Reduction of carbon content in waste-tire combustion ashes by bio-thermal treatment.
Application of bio-catalyst (NOE-7F) in thermal treatment can adequately dispose dark-black fly ashes from co-combustion of both waste tires and coal. After thermal treatment of fly ashes by adding 10% NOE-7F, the carbon contents reduced by 37.6% and the weight losses increased by 405%, compared with the fly ashes without mixing with NOE-7F. The combustion behaviors of wasted tires combustion fly ashes with NOE-7F were also investigated by both thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The results verify that NOE-7F has positive effects on the combustion of residual carbon and toxic polycyclic aromatic hydrocarbons (PAHs) enhance the energy release and reduce the toxicity during the process of thermal treatment. Furthermore, using NOE-7F to dispose high-carbon content fly ashes did improve the compressive strength of fly ashes and concrete mixtures. Therefore, NOE-7F is a promising additive which could decrease treatment cost of high-carbon content fly ashes and reduce the amount of survival toxic PAHs.
Chen
Chun-Chi
CC
Department of Environmental Engineering and Sustainable Environment Research Center, National Cheng Kung University, Tainan City, Taiwan.
Lee
Wen-Jhy
WJ
Shih
Shun-I
SI
Mou
Jin-Luh
JL
D001336:Automobiles; D002244:Carbon / Q000032:analysis*; D002384:Catalysis; D060729:Coal Ash; D004798:Enzymes / Q000737:chemistry*; D006358:Hot Temperature; D052638:Particulate Matter / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D013054:Spectrophotometry, Atomic
D060729:Coal Ash; D004798:Enzymes; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons; D002244:Carbon