Mobile Toilet Drainage Principle
The drainage principles of mobile toilets vary depending on the type, mainly divided into five types: conventional flushing, vacuum sewage systems, water-storage sewage systems, recirculating flushing, and dry-packing systems.
Conventional flushing mobile toilets require connection to water supply and drainage pipes, with a drainage principle similar to that of ordinary household toilets. Flushing is triggered manually or by automatic sensors, flushing waste into the drainage pipes, which ultimately discharge the sewage into septic tanks or municipal sewer networks. This method relies on a stable water supply and drainage system and is suitable for locations with water supply and drainage facilities, such as urban public areas or large event venues.
Vacuum sewage systems utilize negative pressure principles for efficient drainage. The system creates a negative pressure environment in the pipes through a vacuum pump. When a user flushes, sewage and waste are rapidly sucked into a collection container under negative pressure. When the sewage in the container reaches a preset level, the vacuum pump automatically starts, pumping the sewage to treatment facilities. This method uses only one-tenth of the water compared to conventional flushing and has strong pipe sealing, effectively preventing sewage leakage and odor diffusion. It is suitable for water-scarce areas or locations with high hygiene requirements.
Water-storage sewage systems complete the drainage cycle through built-in water storage tanks. During flushing, waste is discharged into the water storage tank. When the tank reaches its capacity limit, it requires manual cleaning or replacement. This method is simple in structure but requires regular maintenance and is suitable for locations with sufficient water supply and easy cleaning, such as construction sites or temporary event venues.
Recirculating flushing mobile toilets employ biological treatment technology for water resource recycling. The system is equipped with intermittent aerobic and anaerobic treatment units, accelerating the fermentation and decomposition of fecal sewage by adding biological strains and utilizing biofilm technology. The treated water is purified through filtration units and reused for flushing toilet fixtures. This method can save over 80% of water resources and reduce sewage pumping frequency, suitable for regions with water scarcity or strict environmental requirements.
Dry-packing mobile toilets require no water at all, with their drainage principle based on physical collection. Excrement falls directly into biodegradable plastic bags. After each use, the system automatically replaces the bag with a new one. Full plastic bags are collected centrally and undergo harmless treatment. This method produces no sewage and facilitates convenient waste collection, suitable for water-scarce areas or scenarios with high mobility requirements, such as outdoor expeditions or disaster relief sites.
