Mobile Toilet Capacity

The capacity of mobile toilets is typically calculated based on the number of toilet stalls, turnover rate, and supporting facilities, with daily service capabilities ranging from dozens to thousands of people. Specific planning needs to be analyzed in conjunction with the following factors:

1. Number of Toilet Stalls and Basic Service Capacity
Mobile toilets are categorized into three types based on scale:

• Small (3-5 stalls): Suitable for small events or temporary settings, theoretically serving a maximum of 3-5 people simultaneously, but actual capacity needs to be calculated in conjunction with the turnover rate.
• Medium (6-10 stalls): Suitable for medium-sized parks or events, serving 6-10 people simultaneously, with the ability to serve 48-120 people per hour during peak periods (calculated at 8-12 people per stall per hour).
• Large (more than 10 stalls): Equipped with accessible restrooms, baby changing rooms, etc., suitable for large-scale events or transportation hubs, serving more than 10 people simultaneously, with the ability to reach 80-120 people per hour (for 10 stalls) or higher during peak periods.

2. Toilet Stall Turnover Rate as a Core Variable
The turnover rate during peak periods (such as the end of an event) significantly affects capacity:

• Single Stall Efficiency: Can serve 8-12 people per hour, depending on usage frequency and cleaning speed.
• Daily Capacity Estimation: Taking 10 stalls as an example, if operating for 10 hours a day, the daily service capacity during peak periods is 800-1200 people; if usage is not uniform throughout the day, adjustments need to be made based on time distribution.

3. Key Limiting Factors

• Gender Ratio: It is recommended to allocate toilet stalls at a ratio of 1:2 or 1:3 to avoid long queues for women. For example, among 10 stalls, 6-7 should be for women.
• Discharge Method:
  • Flush Type: Requires connection to a water source and sewage network, with a fecal storage tank capacity (e.g., 300 liters) that can support continuous use by 350 people, but requires regular cleaning and transportation.
  • Waterless Packaging/Foam Sealing Type: The fecal storage tank capacity is typically 100-200 liters per stall, with the frequency of cleaning and transportation affecting the actual number of uses.
• Supporting Facilities: Insufficient ventilation, lighting, and sinks can reduce willingness to use, indirectly reducing effective capacity.

4. Industry Standard Planning Criteria
It is recommended to estimate demand by allocating one toilet stall for every 150-200 people. For example, for an event lasting 8 hours with an expected attendance of 5000 people, 25-33 stalls are needed (5000÷150 to 5000÷200). Actual planning needs to be optimized based on factors such as gender ratio and peak time distribution.

Summary: The capacity of mobile toilets needs to be determined through dynamic calculations that take into account the number of toilet stalls, turnover rate, discharge method, and supporting facilities. Reasonable planning can avoid resource waste or supply shortages, ensuring user experience and hygiene standards.