Where Does the Feces from Mobile Toilets Go?

The destination of feces from mobile toilets varies depending on the treatment method and technological principles, including natural treatment, septic tank treatment, suction and transportation to treatment plants, recycling treatment, dry packing, foam sealing and subsequent treatment, microbial degradation, vacuum suction transportation, resource-based zero-discharge treatment, and centralized collection by fecal suction trucks, among others.

1. Natural Treatment: Some eco-friendly mobile public toilets are equipped with fecal tanks that utilize bacterial decomposition or parasitic earthworms for biological sedimentation, breaking down organic matter in feces to achieve natural purification.
2. Septic Tank Treatment: Through sedimentation and anaerobic fermentation techniques, suspended solids and colloidal substances in sewage are removed. The purified water can be recycled or discharged into the environment, while the treated feces can be used as fertilizer in infiltration pits.
3. Water-Flush and Waterless Suction Types: Water-flush mobile toilets use water tank flushing to discharge feces into a bottom sewage tank, while waterless suction types directly receive excreta in the sewage tank. Both methods require regular suction, and the feces are ultimately transported by fecal suction trucks to specialized treatment plants for harmless treatment.
4. Recirculating Water-Flush Type: This type uses biofilm technology to treat fecal sewage, with the treated water being recycled for toilet flushing to achieve water conservation. The fecal residue can be further processed, such as into organic fertilizer.
5. Dry Packing Type: Degradable plastic bags are used to collect excreta, which are then transported to treatment plants for subsequent processing, such as composting or incineration.
6. Foam Sealing Type: Foaming liquid is used to cover the toilet bowl, reducing odors and bacterial growth. The excreta need to be cleaned regularly, with the specific destination depending on the subsequent treatment process, which may include transportation to treatment plants or on-site treatment.
7. Microbial Degradation Type: Solid feces are mixed with wood chips and bacterial strains for fermentation, decomposing into carbon dioxide and water. Urine is treated into reclaimed water for reuse, with no pollution emissions throughout the process and the generation of organic fertilizer.
8. Vacuum Suction Type (Vehicle-Mounted Mobile Toilets): A vacuum pump is used to suck excreta into a collection tank, facilitating transportation to treatment plants for subsequent treatment.
9. Resource-Based Zero-Discharge Technology: Such as closed-loop fermentation technology, which converts fecal water into organic fertilizer and water vapor, achieving zero emissions.
10. Centralized Collection by Fecal Suction Trucks: In remote areas or temporary event venues, the feces from mobile toilets are regularly collected by fecal suction trucks and transported to specialized fecal treatment plants for harmless treatment before subsequent disposal.