Where does the toilet explode, how to avoid it?

Many toilet explosions cause casualties, including Vietnam, making many people startled not to know if their toilet is safe.

What is the cause?

Talking to PV, Dr. Nguyen Truong Son - Department of Chemical Engineering at University of Technology, National University of Ho Chi Minh City, said the organic waste from the toilet will be contained in the septic tank (septic tank).

Often the cellar has 3 compartments: compartment, compartment and filter compartment . At the compartment, the waste will ferment anaerobic by microorganisms. The residue of fermentation will settle to the bottom of the compartment.

Gas generated during fermentation includes mainly methane (CH ₄ ), ammonia (NH ₃ ), carbonic (CO ₂ ), hydrogen sulfide (H ₂ S), sulfur dioxide (SO ₂₎ . will be exited to the outdoors under the ventilation tube.

The liquid part will follow a catheter flowing through the settling compartment and the uncompleted sediment in the compartment will settle down in this compartment.

The upper part of the water will flow into the third compartment - prevent the filter and flow into the drain or allow it to enter the soil.

A toilet bowl exploded - (Photo: Daily Mail).

If an improper ventilation pipe is installed or the tube is clogged, the accumulation of gas during the decomposition of organic waste will increase the pressure in the septic tank, which may cause an explosion.

Or when these gases blow through the cracks of the bridge, and meet the fire will burn and explode the bridge.

Dr. Nguyen Truong Son gave advice: the size of the septic tank must be calculated in accordance with the number of users (the amount of waste), and should check the ventilation tube at least once a year to detect cases of stuffy tubes.

What to do to stay safe?

According to Dr. Ngo Thanh An, deputy head of the Department of Science, Technology and Projects, Ho Chi Minh City University of Technology, the cause of fire and explosion is methane. Therefore, attention should be paid to sources of methane gas such as gas stoves, toilets and trash bins.

To ensure safety, avoid leakage of gas from the toilet to the toilet. To do this, a ventilation tube is required to balance the pressure between inside and outside.

Ventilation pipes play a decisive role in removing gas pressure generated from the inside of the septic tank. Therefore, attention must be paid to the design and installation of air vents for septic tanks.

The diameter of the ventilation tube is not less than 60mm, leading up to the roof at least 0.7m to avoid harmful odor and gas. The ventilation tube should not be submerged in the liquid (thus having an air ventilation role).

It is necessary to avoid the construction of septic tanks in flooded areas. Because water from the outside environment can flow into the toilet, flooding the ventilation tube, leads to pressure in the septic tank.

In addition, it should be noted that the connection between the toilet and the sewer pipe should be sealed to avoid gas leakage through this joint.

Dr. An advises not to smoke in the toilet, especially when a strange smell is detected . Instead, it is necessary to find the cause of the gas leak and fix it immediately.

"Besides the toilet, gas stove, also pay attention to the sewer system in the house. Do not open the lid of the drain hole in the bathroom because it can lead gas containing methane, H ₂ S from the sewer system into home, thereby causing choking, stinking, or potentially causing fire , " added Dr. An.