The greatest waste load for a textile manufacturer with the highest BOD is ___.

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Multiple Choice

The greatest waste load for a textile manufacturer with the highest BOD is ___.

Explanation:
Biochemical Oxygen Demand shows how much oxygen microbes need to oxidize biodegradable organics in wastewater. Waste streams rich in readily degradable nitrogenous organics and fats tend to push BOD higher. Wool waste contains substantial protein material (keratin) and is often accompanied by lanolin and other fats, all of which microbes readily metabolize. That combination creates a large amount of biodegradable material in the effluent, leading to a higher oxygen demand. Cotton is mainly cellulose, which degrades more slowly, and polyester is resistant to biodegradation, contributing little to BOD. Silk is protein-based as well, but the total degradable load is typically less than wool in common textile effluents, so wool yields the greatest BOD.

Biochemical Oxygen Demand shows how much oxygen microbes need to oxidize biodegradable organics in wastewater. Waste streams rich in readily degradable nitrogenous organics and fats tend to push BOD higher. Wool waste contains substantial protein material (keratin) and is often accompanied by lanolin and other fats, all of which microbes readily metabolize. That combination creates a large amount of biodegradable material in the effluent, leading to a higher oxygen demand. Cotton is mainly cellulose, which degrades more slowly, and polyester is resistant to biodegradation, contributing little to BOD. Silk is protein-based as well, but the total degradable load is typically less than wool in common textile effluents, so wool yields the greatest BOD.

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