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Articles 1 - 10 of 10
Full-Text Articles in Science and Technology Studies
Competitive Adsorption Of Metals On Cabbage Waste From Multi-Metal Solutions, M Hossain, H Ngo, W Guo, L Nghiem, F Hai, S Vigneswaran, Thanh Vinh Nguyen
Competitive Adsorption Of Metals On Cabbage Waste From Multi-Metal Solutions, M Hossain, H Ngo, W Guo, L Nghiem, F Hai, S Vigneswaran, Thanh Vinh Nguyen
Faisal I Hai
This study assessed the adsorption capacity of the agro-waste ‘cabbage’ as a biosorbent in single, binary, ternary and quaternary sorption systems with Cu(II), Pb(II), Zn(II) and Cd(II) ions. Dried and ground powder of cabbage waste (CW) was used for the sorption of metals ions. Carboxylic, hydroxyl, and amine groups in cabbage waste were found to be the key functional groups for metal sorption. The adsorption isotherms obtained could be well fitted to both the mono- and multi-metal models. In the competitive adsorption systems, cabbage waste adsorbed larger amount of Pb(II) than the other three metals. However, the presence of the …
The Effect Of Activated Carbon Addition On Membrane Bioreactor Processes For Wastewater Treatment And Reclamation - A Critical Review, George Skouteris, Devendra Saroj, Paraschos Melidis, Faisal Hai, Sabeha Ouki
The Effect Of Activated Carbon Addition On Membrane Bioreactor Processes For Wastewater Treatment And Reclamation - A Critical Review, George Skouteris, Devendra Saroj, Paraschos Melidis, Faisal Hai, Sabeha Ouki
Faisal I Hai
This review concentrates on the effect of activated carbon (AC) addition to membrane bioreactors (MBRs) treating wastewaters. Use of AC-assisted MBRs combines adsorption, biodegradation and membrane filtration. This can lead to advanced removal of recalcitrant pollutants and mitigation of membrane fouling. The relative contribution of adsorption and biodegradation to overall removal achieved by an AC-assisted MBR process can vary, and "biological AC" may not fully develop due to competition of target pollutants with bulk organics in wastewater. Thus periodic replenishment of spent AC is necessary. Sludge retention time (SRT) governs the frequency of spent AC withdrawal and addition of fresh …
Introduction To Membrane Biological Reactors, Faisal Hai, Kazuo Yamamoto, Chung-Hak Lee
Introduction To Membrane Biological Reactors, Faisal Hai, Kazuo Yamamoto, Chung-Hak Lee
Faisal I Hai
This chapter delineats the rationale of combining the membrane and bioreactor technologies and systematically introduces the membrane biological reactors that are the focus of this book. This is followed by a brief account of the history of the various applications of membranes in conjunction with bioreactors and how the initial formats led to the development of the present day commercialized ones. The relative advantages of membrane biological reactors over the conventional biological processes are presented. The current status of the MBR market is described and the drivers propelling its growth along with the constraints are highlighted. The trends in world-wide …
Gas-Diffusion, Extractive, Biocatalytic And Electrochemical Membrane Biological Reactors, Oskar Modin, Faisal Hai, Long Nghiem, Angelo Basile, Kensuke Fukushi
Gas-Diffusion, Extractive, Biocatalytic And Electrochemical Membrane Biological Reactors, Oskar Modin, Faisal Hai, Long Nghiem, Angelo Basile, Kensuke Fukushi
Faisal I Hai
Several emerging technologies for treatment or resource recovery from wastewater are based on the combination of membranes and biochemical conversions. In this chapter, we review gas-diffusion, extractive, biocatalytic, and electrochemical membrane bioreactors (MBRs). Gas diffusion MBRs facilitate efficient delivery of a gaseous oxidant or reductant such as oxygen, hydrogen, or methane to microbial biofilms treating wastewater. Extractive MBRs completely separate the wastewater stream from the microbes and make toxic wastewaters amenable to biological treatment. Biocatalytic MBRs utilize enzymes or immobilized microbial cells for degradation of persistent xenobiotics or for synthesis of fine chemicals. Electrochemical MBRs make it possible to utilize …
Wastewater Reuse: Removal Of Emerging Trace Organic Contaminants (Troc), Faisal Hai, Long Nghiem, Stuart Khan, William Price, Kazuo Yamamoto
Wastewater Reuse: Removal Of Emerging Trace Organic Contaminants (Troc), Faisal Hai, Long Nghiem, Stuart Khan, William Price, Kazuo Yamamoto
Faisal I Hai
This chapter reviews current and new technologies for the removal of emerging TrOC from wastewater for reuse purposes. In particular, it compares the relative performance of Membrane bioreactors (MBR) with other conventional biological processes. It is shown that MBR has many intrinsic advantages over other methods leading to superior performance. Fundamental to this is the presence of a membrane barrier which provides a range of other adsorption mechanisms for TrOC. However, in practice there are many factors affecting TrOC removal by MBR, leading to sometimes conflicting reports in the literature from both lab scale studies as well as full scale …
Rock Bolt Corrosion - An Experimental Study, Naj Aziz, P Craig, Jan Nemcik, Faisal Hai
Rock Bolt Corrosion - An Experimental Study, Naj Aziz, P Craig, Jan Nemcik, Faisal Hai
Faisal I Hai
The effect of long term exposure of full size bolts to corrosive environments is presented. A special test rig was used to test four bolts under different loading conditions. Four X-grade identical profile bolts, each 21·7 mm core diameter (23·7 mm full diameter) were subjected to prolonged corrosion testing using acid sulphate water. The pH value of the circulated water varied between 3·4 and 4·3. The corrosion exposure test period lasted 3·5 years. Two bolts were axially loaded to 10 t and 20 t force respectively, the third bolt was subjected to a 360 Nm torsion load and the fourth …
Membrane Biological Reactors: Theory, Modeling, Design, Management And Applications To Wastewater Reuse, Faisal Hai, Kazou Yamamoto, Chung-Hak Lee
Membrane Biological Reactors: Theory, Modeling, Design, Management And Applications To Wastewater Reuse, Faisal Hai, Kazou Yamamoto, Chung-Hak Lee
Faisal I Hai
Membrane Biological Reactors: Theory, Modeling, Design, Management and Applications to Wastewater Reuse comprehensively covers the salient features and emerging issues associated with the MBR technology. The book provides thorough coverage starting from biological aspects and fundamentals of membranes, via modeling and design concepts, to practitioners’ perspective and good application examples. Membrane Biological Reactors focuses on all the relevant emerging issues raised by including the latest research from renowned experts in the field. It is a valuable reference to the academic and professional community and suitable for undergraduate and postgraduate teaching in Environmental Engineering, Chemical Engineering and Biotechnology.
Application Of Membrane Technology For The Development Of Sustainable Biotechnology Processes, Faisal Hai, Oskar Modin
Application Of Membrane Technology For The Development Of Sustainable Biotechnology Processes, Faisal Hai, Oskar Modin
Faisal I Hai
The scope of application of membranes in biotechnology has widened significantly in the recent years. Although many of the membrane options are yet to achieve wide industrial applications, they show tremendous potential for the transformation and synthesis of valueadded products, energy production, therapeutic applications and environmental remediation. This chapter provides an overview of membrane applications in selected established and emerging biotechnology processes. Approaches to overcoming the technology bottlenecks that impede the scale-up of such systems have been discussed in this chapter.
Biocatalytic Membrane Reactors For The Removal Of Recalcitrant And Emerging Pollutants From Wastewater, F Hai, L Nghiem, O Modin
Biocatalytic Membrane Reactors For The Removal Of Recalcitrant And Emerging Pollutants From Wastewater, F Hai, L Nghiem, O Modin
Faisal I Hai
The potential fields of application of biocatalytic membrane reactors have widened considerably in recent years. Although biocatalytic membrane reactors, in general, are yet to achieve broad industrial application, in the not too far future they are expected to play a major role, not only for the production, transformation and valorization of raw materials but also for environmental remediations. This chapter comprehensively reviews the laboratory scale studies which demonstrate the potential of biocatalytic membrane reactors in wastewater treatment applications. Studies reponed in the literature, however, serve as proof of concept only. Issues that need to be addressed in order to achieve …
Anaerobic Mbrs, Weijue Gao, Bao-Qiang Liao, Faisal Hai
Anaerobic Mbrs, Weijue Gao, Bao-Qiang Liao, Faisal Hai
Faisal I Hai
Anaerobic MBRs (AnMBRs) have been shown to be one of the most promising technologies for sustainable wastewater treatment. It offers several advantages over the aerobic MBRs, namely, requirement of no energy for aeration, low sludge production and energy resource. Compared to the conventional anaerobic processes, AnMBRs can maintain higher biomass concentrations, have higher treatment capacity, excellent effluent quality, and smaller footprint. Compared with the conventional anaerobic digestion, they are relatively robust to cope with variations in organic loading and inhibitory conditions due to complete retention of biomass by membranes. The AnMBR technology is now gaining acceptance by a wide range …