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Sustainable Industrial Design and Waste Management
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they deplete the natural resources and might pollute the environment if they
are not managed properly.
Landfill
Rejects and/or ash produced from the incineration process should be land-
filled. Although landfill is still the most widely used method, it depletes the
natural resources and uses the unsustainable solid waste management
approach as discussed in Chapter 1.
In conclusion, recycling has proved to be the most suitable solution to the
problem of rejects for conservation of natural resources compared with
incineration and/or landfill according to the last 2Rs of the 7Rs Golden Rule
discussed in Chapter 1. Recycling of rejects will be discussed in detail in
Chapter 6.

Questions
1. Discuss the cost/benefit analysis of the traditional method of recycling
glass and converting glass cullet into foam glass.
2. Discuss the sustainability of municipal solid waste management in
your community. In other words what is the percentage of MSW land-
filled?
3. If the percentage of MSW landfilled in question 2 is not zero, what con-
stitutes the remaining MSW that cannot be recycled?
4. What kind of technology do you recommend using to recycle the
remaining MSW discussed in question 3? Recommend some recycled
products you can use in your community.
5. Compare between natural composting and passive composting to recy-
cle organic waste.
6. Some countries might recommend biodegradable plastics over poly-
meric plastics for environmental protection; comment.
7. What are the advantages and disadvantages of vermi-composting? Do
you recommend vermi-composting in your community? Why?