It is a pre-process for inorganic or organic waste water. The condition of the pre-process determines the efficiency of the main process and it can even guarantee smooth operation and high durability of the system.

This method utilizes the standard and long-term activation sludge methods, the contact oxidation method and the continuous batch reaction method to process the organic material that is not eliminated by a chemical process.

In addition to the biological processing, the chemical and electrical processes are used to process nitrogen and phosphorous.

The waste water recycling system that is currently recommended is a necessary system to save the scarce water resource and prevent environmental pollution.