How to Treat Water in Mobile Toilets

The treatment methods for water in mobile toilets vary depending on the type of toilet, mainly including regular suction, recycling, harmless disposal, and connection to municipal systems.

1. Regular Suction Treatment
   The sewage tanks of flush and non-flush suction-type mobile toilets have relatively small capacities and require regular transportation of sewage by specialized vehicles to sewage treatment plants or designated locations for centralized treatment. In foam-sealed mobile toilets, the sewage mixes with foam and enters a collection tank, which also requires regular suction treatment. The storage tank collection method also falls into this category and is suitable for short-term use scenarios. When the tank is full, the sewage is pumped out by a suction truck and transported to a sewage treatment plant.

2. Recycling Treatment
   Circular-flush mobile toilets are equipped with intermittent aerobic and anaerobic treatment devices, to which biological strains are added. Biomembrane technology is used to accelerate the fermentation and decomposition of fecal sewage. The treated water is then filtered and recycled for flushing toilet fixtures, forming a closed-loop system. Microbial mobile toilets treat urine through processes such as aeration, evaporation, and decolorization to produce reclaimed water, which is then used to flush the urinals, creating a cycle. Water circulation systems separate and filter urine to achieve partial water resource recycling, resulting in significant water conservation.

3. Harmless Disposal
   Dry-pack mobile toilets do not have flushing devices. Excreta is collected in biodegradable plastic bags beneath the fixtures, which are automatically replaced after each use. The used bags are then collected and transported to a treatment plant for harmless disposal, such as composting or incineration. Microbial mobile toilets introduce feces into a fermentation tank, where it is mixed with sawdust and biological strains and decomposed by microorganisms into CO₂ and H₂O, with a degradation rate of ≥99%.

4. Connection to Municipal Systems for Treatment
   Conventional flush mobile toilets require connection to water supply and drainage pipes. Sewage is discharged manually or automatically into septic tanks or municipal sewer networks. Vacuum sewage system mobile toilets use negative pressure principles, with vacuum pumps sucking sewage and waste into collection containers, which are ultimately discharged into the municipal sewer network. Water-storage sewage system mobile toilets use flushing to discharge waste into storage tanks. When the tanks are full, they are cleaned and connected to the municipal system.

5. Biochemical Treatment
   Sewage is purified through microbial degradation technology and can be directly discharged once it meets standards. This method is commonly used in long-term settings such as scenic spots and exhibitions.