Steel and metal industry

Many compounds released during steel and metal manufacturing processes require treatment to protect our health, keep our air fresh-smelling, and preserve our natural environment.

To reduce steel and metal production pollution, environmental authorities are increasingly tightening their emission limits. Desotec’s modular, mobile, and sustainable filters can help your company comply with these regulations, thus ensuring your business continuity.

Several steel and metal production processes result in wastewater that requires purification. Process waters from the production of rolled aluminium or the galvanisation of steel may contain non-ionic surfactants and detergents, measured as COD, and even very hazardous polyaromatic hydrocarbons (PAH). Rinsing waters and rainwater run-off might contain similar compounds.

Desotec’s activated carbon filters reduce such compounds to extremely low levels, either as a standalone treatment or in combination with other technologies such as sand filters. After treatment, wastewater is fit for reuse or can be sent to wastewater treatment plants (WWTP), avoiding the need for expensive specialist disposal.

Emissions from annealing and cold mill processes are likely to contain VOCs, which must be removed for environmental and health reasons. Packaging lines and paint booths are also common sources of VOC emissions. PAH and benzene may also be found in the gaseous stream. These components have serious health and environmental effects. Also, cooling processes often release hydrogen sulfide (H₂S) and sulfur oxides (SOx).

Many of these compounds are strong-smelling. Odour removal is important on health and safety grounds and to maintain harmonious relations with the local community.

Desotec’s mobile activated carbon filters provide simple and sustainable answers to all these issues. They may be used as standalone treatments or in combination with other technologies as a pre-treatment or polishing step. As our set-ups are modular, they may be expanded or altered to meet changing production needs or increasingly stringent legislations. Filter exchange is swift and easy, minimising production downtime for your firm.