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Everything from the exact number of wells installed on a landfill cell, to the type of collection system, affects the selection of a cover material.
Most of the factors that control the final gas production rate of any particular landfill cell, such as soil compaction or liner selection, are chosen long before it’s closed.
Designing a landfill cell with gas collection in mind from the start, is the best way to maximize production over time.
It’s easy to assume that all gas issues in a landfill cell are handled by the cover and that the liner only manages leachate and other liquids.
Gas release may begin as soon as the first layer of waste is added to the cell, but these early discharges of carbon dioxide and methane are usually permitted as long as they’re limited.
While landfill systems designed for gas collection and control may be primarily focused on gases, liquids also play important roles and can’t be overlooked.
Landfill gas is often mistaken for being a single type of gas due to being referred to by the LFG term.
All waste eventually breaks down, even if it takes thousands of years.
Ore processing may be an environmentally friendly and energy efficient way to recover metals that would otherwise be lost.
Each heap leaching facility has its own system for dealing with the leachate that flows from the pad.
Each heap leaching facility is unique in its design and the process it uses for ore recovery.
Despite the risks that come with using chemicals to separate ore from rock, heap leaching is one of the safest and least damaging methods to use.
Heap leaching is just the first stage in the ore recovery process.
Processing ponds are far from an isolated system on their own.
There are many methods for extracting ore from the raw rock and minerals they’re often mixed in with.
Natural swimming pools are among the trendiest types of residential ponds being built today.
Residential ponds may have a primary use for stormwater detention or wetland conservation, but fish often become a secondary part of the design.
Backyard pond design is particularly challenging for homeowners that need to work on a limited budget.
Even a little backyard water feature benefits from a real pond liner.
Pond liners are often mistaken as a material only used on large, professional, or public ponds.
There are plenty of pond building guides, especially older published sources, that claim flexible pond liners are unnecessary.
Residential ponds may come in many different designs, but they all fall into a few different categories.
For hundreds of years, heap leach pads were simple constructions of graded and berm soil with ore piled directly on top of the ground.
When compared to other widely used mining and processing methods, heap leaching is one of the least environmentally impactful options for producing precious metals.
A heap leach pad may seem simple to construction and similar in design to any other containment basin.