Public Mobile Toilet Design

The design of public mobile toilets should focus on four core aspects: modular structure, environmental protection technology, intelligent management, and all-age friendliness, while balancing functionality and humanized needs.

I. Modular Structural Design

The main structure of public mobile toilets should utilize lightweight yet high-strength materials, such as hot-dip galvanized square tubes or light steel keels, ensuring controllable overall weight and ease of transportation. The standard dimensions for a single toilet cubicle are 1.1 meters in length, 1.2 meters in width, and 2.55 meters in height. Through modular combinations, they can be flexibly expanded into multi-cubicle or multifunctional toilets. The exterior wall materials should balance corrosion resistance and wind resistance, with metal carved panels or color-coated steel sheets recommended. The interior walls should use antibacterial aluminum-plastic panels or bamboo fiber boards to reduce odor retention. The roof should be paved with asphalt shingles and equipped with lifting interfaces for quick installation and disassembly. The foundation design should enhance disaster resistance, using anchoring devices and concrete foundations to withstand typhoons of up to magnitude 9 and earthquakes of up to magnitude 7, ensuring stability in extreme environments.

II. Application of Environmental Protection Technologies

Water conservation and sewage treatment are core environmental protection indicators. Water-saving systems can adopt foam sealing technology, requiring only 0.01 liters of water per flush, achieving a water-saving rate of 98%; or microbial degradation technology, which decomposes feces into harmless substances within 5-7 days through microbial colonies, achieving zero flushing. Sewage treatment should be equipped with septic tanks or vacuum self-priming devices, with sewage pipes having a diameter of no less than 200 millimeters. In northern regions, electric auxiliary heating anti-freeze systems should be installed to prevent pipe freezing. Energy supply can be met by roof photovoltaic panels, which can satisfy the electricity needs of 50 people per day. In special environments like plateaus, booster power systems should be added to ensure stable equipment operation.

III. Intelligent Management System

Real-time monitoring and automated control are achieved through IoT technology:

• Toilet cubicle monitoring: Sensors provide real-time feedback on usage status, preventing user queuing;
• Energy consumption management: Statistics on water and electricity consumption data are collected to optimize resource allocation;
• Equipment warning: Automatic fault alarms shorten maintenance response times.
  Additionally, gravity sensors can provide voice reminders for forgotten items when a person leaves and trigger disinfection sprays; the temperature control system covers extreme environments from -35℃ to 50℃, with a control accuracy of ±1℃, ensuring long-term equipment operation.

IV. All-Age Friendly and Humanized Design

Accessibility facilities are a priority: The slope of the passageway should not exceed 2.7%, with a wheelchair turning space diameter of at least 1.5 meters. The third toilet should be equipped with child safety seats, call buttons, and folding nursing tables. Sanitary facilities include infrared automatic flushing, antibacterial handrails, intelligent paper dispensers, and ultraviolet disinfection lamps to reduce cross-infection risks. Environmental control should strictly limit odor concentrations, with ammonia levels ≤ 0.3 milligrams per cubic meter and hydrogen sulfide levels ≤ 0.01 milligrams per cubic meter, achieving air purification through fresh air systems and activated carbon filtration.

The design should also balance lightness and durability, controlling overall height and width to adapt to different transportation vehicles. The mobile devices (such as wheeled or trailer structures) should ensure easy operation and safe stability.