Mobile Toilet Principle Diagram Explanation

The working principle of mobile toilets mainly involves the water injection and flushing system, waste treatment methods, and structural material design. Here is a detailed explanation:

I. Water Injection and Flushing System
The flushing function of mobile toilets relies on an independent water tank design. The hand-washing tank is usually located on the left side. Water can be directly injected by unscrewing the top connector, and the water flow is controlled by stepping on a valve during use to meet hand-cleaning needs. The clean water tank is located at the front on the right side and is also filled with water through the top connector. The stored clean water is used for flushing the toilet. Some high-end models are equipped with a pressure pump device that enhances the flushing force through mechanical pressurization, ensuring that waste quickly enters the treatment system. This system adopts a closed pipeline design to prevent sewage backflow or odor diffusion. Meanwhile, the water tank capacity can be flexibly adjusted according to the usage scenario (such as scenic spots or construction sites), typically ranging from 50 to 200 liters.

II. Waste Treatment Methods

1. Storage-type treatment: The core is a sealed fecal storage tank where waste is directly stored. Chemical deodorizers (such as chlorine-containing disinfectants) or biological agents (such as bacillus bacteria) are added to suppress odor generation and decompose organic matter. The fecal storage tank requires regular cleaning and transportation. The cleaning and transportation cycle is determined by the usage frequency (for example, 3-5 days for 50 people per day) and the tank capacity (usually 200-500 liters).
2. Recirculating water flushing treatment: Equipped with a small filtration system, the flushing water undergoes physical filtration (such as through a sand filter layer) and biological filtration (such as activated carbon adsorption) before being returned to the clean water tank for reuse, achieving a water-saving rate of over 70%. This system requires regular filter element replacement (every 1-2 weeks) and a small amount of clean water replenishment to maintain the circulation.
3. Dry/composting treatment: By adding auxiliary materials such as sawdust and rice husks to cover the waste, microorganisms are utilized for decomposition to achieve harmless treatment. During the decomposition process, it is necessary to maintain a balance of temperature (50-65°C) and humidity (40-60%). The final product is mature organic fertilizer, which is suitable for rural areas or ecological scenic spots.

III. Structural and Material Design
The frame adopts a steel welding process. Channel steel or I-beams are used at the bottom to enhance the load-bearing capacity, and square steel is selected for the columns to ensure structural stability. Wall materials include color-coated steel plates (lightweight and rust-resistant), fiberglass-reinforced plastics (corrosion-resistant), and stainless steel (durable and easy to clean), meeting different environmental requirements. Internally, it is equipped with a toilet (squat or sit type), a hand-washing basin (omitted in some simple models), a storage box (for storing cleaning tools), and a ventilation device (forced exhaust or natural ventilation). The lighting system uses LED lights, which have low power consumption and a long service life. The overall structure conforms to modular design and can be quickly deployed through hoisting, making it suitable for temporary events or areas without fixed sewage discharge pipelines.