Rookwood raises £800,000 to pull phosphate from water
What's the deal? Cleantech firm Rookwood OperationsDealroom has a profile for this one. Try Dealroom → has raised £800,000 in an early-stage round led by the British Business Bank's South West Investment Fund, backed by Sustainable VenturesDealroom has a profile for this one. Try Dealroom → and private angels. The round includes a £550,000 equity investment made through The FSE GroupDealroom has a profile for this one. Try Dealroom →, which manages part of the fund.
What's the endgame? Rookwood is commercialising a nature-based technology that removes phosphate pollution from water. The recovered nutrient is intended for reuse as fertiliser, tackling two linked problems: phosphate pollution and reliance on mined fertiliser inputs.
Why now? The funding follows a trial with Bristol WaterDealroom has a profile for this one. Try Dealroom → at Chew Valley Reservoir, where Rookwood's passive filter captured phosphate even at low concentrations. The round also sits alongside a £700,000 Innovate UK award, giving the company support to pursue further trials and potential deployment.
What could go wrong? The payoff depends on whether those trials prove reliable performance and a commercially viable route to wider use. Rookwood is still moving from development toward real-world validation.
The signal: At £800,000, this is a small early-stage cheque — sitting in roughly the 21st percentile by amount. But the South West Investment Fund, a £200m regional vehicle offering loans and equity to smaller businesses, shows how public-backed capital is channelling into niche cleantech tackling specific environmental pressures.
Read more: ground.news
Image credit: USDAgov
