The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
A L Ahmad - One of the best experts on this subject based on the ideXlab platform.
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Residual Oil and suspended solid removal using natural adsorbents chitosan bentonite and activated carbon a comparative study
Chemical Engineering Journal, 2005Co-Authors: A L Ahmad, S Sumathi, B H HameedAbstract:Palm Oil mill effluent (POME), which contains about 4000 mg/l of Residual Oil, has been chosen to remove its Residual Oil using three types of adsorbents. Jar-test method has been used to identify the best adsorbent to remove the Residual Oil from POME. Chitosan was compared to activated carbon and bentonite as a potential Residual Oil remover. Chitosan showed the best removal compared to the other adsorbents for all the parameters studied. Chitosan could successfully remove 99% of Residual Oil and minimize the suspended solid content to a value of 25 mg/l from POME at a dosage of 0.5 g and employing a mixing time of 30 min, a mixing rate of 100 rpm, sedimentation for 30 min and a pH value of ranging from 4.0 to 5.0. For activated carbon and bentonite, the optimum dosages were 8.0 g and 10.0 g/l, respectively, 30 min of mixing time at 150 rpm, 80 and 60 min of settling time, respectively, and pH of 4.0–5.0 to obtain the same percentage of removal as performed by chitosan. Activated carbon and bentonite can only reduce the suspended solid values up to 35 and 70 mg/l, respectively, at the optimized conditions.
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adsorption of Residual Oil from palm Oil mill effluent using rubber powder
Brazilian Journal of Chemical Engineering, 2005Co-Authors: A L Ahmad, Norliza Ibrahim, Subhash Bhatia, S SumathiAbstract:Abstract - A synthetic rubber powder was used to adsorb the Residual Oil in palm Oil mill effluent (POME). POME is the wastewater produced by thepalm Oil industry. It is a colloidal suspension which is95 -96% water, 0.6-0.7% Oil and -5% total solids including 4 -4% suspended solids originat2 ing in the mixing of sterilizer condensate, separator sludge and hydrocyclone wastewater. POME contains 4,000 mg dm -3 of Oil and grease, which is relatively high compared to the limitof only 50 mg dm -3 set by the Malaysian Department of Environment. A bench-scale study of the adsorption of Residual Oil in POME using synthetic rubber powderwas conducted using a jar test apparatus. The adsorption process was studied by varying parameters affecting the process. The parameters were adsorbent dosage, mixing speed, mixing time and pH. The optimum values of the parameters were obtained. It was found that almost 88% removal of Residual Oil was obtained withan adsorbent dosag e of 30 mg dm
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removal of suspended solids and Residual Oil from palm Oil mill effluent
Journal of Chemical Technology & Biotechnology, 2003Co-Authors: A L Ahmad, Suzylawati Ismail, Norliza Ibrahim, Subhash BhatiaAbstract:Palm Oil mill effluent (POME) was pretreated to remove suspended solids and Residual Oil. The processes used were flocculation, solvent extraction, adsorption and membrane separation. Flocculation was used to remove suspended solids, and solvent extraction and adsorption processes were used to remove Residual Oil. Membrane separation was subsequently applied to remove any Residual suspended solids and Oil remaining after the pretreatments. The solvent extraction and adsorption processes were operated on a batch basis whereas membrane separation was performed in continuous mode. The treatment efficiency of the processes was measured as percentage removal of suspended solids and Oil respectively. The optimum values of the process parameters obtained in the flocculation process were an alum dosage of 4000 mg dm−3, mixing speed of 150 rpm for 1 h and sedimentation time of 270 min, resulting in 93% suspended solids removal. In the solvent extraction process, a 95% reduction in Residual Oil was obtained using n-hexane as a solvent with 20 min of mixing at 200 rpm. The ratio of solvent to POME was 6:10 and carried out at pH 9. In the batch adsorption process, an 88% reduction in Residual Oil was obtained at a mixing speed of 100 rpm for 1 h, pH 9 and an adsorbent dosage of 300 g dm−3. In membrane separation processes, GH and CE(GH) membranes gave 63% and 49% reductions in suspended solids and Residual Oil respectively at pH 9 and pressure of 1000 kPa. Copyright © 2003 Society of Chemical Industry
Subhash Bhatia - One of the best experts on this subject based on the ideXlab platform.
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adsorption of Residual Oil from palm Oil mill effluent using rubber powder
Brazilian Journal of Chemical Engineering, 2005Co-Authors: A L Ahmad, Norliza Ibrahim, Subhash Bhatia, S SumathiAbstract:Abstract - A synthetic rubber powder was used to adsorb the Residual Oil in palm Oil mill effluent (POME). POME is the wastewater produced by thepalm Oil industry. It is a colloidal suspension which is95 -96% water, 0.6-0.7% Oil and -5% total solids including 4 -4% suspended solids originat2 ing in the mixing of sterilizer condensate, separator sludge and hydrocyclone wastewater. POME contains 4,000 mg dm -3 of Oil and grease, which is relatively high compared to the limitof only 50 mg dm -3 set by the Malaysian Department of Environment. A bench-scale study of the adsorption of Residual Oil in POME using synthetic rubber powderwas conducted using a jar test apparatus. The adsorption process was studied by varying parameters affecting the process. The parameters were adsorbent dosage, mixing speed, mixing time and pH. The optimum values of the parameters were obtained. It was found that almost 88% removal of Residual Oil was obtained withan adsorbent dosag e of 30 mg dm
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removal of suspended solids and Residual Oil from palm Oil mill effluent
Journal of Chemical Technology & Biotechnology, 2003Co-Authors: A L Ahmad, Suzylawati Ismail, Norliza Ibrahim, Subhash BhatiaAbstract:Palm Oil mill effluent (POME) was pretreated to remove suspended solids and Residual Oil. The processes used were flocculation, solvent extraction, adsorption and membrane separation. Flocculation was used to remove suspended solids, and solvent extraction and adsorption processes were used to remove Residual Oil. Membrane separation was subsequently applied to remove any Residual suspended solids and Oil remaining after the pretreatments. The solvent extraction and adsorption processes were operated on a batch basis whereas membrane separation was performed in continuous mode. The treatment efficiency of the processes was measured as percentage removal of suspended solids and Oil respectively. The optimum values of the process parameters obtained in the flocculation process were an alum dosage of 4000 mg dm−3, mixing speed of 150 rpm for 1 h and sedimentation time of 270 min, resulting in 93% suspended solids removal. In the solvent extraction process, a 95% reduction in Residual Oil was obtained using n-hexane as a solvent with 20 min of mixing at 200 rpm. The ratio of solvent to POME was 6:10 and carried out at pH 9. In the batch adsorption process, an 88% reduction in Residual Oil was obtained at a mixing speed of 100 rpm for 1 h, pH 9 and an adsorbent dosage of 300 g dm−3. In membrane separation processes, GH and CE(GH) membranes gave 63% and 49% reductions in suspended solids and Residual Oil respectively at pH 9 and pressure of 1000 kPa. Copyright © 2003 Society of Chemical Industry
Berna Hascakir - One of the best experts on this subject based on the ideXlab platform.
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the Residual Oil saturation determination for steam assisted gravity drainage sagd and solvent sagd
Fuel, 2016Co-Authors: Cesar Ovalles, Janie Vien, Estrella Rogel, Berna HascakirAbstract:Abstract The Residual Oil saturation determination is critical for the performance evaluation of any Enhance Oil Recovery (EOR) methods. The existing Residual Oil saturation determination methods are mainly based on solvent extraction. However, because the quality of the extracted Residual Oil and the remaining spent rock samples have not been examined before, this study investigates the accuracy of two commonly used solvent extraction methods for the Residual Oil saturation determination extracted from the spent rock samples of Steam Assisted Gravity Drainage (SAGD) and Solvent-SAGD. The results of the commonly used solvent extraction methods were compared with a new thermal method. It has been found that the thermal method provides more accurate results than solvent extraction method because the reservoir clays interact with Residual Oil and solvent methods cannot successfully separate the Residual Oil from reservoir rock. Therefore, a significant amount of clay is detected in the extracted Residual Oil through solvent extraction. Moreover, this study reveals that among the saturates, aromatics, resins, and asphaltenes fractions of Residual Oil, the aromatics fraction is responsible for the clay–asphaltene interaction and the resins content reduces this interaction. Because the solvents used to separate Residual Oil from rock samples are in general strong aromatic solvents, the existing solvent extraction methods fail to determine the Residual Oil saturation amount accurately.
Cesar Ovalles - One of the best experts on this subject based on the ideXlab platform.
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the Residual Oil saturation determination for steam assisted gravity drainage sagd and solvent sagd
Fuel, 2016Co-Authors: Cesar Ovalles, Janie Vien, Estrella Rogel, Berna HascakirAbstract:Abstract The Residual Oil saturation determination is critical for the performance evaluation of any Enhance Oil Recovery (EOR) methods. The existing Residual Oil saturation determination methods are mainly based on solvent extraction. However, because the quality of the extracted Residual Oil and the remaining spent rock samples have not been examined before, this study investigates the accuracy of two commonly used solvent extraction methods for the Residual Oil saturation determination extracted from the spent rock samples of Steam Assisted Gravity Drainage (SAGD) and Solvent-SAGD. The results of the commonly used solvent extraction methods were compared with a new thermal method. It has been found that the thermal method provides more accurate results than solvent extraction method because the reservoir clays interact with Residual Oil and solvent methods cannot successfully separate the Residual Oil from reservoir rock. Therefore, a significant amount of clay is detected in the extracted Residual Oil through solvent extraction. Moreover, this study reveals that among the saturates, aromatics, resins, and asphaltenes fractions of Residual Oil, the aromatics fraction is responsible for the clay–asphaltene interaction and the resins content reduces this interaction. Because the solvents used to separate Residual Oil from rock samples are in general strong aromatic solvents, the existing solvent extraction methods fail to determine the Residual Oil saturation amount accurately.
Suzylawati Ismail - One of the best experts on this subject based on the ideXlab platform.
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removal of suspended solids and Residual Oil from palm Oil mill effluent
Journal of Chemical Technology & Biotechnology, 2003Co-Authors: A L Ahmad, Suzylawati Ismail, Norliza Ibrahim, Subhash BhatiaAbstract:Palm Oil mill effluent (POME) was pretreated to remove suspended solids and Residual Oil. The processes used were flocculation, solvent extraction, adsorption and membrane separation. Flocculation was used to remove suspended solids, and solvent extraction and adsorption processes were used to remove Residual Oil. Membrane separation was subsequently applied to remove any Residual suspended solids and Oil remaining after the pretreatments. The solvent extraction and adsorption processes were operated on a batch basis whereas membrane separation was performed in continuous mode. The treatment efficiency of the processes was measured as percentage removal of suspended solids and Oil respectively. The optimum values of the process parameters obtained in the flocculation process were an alum dosage of 4000 mg dm−3, mixing speed of 150 rpm for 1 h and sedimentation time of 270 min, resulting in 93% suspended solids removal. In the solvent extraction process, a 95% reduction in Residual Oil was obtained using n-hexane as a solvent with 20 min of mixing at 200 rpm. The ratio of solvent to POME was 6:10 and carried out at pH 9. In the batch adsorption process, an 88% reduction in Residual Oil was obtained at a mixing speed of 100 rpm for 1 h, pH 9 and an adsorbent dosage of 300 g dm−3. In membrane separation processes, GH and CE(GH) membranes gave 63% and 49% reductions in suspended solids and Residual Oil respectively at pH 9 and pressure of 1000 kPa. Copyright © 2003 Society of Chemical Industry
