How to Separate Urine and Feces in Mobile Toilets

There are mainly two methods for separating urine and feces in mobile toilets: microbial and vacuum adsorption types.

Microbial Mobile Toilets: This type of mobile toilet employs a relatively complex solid-liquid separation and treatment system. After a user defecates, the waste passes through an automatically opening toilet bowl into the solid-liquid separation device. This device has a unique design that accurately filters out urine while pushing and separating feces, achieving initial separation of urine and feces. The separated feces then enter a fermentation tank, which contains a screw propeller that continuously rotates to thoroughly mix the initial ingredients, sawdust, biological strains, and feces. Under the action of microbial strains, the organic matter in the feces is gradually decomposed through a series of biochemical reactions, ultimately transforming into relatively stable substances and reducing environmental pollution. The filtered urine enters a comprehensive urine treatment system, where it undergoes multiple processes such as aeration, evaporation, and decolorization. Aeration increases dissolved oxygen in the water, promoting microbial growth and metabolism, which aids in decomposing organic matter in the urine. The evaporation process removes water from the urine, reducing its volume, while decolorization improves its appearance, making it clearer. After these treatments, the urine is converted into reclaimed water, which can be used to flush the urinals, forming a water resource recycling system and significantly improving water utilization efficiency.

Vacuum Adsorption Type (Vehicle-mounted Mobile Toilets): This type of mobile toilet primarily utilizes the strong suction of a vacuum pump to achieve separation and collection of urine and feces. When a user defecates, the vacuum pump starts working, creating negative pressure that rapidly sucks the waste into a collection tank. During this process, due to the vacuum adsorption effect, urine and feces naturally separate, with urine and feces being collected in different areas of the collection tank. This separation method is particularly suitable for vehicle-mounted or mobile scenarios because it not only saves water but also facilitates transportation and treatment. During movement, the collection tank remains relatively stable, preventing leakage and ensuring environmental hygiene and safety. Additionally, since urine and feces are already separated, subsequent treatment is more convenient and efficient.