Galliford Try, the housebuilding and construction group, announces that it has been awarded a pair of contracts by Yorkshire Water to upgrade the Blackburn Meadows waste water treatment plant in Sheffield.The larger of the contracts is worth £31m and will ensure that Blackburn Meadows meets the requirements of the EU's Freshwater Fish Directive. The programme will last around 18 months. The second scheme is worth £18m and will result in a new mesophilic anaerobic digestion plant; mesophilic anerobic digestion is the process where micro-organisims break down biodegradable material in a moderate temperature environment. Greg Fitzgerald, Chief Executive of Galliford Try, said: "We have considerable expertise and experience of anaerobic digestion from other water clients and we're glad to have the opportunity to share this with Yorkshire Water."NR