Mobile Toilet Capacity

The capacity of mobile toilets is usually determined comprehensively based on the number of toilet stalls, the capacity of the fecal storage tank, and the usage scenario. The specific classifications and calculation methods are as follows:

1. Capacity classified by the number of toilet stalls
The number of toilet stalls directly affects the number of people that can be served simultaneously. Small mobile public toilets (3-5 stalls) can theoretically serve a maximum of 3-5 people simultaneously and are suitable for small events or temporary scenarios. Medium-sized ones (6-10 stalls) can serve 6-10 people simultaneously and are commonly found in medium-sized parks, scenic spots, or events with a relatively large number of people. Large ones (more than 10 stalls) are usually equipped with barrier-free restrooms and baby care rooms and can serve more than 10 people simultaneously, making them suitable for large-scale events or transportation hubs. It should be noted that in actual use, the ratio of male to female toilet stalls (recommended to be 1:2 or 1:3) should be considered to address the issue of women taking longer to use the restroom.

2. Calculation of daily usage capacity
The capacity during peak hours (such as when an event ends) needs to be estimated based on the service efficiency of toilet stalls. On average, a single toilet stall can serve 8-12 people per hour. For example, a mobile public toilet with 10 stalls can serve 80-120 people per hour during peak hours. If an event lasts for 4 hours, the theoretical daily service volume can reach 320-480 people, but adjustments need to be made based on the cleaning frequency of the toilet stalls and queuing situations.

3. Capacity classified by the capacity of the fecal storage tank
The capacity of the fecal storage tank determines the single-use duration and cleaning cycle. Small mobile toilets have a fecal storage tank capacity of about 300-400 liters and are suitable for small events or camping. Medium-sized ones have a capacity of about 400-500 liters and are suitable for medium-sized outdoor events or exhibitions. Large ones have a capacity of about 500-600 liters and can meet the needs of large-scale events or music festivals. Mobile toilets for the disabled or infants have a capacity of about 200-600 liters and need to be adjusted according to supporting facilities (such as barrier-free handrails and baby care tables).

4. Other influencing factors

• Discharge method: Water-flush toilets need to be connected to a water source and sewage pipe network, and their capacity is limited by the stability of the water supply. Waterless packing or foam-sealing toilets rely on the capacity of the fecal storage tank and require regular cleaning.
• Supporting facilities: Configurations such as ventilation, lighting, and sinks affect the usage experience and frequency. For example, the lack of a sink may reduce the willingness to use the restroom, indirectly reducing the actual capacity.
• Planning suggestions: Estimate the demand based on the expected total number of people and the duration of the event, using the standard of one toilet stall per 150-200 people. For example, an event with 3,000 people requires about 15 toilet stalls (1-2 groups of medium- to large-sized mobile public toilets), and a 10%-20% redundancy should be reserved to cope with sudden peaks.