Nafiseh Aghababaei
Abstract
Objectives Based on the significant progress made on the field of membrane technology, the application of this technology has rapidly increased. The current study aimed at assessing the physicochemical and microbial quality of the desalinated water provided by the private sector (Esin) in Saveh, Iran. ...
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Objectives Based on the significant progress made on the field of membrane technology, the application of this technology has rapidly increased. The current study aimed at assessing the physicochemical and microbial quality of the desalinated water provided by the private sector (Esin) in Saveh, Iran. The results of the current study were compared with the guidelines of Institute of Standards and Industrial Research of Iran (ISIRI).Methods A finite time service was studied based on a total of 15 samples a day. The period of study was about 7 months from 2014 to 2015. Physical and chemical tests were performed according to the standard methods of water and wastewater. Total coliform bacteria and fecal coliform tests were conducted by multiple tube fermentation method and the total number of heterotrophic bacteria was investigated by the pour plate method.Results Results showed the values of physical parameters as turbidity 0.10 (nephelometric turbidity units) NTU, chemical parameters as electrical conductivity (μs/cm), total hardness, calcium (CaCO3) hardness, magnesium hardness, alkalinity, calcium, magnesium, fluoride, phosphate, nitrate, nitrite, sulfate, potassium, sodium, chloride, and residual chlorine (mg/L), and pH were 476, 103.06,78.89, 9.80, 76.42, 37.28, 2.45, 0.11, 0.10, 8.3, 0.003, 37.71, 0.37, 68.23, 62.19, 0.74, and 7.60, respectively. Values of microbial parameters were total coliform 0, fecal coliform 0, manufacturer part number (MPN)/100 mL, and heterotrophic plate count (HPC) 2.5 CFU/mL. Conclusion The obtained results indicated that the quality of desalinated water provided from the water desalination plant of Saveh is approved and no health threatening factor was found. The concentration of measured parameters in the study was satisfactory and acceptable, based on IRISI guidelines.
Mona Masoudi; Alireza Davoodian; Mehdi Pajoohesh; Fahimeh Mircholi; Mohammafata Mirsoleimani; Marziyeh Keihanpanah
Volume 22, Issue 2 , May and June 2015, , Pages 516-522
Abstract
Background & Objectives: Limitation of water resources and probability increase of waters pollution resulted from human activities have leaded intensification of control plans for quality of waters. Excremental pollution of water resources is one of substantial problems which their recognition is ...
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Background & Objectives: Limitation of water resources and probability increase of waters pollution resulted from human activities have leaded intensification of control plans for quality of waters. Excremental pollution of water resources is one of substantial problems which their recognition is of great importance in preventing epidemic digestive microbial diseases.
Materials & Methods: For the purpose of conducting study and determining the quality of waters in wells and springs existing in north-west area of Eghlid, sampling was performed from 10 wells and springs in north-west of Eghlid in July 2013 and March 2014, and the water samples of this region were assessed respecting to existed indexes of coliform.
Results: The results showed that the microbial pollution of springs in July was rather than March. Also, the results indicated that average coliform existing in springs was more than the world standards, and some of the springs did not have appropriate quality, so that 10% of samples had coliform pollution, which were related to Ghormas-Beigi spring, and 10% of samples had non-coliform microbial pollution, which were related to Hosseinak aqueduct.
Conclusion: The reason for further average of coliform in springs, in comparison to the world standards, is the pollution of springs with different types of human and bestial sewages which are resulted from the residency of nomads and farmers in the environment of springs.