cost effective. Presently, there are no projects involving tyre pyrolysis and there are
no future plans to test any methods of tyre pyrolysis (See Appendix E).
There are two companies in Hong Kong that retread truck tyres. The bus
company, KMB, informed us through email communications that they retread their
own bus tyres regularly (See Appendix M). These companies retread the tyres
approximately three times before they are no longer useable. The retreaded tyres are
half the price of new tyres, however, they do not last as long. They do not make
retreaded tyres for small vehicles in Hong Kong, which is likely due to the consumer
perception that retreaded tyres are not as safe.
4.3 Model Legislation
The United States, Britain, Australia, and Japan all have legislation regulating
the disposal of waste tyres. One of the most effective methods for increasing
recycling is to ban the disposal of waste tyres in landfills. Hong Kong currently does
not do this, however according to Mr. Lee they do require tyres to be cut in half prior
to being dumped into the landfills (See Appendix E). Currently there is no other
legislation directly governing the disposal of waste tyres.
Other legislation affects the disposal or recycling of tyre waste. For example,
the emissions regulations in Hong Kong effectively ban any burning of waste tyres.
Dr. Wong informed us that even the emissions from heating rubberized asphalt mix
must also be taken under consideration (See Appendix G). Furthermore, Mr. Lee told
us that laws governing the export of waste make shipment to the mainland for
processing prohibitively expensive. Currently scrap tyres are viewed as a waste