Variation in trash composition in raw cottons

Area of Science:

• Agricultural Science
• Textile Science
• Environmental Science

Background:

• Cotton dust generated during yarn manufacturing poses occupational and environmental concerns.
• The composition of plant trash in raw cotton influences dust levels and processing efficiency.

Purpose of the Study:

• To identify and quantify plant trash components in machine-picked and machine-stripped raw cotton varieties.
• To understand the contribution of different trash types to potential cotton dust formation.

Main Methods:

• Examination of raw cotton samples using stereomicroscopy and bright-field microscopy.
• Analysis of plant trash fragments, including bract, leaf, stem, seed, boll, and weed fragments within a specific size range (841–2000 µm).

Main Results:

• Bract was consistently the predominant trash component across all examined raw cotton samples.
• Cotton leaf and non-cotton weed materials were also significant trash contributors in most varieties.
• Machine-picked and machine-stripped cotton varieties exhibited varying trash compositions.

Conclusions:

• Raw cotton trash, particularly bract and leaf fragments, is a primary source of cotton dust.
• Understanding trash composition is crucial for mitigating dust in textile manufacturing.
• Varietal differences in trash content highlight the need for careful cotton selection in processing.