Chinese Urban Mobile Toilets

Mobile toilets in Chinese cities are facilities that can be moved as a whole and placed at fixed or temporary locations to provide public restroom services.

I. Suitable Locations Mobile toilets are suitable for stations, docks, tourist attractions, newly built residential areas, large construction sites, squares, densely populated public places, and bustling commercial streets. For example, in 2023, the Lanzhou Yellow River Scenic Area deployed mobile toilets to fill the supply gap in areas where fixed public toilets were difficult to construct, optimizing the layout of public services.

II. Structure and Classification

1. Component Structure: It includes modules such as fecal sewage storage tanks (or disposal units), floor slabs, sanitary ware, walls, washing equipment, water tanks, roofs, and mobile devices.
2. Structural Forms: They are divided into single-unit structures (independent units) and composite structures (combinations of multiple modules).
3. Mobility Methods: These include lifting/handling types (requiring external equipment for movement), powered/trailer types (with built-in power or capable of being towed), and others.
4. Sewage Treatment Methods:
   • Water-flush and non-water-flush suction types: Rely on water sources for flushing or regular suction of feces;
   • Recirculating water-flush types: Achieve water resource recycling through filtration systems;
   • Dry-pack types: Use biodegradable materials to encapsulate feces, requiring no water source.

III. Design Principles

1. Mobility Convenience: The overall structure is lightweight, with priority given to lightweight and durable materials (such as aluminum alloy and high-strength plastics), while controlling height and width to meet transportation requirements.
2. Environmental Protection and Durability: Corrosion-resistant materials are used to reduce environmental impact; mobile devices must be reasonably designed to ensure stability after multiple disassemblies and assemblies.
3. Functional Optimization: In some scenarios (such as cultural and tourism areas), humanized designs are incorporated. For example, new Chinese-style mobile toilets feature flat roofs, red wood-grain exterior walls, and additional public washing areas, bathroom cabinets, and beauty mirrors to enhance the user experience.

IV. Application and Optimization Mobile toilets not only meet temporary needs but also compensate for the inadequate layout of fixed public toilets through dynamic adjustments. For example, cities optimize the distribution of mobile toilets based on tourist feedback or temporarily add facilities during large-scale events. Additionally, in cultural and tourism settings, the design of mobile toilets emphasizes integration with the surrounding environment, serving as a functional complement to public spaces.