Boosting biogas production
Co-digestion increased biogas output by nearly 250%, fueling combined heat and power engines that meet plant energy needs.
Client
Greater Lawrence Sanitary District
Location
North Andover, Massachusetts
Markets
Priorities
Advancing energy independence through innovation
The Greater Lawrence Sanitary District (GLSD) has expanded its system to co-digest biosolids with organic food waste, converting them into renewable biogas. This locally generated clean energy powers the plant and supports grid independence, positioning GLSD as a regional leader in sustainable, net-zero wastewater treatment.
Generating clean, renewable power
When power generation exceeds plant demand, extra power is returned to the grid to offset costs for the district.
Leveraging public-private partnerships
A hybrid design-build delivery model balanced public oversight with private innovation for efficient, streamlined operations.
Securing statewide collaboration
Supported by Massachusetts agencies and private utilities, the project set a precedent for clean energy partnerships.
With the organics to energy project, GLSD is redefining sustainable wastewater management. The facility’s expanded digestion and combined heat and power systems enable significant cost savings, estimated at $2.5 million annually, while meeting stringent air quality standards.
“GLSD is focused on innovation and is always thinking about what the next development will be,” says project manager Benjamin Mosher, PE, BCEE. “They’re out in front, finding things that make both environmental and economic sense.”
Client
Greater Lawrence Sanitary District
Location
North Andover, Massachusetts