Sichuan Mobile Toilet Environmental Protection Standards

The environmental protection standards for mobile toilets in Sichuan are centered around national mandatory standards, supplemented by special requirements for container steel structure boxes, forming a comprehensive compliance system covering multiple dimensions such as anti-seepage and waterproofing, pollutant discharge, water conservation and environmental protection, fire prevention and electrical safety. Details are as follows:

1. Anti-Seepage and Waterproofing Requirements
The overall waterproof rating of the box must reach IP65. The floor must undergo multi-layer waterproofing treatment and pass a 48-hour closed water test to ensure no leakage. The sewage storage tank or septic tank must adopt anti-corrosion and anti-seepage processes, with a leakage rate of ≤0.1% per 24 hours, strictly preventing fecal pollution of soil and groundwater, in compliance with the HJ 2029-2013 standard. The floor waterproof coating must be ≥3 layers, and pipeline connections must use leak-proof sealing designs to ensure no leakage risk during long-term use.

2. Pollutant Discharge Standards

• Sewage Discharge: For those connected to municipal sewer networks, the GB 8978-1996 Grade III standard shall be implemented; for on-site reuse without sewer networks (such as for toilet flushing or landscaping), the GB 18918-2002 Grade I A standard must be met; zero-discharge fecal matter must satisfy the GB 7959-2012 harmless treatment requirements.
• Odor Control: The GB 14554-1993 Grade II standard shall be implemented, with an indoor ammonia concentration of ≤0.3mg/m³, reducing odor diffusion through biological filter beds or chemical deodorization technologies.

3. Water Conservation and Environmental Protection Technologies

• Water-Flush Type: The single flush volume for conventional models shall be ≤6L, and for water-saving models, ≤4L.
• Foam Sealing Type: The single water consumption shall be ≤0.1L, and the foaming agent must be biodegradable.
• Recirculating Water-Flush Type: The water recirculation rate shall be ≥80%, reducing water waste.
• Microbial Degradation Type: Achieving zero water flushing, with a fecal degradation rate of ≥90%, suitable for water-scarce or ecologically sensitive areas.

4. Fire Prevention and Electrical Safety
Enclosure materials must use Grade A non-combustible rock wool sandwich panels, and the use of flammable foam sandwich panels is prohibited; electrical wiring must be laid through metal conduits, and distribution boxes must be equipped with ≤30mA leakage protection devices; each box must be equipped with ≥2 4kg ABC dry powder fire extinguishers and independent smoke detectors to ensure controllable fire risks.

5. Structural and Durability Requirements
The main structure shall adopt a Q235B hot-rolled steel frame, with a main beam wall thickness of ≥2.75mm and a column wall thickness of ≥2.5mm, undergoing overall hot-dip galvanizing for anti-corrosion treatment; the enclosure material shall be 50-100mm thick color steel sandwich panels, with the core material being Grade A fire-resistant rock wool or glass wool. The design life for conventional models is 10-15 years, which can be extended to 20 years with proper maintenance, supporting repeated disassembly and assembly ≥8 times, in line with the concept of resource recycling.

6. Performance and Applicability
Wind resistance of Grade 8-10, earthquake resistance of Grade 6-8, two-story stacked models must be anchored with bolts and rigidly connected, equipped with dedicated stairs and guardrails; floor bearing capacity of ≥2.0kN/m², roof live load of ≥0.5kN/m², adapting to different usage scenarios. Environmental performance fully complies with standards such as GB/T 42568-2023 and HJ 2029-2013, ensuring that odor, sewage, and fecal harmless treatment indicators meet the standards.