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Batch degradation of phenol in a spouted bed bioreactor system
Muftah H. El-Naas,Souzan Makhlouf,Sulaiman Al-Zuhair 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.2
Bacterial biotreatment has gained a lot of attention in recent years as an alternative method for the removal of phenol from wastewater. Under aerobic conditions, Pseudomonas putida utilize phenol as a source of carbon and energy. In this work, P. putida was immobilized in Polyvinyl Alcohol (PVA) gel particles and used in a spouted bed bioreactor to remove phenol from wastewater. The effects of initial phenol concentration and air flow rate on the rate of aerobic phenol removal were investigated. The experimental results were used to develop a dynamic model to describe the utilization of phenol for the bacterial growth in spouted bed bioreactor.
Characterization of the removal of Chromium(VI) from groundwater by electrocoagulation
Shaima S. Hamdan,Muftah H. El-Naas 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
A batch electrocoagulation system has been evaluated for the removal of Cr(VI) from brackish groundwater under different operating conditions. The influence of electrode type, applied current density, initial pH, initial chromium concentration, conductivity and temperature were evaluated. The experimental results indicated that chromium removal increased with increasing the applied current density and conductivity. The efficiency of different electrode arrangements (iron, aluminum) was also assessed, and indicated that Fe–Fe electrode pair was the most efficient arrangement and was able to achieve 100% Cr removal at an electrocoagulation time of 5 min, a current density of 7.94 mA/cm2, and pH of 8 at room temperature 25 8C. The generated sludge for the iron electrodes was characterized using EDS, X-ray fluorescence (XRF) and FE-SEM. The analysis confirmed the formation and precipitation of Fe(OH)3 and Cr(OH)3 as solids. Overall, the study affirmed that electrocoagulation is a reliable technique for the purification of groundwater with an estimated energy consumption of 0.6 kWh/m3. 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Copper removal from industrial wastewater: A comprehensive review
Sajeda A. Al-Saydeh,Muftah H. El-Naas,Syed J. Zaidi 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.56 No.-
Copper is one of the most valuable and prevalent metals used in the industry. There are many techniques to treat different types of industrial wastewater that are contaminated with heavy metals such as copper. This article focuses on reviewing the most advanced wastewater treatment techniques, including adsorption, membrane filtration, cementation and electrodialysis. The review examines the differences among the treatment methods in terms of duration and overall efficiencies. The review outlines the current research in the area in terms of weaknesses and strengths, leading to future research prospective and pointing out gabs that need to be addressed in future research.
Sulaiman Al-Zuhair,Khalda Ahmed,Ashir Abdulrazak,Muftah H. El-Naas 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.2
The sequential addition of the enzymes, laccase for lignin degrading, followed by xylanase for hemicelluloses hydrolysis, then cellulase for cellulose hydrolysis, was compared to the synergistic action of using the three enzymes together. It was shown that the reducing sugars yield increased from 5.6%using cellulase only to 45.6% by pretreatment with laccase and xylanase, prior to the enzymatic hydrolysis. A higher conversion of 60% was achieved by using the three enzymes together for the same incubation period. The proposed synergistic enzymes approach is a simpler and less energy intensive alternative compared to the conventional lignocelluloses pretreatment techniques.