How to Flush Feces in Mobile Toilets

The flushing method for feces in mobile toilets mainly depends on the type of flushing system. Common high-pressure air-water flushing and foam flushing systems achieve cleanliness through different principles, as detailed below:

High-Pressure Air-Water Flushing: Synergy of Water Flow and Gas

The flushing system of this type of mobile toilet consists of a high-pressure water pump, an air storage tank, an infrared sensor, and an intelligent control module. After the user leaves, the infrared sensor detects the signal and triggers the computer's intelligent system to start the flushing program. At this point, the air storage tank releases high-pressure gas, which mixes with the water flow delivered by the water pump, forming a high-pressure air-water mixture with a pressure of 0.3 - 0.5 MPa. This mixture is sprayed out through nozzles in a fan-shaped or spiral pattern, covering the inner walls of the toilet bowl and the drainage outlet. This design utilizes the expansibility of gas to enhance the impact force of the water flow while expanding the flushing area, ensuring that feces and residues are thoroughly flushed into the drainage pipe. Due to the improved water utilization efficiency from the air-water mixture, the single flush volume is only one-fifth of that of a regular toilet (approximately 1 - 2 liters), significantly saving water resources. The flushing process is fully automated, requiring no manual operation, and the sensitivity of the infrared sensor prevents false or missed flushes.

Foam Flushing: Foam Layer Replaces Traditional Flushing

The core of the foam flushing system is the automatic foaming device in the equipment room. It mixes foaming agent and water in a ratio of 1:20 - 1:30 using compressed air to generate a large amount of fine foam. This foam is transported through pipes to the toilet bowl, forming a 3 - 5 cm thick snow-white foam layer that completely covers the inner walls of the toilet bowl and the water surface. When feces fall in, the adhesive property of the foam quickly wraps them and slides them into the drainage outlet. At the same time, the surfactants in the foam can decompose organic matter, reducing adhesion. In addition, the foam layer effectively blocks the emission of odors and prevents sewage splashing, keeping the interior of the toilet clean. This system does not require flushing after each use; it only needs regular replenishment of the foaming liquid (usually every 200 - 300 uses), with a daily water consumption as low as 0.1 - 0.2 liters per person, making the water-saving effect even more remarkable. The lubricating effect of the foam also reduces wear on the inner walls of the toilet bowl, extending the equipment's lifespan.

Both flushing methods achieve efficient cleanliness through physical principles. The high-pressure air-water flushing focuses on impact force and coverage area, suitable for scenarios with high foot traffic. The foam flushing, on the other hand, combines chemical and physical methods to maintain environmental hygiene while achieving extreme water conservation, often used in water-scarce areas or ecologically sensitive regions.