The technology is particularly useful for animal operations in dry regions where water is at a premium, the school said.
The McLanahan Nutrient Separation System is an add-on to an anaerobic digester, which extracts energy and chemicals from manure. The system adds ultrafiltration, air stripping and a reverse osmosis system to produce water that's clean enough for cattle to drink.
The system has value both in conserving resources and protecting the environment, said
"If you have 1,000 cows on your operation, they produce about 10 million gallons of manure a year," Safferman said in a statement. "Here in
Manure also "contains large amounts of nutrients, carbon and pathogens that can have an environmental impact if not properly managed. Said Safferman."
A particular issue is ammonia "that would otherwise be lost in the atmosphere," said
About 90 percent of manure is water. The system now extracts about 50 gallons of water from each 100 gallons of manure, and Wallace said developers are aiming at raising that to 65 gallons.
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