Production of Mobile Environmental Toilets in Gansu
The production of mobile environmental toilets in Gansu requires the integration of material properties, modular design, environmental protection technologies, and regional adaptability improvements, achieving efficient production and rapid assembly through standardized processes.
Material Selection and Structural Optimization
Given the large temperature variations between day and night and the alkaline soil in Gansu, color-coated steel sheets that are UV-resistant and alkali-resistant should be selected as the main structural material. The surface layer features an aluminum-zinc coating composed of polyester or fluorocarbon resins, with the base material and coating bonded through chemical bonds and physical anchoring to ensure corrosion resistance. The steel sheet thickness ranges from 0.4 to 0.6 millimeters, with polyurethane foam filling the interior to form a sandwich structure, enhancing thermal insulation. The steel structural framework employs carbon dioxide arc welding, with weld tensile strength exceeding 85% of the base material, strengthening overall stability.
Modular Design and Rapid Assembly
Color-coated steel sheets are processed into three major modules—wall panels, roof panels, and floor panels—using CNC pressing equipment. The joints utilize labyrinth-style slots and EPDM rubber seals, achieving an airtightness level that meets the third-grade standard for building envelopes. The framework system connects via high-precision punching and bolts, with module units undergoing pre-embedded piping and standardized interface installation before leaving the factory. On-site assembly only requires alignment and connection, significantly reducing installation time. Some models feature foldable side panels to reduce footprint during non-use and lower logistics costs.
Environmental Protection System Integration and Resource Recycling
The interior is equipped with water-saving flushing devices, consuming less than 1.8 liters per flush, connected to an 80-liter freeze-resistant septic tank via siphon-type sewage pipes. The septic tank is treated with composite bacterial agents, achieving a 70% decomposition rate of organic waste within 72 hours, with the output meeting water quality standards after secondary treatment. Monocrystalline silicon photovoltaic panels are installed on the roof, generating an average of 2.1 kilowatt-hours per day to meet lighting and ventilation energy needs; rainwater collection devices, after three-stage filtration, are used for flushing, reducing external water supply demand by 40%. Excreta treatment employs a biological-chemical synergistic process, with the final output meeting the NY525 standard for organic fertilizers.
Regional Adaptability Improvements
The structure is connected to a concrete foundation via anchor bolts, with wind load capacity designed according to a 50-year return period wind pressure of 0.45 kN/㎡ in Gansu. The piping system uses electric tracing insulation layers to maintain fluid flow at temperatures as low as -25°C. The exterior wall surface features a sand-textured coating process, extending weather resistance lifespan to 1.8 times that of ordinary coatings. During transportation, container lifting holes are set at the corners of the box, with internal components shock-proof packaged, and the overall height complying with road height restrictions to ensure cross-regional transportation feasibility.
