Zero discharge, also known as Zero liquid discharge, is a sustainable process that seeks to recover water and valorize or minimize waste production.

The concept of zero discharge is based on the use of techniques and processes that make it possible to reuse all wastewater with a double objective:

The advantages of applying this philosophy, in relation to the conventional solution, are numerous, especially the following:

Apart from the points mentioned, a zero discharge system entails interesting advantages such as: reducing wastewater management costs, having to store less volume of dangerous polluting liquids in the industrial premises itself, reducing the number of transports of this waste, minimizing the risk of accidents and diesel consumption.

The field of application of this management system is as broad as the number of different activities that generate liquid effluents, with some small limitations.[1]​.

In short, these techniques make it possible to rationalize the management of liquid waste in the industry, which leads to an evident improvement for the environment and contributes to the reduction of companies' operating costs.