In fact, coliform group is a crucial indicator in water environmental standards. Its detection can be used to determine the bacterial content in wastewater, and it is often included in the Environmental Quality Standards for Surface Water. In this article, we will briefly learn relevant knowledge about the Environmental Quality Standards for Surface Water!
It should be clearly understood that during water quality assessment, if any indicator fails to meet the standard, the water body is deemed unqualified, and corresponding measures must be taken accordingly. Let’s understand this through several practice questions and explanations!
1.What minimum standard must the water quality meet for general industrial water areas?
Answer: Based on the surface water environment, environmental protection objectives, and functional ranking, Class IV water is applicable to industrial water areas and areas for non-direct human contact. Thus, the water quality must meet this standard.
2.What conditions may occur with dissolved oxygen in water?
The dissolved oxygen content is higher at lower water temperatures and lower in deeper water layers. In addition, the dissolved oxygen in water will continuously decrease in the event of massive organic pollution or algal death, among other situations.
3.The focus of this article: Coliform group! Analysis of the reasons for using coliform group as an indicator bacterium for water pollution.
Coliform group is a microbiological indicator specified in the standards, which mainly reflects the degree of pathogenic contamination in water bodies. Pathogens in water can spread water-borne diseases through drinking or direct contact. Obviously, detecting all pathogens in water is unrealistic, so a representative indicator is selected for monitoring. Since the survival time of coliform group is similar to that of major pathogenic bacteria in the intestinal tract, only this one indicator needs to be tested. Moreover, coliform group can be easily counted in wastewater monitoring, making it a suitable choice as a fecal contamination indicator bacterium.
For real-time monitoring of coliform group in wastewater, the WECT-900 Online Coliform Analyzer produced by Hangzhou Modi can be applied.
