تقييم نوعية المياه المعبأة المعاملة بالأوزون في مدينة الحلة

Abstract

Seven commercial brands of packaged water treated by ozone in Hilla city were collected from supermarkets and examined for some physic-chemical and biological tests. The results were compared with national and international standards for drinking water to determine it's quality. It was found that all values for temperature, electrical conductivity, total dissolved solids, turbidity and chlorides within the standard limits for drinking water and classified as fresh sort, their values ranged between 15-22 Co, 129-450S/cm, 59-199 mg/L, 0-14 NTU and 35-217 mg/L, while no values were recorded for dissolved oxygen and biochemical oxygen demand. The results of some samples for bacteria were matched to the standard properties of drinking water which ranged between 0-300 cell/100 mL for total aerobic bacteria, zero for coliform bacteria, 0-5 cell/100 mL for fecal coliform bacteria and 0-4 parasite/100mL. This study indicates that the treatments in all plants were efficient for physic-chemical treatments water and its value were less than the national and international standards for drinking water and the reason of microbial contamination in some brands may be because of the unused of healthy conditions in treatments.