116
6.2.4 Electronic-Waste on Environmental Public Health
Several types of research were under progress to study the effect of Electronicwaste on the environment. Xue et al. (2015) reported the impact of formal recycling
of printed circuit boards on the environment. Fujimori et al. (2012) reported the
enhancement factors, dangerous indicators, and concentration of metals present in
soil due to proper and improper recycling of Electronic-waste. Mostly, major studies are carried on focusing on the emissions from improper recycling of wastes.
Some studies are conducted on assessing the effect of Electronic-waste on health.
6.3 Energy Recovery from Electronic-Waste
Plastic wastes can be incinerated in bulk quantity to generate energy; due to the
presence of high-value polymers, they can act as an alternative fuel resource.
However, energy recovery may be ecologically resourceful in the case of bulk handling of plastics by fulfilling the emission regulations and energy need. Figure 6.3
elaborates the methodology for energy recovery from Electronic-waste.
Recycling of plastics through mechanical and chemical methods is getting its
importance than land filling and incineration methods. Chemical recycling is an
economically feasible technique for waste electrical and electronic equipment treatment, including methods like pyrolysis, hydrothermal treatment, and catalytic
pyrolysis toward converting waste electrical and electronic equipment plastics into
chemicals and high-energy fuels.
6.3.1 Chemical Recycling
Plastic waste and Electronic-waste are used as feedstock for generation of fuels and
valuable products. Globally the interest was not only on treatment of waste but also
on recovery of some eco-friendly products like petrochemical feedstock. These
feedstocks possess higher hydrocarbon content than other biomass. Base material is
cheaper than the chemically recycled polymers due to capital investment, raw material cost, etc. Polyethylene terephthalate methanolysis was carried out with methanol under higher temperatures (180–280 °C) and pressures (20–40 atm), yielding
dimethyl terephthalate and ethylene glycol. Table 6.3 describes the advantages and
challenges of the chemical and mechanical recycling process. Matsushita Electric
Works, Ltd., Japan, was generating a depolymerization methodology for treating
flame-retardant polymers through hydrolysis under subcritical water. In this methodology, recycling rate of 70% was achieved on recycling thermosetting resin in
flame-retardant polymers into basic materials.
J. Arun and K. P. Gopinath
6.2.4 Electronic-Waste on Environmental Public Health
Several types of research were under progress to study the effect of Electronicwaste on the environment. Xue et al. (2015) reported the impact of formal recycling
of printed circuit boards on the environment. Fujimori et al. (2012) reported the
enhancement factors, dangerous indicators, and concentration of metals present in
soil due to proper and improper recycling of Electronic-waste. Mostly, major studies are carried on focusing on the emissions from improper recycling of wastes.
Some studies are conducted on assessing the effect of Electronic-waste on health.
6.3 Energy Recovery from Electronic-Waste
Plastic wastes can be incinerated in bulk quantity to generate energy; due to the
presence of high-value polymers, they can act as an alternative fuel resource.
However, energy recovery may be ecologically resourceful in the case of bulk handling of plastics by fulfilling the emission regulations and energy need. Figure 6.3
elaborates the methodology for energy recovery from Electronic-waste.
Recycling of plastics through mechanical and chemical methods is getting its
importance than land filling and incineration methods. Chemical recycling is an
economically feasible technique for waste electrical and electronic equipment treatment, including methods like pyrolysis, hydrothermal treatment, and catalytic
pyrolysis toward converting waste electrical and electronic equipment plastics into
chemicals and high-energy fuels.
6.3.1 Chemical Recycling
Plastic waste and Electronic-waste are used as feedstock for generation of fuels and
valuable products. Globally the interest was not only on treatment of waste but also
on recovery of some eco-friendly products like petrochemical feedstock. These
feedstocks possess higher hydrocarbon content than other biomass. Base material is
cheaper than the chemically recycled polymers due to capital investment, raw material cost, etc. Polyethylene terephthalate methanolysis was carried out with methanol under higher temperatures (180–280 °C) and pressures (20–40 atm), yielding
dimethyl terephthalate and ethylene glycol. Table 6.3 describes the advantages and
challenges of the chemical and mechanical recycling process. Matsushita Electric
Works, Ltd., Japan, was generating a depolymerization methodology for treating
flame-retardant polymers through hydrolysis under subcritical water. In this methodology, recycling rate of 70% was achieved on recycling thermosetting resin in
flame-retardant polymers into basic materials.
J. Arun and K. P. Gopinath