Fetzer Vineyards completed a wastewater treatment system that utilizes billions of worms to clean up the winery's process water.

The worms work in tandem with microbes to digest contaminants in greywater. The BIDA (biofilter dynamic aerobic) system, from BioFiltro, uses 85 percent less energy to clean winery water and regenerates up to 17 million gallons annually for reuse in vineyards and landscaping.

According to Fetzer, it is the first American winery to use the system to treat 100 percent of its wastewater. Click here to see a video that shows how it works.