How Are Mobile Toilets Discharged
The sewage discharge methods for mobile toilets mainly include five types: direct discharge and fecal tank, conventional water-flushing, vacuum sewage systems, water-storage sewage systems, and biodegradable systems. Details are as follows:
Direct discharge and fecal tank are relatively basic sewage discharge methods. Direct-discharge mobile toilets require connection to water supply and drainage pipes, with sewage directly discharged into municipal sewage networks or septic tanks, suitable for locations with complete water supply and drainage facilities. Fecal tank-type mobile toilets collect waste in independent containers, which are periodically emptied and cleaned by specialized vehicles, commonly used in temporary settings without sewage pipes. Both methods require basic equipment such as squat toilets, washbasins, and exhaust fans.
Conventional water-flushing toilets achieve sewage discharge through manual or automatic sensing devices, requiring connection to water supply and drainage pipes, with sewage discharged into septic tanks or municipal sewage networks through pipes. This method has relatively low construction costs but relies on a stable water supply, suitable for water-rich environments such as city parks and construction sites, requiring regular cleaning of septic tanks to prevent blockages.
Vacuum sewage systems utilize negative pressure principles, using vacuum pumps to rapidly suck sewage and waste into sealed collection containers. Water consumption is only one-tenth of that of traditional water-flushing systems, effectively preventing leaks and odor diffusion. This system is highly efficient and airtight, suitable for high-end scenic spots and large-scale events with high hygiene requirements, but has relatively high equipment costs and maintenance difficulties.
Water-storage sewage systems store clean water in built-in tanks, with waste discharged into storage tanks after flushing. When the water level reaches a preset value, a flushing cycle is automatically triggered. This method is suitable for locations with sufficient water supply and easy regular cleaning, such as temporary exhibitions and post-disaster reconstruction areas, but requires regular manual removal of waste from storage tanks.
Biodegradable systems use microbial decomposition technology to convert organic matter in sewage into harmless substances such as carbon dioxide and water for discharge, without requiring connection to sewage pipes and without frequent cleaning. This method is highly environmentally friendly, suitable for ecologically sensitive areas such as ecological reserves and remote regions, but has relatively high equipment costs and requires regular replenishment of biological agents.
The sewage discharge ports of all mobile toilets are typically located at the rear, equipped with 110mm sewage pipes and 25mm water inlet pipes, ready for use upon connection. The design of sewage discharge systems must comply with the 'Urban Public Toilet Design Standard CJJ14-2016', with regular cleaning of septic tanks or waste storage containers to prevent pipe blockages and odor generation.
