| dc.description.abstract | Air pollutants generated from municipal solid waste incineration (MSWI) process may include particulate matter, acid gases (such as NOx, SOx, HCl), heavy metals (such as Pb, Cd, Hg) and organic matter (such as dioxin and furan).
Particles generated are generally collected by cyclone, EP, or FF, while nitrogen oxides can be treated with either selective noncatalytic reduction (SNCR) or selective catalytic reduction (SCR). On the other hand, acid gases including sulfur oxides and hydrogen chloride are effectively removed by either wet scrubbers, semi-dry scrubbers or dry scrubbers with the addition of alkaline agent. Dioxin and furan can be efficiently removed by injecting powder activated carbon followed by the baghouse or be destroyed by SCR.
This study selected four municipal waste incinerators equipped with different air pollution control devices (APCDs) for further investigation and comparison regarding the efficiencies and cost of removing acid gases from the processes. For the purpose of comparison, the costs of treating one ton of waste including chemicals, electricity, water usage and pollutant discharge fee are analyzed.
The results indicate that incinerator C is of the lowest cost while the incinerator B has the highest cost for treating the air pollutants. Interestingly, incinerator B is also of the lowest air pollutant emissions compared to other incinerators.
| en_US |