Open dumpsites have a devastating impact on the environment and public health. Waste Management World spoke to James Law, Chair of the ISWA Landfill Working Group and the Task Force on Closing Dumpsites Initiative, about the key steps and economics of closing dumpsites, the climate benefits, and the pros and cons of biomining.
James Law explains that since the operation of a dumpsite does not include the application of daily cover or waste compaction and also it does not have a bottom liner or gas and leachate collection system, the most common risks are groundwater contamination, fire hazards that could generate black carbon fume and toxic gases to impact the air quality and thus affect the public health in the immediate area or areas miles away in downwind direction.
The gas emissions from open dumpsites have a direct impact on climate change. Then there are odor issues, either from the decomposed waste mass itself or from the leachate seep outbreaks located on the side slopes of a dumpsite. The leachate seeps will impact the surface water bodies such as rivers and lakes nearby in the downstream direction as well as the groundwater below the dumpsite. Most dumpsites have people or informal waste pickers on them. Therefore they have a direct impact on their health and safety point of view.
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