Mobile Toilet Flushing Principle
The flushing principles of mobile toilets vary depending on their types, mainly including traditional water-flushing, packing, foam-blocking, microbial degradation, and rainwater recycling types, as detailed below:
The flushing principle of traditional water-flushing mobile toilets is similar to that of ordinary household toilets, but with a more compact design. Its core structure is a large-capacity water tank hidden at the bottom of the toilet, which serves both water storage and sewage discharge functions. When flushing, the clean water in the tank flushes the surface of the toilet bowl through pipes, carrying the waste into the bottom sewage tank. Due to the limited capacity of the sewage tank, it needs to be cleaned by a fecal suction truck after a certain period of use to prevent sewage overflow. This type of toilet is suitable for scenarios with convenient water supply conditions but requires regular maintenance.
Packing mobile toilets adopt physical isolation technology to separate waste from the environment through an automatic bagging device. After each use, the system places a new biodegradable garbage bag inside the toilet bowl, and the waste falls directly into the bag and is sealed for storage. This design does not require flushing and only requires regular replacement of garbage bags, making it suitable for areas with water shortages or high environmental protection requirements, such as outdoor activities and temporary construction sites.
Foam-blocking mobile toilets generate a large amount of fine foam through a foaming device to cover the surface of the toilet bowl. The foam layer serves a dual purpose: first, it inhibits the diffusion of odors through physical barriers; second, it reduces the contact area between the waste and the toilet bowl, thereby reducing the amount of flushing water. When flushing, a small amount of clean water mixed with foam can complete the cleaning, resulting in significant water-saving effects. This type of toilet is commonly found in public places such as scenic spots and stations.
Microbial degradation mobile toilets utilize the metabolic activities of specific bacterial strains to decompose waste. A biological reaction chamber is installed below the toilet bowl, containing highly efficient decomposing bacteria. After the waste enters the reaction chamber, the bacteria decompose it into carbon dioxide, water, and a small amount of organic fertilizer, with a decomposition rate of over 99%. The clean water in the decomposition products can be recycled for flushing, forming a closed-loop system. This type of toilet is highly environmentally friendly but requires regular supplementation of bacterial strains and control of reaction conditions.
Some high-end mobile toilets integrate a rainwater collection system, which collects rainwater through a roof water collection device, filters and disinfects it, and stores it in a dedicated water tank for flushing or biological reactions. This design further reduces reliance on external water sources and is suitable for areas with water scarcity or long-term use scenarios.
