Answered: Explain what would happen to pH,…

Explain what would happen to pH, BOD/COD and metal concentrations in landfill leachate as a landfill ages (starting with a young landfill and ending with an older landfill)

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter8: Landfills

Section: Chapter Questions

Problem 8.7P

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Concept explainers

Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.

Question

Explain what would happen to pH, BOD/COD and metal concentrations in landfill leachate as a landfill ages (starting with a young landfill and ending with an older landfill)

Expert Solution

Step 1

Landfill leachate is defined as liquid present in the landfill due to percolation after rain. It contains high concentration of organic and in organic concentration which is highly toxic

Step 2

Constituents concentrations in the landfill leachate are in the following ranges as given in the table:

1000mg/
1800mg/
1000mg/1
250mg/1
60mg/1
BODS
COD
Ca
Mg
CI-1

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