How to Store Wastewater in Mobile Toilets

The methods for storing wastewater in mobile toilets vary depending on their sewage treatment types, mainly falling into the following categories:

1. Direct Discharge Type
   Direct discharge mobile toilets are connected directly to the municipal sewage network through pipes, and wastewater is transported through these pipes to the urban sewage treatment system for centralized treatment. These toilets do not have their own storage devices and rely on external pipe networks for wastewater discharge, making them suitable for fixed locations with municipal sewage facilities. Their main advantage is that there is no need for manual cleaning of storage containers, but they are limited by the coverage of the pipe network and have lower flexibility.

2. Flush Type (with Sewage Tank)
   Flush-type mobile toilets are equipped with a sealed sewage collection tank at the bottom. After use, a small amount of water is used to flush waste into the tank for storage. The capacity of the sewage tank is usually between 50 and 200 liters. When the storage capacity reaches its limit, it needs to be cleaned by a professional sewage suction vehicle. These toilets are suitable for short-term events or temporary locations, but they require regular maintenance to prevent odor leakage and have relatively high cleaning costs.

3. Vacuum Collection Type
   Vacuum collection mobile toilets use a vacuum pump to generate negative pressure, drawing sewage and feces into a storage tank at high speed. The storage tank is usually made of high-strength plastic or stainless steel and has a capacity of over 300 liters, meeting the needs of continuous use by multiple people. This technology reduces water consumption through rapid suction (only 0.5-1 liters of water per flush) and effectively prevents odor diffusion, making it suitable for water-scarce areas or high-density population scenarios.

4. Mobile Sewage Tank Type
   These toilets are equipped with a detachable sewage tank at the bottom. The tank body is mostly made of polyethylene (PE), which is corrosion-resistant, lightweight, and easy to handle. Wastewater flows directly into the tank for storage. When the capacity reaches 80%, the user needs to manually remove the sewage tank and empty it at a designated location. Their advantages include simple operation and low maintenance costs, but they require frequent monitoring of the tank status to avoid overflow risks.

5. Chemical Treatment Type
   Chemical treatment mobile toilets use biodegradable agents or disinfectants to break down organic matter in sewage into harmless substances. The treated liquid can be discharged into the ordinary sewage system or designated collection points. Some models are equipped with temporary containers (such as 50-liter plastic buckets) to store partially treated wastewater. These toilets are suitable for remote areas without sewage pipe networks, but they require regular replenishment of chemical agents, and the treatment effect is greatly affected by ambient temperature.