Mobile Toilet Excrement Treatment
There are various methods for treating the excrement from mobile toilets, mainly including flushing, chemical treatment, biological treatment, and physical treatment, as detailed below:
Flushing Treatment
Conventional flushing systems require connection to water supply and drainage pipes, discharging sewage to septic tanks or municipal sewer networks, suitable for locations with well-established infrastructure. Vacuum sewage systems utilize negative pressure principles, drawing sewage and waste into collection containers via vacuum pumps, offering high efficiency and low water consumption, effectively preventing leaks and odor dispersion, commonly used in scenarios with high hygiene requirements. Water storage sewage systems flush waste into storage tanks, requiring manual cleaning or replacement once full, suitable for locations with sufficient water supply and easy cleaning access. Among flushing and non-flushing suction systems, flushing types have water and sewage tanks, while non-flushing types rely solely on sewage tanks to receive excrement, requiring regular suction, offering higher flexibility. Recirculating flushing systems are equipped with intermittent aerobic and anaerobic treatment units, adding biological bacteria to accelerate fermentation and decomposition, with treated water recirculated for flushing, achieving water resource recycling.
Chemical and Biological Treatment
Chemical treatment uses chemical agents to decompose excrement, controlling odors and promoting decomposition, with treated excrement further processed through specialized equipment or sewage systems, offering relatively simple operation. Anaerobic digestion utilizes microorganisms to decompose excrement, producing biogas (usable for energy) and fertilizer (usable for agriculture or horticulture), suitable for situations requiring prolonged absence from treatment facilities, achieving resource utilization. Microbial types decompose excrement through microorganisms, generating gases and liquids, with gases collectable for utilization or emission and liquids usable as organic fertilizers, being environmentally friendly and sustainable.
Physical Treatment
Compression and storage reduce excrement volume through compression, delaying treatment needs, suitable for camping or remote construction sites, facilitating temporary storage and subsequent treatment. Multi-functional drainage outlets are equipped with fecal storage tanks or pre-buried septic tanks, requiring manual cleaning and centralized fecal treatment, suitable for decentralized toilets. Dry packing types use biodegradable plastic bags to receive excrement, automatically replaced after each use, collected centrally and transported to treatment plants, avoiding secondary pollution. Foam sealing types utilize foam generated by foaming liquid mixtures instead of flushing water, conserving water resources and sealing odors, suitable for water-scarce regions. Mechanical treatment employs specialized equipment for solid-liquid separation, decomposition, and disinfection, reducing environmental impact and offering high treatment efficiency.
