Operation of Mobile Toilets
The working principle of mobile toilets primarily revolves around the collection, treatment, and discharge of waste, with different types employing differentiated technologies to achieve functionality while being equipped with ventilation systems to maintain fresh air.
Traditional flush-type mobile toilets operate similarly to fixed toilets, with a large-capacity water tank at the bottom to store sewage. Water flow is used to flush excrement into a storage tank. After use, it is necessary to regularly contact a fecal suction truck to clean the mixed waste in the storage tank to prevent overflow. Their advantage lies in a usage habit close to that of conventional toilets, but they rely on external cleaning services and consume a relatively large amount of water.
Packaging-type mobile toilets utilize mechanical sealing technology, with a motor-driven device directly packing excrement into biodegradable plastic bags. After each use, the plastic bag is automatically sealed and replaced with a new one, achieving complete isolation of excrement from the outside environment. The filled plastic bags can be transported collectively to a treatment plant for composting or incineration, featuring odorlessness and convenient mobility, but requiring regular replacement of consumables.
Foam-sealing mobile toilets generate high-density foam through a foaming device to cover the inner walls of the toilet bowl. The foam layer not only prevents odor diffusion but also reduces flushing water consumption. After excrement falls into the storage tank below the foam, the foam continuously covers the surface to form a sealing layer. This type requires only 1/10 of the water consumption of traditional toilets per use but requires regular replenishment of foaming liquid and cleaning of the storage tank.
Microbial degradation mobile toilets utilize specific bacterial strains to decompose excrement at temperatures between 35-60℃, converting it into water and carbon dioxide through aerobic fermentation. Some models are equipped with stirring devices to accelerate decomposition, with the treated residue volume reduced by about 90%, directly usable for greening and fertilization. This technology requires strict control of temperature and humidity and regular replenishment of bacterial strains, suitable for long-term fixed usage scenarios.
Circulating filtration and chemical treatment mobile toilets purify liquids such as urine through a multi-stage filtration system, with the treated clean water flowing back to the flushing water tank for recycling. The solid portion is disinfected with chemical agents and compressed for storage, significantly reducing waste volume. This type requires professional filtration equipment and chemical dosing systems, with relatively high maintenance costs but outstanding environmental benefits.
All mobile toilets are equipped with ventilation systems. Naturally ventilated models achieve air circulation through top exhaust vents, while forced ventilation models are equipped with exhaust fans to accelerate odor discharge. Some high-end models also add activated carbon filter layers or ultraviolet sterilization devices to further purify the internal air of the toilet and enhance usage comfort.
