Removal characteristics of PCDDs/Fs from municipal solid waste incinerator by dual bag filter (DBF) system

Inhibiting evaporation of heavy metal by controlling its chemical speciation in MSWI fly ash

“…Because fly ash is composed of 24-27% lime and a portion of silicates and aluminosilicates [6], it is used as a raw material for civil materials, such as conventional ceramics, ceramic aggregate, clay brick, cement clinker and other raw material substitutions [7][8][9][10]. In these processes, the thermal treatment with a high temperature is a common method for fly ash consumption, where the contamination (dioxin and heavy metals) is decomposed (for dioxin) or encapsulated in a silicate-based glass-like matrix (for heavy metals) [11][12][13][14]. In particular, the toxicity characteristic leaching procedure (TCLP) results for heavy metals in the matrix are below than the national regulation limitation, indicating the high stability of heavy metals [15,16].…”

Characteristics of PCDD/Fs in a Particles Filtration Device with Activated Carbon Injection

“…Even with high PAC usage (40 kg/h), the PCDD/F concentration in flue gas still exceeds the regulatory limit of 1 ng I-TEQ/Nm 3 (factory process). This may be due to low PAC utilization efficiency (< 3%) in conventional activated carbon injection for a single bag filter system (Chi et al, 2007;Kim et al, 2007;Li et al, 2007).…”

Removal characteristics of PCDD/Fs by the dual bag filter system of a fly ash treatment plant

“…However, even with the high AC usage (40 kg h −1 ), the PCDD/F concentration still exceeded the limit of 1 ng I-TEQ N m −3 . This may have resulted from the low AC utilization efficiency (less than 3%) in the conventional activated carbon injection (ACI) for a single bag filter system [18].…”