Structure of Mobile Biochemical Toilets

The structure of mobile biochemical toilets varies depending on the type, with common types including microbial degradation and foam-sealing types. The core structures are as follows:

Microbial Degradation Mobile Toilets

1. Frame and Shell
   Steel frame structures are used as the main support, with exterior walls made of materials such as metal carved panels, aluminum-plastic panels, or color-coated steel. These materials are highly corrosion-resistant, easy to clean, and have low maintenance costs, enabling them to adapt to complex outdoor environments while enhancing the overall aesthetic appeal of the toilet.

2. Internal Treatment System

   • Fecal-urine Separation Device: The toilet is designed with a separation structure, allowing excreta to directly enter the fermentation tank through the toilet, avoiding increased treatment difficulty from mixing.
   • Biochemical Tank: As the core treatment unit, it is filled with supporting media (such as sawdust, straw, etc.) and inoculated with screened and acclimated microbial communities. Through processes like stirring, deodorization, fermentation, and decomposition, microorganisms convert feces into harmless substances.
   • Stirrer and Control System: The stirrer ensures uniform mixing of excreta and microbial strains, while the control system automatically regulates the treatment process (such as stirring frequency and microbial inoculum dosage) to improve treatment efficiency.
   • Temperature Control System: A heating device maintains the temperature inside the biochemical tank within the range of 25-40°C, which is optimal for efficient microbial degradation, ensuring a stable treatment process.

3. Discharge System
   Feces, after microbial decomposition, are converted into carbon dioxide, water vapor, a small amount of ammonia, and non-toxic organic fertilizer. Treated urine can be discharged as reclaimed water or used for irrigation, achieving resource utilization.

Mobile Foam-Sealing Eco-Friendly Toilets

1. Partition and Channel Design
   The toilet compartments are divided into male and female areas using partition walls, with the floor equipped with a toilet pit and separate channels for urine and feces. The urine channel outlet is designed with a slope for quick liquid drainage, while the feces channel contains a piston-type scraper for subsequent cleaning.

2. Transmission and Cleaning Device
   The transmission device connects the power drive unit via a gear shaft and drives the piston-type scraper through a chain. After excreta fall into the feces channel, the scraper pushes them to the biochemical tank, preventing residue and odor diffusion.

3. Foam System
   Foaming liquid is used to generate a large amount of foam covering the toilet fixtures, serving three functions:

   • Odor Sealing: The foam layer isolates air, reducing odor emission;
   • Lubrication of Excreta: Reducing friction between feces and toilet fixtures for easier cleaning;
   • Visual Obscuration: Foam coverage enhances user privacy.

4. Biochemical Tank Treatment
   Excreta slide down through the channels to the biochemical tank, where microorganisms further decompose organic matter, achieving a 98% water-saving rate as an environmental goal. The treated residues can be periodically cleaned and used for composting or harmless treatment.