Drinking water quality testing(2)

- Dec 11, 2019-

主图1.2 Routine analysis of test results


1.2.1 pH test results and analysis


After using an electronic pH tester to test each measurement point, the following results were obtained: The pH value of water in the three measurement points was basically the same, with a range of 6.84 to 7.95, which indicated that the pH of the drinking water in the water plant was The value is in accordance with the requirements given by the drinking water hygiene standard issued by the Ministry of Health. From the perspective of the change in pH value, the pH value of water in the water plant is significantly lower than the pH value of water in the pipe network, which indicates that the pH value of water has increased in the pipe network, which may be related to the pipe network. Net environment.


1.2.2 Detection results and analysis of water turbidity


The intelligent scattering scattering turbidity meter was used to test the three measurement points and obtained the following results: The turbidity values of the water at the three measurement points were all less than 1.0NTU, indicating that the turbidity of the drinking water in the water plant met the national drinking water sanitary standards Specify requirements. The turbidity of the factory water is much lower than that of the pipe network water, which indicates that the pipe network will have a certain effect on the turbidity of drinking water.


1.2.3 Test results and analysis of aluminum


The aluminum reagent colorimetric method was used to detect the aluminum content of water in the three measurement points and the following results were obtained: The aluminum ion content of water in the three measurement points changed within the range of 0.04 to 0.48, and the aluminum ion content was <0.05. mg / L only accounts for 2% of the total number of tests, and the value of aluminum ion content <0.2mg / L accounts for about 60% of the total number of tests, which indicates that the aluminum ion content in drinking water in this water plant has exceeded the standard and needs to be taken Effective methods and measures are taken to ensure water quality safety.


1.2.4 TOC and test results and analysis


After testing, the TOC values in the three test points were 2.039 to 4.687 mg / L, 2.047 to 4.568 mg / L, and 2.373 to 5.247 mg / L. In the A test point, 23% of the water TOC failed. In the B test point, 5% of the water TOC failed. In the C test point, 30% of the water TOC failed. This is one of the issues that the water plant needs to focus on. Due to the existence of TOC, there is an increase in TOC in all three measurement points.


1.2.5 Detection Results and Analysis of Residual Chlorine


After testing, the residual chlorine in the 3 measuring points was only in the C measuring point, that is, 10% of the water in the end of the pipe network did not meet the requirements of the sanitary standards for drinking water. It shows that the residual chlorine is related to the distance of the pipe network.


1.2.6 Detection results and analysis of microorganisms


After testing, the total number of bacteria in the three test points decreased with time, and the total number of bacteria in the C test point was the largest. This indicates that the total number of bacteria is related to the length of the pipe network, and the coliform group 1 was detected in the A test point. Times, B times 2 times, and C times 4 times.


2. Conclusion


In summary, the safety of drinking water quality is of great importance. To this end, it is necessary to carry out a comprehensive and systematic test of drinking water and analyze it based on the test results. Based on this, effective methods and measures must be taken to solve problems in water quality It should be addressed to improve the water quality safety of domestic drinking water.

主图