Beyond The Dome takes on wastewater’s stubborn sludge problem
Beyond The Dome is developing a way for wastewater plants to treat sludge on site rather than send as much material elsewhere. Its modular system uses supercritical water oxidation. If it works reliably at a plant, the approach could offer an alternative to some off-site sludge handling. The engineering challenge is consequential: the process needs high pressure, and Beyond The Dome is researching ways to recover some of the energy used to create it.
A different destination for sludge
Wastewater treatment separates liquid from a semi-solid residue known as sewage sludge. Plants manage that material in several ways, including land application, landfilling and incineration, according to the U.S. Environmental Protection Agency.
Beyond The Dome’s proposed system is designed to connect to existing sludge-treatment infrastructure. The company invites facilities to request a proposal.
That design puts the treatment equipment at the facility where the material is produced. It could make the service relevant to operators looking for another way to manage sludge, provided the system performs in their conditions.
From a pilot to a possible service
At the Central Marin Sanitation Agency in California, the route from demonstration to a potential service is visible in public records.
A draft pilot agreement in the agency’s December 2023 board packet put pilot transport, operation, testing and validation costs on Beyond The Dome. It allowed for a negotiated annual fee after a successful demonstration, subject to an amendment.