These are special monoblock units designed for deep treatment of domestic wastewater with a volume ranging from 2 to 12 m3 per day. They utilize a unique type of reactor made of polypropylene, which is housed in a circular reinforced concrete well. These units also feature a block that allows for dewatering excess activated sludge to reduce its volume. This feature enables effective wastewater treatment and efficient management of sludge treatment, making the process effective and economical.