给水净水工艺的发展（Development of water purification process for water supply）.docVIP

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给水净水工艺的发展（Development of water purification process for water supply）.doc

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给水净水工艺的发展（Development of water purification process for water supply） First, the development process of water purification process The main task of water treatment is to remove the impurities in water by necessary treatment methods, and supply people with reasonable price, good water quality and safe water. In the 70 and twentieth Century 80s, the main problem faced by water supply engineering technicians was the investment efficiency of the project, i.e., how to achieve the simple goal with the lowest total investment of the project. Therefore, in this period, the water purification technology and process many economically, these studies include improved design of sedimentation tank, the inclined tube sedimentation tank, inclined plate sedimentation and flotation tank etc. rapid clarification, and rapid filtration process and flocculation, sedimentation and filtration in ASIC equipment together. By twentieth Century, 90s and 80, however, new problems emerged, namely, the presence of trace organic compounds in drinking water that had a long-term potential hazard to human health. Therefore, there have been new indicators and regulations for water pollution, for example, total three halogenated methane, volatile organic compounds and maximum pollutant concentrations. In order to meet these new situations and meet the requirements of water treatment, engineers and researchers have successfully designed ways to eliminate organic pollutants in water. These methods, such as chemical oxidation, activated carbon adsorption and enhanced coagulation treatment, have been the main research directions for the past more than 10 years. Two. Different water quality parameters correspond to different water treatment processes Looking at the development process of water purification process, we can draw the conclusion that different water quality parameters correspond to different water treatment processes. As shown in table 1. Table 1 the most common water treatment method at presen