BioFiltro

At Royal Dairy in Royal City, Washington, liquid manure goes through solid separators and a first storage lagoon, then through BioFiltro's BIDA® system before the treated effluent reaches a second lagoon. The four-hour treatment keeps solids and nutrients out of that lagoon, so methane no longer forms there; BioFiltro estimates the avoided emissions at tens of thousands of tonnes of CO₂ equivalent each year for this one lagoon. In 2020 the emission reductions were registered under Verra's Verified Carbon Standard, and the carbon credits were sold to a global consumer goods company as part of its pledge to lower its dairy footprint.

Danone and Leprino signed a multi-year sustainability agreement that aims to cut on-farm emissions by 50% by 2030, and BioFiltro's technology is at its heart. The first project installs a BioFiltro system on a California dairy farm. By cleaning manure wastewater through vermifiltration, the system is expected to cut methane emissions by 40,000 tCO₂e per year and recycle nearly 0.7 billion litres of water annually, while producing worm castings for soil health and crop yield. For a food company, it is a way to reduce Scope 3 emissions at the source, on the farms that supply its milk.

The Agueda family's Alberto Dairy in Stanislaus County, California, partnered with BioFiltro to install the state's largest vermifiltration system to date. Millions of red wiggler worms treat the dairy's wastewater, significantly reducing nitrogen, phosphorus and methane emissions while producing reusable water and vermicompost. It is BioFiltro's next-generation BIDA® design, which uses less concrete for the same treatment, and the project was featured in Ag Alert.

Sleeping Giant Winery has treated its process water with a BioFiltro system since spring 2022. All of it is treated to California Title 22 reuse standards and reused to irrigate the vineyard. Ahead of the 2025 grape crush, the winery carried out its first filter media replacement, a routine step every 2 to 3 years for food and beverage processors: the vermicompost taken out of the beds was cured on site for about a month, then spread on the vineyards and the tasting room garden. Fresh wood shavings and worm-rich compost restarted the beds, with no sludge to haul away.