Using worms to purify dairy wastewater at Fresno State

Published at 11:07 a.m. on June 13, 2014 | Modified at 11:07 a.m. on June 13, 2014

Hundreds of thousands worms in sawdust and wood chips are used in a large bio filtration device are used in a pilot program by Bio Filtro, a Chilean company in a process to clean dairy wastewater at Fresno State's Water, Energy and Technology Center (WET). Video: John Walker/The Fresno Bee

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