Poplar seeds are embedded in a cotton-like matrix that enables floatation on wind and water.
The factory discharges its effluent to sewer following partial treatment using dissolved air floatation (DAF) technology and high rate filtration.
Soft drinks group Britvic, owned by InterContinental Hotels, Whitbread and Pernod Ricard, is planning a floatation next month.
Google bought a 2.6 per cent share in the company June 2004, shortly before its own public floatation.
It also heralds a successful floatation of its petrochemical firm, Innovene that was segregated into an independent company in April.
