D. Glindemann et al., TOXIC OXIDE DEPOSITS FROM THE COMBUSTION OF LANDFILL GAS AND BIOGAS, Environmental science and pollution research international, 3(2), 1996, pp. 75-77
Oxide deposits found in combustion systems of landfill gas fired power
stations contain relatively high concentrations of elements which for
m volatile species such as P, As, Sb and Sn. These deposits should be
handled with care because of their potential toxicity. By contrast, de
posits in biogas system engines were found to contain much lower level
s of such elements. The enrichment of these elements can be attributed
to a hypothetical multistage process. The elements form volatile spec
ies in the landfill body. They are selectively transported as part of
the landfill gas into the gas-burning devices. Inside the burners, the
y are immobilized as nonvolatile oxides.