Description
The “Purification of Water (55x90cm)” chart is a large, laminated educational poster that visually explains the major processes and technologies used to purify water for safe human consumption. It provides a clear, step-by-step overview, suitable for science classrooms and laboratories at secondary and junior college levels.
Key Features
Large-Scale Water Purification:
The chart typically illustrates the principal stages involved in municipal or community water treatment:
Storage: Sedimentation tanks or reservoirs where heavy particles settle out by gravity.
Filtration: Cross-sections of slow sand filters (showing supernatant water, sand bed, vital layer/schmutzdecke, drainage, and control devices) and rapid sand filters with clear labeled layers.
Disinfection: Diagrams of chlorination, ozonation, or ultraviolet treatment units to remove bacteria and pathogens.
Small-Scale/Household Methods:
Boiling, chemical disinfection (chlorine, iodine tablets), ceramic and activated carbon filters, portable water purification steps.
Accompanying notes may summarize other methods such as reverse osmosis, use of coagulants (alum), and routine monitoring for quality assurance.
Educational Use
Presented in English, printed in vibrant colors and laminated for durability, the 55x90cm chart is ideal for classroom wall display or hands-on discussion during science lessons.
Labeled diagrams illustrate the flow of water through each purification stage, with arrows, cross-sections, and concise descriptions for each step.
Serves as a comprehensive visual guide for students to understand practical and theoretical aspects of water purification technologies.