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Articles by R. Nabizadeh
Total Records ( 4 ) for R. Nabizadeh
  H. Kamani , F. Vaezi , R. Nabizadeh , A.R. Mesdaghinia and M. Alimohammadi
  UV disinfect ion has gained widespread use for municipal wastewater and more recently, interest in using UV for water reuse applications has increased too. Medium pressure lamp has emerged as a viable alternative and is beginning to gain more popularity than the conventional low-pressure lamps. This study has been performed with the objective of utilizing MP lamp for the disinfection stage of wastewater from a milk industry. The lab-scale UV submerged system used in the experiments was a single-lamp reactor with 3 L volume, which was operated at two contact times. Two MP lamps of 300 and 400 W had been used separately. Results indicated that for disinfection of all the samples with different %T, meeting the goal of 1000 MPN /100 mL or less was always possible. Besides, for 95% of these samples, the MPN of irradiated effluents had reached to less than 240/100 mL. Another conclusion is that by use of 400 W lamp, all the samples are well disinfected to 100 total coli forms or less per 100 mL and so are become ready for most applications of water reuse programs.
  G.R. Moosavi , A.R. Mesdaghinia , K. Naddafi , F. Vaezi and R. Nabizadeh
  Odor control is a severe problem common to most wastewater operations particularly significant at urban treatment plants, gas and oil refineries, paper and pulp industries, etc. The most commonly reported odorous compound in POTW off-gases is hydrogen sulfide (H2S) which has a very low odor threshold. These odorous emissions can cause a nuisance to adjacent populations and contribute significantly to atmospheric pollution. Waste gases have traditionally been treated using physicochemical processes, such as scrubbing, adsorption, condensation and oxidation, however biological treatment of waste gasses has gain support as an effective and economical option in the past few decades. Some studies have been done on biological systems to control of waste air containing H2S, although no review on these systems have been reported in the literature. This study reviews available data regarding the performance of biological systems to treat off-gases containing H2S.
  J. Nouri , R. Nabizadeh , M. Younesian , H.A. Norouzi and S.M. Tehrani
  Environmental and health impact assessment of Hamadan wastewater treatment plants were studied for the treatment of wastewater produced at Hamadan, Bahar and Lalejin Cities, with the population of about one millions. In this study, a new method of EIA applied, using Leopold Matrix 3 dimensions to predict the negative and positive impacts of the project activities on environmental factors. After the data collection, processing and analyzing, Adkins and Burks check list along with new 3-dimensional Leopold Matrix were applied. This 3-dimensional method was a new method which was applied in this study for the first time in Iran. The scaling-ranking checklist was also applied which is a suitable approach for determination of intensity and importance of environmental impacts. The results obtained from this investigation showed that execution of the wastewater treatment plant could have some negative impacts, but may contain some important positive impacts particularly on the improvement of health conditions and environmental quality in the proposed project area. The mitigation measures have also been noticed for the project and in this regard some major management approaches were proposed at the construction and operational phases.
  J. Nouri , M. Jafarinia , K. Naddafi , R. Nabizadeh , A.H. Mahvi and N. Nouri
  Energy recovery in wastewater treatment plant is one of the ways to lowering operation costs. The research was conducted in Tabriz wastewater treatment plant, at the north west of Iran in 2004 which has a design capacity of 1.5 m3s-1 wastewater. The main focus of the research was on methane production potential of domestic wastewater. During this study which lasted 6 month`s energy consumer units of plant were reviewed. Wastewater flow rate (Q), BOD and bCOD of wastewater in three points, plant influent, primary settling effluent and plant effluent, were tested. The potential of methane production were also estimated and converted to electrical energy. The results showed that by optimization of methane production and energy consumption in different units of plant, it is possible to provide 97% of plant electrical energy and all of another form of energy as heat.
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