Waste water coming from industrial installations and from human settlements is continually on the increase due to the growing needs of an industrialized society. This great mass of water is often full of pollutants which produce a progressively increasing unbalance in our environment. With the proper treatment of waste water it is possible to obtain clean water which poses no threat to the environment and which can often be re-cycled. Some examples of industrial plants constructed by Mosaico Tecnologies are: - Systems for screening and riddling; - Systems for oil separation: - Flotation system; - Biological plants in general, aerobic and anaerobic type; - Biological plants with MBBR; - Biological plants with MBR membranes; - Chemical precipitation plants in general; - Evaporation vacuum heat plants - Sludge dehydration plants