10 07 29 Master thesis Juliana Leon - e-Waste. This guide

3.3.2 Informal refurbishment and reparation....................................................................... 27
3.3.3 Informal dismantling and material trading.................................................................. 29
3.3.4 Informal metal extraction ........................................................................................... 31
3.4 Material Flow Analysis ........................................................................................... 32
3.4.1 Definition of the system ............................................................................................. 32
3.4.2 Model scenarios......................................................................................................... 33
3.4.3 Assessment of total computer waste flows................................................................ 34
3.4.4 Assessment of CRT glass flows ................................................................................ 37
3.4.5 Assessment of PWBs flows ....................................................................................... 40
3.4.6 Assessment of plastic flows....................................................................................... 42
3.4.7 Other unwanted processes........................................................................................ 45
3.5 Including the IS into a future formal e-waste management system................... 45
3.5.1 Diversion of IS collected flows into a formal management system............................ 46
3.5.1.1 Economical aspects..................................................................................................47
3.5.1.2 Environmental benefits .............................................................................................49
3.5.1.3 Social benefits ..........................................................................................................50
3.5.2 Disassembly in waste cooperatives and municipal recycling centres........................ 50
3.5.2.1 Economical aspects..................................................................................................51
3.5.2.2 Environmental benefits .............................................................................................52
3.5.2.3 Social benefits ..........................................................................................................52
3.5.3 Promote formalization of informal businesses ........................................................... 52
3.5.4 Exclusion of the informal sector................................................................................. 53
4 FINAL REMARKS.............................................................................54
4.1 Computer waste generation................................................................................... 54
4.2 Field survey ............................................................................................................. 55
4.3 Material Flow Analysis ........................................................................................... 55
5 CONCLUSIONS................................................................................57
6 ACKNOWLEDGEMENTS.................................................................60
7 REFERENCES..................................................................................61
8 APPENDIXES ...................................................................................65
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