The year 1906 is associated with which wastewater-related development?

Study for the Texas Wastewater D Test. Use flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

The year 1906 is associated with which wastewater-related development?

Explanation:
An early milestone in wastewater treatment is the Imhoff tank, introduced around 1906. This design uses a two-compartment sedimentation approach: the upper chamber slows and clarifies the wastewater, while a lower sludge chamber digests and stores the settled solids. Keeping the sludge separate from the clarified liquid improves solids removal and makes sludge handling more practical, marking a meaningful advancement in primary treatment at that time. The other options refer to developments far outside 1906—ancient Rome’s cloaca system, and U.S. agencies formed in the mid- to late 20th century—so they don’t match the historical year.

An early milestone in wastewater treatment is the Imhoff tank, introduced around 1906. This design uses a two-compartment sedimentation approach: the upper chamber slows and clarifies the wastewater, while a lower sludge chamber digests and stores the settled solids. Keeping the sludge separate from the clarified liquid improves solids removal and makes sludge handling more practical, marking a meaningful advancement in primary treatment at that time. The other options refer to developments far outside 1906—ancient Rome’s cloaca system, and U.S. agencies formed in the mid- to late 20th century—so they don’t match the historical year.

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