Solidification

On November 2, 2011 the Zohor landfill started operation of a new technology for treatment of non-hazardous and hazardous waste (sludges, bottom ash, slag, boiler dust, etc.) with a capacity of 3600t/year.

The purpose of this technology equipment is the solidification and stabilization of waste by way of transforming the powdery and liquid waste into solid material, while creating physical barriers and chemical bonds preventing the waste contaminants from leaking out into the environment.

The solidification technology is used to process waste in paste or mash-like state of matter higher in water as well as waste with hydraulic conductivity. The solidification agent is a fine-ground matter, in some cases also in liquid or plastic form. The solidification technology is also used in processing waste contaminated with petroleum substances or heavy metals. The method of solidification (encapsulation) is applied in waste with doubtful consistency.

Since the solidification line is located within the landfill premises, the product of solidification is used as an overlay material to cover light waste components as well as material for building the landfill body.    

By means of inorganic or organic matrix, the solidification technology is used to solidify liquid or solid waste. The bonding agents used in the process include materials (also waste), which either generate a chemical reaction with the solidified material or covers its particles without any chemical reactions. The active binding agent used in this process is lime (hydraulic binding agent), supplemented by other additives – fly ash, product of desulphurising (REA product) and cement. The chemical-physical bonding between solidification agents and pollutants results in decreasing the mobility of pollutants and the possibility of these pollutants being washed out to the surrounding environment, for instance through rain water.