The SBR (Sequential Batch Reactor) system, a biological water treatment by activated sludge, is also a commonly used procedure when it is necessary to obtain high performance in water purification, also carrying a natural denitrification of them.

After a suitable pretreatment system, the water is treated in a single biological reactor designed and produced in reinforced concrete or GRP. The reactor is characterized by series of repeated sequences of treatment over time.

These phases are filling, biological reaction, decantation, sludge draining and purging. Thanks to this cyclic operation, the system has great flexibility that allows it to adapt to different treatment modalities and possible variations of debugging requirements.