Monitoring plan for drinking water quality during flood season

At present, China has entered the flood season in an all-round way, and continuous rainfall or heavy rainfall has gradually increased.

In May this year, the Ministry of Ecology and Environment issued the "Notice on Strengthening the Supervision of Water Environment in the 2022 Flood Season" (the "Notice"), requiring all localities to strengthen risk prevention and respond well to sudden water pollution incidents

Compared with the non-flood season, there are two main possibilities for the pollution of drinking water during the flood season: First, due to rainstorms and floods, the turbidity of the water body is seriously exceeding the standard, which greatly exceeds the treatment capacity of the waterworks.

For example, during the "8.

Domestic limited standards for drinking water include "GB 5749-2022 Hygienic Standard for Drinking Water", "GB 19298-2014 National Food Safety Standard for Packaged Drinking Water", and "GB 8537-2018 National Food Safety Standard for Drinking Natural Mineral Water".

"GB 5749-2022 Sanitation Standard for Drinking Water"

The testing standards for drinking water mainly include "GB/T 5750.

Hangzhou Dawei Drinking Water Quality Rapid Test:

Applicable instrument: DW-ES800 type microbial real-time detection system

The instrument is divided into two parts: the enzyme-substrate reaction method culture module and the real-time photoelectric detection module.

Hangzhou Dawei drinking water quality monitoring program:

Step 1: Sample Microbial Collection

The microorganisms in the sterilized water sample are enriched by the water microbial membrane filtration device, so that the possible microorganisms are trapped on the filter membrane

Applicable instrument: DW-28 series water microbial membrane filtration device

The instrument is a new generation instrument for microbial detection of water samples containing a small amount of microbial contamination.

Step 2: Cultivate

Transfer the filter membrane to the corresponding medium for culture.

Applicable instrument: DW-100A-K series intelligent anaerobic microorganism culture system

The instrument serves the cultivation of anaerobic bacteria and microaerophilic bacteria required by the national food safety standards, and can choose a specific oxygen concentration (1%-15% optional) and CO2 concentration (5%-15% optional) according to the needs.

Step 3: Colony Counting

The evaluation indicators include the total number of bacteria, coliform bacteria, etc.

Applicable instrument 1: DW-2 series colony counter

The instrument is the latest generation product specially designed and manufactured by Hangzhou Dawei for the "colony count" link in the "classical culture method" microbial experiment.

Applicable instrument 2: DW-V series automatic colony counter

The instrument can quickly read and count microbial colonies, improve statistical efficiency and reduce human errors, and is widely used in cosmetics, university research institutes, CDC, environmental monitoring,

Step 4: Pathogen Detection

Refer to GB 4789 and other relevant standards to determine the pathogenic bacteria items to be tested, and identify them through the automatic microbial biochemical identification system, so as to qualitatively check the pathogenic bacteria in the samples

Applicable instrument: DW-M80 automatic microbial biochemical identification system

The instrument captures the biochemical phenotypic characteristics of bacteria through the principle of biochemical reaction, which can be used for the identification of microorganisms in cosmetics, the identification of food-borne pathogenic bacteria isolates required by the national standard GB 4789 series of food safety microorganism inspection, etc.