How to Handle Feces in Mobile Toilets

The handling methods for feces in mobile toilets vary depending on the type of toilet, mainly including regular suction and centralized treatment, water-flush/non-water-flush suction, recirculating water flush, dry packing, foam sealing, and microbial decomposition.

1. Regular Suction and Centralized Treatment

Mobile toilets typically have a sewage tank at the bottom to collect feces and sewage. When the capacity of the sewage tank approaches its limit, professional personnel use suction equipment to extract the feces and sewage and transport them to a specialized treatment center. The treatment center achieves harmless treatment through biological degradation, chemical treatment, or physical treatment methods. Some of the treated feces can be converted into organic fertilizers for agricultural or greening purposes, realizing resource recycling.

2. Water-Flush and Non-Water-Flush Suction Types

Water-flush mobile toilets use a water tank at the top to flush and clean the toilet bowl, while non-water-flush types directly receive excreta in the sewage tank at the bottom. Both types require regular suction of the sewage tank to prevent overflow. The suction frequency depends on the number of users and the capacity of the sewage tank. In public places, daily or every-other-day suction is usually required to ensure hygiene conditions.

3. Recirculating Water Flush Type

These toilets are equipped with intermittent aerobic and anaerobic treatment devices that accelerate the fermentation and decomposition of fecal sewage by adding biological strains. The treated water is purified through a filtration device and then recirculated for flushing, significantly reducing the number of suction operations and conserving water resources. This technology is suitable for scenarios with water scarcity or long-term use.

4. Dry Packing Type

Biodegradable plastic bags are used to receive excreta, with a new bag automatically replaced after each use. After use, the plastic bags are collected and transported to a treatment plant for harmless disposal. This method does not require water flushing, making waste collection convenient, and the plastic bags are biodegradable, reducing environmental pollution.

5. Foam Sealing Type

Foam is generated by a foaming liquid mixture to cover the inside of the toilet bowl, replacing the flushing function. The foam effectively isolates odors and prevents excreta from splashing, requiring only a small amount of collected hand-washing water to meet the foaming demand, maximizing water conservation. This type is suitable for arid regions or temporary event venues.

6. Microbial Type

Excreta are treated through a solid-liquid separation device, with feces entering a fermentation tank to be mixed and decomposed with biological strains, and urine being treated and then recirculated to flush the urinal, forming a recycled water system. This method achieves on-site decomposition and resource utilization of feces, reducing transportation costs, and is suitable for ecologically sensitive areas or mobile toilets with long-term fixed use.

Precautions:

• Avoid disposing of paper towels, wet wipes, and other debris in public mobile toilets to prevent pipe blockages.
• For RVs or household mobile toilets, chemical decomposition (adding decomposition agents) or bagged collection (using biodegradable bags) can be used to handle feces, and local waste classification rules must be followed.
• Regular maintenance (such as monthly disinfection of the water tank) and wearing gloves during cleaning can ensure hygiene and safety.