How to Use Mobile Toilets in Tianjin

The use of mobile toilets in Tianjin should be tailored to their types and specific scenarios, with operations divided into four parts: basic functional usage, scenario-specific adaptation, rental procedures, and special type operations.

I. Basic Functional Usage Guidelines

The core functions of mobile toilets include flushing, ventilation, and barrier-free design.

• Flushing System: Water-flush toilets require connection to an external water source, triggering water-saving flushes via foot pedals or buttons. Dry toilets rely on chemical agents (such as decomposing enzyme preparations) or biodegradable materials to treat waste, necessitating regular addition of agents. Recirculating water flush systems achieve water reuse through filtration and ultraviolet disinfection, suitable for water-scarce scenarios.
• Ventilation System: Negative pressure design is employed, with air entering through bottom inlets and exiting through top vents, creating a unidirectional airflow to prevent odor diffusion. High-end models are equipped with breathing valves that automatically adjust the air pressure inside the waste tank to prevent backflow of foul air into the toilet compartment.
• Barrier-Free Facilities: Some toilets feature ramps, handrails, and low-level washbasins. When used by individuals with mobility impairments, it is essential to ensure that the ramp gradient is ≤1:12 and the handrail diameter is between 32-38mm, in compliance with barrier-free design standards.

II. Scenario-Specific Usage Recommendations

• Large Events/Scenic Spots: Prioritize modular mobile toilets, which can be assembled into 4-8 toilet compartments through modular connections, and are equipped with independent washbasins, urinals, and hand dryers. For example, during the peak tourist season in Tianjin's Wudadao scenic area, such toilets can serve over 2,000 people per day.
• Construction Sites/Temporary Camps: Opt for steel-structured toilets with 50mm-thick rock wool insulation layers inside and non-slip floors coated with waterproof paint, adaptable to temperatures ranging from -20℃ to 50℃. After using such toilets at a construction site in Tianjin's Binhai New Area, equipment failure rates decreased by 60%.
• Low-Temperature/Windy Regions: In winter or coastal areas of Tianjin, choose toilets equipped with electric tracing anti-freeze systems to ensure that water tanks and pipes remain at temperatures ≥5℃. Additionally, heavy-duty chassis and ground anchor fixation devices should be used to withstand wind forces up to Level 8.

III. Rental Service Usage Procedures

• Demand Matching: Determine the toilet type based on the number of users (e.g., two toilet compartments for an average of 500 people per day), duration (dry toilets recommended for short-term events, recirculating water toilets for long-term construction sites), and site conditions (e.g., ground bearing capacity ≥300kg/m², location of water and electricity connections).
• Transportation and Installation: The rental company is responsible for transporting the toilets to the site. Water-flush toilets require connection to DN25 water inlets and DN50 drainage pipes, while dry toilets only need a level ground. After installation, test the flushing pressure (0.15-0.3MPa) and ventilation volume (≥80m³/h).
• Maintenance and Management: During use, clean the waste tank daily (water-flush toilets with a capacity ≥200L, dry toilets requiring weekly replacement of degradation bags) and wipe surfaces with a chlorine-based disinfectant (effective chlorine 500mg/L). Waste should be handled by professional environmental protection companies in compliance with the "Tianjin Municipal Domestic Waste Management Regulations."

IV. Special Operations for Trailer-Mounted Mobile Toilets

• Traction Matching: The chassis must comply with the GB/T 15089-2001 standard. The towing vehicle should be equipped with a 13-pin electronic control interface and an inertia braking system. Electric brakes must be installed if the total mass exceeds 3.5 tons.
• Deployment Flexibility: After towing to the site, stabilize the toilet using hydraulic outriggers with a horizontal error ≤5mm. Suitable for scenarios requiring rapid relocation, such as marathon aid stations, with a single deployment time ≤30 minutes.
• Chemical Treatment Agent Selection: For long-term rentals, decomposing agents (such as a starch enzyme + cellulose enzyme complex) are recommended, capable of liquefying over 90% of solid waste. For short-term events, fragrance agents can be used to mask odors, but they must be replenished every 2 hours.