Huairou Simple Mobile Toilet
The simple mobile toilet in Huairou District is a sanitary facility with mobility, modular design, and adaptability to various environments. The following is an introduction from aspects such as structure, function, environmental adaptability, maintenance, energy consumption, leasing, and treatment systems:
Structure and Function: The main body adopts modular assembly. The walls are mostly made of composite materials or metal panels with strong weather resistance. The bottom is equipped with a reinforced load-bearing wheel and axle system for easy movement. The sewage storage system is independent of the fixed sewage discharge pipes. The fecal collection device includes anti-leakage storage tanks and liquid level monitoring sensors. The storage tank volume ranges from 0.5 to 3 cubic meters. Some models integrate vacuum collection technology, requiring only 0.3 to 0.5 liters of water per flush.
Environmental Adaptability: The thickness of the insulation layer is determined based on the local average annual temperature difference. The ventilation system adopts a dual-channel design. Anti-freezing models have self-limiting temperature electric heating tapes laid inside the pipes. The wind-resistant design takes into account the local wind load coefficient, and the box body is fixed to the ground through an anchor system. In mountainous areas, the stability coefficient of the slope needs to be calculated. When deployed in forest areas, attention should be paid to setting fire prevention distances. In waterfront areas, the moisture-proof level needs to be improved. The equipment spacing follows aerodynamic models, and light-sensitive lighting systems need to be added for nighttime use sites.
Cleaning and Maintenance: This includes daily tasks such as checking the integrity of the sealing rings and replenishing biological enzyme preparations. Weekly tasks involve testing the concentration of the fecal decomposition agent, and monthly tasks require calibrating the values of the ammonia gas sensors.
Energy Consumption Management: A hierarchical control strategy is adopted. The first-level energy consumption comes from ventilation and lighting equipment, usually equipped with a 12V DC system and solar panels. The second-level energy consumption involves winter heating devices, which use phase-change energy storage materials to reduce electricity consumption. The third-level energy consumption belongs to special function modules. The built-in energy consumption monitoring module in the system can display the power consumption of each unit in real-time.
Leasing Process: The technical assessment includes an on-site inspection. Professionals will measure the site slope, conduct soil permeability tests, investigate the surrounding vegetation, and estimate the number of users. There is a dynamic correspondence between the leasing period and equipment configuration. Short-term leasing focuses on rapid deployment capabilities, usually selecting lightweight folding models. Medium- and long-term leasing takes into account durability indicators. Ultra-long-term deployment may involve system upgrades.
Treatment Systems: There are two technical paths: circulating water flushing type and waterless flushing type. The circulating water flushing type filters and disinfects the flushing water through a miniaturized water treatment unit for reuse. The waterless flushing type uses biological degradation or chemical coagulation to treat excreta. However, simple mobile toilets also have limitations such as compact internal space and limited sewage storage capacity.
