Purdue News PhotosPurdue News Photos
7/97-- Purdue researchers have developed a process to make a nutrient-rich soil additive from coal ash, industrial byproducts and yard waste. Here, oxygen levels inside the composting material are closely monitored by Patrick Tishmack, left, a graduate student in chemistry at Purdue, and Alexander Bunn, assistant site manager with ReUse Technology, a North Carolina company.
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(Purdue News Service Photo by David Umberger)
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