How to Treat Feces in Mobile Toilets
The treatment of feces in mobile toilets primarily relies on the dual effects of biodegradation and physical sedimentation, achieving rapid harmless treatment and reduction of feces through microbial decomposition, anaerobic fermentation, and three-chamber septic tank treatment.
Microbial Decomposition Mode
Specific ratios of high-efficiency composite microbial communities are added to the septic tank. These communities secrete various enzymes to accelerate the decomposition of organic macromolecules in feces, such as proteins, fats, and carbohydrates, converting them into carbon dioxide, water, and simple inorganic salts. This process belongs to aerobic or facultative anaerobic biological treatment, requiring the maintenance of appropriate temperature, pH, and oxygen supply. It is usually accompanied by a ventilation system to provide sufficient oxygen, promoting the activity of aerobic bacteria and achieving a significant reduction in fecal volume and elimination of malodorous gases.
Traditional Anaerobic Fermentation and Sedimentation Separation
After feces enter the septic tank, due to gravity, solid particles with higher density settle to the bottom to form a sludge layer, while lighter floating substances like grease rise to form a scum layer, with a relatively clear sewage layer in the middle. In an oxygen-deficient environment, anaerobic bacteria slowly decompose and digest the deposited sludge, producing biogas and further stabilizing organic matter. Modern mobile toilet designs are typically equipped with odor-proof floor drains, water seals, and forced ventilation systems to prevent blockages and odor overflow. The produced gases are directed to high altitude for discharge through pipes or treated with activated carbon adsorption before being released.
Three-Chamber Septic Tank Treatment
Utilizing the stratified structure with different densities within the septic tank, feces undergo decomposition over a fermentation cycle of more than 30 days. Fresh feces entering the first chamber naturally stratify into an upper糊状 (paste-like) fecal crust, a middle clear fecal liquid, and a lower块状 (lumpy) fecal residue. The middle fecal liquid, containing the least amount of worm eggs, overflows through a fecal pipe to the second chamber for secondary fermentation and eventually flows into the third chamber for storage. Throughout this process, the kill rate of parasitic worm eggs and intestinal pathogens reaches over 95%, while fecal volume is reduced by 60%-70%, and COD (Chemical Oxygen Demand) is reduced by more than 50%.
Other Treatment Methods
These include chemical treatment, anaerobic digestion, compression and storage, manual cleaning of multi-functional sewage outlets, and mechanical treatment, which can be selected based on specific needs and scenarios.
