Where Does the Sewage from Mobile Toilets Go?

The discharge destination of sewage from mobile toilets varies depending on the sewage disposal method, as detailed below:

Conventional Flush Type: These mobile toilets require connection to water supply and drainage pipes, using manual or automatic sensing for sewage disposal. The sewage is directly discharged into septic tanks or municipal sewage networks. This method is suitable for various water-rich environments, such as city streets and parks, ensuring timely sewage discharge and treatment.

Vacuum Sewage System: This system utilizes negative pressure principles, using a vacuum pump to suck sewage and waste into a collection container. This method efficiently and rapidly collects and treats sewage, reducing odors and pollution, and is suitable for places with high hygiene requirements.

Water Storage Sewage System: Waste is flushed into a storage tank using water. When the tank is full, it needs to be cleaned and replaced. This method is relatively simple but requires regular cleaning of the storage tank to prevent sewage overflow and odor generation.

Chemical Treatment Method: By adding appropriate amounts of chemicals such as chlorine gas and sodium hydroxide, waste is separated from water. However, this method does not clearly specify the final destination of the sewage and requires precise control of chemical dosages to avoid secondary pollution.

Biological Treatment Method: Utilizing the decomposition ability of microorganisms, through fluidized bed anaerobic digestion reactors and filtration systems, excreta is converted into reclaimed water suitable for irrigation. This method is both environmentally friendly and economical, enabling the resourceful utilization of sewage.

Recirculating Flush Mobile Toilets: These toilets adopt intermittent aerobic and anaerobic treatment systems combined with biofilm technology to recycle treated sewage for flushing. This method significantly conserves water resources and is suitable for areas with scarce water resources.

Dry Packing Mobile Toilets and Foam Sealing Mobile Toilets: These two methods do not require sewage treatment. The former uses biodegradable plastic bags to collect excreta, while the latter uses foam generated by a special foaming agent to cover the inside of the toilet bowl. They maintain toilet cleanliness by replacing plastic bags and foam, respectively.

Microbial Mobile Toilets: These toilets use solid-liquid separation devices to treat feces and urine separately. Feces are decomposed by microorganisms, while urine is purified into reclaimed water for reuse. This method is both environmentally friendly and efficient, achieving zero sewage discharge.

In addition, properly treated excreta from mobile toilets can also serve as high-quality organic fertilizer for agricultural use, increasing soil fertility and promoting crop growth. When other treatment methods are not feasible, landfilling can be considered as an alternative, but given the limited land resources, this is by no means a long-term solution.