Technological method for controlling disinfection by-product and pathogenic microorganism risk of drinking water

Abstract

The invention relates to a technological method for controlling the disinfection by-product and pathogenic microorganism risk of drinking water, belonging to the field of drinking water treatment. The drinking water is produced by combining biological pretreatment, pre-ozonation, main ozonation, active carbon filter and conventional coagulation-precipitation-sand filtration-disinfectant fluid treatment technology, and the method is a feed water treatment technological method which is developed for the micro-pollution raw water and controls the disinfection by-product and pathogenic microorganism heath risk in the water purifying process. The micro-polluted raw water sequentially enters a biological pretreatment tank, a pre-ozonation contact tank, a folded-plate flocculating tank, an inclined-tube sedimentation tank, a sand filter, a main ozonation contact tank, an active carbon filter and a disinfection tank, and finally flows into a clean water reservoir. Through the application of the biological pretreatment, two-level ozone oxidation and active carbon technology, the removal effect on the turbidity, organic matters, the disinfection by-product precursor, the virus microorganism, bacteria microorganism and the like is obviously improved, and the water quality and safety are obviously superior to those of the traditional coagulation sedimentation technology.

Description

technical field [0001] The invention relates to the technical field of drinking water treatment, in particular to a process method for controlling the risks of disinfection by-products and pathogenic microorganisms in drinking water. Background technique [0002] With the development of industry, agriculture, social economy, and the continuous improvement of human material and cultural life, a large amount of industrial wastewater, agricultural irrigation, chemical fertilizers, pesticides, and domestic sewage are discharged into the natural water body environment, making urban drinking water sources increasingly polluted and becoming micro-polluted. source of water. In particular, the presence of various organic pollutants, viruses, and bacterial microorganisms in water sources significantly increases the risk of disinfection by-products and pathogenic microorganisms that may be produced in drinking water. At present, most urban water plants still use the traditional proces...

AI Technical Summary

Problems solved by technology

However, as the composition of various organic pollutants in slightly polluted water sources becomes more complex and the concentration level gradually increases, in addition to conventional bacterial microorganisms, the pollution of viral microorganisms intensifies, and the traditional drinking water treatment process has become insufficient. On the one hand, It cannot effectively remove the organic matter, especially the dissolved organic matter, resulting in the generation of a large number of toxic and harmful disinfection by-products during the disinfection process, and the chemical health risk of the effluent increases; on the other hand, it is smaller than the protozoa and bacteria. The removal effect of virus-like microorganisms is not ideal, so that the microbial safety of the effluent cannot be guaranteed

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