Which of the following is a key feature of a bioreactor landfill?

A bioreactor landfill is characterized by the active management of liquids and gases, which distinguishes it from traditional landfills. This feature involves the deliberate addition of moisture (often referred to as leachate recirculation) to enhance microbial activity and accelerate the decomposition of waste. Additionally, gases produced during the decomposition process, such as methane, are monitored and managed to prevent emissions and harness energy if possible.

The active management of these factors contributes to more efficient waste breakdown and can reduce the overall environmental impact, making bioreactor landfills an effective option for waste management. This management is essential in maintaining control over the conditions within the landfill, ensuring that the waste decomposition processes operate optimally. While increased leachate production is a consequence of this management, it is not the defining feature itself.

The presence of anaerobic conditions is crucial for the functioning of a bioreactor landfill, as many waste biodegradation processes occur in such environments. Minimal engineering involvement would not be consistent with the design principles of a bioreactor landfill, which rely on specific engineering controls to ensure effective operation.