set of external conditions into a unique parameter (temperature, relative humidity, air velocity), allows for easy classification of different operating strategies.
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Mechanical Dewatering of suspension
Desalination, 2003Co-Authors: D Mihoubi, J Vaxelaire, F Zagrouba, A EllagiAbstract:Abstract Most of plants producing or treating solid-liquid mixtures generate a large amount of residual sludge. Many mineral types of slurry occur in a large range of industrial wastes, including those from mining, ceramics, paper and health care industries. Nowadays, according to new environmental regulations, a reduction of these waste volumes is required. Owing to their relatively low energy cost, filtration processes are often preferred to thermal drying devices to achieve this volume reduction. Because of the difficulty of the theology behaviour of the residual sludge and its stability, we chose to use a synthetic suspension approach to the residual sludge. In this work, mineral sludge (kaolin) was considered. Some experiments were carried out on laboratory filtration-compression cells; the use of the Ruth relationship and the approach of Shirato and co-workers were tested to characterise this slurry in filtration and compression, respectively.
J Vaxelaire - One of the best experts on this subject based on the ideXlab platform.
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advances in Mechanical Dewatering of wastewater sludge treatment
2013Co-Authors: A Mahmoud, J Vaxelaire, Jeremy Olivie, Andrew Forbes Alexande HoadleyAbstract:Dewatering of wastewater sludge is a difficult process. The difficulty has been attributed mainly to the fact that particles are very fine, colloidal in nature and possess a gel-like structure due to polymeric flocculation. In order to tackle the limitations in wastewater sludge Dewatering, new technologies have been developed in recent years. Some technologies, such as wastewater sludge digestion, wastewater sludge mineralisation or peroxidation, allow to reduce the amount of wastewater sludge to be dewatered, or the dewaterability of the sludge, by changing the biochemical composition. Nevertheless, wastewater sludge remains hard to dewater, and therefore, an improvement in the conventional Dewatering equipments is desirable. Therefore, current research tends to propose potential alternatives to enhance the Dewatering ability of conventional processes, to increase the final dry solids content, and to accelerate the Dewatering process with low energy consumption compared to thermal drying.
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Mechanical Dewatering of suspension
Desalination, 2003Co-Authors: D Mihoubi, J Vaxelaire, F Zagrouba, A EllagiAbstract:Abstract Most of plants producing or treating solid-liquid mixtures generate a large amount of residual sludge. Many mineral types of slurry occur in a large range of industrial wastes, including those from mining, ceramics, paper and health care industries. Nowadays, according to new environmental regulations, a reduction of these waste volumes is required. Owing to their relatively low energy cost, filtration processes are often preferred to thermal drying devices to achieve this volume reduction. Because of the difficulty of the theology behaviour of the residual sludge and its stability, we chose to use a synthetic suspension approach to the residual sludge. In this work, mineral sludge (kaolin) was considered. Some experiments were carried out on laboratory filtration-compression cells; the use of the Ruth relationship and the approach of Shirato and co-workers were tested to characterise this slurry in filtration and compression, respectively.
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Mechanical Dewatering and thermal drying of residual sludge
Environmental Technology, 1999Co-Authors: J Vaxelaire, Jean Marc Ongiovanni, Jean Rodolphe PuiggaliAbstract:The optimal management of a residual sludge Dewatering unit using Mechanical dehydration and thermal drying needs a good evaluation of the interactions between those two processes. In particular it is necessary to appreciate the dependence between the Mechanical step and the drying behaviour. This influence is estimated by the comparison of drying rate curves fitted on cakes obtained with different filtration-compression running conditions (various applied pressures, compression time, conditioning). Laboratory experiments were carried out on several residual sludges (organic, mineral, biological). The results showed that the drying step was not significantly influenced by the compressed cake quality (structure more or less squeezed). This result is of real industrial interest; it shows that in many cases it is desirable to eliminate the maximum amount of water by the Mechanical method as this is energetically cheaper.