Natural water bodies may contain numerous microorganisms. To determine whether pathogenic microorganisms are present in water, it is necessary to test specified parameters to assess the presence of such pathogens. However, with the vast variety of microorganisms, testing each one individually would be challenging. In such cases, water quality can be evaluated by testing specific indicators. Let’s explore together with Hangzhou Modi the indicator for detecting microorganisms—the coliform group.
The Significance of Coliform Group in Water Sanitation Assessment!
Coliform bacteria are present in the feces of humans and many other warm-blooded animals. Once excreted, they can be easily detected in water bodies. Moreover, the resistance of coliform bacteria to disinfectants is similar to that of other intestinal pathogenic bacteria. Therefore, when coliform bacteria are eliminated, other intestinal bacteria are also likely to be destroyed. For pathogens with common characteristics, monitoring a single indicator is sufficient. Since coliform groups are easily detectable and abundant in water bodies, they can, to some extent, reflect the contamination status of water by pathogenic microorganisms. Hence, the coliform group holds significant importance in water sanitation assessment.
What Instrument Is Needed to Detect the Coliform Group in Water?
This article introduces an instrument independently developed by Hangzhou Mudi Technology for detecting coliform groups: the WECT-900 Online Coliform Analyzer. This instrument uses the enzyme substrate method and features fully automated control for real-time monitoring of microbial indicators such as total coliforms, total bacterial count, and thermotolerant (fecal) coliforms in water. It is suitable for medical wastewater online monitoring, drinking water, and other water sources for safety and emergency assessments, as well as for bacterial determination. This helps prevent incidents such as water pollution and food poisoning caused by excessive coliform levels. The device is easy to operate and reliable in operation. It automatically performs sample and reagent dispensing, cleaning, and mixing, while also enabling real-time monitoring of the entire process and dynamically displaying reaction curves of the measured parameters. The entire process requires no manual supervision, as it automatically conducts quality control and calibration, ensuring consistency and reliability in monitoring results.
The monitoring process is based on a biosensing technology system. It involves enzymatic and bacterial culture reactions, where changes in optical signals are proportional to the content of total coliforms, total bacterial count, or thermotolerant (fecal) coliforms in the water. The detection environment temperature ranges from 0 to 40°C.
