Feces in Domestic Mobile Toilets
There are various ways to handle feces in domestic mobile toilets, and the choice should be made based on the type of equipment, usage scenarios, and environmental protection requirements, with the core goal of reducing pollution and ensuring public health and safety.
Chemical treatment: Chemical agents are added to decompose excrement, suppress odors, and accelerate the decomposition process. The residual substances after treatment can be further processed through specialized equipment or directly discharged into the sewage system. This method is easy to operate and suitable for short-term usage scenarios, but attention should be paid to the environmental friendliness and residue issues of the chemical agents.
Anaerobic digestion: Microorganisms are used to decompose organic matter in an oxygen-free environment, generating biogas (which can be used as an energy source) and fertilizer (which can be used in agriculture or horticulture). This method is suitable for scenarios that are far from municipal treatment facilities for a long time, such as remote areas or outdoor construction sites, but regular maintenance of the digestion equipment is required to ensure efficiency.
Compression and storage: Mechanical compression is used to reduce the volume of excrement and delay the need for treatment. It is commonly seen in camping or temporary construction sites and requires regular cleaning and transportation to avoid insufficient storage space or sanitation issues.
Multi-functional sewage outlet design: Equipped with a feces storage tank or a pre-buried septic tank, it requires regular manual cleaning and centralized treatment. This method relies on manual maintenance and is suitable for scenarios with a fixed cleaning cycle, but it is necessary to ensure that the cleaning frequency meets sanitation standards.
Mechanical treatment technology: Solid-liquid separation, decomposition, and disinfection equipment are used to reduce environmental impact. For example, solid-liquid separation is achieved through centrifugation or filtration, and then the solid is subjected to high-temperature disinfection or chemical treatment, while the liquid is purified and then discharged or reused.
Water-flush and waterless-flush suction types: The water-flush type relies on the circulation of a water tank and a sewage tank, while the waterless-flush type directly receives excrement in the sewage tank. Both require regular suction to prevent overflow. The former is suitable for scenarios with a water source, while the latter is more water-saving but requires frequent cleaning.
Recirculating water-flush type: It is equipped with intermittent aerobic and anaerobic treatment devices, and biological strains are added to accelerate fermentation and decomposition. After filtration, the water is recirculated for flushing. This method significantly saves water resources, but the equipment cost is relatively high and is suitable for long-term usage scenarios.
Dry-packing type: Degradable plastic bags are used to receive excrement, and a new bag is automatically replaced after each use. The used bags are collected and transported to a treatment plant. This method does not require a water source, but issues such as the degradation cycle of the plastic bags and transportation costs need to be addressed.
Foam-sealing type: Foam generated by a foaming liquid mixture covers the inside of the toilet bowl, replacing water flushing and preventing odor diffusion. This method has a significant water-saving effect, but the foaming liquid needs to be replenished regularly, and the equipment has high requirements for airtightness.
