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Influence of an Anaerobic Stage on Membrane Fouling in MBR
, M.Sc. Thesis Sharif University of Technology ; Borghei, Mehdi (Supervisor) ; Musavi, Abbas (Co-Advisor)
Abstract
Clean water is a growing need for humanity all around the Earth. Due to the shortage of clean water resources in most parts of our planet, wastewater treatment and reuse has been of great value in past decades. Much research has been conducted to improve treatment systems. One of the most recent advancements in water and wastewater treatment field is application of membrane bioreactor systems. Despite many advantages of these systems, membrane fouling has been the main drawback since the creation and application of them. The main objective of this research is to investigate the probable fouling reduction and head loss in flat sheet UF membranes due to the application of an anaerobic...
Assessment of desulfurization of natural gas by chemoautotrophic bacteria in an anaerobic baffled reactor (ABR)
, Article Chemical Engineering and Processing: Process Intensification ; Volume 45, Issue 3 , 2006 , Pages 232-237 ; 02552701 (ISSN) ; Vossoughi, M ; Soltanieh, M ; Sharif University of Technology
2006
Abstract
The purpose of this study is to evaluate an anaerobic system (ABR) cultured by chemoautotrophic bacteria for biodesulfurization of natural gas. In this study anaerobic baffled reactor with five compartments and active volume of 10 l was used. For increasing solid retention time, reactor was packed by pumice with 0.5-2 cm diameter which active volume decreased to 9 l. Inoculation was performed by activated sludge from municipal sewage treatment, which was kept in anaerobic condition for 1 year. The synthetic wastewater which contains S2O32- ion was used in start-up and S -2 for running of ABR. Performance of the reactor was evaluated at three equivalent hydraulic retention times (HRT) of 50,...
Study of the MBR System for the Removal of Ethyl Benzene and Styrene from Petrochemical Wastewater and Process Optimization by Reducing Membrane Fouling
, Ph.D. Dissertation Sharif University of Technology ; Shayegan, Jalaloddin (Supervisor)
Abstract
In this thesis was investigated the effect of solid retention time (SRT), Hydraulic retention time (HRT), activated carbon and suspended carrier on styrene and ethylbenzene biological removal and also on membrane fouling. In addition to the typical analysis (COD, MLSS, MLVSS, and SVI), the flocculation ability, sludge particle size distribution (PSD), FTIR analysis, excitation-emission matrix (EEM) fluorescence spectroscopy, soluble microbial product (SMP), extracellular polymeric substance (EPS), microscopic observations, microbial activities, microorganism population, and filamentous bacteria are considered to determine sludge characteristics. This study was done in five sections: in the...
Investigation and Controlling of Sludge Bulking in Wastewater Treatment Plant with Synthetic Wastewater
, M.Sc. Thesis Sharif University of Technology ; Shayegan, Jalaleddin (Supervisor)
Abstract
Biological treatment is an essential part of wastewater treatment. One of the major problems of the biological treatment systems is a solid separation. Filamentous bulking is a type of solid separation problem that settled sludge volume and the turbidity of the effluent will be increase in bulking condition. The presence of excessive Filamentous bacteria causes filamentous bulking. In this thesis, filamentous bulking were studied to understand this phenomena better and tried to control that with the different methods. This research was conducted in laboratory scale Sequencing Batch Reactor (SBR), conventional activated sludge and conventional activated sludge with anaerobic selector with...