BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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methane, leachate
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leachate, methane
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leachate, heavy metals
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asbestos, radon
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Detailed explanation-1: -Since landfills produce considerable quantities of methane, landfill gas can be burned to produce electric power.
Detailed explanation-2: -In general, there are three methods to treat landfill leachate: leachate transfer, biological processes, chemical and physical methods and membrane processes. Membrane processes can be divided into four types: microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO).
Detailed explanation-3: -Over time, the waste decomposes under the soil. Leachate and methane gases are byproducts of decomposition that are harmful to the environment. Methane collection systems prevent greenhouse gas emissions. Leachate collection systems prevent groundwater and soil contamination.
Detailed explanation-4: -Landfill gases are produced when bacteria break down organic waste. The amount of these gases depends on the type of waste present in the landfill, the age of the landfill, oxygen content, the amount of moisture, and temperature.