How Mobile Toilets Collect Feces
There are various ways for mobile toilets to collect feces, mainly including water-flush and non-water-flush suction types, dry-packing types, foam-blocking types, microbial types, vacuum sewage pumps or sealed fecal suction trucks, and traditional drainage ditches (in remote areas).
Water-flush and non-water-flush suction types: Water-flush mobile toilets use built-in water-flush devices to flush feces into the bottom sewage tank with water flow. This method is similar to traditional fixed toilets, but the sewage tank has a limited capacity and requires regular cleaning. The non-water-flush type eliminates the water-flush step and directly receives excreta in the bottom sewage tank. When the sewage tank reaches a certain capacity, suction equipment is needed to promptly extract the feces to prevent overflow and odor generation.
Dry-packing types: These mobile toilets use biodegradable plastic bags to receive excreta. Each time a person uses the toilet, the system automatically replaces the plastic bag to ensure hygiene and convenience. After use, these plastic bags are collected centrally and transported to specialized treatment plants for harmless treatment. This method is suitable for places with a large flow of people and a need for quick cleaning.
Foam-blocking types: Foam-blocking mobile toilets use the rich foam generated by the foaming liquid mixture to cover the inner side of the toilet bowl, forming a sealing layer. Excreta pass through this foam layer and smoothly enter the collection device. Since the foam has lubricating and sealing effects, the system only requires a small amount of hand-washing water to meet the foaming demand, greatly saving water resources.
Microbial types: Microbial mobile toilets use solid-liquid separation devices to filter urine and separate feces for separate treatment. Feces enter the fermentation tank and are mixed with sawdust and biological strains for decomposition, eventually being converted into organic fertilizer. Urine enters a comprehensive treatment system and undergoes processes such as aeration and evaporation to meet discharge standards. This method achieves the resource utilization of feces, being environmentally friendly and efficient.
Vacuum sewage pumps or sealed fecal suction trucks: Some mobile toilets use vacuum sewage pumps or sewage pumps installed below the toilet body to suck excreta and transport it to treatment plants. This method is suitable for occasions where feces need to be transported over long distances. In addition, sealed fecal suction trucks can also be used to directly collect feces, ensuring no leakage or environmental pollution during transportation.
Traditional drainage ditches (in remote areas): In remote areas with poor conditions, drainage ditches may be used to discharge fecal water. Although this method is simple, it requires regular cleaning and maintenance to prevent blockage and odor generation.
