نشریه شریف
پیاپی 50 (آبان 1388)

The study of activated sludge Ryzandamgan Tjzyhknndhy compatible with phenol phenol، which is six months in duration with synthetic wastewater containing phenol in activated sludge systems are compatible، separation and purification، and the performance of each strain exposed to phenol in the presence and absence of substrate auxiliary، best microbial strains are selected. Order kinetic model of cell growth، the best strains exposed to different concentrations of phenol in the containers were shaky and its growth plus the remaining amount of phenol at different times to complete the breakdown of phenol is measured. Then with the help Haldnpanvys {Haldane} Kinetic model and data obtained in modeling environments $ MATLAB، 6. 5 $ to do، and cell growth Kinetic constants equal to $ mu_ {m} = 0. 592، (1 / h) $، $ K_ {s} = 920. 3، (mg / L) $ and $ K_ {I} = 115. 62، (mg / L) $ is estimated. Kinetic model for simulating Tyynshdh refining and bio-magnification scale، industrial design is great.

One of the most important groundwater sources of drinking water in Tehran. Because dehydration years Tehran 50% water is supplied through the same waters، their quality is important. In this research، the location of wells Tehran، considering their appropriate positions near the fuel supply in 86 selected sampling was done. Measuring organic pollutants in groundwater that Tehran was determined concentrations of total organic carbon (TOC) at all sampling wells was exceeded in the range 6. 5 to 12. 5 mg per liter was modified. With hydrocarbon contamination of the samples revealed that most wells tested are free of this contamination. Nitrate levels measured in selected wells and the highest value of about 133 milligrams per liter was calculated. According to the data synchronization between TOC، nitrate، and also review the results of any device that GC_MS hydrocarbon contamination in most samples did not show the presence of sewage source for organic contamination in groundwater was reported Tehran. However، in two samples taken from different regions Yaftabad and Sydkhndan behavior was observed which indicates leakage of gasoline storage tanks Fuel is upstream of the two places. Finally، the solutions in order to remove the pollution control is proposed.

In the present study kinetics of methane oxidation process coupled Ryzvaknshgr in a fixed bed catalyst using Prvskay، including methane and oxygen with food and with different ratios were investigated. Optimized process conditions، temperature $ 750-785 ^ circ C $، methane to oxygen ratio: two in Dubai and feed gas space velocity ml/Min160min $ ^ {-1} $: 100 was obtained. Kinetic models of the overall review process and the optimal parameters with genetic algorithms، were determined. This paper models of the overall process of Kinetic، six models selected by genetic algorithm fitting with the experimental results obtained in vitro system in different conditions of process analysis and optimization parameters were determined. Among these models، the model accurately Santa higher on the test results have been fitted. Marquardt algorithm، as well as Markvart analysis and comparison with genetic algorithms were used to show the results in the algorithm، unlike genetic algorithms، the possibility of being caught in the trap there is a relative minimum.

Minimum pressure Amtzajpzyry $ (MMP) $ key concept in the design and implementation process is the mixing of injected clones harvest method. In this research، $ MMP $ calculations using analytical methods Parakr done، and the results are compared with experimental data. Analytical calculations in the sudden evaporation of a negative for oil and gas reservoir and the injection performed by injecting primary Khtbsthay Khtbst cross are linked gether، are determined. Amtzajpzyry minimum pressure، pressure that its accumulation during one of the primary oil Khtbsthay zero to be injected. In the second method according to the definition of $ MMP $ as the lowest pressure where the surface tension between two phases is zero، this quantity based on the calculation of surface tension between Parakr model is determined. Analytical calculation method using Equations $ PR $ $ MNM $ and are doing. The results of analytical models with experimental methods pen tube، and the results of the model elimination method، surface tension Parakr $ (VIT) $ is compared. Reviews conducted on the effect of injected gas composition indicates that the presence of intermediate components in gas injection can be effective to reduce $ MMP $.

The separation of benzoic acid as a preservative or additive materials intermediate in the chemical industry is required، and often harmful effects due to Industrial Wastewater Treatment refined environmental Despite its low-benzoic acid in industrial wastewater، adsorption by activated carbon method will suffice. In this way the desired effluent from the bed of active carbon tubes like Rngngary (chromatography) pass. Considering the amount of heat absorption is measured with the colorimeter، the heat of adsorption less than the minimum heat of chemical absorption، adsorption، and therefore the physical type is declared. In these experiments، the effects of resin bed depth and severity of volumetric flow rate of feed in order to achieve optimal conditions of adsorption process in laboratory measurements of the investigation was accurate. Finally، optimal conditions، the bed six inches deep with a flow volume of 0. 75 ml per minute and with activated carbon adsorbent in sizes 36-30 mesh sieve and Rngngary tube with internal diameter 9. 5 mm was obtained.

In this study، the numerical solution of linear and nonlinear equations، the flow of oil Ykbdy homogeneous and heterogeneous environments with the Green element method has been investigated. Green element method based on emerging theory of singular integral components of the border، but due to the feature sphere Gssthsazy solving finite element method، a matrix that is scattered and limited it is easier to solve. Resolved in this way to obtain the Green''s function without Borders and the desired differential equation into integral equations and then started making discrete integral equations، equations formed Srhmsazy German and eventually apply these equations with boundary conditions accepts the end. Using this method، after solving examples of linear and nonlinear flow، the results compared with analytical solutions were available.

Pdydhyy adverse impacts of oil pollution with serious and destructive on the environment and human health. Since one of the main sulfur compounds Lvdhknndhhay oil refinery and one of the most important are the objectives in this study a systematic review in order to determine the reaction kinetics of hydrogen desulfurization) HDS diesel oil cut using a commercial catalyst was NHS $ -204 $. Reactive tests in a tiny bed temperature Qtrhyy $ 360-380 ^ degree C $، pressure and velocity space bar 70-55) LHSV (h $ ^ {-1} $ 2-0. 5 done. According to the desulfurization especially derivatives of Tyvfnha Dybnzvtyvfny Bnzvtyvfny and is difficult and comes in deep desulfurization، so here the reaction kinetics (HDS) for the article Dybnzvtyvfn and sulfur can form model was determined. The results indicate that the degree of reaction in the feed gasoline HDS Dybnzvtyvfn is equal to 1. 4. HDS reaction activation energy was determined as the kcal/mol15.