Electro-hydraulic fragmentation vs conventional crushing of photovoltaic panels – Impact on recycling

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-03-15
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
43-50
Series
Waste Management, Volume 87
Abstract
Currently, the first generation of solar panels are reaching their end-of-life, however so far, there is no best available technology (BAT) to deal with solar panel waste in terms of the optimized circular economy of metals. In this brief communication, electro-hydraulic fragmentation (EHF) is explored as an initial conditioning stage of photovoltaic (PV) modules to facilitate the recovery of valuable metals with the main goal to produce liberated fractions that are suitable for the retrieval of materials like Si, Ag, Cu, Sn, Pb, and Al. When compared to traditional crushing, the results suggest that dismantling of PV panels using EHF shows more selectivity by concentrating metals among well-defined particle size fractions. Using this method, the subsequent recovery of metals from PV panels can be achieved in a straightforward manner by simple means like sieving. The fragmentation achievable with EHF technology allowed approximately 99% Cu, 60% Ag, 80% of Pb, Sn and Al total elemental weight within the solar panels to be concentrated solely within the >4 mm size range, whereas high purity (>99%) Si could be found in the fractions between >0.50 mm and <2 mm. To the best of the authors’ knowledge, this paper presents for the first time a comparative analysis on the use of EHF technique and conventional crushing for the processing of PV solar panel waste.
Description
Keywords
Circular economy, Closed loop, Mechanical processing, Metal recovery, Secondary raw materials, Solar panel waste
Other note
Citation
Nevala , S M , Hamuyuni , J , Junnila , T , Sirviö , T , Eisert , S , Wilson , B P , Serna-Guerrero , R & Lundström , M 2019 , ' Electro-hydraulic fragmentation vs conventional crushing of photovoltaic panels – Impact on recycling ' , Waste Management , vol. 87 , pp. 43-50 . https://doi.org/10.1016/j.wasman.2019.01.039