Inspection of Mobile Environmental Toilets in Langfang

The inspection of mobile environmental toilets in Langfang should focus on core indicators such as technical conditions, materials, sewage systems, and maintenance systems, in accordance with the standard 'Technical Conditions for Mobile Toilets' (CJ/T 378). The following key aspects should be inspected:

1. Material Inspection The body material must meet requirements for corrosion resistance and ease of cleaning, with high-density polyethylene (HDPE) or fiberglass preferred, and materials prone to rust, such as carbon steel, avoided. During inspection, material reports should be verified to confirm acid and alkali resistance and surface smoothness, preventing leakage or cleaning dead zones after long-term use.

2. Sewage System Inspection

• Direct Discharge Type: Verify whether on-site conditions allow for connection to a septic tank or sewage pipeline, and check the tightness of pipeline connections to prevent sewage overflow.
• Collection Type: Focus on inspecting the capacity (usually 200-500 liters) and tightness of the sewage storage tank, verifying no leakage through pressure testing. If biological degradation technology is used, inspect the activity and decomposition efficiency of microbial communities; for foam sealing or vacuum suction systems, test the stability of foam generation or negative pressure suction capacity.

3. Maintenance System Inspection Simulate common fault scenarios to inspect the response speed of functions such as water pump blockage, seal aging, and sewage tank level alarms. For example, test the water pump's self-cleaning ability by blocking the water inlet or verify remote notification functions by manually triggering level alarms. Additionally, require the rental company to provide a commitment to fault response time (e.g., arrival within 2 hours) and a list of spare parts inventory to ensure maintenance efficiency.

4. Ventilation System Inspection Verify the effective ventilation area indicated on the product (not less than 0.2 square meters) and check whether the number of top turbine vents or side windows meets design requirements. Smoke testing can be used to verify air circulation efficiency, ensuring timely removal of odors from the toilet and preventing bacterial growth.

5. Smart Management System Inspection If the toilet is equipped with a smart management platform, inspect the accuracy of IoT modules and sensors. For example, simulate toilet occupancy to test the synchronization speed of remote monitoring data or manually consume consumables to verify low-stock alarm functions. Some models support air quality monitoring, and the display accuracy of indicators such as PM2.5 and ammonia should be verified.

6. Extreme Environment Adaptability Inspection The product must pass environmental tests from -30°C to 50°C to inspect tightness and structural stability. For example, inspect water tank antifreeze measures in low-temperature environments and verify the cooling capacity of the ventilation system in high-temperature environments. Factories typically ensure quality through tightness tests (e.g., pressurizing to 0.05 MPa for 30 minutes without leakage) and seismic simulations (e.g., simulating 8-magnitude earthquake vibrations).

7. Environmental Indicator Inspection The water-saving rate must reach over 90%. Some models use a 'zero-discharge' system, and the efficiency of converting fecal waste into reclaimed water and water quality (e.g., COD and ammonia content) should be inspected. During inspection, request the rental company to provide third-party water-saving certification reports and verify whether the flushing water consumption complies with standards.

Inspection Recommendations: Require the rental company or manufacturer to provide a complete third-party inspection report, verify the transparency of technical parameters, fault response mechanisms, and clarity of cost structures to avoid disputes during subsequent use.