Dry Fermentation Mobile Toilet

A dry fermentation mobile toilet is an environmentally friendly sanitation facility that does not require water flushing and decomposes feces through microbial fermentation for resource utilization. Its core principles and characteristics are as follows:

1. Working Principle
Excrement is mixed with highly active biological fillers (such as garden waste, straw, and bacterial mixtures) and then converted into organic fertilizer through microbial decomposition and metabolism. No water is required during the process, and gases such as carbon dioxide and water vapor produced by fermentation are purified by the exhaust system before being discharged, with no odor overflow. Some models are equipped with automatic stirring devices to ensure uniform mixing of feces and fillers. When the tank is full, sensors trigger alarms to prompt the replacement of fillers. For example, the FHJC-02 model from Dalian Fuhua Hengrun Industrial Co., Ltd. uses a composite bioreactor for fully enclosed cyclic treatment, and the treated water can be reused for toilet flushing, further conserving resources.

2. Structure and Function
It adopts a modular design, with the main body being a mobile steel-frame metal-carved panel house that integrates basic functions such as toilet stalls, lighting, and fragrance systems. Core components include a stirring system (to promote fermentation uniformity), an exhaust system (to filter odor gases), and an automatic control system (to monitor the tank's full status and trigger alarms). Some high-end models are also equipped with solar power supply devices, eliminating the need for external power connections and adapting to scenarios without infrastructure.

3. Advantages and Applications

• Environmental Friendliness: Zero emissions and no pollution, forming a closed-loop cycle of "food-feces-organic fertilizer-food" and reducing the risk of chemical pollution.
• Adaptability: No need for municipal sewer networks or power support, suitable for restricted scenarios such as arid regions, ecological protection areas, and tourist attractions. For example, such toilets were used to handle high pedestrian traffic at the 2022 Beijing Winter Olympics and the 2023 Mount Tai scenic area.
• Economy: Long-term savings on water bills and pipeline maintenance costs, with a single cleaning cost of approximately 10-20 yuan, and organic fertilizer generating additional revenue.
• Convenience: Modular assembly, lightweight, and movable, with a short installation period that does not affect site planning.

4. Limitations and Future Improvement Directions
Under current technology, its processing capacity is limited and more suitable for low-frequency usage scenarios (such as temporary events and emergency relief). Some users may not be accustomed to waterless flushing methods. Long-term use requires planning waste transfer routes to avoid secondary pollution. Future improvement directions include optimizing the performance of biological fillers (to improve decomposition efficiency), enhancing odor control technology (such as nanofiltration membrane filtration), and increasing automation (such as remote monitoring systems).

This technology provides an innovative solution for sanitation facilities and ecological protection through microbial metabolism and resource cycling, especially suitable for regions with scarce water resources or weak infrastructure.