A market leader in air pollution control solutions with sodium based sorbents

SOLVAir® Solutions is a wide range of sodium bicarbonate products, services, technologies and treatment systems for air emissions control and associated waste management that meet the demand of industrial activities.

SOLVAir® expertise cumulated on more than a hundred of cases which can support customers to solve air emission control challenges by designing the most adequate solutions.
Our processes are fully compatible with the most efficient nitrogen oxides (NOx) mitigation technologies.

We offer and continuously develop competitive and sustainable environmental solutions used for air emissions control and associated waste, through a range of products, services, technologies and treatment systems.    

EEW Energie from Waste Delfzijl B.V

SOLVAir® solutions benefits

  • Allows the plant to adapt to stringent emission limit values
  • Ideal for discret flue gas treatment
  • Does not generate effluents
  • Allows to minimize the flue gas cleaning residuals
  • Runs with Low CAPEX / OPEX
  • Enables to maximize the energy efficiency of the plants: high mitigation levels for SOx, HF, HCl up to more than 99%
  • Works with a safe reagent: non toxic, non hazardous reagent, risk-free manipulation and storage supporting customers plant safety 



The SOLVAir® RSC* Recycling Solution reduces the amount of residues to be landfilled by a factor of 10 or more by extracting a salted solution and replacing the original raw materials of chemical processes.
* Residual Sodium Chemicals  


In air emission control with double filtration of waste to energy plants, the RSC collected at the second filter consist mainly of sodium chloride, sodium sulfate and sodium carbonate. These products are contaminated by impurities like: fly ashes, activated carbon, heavy metals, micro pollutants, etc.


Residuals produced by the air pollution control processes are considered as harmful substances.

The SOLVAir® Solution: recycling process for sodic residue of flue gas cleaning

SOLVAY has developed and patented an original technology which allows the production of purified sodium brine suitable to replace the natural brine used in soda ash production plants. Resolest® in France and Solval® in Italy, have successfully industrialized this technology since 1998.

The RSCs are dissolved in water at a controlled PH, with additives, and filtered. The insoluble part, containing fly ashes, activated carbon and heavy metals hydroxides, is removed as a filter cake.

The raw clear brine passes trough a column of activated carbon in order to eliminate residual organic matter. The last traces of heavy metals are removed by treatment using ion exchange resins. The purified brine is then reused in soda ash manufacturing.

The process avoids the production of liquid effluents; all the washing water and resin regeneration fluids are reused in the process. The filter cake (representing only 2 to 4 kg/t final waste) is landfilled in an authorized disposal.