Municipal Solid Waste (MSW) Landfill: virtual
tour
What is a Bioreactor Landfill?
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Bioreactor landfills that are part of a major source MSW landfill
are also covered by the MACT rule for MSW landfills. A bioreactor
landfill operates to rapidly transform and degrade organic waste.
The increase in waste degradation and stabilization is accomplished
through the addition of liquid and air to enhance microbial processes.
This bioreactor concept differs from the traditional “dry
tomb” municipal landfill approach.
A bioreactor landfill is not just a single design and will correspond
to the operational process invoked. There are three different general
types of bioreactor landfill configurations:
 Aerobic
In an aerobic bioreactor landfill, leachate is removed
from the bottom layer, piped to liquids storage tanks, and re-circulated
into the landfill in a controlled manner. Air is injected into
the waste mass, using vertical or horizontal wells, to promote
aerobic activity and accelerate waste stabilization.
 Anaerobic
In
an anaerobic bioreactor landfill, moisture is added to the waste
mass in the form of re-circulated leachate and othersources to
obtain optimal moisture levels. Biodegradation occurs in the absence
of oxygen (anaerobically) and produces landfill gas. Landfill gas,
primarily methane, can be captured to minimize greenhouse gas emissions
and for energy projects.
Hybrid (Aerobic-Anaerobic)
The hybrid bioreactor landfill accelerates
waste degradation by employing a sequential aerobic-anaerobic treatment
to rapidly degrade organics in the upper sections of the landfill
and collect gas from lower sections.
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