Foam Flush Mobile Toilet

Foam flush mobile toilet, also known as foam-type mobile toilet, is a new type of energy-saving and environmentally friendly toilet that uses low-water-content foam to achieve fecal flushing and odor blocking. Its core principles, devices, system composition, and characteristics are as follows:

Working Principle

The foaming liquid is prepared by mixing surfactants, stabilizers, and water in proportion. Through the gas-liquid mixing chamber of the foaming device, dense foam is generated under the push of compressed air, with a volume expansion ratio of 20 to 30 times. A small amount of foaming liquid can cover the surface of the excreta, forming a foam layer: on the one hand, it isolates the air and inhibits the diffusion of odors; on the other hand, it forms a lubricating film on the inner wall of the pipeline, reducing the adhesion of solids and lowering the risk of blockage. The water-free foaming technology proposed in a utility model patent in 2024 optimizes the foaming liquid formula and foaming process, increasing the water-saving rate to over 99%, with a per-person water consumption of only about 0.04 liters.

Core Devices and System Composition

1. Foaming Device: Composed of a foaming cylinder, a liquid storage tank, and a liquid level balancing tank, it uses the U-tube principle to stabilize the amount of foaming liquid and ensure continuous foam generation.
2. Foaming Liquid Storage and Supply Module: The corrosion-resistant polyethylene tank is equipped with a liquid level sensor to monitor the remaining amount of foaming liquid in real-time, preventing foam interruption due to insufficient liquid levels.
3. Pneumatic Foaming Module: Includes an air compressor, an air circuit regulating valve, and a foaming head. The structural design of the foaming head directly affects the uniformity and expansion ratio of the foam. The optimized foaming head can generate finer and more stable foam.
4. Control and Monitoring Module: It senses usage actions through infrared or mechanical sensors, triggers the 'on-demand foaming' program, and automatically adjusts the foaming interval and the amount of foam per foaming to reduce energy consumption.

Characteristics and Adaptability

1. Energy-saving and Environmentally Friendly: The per-person water consumption is extremely low, and the daily power consumption does not exceed 0.2 degrees. Combined with a circulating water system that uses microorganisms to decompose feces, it further reduces resource consumption.
2. Low Maintenance Cost: It integrates a fecal biochemical processor that decomposes feces through microorganisms, reducing the frequency of manual cleaning and extending the service life of the equipment.
3. Significant Odor Control Effect: The foam layer completely covers the excreta, blocking odors at the source, making it suitable for places with high environmental requirements.
4. Strong Environmental Adaptability: The equipment uses lightweight building materials, making it easy to move and install; it has a wide operating temperature range (-40°C to 50°C), but the foaming liquid formula needs to be adjusted according to extreme climates (e.g., in Hubei, the foam stability needs to be improved in summer, and antifreeze components need to be added in winter, along with electric tracing or insulation layer design).

This technology combines physical and chemical means to achieve an efficient, low-consumption, and environmentally friendly toilet solution, especially suitable for places without drainage facilities such as scenic spots and construction sites.