Static bed scrubber Static bed scrubbers are washing towers with high efficiency and effectiveness in abating soluble pollutants in recirculation liquid, normally water. At times the air coming from production can also be contaminated with halogenated compounds (containing fluoride, chlorine, bromine or iodine), or containing sulphur, phosphorus or dust (if present in low quantities). Description of the plant The static bed scrubber consists of a bed made in random, structured or plate material capable of transferring the pollutant from the air to the circulating liquid. This liquid is pumped to the top of the tower or roughly sprayed on the bed itself. Shortly before the treated effluent exits the tower, a demister is applied to capture the liquid droplets inside the machine. Floating bed scrubber The floating bed scrubber is a vertical wet abatement system where the speed applied to the effluent by the shape of the system makes spheres float inside the machine. The presence of these spheres effectively abates an effluent mix of inorganic, organic and dust pollutants. The fluctuations of the spheres allows them to clean themselves so that this machine can be applied in environmentally friendly sectors such as composting or environmental exhaust treatment where there are various types of dust and pollutants. Description of the plant The machine is called a floating scrubber due to the characteristic of having a bed of plastic material inside, typically spheres, which fluctuate while the effluent passes through. The presence of the plastic material increases the contact surface between the effluent and the liquid, while fluctuation allows the material to be self-cleaned thanks to friction of the spheres during operation. Obviously, a pump draws liquid from the storage tank which is sent to the top of the column and sprayed on the floating bed. A demister is applied downstream of the bed to reduce entrainment of the water droplets outside of the scrubber. Venturi Scrubber The Venturi scrubber exploits the Venturi effect which is intentionally created inside its throat. The water to be treated is introduced in parallel flow with the aqueous solution. Thanks to the close contact that the Venturi throat creates and therefore also to the turbulence of the streams thus created, the pollutants are separated from the effluents and encapsulated in the aqueous solution. These systems are normally used for pollutants consisting of dust or oil. Description of the plant The Venturi scrubber is built by applying an upright Venturi pipe. Effluent and reagent travel in the large part of the pipe in parallel flow and come into close contact in the tight passage section, namely the throat, inside of which the mass is transferred from the effluent to the circulating liquid. In the next enlarged section of the pipe, the streams slow down and the liquid droplets separate from the effluent which can be sent outside of the system after passing through the specific demister.