CASE STUDY By Dave Anderson Upgrading Highly Loaded Waste Ponds to “Bio-Gas Banks” Problem: Un-covered anaerobic systems can generate significant amounts of odors and renewable energy in the form of methane. The sulfides and methane are lost to the atmosphere due to lack of an impermeable barrier. If the basins were covered, the biogas could be captured, burned and converted to electricity and odors contained. A Missouri project, believed to be the largest and most comprehensive livestock manure-to-energy of its type in the world, is currently under way. The existing facultative basins collect waste from approximately 2 million hogs. The challenge was to convert over 40 basins to covered anaerobic systems that would capture the bio-gas. Solution: The earthen basins were co

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