In a sanitary landfill, leachate is best described as:
Correct answer: A. Contaminated liquid draining through waste
- A. Contaminated liquid draining through waste
- B. Methane collected from decomposing waste
- C. Ash remaining after waste combustion
- D. Stormwater flowing over an unused site
Explanation
Leachate forms when water passes through waste and dissolves or carries contaminants with it. Methane is a landfill gas, while ash is a combustion residue and clean stormwater is not necessarily leachate.
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Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
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