For the water purifier effluent detection 'total number of colonies' indicator, the industry has previously discussed, it is considered that the indicator should be removed from the water purification device effluent determination of qualified test items, because according to the National Food Safety Standard Packaging Drinking Water ( GB19298-2014) The new national standard regulations, from January 1, 2016, the requirements for bottled water, the total number of 'colonies' of bottled water and bacteria such as mold and yeast have been removed. Recently, the industry has re-examined this indicator. Once discussed, mentioning 'bacteria', most people are ignorant, and even 'talking about color'. In fact, bacteria are not so terrible, then the concept of 'total number of colonies' needs to be considered.
In fact, bacteria contain both beneficial bacteria and neutral bacteria, while covering harmful bacteria. For example, lactobacilli, Bifidobacterium, etc. are beneficial bacteria, which are contained in our milk yoghurt. Harmful bacteria such as typhoid, cholera, bacillary sputum, etc. They are collectively referred to as 'pathogenic bacteria'. Then there are neutral bacteria, which are neither beneficial nor harmless bacteria, and there is nothing to worry about. At present, there are few beneficial bacteria in the water, and few harmful bacteria. For example, neutral bacteria that enter the water by air are neither beneficial nor harmful to the human body and will not adversely affect human health.
Western countries are very loose on 'total number of colonies'
Experts in the industry pointed out that according to the relevant US standards, the total number of colonies is only a technical evaluation index, not a product quality indicator.
The 'total number of colonies' in drinking water in the United States is no more than 500 per milliliter, while in China it is only 100, much tighter than the United States! If there is a water purifier produced by a company, other indicators of the effluent quality are qualified, very Well, the total number of colonies that have only water is more than 200. It is not qualified according to Chinese standards, but it is qualified according to American standards, and it is very good.
If the total number of colonies is too low, it will inevitably be over-sterilized, and the disinfection by-products are 'three (carcinogenic, mutagenic, causative)', and the damage is much greater.
Domestic water purifiers should be combined with internal control and key detection
Regarding how to treat the total number of colonies, and the bacteria in the water may exceed the standard, the parties also gave their opinions. 'In fact, look back, the bottled water, bottled water and water purifier were unqualified, a large part It was because 'the total number of colonies exceeded the standard' and was fined. 'An industry insider said, 'Since the packaged water (bottled water, bottled water) has canceled this monitoring indicator, the water purifier should also be released, only need to grasp Several key bacterial indicators such as E. coli can be used. It is not necessary to continue to perform the total number of colonies.
An industry expert also believes that according to the newly released 'Food Safety Law', 'the total number of colonies' is only an internal evaluation index of purification efficiency in the production process, rather than as a product quality indicator. If it exceeds the standard, the production process must be strengthened.