Mobile Toilet Feces Collection

There are various methods for collecting feces in mobile toilets, mainly including water-flush and non-water-flush suction types, circulating water-flush types, dry packing types, foam sealing types, and microbial types.

Water-flush and non-water-flush suction types: Water-flush mobile toilets use a water-flushing device in the top water tank to flush waste into an integrated feces storage tank at the bottom; non-water-flush types directly receive excreta in a bottom sewage tank. Both methods rely on the sewage tank for storage, but its capacity is limited, and feces need to be regularly transferred to a treatment site using suction equipment (such as a sewage suction truck). This method is suitable for short-term, low-frequency use scenarios but requires frequent maintenance.

Circulating water-flush type: This type is equipped with a biological treatment device that accelerates feces decomposition through intermittent aerobic and anaerobic reactions combined with biological strains. The treated sewage is filtered and then recycled for toilet flushing, forming a closed-loop system. Its advantages lie in water conservation and reduced sewage discharge, but it requires regular supplementation of biological strains and maintenance of the filtration device, making it suitable for areas with scarce water resources or high environmental protection requirements.

Dry packing type: With a non-water-flush design, excreta are directly received by a biodegradable plastic bag below the sanitary fixture, and a new bag is automatically replaced after each use. The used plastic bags are collected centrally and can be rendered harmless through incineration, composting, or professional treatment. This method is simple to operate and odorless, but the cost of plastic bags and subsequent treatment need to be considered, making it suitable for arid or water-scarce areas.

Foam sealing type: It uses foam generated by a foaming liquid mixture to cover the inside of the toilet bowl, replacing the water-flushing function. Urine is treated by a filter screen into reclaimed water, and solid feces are wrapped by the foam to reduce odors. The foam is generated by a compressed air activator, and the foaming agent needs to be regularly replenished. This method is water-saving and hygienic, but the stability of the foam is affected by temperature, so environmental conditions need to be controlled.

Microbial type: It is equipped with highly efficient biological degradation strains that can directly decompose feces into carbon dioxide and water without leakage or odors throughout the process. The strains need to be regularly activated or supplemented and are sensitive to environmental conditions such as temperature and humidity. This method is the most environmentally friendly but has a relatively high initial cost, making it suitable for long-term fixed-use sites.