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Monitoring of Chemical Elements and Cane Juice Impurities and the Effect on Raw Sugar Waste Agro- Industry Hakim Farbi
, M.Sc. Thesis Sharif University of Technology ; Matloubi Moghaddam, Firouz (Supervisor) ; Alamolhoda, Ali Asghar (Co-Advisor)
Abstract
Cane sugar impurities cause reduse production sugar in cane sugar industry.These impurities include polysaccharide for example starch, dextran and inorganic ash constituent such as potassium, sodium calcium magnesium and silica .The amount of impurities in the cane sugar depend on many factors including variety , grooving conditions and regional climate. Removal of impurities from cane sugar juice by clarification is an essential part of process of raw sugar manufacture. This process is based on the addition of lime, phosphates and polyelectrolyte. In this study effect of the amount of lime, phosphates and poly electrolyte on removal of various impurities has been investigated.In addition...
Turbulence and additive effects on ignition delay in supersonic combustion
, Article Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering ; Volume 227, Issue 1 , 2013 , Pages 93-99 ; 09544100 (ISSN) ; Sharif University of Technology
2013
Abstract
Numerical study of two-dimensional supersonic hydrogen-air mixing layer is performed to investigate the effects of turbulence and chemical additive on ignition distance. Chemical reaction is treated using detail kinetics. Advection upstream splitting method is used to calculate the fluxes, and one-equation turbulence model is chosen here to simulate the considered problem. Hydrogen peroxide is used as an additive and the results show that inflow turbulence and chemical additive may drastically decrease the ignition delay in supersonic combustion
The combination of KMnO4 oxidation and polymeric flocculation for the mitigation of membrane fouling in a membrane bioreactor
, Article Separation and Purification Technology ; Volume 159 , 2016 , Pages 124-134 ; 13835866 (ISSN) ; Moslemi, M ; Mirzaei, S. H ; Sharif University of Technology
Elsevier
Abstract
KMnO4 oxidation combined with polyelectrolyte (K530CF) flocculation was investigated to mitigate membrane fouling in a membrane bioreactor. The optimum dosages of chemical additives in order to enhance the removal of soluble microbial products (SMPs) were determined. This method was able to reduce the concentration of COD in the effluent to 57.1% and 51.1% lower than those in the experiments in the absence of chemical flocculants and in the presence of polyelectrolyte, respectively. NH3-N removal was improved by combining KMnO4 and K530CF. When KMnO4 was used along with polyelectrolyte, the zeta potential was neutralized to a greater extent which resulted in an improvement in the...
A review on impacts of drilling mud disposal on environment and underground water resources in south of Iran
, Article Proceedings of the SPE/IADC Middle East Drilling Technology Conference and Exhibition, 26 October 2009 through 28 October 2009 ; 2009 , Pages 447-454 ; 9781615677450 (ISBN) ; Dashtian, H ; Paiaman Mirzai, A ; Al Anazi, B. D ; Sharif University of Technology
Abstract
In drilling oil wells a system of complex fluids and chemical additives is used. Losses of these fluids in the well during drilling or disposal of them in well site could transfer pollutants to groundwater. In the present study a number of well sites, located in South of Iran, were studied to indicate types and magnitude of various pollutant materials that remain in the environment undestroyed and have considerable impacts on the underground water resources. Hydrocarbons used in Oil Base Muds (OBM) that can't be biodegrade readily in nature found to be the most severe pollutant material caused by disposal of Drilling Mud and Cuttings. Volume of drilling waste for these oil wells evaluated to...