Geothermal Engineering lithium project: Watson‑Marlow pumps in practice for process engineers
Reviewed by Joe Ashwell
First reported on International Mining – News
30 Second Briefing
Geothermal Engineering Ltd has begun commercial-scale production of zero‑carbon lithium carbonate at its United Downs geothermal power plant in Cornwall, using Watson‑Marlow 630 and Qdos peristaltic pumps for reagent dosing. The pumps provide sealed, low‑maintenance chemical transfer with precise flow control, supporting closed‑loop extraction from hot brines and reducing operator exposure to corrosive fluids. For process engineers, the choice of peristaltic technology signals a preference for accurate metering and simplified containment over more complex diaphragm or centrifugal dosing systems in geothermal lithium circuits.
Technical Brief
- Sealed pump heads allow handling of aggressive brines and reagents without exposing operators to aerosols or splashes.
- Peristaltic hose elements provide the only wetted surface, simplifying compatibility checks with high-salinity geothermal fluids.
- Low-maintenance pump design reduces the need for on-site spares and workshop facilities at the plant.
- Modular skid-based dosing assemblies using these pumps can be replicated at future geothermal lithium sites.
- Similar geothermal brine projects could adopt peristaltic dosing to minimise corrosion issues in high-temperature, high-TDS circuits.
Our Take
Positioned in the Materials–Sustainability cluster of our coverage, GEL’s zero‑carbon lithium carbonate plans at United Downs suggest it could become a reference case for combining geothermal heat and lithium extraction in mature regulatory environments such as England.
Use of Watson‑Marlow peristaltic pumps at United Downs aligns with a broader pattern in our lithium project data where operators favour low‑shear, low‑maintenance pumping solutions to handle chemically aggressive brines without compromising product purity for battery‑grade lithium carbonate.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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