Mobile Toilet Fecal Collection Tank
The fecal collection tank of a mobile toilet is a crucial component for collecting and storing fecal wastewater, commonly referred to as a fecal wastewater storage tank. Here is a detailed explanation of its structure, functions, and design considerations:
1. Basic Structure and Materials
Fecal wastewater storage tanks are generally made of high-strength, corrosion-resistant engineering plastics (such as polyethylene) or metal materials (such as stainless steel) to ensure long-term sealing and durability. The tank body is usually designed as a cuboid or cylinder, with a smooth interior and no dead corners, facilitating easy cleaning and maintenance. Some high-end models adopt a double-layer structure with thermal insulation material filled in between to adapt to extreme temperature environments.
2. Capacity and Adaptability
The capacity of the storage tank is designed according to the usage scenarios and frequency of the mobile toilet, with common specifications ranging from 100 liters to 1000 liters. For example, scenic spots or temporary event venues may choose large-capacity tanks of over 500 liters, while small construction sites may use compact designs of around 200 liters. The tank size must match the overall structure of the mobile toilet to ensure stable installation without affecting the layout of other components (such as the flushing system and ventilation ducts).
3. Sealing and Odor Control Design
To prevent odor leakage, the storage tank is usually equipped with a double-sealing structure: a rubber sealing ring is used at the connection between the tank body and the toilet base, and a one-way valve or float valve is installed at the fecal inlet to ensure automatic closure after feces enter. Some models also install activated carbon filtration devices or exhaust pipes at the top of the tank body to further reduce odor diffusion through physical adsorption or negative pressure suction.
4. Discharge and Cleaning Mechanism
The bottom of the storage tank is equipped with a discharge port, which can be connected to a sewage suction truck or drainage pipe via a quick connector for cleaning. Some designs adopt a modular structure, allowing the entire tank body to be disassembled for easy manual handling and cleaning. To extend the cleaning cycle, some high-end mobile toilets are equipped with solid-liquid separation devices that filter or evaporate the liquid portion of feces to reduce the volume of solid waste.
5. Auxiliary Functions and Safety
Some storage tanks integrate liquid level sensors that automatically trigger an alarm system when the capacity reaches 80%, reminding management personnel to clean it in a timely manner. In addition, the exterior of the tank body is usually equipped with anti-slip handles and reinforced frames to prevent tipping or damage during transportation or cleaning.
