Standard Classification of Mobile Toilets
The standard classification of mobile toilets is mainly divided into four categories: structural form, mobility method, sewage treatment method, and material.
In terms of structural form, they can be classified into single-structure mobile toilets and composite-structure mobile toilets. Single-structure mobile toilets are the most basic independent units, occupying a small area and suitable for scattered placement, such as at small event sites or in remote areas for individual setup. Composite-structure mobile toilets include modular and trailer-mounted types. Modular ones are composed of multiple units joined together to form a 'toilet cluster', with a large capacity and the ability to have separate male and female toilet compartments, suitable for large events or crowded places. Trailer-mounted ones are equipped with wheel and axle assemblies and can be towed by vehicles, making them particularly suitable for touring events, such as music festivals held at different venues.
Regarding mobility methods, there are hoisting and handling mobile toilets and powered and trailer-mounted mobile toilets. Hoisting and handling mobile toilets require the use of cranes for movement and are suitable for fixed locations like construction sites, which usually have hoisting equipment and relatively fixed positions. Powered and trailer-mounted mobile toilets have wheels and are suitable for large events like music festivals; they can be easily moved by pulling, allowing for flexible adjustment according to the layout and needs of the event site.
In terms of sewage treatment methods, there are various types. Water-flush and non-water-flush suction mobile toilets: the water-flush type operates similarly to traditional public toilets and requires connection to water supply and drainage networks; the non-water-flush suction type treats excrement through suction. Recirculating water-flush mobile toilets are equipped with intermittent aerobic and anaerobic sewage treatment devices for fecal matter, with the addition of biological strains. They use biofilm technology to accelerate decomposition, and the treated water can be recirculated for flushing, saving water resources. Dry-packing mobile toilets have no water-flush devices; excrement is collected in biodegradable plastic bags, which are automatically replaced and collected centrally after use. Waterless biodegradable mobile toilets decompose excrement through microorganisms or chemical agents, further saving water resources. Foam-sealing mobile toilets use a bit of foam to cover odors, saving water and being environmentally friendly. Packing and collecting mobile toilets adopt replaceable collection bags and are suitable for wild environments with no infrastructure at all.
In terms of materials, the outer shells are mostly made of fiberglass-reinforced plastic, color-coated steel sheets, or polyethylene plastic, while the interiors use corrosion-resistant materials such as stainless steel and compact laminate. Fiberglass-reinforced plastic is lightweight, durable, and has a diverse range of shapes; color-coated steel sheets have a lower cost but slightly poorer thermal insulation; polyethylene plastic combines the advantages of light weight and weather resistance. Mobile toilets made of different materials are suitable for different scenarios. For example, plastic toilets are lightweight and inexpensive, suitable for temporary use at construction sites; color-coated steel toilets provide thermal and sound insulation and can have an attractive appearance, often seen in parks and streets; one-piece fiberglass-reinforced plastic toilets are sturdy and suitable for disaster relief and emergency rescue; tent-style ones are suitable for temporary events and are as easy to assemble and disassemble as setting up a tent.
