Mobile Toilet Sedimentation Tank

The core function of the mobile toilet sedimentation tank is to achieve environmentally friendly treatment and discharge of excreta through a three-stage sedimentation principle. Its technical process combines physical sedimentation with biological degradation to ensure that wastewater meets discharge standards or is reused. Here are the specific principles and processes:

Primary Sedimentation (Primary Sedimentation Tank): Physical Separation of Large Particles
Excreta first enters the primary sedimentation tank, where gravity causes large solid particles (such as feces and tissue paper) to quickly settle to the bottom, forming a sludge layer. During this stage, larger debris (such as plastics and fibers) is intercepted by a grating to prevent pipe blockages. The primary sedimentation tank can remove approximately 60%-70% of suspended solids, significantly reducing the load for subsequent treatment. For example, undegraded tissue paper or food residues are retained at this stage to prevent them from entering the biological treatment process and affecting microbial activity.

Secondary Sedimentation (Biological Treatment Tank): Microbial Degradation of Organic Matter
The wastewater from the primary sedimentation tank flows into the biological treatment tank, where specific bacterial strains (such as aerobic and anaerobic bacteria) are added for decomposition. Aerobic bacteria convert organic matter like urea and fats into carbon dioxide, water, and inorganic salts under oxygen-rich conditions; anaerobic bacteria decompose complex organic matter in oxygen-free environments, producing gases such as methane. This stage can degrade approximately 80%-90% of organic pollutants while reducing odors through microbial metabolism. For example, urea in urine is decomposed into ammonia and carbon dioxide, while proteins in feces are converted into amino acids and inorganic salts.

Tertiary Sedimentation (Final Sedimentation Tank/Disinfection Tank): Chemical Flocculation and Disinfection
The wastewater from biological treatment enters the final sedimentation tank, where flocculants (such as polyaluminum chloride) are added to aggregate residual colloidal particles into clumps, accelerating sedimentation. The clear water on top is disinfected (using methods such as ultraviolet light or chlorine tablets) to meet discharge standards and can be directly discharged into municipal sewers or used for irrigation; the bottom sludge is periodically transported to a professional treatment station for harmless treatment through high-temperature composting or chemical processing. For example, flocculants adsorb tiny particles in the wastewater, forming larger flocs that settle, while the disinfection step kills pathogenic microorganisms like E. coli to ensure water safety.

Sedimentation Tank Brands and Application Scenarios
Mainstream brands in the market include Changheng Technology, Kean Instrument, and Zhaohui, among others. Their products are all designed based on the three-stage sedimentation principle but may differ in materials (such as stainless steel or PE), capacity (ranging from 200L to 1000L), and automation level (such as automatic dosing or remote monitoring). Mobile toilet sedimentation tanks are widely used in scenic spots, construction sites, temporary events, and other scenarios. Their modular design enables rapid deployment and flexible movement, effectively addressing the challenges of difficult sewage discharge and heavy pollution associated with traditional toilets.