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oily-wastewater
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Oily wastewater treatment using membrane bioreactor
, Article International Journal of Global Warming ; Vol. 6, issue. 2-3 , 2014 , pp. 295-302 ; ISSN: 17582083 ; Alemzadeh, I ; Vossoughi, M ; Sharif University of Technology
Abstract
A novel implementation of a membrane bioreactor (MBR) has been studied in this paper. It is utilised as combination of rotating biological contractor (RBC) and an external membrane for oily wastewater treatment. The performance of MBR was compared with the standalone RBC. The RBC used in this investigation is the same one combined with the membrane to form the MBR. Wastewater biodegradability has been evaluated by two factors: chemical oxygen demand (COD) and total petroleum hydrocarbon (TPH). They are both compared together for different hydraulic retention times (HRTs) and petroleum pollution concentrations in RBC and MBR. The ratio of TPH to COD of molasses has been varied between 0.2 to...
Electrocoagulation for COD and diesel removal from oily wastewater
, Article International Journal of Environmental Science and Technology ; Volume 13, Issue 1 , 2016 , Pages 231-242 ; 17351472 (ISSN) ; Azadi Aghdam, M ; Kariminia, H. R ; Sharif University of Technology
Center for Environmental and Energy Research and Studies
Abstract
This study investigated the diesel and COD removal from oily wastewater by electrocoagulation. Experiments were conducted in a 2-l reactor using aluminum and iron electrodes. Effects of different parameters including pH (3–11), time (10–60 min), voltage (4.5–10.5 V), supporting electrolyte (NaCl concentration), electrode material and initial diesel concentration (3500–11,000 mg/L) were studied in order to evaluate the efficiency of electrocoagulation. Furthermore, the consumption of energy and the amount of sludge produced by this method were evaluated. The highest removal efficiency (COD removal of 99.1 ± 0.2 % and diesel removal of 98.8 ± 0.2 %) was observed under the following conditions:...
Experimental investigation, modeling and optimization of membrane separation using artificial neural network and multi-objective optimization using genetic algorithm
, Article Chemical Engineering Research and Design ; Volume 91, Issue 5 , 2013 , Pages 883-903 ; 02638762 (ISSN) ; Shoushtari, N. A ; Mirza, B ; Salahi, A ; Sharif University of Technology
2013
Abstract
In this work, treatment of oily wastewaters with commercial polyacrylonitrile (PAN) ultrafiltration (UF) membranes was investigated. In order to do these experiments, the outlet wastewater of the API (American Petroleum Institute) unit of Tehran refinery, is used as the feed. The purpose of this paper was to predict the permeation flux and fouling resistance, by applying artificial neural networks (ANNs), and then to optimize the operating conditions in separation of oil from industrial oily wastewaters, including trans-membrane pressure (TMP), cross-flow velocity (CFV), feed temperature and pH, so that a maximum permeation flux accompanied by a minimum fouling resistance, was acquired by...
Experimental Study the Treatment of Oily Wastewater by Thermophilic External Membrane Bioreactor(MBR)
, M.Sc. Thesis Sharif University of Technology ; Kariminia, Hamidreza (Supervisor) ; Vosoughi, Manouchehr (Supervisor) ; Hesampour, Mehrdad (Co-Advisor)
Abstract
The membrane bioreactor (MBR) as an alternative method for simultaneous biodegradation and separation of oily water has received more attention, recently. Normally the MBR works at ambient temperature; therefore, the yield of biodegradation recalcitrant components is low. Increasing temperature improves the efficiency of degradation and reduces the amount of produced sludge. In this study the performance of an aerobic thermophilic and mesophilic membrane bioreactor (MBR) for treating oily wastewater has been investigated. In batch conditions (without applying the membrane), a comparison between COD removal in mesophilic and thermophilic conditions was done. In thermophilic conditions COD and...
Experimental Study of Oily Wastewater Treatment by Hybrid Baffled Bioreactor
, M.Sc. Thesis Sharif University of Technology ; Alemzadeh, Iran (Supervisor) ; Vosoughi, Manochehr (Supervisor)
Abstract
Oil refineries, petrochemical factories and oil platforms produce a large amount of oily wastewater every day. If these wastewaters are released in environment, it can damage soil and water seriously. Although, Biological treatment of oily wastewaters is a well-established method for remediation of these wastes, efficiency of conventional systems such as Activated Sludge, aren’t very high. Also these systems have many problems such as instability during hydraulics shocks and bulking phenomena. the hybrid bioreactor system are designed to increase the efficiency of treatment by allowing greater organic loads, increasing microbial concentration by using attached and suspended bacteria, and...
Determination of the Optimal Conditions for Treatment of Lubricating Oils Wastewater in a Continuous Electrocoagulation Reactor
, M.Sc. Thesis Sharif University of Technology ; Fotovat, Farzam (Supervisor)
Abstract
Electrocoagulation (EC) is an effective process in the treatment of oily wastewater, however, only a few studies have explored the parameters affecting the efficient design of the reactors employed in this process. In this study, a statistical investigation on the factors affecting the design of a continuous electrocoagulation reactor was performed by running the tests designed based on the design of experiments (DOE) principles. The explored design variables were current density (30-80 A/m2), reactor residence time (10-30 min), and the ratio of anode surface to the reactor volume (15-45 m2/m3), which were optimized by the response surface method (RSM) to maximize the amount of oil removal...