Effect of Oil Concentration in Treatment of Saline Oily Wastewater Using Forward Osmosis Process بررسی اثر غلظت نفت در تصفيه پسابهای نفتی شور بهوسيله فرايند اسمز مستقيم
Journal Title: آب و فاضلاب - Year 2018, Vol 29, Issue 6
Abstract
Abstract Treatment of the produced water, as a major wastewater in oil and gas industry, is concerned with reduction of the wastewater volume or providing water for some applications such as agriculture. Since membrane technologies play an important role in the separation of dissolved and emulsified oil droplets, forward osmosis (FO) was used in this research as a novel process to reduce the volume of such wastewater. A cellulose commercial flat membrane was applied in a FO laboratory system. The results showed that by increasing the concentrations of the most important inorganic solutes in produced water from 0 to 20 g/L, water flux decreased from 11 to 6.6 L/m2.h due to an increase in feed osmotic pressure. In the presence of 1000 and 3000 mg/L oil in deionized feed water, 12 and 15 percent reduction of the water flux was observed, respectively. This was due to the increased viscosity of feed and the precipitation and adsorption of emulsified oil particles on the membrane surface. On the other hand, adding oil to the solution with different salt concentrations, led to a further reduction in the water flux. This was a result of the increase in feed osmotic pressure and changes in the condition of oil-water emulsion in the presence of salts. The salts increased the surface tension of the solution, which caused coagulation of oil droplets and higher fouling in the membrane surface.
پتانسیل حذف استایرن توسط میکروارگانیسم هوازی رودوکوکوس اریتروپولیس PTCC 1767
Potential Removal of Styrene by the Aerobic Microorganism Rhodococcus erythropolis PTCC 1767 Abstract Biodegradation of styrene by an aerobic microorganism (namely, Rhodococcus erythropolis PTCC 1767) as well as the e...
بررسی کارايی فرايند اکسيداسيون پيشرفتهH2O2/ZnO در حذف آنتیبيوتيک سفترياکسون از محيطهای آبی Efficiency of Advanced H2O2/ZnO Oxidation Process in Ceftriaxone Antibiotic Removal from Aqueous Solutions
Efficiency of Advanced H2O2/ZnO Oxidation Process in Ceftriaxone Antibiotic Removal from Aqueous Solutions Abstract A major concern about pharmaceutical pollution is the presence of antibiotics in water resources throu...
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Abstract Due to the importance and widespread applications of oil products as well as their threats to surface water bodies in Iran, it is inevitable to apply suitable simulation models to develop management plans, act...
مقایسه هزینه- اثربخشی سیستمهای لجن فعال با سیستمهای طبیعی تصفیه فاضلاب در استان کرمانشاه
Comparison of the Cost-effectiveness of Activated Sludge Systems with Natural Wastewater Treatment Systems in Kermanshah Province Abstract To determine the economic feasibility of wastewater treatment plants requires me...
Investigation of Porous Structures for Protection of Pipelines against Water Hammer بهکارگيري ساختارهاي متخلخل براي حفاظت خط لوله در مقابل ضربه قوچ
Abstract This study was initiated to investigate the use of a porous structure in some parts of a pipeline to protect it against water hammer pressure wave. This study was inspired by the utilization of porous breakwate...