Odstranění těžkých kovů z popílku tuhých komunálních odpadů

Abstract

Fly ash from a municipal solid waste (MSW) incinerator is categorized as a hazardous material. Fly ash contains high amounts of heavy metals which can contaminate the environment. For removal of heavy metals (namely Cd, Pb, Cu, Zn, Ni and Cr), MSW fly ash was treated thermally in co-current batch and continuous mode in a lab-scale indirectly heated rotary reactor at temperature range 950 – 1100°C. Prior to that, fly ash was mixed or pelletized with different additives such as chlorinating agents (mainly calcium chloride), sand or reducing agent as coke. Heavy metal compounds evaporated in different ratios while the maximal removal of heavy metals was required. Influence of different additives in different amounts, influence of temperature or different size fractions of fly ash was studied. MSW fly ash originated from the waste-to-energy plant Fernwärme Wien / Spittelau in Vienna, Austria.