WTC – Waste Treatment Center
Liquid Waste Incinerator
The Liquid Waste Incinerator, Sulzer technology, is able and licensed to ensure the thermal destruction of 10,000 t/year organochlorine hazardous waste, having a GCV (gross calorific value) of 3,322 Kcal/Kg. Its combustion temperature goes up to 1,350 ºC and residence time of more than 3 seconds, assures the destruction and removal efficiency DRE ≥ 99,9999 % and combustion efficiency of ≥ 99,99%.
The burning process is held in two stages. The first one is where it occurs most of the combustion and the second complements the reaction. The generated combustion gases are cooled, washed and neutralized enabling the plant to meet the liquid effluents and air emissions legal standards, which are monitored continuously with instruments and analyzers on the line.
The Solid Residue Incinerator of Andersen 2000 Inc. – USA technology is able and licensed to ensure the thermal destruction of 5,000 t/year of organochlorine hazardous solid or paste waste, having a GCV (gross calorific value) of 2,094 Kcal/Kg.
It has two combustion chambers. One is a rotational barrel in which the waste is disposed by a conveyor belt and the other is an afterburner with combustion temperatures up to 1,100 ºC and residence time of more than 4 seconds, assuring the destruction and removal efficiency DRE ≥ 99,9999 % and combustion efficiency of ≥ 99,99%. The generated combustion gases are cooled, washed and neutralized enabling the plant to meet the liquid effluents and air emissions legal standards, which are monitored continuously with instruments and analyzers on the line.
The ashes are generated in this process fitting each incinerated residue physical-chemical composition. The ashes are disposed in licensed sanitary landfills, through the evidence of its class, which can be II A or II B.
Burning tests are frequently held in order to prove the capacity and efficiency of the Liquid and Solid Incinerators as well as to prove the quality of the liquid and air emissions, following the established standards from CONAMA n° 316/02 Resolution.
Solid Residue Incinerator
Biphenyl Polychloride (PCBs) are chlorinated aromatic components which family consists of approximately 709 different components. The commercial products fabricated with PCBs base are composed of insulating oils used in transformers. Capacitors and other electric equipment. The mixture of components in which prevail from trichloride-biphenyls up to heptachloride-biphenyls. Each Biphenyl Polychloride has a number of isomers which are going to vary depending on the specific PCB. Commercially they are known as Ascarel or Askarel and other names, such as Aroclor, Pyralene, Chlorophen, Inerteen, Asbetol and Kneclor;
Brazil has committed, in the Stockholm Convention in February 24th, 2004 by the nº 5.472 Decree from June 20th, 2005, of not using more PCB until 2025 and to completely destroy it until 2028. Additionally, the production of PCBs is prohibited since 1981.
Cetrel’s incinerators achieve an efficiency of 99.9999% of PCBs destruction, in attendance with its Operational License INEMA 10.974 Ordinance, which is valid until 2020.
In association with cement companies since 2002, Cetrel was a pioneer in the development and licensing of hazardous and non-hazardous waste co-processing in clinker ovens.
Co-processing provides better use of thermal and material residue with no ash generation. All the residue is thermally exploited and is added to the clinker crystals. In this way, the co-processing solution reduces fossil fuels burn and reduces the non-renewable natural resource consumption, providing sustainable disposal of the industrial waste.
Technically qualified and with adequate assets in its blending unit and located in Via Atlântica, Cetrel has present capacity of qualifying and treating more than 60,000 t/year industrial waste. Such as: oily lees, polluted soil and various contaminated materials. Meeting the necessary specifications established by the cement companies and meeting the present environmental control regulations.
The class II solid residue final disposal process uses industrial landfill sites, composed of compacted clay liners system, high density polyethylene blankets (HDPB) and an internal drainage system (slurry removal). This disposition ensures appropriate environmental security and strict compliance with legal requirements. Cetrel’s landfills are licensed for disposal of Class II A/B and some kinds of Class I residue, which are rated as hazardous. All the generated slurry in the company’s landfills is directed to the Effluent Treatment Plant (ETP), which ensures additional safety to the system.
In 2017, Cetrel S/A has gone back to operate the Thermal Treatment and Final Disposition of Residue plants, located in Camaçari’s Industrial Hub in Rua Oxigênio and Via Atlântica, respectively. Using in-depth environmental engineering Cetrel retakes its leading position in the Sustainable solution Market for treatment and final destination of industrial waste.
Vertical Industrial Landfills
Cetrel S/A, uses the most advanced technology for industrial solid waste disposition: the Vertical Industrial Landfills, which are built in vertical layers starting from floor level. This way it reduces the possibility of soil and water table contamination. The construction of vertical landfills uses the region own topography, giving them a layout of small hills integrated in the area where they are. The Picture below show the technical characteristics of the vertical landfills from Cetrel S/A. It can be observed that the company follows the technology state of art, using as an excellence reference the company GSB (AI), which holds the best technology for waste disposition in Europe.
The class II non-hazardous solid residue final disposal process uses industrial landfill sites, composed of compacted clay liners system, high density polyethylene blankets (HDPB) and an internal drainage system (slurry removal). This disposition ensures appropriate environmental security and strict compliance with legal requirements. Cetrel’s landfills are licensed for disposal of Class II A/B and asbestos tiles. All the generated leachate in the landfills are channeled through ducts.