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Articles by A.R. Mesdaghinia
Total Records ( 3 ) for A.R. Mesdaghinia
  Amir Hossein Mahvi , A.R. Mesdaghinia and Farham Karakani
  The purpose of this study was to determine whether continuous flow SBR could provide efficient pollutant removal in domestic wastewater. The experiment was carried out using pilot scale at Tehran University of Medical Sciences and in wastewater treatment plant. The results showed that 97.7% of BOD removal, 94.9% COD removal, 85.4% TKN removal, 71.4 % TN removal, 55.9% TP removal and 99% TSS removal could be achieved by the system.
  G.H. Moosavi , K. Naddafi , A.R. Mesdaghinia and R. Nabizadeh
  The aim of present study was to design and construct an Up-flow Anaerobic/Aerobic Fixed Bed (UA/AFB) combined reactor in which an anaerobic and aerobic zones could run in a single reactor to study simultaneously carbon and nutrient removal. The UA/AFB developed reactor was made from Plexiglas plate consisting of two main lower anaerobic and upper aerobic parts. A synthetic wastewater was prepared in concentrations which were close to those found in municipal wastewaters. After developing the biofilm on the media, reactor was operated at 5 different HRTs ranging from 5 to 24 h. Samples collected at any HRTs from influent and sampling ports in steady state condition were analyzed according to standard methods for COD, NH3 , NO-3, PO4-3, alkalinity and pH. The obtained results showed that the HRT of 7 h was suitable for simultaneous removal of COD, nitrification and denitrification. In this HRT efficiencies are 95.4, 94 and 94.5% for COD removal, nitrification and denitrification, respectively. The reactor did not show good performance in phosphorus removal.
  M.B. Miranzadeh , M. Heidari , A.R. Mesdaghinia and M. Younesian
  The objective of the study is surveying microbial quality of drinking water in Kashan rural areas and determining the rural population that using safe water in terms of microbial quality in second-half of 2008. In this cross-sectional study, microbial quality of water in all rural areas was determined in 3 stages based on 3 parameters as Total Coliforms, Fecal Coliforms and Heterotrophic Plate Count (HPC). The results of this study illustrates that 100.0, 47.71 and 92.99% population in under coverage and non under coverage areas of Kashan Rural Water and Wastewater Company (KRWWC) and all Kashan rural areas, respectively using safe water in terms of Fecal Coliforms and 98.4, 21.2 and 88.00% population in under coverage and non under coverage areas of KRWWC rural areas and all Kashan rural areas, respectively using safe water in terms of Total Coliforms. There is also a meaningful difference in microbial quality between under coverage and non-under coverage rural areas. The results of this study express that the fecal contamination in under coverage rural areas is excellent, but there is a bad condition in non-under coverage areas. Generally, the microbial quality in all Kashan rural areas is approximately equal to national microbial criteria. Its been also illustrated that the role of KRWWC in supplying safe drinking water in terms of microbial quality for rural population is very important.
 
 
 
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