Affiliation:
1. 1 China CDC Key Laboratory of Environment and Population Health, National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases/Department of Water Quality and Population Health Surveillance, National Institute of Environmental and Health, Chinese Center for Disease Control and Prevention, No. 7 Panjiayuan South Li, Chaoyang District, Beijing, China
Abstract
ABSTRACT
Water treatment infrastructure facilities play an important role in ensuring drinking water safety. A survey of the drinking water treatment process was conducted in the urban peripheral areas of Beijing, China, and the impact of the main water treatment infrastructure facilities on microbial contamination was investigated. Sedimentation equipment, filtration facilities, and disinfection equipment were all significantly correlated with the concentration of heterotrophic plate counts in drinking water. The filtration facilities and disinfection equipment were also positively correlated with the concentrations of total coliform and Escherichia coli. The removal of microorganisms by different water disinfection methods gradually decreased in the order of ozone, chlorine, chlorine dioxide, and ultraviolet light. The effects of microbial contamination removal of different water pumping methods were as follows: direct water supply > pressure tank > secondary pressing pump station > water tower > high-level water tank, and the removal effects were 7.6, 7.4, 4.1, 3.6, and 1.7 times that of the self-flowing water supply. This study provides scientific support for the renovation and upgrading of microbial pollution reduction in drinking water in rural areas of the urban periphery.
Funder
China National Critical Project for Science and Technology on Water Pollution Prevention and Control