The quality of drinking water is always one of the leading factors determining the safety of people’s health. The rate of water sources contaminated with bacteria, especially Coliform bacteria in Vietnam is quite high. The content of Coliform bacteria in water is one of the important factors used to assess the level of water pollution.
What is Coliform bacteria?
Coliform bacteria are defined as rod-shaped Gram-negative bacteria that do not have endospores and are either motile or non-motile. Coliform can exist in many different environments such as soil, water (domestic water, drinking water, aquaculture water), in food and waste of animals and also in the human digestive system. This is the culprit that causes many dangerous diseases on the digestive system such as diarrhea, dehydration leading to kidney failure, even death.
Coliform is a very familiar bacteria in the field of domestic and drinking water treatment for humans. Humans base on the amount of Coliform in water to assess the level of water pollution. National technical regulations on coliform bacteria content in water are as follows:
In drinking water (QCVN 01:2009/BYT): Total Coliform content is 0 bacteria/100ml;
In domestic water (QCVN 02:2009/BYT): The allowed total Coliform content is 50 bacteria/100ml;
In industrial wastewater (QCVN 40:2011/BTNMT): The allowed Coliform content is 3000 mg/l for type A wastewater and 5000 mg/l for type B wastewater.
Manifestations when the body is infected with Coliform bacteria
The incubation period after Coliform infection is usually 3-4 days. When the disease develops, the patient will have unclear symptoms such as mild diarrhea, intermittent diarrhea, fatigue, fever… Symptoms of the disease are not specific, so it is easy to confuse them with other diseases.
Danger from Coliform bacteria
Coliform can cause disorders that cause diarrhea, dehydration, blood disorders, kidney failure, or even death. The danger of this bacteria is more serious in the elderly and children because home pure water purifier in bd these are subjects with weak resistance. Meanwhile, the symptoms of the disease are often unclear, mainly diarrhea and fever, so patients are often subjectively ignored. This misses the opportunity for timely treatment of the disease at an early stage.
The harmful effects of coliform bacteria in water
Coliforms in water can cause dehydration, diarrhea, blood disorders, kidney failure or even death
What causes coliform bacteria in water?
Untreated rainwater
Domestic water treatment plants have not thoroughly treated Coliform bacteria
The source of well water has not been treated because the main source of well water is groundwater that has been contaminated with Coliform bacteria
Tap water is contaminated with Coliform bacteria due to flowing through old pipes, rusted due to too long use time
Improper handling of domestic waste, industrial waste and animal feces, not following standard procedures, causes waste containing Coliform bacteria to seep into the ground, seep into groundwater and contaminate water sources. Coliform bacteria
How do you know if there is coliform bacteria in the water?
Check the bacteria content in the water every 6 months;
Check more often if potable water has changes in color or taste.
How to deal with Coliform bacteria in drinking water?
Water should be tested regularly to detect the presence of Coliform bacteria in the water
If the well water, groundwater is contaminated with Coliform bacteria with levels exceeding the permissible limit, it is necessary to use water treatment measures such as using a water purifier to completely purify the water.
Disinfect domestic water with chlorine, ozone, ultraviolet rays
Drink only cooled boiled water or filtered water through a water filter, water purifier
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