Page 393 - Solid Waste Analysis and Minimization a Systems Approach

WASTE MANAGEMENT GOALS AND OPPORTUNITIES 371

an assignment. They may still use heavy machinery and power tools in their everyday
work. As CNC machines have become less expensive, many smaller firms have started
using them.

27.2 Waste Management Goals

and Opportunities

The majority of solid waste generated by this sector is wood. Table 27.1 displays the
composition breakdown based on survey results.
As shown in the table, the recycling rate for this sector is approximately 52 percent.
As derived from the solid waste evaluation model discussed in Chap. 12, the equation
that estimates the annual waste generation per year per employee for this sector can
be calculated from the following:

Tons of solid waste generated per year = 17.40 × number of employees
− 7.76 × solid waste disposal cost per ton
− 217.59 if the company is ISO 140001 certified
+ 473.93

TABLE 27.1 WOOD- AND LUMBER-MANUFACTURING INDUSTRY SOLID
WASTE COMPOSITION (SURVEY RESULTS)

MATERIAL COMPOSITION (%) RECYCLING (%)

Wood 35 ± 8.8 84 ± 11.3
Paper 15 ± 3.8 14 ± 4.3
Mixed office paper 14 ± 3.5 14 ± 4.3
Newspaper 1 ± 0.3 2 ± 0.6
Metals 13 ± 3.3 84 ± 6.1
Ferrous metals 9 ± 2.3 85 ± 6.4
Nonferrous metals 4 ± 1.0 81 ± 6.0
Composite organic 11 ± 2.8 61 ± 18.9
OCC (cardboard) 6 ± 1.5 36 ± 11.2

Mixed plastics 5 ± 1.3 9 ± 2.8

Food waste 3 ± 0.8 0 ± 0.0
Yard waste 1 ± 0.3 0 ± 0.0

Glass 1 ± 0.3 6 ± 1.9
Other 10 ± N/A 0 ± 0.0

Overall recycling level 51.8