Renewable natural gas company Viridi Energy had acquired a biosolids digester plant in Brunswick, Maine that it intends to transform into a waste-to-RNG facility, according to a March 19 press release.
Virdi will use anaerobic digestion to transform biosolids into enough energy to heat more than 3,000 homes for a year, the company said.
Casella Waste Systems Inc., a regional solid waste, recycling, and resource management services company, will manage feedstock collection and delivery logistics for an estimated 85,000 tons of biosolids per year collected from a network of wastewater treatment plants. Once processed, Casella will transport the more stable, post-process digestate to landfill in a form that preserves landfill capacity, lessens the need for stabilization material and reduces transportation distances.
Viridi is currently conducting siting, permitting, and environmental due diligence at the Brunswick site. Retrofit construction of the Brunswick facility is expected to be complete by the second half of 2025, with full operations slated to commence in 2026.
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