Thermal treatment of electrical and electronic waste plastics

Abstract

During cocombustion tests up to 12 wt % of different types of electrical and electronic (E + E) waste plastics were added to pretreated municipal solid waste (MSW) in a test incinerator. The increased heating value improved the burnout of the bottom ashes. The level of polychlorinated dibenzo‐p‐dioxins and dibenzofurans in the raw gas was not altered significantly by the co‐combustion. Even high bromine (Br) load caused only limited concentrations of bromine containing dioxins and furans in the raw gas, which did not deteriorate the emission quality. Hence MSW combustion is a beneficial disposal route for limited amounts of certain E + E waste. Metallic components should carefully be separated prior to combustion.

Value-added products from thermochemical treatments of contaminated e-waste plastics

“…Air borne pollutants are also generated by open burnings, incinerations and combustions. Heating or burning of e-waste that contain halogenated compounds, such as BFRs, may lead to the emission of environmentally hazardous substances, like polybrominated, diphenyl ethers (PBDEs), polychlorinated dibenzo dioxins (PCDDs), polybroclorobenzo dioxins and polychlorobenzofurans (PBCDD/Fs) (Vehlow et al, 2000;Vehlow et al, 2003;Wang et al, 2010). Such toxins from e-wastes can cause chronic and acute health conditions to human (Kiddee et al, 2013).…”

“…Vehlow et al (Vehlow et al, 2000) mixed e-waste plastics with household MSW to find out the toxic emission in the different exit streams from an incineration plant. Increasing the ewaste plastic fraction in the feedstock increases organic compounds related to flame retardants, such as poly brominated diphenylethers (PBDPE), polybrominated biphenyls (PBB), tetrabromo-bisphenol A (TBBA), as well as active elements like bromine (Br), chlorine (Cl) or phosphorous (P).…”

Characterization and Production of Fuel Briquettes Made from Biomass and Plastic Wastes

“…Considering the high heating value of these materials, which is in the range of 18−46 MJ/kg [18][19][20], energy recovery is an attractive option for this plastic fraction [21].…”

Processos de separação de materiais metálicos e não metálicos na reciclagem de resíduos de placas de circuito impresso de microcomputadores

“…Sobre isto há poucas informações disponíveis sobre as classes de compostos utilizados para esse fim. Também não há nenhum método de análise padronizado para o procedimento de limpeza (recuperação) para essa classe de composto plástico, que pode sofrer reação, durante o tempo de vida total do produto (VEHLOW et al, 2000).…”

“…As pesquisas existentes, no entanto, têm a maior parte do foco, nos efeitos negativos de metais pesados, tais como Cd, Cu, Pb e Sb, maior destaque é dado aos metais Cu e Pb, que são frequentemente encontrados como metais puros, entre os resíduos eletrônicos de placas de circuito impresso (VEHLOW et al, 2000).…”