Coliform bacteria are intestinal pathogenic bacteria used for water quality monitoring, so why does it become a water quality indicator bacteria? Is there any way to test for coliform bacteria in water? Let’s learn more about the problem!

The Main Reason for Using Coliform Bacteria as Water Quality Index Bacteria!

1.Coliform bacteria exist in large quantities in human feces, so it is easy to detect in water bodies polluted by human feces;

2.The inspection method is simple and convenient;

3.Resistance to chlorine is similar to that of disease-causing gut bacteria. It can be said that the bacteria in the large intestine are eliminated, and the pathogenic intestinal bacteria have been eliminated, and the water can be drunk normally.

How to Choose a Test Method for E. coli?

When it comes to the detection methods of coliform bacteria, there are MPN, filter membrane method, enzyme substrate method and so on. These three methods of detecting coliform bacteria are not comparable. However, the principle of these three detection methods is different, and the amount of inoculation sampling is not the same.

The WECT-900 water coliform online analyzer produced by Hangzhou Modi-Tech uses the enzyme substrate method. The principle that the light signal changes in direct proportion to the reaction between the enzyme and the bacteria culture is then measured to reflect the total amount of coliform bacteria in the water. The instrument is widely used in drinking water online monitoring, medical wastewater online monitoring and so on.