DEVELOPMENTS OF CERAFIL® FILTER ELEMENTS IN ENVIRONMENTAL EMISSION TECHNOLOGY FOR ALUMINA REFINERIES

Elliott, G.

Madison Filter Ltd is introducing two new Cerafil® ceramic filter element products. One is formulated with bio-soluble fibrous components that enhance the product performance in the reduction of particulate emissions from process gases. The other incorporates various catalysts (patent pending) within the elements that address issues relating to gaseous pollutants such as volatile organic compounds and nitrous oxides.

This paper reviews these developments and the use of Cerafil® filter elements in environmental emission technology.

These new Cerafil® elements now provide the following major benefits: - 

  • High Efficiency Particulate Arrestor (HEPA) rated filtration efficiency – 99.9%.
  • Superior Occupational Health & Safety properties – complying with the European Union’s Directive on exoneration criteria.
  • The removal of Volatile Organic Compounds (VOC’s), during the particulate filtration process.

Cerafil® Green is the new bio-soluble filter element and is currently being used in the alumina industry for liquor burning dust collection. It has been achieving extremely low emission levels with measured emissions below 1mg per cubic meter.

The most exciting development product provides a step change in air pollution control technology. The new Cerafil® TopKat filter element incorporates a catalyst and is now able to remove particulates and treat gaseous pollutants in a single step. The use of this product for dust and VOC treatment eliminates the need for complicated and expensive trains of pollution control equipment. The catalysts can be specially formulated to eliminate VOC’s, other organic compounds and Nitrogen Oxides (NOx). The potential to remove odorous VOC’s can solve a problem that exists today in the alumina industry.

Laboratory and field performance data is included and discussed in this document.