How Mobile Toilets Dispose of Feces
There are various ways for mobile toilets to dispose of feces, including direct discharge and fecal tanks, vacuum sewage pumps or sealed fecal suction trucks, water-flush and non-water-flush suction types, circulating water-flush types, dry packing types, foam sealing types, microbial degradation types, vacuum adsorption types (vehicle-mounted mobile toilets), and zero-discharge resource utilization technologies.
Direct Discharge and Fecal Tanks: Some mobile toilets use direct discharge methods, expelling feces directly to designated areas or using fecal tanks to collect waste, which is then periodically cleaned. This method is simple and direct, but care must be taken in selecting discharge locations to avoid environmental pollution.
Vacuum Sewage Pumps or Sealed Fecal Suction Trucks: Vacuum sewage pumps or other types of sewage pumps are installed beneath the toilet body to suck in and process waste through pipes. Alternatively, sealed fecal suction trucks can be used to collect feces and transport it to sewage treatment plants for processing. This method is clean, with no odor dispersion, and has a relatively small environmental impact, making it safe and hygienic for use in public places.
Water-Flush and Non-Water-Flush Suction Types: Water-flush types use a water tank to flush feces into a bottom sewage tank, requiring periodic suction of waste from the tank. Non-water-flush types directly receive waste in a sewage tank, which also requires periodic suction. These methods are suitable for locations with water supply or temporary, water-scarce areas.
Circulating Water-Flush Types: These use biofilm technology to treat fecal sewage through aerobic and anaerobic processes, adding microbial strains to accelerate decomposition. The treated water can be recycled for flushing, resulting in significant water savings and reduced suction frequency.
Dry Packing Types: Degradable plastic bags are used to collect waste, with a new bag automatically replaced after each use and then transported to a treatment plant. This method requires no water flushing and is suitable for water-scarce areas without drainage networks.
Foam Sealing Types: Foaming agents generate foam to cover the toilet bowl, blocking odors and lubricating for flushing, with extremely low water consumption. This method is suitable for high-traffic areas or epidemic prevention sites, effectively reducing water consumption and odor dispersion.
Microbial Degradation Types: After solid-liquid separation, solid feces are mixed with wood chips and microbial strains for fermentation, decomposing into carbon dioxide and water; urine is treated into reclaimed water for reuse. This method results in no pollution emissions throughout the process and can also generate organic fertilizer, achieving resource recycling.
