Portable Toilet Capacity

The capacity of portable toilets primarily refers to the volume of the waste storage tank (black water tank), usually measured in liters. It can also be assessed based on the number of toilet stalls and turnover rate to measure its service capacity. The specific classifications are as follows:

I. Classification by Waste Storage Tank Capacity

The capacity of the waste storage tank directly affects the continuous usage time of the toilet. Depending on the purpose and design differences, it can be classified into the following three categories:

1. Small Single-Unit Toilets

   • The waste storage tank capacity is approximately 200-300 liters, commonly found in parks, temporary events, etc.
   • Suitable for an average daily usage of 50-100 people, requiring regular cleaning based on actual usage frequency.
   • For example, a single-unit toilet in a park has a 250-liter waste storage tank. If it is used by an average of 80 people per day, it can typically support 2-3 days without cleaning.

2. Medium Trailer-Mounted Toilets

   • The waste storage tank capacity is approximately 400-600 liters, suitable for construction sites, long-term outdoor operations, etc.
   • Can support 3-5 days without cleaning, reducing the need for frequent maintenance.
   • For example, a trailer-mounted toilet at a construction site has a 500-liter waste storage tank. If it is used by an average of 150 people per day, it can typically meet the usage needs for 4 days.

3. Large Container Toilets

   • The waste storage tank capacity can reach 800-1000 liters, with some models equipped with dual waste storage tanks, commonly seen at music festivals, large exhibitions, etc.
   • For example, a container toilet at a music festival has a 900-liter waste storage tank. If it is used by an average of 500 people per day, it can support 2 days without cleaning.

II. Classification by Number of Toilet Stalls and Service Capacity

The service capacity of mobile toilets can be comprehensively calculated based on the number of toilet stalls and turnover rate, specifically divided into the following three categories:

1. Small Mobile Public Toilets

   • The number of toilet stalls is 3-5, suitable for small construction sites, rural gatherings, or temporary events.
   • The theoretical maximum simultaneous service capacity is 3-5 people. During peak hours (such as the end of an event), it can serve 24-60 people per hour (calculated based on 8-12 people per stall per hour).

2. Medium Mobile Public Toilets

   • The number of toilet stalls is 6-10, suitable for medium-sized parks, scenic spots, or events with a larger number of people.
   • The simultaneous service capacity is 6-10 people, with a peak hourly service capacity of 48-120 people.

3. Large Mobile Public Toilets

   • The number of toilet stalls exceeds 10, possibly including accessible toilets and母婴室 (nursing rooms), suitable for large sports events, music festivals, or transportation hubs with high foot traffic.
   • The simultaneous service capacity can exceed 10 people, with a peak hourly service capacity of 80-120 people (based on 10 toilet stalls as an example).

Summary: The capacity of portable toilets needs to be comprehensively evaluated based on the volume of the waste storage tank and the service capacity of the toilet stalls. Small toilets are suitable for low-frequency, short-term usage, while large toilets can meet the needs of high foot traffic and long-term usage. When making a selection, it is necessary to match it according to the usage scenario, average daily foot traffic, and peak hour traffic flow.