Page 8 - mobile Workbook-chapter 2
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Some engineers define moisture content on a dry weight basis as
w − d
M = × 100
d
where: Md is moisture content on a dry basis, %
Analysis procedure Drying in an oven at 105 C
o
For 24 h to ensure complete dehydration and yet avoid undue vaporization of volatile material
Step 1: Weigh the aluminum dish
Step 2: Fill the dish with SW sample and re-weigh
Step 3: Dry SW + dish in an oven for at least 24 hrs at 105°C
Step 4: Remove the dish from the oven, allow to cool in a desiccator, and weigh
Step 5: Record the weight of the dry SW + dish
Step 6: Calculate the moisture content (M) of the SW sample using the equation given above.
Example 2-4
For the following waste mixture,
No Components Wet weight (kg) Dry weight (kg)
1. Textiles 2.0 1.8
2. Rubber 0.5 0.5
3. Leather 0.5 0.4
4. Wood 2.0 1.6
5. Carton 6.0 5.7
Determine the moisture content (M%)
Answer
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