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What is the Size of the Fecal Storage Tank in Mobile Toilets

Admin October 09, 2026

The capacity of fecal storage tanks in mobile toilets typically ranges from 30 liters to 1500 liters, varying according to the usage scenario, design specifications, and type. Here is a detailed classification description:

1. Capacity of Regular Mobile Toilet Fecal Storage Tanks
Based on usage scenarios and design specifications, the capacity of regular mobile toilet fecal storage tanks can be divided into three categories:

  • Small Capacity (500-800 liters): Suitable for scenarios with a relatively low daily user count (approximately 50-100 people), such as small construction sites and temporary checkpoints. These fecal storage tanks can meet usage needs for 2-3 days, reducing the frequency of cleaning, and are suitable for environments with limited space or low foot traffic.
  • Medium Capacity (800-1200 liters): Suitable for medium-scale occasions, such as outdoor exhibitions and small music festivals, serving 100-200 people per day. Their capacity design can sustain a usage cycle of 1-2 days, balancing capacity with cleaning convenience.
  • Large Capacity (1200-1500 liters): Primarily used in scenarios with high foot traffic, such as sports events and large gatherings, meeting the needs of 200-300 people per day. These fecal storage tanks reduce the frequency of frequent cleaning by increasing capacity, enhancing usage efficiency.

2. Capacity of Special Types of Mobile Toilet Fecal Storage Tanks

  • Direct-Discharge Mobile Toilets: The fecal storage tanks of these toilets usually have a smaller capacity, with common specifications of 300 liters and 500 liters. Their design feature is direct discharge through pipelines to external treatment systems, so the fecal storage tank only serves as temporary storage, with lower capacity requirements.
  • Some Portable Mobile Toilets: The fecal tank has an allowable volume of about 45 liters, suitable for extremely compact or temporary needs, such as personal camping and emergency rescue scenarios. This design prioritizes portability, sacrificing some usage duration for capacity.

3. Core Logic for Capacity Selection
The selection of fecal storage tank capacity requires comprehensive consideration of the foot traffic, usage duration, and cleaning conditions of the usage scenario. For example, high-foot-traffic scenarios should prioritize large capacities to reduce cleaning frequency; while temporary, low-frequency usage scenarios can reduce costs and space occupation with small capacities. Additionally, the capacity design of direct-discharge or portable toilets should match the配套 (supporting) treatment systems or cleaning methods to ensure functional integrity.