Journal
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume 9, Issue 1, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.105172
Keywords
Home appliance recycling; Decabromodiphenyl ether; Destruction efficiency; Bromine; Plastic waste
Categories
Funding
- Environment Research and Technology Development Funds of the Environmental Restoration and Conservation Agency of Japan [3K163005, JPMEERF20193001]
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Controlled co-incineration is an effective method for destroying DecaBDE, with over 99.9999% destruction efficiency achieved. However, proper disposal of bottom and fly ash is crucial to avoid environmental and human impacts.
To investigate the destruction of decabromodiphenyl ether (decaBDE) contained in flame-retarded plastics, we conducted a series of co-incineration tests of plastic television (TV) housing waste at two commercial-scale industrial waste incinerators in Japan, one equipped with a rotary kiln furnace and the other with a stoker furnace. At the former, crushed TV housings containing 5.9% (59,000 mg/kg) decaBDE were mixed at 3.2 wt% with normal industrial waste and incinerated at 1000 degrees C; at the latter, crushed housings containing 4.9% (49,000 mg/ kg) decaBDE were mixed at 3.6 wt% with normal industrial waste and incinerated at 1100 degrees C. Destruction efficiencies of over 99.9999% were achieved at both plants, and discharge of brominated dioxins and furans was negligible. More than 70% of the total decaBDE output and 90% of the total bromine output were found in the bottom ash and the fly ash, respectively, suggesting that any undecomposed decaBDE was discharged into the bottom ash and that desorbed bromine was concentrated into the fly ash. Our findings indicate that controlled co-incineration is an environmentally sound method for destruction of decaBDE, but attention should be paid to disposing of the bottom and fly ash in a manner that avoids environmental and human impacts.
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