Effects Of Water Supply Network To The End Of The Tube On Water Quality

Taking Jinan City water distribution network terminal system as the main object of study, systematic study of factors affecting the quality of the end of the pipe network, the main contents are as follows:(1) According to the status of Jinan City water supply network and the leading end of the pipe, commonly elected four tubes and four kinds of experiments leading to soak screening minimal impact on water quality pipe, faucet (2) on the leading end of the pipe network water turbidity and iron content were compared, combined with biological and chemical stability analyzes its reasons for poor water quality, and the selection of the most suitable for local residents to use the tube (3) by using different disinfectants to detect its impact on the end of the pipe network water quality (4) of the faucet cavity, pipe wall component analysis, Decoding the impact of pipe, faucet on water quality from the microscopic point of view. The main results of the paper are as follows:1. Jinan network by the end of the pipe is mainly PE, PVCU, PPR, steel tube, steel pipe which is immersed in water does not meet the national standard "in drinking water equipment and protective materials hygiene and safety evaluation norms"; the leading end of the main pipe copper alloy faucet, stainless steel faucet, zinc alloy faucet, plastic faucet, copper faucet only lead precipitation amount which exceeds the standard, test results show that the early lead in faucets precipitation concentration higher after two weeks of daily use, the amount of precipitation will lead Great amplitude is reduced to meet national standards, to avoid affecting the health of residents.2. Jinan Hua magpie water is corrosive water, testing water quality evaluation of the chemical stability of the pipe network by the end of the saturation index, stability index, the ratio of calcium carbonate precipitation type and Larsen four indicators, the factory at the end of the water pipe network operation 24 hours, little change in water quality chemical stability.3. the biological stability of water supply network by the end of chlorine, TOC, AOC, BDOC and bacterial count analysis to comprehensive judgments, metal tube chlorine decay significantly higher than the plastic tube; metal pipe plastic pipe below the water TOC; chlorine and BDOC negative correlation, BDOC positive correlation with the total number of bacteria; the impact on aquatic life stability of the metal tube is greater than the plastic tube.4. Of the four pipes, four kinds of 16 kinds of faucet tube collocation, PE-steel, PVCU-steel, PVCU-plastic, PPR-plastic tube with four kinds of line with China’s "drinking water standards" (GB5749-2006) turbidity and iron concentration limits specified in which copper and zinc alloy faucet faucet water turbidity large, copper faucet most susceptible to corrosion of the iron, so iron release the most serious, stainless steel and plastic faucet faucet water quality more stable, turbid low, small water iron concentration, less impact on water quality plastic pipe, galvanized steel and other metal pipe larger impact on water quality and corrosion wall more easily affected by water conditions. Thus, in real life, you should choose a plastic tube as the tube home, and stainless steel and plastic faucet spout faucet as an end, the end of the pipe network to ensure quality and safety.