Texas Wastewater Class B Practice Exam

How are solids in wastewater classified?

1. Organic and inorganic only

2. Total, suspended, dissolved, settleable, non-settleable, floatable

3. Safe and hazardous

4. Solid and liquid

The correct answer is: Total, suspended, dissolved, settleable, non-settleable, floatable

The classification of solids in wastewater is primarily based on physical and chemical characteristics, and the correct answer accurately captures the various forms in which solids can exist. Classification into total, suspended, dissolved, settleable, non-settleable, and floatable solids provides a comprehensive framework for understanding and managing wastewater treatment processes. Total solids refer to everything present in the wastewater, while suspended solids are those that do not dissolve and can be removed through filtration. Dissolved solids, on the other hand, are those that are in solution and can pass through filters. Settled solids can be removed through sedimentation processes, whereas non-settleable solids remain suspended in water. Floatable solids may include materials like fats and oils, which can introduce additional challenges in treatment. This detailed categorization helps wastewater treatment facilities implement effective methods for sedimentation, filtration, and other treatment processes to ensure the removal of solids, ultimately improving effluent quality and meeting regulatory standards. The focus on various types of solids allows operators to tailor their treatment strategies accordingly, making it a fundamental concept in wastewater management.