Title: Hagenmaier drum - fly ash Dechlorination/ hydrogenation process: Combinatorial bio/chemical analysis

Auteur(s): Behnisch PA ; Hosoe K ; Ozaki H ; Nakamura K ; Brouwer A ; Sakai S ;  ; 

Year: 2001

Journal: Organohalogen Compounds

Subject(s): DR CALUX ; fly ash ; Micro-EROD-bioassay ; dioxins ; dioxin ; PCDD/F ; PCBs ; PCB ; bioassay ;  ; 

Summary: Low temperature treatment (below 400 °C) of fly ashes under oxygen deficiency conditions (thermo-catalytic treatment or Hagenmaier process) has been already applied on several municipal waste incinerator plants in Germany and Japan as a successful method for the reduction of dioxins and related compounds. Hagenmaier (1988) obtained reductions of PCDD/Fs in a range of 95 to 99.9%, and for PCBs, chlorobenzenes and chloronaphthalenes of 93%. Also Ishida et al. (1996) reported about a decrease in the I-TEQ from 0.6 I-TEQ ng/g in untreated ash to 0.002 I-TEQ ng/g (99.7% PCDD/Fs decompostion ratio) in treated ash (350° C, 1 h retention time). In addition, Sakai (1999) also showed that TEQ-values from about 100 µg TEQ/ton waste on average (combustion technologies in 1999) could be reduced to about 3.8 µg TEQ/ton waste on average (96% treatment efficiency). This result is comparable to the also in the same study reported 4.15 µg TEQ/ton waste on average gasification melting technology. The future target in Japan for the total amount of PCDD/Fs released by regulatory standards is 5 µg TEQ/ton waste on average. The aim of the present study was to confirm the decrease of PCDD/F-TEQs, bioassay-TEQ-values (m.easured by Micro-EROD and DR-CALUX® bioassays) and therefore the total sum of dioxin-like activity for two fly ashes treated by the Hagenmaier process in one incineration plan