Leachate is a coloured liquid that comes out of
- Aseptic tanks
- Bsanitary landfillsCorrect
- Ccompost plants
- Daerated lagoons
Solution
Concept
Source of leachate in solid waste management
Formula
NONE
Step-by-step solution
1. Rainwater and moisture percolating through buried solid waste dissolve organic and inorganic substances. 2. This liquid extracts soluble and suspended materials as it drains from the bottom of waste deposits. 3. Therefore, leachate is a colored liquid that comes out of sanitary landfills. Answer: B
Explanation
Leachate is formed when rainwater percolates through layers of buried solid waste inside a sanitary landfill. As the water passes through decomposing waste, it dissolves chemical compounds and organic pollutants, emerging as a dark, highly contaminated liquid that requires containment and treatment.
Why the other options are wrong
A) Septic tanks discharge liquid effluent and settled septage. C) Compost plants produce solid compost and minimal runoff. D) Aerated lagoons produce treated wastewater effluent.
Shortcut
Leachate = Contaminated liquid draining from Sanitary Landfills.
Common mistake
Confusing sanitary landfill leachate with effluent from septic tanks or liquid from compost plants.
Correct answer: B) sanitary landfills