New Mobile Toilet Solution
The new mobile toilet solution covers six core areas: structural functionality, spatial adaptability, resource management, waste treatment, operational deployment, and construction site applications.
1. Structural and Functional Design
Adopting a modular design concept, the foundational framework primarily uses lightweight, high-strength materials such as aluminum alloy or fiberglass-reinforced plastic, facilitating easy transportation and rapid assembly. The internal system integrates waste collection devices, water-recycling flushing units, and ventilation equipment, with waste disposal options including self-contained storage tanks or small-scale biological treatment units for independent operation. For example, Beijing Sanitation's mobile restrooms utilize a split-box structure with walls made of high-density polyethylene or fiberglass-reinforced plastic, offering corrosion resistance and lightweight properties. Over 85% of individual modules are prefabricated in factories, requiring only pipeline connections and foundation securing on-site, significantly shortening deployment cycles.
2. Spatial Utilization and Scenario Adaptation
Through optimized design, the area of a single toilet cubicle is compressed to under 1.2 square meters while retaining space for wheelchair rotation. Wall-mounted sinks, foldable handrails, and sloped floors enhance spatial efficiency; deployment density can be dynamically adjusted based on foot traffic, such as using a “1 management unit + 10 toilet cubicle units” combination for large events. After the event, modules can be quickly relocated to other areas, preventing resource idleness.
3. Energy and Water Resource Management
An independent power supply system combines solar photovoltaic panels with battery packs. A single standard panel generates approximately 0.5 kilowatt-hours per day, meeting the demands of lighting, exhaust fans, and sensor-activated flush valves. Water resource management employs a dual-cycle approach: gray water from sinks is filtered for floor cleaning, while toilet flushing water reduces replacement frequency through biological degradants. Some models incorporate rainwater collection systems to further reduce water consumption.
4. Waste Treatment and Environmental Standards
Mainstream solutions include vacuum collection and microbial degradation. Vacuum collection uses negative-pressure pipelines to suction waste into sealed tanks, requiring only 0.5 liters of water per flush and achieving over 90% water savings. Microbial degradation employs pre-buried inoculum fillers and aeration systems to decompose organic matter, producing solid fertilizer and carbon dioxide as end products, eliminating the need for regular pumping. Both solutions must comply with emission limits specified in the Urban Environmental Sanitation Facility Planning Standards.
5. Operational Logic and Deployment Model
Based on data analysis predicting peak foot traffic (e.g., large events, tourism high seasons, or temporary construction zones), mobile toilets are pre-deployed to demand points and relocated or recovered for maintenance after tasks. This mobile model avoids resource misallocation caused by the long construction cycles and fixed locations of permanent public toilets.
6. Construction Site Application Plan
Construction sites require systematic planning for location selection, structure, foundation, installation, and environmental measures. Locations should avoid prevailing summer winds and be situated 30–50 meters from dormitories and canteens. Foundation compaction must exceed 90%, with a 10–15 cm C20 concrete pad poured. The main structure recommends an integrated steel frame paired with HDPE wall panels or color-steel sandwich panels to ensure stability and durability.
