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Thames Water recovers phosphorus as struvite at the company’s Slough sewage treatment works using the Ostara process.

As well as producing a high-quality fertiliser (Crystal Green®) worth UK£ 37 000 /year, the process improves the biological nutrient removal process (ensuring discharge consents) saves the company £ 100 000 in P-removal dosing chemicals, £ 75 000 reduced sewage sludge transport, £ 31 000 operating savings (nuisance deposits) and has achieved major media interest (see e.g. Aljazeera report on Crystal Green®). See SCOPE Newsletter 99.


See member page of Thames Water

See member page of Ostara 



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